Andrew's git - gitweb.git/blob

   1#!/usr/bin/perl
   2# Copyright (C) 2006, Eric Wong <normalperson@yhbt.net>
   3# License: GPL v2 or later
   4use 5.008;
   5use warnings;
   6use strict;
   7use vars qw/    $AUTHOR $VERSION
   8                $sha1 $sha1_short $_revision $_repository
   9                $_q $_authors $_authors_prog %users/;
  10$AUTHOR = 'Eric Wong <normalperson@yhbt.net>';
  11$VERSION = '@@GIT_VERSION@@';
  12
  13# From which subdir have we been invoked?
  14my $cmd_dir_prefix = eval {
  15        command_oneline([qw/rev-parse --show-prefix/], STDERR => 0)
  16} || '';
  17
  18my $git_dir_user_set = 1 if defined $ENV{GIT_DIR};
  19$ENV{GIT_DIR} ||= '.git';
  20$Git::SVN::default_repo_id = 'svn';
  21$Git::SVN::default_ref_id = $ENV{GIT_SVN_ID} || 'git-svn';
  22$Git::SVN::Ra::_log_window_size = 100;
  23$Git::SVN::_minimize_url = 'unset';
  24
  25if (! exists $ENV{SVN_SSH} && exists $ENV{GIT_SSH}) {
  26        $ENV{SVN_SSH} = $ENV{GIT_SSH};
  27}
  28
  29if (exists $ENV{SVN_SSH} && $^O eq 'msys') {
  30        $ENV{SVN_SSH} =~ s/\\/\\\\/g;
  31        $ENV{SVN_SSH} =~ s/(.*)/"$1"/;
  32}
  33
  34$Git::SVN::Log::TZ = $ENV{TZ};
  35$ENV{TZ} = 'UTC';
  36$| = 1; # unbuffer STDOUT
  37
  38sub fatal (@) { print STDERR "@_\n"; exit 1 }
  39
  40# All SVN commands do it.  Otherwise we may die on SIGPIPE when the remote
  41# repository decides to close the connection which we expect to be kept alive.
  42$SIG{PIPE} = 'IGNORE';
  43
  44# Given a dot separated version number, "subtract" it from
  45# the SVN::Core::VERSION; non-negaitive return means the SVN::Core
  46# is at least at the version the caller asked for.
  47sub compare_svn_version {
  48        my (@ours) = split(/\./, $SVN::Core::VERSION);
  49        my (@theirs) = split(/\./, $_[0]);
  50        my ($i, $diff);
  51
  52        for ($i = 0; $i < @ours && $i < @theirs; $i++) {
  53                $diff = $ours[$i] - $theirs[$i];
  54                return $diff if ($diff);
  55        }
  56        return 1 if ($i < @ours);
  57        return -1 if ($i < @theirs);
  58        return 0;
  59}
  60
  61sub _req_svn {
  62        require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
  63        require SVN::Ra;
  64        require SVN::Delta;
  65        if (::compare_svn_version('1.1.0') < 0) {
  66                fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
  67        }
  68}
  69my $can_compress = eval { require Compress::Zlib; 1};
  70push @Git::SVN::Ra::ISA, 'SVN::Ra';
  71push @Git::SVN::Editor::ISA, 'SVN::Delta::Editor';
  72use Carp qw/croak/;
  73use Digest::MD5;
  74use IO::File qw//;
  75use File::Basename qw/dirname basename/;
  76use File::Path qw/mkpath/;
  77use File::Spec;
  78use File::Find;
  79use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
  80use IPC::Open3;
  81use Git;
  82use Git::SVN::Fetcher qw//;
  83use Git::SVN::Prompt qw//;
  84use Memoize;  # core since 5.8.0, Jul 2002
  85
  86BEGIN {
  87        # import functions from Git into our packages, en masse
  88        no strict 'refs';
  89        foreach (qw/command command_oneline command_noisy command_output_pipe
  90                    command_input_pipe command_close_pipe
  91                    command_bidi_pipe command_close_bidi_pipe/) {
  92                for my $package ( qw(Git::SVN::Editor
  93                        Git::SVN::Migration Git::SVN::Log Git::SVN),
  94                        __PACKAGE__) {
  95                        *{"${package}::$_"} = \&{"Git::$_"};
  96                }
  97        }
  98        Memoize::memoize 'Git::config';
  99        Memoize::memoize 'Git::config_bool';
 100}
 101
 102my ($SVN);
 103
 104$sha1 = qr/[a-f\d]{40}/;
 105$sha1_short = qr/[a-f\d]{4,40}/;
 106my ($_stdin, $_help, $_edit,
 107        $_message, $_file, $_branch_dest,
 108        $_template, $_shared,
 109        $_version, $_fetch_all, $_no_rebase, $_fetch_parent,
 110        $_merge, $_strategy, $_preserve_merges, $_dry_run, $_local,
 111        $_prefix, $_no_checkout, $_url, $_verbose,
 112        $_git_format, $_commit_url, $_tag, $_merge_info, $_interactive);
 113$Git::SVN::_follow_parent = 1;
 114$Git::SVN::Fetcher::_placeholder_filename = ".gitignore";
 115$_q ||= 0;
 116my %remote_opts = ( 'username=s' => \$Git::SVN::Prompt::_username,
 117                    'config-dir=s' => \$Git::SVN::Ra::config_dir,
 118                    'no-auth-cache' => \$Git::SVN::Prompt::_no_auth_cache,
 119                    'ignore-paths=s' => \$Git::SVN::Fetcher::_ignore_regex,
 120                    'ignore-refs=s' => \$Git::SVN::Ra::_ignore_refs_regex );
 121my %fc_opts = ( 'follow-parent|follow!' => \$Git::SVN::_follow_parent,
 122                'authors-file|A=s' => \$_authors,
 123                'authors-prog=s' => \$_authors_prog,
 124                'repack:i' => \$Git::SVN::_repack,
 125                'noMetadata' => \$Git::SVN::_no_metadata,
 126                'useSvmProps' => \$Git::SVN::_use_svm_props,
 127                'useSvnsyncProps' => \$Git::SVN::_use_svnsync_props,
 128                'log-window-size=i' => \$Git::SVN::Ra::_log_window_size,
 129                'no-checkout' => \$_no_checkout,
 130                'quiet|q+' => \$_q,
 131                'repack-flags|repack-args|repack-opts=s' =>
 132                   \$Git::SVN::_repack_flags,
 133                'use-log-author' => \$Git::SVN::_use_log_author,
 134                'add-author-from' => \$Git::SVN::_add_author_from,
 135                'localtime' => \$Git::SVN::_localtime,
 136                %remote_opts );
 137
 138my ($_trunk, @_tags, @_branches, $_stdlayout);
 139my %icv;
 140my %init_opts = ( 'template=s' => \$_template, 'shared:s' => \$_shared,
 141                  'trunk|T=s' => \$_trunk, 'tags|t=s@' => \@_tags,
 142                  'branches|b=s@' => \@_branches, 'prefix=s' => \$_prefix,
 143                  'stdlayout|s' => \$_stdlayout,
 144                  'minimize-url|m!' => \$Git::SVN::_minimize_url,
 145                  'no-metadata' => sub { $icv{noMetadata} = 1 },
 146                  'use-svm-props' => sub { $icv{useSvmProps} = 1 },
 147                  'use-svnsync-props' => sub { $icv{useSvnsyncProps} = 1 },
 148                  'rewrite-root=s' => sub { $icv{rewriteRoot} = $_[1] },
 149                  'rewrite-uuid=s' => sub { $icv{rewriteUUID} = $_[1] },
 150                  %remote_opts );
 151my %cmt_opts = ( 'edit|e' => \$_edit,
 152                'rmdir' => \$Git::SVN::Editor::_rmdir,
 153                'find-copies-harder' => \$Git::SVN::Editor::_find_copies_harder,
 154                'l=i' => \$Git::SVN::Editor::_rename_limit,
 155                'copy-similarity|C=i'=> \$Git::SVN::Editor::_cp_similarity
 156);
 157
 158my %cmd = (
 159        fetch => [ \&cmd_fetch, "Download new revisions from SVN",
 160                        { 'revision|r=s' => \$_revision,
 161                          'fetch-all|all' => \$_fetch_all,
 162                          'parent|p' => \$_fetch_parent,
 163                           %fc_opts } ],
 164        clone => [ \&cmd_clone, "Initialize and fetch revisions",
 165                        { 'revision|r=s' => \$_revision,
 166                          'preserve-empty-dirs' =>
 167                                \$Git::SVN::Fetcher::_preserve_empty_dirs,
 168                          'placeholder-filename=s' =>
 169                                \$Git::SVN::Fetcher::_placeholder_filename,
 170                           %fc_opts, %init_opts } ],
 171        init => [ \&cmd_init, "Initialize a repo for tracking" .
 172                          " (requires URL argument)",
 173                          \%init_opts ],
 174        'multi-init' => [ \&cmd_multi_init,
 175                          "Deprecated alias for ".
 176                          "'$0 init -T<trunk> -b<branches> -t<tags>'",
 177                          \%init_opts ],
 178        dcommit => [ \&cmd_dcommit,
 179                     'Commit several diffs to merge with upstream',
 180                        { 'merge|m|M' => \$_merge,
 181                          'strategy|s=s' => \$_strategy,
 182                          'verbose|v' => \$_verbose,
 183                          'dry-run|n' => \$_dry_run,
 184                          'fetch-all|all' => \$_fetch_all,
 185                          'commit-url=s' => \$_commit_url,
 186                          'revision|r=i' => \$_revision,
 187                          'no-rebase' => \$_no_rebase,
 188                          'mergeinfo=s' => \$_merge_info,
 189                          'interactive|i' => \$_interactive,
 190                        %cmt_opts, %fc_opts } ],
 191        branch => [ \&cmd_branch,
 192                    'Create a branch in the SVN repository',
 193                    { 'message|m=s' => \$_message,
 194                      'destination|d=s' => \$_branch_dest,
 195                      'dry-run|n' => \$_dry_run,
 196                      'tag|t' => \$_tag,
 197                      'username=s' => \$Git::SVN::Prompt::_username,
 198                      'commit-url=s' => \$_commit_url } ],
 199        tag => [ sub { $_tag = 1; cmd_branch(@_) },
 200                 'Create a tag in the SVN repository',
 201                 { 'message|m=s' => \$_message,
 202                   'destination|d=s' => \$_branch_dest,
 203                   'dry-run|n' => \$_dry_run,
 204                   'username=s' => \$Git::SVN::Prompt::_username,
 205                   'commit-url=s' => \$_commit_url } ],
 206        'set-tree' => [ \&cmd_set_tree,
 207                        "Set an SVN repository to a git tree-ish",
 208                        { 'stdin' => \$_stdin, %cmt_opts, %fc_opts, } ],
 209        'create-ignore' => [ \&cmd_create_ignore,
 210                             'Create a .gitignore per svn:ignore',
 211                             { 'revision|r=i' => \$_revision
 212                             } ],
 213        'mkdirs' => [ \&cmd_mkdirs ,
 214                      "recreate empty directories after a checkout",
 215                      { 'revision|r=i' => \$_revision } ],
 216        'propget' => [ \&cmd_propget,
 217                       'Print the value of a property on a file or directory',
 218                       { 'revision|r=i' => \$_revision } ],
 219        'proplist' => [ \&cmd_proplist,
 220                       'List all properties of a file or directory',
 221                       { 'revision|r=i' => \$_revision } ],
 222        'show-ignore' => [ \&cmd_show_ignore, "Show svn:ignore listings",
 223                        { 'revision|r=i' => \$_revision
 224                        } ],
 225        'show-externals' => [ \&cmd_show_externals, "Show svn:externals listings",
 226                        { 'revision|r=i' => \$_revision
 227                        } ],
 228        'multi-fetch' => [ \&cmd_multi_fetch,
 229                           "Deprecated alias for $0 fetch --all",
 230                           { 'revision|r=s' => \$_revision, %fc_opts } ],
 231        'migrate' => [ sub { },
 232                       # no-op, we automatically run this anyways,
 233                       'Migrate configuration/metadata/layout from
 234                        previous versions of git-svn',
 235                       { 'minimize' => \$Git::SVN::Migration::_minimize,
 236                         %remote_opts } ],
 237        'log' => [ \&Git::SVN::Log::cmd_show_log, 'Show commit logs',
 238                        { 'limit=i' => \$Git::SVN::Log::limit,
 239                          'revision|r=s' => \$_revision,
 240                          'verbose|v' => \$Git::SVN::Log::verbose,
 241                          'incremental' => \$Git::SVN::Log::incremental,
 242                          'oneline' => \$Git::SVN::Log::oneline,
 243                          'show-commit' => \$Git::SVN::Log::show_commit,
 244                          'non-recursive' => \$Git::SVN::Log::non_recursive,
 245                          'authors-file|A=s' => \$_authors,
 246                          'color' => \$Git::SVN::Log::color,
 247                          'pager=s' => \$Git::SVN::Log::pager
 248                        } ],
 249        'find-rev' => [ \&cmd_find_rev,
 250                        "Translate between SVN revision numbers and tree-ish",
 251                        {} ],
 252        'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
 253                        { 'merge|m|M' => \$_merge,
 254                          'verbose|v' => \$_verbose,
 255                          'strategy|s=s' => \$_strategy,
 256                          'local|l' => \$_local,
 257                          'fetch-all|all' => \$_fetch_all,
 258                          'dry-run|n' => \$_dry_run,
 259                          'preserve-merges|p' => \$_preserve_merges,
 260                          %fc_opts } ],
 261        'commit-diff' => [ \&cmd_commit_diff,
 262                           'Commit a diff between two trees',
 263                        { 'message|m=s' => \$_message,
 264                          'file|F=s' => \$_file,
 265                          'revision|r=s' => \$_revision,
 266                        %cmt_opts } ],
 267        'info' => [ \&cmd_info,
 268                    "Show info about the latest SVN revision
 269                     on the current branch",
 270                    { 'url' => \$_url, } ],
 271        'blame' => [ \&Git::SVN::Log::cmd_blame,
 272                    "Show what revision and author last modified each line of a file",
 273                    { 'git-format' => \$_git_format } ],
 274        'reset' => [ \&cmd_reset,
 275                     "Undo fetches back to the specified SVN revision",
 276                     { 'revision|r=s' => \$_revision,
 277                       'parent|p' => \$_fetch_parent } ],
 278        'gc' => [ \&cmd_gc,
 279                  "Compress unhandled.log files in .git/svn and remove " .
 280                  "index files in .git/svn",
 281                {} ],
 282);
 283
 284use Term::ReadLine;
 285package FakeTerm;
 286sub new {
 287        my ($class, $reason) = @_;
 288        return bless \$reason, shift;
 289}
 290sub readline {
 291        my $self = shift;
 292        die "Cannot use readline on FakeTerm: $$self";
 293}
 294package main;
 295
 296my $term = eval {
 297        $ENV{"GIT_SVN_NOTTY"}
 298                ? new Term::ReadLine 'git-svn', \*STDIN, \*STDOUT
 299                : new Term::ReadLine 'git-svn';
 300};
 301if ($@) {
 302        $term = new FakeTerm "$@: going non-interactive";
 303}
 304
 305my $cmd;
 306for (my $i = 0; $i < @ARGV; $i++) {
 307        if (defined $cmd{$ARGV[$i]}) {
 308                $cmd = $ARGV[$i];
 309                splice @ARGV, $i, 1;
 310                last;
 311        } elsif ($ARGV[$i] eq 'help') {
 312                $cmd = $ARGV[$i+1];
 313                usage(0);
 314        }
 315};
 316
 317# make sure we're always running at the top-level working directory
 318unless ($cmd && $cmd =~ /(?:clone|init|multi-init)$/) {
 319        unless (-d $ENV{GIT_DIR}) {
 320                if ($git_dir_user_set) {
 321                        die "GIT_DIR=$ENV{GIT_DIR} explicitly set, ",
 322                            "but it is not a directory\n";
 323                }
 324                my $git_dir = delete $ENV{GIT_DIR};
 325                my $cdup = undef;
 326                git_cmd_try {
 327                        $cdup = command_oneline(qw/rev-parse --show-cdup/);
 328                        $git_dir = '.' unless ($cdup);
 329                        chomp $cdup if ($cdup);
 330                        $cdup = "." unless ($cdup && length $cdup);
 331                } "Already at toplevel, but $git_dir not found\n";
 332                chdir $cdup or die "Unable to chdir up to '$cdup'\n";
 333                unless (-d $git_dir) {
 334                        die "$git_dir still not found after going to ",
 335                            "'$cdup'\n";
 336                }
 337                $ENV{GIT_DIR} = $git_dir;
 338        }
 339        $_repository = Git->repository(Repository => $ENV{GIT_DIR});
 340}
 341
 342my %opts = %{$cmd{$cmd}->[2]} if (defined $cmd);
 343
 344read_git_config(\%opts);
 345if ($cmd && ($cmd eq 'log' || $cmd eq 'blame')) {
 346        Getopt::Long::Configure('pass_through');
 347}
 348my $rv = GetOptions(%opts, 'h|H' => \$_help, 'version|V' => \$_version,
 349                    'minimize-connections' => \$Git::SVN::Migration::_minimize,
 350                    'id|i=s' => \$Git::SVN::default_ref_id,
 351                    'svn-remote|remote|R=s' => sub {
 352                       $Git::SVN::no_reuse_existing = 1;
 353                       $Git::SVN::default_repo_id = $_[1] });
 354exit 1 if (!$rv && $cmd && $cmd ne 'log');
 355
 356usage(0) if $_help;
 357version() if $_version;
 358usage(1) unless defined $cmd;
 359load_authors() if $_authors;
 360if (defined $_authors_prog) {
 361        $_authors_prog = "'" . File::Spec->rel2abs($_authors_prog) . "'";
 362}
 363
 364unless ($cmd =~ /^(?:clone|init|multi-init|commit-diff)$/) {
 365        Git::SVN::Migration::migration_check();
 366}
 367Git::SVN::init_vars();
 368eval {
 369        Git::SVN::verify_remotes_sanity();
 370        $cmd{$cmd}->[0]->(@ARGV);
 371};
 372fatal $@ if $@;
 373post_fetch_checkout();
 374exit 0;
 375
 376####################### primary functions ######################
 377sub usage {
 378        my $exit = shift || 0;
 379        my $fd = $exit ? \*STDERR : \*STDOUT;
 380        print $fd <<"";
 381git-svn - bidirectional operations between a single Subversion tree and git
 382Usage: git svn <command> [options] [arguments]\n
 383
 384        print $fd "Available commands:\n" unless $cmd;
 385
 386        foreach (sort keys %cmd) {
 387                next if $cmd && $cmd ne $_;
 388                next if /^multi-/; # don't show deprecated commands
 389                print $fd '  ',pack('A17',$_),$cmd{$_}->[1],"\n";
 390                foreach (sort keys %{$cmd{$_}->[2]}) {
 391                        # mixed-case options are for .git/config only
 392                        next if /[A-Z]/ && /^[a-z]+$/i;
 393                        # prints out arguments as they should be passed:
 394                        my $x = s#[:=]s$## ? '<arg>' : s#[:=]i$## ? '<num>' : '';
 395                        print $fd ' ' x 21, join(', ', map { length $_ > 1 ?
 396                                                        "--$_" : "-$_" }
 397                                                split /\|/,$_)," $x\n";
 398                }
 399        }
 400        print $fd <<"";
 401\nGIT_SVN_ID may be set in the environment or via the --id/-i switch to an
 402arbitrary identifier if you're tracking multiple SVN branches/repositories in
 403one git repository and want to keep them separate.  See git-svn(1) for more
 404information.
 405
 406        exit $exit;
 407}
 408
 409sub version {
 410        ::_req_svn();
 411        print "git-svn version $VERSION (svn $SVN::Core::VERSION)\n";
 412        exit 0;
 413}
 414
 415sub ask {
 416        my ($prompt, %arg) = @_;
 417        my $valid_re = $arg{valid_re};
 418        my $default = $arg{default};
 419        my $resp;
 420        my $i = 0;
 421
 422        if ( !( defined($term->IN)
 423            && defined( fileno($term->IN) )
 424            && defined( $term->OUT )
 425            && defined( fileno($term->OUT) ) ) ){
 426                return defined($default) ? $default : undef;
 427        }
 428
 429        while ($i++ < 10) {
 430                $resp = $term->readline($prompt);
 431                if (!defined $resp) { # EOF
 432                        print "\n";
 433                        return defined $default ? $default : undef;
 434                }
 435                if ($resp eq '' and defined $default) {
 436                        return $default;
 437                }
 438                if (!defined $valid_re or $resp =~ /$valid_re/) {
 439                        return $resp;
 440                }
 441        }
 442        return undef;
 443}
 444
 445sub do_git_init_db {
 446        unless (-d $ENV{GIT_DIR}) {
 447                my @init_db = ('init');
 448                push @init_db, "--template=$_template" if defined $_template;
 449                if (defined $_shared) {
 450                        if ($_shared =~ /[a-z]/) {
 451                                push @init_db, "--shared=$_shared";
 452                        } else {
 453                                push @init_db, "--shared";
 454                        }
 455                }
 456                command_noisy(@init_db);
 457                $_repository = Git->repository(Repository => ".git");
 458        }
 459        my $set;
 460        my $pfx = "svn-remote.$Git::SVN::default_repo_id";
 461        foreach my $i (keys %icv) {
 462                die "'$set' and '$i' cannot both be set\n" if $set;
 463                next unless defined $icv{$i};
 464                command_noisy('config', "$pfx.$i", $icv{$i});
 465                $set = $i;
 466        }
 467        my $ignore_paths_regex = \$Git::SVN::Fetcher::_ignore_regex;
 468        command_noisy('config', "$pfx.ignore-paths", $$ignore_paths_regex)
 469                if defined $$ignore_paths_regex;
 470        my $ignore_refs_regex = \$Git::SVN::Ra::_ignore_refs_regex;
 471        command_noisy('config', "$pfx.ignore-refs", $$ignore_refs_regex)
 472                if defined $$ignore_refs_regex;
 473
 474        if (defined $Git::SVN::Fetcher::_preserve_empty_dirs) {
 475                my $fname = \$Git::SVN::Fetcher::_placeholder_filename;
 476                command_noisy('config', "$pfx.preserve-empty-dirs", 'true');
 477                command_noisy('config', "$pfx.placeholder-filename", $$fname);
 478        }
 479}
 480
 481sub init_subdir {
 482        my $repo_path = shift or return;
 483        mkpath([$repo_path]) unless -d $repo_path;
 484        chdir $repo_path or die "Couldn't chdir to $repo_path: $!\n";
 485        $ENV{GIT_DIR} = '.git';
 486        $_repository = Git->repository(Repository => $ENV{GIT_DIR});
 487}
 488
 489sub cmd_clone {
 490        my ($url, $path) = @_;
 491        if (!defined $path &&
 492            (defined $_trunk || @_branches || @_tags ||
 493             defined $_stdlayout) &&
 494            $url !~ m#^[a-z\+]+://#) {
 495                $path = $url;
 496        }
 497        $path = basename($url) if !defined $path || !length $path;
 498        my $authors_absolute = $_authors ? File::Spec->rel2abs($_authors) : "";
 499        cmd_init($url, $path);
 500        command_oneline('config', 'svn.authorsfile', $authors_absolute)
 501            if $_authors;
 502        Git::SVN::fetch_all($Git::SVN::default_repo_id);
 503}
 504
 505sub cmd_init {
 506        if (defined $_stdlayout) {
 507                $_trunk = 'trunk' if (!defined $_trunk);
 508                @_tags = 'tags' if (! @_tags);
 509                @_branches = 'branches' if (! @_branches);
 510        }
 511        if (defined $_trunk || @_branches || @_tags) {
 512                return cmd_multi_init(@_);
 513        }
 514        my $url = shift or die "SVN repository location required ",
 515                               "as a command-line argument\n";
 516        $url = canonicalize_url($url);
 517        init_subdir(@_);
 518        do_git_init_db();
 519
 520        if ($Git::SVN::_minimize_url eq 'unset') {
 521                $Git::SVN::_minimize_url = 0;
 522        }
 523
 524        Git::SVN->init($url);
 525}
 526
 527sub cmd_fetch {
 528        if (grep /^\d+=./, @_) {
 529                die "'<rev>=<commit>' fetch arguments are ",
 530                    "no longer supported.\n";
 531        }
 532        my ($remote) = @_;
 533        if (@_ > 1) {
 534                die "Usage: $0 fetch [--all] [--parent] [svn-remote]\n";
 535        }
 536        $Git::SVN::no_reuse_existing = undef;
 537        if ($_fetch_parent) {
 538                my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
 539                unless ($gs) {
 540                        die "Unable to determine upstream SVN information from ",
 541                            "working tree history\n";
 542                }
 543                # just fetch, don't checkout.
 544                $_no_checkout = 'true';
 545                $_fetch_all ? $gs->fetch_all : $gs->fetch;
 546        } elsif ($_fetch_all) {
 547                cmd_multi_fetch();
 548        } else {
 549                $remote ||= $Git::SVN::default_repo_id;
 550                Git::SVN::fetch_all($remote, Git::SVN::read_all_remotes());
 551        }
 552}
 553
 554sub cmd_set_tree {
 555        my (@commits) = @_;
 556        if ($_stdin || !@commits) {
 557                print "Reading from stdin...\n";
 558                @commits = ();
 559                while (<STDIN>) {
 560                        if (/\b($sha1_short)\b/o) {
 561                                unshift @commits, $1;
 562                        }
 563                }
 564        }
 565        my @revs;
 566        foreach my $c (@commits) {
 567                my @tmp = command('rev-parse',$c);
 568                if (scalar @tmp == 1) {
 569                        push @revs, $tmp[0];
 570                } elsif (scalar @tmp > 1) {
 571                        push @revs, reverse(command('rev-list',@tmp));
 572                } else {
 573                        fatal "Failed to rev-parse $c";
 574                }
 575        }
 576        my $gs = Git::SVN->new;
 577        my ($r_last, $cmt_last) = $gs->last_rev_commit;
 578        $gs->fetch;
 579        if (defined $gs->{last_rev} && $r_last != $gs->{last_rev}) {
 580                fatal "There are new revisions that were fetched ",
 581                      "and need to be merged (or acknowledged) ",
 582                      "before committing.\nlast rev: $r_last\n",
 583                      " current: $gs->{last_rev}";
 584        }
 585        $gs->set_tree($_) foreach @revs;
 586        print "Done committing ",scalar @revs," revisions to SVN\n";
 587        unlink $gs->{index};
 588}
 589
 590sub split_merge_info_range {
 591        my ($range) = @_;
 592        if ($range =~ /(\d+)-(\d+)/) {
 593                return (int($1), int($2));
 594        } else {
 595                return (int($range), int($range));
 596        }
 597}
 598
 599sub combine_ranges {
 600        my ($in) = @_;
 601
 602        my @fnums = ();
 603        my @arr = split(/,/, $in);
 604        for my $element (@arr) {
 605                my ($start, $end) = split_merge_info_range($element);
 606                push @fnums, $start;
 607        }
 608
 609        my @sorted = @arr [ sort {
 610                $fnums[$a] <=> $fnums[$b]
 611        } 0..$#arr ];
 612
 613        my @return = ();
 614        my $last = -1;
 615        my $first = -1;
 616        for my $element (@sorted) {
 617                my ($start, $end) = split_merge_info_range($element);
 618
 619                if ($last == -1) {
 620                        $first = $start;
 621                        $last = $end;
 622                        next;
 623                }
 624                if ($start <= $last+1) {
 625                        if ($end > $last) {
 626                                $last = $end;
 627                        }
 628                        next;
 629                }
 630                if ($first == $last) {
 631                        push @return, "$first";
 632                } else {
 633                        push @return, "$first-$last";
 634                }
 635                $first = $start;
 636                $last = $end;
 637        }
 638
 639        if ($first != -1) {
 640                if ($first == $last) {
 641                        push @return, "$first";
 642                } else {
 643                        push @return, "$first-$last";
 644                }
 645        }
 646
 647        return join(',', @return);
 648}
 649
 650sub merge_revs_into_hash {
 651        my ($hash, $minfo) = @_;
 652        my @lines = split(' ', $minfo);
 653
 654        for my $line (@lines) {
 655                my ($branchpath, $revs) = split(/:/, $line);
 656
 657                if (exists($hash->{$branchpath})) {
 658                        # Merge the two revision sets
 659                        my $combined = "$hash->{$branchpath},$revs";
 660                        $hash->{$branchpath} = combine_ranges($combined);
 661                } else {
 662                        # Just do range combining for consolidation
 663                        $hash->{$branchpath} = combine_ranges($revs);
 664                }
 665        }
 666}
 667
 668sub merge_merge_info {
 669        my ($mergeinfo_one, $mergeinfo_two) = @_;
 670        my %result_hash = ();
 671
 672        merge_revs_into_hash(\%result_hash, $mergeinfo_one);
 673        merge_revs_into_hash(\%result_hash, $mergeinfo_two);
 674
 675        my $result = '';
 676        # Sort below is for consistency's sake
 677        for my $branchname (sort keys(%result_hash)) {
 678                my $revlist = $result_hash{$branchname};
 679                $result .= "$branchname:$revlist\n"
 680        }
 681        return $result;
 682}
 683
 684sub populate_merge_info {
 685        my ($d, $gs, $uuid, $linear_refs, $rewritten_parent) = @_;
 686
 687        my %parentshash;
 688        read_commit_parents(\%parentshash, $d);
 689        my @parents = @{$parentshash{$d}};
 690        if ($#parents > 0) {
 691                # Merge commit
 692                my $all_parents_ok = 1;
 693                my $aggregate_mergeinfo = '';
 694                my $rooturl = $gs->repos_root;
 695
 696                if (defined($rewritten_parent)) {
 697                        # Replace first parent with newly-rewritten version
 698                        shift @parents;
 699                        unshift @parents, $rewritten_parent;
 700                }
 701
 702                foreach my $parent (@parents) {
 703                        my ($branchurl, $svnrev, $paruuid) =
 704                                cmt_metadata($parent);
 705
 706                        unless (defined($svnrev)) {
 707                                # Should have been caught be preflight check
 708                                fatal "merge commit $d has ancestor $parent, but that change "
 709                     ."does not have git-svn metadata!";
 710                        }
 711                        unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
 712                                fatal "commit $parent git-svn metadata changed mid-run!";
 713                        }
 714                        my $branchpath = $1;
 715
 716                        my $ra = Git::SVN::Ra->new($branchurl);
 717                        my (undef, undef, $props) =
 718                                $ra->get_dir(canonicalize_path("."), $svnrev);
 719                        my $par_mergeinfo = $props->{'svn:mergeinfo'};
 720                        unless (defined $par_mergeinfo) {
 721                                $par_mergeinfo = '';
 722                        }
 723                        # Merge previous mergeinfo values
 724                        $aggregate_mergeinfo =
 725                                merge_merge_info($aggregate_mergeinfo,
 726                                                                 $par_mergeinfo, 0);
 727
 728                        next if $parent eq $parents[0]; # Skip first parent
 729                        # Add new changes being placed in tree by merge
 730                        my @cmd = (qw/rev-list --reverse/,
 731                                           $parent, qw/--not/);
 732                        foreach my $par (@parents) {
 733                                unless ($par eq $parent) {
 734                                        push @cmd, $par;
 735                                }
 736                        }
 737                        my @revsin = ();
 738                        my ($revlist, $ctx) = command_output_pipe(@cmd);
 739                        while (<$revlist>) {
 740                                my $irev = $_;
 741                                chomp $irev;
 742                                my (undef, $csvnrev, undef) =
 743                                        cmt_metadata($irev);
 744                                unless (defined $csvnrev) {
 745                                        # A child is missing SVN annotations...
 746                                        # this might be OK, or might not be.
 747                                        warn "W:child $irev is merged into revision "
 748                                                 ."$d but does not have git-svn metadata. "
 749                                                 ."This means git-svn cannot determine the "
 750                                                 ."svn revision numbers to place into the "
 751                                                 ."svn:mergeinfo property. You must ensure "
 752                                                 ."a branch is entirely committed to "
 753                                                 ."SVN before merging it in order for "
 754                                                 ."svn:mergeinfo population to function "
 755                                                 ."properly";
 756                                }
 757                                push @revsin, $csvnrev;
 758                        }
 759                        command_close_pipe($revlist, $ctx);
 760
 761                        last unless $all_parents_ok;
 762
 763                        # We now have a list of all SVN revnos which are
 764                        # merged by this particular parent. Integrate them.
 765                        next if $#revsin == -1;
 766                        my $newmergeinfo = "$branchpath:" . join(',', @revsin);
 767                        $aggregate_mergeinfo =
 768                                merge_merge_info($aggregate_mergeinfo,
 769                                                                 $newmergeinfo, 1);
 770                }
 771                if ($all_parents_ok and $aggregate_mergeinfo) {
 772                        return $aggregate_mergeinfo;
 773                }
 774        }
 775
 776        return undef;
 777}
 778
 779sub cmd_dcommit {
 780        my $head = shift;
 781        command_noisy(qw/update-index --refresh/);
 782        git_cmd_try { command_oneline(qw/diff-index --quiet HEAD/) }
 783                'Cannot dcommit with a dirty index.  Commit your changes first, '
 784                . "or stash them with `git stash'.\n";
 785        $head ||= 'HEAD';
 786
 787        my $old_head;
 788        if ($head ne 'HEAD') {
 789                $old_head = eval {
 790                        command_oneline([qw/symbolic-ref -q HEAD/])
 791                };
 792                if ($old_head) {
 793                        $old_head =~ s{^refs/heads/}{};
 794                } else {
 795                        $old_head = eval { command_oneline(qw/rev-parse HEAD/) };
 796                }
 797                command(['checkout', $head], STDERR => 0);
 798        }
 799
 800        my @refs;
 801        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD', \@refs);
 802        unless ($gs) {
 803                die "Unable to determine upstream SVN information from ",
 804                    "$head history.\nPerhaps the repository is empty.";
 805        }
 806
 807        if (defined $_commit_url) {
 808                $url = $_commit_url;
 809        } else {
 810                $url = eval { command_oneline('config', '--get',
 811                              "svn-remote.$gs->{repo_id}.commiturl") };
 812                if (!$url) {
 813                        $url = $gs->full_pushurl
 814                }
 815        }
 816
 817        my $last_rev = $_revision if defined $_revision;
 818        if ($url) {
 819                print "Committing to $url ...\n";
 820        }
 821        my ($linear_refs, $parents) = linearize_history($gs, \@refs);
 822        if ($_no_rebase && scalar(@$linear_refs) > 1) {
 823                warn "Attempting to commit more than one change while ",
 824                     "--no-rebase is enabled.\n",
 825                     "If these changes depend on each other, re-running ",
 826                     "without --no-rebase may be required."
 827        }
 828
 829        if (defined $_interactive){
 830                my $ask_default = "y";
 831                foreach my $d (@$linear_refs){
 832                        my ($fh, $ctx) = command_output_pipe(qw(show --summary), "$d");
 833                        while (<$fh>){
 834                                print $_;
 835                        }
 836                        command_close_pipe($fh, $ctx);
 837                        $_ = ask("Commit this patch to SVN? ([y]es (default)|[n]o|[q]uit|[a]ll): ",
 838                                 valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
 839                                 default => $ask_default);
 840                        die "Commit this patch reply required" unless defined $_;
 841                        if (/^[nq]/i) {
 842                                exit(0);
 843                        } elsif (/^a/i) {
 844                                last;
 845                        }
 846                }
 847        }
 848
 849        my $expect_url = $url;
 850
 851        my $push_merge_info = eval {
 852                command_oneline(qw/config --get svn.pushmergeinfo/)
 853                };
 854        if (not defined($push_merge_info)
 855                        or $push_merge_info eq "false"
 856                        or $push_merge_info eq "no"
 857                        or $push_merge_info eq "never") {
 858                $push_merge_info = 0;
 859        }
 860
 861        unless (defined($_merge_info) || ! $push_merge_info) {
 862                # Preflight check of changes to ensure no issues with mergeinfo
 863                # This includes check for uncommitted-to-SVN parents
 864                # (other than the first parent, which we will handle),
 865                # information from different SVN repos, and paths
 866                # which are not underneath this repository root.
 867                my $rooturl = $gs->repos_root;
 868                foreach my $d (@$linear_refs) {
 869                        my %parentshash;
 870                        read_commit_parents(\%parentshash, $d);
 871                        my @realparents = @{$parentshash{$d}};
 872                        if ($#realparents > 0) {
 873                                # Merge commit
 874                                shift @realparents; # Remove/ignore first parent
 875                                foreach my $parent (@realparents) {
 876                                        my ($branchurl, $svnrev, $paruuid) = cmt_metadata($parent);
 877                                        unless (defined $paruuid) {
 878                                                # A parent is missing SVN annotations...
 879                                                # abort the whole operation.
 880                                                fatal "$parent is merged into revision $d, "
 881                                                         ."but does not have git-svn metadata. "
 882                                                         ."Either dcommit the branch or use a "
 883                                                         ."local cherry-pick, FF merge, or rebase "
 884                                                         ."instead of an explicit merge commit.";
 885                                        }
 886
 887                                        unless ($paruuid eq $uuid) {
 888                                                # Parent has SVN metadata from different repository
 889                                                fatal "merge parent $parent for change $d has "
 890                                                         ."git-svn uuid $paruuid, while current change "
 891                                                         ."has uuid $uuid!";
 892                                        }
 893
 894                                        unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
 895                                                # This branch is very strange indeed.
 896                                                fatal "merge parent $parent for $d is on branch "
 897                                                         ."$branchurl, which is not under the "
 898                                                         ."git-svn root $rooturl!";
 899                                        }
 900                                }
 901                        }
 902                }
 903        }
 904
 905        my $rewritten_parent;
 906        Git::SVN::remove_username($expect_url);
 907        if (defined($_merge_info)) {
 908                $_merge_info =~ tr{ }{\n};
 909        }
 910        while (1) {
 911                my $d = shift @$linear_refs or last;
 912                unless (defined $last_rev) {
 913                        (undef, $last_rev, undef) = cmt_metadata("$d~1");
 914                        unless (defined $last_rev) {
 915                                fatal "Unable to extract revision information ",
 916                                      "from commit $d~1";
 917                        }
 918                }
 919                if ($_dry_run) {
 920                        print "diff-tree $d~1 $d\n";
 921                } else {
 922                        my $cmt_rev;
 923
 924                        unless (defined($_merge_info) || ! $push_merge_info) {
 925                                $_merge_info = populate_merge_info($d, $gs,
 926                                                             $uuid,
 927                                                             $linear_refs,
 928                                                             $rewritten_parent);
 929                        }
 930
 931                        my %ed_opts = ( r => $last_rev,
 932                                        log => get_commit_entry($d)->{log},
 933                                        ra => Git::SVN::Ra->new($url),
 934                                        config => SVN::Core::config_get_config(
 935                                                $Git::SVN::Ra::config_dir
 936                                        ),
 937                                        tree_a => "$d~1",
 938                                        tree_b => $d,
 939                                        editor_cb => sub {
 940                                               print "Committed r$_[0]\n";
 941                                               $cmt_rev = $_[0];
 942                                        },
 943                                        mergeinfo => $_merge_info,
 944                                        svn_path => '');
 945                        if (!Git::SVN::Editor->new(\%ed_opts)->apply_diff) {
 946                                print "No changes\n$d~1 == $d\n";
 947                        } elsif ($parents->{$d} && @{$parents->{$d}}) {
 948                                $gs->{inject_parents_dcommit}->{$cmt_rev} =
 949                                                               $parents->{$d};
 950                        }
 951                        $_fetch_all ? $gs->fetch_all : $gs->fetch;
 952                        $last_rev = $cmt_rev;
 953                        next if $_no_rebase;
 954
 955                        # we always want to rebase against the current HEAD,
 956                        # not any head that was passed to us
 957                        my @diff = command('diff-tree', $d,
 958                                           $gs->refname, '--');
 959                        my @finish;
 960                        if (@diff) {
 961                                @finish = rebase_cmd();
 962                                print STDERR "W: $d and ", $gs->refname,
 963                                             " differ, using @finish:\n",
 964                                             join("\n", @diff), "\n";
 965                        } else {
 966                                print "No changes between current HEAD and ",
 967                                      $gs->refname,
 968                                      "\nResetting to the latest ",
 969                                      $gs->refname, "\n";
 970                                @finish = qw/reset --mixed/;
 971                        }
 972                        command_noisy(@finish, $gs->refname);
 973
 974                        $rewritten_parent = command_oneline(qw/rev-parse HEAD/);
 975
 976                        if (@diff) {
 977                                @refs = ();
 978                                my ($url_, $rev_, $uuid_, $gs_) =
 979                                              working_head_info('HEAD', \@refs);
 980                                my ($linear_refs_, $parents_) =
 981                                              linearize_history($gs_, \@refs);
 982                                if (scalar(@$linear_refs) !=
 983                                    scalar(@$linear_refs_)) {
 984                                        fatal "# of revisions changed ",
 985                                          "\nbefore:\n",
 986                                          join("\n", @$linear_refs),
 987                                          "\n\nafter:\n",
 988                                          join("\n", @$linear_refs_), "\n",
 989                                          'If you are attempting to commit ',
 990                                          "merges, try running:\n\t",
 991                                          'git rebase --interactive',
 992                                          '--preserve-merges ',
 993                                          $gs->refname,
 994                                          "\nBefore dcommitting";
 995                                }
 996                                if ($url_ ne $expect_url) {
 997                                        if ($url_ eq $gs->metadata_url) {
 998                                                print
 999                                                  "Accepting rewritten URL:",
1000                                                  " $url_\n";
1001                                        } else {
1002                                                fatal
1003                                                  "URL mismatch after rebase:",
1004                                                  " $url_ != $expect_url";
1005                                        }
1006                                }
1007                                if ($uuid_ ne $uuid) {
1008                                        fatal "uuid mismatch after rebase: ",
1009                                              "$uuid_ != $uuid";
1010                                }
1011                                # remap parents
1012                                my (%p, @l, $i);
1013                                for ($i = 0; $i < scalar @$linear_refs; $i++) {
1014                                        my $new = $linear_refs_->[$i] or next;
1015                                        $p{$new} =
1016                                                $parents->{$linear_refs->[$i]};
1017                                        push @l, $new;
1018                                }
1019                                $parents = \%p;
1020                                $linear_refs = \@l;
1021                        }
1022                }
1023        }
1024
1025        if ($old_head) {
1026                my $new_head = command_oneline(qw/rev-parse HEAD/);
1027                my $new_is_symbolic = eval {
1028                        command_oneline(qw/symbolic-ref -q HEAD/);
1029                };
1030                if ($new_is_symbolic) {
1031                        print "dcommitted the branch ", $head, "\n";
1032                } else {
1033                        print "dcommitted on a detached HEAD because you gave ",
1034                              "a revision argument.\n",
1035                              "The rewritten commit is: ", $new_head, "\n";
1036                }
1037                command(['checkout', $old_head], STDERR => 0);
1038        }
1039
1040        unlink $gs->{index};
1041}
1042
1043sub cmd_branch {
1044        my ($branch_name, $head) = @_;
1045
1046        unless (defined $branch_name && length $branch_name) {
1047                die(($_tag ? "tag" : "branch") . " name required\n");
1048        }
1049        $head ||= 'HEAD';
1050
1051        my (undef, $rev, undef, $gs) = working_head_info($head);
1052        my $src = $gs->full_pushurl;
1053
1054        my $remote = Git::SVN::read_all_remotes()->{$gs->{repo_id}};
1055        my $allglobs = $remote->{ $_tag ? 'tags' : 'branches' };
1056        my $glob;
1057        if ($#{$allglobs} == 0) {
1058                $glob = $allglobs->[0];
1059        } else {
1060                unless(defined $_branch_dest) {
1061                        die "Multiple ",
1062                            $_tag ? "tag" : "branch",
1063                            " paths defined for Subversion repository.\n",
1064                            "You must specify where you want to create the ",
1065                            $_tag ? "tag" : "branch",
1066                            " with the --destination argument.\n";
1067                }
1068                foreach my $g (@{$allglobs}) {
1069                        # Git::SVN::Editor could probably be moved to Git.pm..
1070                        my $re = Git::SVN::Editor::glob2pat($g->{path}->{left});
1071                        if ($_branch_dest =~ /$re/) {
1072                                $glob = $g;
1073                                last;
1074                        }
1075                }
1076                unless (defined $glob) {
1077                        my $dest_re = qr/\b\Q$_branch_dest\E\b/;
1078                        foreach my $g (@{$allglobs}) {
1079                                $g->{path}->{left} =~ /$dest_re/ or next;
1080                                if (defined $glob) {
1081                                        die "Ambiguous destination: ",
1082                                            $_branch_dest, "\nmatches both '",
1083                                            $glob->{path}->{left}, "' and '",
1084                                            $g->{path}->{left}, "'\n";
1085                                }
1086                                $glob = $g;
1087                        }
1088                        unless (defined $glob) {
1089                                die "Unknown ",
1090                                    $_tag ? "tag" : "branch",
1091                                    " destination $_branch_dest\n";
1092                        }
1093                }
1094        }
1095        my ($lft, $rgt) = @{ $glob->{path} }{qw/left right/};
1096        my $url;
1097        if (defined $_commit_url) {
1098                $url = $_commit_url;
1099        } else {
1100                $url = eval { command_oneline('config', '--get',
1101                        "svn-remote.$gs->{repo_id}.commiturl") };
1102                if (!$url) {
1103                        $url = $remote->{pushurl} || $remote->{url};
1104                }
1105        }
1106        my $dst = join '/', $url, $lft, $branch_name, ($rgt || ());
1107
1108        if ($dst =~ /^https:/ && $src =~ /^http:/) {
1109                $src=~s/^http:/https:/;
1110        }
1111
1112        ::_req_svn();
1113
1114        my $ctx = SVN::Client->new(
1115                auth    => Git::SVN::Ra::_auth_providers(),
1116                log_msg => sub {
1117                        ${ $_[0] } = defined $_message
1118                                ? $_message
1119                                : 'Create ' . ($_tag ? 'tag ' : 'branch ' )
1120                                . $branch_name;
1121                },
1122        );
1123
1124        eval {
1125                $ctx->ls($dst, 'HEAD', 0);
1126        } and die "branch ${branch_name} already exists\n";
1127
1128        print "Copying ${src} at r${rev} to ${dst}...\n";
1129        $ctx->copy($src, $rev, $dst)
1130                unless $_dry_run;
1131
1132        $gs->fetch_all;
1133}
1134
1135sub cmd_find_rev {
1136        my $revision_or_hash = shift or die "SVN or git revision required ",
1137                                            "as a command-line argument\n";
1138        my $result;
1139        if ($revision_or_hash =~ /^r\d+$/) {
1140                my $head = shift;
1141                $head ||= 'HEAD';
1142                my @refs;
1143                my (undef, undef, $uuid, $gs) = working_head_info($head, \@refs);
1144                unless ($gs) {
1145                        die "Unable to determine upstream SVN information from ",
1146                            "$head history\n";
1147                }
1148                my $desired_revision = substr($revision_or_hash, 1);
1149                $result = $gs->rev_map_get($desired_revision, $uuid);
1150        } else {
1151                my (undef, $rev, undef) = cmt_metadata($revision_or_hash);
1152                $result = $rev;
1153        }
1154        print "$result\n" if $result;
1155}
1156
1157sub auto_create_empty_directories {
1158        my ($gs) = @_;
1159        my $var = eval { command_oneline('config', '--get', '--bool',
1160                                         "svn-remote.$gs->{repo_id}.automkdirs") };
1161        # By default, create empty directories by consulting the unhandled log,
1162        # but allow setting it to 'false' to skip it.
1163        return !($var && $var eq 'false');
1164}
1165
1166sub cmd_rebase {
1167        command_noisy(qw/update-index --refresh/);
1168        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1169        unless ($gs) {
1170                die "Unable to determine upstream SVN information from ",
1171                    "working tree history\n";
1172        }
1173        if ($_dry_run) {
1174                print "Remote Branch: " . $gs->refname . "\n";
1175                print "SVN URL: " . $url . "\n";
1176                return;
1177        }
1178        if (command(qw/diff-index HEAD --/)) {
1179                print STDERR "Cannot rebase with uncommited changes:\n";
1180                command_noisy('status');
1181                exit 1;
1182        }
1183        unless ($_local) {
1184                # rebase will checkout for us, so no need to do it explicitly
1185                $_no_checkout = 'true';
1186                $_fetch_all ? $gs->fetch_all : $gs->fetch;
1187        }
1188        command_noisy(rebase_cmd(), $gs->refname);
1189        if (auto_create_empty_directories($gs)) {
1190                $gs->mkemptydirs;
1191        }
1192}
1193
1194sub cmd_show_ignore {
1195        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1196        $gs ||= Git::SVN->new;
1197        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1198        $gs->prop_walk($gs->{path}, $r, sub {
1199                my ($gs, $path, $props) = @_;
1200                print STDOUT "\n# $path\n";
1201                my $s = $props->{'svn:ignore'} or return;
1202                $s =~ s/[\r\n]+/\n/g;
1203                $s =~ s/^\n+//;
1204                chomp $s;
1205                $s =~ s#^#$path#gm;
1206                print STDOUT "$s\n";
1207        });
1208}
1209
1210sub cmd_show_externals {
1211        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1212        $gs ||= Git::SVN->new;
1213        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1214        $gs->prop_walk($gs->{path}, $r, sub {
1215                my ($gs, $path, $props) = @_;
1216                print STDOUT "\n# $path\n";
1217                my $s = $props->{'svn:externals'} or return;
1218                $s =~ s/[\r\n]+/\n/g;
1219                chomp $s;
1220                $s =~ s#^#$path#gm;
1221                print STDOUT "$s\n";
1222        });
1223}
1224
1225sub cmd_create_ignore {
1226        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1227        $gs ||= Git::SVN->new;
1228        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1229        $gs->prop_walk($gs->{path}, $r, sub {
1230                my ($gs, $path, $props) = @_;
1231                # $path is of the form /path/to/dir/
1232                $path = '.' . $path;
1233                # SVN can have attributes on empty directories,
1234                # which git won't track
1235                mkpath([$path]) unless -d $path;
1236                my $ignore = $path . '.gitignore';
1237                my $s = $props->{'svn:ignore'} or return;
1238                open(GITIGNORE, '>', $ignore)
1239                  or fatal("Failed to open `$ignore' for writing: $!");
1240                $s =~ s/[\r\n]+/\n/g;
1241                $s =~ s/^\n+//;
1242                chomp $s;
1243                # Prefix all patterns so that the ignore doesn't apply
1244                # to sub-directories.
1245                $s =~ s#^#/#gm;
1246                print GITIGNORE "$s\n";
1247                close(GITIGNORE)
1248                  or fatal("Failed to close `$ignore': $!");
1249                command_noisy('add', '-f', $ignore);
1250        });
1251}
1252
1253sub cmd_mkdirs {
1254        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1255        $gs ||= Git::SVN->new;
1256        $gs->mkemptydirs($_revision);
1257}
1258
1259sub canonicalize_path {
1260        my ($path) = @_;
1261        my $dot_slash_added = 0;
1262        if (substr($path, 0, 1) ne "/") {
1263                $path = "./" . $path;
1264                $dot_slash_added = 1;
1265        }
1266        # File::Spec->canonpath doesn't collapse x/../y into y (for a
1267        # good reason), so let's do this manually.
1268        $path =~ s#/+#/#g;
1269        $path =~ s#/\.(?:/|$)#/#g;
1270        $path =~ s#/[^/]+/\.\.##g;
1271        $path =~ s#/$##g;
1272        $path =~ s#^\./## if $dot_slash_added;
1273        $path =~ s#^/##;
1274        $path =~ s#^\.$##;
1275        return $path;
1276}
1277
1278sub canonicalize_url {
1279        my ($url) = @_;
1280        $url =~ s#^([^:]+://[^/]*/)(.*)$#$1 . canonicalize_path($2)#e;
1281        return $url;
1282}
1283
1284# get_svnprops(PATH)
1285# ------------------
1286# Helper for cmd_propget and cmd_proplist below.
1287sub get_svnprops {
1288        my $path = shift;
1289        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1290        $gs ||= Git::SVN->new;
1291
1292        # prefix THE PATH by the sub-directory from which the user
1293        # invoked us.
1294        $path = $cmd_dir_prefix . $path;
1295        fatal("No such file or directory: $path") unless -e $path;
1296        my $is_dir = -d $path ? 1 : 0;
1297        $path = $gs->{path} . '/' . $path;
1298
1299        # canonicalize the path (otherwise libsvn will abort or fail to
1300        # find the file)
1301        $path = canonicalize_path($path);
1302
1303        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1304        my $props;
1305        if ($is_dir) {
1306                (undef, undef, $props) = $gs->ra->get_dir($path, $r);
1307        }
1308        else {
1309                (undef, $props) = $gs->ra->get_file($path, $r, undef);
1310        }
1311        return $props;
1312}
1313
1314# cmd_propget (PROP, PATH)
1315# ------------------------
1316# Print the SVN property PROP for PATH.
1317sub cmd_propget {
1318        my ($prop, $path) = @_;
1319        $path = '.' if not defined $path;
1320        usage(1) if not defined $prop;
1321        my $props = get_svnprops($path);
1322        if (not defined $props->{$prop}) {
1323                fatal("`$path' does not have a `$prop' SVN property.");
1324        }
1325        print $props->{$prop} . "\n";
1326}
1327
1328# cmd_proplist (PATH)
1329# -------------------
1330# Print the list of SVN properties for PATH.
1331sub cmd_proplist {
1332        my $path = shift;
1333        $path = '.' if not defined $path;
1334        my $props = get_svnprops($path);
1335        print "Properties on '$path':\n";
1336        foreach (sort keys %{$props}) {
1337                print "  $_\n";
1338        }
1339}
1340
1341sub cmd_multi_init {
1342        my $url = shift;
1343        unless (defined $_trunk || @_branches || @_tags) {
1344                usage(1);
1345        }
1346
1347        $_prefix = '' unless defined $_prefix;
1348        if (defined $url) {
1349                $url = canonicalize_url($url);
1350                init_subdir(@_);
1351        }
1352        do_git_init_db();
1353        if (defined $_trunk) {
1354                $_trunk =~ s#^/+##;
1355                my $trunk_ref = 'refs/remotes/' . $_prefix . 'trunk';
1356                # try both old-style and new-style lookups:
1357                my $gs_trunk = eval { Git::SVN->new($trunk_ref) };
1358                unless ($gs_trunk) {
1359                        my ($trunk_url, $trunk_path) =
1360                                              complete_svn_url($url, $_trunk);
1361                        $gs_trunk = Git::SVN->init($trunk_url, $trunk_path,
1362                                                   undef, $trunk_ref);
1363                }
1364        }
1365        return unless @_branches || @_tags;
1366        my $ra = $url ? Git::SVN::Ra->new($url) : undef;
1367        foreach my $path (@_branches) {
1368                complete_url_ls_init($ra, $path, '--branches/-b', $_prefix);
1369        }
1370        foreach my $path (@_tags) {
1371                complete_url_ls_init($ra, $path, '--tags/-t', $_prefix.'tags/');
1372        }
1373}
1374
1375sub cmd_multi_fetch {
1376        $Git::SVN::no_reuse_existing = undef;
1377        my $remotes = Git::SVN::read_all_remotes();
1378        foreach my $repo_id (sort keys %$remotes) {
1379                if ($remotes->{$repo_id}->{url}) {
1380                        Git::SVN::fetch_all($repo_id, $remotes);
1381                }
1382        }
1383}
1384
1385# this command is special because it requires no metadata
1386sub cmd_commit_diff {
1387        my ($ta, $tb, $url) = @_;
1388        my $usage = "Usage: $0 commit-diff -r<revision> ".
1389                    "<tree-ish> <tree-ish> [<URL>]";
1390        fatal($usage) if (!defined $ta || !defined $tb);
1391        my $svn_path = '';
1392        if (!defined $url) {
1393                my $gs = eval { Git::SVN->new };
1394                if (!$gs) {
1395                        fatal("Needed URL or usable git-svn --id in ",
1396                              "the command-line\n", $usage);
1397                }
1398                $url = $gs->{url};
1399                $svn_path = $gs->{path};
1400        }
1401        unless (defined $_revision) {
1402                fatal("-r|--revision is a required argument\n", $usage);
1403        }
1404        if (defined $_message && defined $_file) {
1405                fatal("Both --message/-m and --file/-F specified ",
1406                      "for the commit message.\n",
1407                      "I have no idea what you mean");
1408        }
1409        if (defined $_file) {
1410                $_message = file_to_s($_file);
1411        } else {
1412                $_message ||= get_commit_entry($tb)->{log};
1413        }
1414        my $ra ||= Git::SVN::Ra->new($url);
1415        my $r = $_revision;
1416        if ($r eq 'HEAD') {
1417                $r = $ra->get_latest_revnum;
1418        } elsif ($r !~ /^\d+$/) {
1419                die "revision argument: $r not understood by git-svn\n";
1420        }
1421        my %ed_opts = ( r => $r,
1422                        log => $_message,
1423                        ra => $ra,
1424                        tree_a => $ta,
1425                        tree_b => $tb,
1426                        editor_cb => sub { print "Committed r$_[0]\n" },
1427                        svn_path => $svn_path );
1428        if (!Git::SVN::Editor->new(\%ed_opts)->apply_diff) {
1429                print "No changes\n$ta == $tb\n";
1430        }
1431}
1432
1433sub escape_uri_only {
1434        my ($uri) = @_;
1435        my @tmp;
1436        foreach (split m{/}, $uri) {
1437                s/([^~\w.%+-]|%(?![a-fA-F0-9]{2}))/sprintf("%%%02X",ord($1))/eg;
1438                push @tmp, $_;
1439        }
1440        join('/', @tmp);
1441}
1442
1443sub escape_url {
1444        my ($url) = @_;
1445        if ($url =~ m#^([^:]+)://([^/]*)(.*)$#) {
1446                my ($scheme, $domain, $uri) = ($1, $2, escape_uri_only($3));
1447                $url = "$scheme://$domain$uri";
1448        }
1449        $url;
1450}
1451
1452sub cmd_info {
1453        my $path = canonicalize_path(defined($_[0]) ? $_[0] : ".");
1454        my $fullpath = canonicalize_path($cmd_dir_prefix . $path);
1455        if (exists $_[1]) {
1456                die "Too many arguments specified\n";
1457        }
1458
1459        my ($file_type, $diff_status) = find_file_type_and_diff_status($path);
1460
1461        if (!$file_type && !$diff_status) {
1462                print STDERR "svn: '$path' is not under version control\n";
1463                exit 1;
1464        }
1465
1466        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1467        unless ($gs) {
1468                die "Unable to determine upstream SVN information from ",
1469                    "working tree history\n";
1470        }
1471
1472        # canonicalize_path() will return "" to make libsvn 1.5.x happy,
1473        $path = "." if $path eq "";
1474
1475        my $full_url = $url . ($fullpath eq "" ? "" : "/$fullpath");
1476
1477        if ($_url) {
1478                print escape_url($full_url), "\n";
1479                return;
1480        }
1481
1482        my $result = "Path: $path\n";
1483        $result .= "Name: " . basename($path) . "\n" if $file_type ne "dir";
1484        $result .= "URL: " . escape_url($full_url) . "\n";
1485
1486        eval {
1487                my $repos_root = $gs->repos_root;
1488                Git::SVN::remove_username($repos_root);
1489                $result .= "Repository Root: " . escape_url($repos_root) . "\n";
1490        };
1491        if ($@) {
1492                $result .= "Repository Root: (offline)\n";
1493        }
1494        ::_req_svn();
1495        $result .= "Repository UUID: $uuid\n" unless $diff_status eq "A" &&
1496                (::compare_svn_version('1.5.4') <= 0 || $file_type ne "dir");
1497        $result .= "Revision: " . ($diff_status eq "A" ? 0 : $rev) . "\n";
1498
1499        $result .= "Node Kind: " .
1500                   ($file_type eq "dir" ? "directory" : "file") . "\n";
1501
1502        my $schedule = $diff_status eq "A"
1503                       ? "add"
1504                       : ($diff_status eq "D" ? "delete" : "normal");
1505        $result .= "Schedule: $schedule\n";
1506
1507        if ($diff_status eq "A") {
1508                print $result, "\n";
1509                return;
1510        }
1511
1512        my ($lc_author, $lc_rev, $lc_date_utc);
1513        my @args = Git::SVN::Log::git_svn_log_cmd($rev, $rev, "--", $fullpath);
1514        my $log = command_output_pipe(@args);
1515        my $esc_color = qr/(?:\033\[(?:(?:\d+;)*\d*)?m)*/;
1516        while (<$log>) {
1517                if (/^${esc_color}author (.+) <[^>]+> (\d+) ([\-\+]?\d+)$/o) {
1518                        $lc_author = $1;
1519                        $lc_date_utc = Git::SVN::Log::parse_git_date($2, $3);
1520                } elsif (/^${esc_color}    (git-svn-id:.+)$/o) {
1521                        (undef, $lc_rev, undef) = ::extract_metadata($1);
1522                }
1523        }
1524        close $log;
1525
1526        Git::SVN::Log::set_local_timezone();
1527
1528        $result .= "Last Changed Author: $lc_author\n";
1529        $result .= "Last Changed Rev: $lc_rev\n";
1530        $result .= "Last Changed Date: " .
1531                   Git::SVN::Log::format_svn_date($lc_date_utc) . "\n";
1532
1533        if ($file_type ne "dir") {
1534                my $text_last_updated_date =
1535                    ($diff_status eq "D" ? $lc_date_utc : (stat $path)[9]);
1536                $result .=
1537                    "Text Last Updated: " .
1538                    Git::SVN::Log::format_svn_date($text_last_updated_date) .
1539                    "\n";
1540                my $checksum;
1541                if ($diff_status eq "D") {
1542                        my ($fh, $ctx) =
1543                            command_output_pipe(qw(cat-file blob), "HEAD:$path");
1544                        if ($file_type eq "link") {
1545                                my $file_name = <$fh>;
1546                                $checksum = md5sum("link $file_name");
1547                        } else {
1548                                $checksum = md5sum($fh);
1549                        }
1550                        command_close_pipe($fh, $ctx);
1551                } elsif ($file_type eq "link") {
1552                        my $file_name =
1553                            command(qw(cat-file blob), "HEAD:$path");
1554                        $checksum =
1555                            md5sum("link " . $file_name);
1556                } else {
1557                        open FILE, "<", $path or die $!;
1558                        $checksum = md5sum(\*FILE);
1559                        close FILE or die $!;
1560                }
1561                $result .= "Checksum: " . $checksum . "\n";
1562        }
1563
1564        print $result, "\n";
1565}
1566
1567sub cmd_reset {
1568        my $target = shift || $_revision or die "SVN revision required\n";
1569        $target = $1 if $target =~ /^r(\d+)$/;
1570        $target =~ /^\d+$/ or die "Numeric SVN revision expected\n";
1571        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1572        unless ($gs) {
1573                die "Unable to determine upstream SVN information from ".
1574                    "history\n";
1575        }
1576        my ($r, $c) = $gs->find_rev_before($target, not $_fetch_parent);
1577        die "Cannot find SVN revision $target\n" unless defined($c);
1578        $gs->rev_map_set($r, $c, 'reset', $uuid);
1579        print "r$r = $c ($gs->{ref_id})\n";
1580}
1581
1582sub cmd_gc {
1583        if (!$can_compress) {
1584                warn "Compress::Zlib could not be found; unhandled.log " .
1585                     "files will not be compressed.\n";
1586        }
1587        find({ wanted => \&gc_directory, no_chdir => 1}, "$ENV{GIT_DIR}/svn");
1588}
1589
1590########################### utility functions #########################
1591
1592sub rebase_cmd {
1593        my @cmd = qw/rebase/;
1594        push @cmd, '-v' if $_verbose;
1595        push @cmd, qw/--merge/ if $_merge;
1596        push @cmd, "--strategy=$_strategy" if $_strategy;
1597        push @cmd, "--preserve-merges" if $_preserve_merges;
1598        @cmd;
1599}
1600
1601sub post_fetch_checkout {
1602        return if $_no_checkout;
1603        my $gs = $Git::SVN::_head or return;
1604        return if verify_ref('refs/heads/master^0');
1605
1606        # look for "trunk" ref if it exists
1607        my $remote = Git::SVN::read_all_remotes()->{$gs->{repo_id}};
1608        my $fetch = $remote->{fetch};
1609        if ($fetch) {
1610                foreach my $p (keys %$fetch) {
1611                        basename($fetch->{$p}) eq 'trunk' or next;
1612                        $gs = Git::SVN->new($fetch->{$p}, $gs->{repo_id}, $p);
1613                        last;
1614                }
1615        }
1616
1617        my $valid_head = verify_ref('HEAD^0');
1618        command_noisy(qw(update-ref refs/heads/master), $gs->refname);
1619        return if ($valid_head || !verify_ref('HEAD^0'));
1620
1621        return if $ENV{GIT_DIR} !~ m#^(?:.*/)?\.git$#;
1622        my $index = $ENV{GIT_INDEX_FILE} || "$ENV{GIT_DIR}/index";
1623        return if -f $index;
1624
1625        return if command_oneline(qw/rev-parse --is-inside-work-tree/) eq 'false';
1626        return if command_oneline(qw/rev-parse --is-inside-git-dir/) eq 'true';
1627        command_noisy(qw/read-tree -m -u -v HEAD HEAD/);
1628        print STDERR "Checked out HEAD:\n  ",
1629                     $gs->full_url, " r", $gs->last_rev, "\n";
1630        if (auto_create_empty_directories($gs)) {
1631                $gs->mkemptydirs($gs->last_rev);
1632        }
1633}
1634
1635sub complete_svn_url {
1636        my ($url, $path) = @_;
1637        $path =~ s#/+$##;
1638        if ($path !~ m#^[a-z\+]+://#) {
1639                if (!defined $url || $url !~ m#^[a-z\+]+://#) {
1640                        fatal("E: '$path' is not a complete URL ",
1641                              "and a separate URL is not specified");
1642                }
1643                return ($url, $path);
1644        }
1645        return ($path, '');
1646}
1647
1648sub complete_url_ls_init {
1649        my ($ra, $repo_path, $switch, $pfx) = @_;
1650        unless ($repo_path) {
1651                print STDERR "W: $switch not specified\n";
1652                return;
1653        }
1654        $repo_path =~ s#/+$##;
1655        if ($repo_path =~ m#^[a-z\+]+://#) {
1656                $ra = Git::SVN::Ra->new($repo_path);
1657                $repo_path = '';
1658        } else {
1659                $repo_path =~ s#^/+##;
1660                unless ($ra) {
1661                        fatal("E: '$repo_path' is not a complete URL ",
1662                              "and a separate URL is not specified");
1663                }
1664        }
1665        my $url = $ra->{url};
1666        my $gs = Git::SVN->init($url, undef, undef, undef, 1);
1667        my $k = "svn-remote.$gs->{repo_id}.url";
1668        my $orig_url = eval { command_oneline(qw/config --get/, $k) };
1669        if ($orig_url && ($orig_url ne $gs->{url})) {
1670                die "$k already set: $orig_url\n",
1671                    "wanted to set to: $gs->{url}\n";
1672        }
1673        command_oneline('config', $k, $gs->{url}) unless $orig_url;
1674        my $remote_path = "$gs->{path}/$repo_path";
1675        $remote_path =~ s{%([0-9A-F]{2})}{chr hex($1)}ieg;
1676        $remote_path =~ s#/+#/#g;
1677        $remote_path =~ s#^/##g;
1678        $remote_path .= "/*" if $remote_path !~ /\*/;
1679        my ($n) = ($switch =~ /^--(\w+)/);
1680        if (length $pfx && $pfx !~ m#/$#) {
1681                die "--prefix='$pfx' must have a trailing slash '/'\n";
1682        }
1683        command_noisy('config',
1684                      '--add',
1685                      "svn-remote.$gs->{repo_id}.$n",
1686                      "$remote_path:refs/remotes/$pfx*" .
1687                        ('/*' x (($remote_path =~ tr/*/*/) - 1)) );
1688}
1689
1690sub verify_ref {
1691        my ($ref) = @_;
1692        eval { command_oneline([ 'rev-parse', '--verify', $ref ],
1693                               { STDERR => 0 }); };
1694}
1695
1696sub get_tree_from_treeish {
1697        my ($treeish) = @_;
1698        # $treeish can be a symbolic ref, too:
1699        my $type = command_oneline(qw/cat-file -t/, $treeish);
1700        my $expected;
1701        while ($type eq 'tag') {
1702                ($treeish, $type) = command(qw/cat-file tag/, $treeish);
1703        }
1704        if ($type eq 'commit') {
1705                $expected = (grep /^tree /, command(qw/cat-file commit/,
1706                                                    $treeish))[0];
1707                ($expected) = ($expected =~ /^tree ($sha1)$/o);
1708                die "Unable to get tree from $treeish\n" unless $expected;
1709        } elsif ($type eq 'tree') {
1710                $expected = $treeish;
1711        } else {
1712                die "$treeish is a $type, expected tree, tag or commit\n";
1713        }
1714        return $expected;
1715}
1716
1717sub get_commit_entry {
1718        my ($treeish) = shift;
1719        my %log_entry = ( log => '', tree => get_tree_from_treeish($treeish) );
1720        my $commit_editmsg = "$ENV{GIT_DIR}/COMMIT_EDITMSG";
1721        my $commit_msg = "$ENV{GIT_DIR}/COMMIT_MSG";
1722        open my $log_fh, '>', $commit_editmsg or croak $!;
1723
1724        my $type = command_oneline(qw/cat-file -t/, $treeish);
1725        if ($type eq 'commit' || $type eq 'tag') {
1726                my ($msg_fh, $ctx) = command_output_pipe('cat-file',
1727                                                         $type, $treeish);
1728                my $in_msg = 0;
1729                my $author;
1730                my $saw_from = 0;
1731                my $msgbuf = "";
1732                while (<$msg_fh>) {
1733                        if (!$in_msg) {
1734                                $in_msg = 1 if (/^\s*$/);
1735                                $author = $1 if (/^author (.*>)/);
1736                        } elsif (/^git-svn-id: /) {
1737                                # skip this for now, we regenerate the
1738                                # correct one on re-fetch anyways
1739                                # TODO: set *:merge properties or like...
1740                        } else {
1741                                if (/^From:/ || /^Signed-off-by:/) {
1742                                        $saw_from = 1;
1743                                }
1744                                $msgbuf .= $_;
1745                        }
1746                }
1747                $msgbuf =~ s/\s+$//s;
1748                if ($Git::SVN::_add_author_from && defined($author)
1749                    && !$saw_from) {
1750                        $msgbuf .= "\n\nFrom: $author";
1751                }
1752                print $log_fh $msgbuf or croak $!;
1753                command_close_pipe($msg_fh, $ctx);
1754        }
1755        close $log_fh or croak $!;
1756
1757        if ($_edit || ($type eq 'tree')) {
1758                chomp(my $editor = command_oneline(qw(var GIT_EDITOR)));
1759                system('sh', '-c', $editor.' "$@"', $editor, $commit_editmsg);
1760        }
1761        rename $commit_editmsg, $commit_msg or croak $!;
1762        {
1763                require Encode;
1764                # SVN requires messages to be UTF-8 when entering the repo
1765                local $/;
1766                open $log_fh, '<', $commit_msg or croak $!;
1767                binmode $log_fh;
1768                chomp($log_entry{log} = <$log_fh>);
1769
1770                my $enc = Git::config('i18n.commitencoding') || 'UTF-8';
1771                my $msg = $log_entry{log};
1772
1773                eval { $msg = Encode::decode($enc, $msg, 1) };
1774                if ($@) {
1775                        die "Could not decode as $enc:\n", $msg,
1776                            "\nPerhaps you need to set i18n.commitencoding\n";
1777                }
1778
1779                eval { $msg = Encode::encode('UTF-8', $msg, 1) };
1780                die "Could not encode as UTF-8:\n$msg\n" if $@;
1781
1782                $log_entry{log} = $msg;
1783
1784                close $log_fh or croak $!;
1785        }
1786        unlink $commit_msg;
1787        \%log_entry;
1788}
1789
1790sub s_to_file {
1791        my ($str, $file, $mode) = @_;
1792        open my $fd,'>',$file or croak $!;
1793        print $fd $str,"\n" or croak $!;
1794        close $fd or croak $!;
1795        chmod ($mode &~ umask, $file) if (defined $mode);
1796}
1797
1798sub file_to_s {
1799        my $file = shift;
1800        open my $fd,'<',$file or croak "$!: file: $file\n";
1801        local $/;
1802        my $ret = <$fd>;
1803        close $fd or croak $!;
1804        $ret =~ s/\s*$//s;
1805        return $ret;
1806}
1807
1808# '<svn username> = real-name <email address>' mapping based on git-svnimport:
1809sub load_authors {
1810        open my $authors, '<', $_authors or die "Can't open $_authors $!\n";
1811        my $log = $cmd eq 'log';
1812        while (<$authors>) {
1813                chomp;
1814                next unless /^(.+?|\(no author\))\s*=\s*(.+?)\s*<(.+)>\s*$/;
1815                my ($user, $name, $email) = ($1, $2, $3);
1816                if ($log) {
1817                        $Git::SVN::Log::rusers{"$name <$email>"} = $user;
1818                } else {
1819                        $users{$user} = [$name, $email];
1820                }
1821        }
1822        close $authors or croak $!;
1823}
1824
1825# convert GetOpt::Long specs for use by git-config
1826sub read_git_config {
1827        my $opts = shift;
1828        my @config_only;
1829        foreach my $o (keys %$opts) {
1830                # if we have mixedCase and a long option-only, then
1831                # it's a config-only variable that we don't need for
1832                # the command-line.
1833                push @config_only, $o if ($o =~ /[A-Z]/ && $o =~ /^[a-z]+$/i);
1834                my $v = $opts->{$o};
1835                my ($key) = ($o =~ /^([a-zA-Z\-]+)/);
1836                $key =~ s/-//g;
1837                my $arg = 'git config';
1838                $arg .= ' --int' if ($o =~ /[:=]i$/);
1839                $arg .= ' --bool' if ($o !~ /[:=][sfi]$/);
1840                if (ref $v eq 'ARRAY') {
1841                        chomp(my @tmp = `$arg --get-all svn.$key`);
1842                        @$v = @tmp if @tmp;
1843                } else {
1844                        chomp(my $tmp = `$arg --get svn.$key`);
1845                        if ($tmp && !($arg =~ / --bool/ && $tmp eq 'false')) {
1846                                $$v = $tmp;
1847                        }
1848                }
1849        }
1850        delete @$opts{@config_only} if @config_only;
1851}
1852
1853sub extract_metadata {
1854        my $id = shift or return (undef, undef, undef);
1855        my ($url, $rev, $uuid) = ($id =~ /^\s*git-svn-id:\s+(.*)\@(\d+)
1856                                                        \s([a-f\d\-]+)$/ix);
1857        if (!defined $rev || !$uuid || !$url) {
1858                # some of the original repositories I made had
1859                # identifiers like this:
1860                ($rev, $uuid) = ($id =~/^\s*git-svn-id:\s(\d+)\@([a-f\d\-]+)/i);
1861        }
1862        return ($url, $rev, $uuid);
1863}
1864
1865sub cmt_metadata {
1866        return extract_metadata((grep(/^git-svn-id: /,
1867                command(qw/cat-file commit/, shift)))[-1]);
1868}
1869
1870sub cmt_sha2rev_batch {
1871        my %s2r;
1872        my ($pid, $in, $out, $ctx) = command_bidi_pipe(qw/cat-file --batch/);
1873        my $list = shift;
1874
1875        foreach my $sha (@{$list}) {
1876                my $first = 1;
1877                my $size = 0;
1878                print $out $sha, "\n";
1879
1880                while (my $line = <$in>) {
1881                        if ($first && $line =~ /^[[:xdigit:]]{40}\smissing$/) {
1882                                last;
1883                        } elsif ($first &&
1884                               $line =~ /^[[:xdigit:]]{40}\scommit\s(\d+)$/) {
1885                                $first = 0;
1886                                $size = $1;
1887                                next;
1888                        } elsif ($line =~ /^(git-svn-id: )/) {
1889                                my (undef, $rev, undef) =
1890                                                      extract_metadata($line);
1891                                $s2r{$sha} = $rev;
1892                        }
1893
1894                        $size -= length($line);
1895                        last if ($size == 0);
1896                }
1897        }
1898
1899        command_close_bidi_pipe($pid, $in, $out, $ctx);
1900
1901        return \%s2r;
1902}
1903
1904sub working_head_info {
1905        my ($head, $refs) = @_;
1906        my @args = qw/rev-list --first-parent --pretty=medium/;
1907        my ($fh, $ctx) = command_output_pipe(@args, $head);
1908        my $hash;
1909        my %max;
1910        while (<$fh>) {
1911                if ( m{^commit ($::sha1)$} ) {
1912                        unshift @$refs, $hash if $hash and $refs;
1913                        $hash = $1;
1914                        next;
1915                }
1916                next unless s{^\s*(git-svn-id:)}{$1};
1917                my ($url, $rev, $uuid) = extract_metadata($_);
1918                if (defined $url && defined $rev) {
1919                        next if $max{$url} and $max{$url} < $rev;
1920                        if (my $gs = Git::SVN->find_by_url($url)) {
1921                                my $c = $gs->rev_map_get($rev, $uuid);
1922                                if ($c && $c eq $hash) {
1923                                        close $fh; # break the pipe
1924                                        return ($url, $rev, $uuid, $gs);
1925                                } else {
1926                                        $max{$url} ||= $gs->rev_map_max;
1927                                }
1928                        }
1929                }
1930        }
1931        command_close_pipe($fh, $ctx);
1932        (undef, undef, undef, undef);
1933}
1934
1935sub read_commit_parents {
1936        my ($parents, $c) = @_;
1937        chomp(my $p = command_oneline(qw/rev-list --parents -1/, $c));
1938        $p =~ s/^($c)\s*// or die "rev-list --parents -1 $c failed!\n";
1939        @{$parents->{$c}} = split(/ /, $p);
1940}
1941
1942sub linearize_history {
1943        my ($gs, $refs) = @_;
1944        my %parents;
1945        foreach my $c (@$refs) {
1946                read_commit_parents(\%parents, $c);
1947        }
1948
1949        my @linear_refs;
1950        my %skip = ();
1951        my $last_svn_commit = $gs->last_commit;
1952        foreach my $c (reverse @$refs) {
1953                next if $c eq $last_svn_commit;
1954                last if $skip{$c};
1955
1956                unshift @linear_refs, $c;
1957                $skip{$c} = 1;
1958
1959                # we only want the first parent to diff against for linear
1960                # history, we save the rest to inject when we finalize the
1961                # svn commit
1962                my $fp_a = verify_ref("$c~1");
1963                my $fp_b = shift @{$parents{$c}} if $parents{$c};
1964                if (!$fp_a || !$fp_b) {
1965                        die "Commit $c\n",
1966                            "has no parent commit, and therefore ",
1967                            "nothing to diff against.\n",
1968                            "You should be working from a repository ",
1969                            "originally created by git-svn\n";
1970                }
1971                if ($fp_a ne $fp_b) {
1972                        die "$c~1 = $fp_a, however parsing commit $c ",
1973                            "revealed that:\n$c~1 = $fp_b\nBUG!\n";
1974                }
1975
1976                foreach my $p (@{$parents{$c}}) {
1977                        $skip{$p} = 1;
1978                }
1979        }
1980        (\@linear_refs, \%parents);
1981}
1982
1983sub find_file_type_and_diff_status {
1984        my ($path) = @_;
1985        return ('dir', '') if $path eq '';
1986
1987        my $diff_output =
1988            command_oneline(qw(diff --cached --name-status --), $path) || "";
1989        my $diff_status = (split(' ', $diff_output))[0] || "";
1990
1991        my $ls_tree = command_oneline(qw(ls-tree HEAD), $path) || "";
1992
1993        return (undef, undef) if !$diff_status && !$ls_tree;
1994
1995        if ($diff_status eq "A") {
1996                return ("link", $diff_status) if -l $path;
1997                return ("dir", $diff_status) if -d $path;
1998                return ("file", $diff_status);
1999        }
2000
2001        my $mode = (split(' ', $ls_tree))[0] || "";
2002
2003        return ("link", $diff_status) if $mode eq "120000";
2004        return ("dir", $diff_status) if $mode eq "040000";
2005        return ("file", $diff_status);
2006}
2007
2008sub md5sum {
2009        my $arg = shift;
2010        my $ref = ref $arg;
2011        my $md5 = Digest::MD5->new();
2012        if ($ref eq 'GLOB' || $ref eq 'IO::File' || $ref eq 'File::Temp') {
2013                $md5->addfile($arg) or croak $!;
2014        } elsif ($ref eq 'SCALAR') {
2015                $md5->add($$arg) or croak $!;
2016        } elsif (!$ref) {
2017                $md5->add($arg) or croak $!;
2018        } else {
2019                ::fatal "Can't provide MD5 hash for unknown ref type: '", $ref, "'";
2020        }
2021        return $md5->hexdigest();
2022}
2023
2024sub gc_directory {
2025        if ($can_compress && -f $_ && basename($_) eq "unhandled.log") {
2026                my $out_filename = $_ . ".gz";
2027                open my $in_fh, "<", $_ or die "Unable to open $_: $!\n";
2028                binmode $in_fh;
2029                my $gz = Compress::Zlib::gzopen($out_filename, "ab") or
2030                                die "Unable to open $out_filename: $!\n";
2031
2032                my $res;
2033                while ($res = sysread($in_fh, my $str, 1024)) {
2034                        $gz->gzwrite($str) or
2035                                die "Unable to write: ".$gz->gzerror()."!\n";
2036                }
2037                unlink $_ or die "unlink $File::Find::name: $!\n";
2038        } elsif (-f $_ && basename($_) eq "index") {
2039                unlink $_ or die "unlink $_: $!\n";
2040        }
2041}
2042
2043package Git::SVN;
2044use strict;
2045use warnings;
2046use Fcntl qw/:DEFAULT :seek/;
2047use constant rev_map_fmt => 'NH40';
2048use vars qw/$default_repo_id $default_ref_id $_no_metadata $_follow_parent
2049            $_repack $_repack_flags $_use_svm_props $_head
2050            $_use_svnsync_props $no_reuse_existing $_minimize_url
2051            $_use_log_author $_add_author_from $_localtime/;
2052use Carp qw/croak/;
2053use File::Path qw/mkpath/;
2054use File::Copy qw/copy/;
2055use IPC::Open3;
2056use Time::Local;
2057use Memoize;  # core since 5.8.0, Jul 2002
2058use Memoize::Storable;
2059use POSIX qw(:signal_h);
2060
2061my ($_gc_nr, $_gc_period);
2062
2063# properties that we do not log:
2064my %SKIP_PROP;
2065BEGIN {
2066        %SKIP_PROP = map { $_ => 1 } qw/svn:wc:ra_dav:version-url
2067                                        svn:special svn:executable
2068                                        svn:entry:committed-rev
2069                                        svn:entry:last-author
2070                                        svn:entry:uuid
2071                                        svn:entry:committed-date/;
2072
2073        # some options are read globally, but can be overridden locally
2074        # per [svn-remote "..."] section.  Command-line options will *NOT*
2075        # override options set in an [svn-remote "..."] section
2076        no strict 'refs';
2077        for my $option (qw/follow_parent no_metadata use_svm_props
2078                           use_svnsync_props/) {
2079                my $key = $option;
2080                $key =~ tr/_//d;
2081                my $prop = "-$option";
2082                *$option = sub {
2083                        my ($self) = @_;
2084                        return $self->{$prop} if exists $self->{$prop};
2085                        my $k = "svn-remote.$self->{repo_id}.$key";
2086                        eval { command_oneline(qw/config --get/, $k) };
2087                        if ($@) {
2088                                $self->{$prop} = ${"Git::SVN::_$option"};
2089                        } else {
2090                                my $v = command_oneline(qw/config --bool/,$k);
2091                                $self->{$prop} = $v eq 'false' ? 0 : 1;
2092                        }
2093                        return $self->{$prop};
2094                }
2095        }
2096}
2097
2098
2099my (%LOCKFILES, %INDEX_FILES);
2100END {
2101        unlink keys %LOCKFILES if %LOCKFILES;
2102        unlink keys %INDEX_FILES if %INDEX_FILES;
2103}
2104
2105sub resolve_local_globs {
2106        my ($url, $fetch, $glob_spec) = @_;
2107        return unless defined $glob_spec;
2108        my $ref = $glob_spec->{ref};
2109        my $path = $glob_spec->{path};
2110        foreach (command(qw#for-each-ref --format=%(refname) refs/#)) {
2111                next unless m#^$ref->{regex}$#;
2112                my $p = $1;
2113                my $pathname = desanitize_refname($path->full_path($p));
2114                my $refname = desanitize_refname($ref->full_path($p));
2115                if (my $existing = $fetch->{$pathname}) {
2116                        if ($existing ne $refname) {
2117                                die "Refspec conflict:\n",
2118                                    "existing: $existing\n",
2119                                    " globbed: $refname\n";
2120                        }
2121                        my $u = (::cmt_metadata("$refname"))[0];
2122                        $u =~ s!^\Q$url\E(/|$)!! or die
2123                          "$refname: '$url' not found in '$u'\n";
2124                        if ($pathname ne $u) {
2125                                warn "W: Refspec glob conflict ",
2126                                     "(ref: $refname):\n",
2127                                     "expected path: $pathname\n",
2128                                     "    real path: $u\n",
2129                                     "Continuing ahead with $u\n";
2130                                next;
2131                        }
2132                } else {
2133                        $fetch->{$pathname} = $refname;
2134                }
2135        }
2136}
2137
2138sub parse_revision_argument {
2139        my ($base, $head) = @_;
2140        if (!defined $::_revision || $::_revision eq 'BASE:HEAD') {
2141                return ($base, $head);
2142        }
2143        return ($1, $2) if ($::_revision =~ /^(\d+):(\d+)$/);
2144        return ($::_revision, $::_revision) if ($::_revision =~ /^\d+$/);
2145        return ($head, $head) if ($::_revision eq 'HEAD');
2146        return ($base, $1) if ($::_revision =~ /^BASE:(\d+)$/);
2147        return ($1, $head) if ($::_revision =~ /^(\d+):HEAD$/);
2148        die "revision argument: $::_revision not understood by git-svn\n";
2149}
2150
2151sub fetch_all {
2152        my ($repo_id, $remotes) = @_;
2153        if (ref $repo_id) {
2154                my $gs = $repo_id;
2155                $repo_id = undef;
2156                $repo_id = $gs->{repo_id};
2157        }
2158        $remotes ||= read_all_remotes();
2159        my $remote = $remotes->{$repo_id} or
2160                     die "[svn-remote \"$repo_id\"] unknown\n";
2161        my $fetch = $remote->{fetch};
2162        my $url = $remote->{url} or die "svn-remote.$repo_id.url not defined\n";
2163        my (@gs, @globs);
2164        my $ra = Git::SVN::Ra->new($url);
2165        my $uuid = $ra->get_uuid;
2166        my $head = $ra->get_latest_revnum;
2167
2168        # ignore errors, $head revision may not even exist anymore
2169        eval { $ra->get_log("", $head, 0, 1, 0, 1, sub { $head = $_[1] }) };
2170        warn "W: $@\n" if $@;
2171
2172        my $base = defined $fetch ? $head : 0;
2173
2174        # read the max revs for wildcard expansion (branches/*, tags/*)
2175        foreach my $t (qw/branches tags/) {
2176                defined $remote->{$t} or next;
2177                push @globs, @{$remote->{$t}};
2178
2179                my $max_rev = eval { tmp_config(qw/--int --get/,
2180                                         "svn-remote.$repo_id.${t}-maxRev") };
2181                if (defined $max_rev && ($max_rev < $base)) {
2182                        $base = $max_rev;
2183                } elsif (!defined $max_rev) {
2184                        $base = 0;
2185                }
2186        }
2187
2188        if ($fetch) {
2189                foreach my $p (sort keys %$fetch) {
2190                        my $gs = Git::SVN->new($fetch->{$p}, $repo_id, $p);
2191                        my $lr = $gs->rev_map_max;
2192                        if (defined $lr) {
2193                                $base = $lr if ($lr < $base);
2194                        }
2195                        push @gs, $gs;
2196                }
2197        }
2198
2199        ($base, $head) = parse_revision_argument($base, $head);
2200        $ra->gs_fetch_loop_common($base, $head, \@gs, \@globs);
2201}
2202
2203sub read_all_remotes {
2204        my $r = {};
2205        my $use_svm_props = eval { command_oneline(qw/config --bool
2206            svn.useSvmProps/) };
2207        $use_svm_props = $use_svm_props eq 'true' if $use_svm_props;
2208        my $svn_refspec = qr{\s*(.*?)\s*:\s*(.+?)\s*};
2209        foreach (grep { s/^svn-remote\.// } command(qw/config -l/)) {
2210                if (m!^(.+)\.fetch=$svn_refspec$!) {
2211                        my ($remote, $local_ref, $remote_ref) = ($1, $2, $3);
2212                        die("svn-remote.$remote: remote ref '$remote_ref' "
2213                            . "must start with 'refs/'\n")
2214                                unless $remote_ref =~ m{^refs/};
2215                        $local_ref = uri_decode($local_ref);
2216                        $r->{$remote}->{fetch}->{$local_ref} = $remote_ref;
2217                        $r->{$remote}->{svm} = {} if $use_svm_props;
2218                } elsif (m!^(.+)\.usesvmprops=\s*(.*)\s*$!) {
2219                        $r->{$1}->{svm} = {};
2220                } elsif (m!^(.+)\.url=\s*(.*)\s*$!) {
2221                        $r->{$1}->{url} = $2;
2222                } elsif (m!^(.+)\.pushurl=\s*(.*)\s*$!) {
2223                        $r->{$1}->{pushurl} = $2;
2224                } elsif (m!^(.+)\.ignore-refs=\s*(.*)\s*$!) {
2225                        $r->{$1}->{ignore_refs_regex} = $2;
2226                } elsif (m!^(.+)\.(branches|tags)=$svn_refspec$!) {
2227                        my ($remote, $t, $local_ref, $remote_ref) =
2228                                                             ($1, $2, $3, $4);
2229                        die("svn-remote.$remote: remote ref '$remote_ref' ($t) "
2230                            . "must start with 'refs/'\n")
2231                                unless $remote_ref =~ m{^refs/};
2232                        $local_ref = uri_decode($local_ref);
2233                        my $rs = {
2234                            t => $t,
2235                            remote => $remote,
2236                            path => Git::SVN::GlobSpec->new($local_ref, 1),
2237                            ref => Git::SVN::GlobSpec->new($remote_ref, 0) };
2238                        if (length($rs->{ref}->{right}) != 0) {
2239                                die "The '*' glob character must be the last ",
2240                                    "character of '$remote_ref'\n";
2241                        }
2242                        push @{ $r->{$remote}->{$t} }, $rs;
2243                }
2244        }
2245
2246        map {
2247                if (defined $r->{$_}->{svm}) {
2248                        my $svm;
2249                        eval {
2250                                my $section = "svn-remote.$_";
2251                                $svm = {
2252                                        source => tmp_config('--get',
2253                                            "$section.svm-source"),
2254                                        replace => tmp_config('--get',
2255                                            "$section.svm-replace"),
2256                                }
2257                        };
2258                        $r->{$_}->{svm} = $svm;
2259                }
2260        } keys %$r;
2261
2262        foreach my $remote (keys %$r) {
2263                foreach ( grep { defined $_ }
2264                          map { $r->{$remote}->{$_} } qw(branches tags) ) {
2265                        foreach my $rs ( @$_ ) {
2266                                $rs->{ignore_refs_regex} =
2267                                    $r->{$remote}->{ignore_refs_regex};
2268                        }
2269                }
2270        }
2271
2272        $r;
2273}
2274
2275sub init_vars {
2276        $_gc_nr = $_gc_period = 1000;
2277        if (defined $_repack || defined $_repack_flags) {
2278               warn "Repack options are obsolete; they have no effect.\n";
2279        }
2280}
2281
2282sub verify_remotes_sanity {
2283        return unless -d $ENV{GIT_DIR};
2284        my %seen;
2285        foreach (command(qw/config -l/)) {
2286                if (m!^svn-remote\.(?:.+)\.fetch=.*:refs/remotes/(\S+)\s*$!) {
2287                        if ($seen{$1}) {
2288                                die "Remote ref refs/remote/$1 is tracked by",
2289                                    "\n  \"$_\"\nand\n  \"$seen{$1}\"\n",
2290                                    "Please resolve this ambiguity in ",
2291                                    "your git configuration file before ",
2292                                    "continuing\n";
2293                        }
2294                        $seen{$1} = $_;
2295                }
2296        }
2297}
2298
2299sub find_existing_remote {
2300        my ($url, $remotes) = @_;
2301        return undef if $no_reuse_existing;
2302        my $existing;
2303        foreach my $repo_id (keys %$remotes) {
2304                my $u = $remotes->{$repo_id}->{url} or next;
2305                next if $u ne $url;
2306                $existing = $repo_id;
2307                last;
2308        }
2309        $existing;
2310}
2311
2312sub init_remote_config {
2313        my ($self, $url, $no_write) = @_;
2314        $url =~ s!/+$!!; # strip trailing slash
2315        my $r = read_all_remotes();
2316        my $existing = find_existing_remote($url, $r);
2317        if ($existing) {
2318                unless ($no_write) {
2319                        print STDERR "Using existing ",
2320                                     "[svn-remote \"$existing\"]\n";
2321                }
2322                $self->{repo_id} = $existing;
2323        } elsif ($_minimize_url) {
2324                my $min_url = Git::SVN::Ra->new($url)->minimize_url;
2325                $existing = find_existing_remote($min_url, $r);
2326                if ($existing) {
2327                        unless ($no_write) {
2328                                print STDERR "Using existing ",
2329                                             "[svn-remote \"$existing\"]\n";
2330                        }
2331                        $self->{repo_id} = $existing;
2332                }
2333                if ($min_url ne $url) {
2334                        unless ($no_write) {
2335                                print STDERR "Using higher level of URL: ",
2336                                             "$url => $min_url\n";
2337                        }
2338                        my $old_path = $self->{path};
2339                        $self->{path} = $url;
2340                        $self->{path} =~ s!^\Q$min_url\E(/|$)!!;
2341                        if (length $old_path) {
2342                                $self->{path} .= "/$old_path";
2343                        }
2344                        $url = $min_url;
2345                }
2346        }
2347        my $orig_url;
2348        if (!$existing) {
2349                # verify that we aren't overwriting anything:
2350                $orig_url = eval {
2351                        command_oneline('config', '--get',
2352                                        "svn-remote.$self->{repo_id}.url")
2353                };
2354                if ($orig_url && ($orig_url ne $url)) {
2355                        die "svn-remote.$self->{repo_id}.url already set: ",
2356                            "$orig_url\nwanted to set to: $url\n";
2357                }
2358        }
2359        my ($xrepo_id, $xpath) = find_ref($self->refname);
2360        if (!$no_write && defined $xpath) {
2361                die "svn-remote.$xrepo_id.fetch already set to track ",
2362                    "$xpath:", $self->refname, "\n";
2363        }
2364        unless ($no_write) {
2365                command_noisy('config',
2366                              "svn-remote.$self->{repo_id}.url", $url);
2367                $self->{path} =~ s{^/}{};
2368                $self->{path} =~ s{%([0-9A-F]{2})}{chr hex($1)}ieg;
2369                command_noisy('config', '--add',
2370                              "svn-remote.$self->{repo_id}.fetch",
2371                              "$self->{path}:".$self->refname);
2372        }
2373        $self->{url} = $url;
2374}
2375
2376sub find_by_url { # repos_root and, path are optional
2377        my ($class, $full_url, $repos_root, $path) = @_;
2378
2379        return undef unless defined $full_url;
2380        remove_username($full_url);
2381        remove_username($repos_root) if defined $repos_root;
2382        my $remotes = read_all_remotes();
2383        if (defined $full_url && defined $repos_root && !defined $path) {
2384                $path = $full_url;
2385                $path =~ s#^\Q$repos_root\E(?:/|$)##;
2386        }
2387        foreach my $repo_id (keys %$remotes) {
2388                my $u = $remotes->{$repo_id}->{url} or next;
2389                remove_username($u);
2390                next if defined $repos_root && $repos_root ne $u;
2391
2392                my $fetch = $remotes->{$repo_id}->{fetch} || {};
2393                foreach my $t (qw/branches tags/) {
2394                        foreach my $globspec (@{$remotes->{$repo_id}->{$t}}) {
2395                                resolve_local_globs($u, $fetch, $globspec);
2396                        }
2397                }
2398                my $p = $path;
2399                my $rwr = rewrite_root({repo_id => $repo_id});
2400                my $svm = $remotes->{$repo_id}->{svm}
2401                        if defined $remotes->{$repo_id}->{svm};
2402                unless (defined $p) {
2403                        $p = $full_url;
2404                        my $z = $u;
2405                        my $prefix = '';
2406                        if ($rwr) {
2407                                $z = $rwr;
2408                                remove_username($z);
2409                        } elsif (defined $svm) {
2410                                $z = $svm->{source};
2411                                $prefix = $svm->{replace};
2412                                $prefix =~ s#^\Q$u\E(?:/|$)##;
2413                                $prefix =~ s#/$##;
2414                        }
2415                        $p =~ s#^\Q$z\E(?:/|$)#$prefix# or next;
2416                }
2417                foreach my $f (keys %$fetch) {
2418                        next if $f ne $p;
2419                        return Git::SVN->new($fetch->{$f}, $repo_id, $f);
2420                }
2421        }
2422        undef;
2423}
2424
2425sub init {
2426        my ($class, $url, $path, $repo_id, $ref_id, $no_write) = @_;
2427        my $self = _new($class, $repo_id, $ref_id, $path);
2428        if (defined $url) {
2429                $self->init_remote_config($url, $no_write);
2430        }
2431        $self;
2432}
2433
2434sub find_ref {
2435        my ($ref_id) = @_;
2436        foreach (command(qw/config -l/)) {
2437                next unless m!^svn-remote\.(.+)\.fetch=
2438                              \s*(.*?)\s*:\s*(.+?)\s*$!x;
2439                my ($repo_id, $path, $ref) = ($1, $2, $3);
2440                if ($ref eq $ref_id) {
2441                        $path = '' if ($path =~ m#^\./?#);
2442                        return ($repo_id, $path);
2443                }
2444        }
2445        (undef, undef, undef);
2446}
2447
2448sub new {
2449        my ($class, $ref_id, $repo_id, $path) = @_;
2450        if (defined $ref_id && !defined $repo_id && !defined $path) {
2451                ($repo_id, $path) = find_ref($ref_id);
2452                if (!defined $repo_id) {
2453                        die "Could not find a \"svn-remote.*.fetch\" key ",
2454                            "in the repository configuration matching: ",
2455                            "$ref_id\n";
2456                }
2457        }
2458        my $self = _new($class, $repo_id, $ref_id, $path);
2459        if (!defined $self->{path} || !length $self->{path}) {
2460                my $fetch = command_oneline('config', '--get',
2461                                            "svn-remote.$repo_id.fetch",
2462                                            ":$ref_id\$") or
2463                     die "Failed to read \"svn-remote.$repo_id.fetch\" ",
2464                         "\":$ref_id\$\" in config\n";
2465                ($self->{path}, undef) = split(/\s*:\s*/, $fetch);
2466        }
2467        $self->{path} =~ s{/+}{/}g;
2468        $self->{path} =~ s{\A/}{};
2469        $self->{path} =~ s{/\z}{};
2470        $self->{url} = command_oneline('config', '--get',
2471                                       "svn-remote.$repo_id.url") or
2472                  die "Failed to read \"svn-remote.$repo_id.url\" in config\n";
2473        $self->{pushurl} = eval { command_oneline('config', '--get',
2474                                  "svn-remote.$repo_id.pushurl") };
2475        $self->rebuild;
2476        $self;
2477}
2478
2479sub refname {
2480        my ($refname) = $_[0]->{ref_id} ;
2481
2482        # It cannot end with a slash /, we'll throw up on this because
2483        # SVN can't have directories with a slash in their name, either:
2484        if ($refname =~ m{/$}) {
2485                die "ref: '$refname' ends with a trailing slash, this is ",
2486                    "not permitted by git nor Subversion\n";
2487        }
2488
2489        # It cannot have ASCII control character space, tilde ~, caret ^,
2490        # colon :, question-mark ?, asterisk *, space, or open bracket [
2491        # anywhere.
2492        #
2493        # Additionally, % must be escaped because it is used for escaping
2494        # and we want our escaped refname to be reversible
2495        $refname =~ s{([ \%~\^:\?\*\[\t])}{uc sprintf('%%%02x',ord($1))}eg;
2496
2497        # no slash-separated component can begin with a dot .
2498        # /.* becomes /%2E*
2499        $refname =~ s{/\.}{/%2E}g;
2500
2501        # It cannot have two consecutive dots .. anywhere
2502        # .. becomes %2E%2E
2503        $refname =~ s{\.\.}{%2E%2E}g;
2504
2505        # trailing dots and .lock are not allowed
2506        # .$ becomes %2E and .lock becomes %2Elock
2507        $refname =~ s{\.(?=$|lock$)}{%2E};
2508
2509        # the sequence @{ is used to access the reflog
2510        # @{ becomes %40{
2511        $refname =~ s{\@\{}{%40\{}g;
2512
2513        return $refname;
2514}
2515
2516sub desanitize_refname {
2517        my ($refname) = @_;
2518        $refname =~ s{%(?:([0-9A-F]{2}))}{chr hex($1)}eg;
2519        return $refname;
2520}
2521
2522sub svm_uuid {
2523        my ($self) = @_;
2524        return $self->{svm}->{uuid} if $self->svm;
2525        $self->ra;
2526        unless ($self->{svm}) {
2527                die "SVM UUID not cached, and reading remotely failed\n";
2528        }
2529        $self->{svm}->{uuid};
2530}
2531
2532sub svm {
2533        my ($self) = @_;
2534        return $self->{svm} if $self->{svm};
2535        my $svm;
2536        # see if we have it in our config, first:
2537        eval {
2538                my $section = "svn-remote.$self->{repo_id}";
2539                $svm = {
2540                  source => tmp_config('--get', "$section.svm-source"),
2541                  uuid => tmp_config('--get', "$section.svm-uuid"),
2542                  replace => tmp_config('--get', "$section.svm-replace"),
2543                }
2544        };
2545        if ($svm && $svm->{source} && $svm->{uuid} && $svm->{replace}) {
2546                $self->{svm} = $svm;
2547        }
2548        $self->{svm};
2549}
2550
2551sub _set_svm_vars {
2552        my ($self, $ra) = @_;
2553        return $ra if $self->svm;
2554
2555        my @err = ( "useSvmProps set, but failed to read SVM properties\n",
2556                    "(svm:source, svm:uuid) ",
2557                    "from the following URLs:\n" );
2558        sub read_svm_props {
2559                my ($self, $ra, $path, $r) = @_;
2560                my $props = ($ra->get_dir($path, $r))[2];
2561                my $src = $props->{'svm:source'};
2562                my $uuid = $props->{'svm:uuid'};
2563                return undef if (!$src || !$uuid);
2564
2565                chomp($src, $uuid);
2566
2567                $uuid =~ m{^[0-9a-f\-]{30,}$}i
2568                    or die "doesn't look right - svm:uuid is '$uuid'\n";
2569
2570                # the '!' is used to mark the repos_root!/relative/path
2571                $src =~ s{/?!/?}{/};
2572                $src =~ s{/+$}{}; # no trailing slashes please
2573                # username is of no interest
2574                $src =~ s{(^[a-z\+]*://)[^/@]*@}{$1};
2575
2576                my $replace = $ra->{url};
2577                $replace .= "/$path" if length $path;
2578
2579                my $section = "svn-remote.$self->{repo_id}";
2580                tmp_config("$section.svm-source", $src);
2581                tmp_config("$section.svm-replace", $replace);
2582                tmp_config("$section.svm-uuid", $uuid);
2583                $self->{svm} = {
2584                        source => $src,
2585                        uuid => $uuid,
2586                        replace => $replace
2587                };
2588        }
2589
2590        my $r = $ra->get_latest_revnum;
2591        my $path = $self->{path};
2592        my %tried;
2593        while (length $path) {
2594                unless ($tried{"$self->{url}/$path"}) {
2595                        return $ra if $self->read_svm_props($ra, $path, $r);
2596                        $tried{"$self->{url}/$path"} = 1;
2597                }
2598                $path =~ s#/?[^/]+$##;
2599        }
2600        die "Path: '$path' should be ''\n" if $path ne '';
2601        return $ra if $self->read_svm_props($ra, $path, $r);
2602        $tried{"$self->{url}/$path"} = 1;
2603
2604        if ($ra->{repos_root} eq $self->{url}) {
2605                die @err, (map { "  $_\n" } keys %tried), "\n";
2606        }
2607
2608        # nope, make sure we're connected to the repository root:
2609        my $ok;
2610        my @tried_b;
2611        $path = $ra->{svn_path};
2612        $ra = Git::SVN::Ra->new($ra->{repos_root});
2613        while (length $path) {
2614                unless ($tried{"$ra->{url}/$path"}) {
2615                        $ok = $self->read_svm_props($ra, $path, $r);
2616                        last if $ok;
2617                        $tried{"$ra->{url}/$path"} = 1;
2618                }
2619                $path =~ s#/?[^/]+$##;
2620        }
2621        die "Path: '$path' should be ''\n" if $path ne '';
2622        $ok ||= $self->read_svm_props($ra, $path, $r);
2623        $tried{"$ra->{url}/$path"} = 1;
2624        if (!$ok) {
2625                die @err, (map { "  $_\n" } keys %tried), "\n";
2626        }
2627        Git::SVN::Ra->new($self->{url});
2628}
2629
2630sub svnsync {
2631        my ($self) = @_;
2632        return $self->{svnsync} if $self->{svnsync};
2633
2634        if ($self->no_metadata) {
2635                die "Can't have both 'noMetadata' and ",
2636                    "'useSvnsyncProps' options set!\n";
2637        }
2638        if ($self->rewrite_root) {
2639                die "Can't have both 'useSvnsyncProps' and 'rewriteRoot' ",
2640                    "options set!\n";
2641        }
2642        if ($self->rewrite_uuid) {
2643                die "Can't have both 'useSvnsyncProps' and 'rewriteUUID' ",
2644                    "options set!\n";
2645        }
2646
2647        my $svnsync;
2648        # see if we have it in our config, first:
2649        eval {
2650                my $section = "svn-remote.$self->{repo_id}";
2651
2652                my $url = tmp_config('--get', "$section.svnsync-url");
2653                ($url) = ($url =~ m{^([a-z\+]+://\S+)$}) or
2654                   die "doesn't look right - svn:sync-from-url is '$url'\n";
2655
2656                my $uuid = tmp_config('--get', "$section.svnsync-uuid");
2657                ($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}i) or
2658                   die "doesn't look right - svn:sync-from-uuid is '$uuid'\n";
2659
2660                $svnsync = { url => $url, uuid => $uuid }
2661        };
2662        if ($svnsync && $svnsync->{url} && $svnsync->{uuid}) {
2663                return $self->{svnsync} = $svnsync;
2664        }
2665
2666        my $err = "useSvnsyncProps set, but failed to read " .
2667                  "svnsync property: svn:sync-from-";
2668        my $rp = $self->ra->rev_proplist(0);
2669
2670        my $url = $rp->{'svn:sync-from-url'} or die $err . "url\n";
2671        ($url) = ($url =~ m{^([a-z\+]+://\S+)$}) or
2672                   die "doesn't look right - svn:sync-from-url is '$url'\n";
2673
2674        my $uuid = $rp->{'svn:sync-from-uuid'} or die $err . "uuid\n";
2675        ($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}i) or
2676                   die "doesn't look right - svn:sync-from-uuid is '$uuid'\n";
2677
2678        my $section = "svn-remote.$self->{repo_id}";
2679        tmp_config('--add', "$section.svnsync-uuid", $uuid);
2680        tmp_config('--add', "$section.svnsync-url", $url);
2681        return $self->{svnsync} = { url => $url, uuid => $uuid };
2682}
2683
2684# this allows us to memoize our SVN::Ra UUID locally and avoid a
2685# remote lookup (useful for 'git svn log').
2686sub ra_uuid {
2687        my ($self) = @_;
2688        unless ($self->{ra_uuid}) {
2689                my $key = "svn-remote.$self->{repo_id}.uuid";
2690                my $uuid = eval { tmp_config('--get', $key) };
2691                if (!$@ && $uuid && $uuid =~ /^([a-f\d\-]{30,})$/i) {
2692                        $self->{ra_uuid} = $uuid;
2693                } else {
2694                        die "ra_uuid called without URL\n" unless $self->{url};
2695                        $self->{ra_uuid} = $self->ra->get_uuid;
2696                        tmp_config('--add', $key, $self->{ra_uuid});
2697                }
2698        }
2699        $self->{ra_uuid};
2700}
2701
2702sub _set_repos_root {
2703        my ($self, $repos_root) = @_;
2704        my $k = "svn-remote.$self->{repo_id}.reposRoot";
2705        $repos_root ||= $self->ra->{repos_root};
2706        tmp_config($k, $repos_root);
2707        $repos_root;
2708}
2709
2710sub repos_root {
2711        my ($self) = @_;
2712        my $k = "svn-remote.$self->{repo_id}.reposRoot";
2713        eval { tmp_config('--get', $k) } || $self->_set_repos_root;
2714}
2715
2716sub ra {
2717        my ($self) = shift;
2718        my $ra = Git::SVN::Ra->new($self->{url});
2719        $self->_set_repos_root($ra->{repos_root});
2720        if ($self->use_svm_props && !$self->{svm}) {
2721                if ($self->no_metadata) {
2722                        die "Can't have both 'noMetadata' and ",
2723                            "'useSvmProps' options set!\n";
2724                } elsif ($self->use_svnsync_props) {
2725                        die "Can't have both 'useSvnsyncProps' and ",
2726                            "'useSvmProps' options set!\n";
2727                }
2728                $ra = $self->_set_svm_vars($ra);
2729                $self->{-want_revprops} = 1;
2730        }
2731        $ra;
2732}
2733
2734# prop_walk(PATH, REV, SUB)
2735# -------------------------
2736# Recursively traverse PATH at revision REV and invoke SUB for each
2737# directory that contains a SVN property.  SUB will be invoked as
2738# follows:  &SUB(gs, path, props);  where `gs' is this instance of
2739# Git::SVN, `path' the path to the directory where the properties
2740# `props' were found.  The `path' will be relative to point of checkout,
2741# that is, if url://repo/trunk is the current Git branch, and that
2742# directory contains a sub-directory `d', SUB will be invoked with `/d/'
2743# as `path' (note the trailing `/').
2744sub prop_walk {
2745        my ($self, $path, $rev, $sub) = @_;
2746
2747        $path =~ s#^/##;
2748        my ($dirent, undef, $props) = $self->ra->get_dir($path, $rev);
2749        $path =~ s#^/*#/#g;
2750        my $p = $path;
2751        # Strip the irrelevant part of the path.
2752        $p =~ s#^/+\Q$self->{path}\E(/|$)#/#;
2753        # Ensure the path is terminated by a `/'.
2754        $p =~ s#/*$#/#;
2755
2756        # The properties contain all the internal SVN stuff nobody
2757        # (usually) cares about.
2758        my $interesting_props = 0;
2759        foreach (keys %{$props}) {
2760                # If it doesn't start with `svn:', it must be a
2761                # user-defined property.
2762                ++$interesting_props and next if $_ !~ /^svn:/;
2763                # FIXME: Fragile, if SVN adds new public properties,
2764                # this needs to be updated.
2765                ++$interesting_props if /^svn:(?:ignore|keywords|executable
2766                                                 |eol-style|mime-type
2767                                                 |externals|needs-lock)$/x;
2768        }
2769        &$sub($self, $p, $props) if $interesting_props;
2770
2771        foreach (sort keys %$dirent) {
2772                next if $dirent->{$_}->{kind} != $SVN::Node::dir;
2773                $self->prop_walk($self->{path} . $p . $_, $rev, $sub);
2774        }
2775}
2776
2777sub last_rev { ($_[0]->last_rev_commit)[0] }
2778sub last_commit { ($_[0]->last_rev_commit)[1] }
2779
2780# returns the newest SVN revision number and newest commit SHA1
2781sub last_rev_commit {
2782        my ($self) = @_;
2783        if (defined $self->{last_rev} && defined $self->{last_commit}) {
2784                return ($self->{last_rev}, $self->{last_commit});
2785        }
2786        my $c = ::verify_ref($self->refname.'^0');
2787        if ($c && !$self->use_svm_props && !$self->no_metadata) {
2788                my $rev = (::cmt_metadata($c))[1];
2789                if (defined $rev) {
2790                        ($self->{last_rev}, $self->{last_commit}) = ($rev, $c);
2791                        return ($rev, $c);
2792                }
2793        }
2794        my $map_path = $self->map_path;
2795        unless (-e $map_path) {
2796                ($self->{last_rev}, $self->{last_commit}) = (undef, undef);
2797                return (undef, undef);
2798        }
2799        my ($rev, $commit) = $self->rev_map_max(1);
2800        ($self->{last_rev}, $self->{last_commit}) = ($rev, $commit);
2801        return ($rev, $commit);
2802}
2803
2804sub get_fetch_range {
2805        my ($self, $min, $max) = @_;
2806        $max ||= $self->ra->get_latest_revnum;
2807        $min ||= $self->rev_map_max;
2808        (++$min, $max);
2809}
2810
2811sub tmp_config {
2812        my (@args) = @_;
2813        my $old_def_config = "$ENV{GIT_DIR}/svn/config";
2814        my $config = "$ENV{GIT_DIR}/svn/.metadata";
2815        if (! -f $config && -f $old_def_config) {
2816                rename $old_def_config, $config or
2817                       die "Failed rename $old_def_config => $config: $!\n";
2818        }
2819        my $old_config = $ENV{GIT_CONFIG};
2820        $ENV{GIT_CONFIG} = $config;
2821        $@ = undef;
2822        my @ret = eval {
2823                unless (-f $config) {
2824                        mkfile($config);
2825                        open my $fh, '>', $config or
2826                            die "Can't open $config: $!\n";
2827                        print $fh "; This file is used internally by ",
2828                                  "git-svn\n" or die
2829                                  "Couldn't write to $config: $!\n";
2830                        print $fh "; You should not have to edit it\n" or
2831                              die "Couldn't write to $config: $!\n";
2832                        close $fh or die "Couldn't close $config: $!\n";
2833                }
2834                command('config', @args);
2835        };
2836        my $err = $@;
2837        if (defined $old_config) {
2838                $ENV{GIT_CONFIG} = $old_config;
2839        } else {
2840                delete $ENV{GIT_CONFIG};
2841        }
2842        die $err if $err;
2843        wantarray ? @ret : $ret[0];
2844}
2845
2846sub tmp_index_do {
2847        my ($self, $sub) = @_;
2848        my $old_index = $ENV{GIT_INDEX_FILE};
2849        $ENV{GIT_INDEX_FILE} = $self->{index};
2850        $@ = undef;
2851        my @ret = eval {
2852                my ($dir, $base) = ($self->{index} =~ m#^(.*?)/?([^/]+)$#);
2853                mkpath([$dir]) unless -d $dir;
2854                &$sub;
2855        };
2856        my $err = $@;
2857        if (defined $old_index) {
2858                $ENV{GIT_INDEX_FILE} = $old_index;
2859        } else {
2860                delete $ENV{GIT_INDEX_FILE};
2861        }
2862        die $err if $err;
2863        wantarray ? @ret : $ret[0];
2864}
2865
2866sub assert_index_clean {
2867        my ($self, $treeish) = @_;
2868
2869        $self->tmp_index_do(sub {
2870                command_noisy('read-tree', $treeish) unless -e $self->{index};
2871                my $x = command_oneline('write-tree');
2872                my ($y) = (command(qw/cat-file commit/, $treeish) =~
2873                           /^tree ($::sha1)/mo);
2874                return if $y eq $x;
2875
2876                warn "Index mismatch: $y != $x\nrereading $treeish\n";
2877                unlink $self->{index} or die "unlink $self->{index}: $!\n";
2878                command_noisy('read-tree', $treeish);
2879                $x = command_oneline('write-tree');
2880                if ($y ne $x) {
2881                        ::fatal "trees ($treeish) $y != $x\n",
2882                                "Something is seriously wrong...";
2883                }
2884        });
2885}
2886
2887sub get_commit_parents {
2888        my ($self, $log_entry) = @_;
2889        my (%seen, @ret, @tmp);
2890        # legacy support for 'set-tree'; this is only used by set_tree_cb:
2891        if (my $ip = $self->{inject_parents}) {
2892                if (my $commit = delete $ip->{$log_entry->{revision}}) {
2893                        push @tmp, $commit;
2894                }
2895        }
2896        if (my $cur = ::verify_ref($self->refname.'^0')) {
2897                push @tmp, $cur;
2898        }
2899        if (my $ipd = $self->{inject_parents_dcommit}) {
2900                if (my $commit = delete $ipd->{$log_entry->{revision}}) {
2901                        push @tmp, @$commit;
2902                }
2903        }
2904        push @tmp, $_ foreach (@{$log_entry->{parents}}, @tmp);
2905        while (my $p = shift @tmp) {
2906                next if $seen{$p};
2907                $seen{$p} = 1;
2908                push @ret, $p;
2909        }
2910        @ret;
2911}
2912
2913sub rewrite_root {
2914        my ($self) = @_;
2915        return $self->{-rewrite_root} if exists $self->{-rewrite_root};
2916        my $k = "svn-remote.$self->{repo_id}.rewriteRoot";
2917        my $rwr = eval { command_oneline(qw/config --get/, $k) };
2918        if ($rwr) {
2919                $rwr =~ s#/+$##;
2920                if ($rwr !~ m#^[a-z\+]+://#) {
2921                        die "$rwr is not a valid URL (key: $k)\n";
2922                }
2923        }
2924        $self->{-rewrite_root} = $rwr;
2925}
2926
2927sub rewrite_uuid {
2928        my ($self) = @_;
2929        return $self->{-rewrite_uuid} if exists $self->{-rewrite_uuid};
2930        my $k = "svn-remote.$self->{repo_id}.rewriteUUID";
2931        my $rwid = eval { command_oneline(qw/config --get/, $k) };
2932        if ($rwid) {
2933                $rwid =~ s#/+$##;
2934                if ($rwid !~ m#^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}$#) {
2935                        die "$rwid is not a valid UUID (key: $k)\n";
2936                }
2937        }
2938        $self->{-rewrite_uuid} = $rwid;
2939}
2940
2941sub metadata_url {
2942        my ($self) = @_;
2943        ($self->rewrite_root || $self->{url}) .
2944           (length $self->{path} ? '/' . $self->{path} : '');
2945}
2946
2947sub full_url {
2948        my ($self) = @_;
2949        $self->{url} . (length $self->{path} ? '/' . $self->{path} : '');
2950}
2951
2952sub full_pushurl {
2953        my ($self) = @_;
2954        if ($self->{pushurl}) {
2955                return $self->{pushurl} . (length $self->{path} ? '/' .
2956                       $self->{path} : '');
2957        } else {
2958                return $self->full_url;
2959        }
2960}
2961
2962sub set_commit_header_env {
2963        my ($log_entry) = @_;
2964        my %env;
2965        foreach my $ned (qw/NAME EMAIL DATE/) {
2966                foreach my $ac (qw/AUTHOR COMMITTER/) {
2967                        $env{"GIT_${ac}_${ned}"} = $ENV{"GIT_${ac}_${ned}"};
2968                }
2969        }
2970
2971        $ENV{GIT_AUTHOR_NAME} = $log_entry->{name};
2972        $ENV{GIT_AUTHOR_EMAIL} = $log_entry->{email};
2973        $ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} = $log_entry->{date};
2974
2975        $ENV{GIT_COMMITTER_NAME} = (defined $log_entry->{commit_name})
2976                                                ? $log_entry->{commit_name}
2977                                                : $log_entry->{name};
2978        $ENV{GIT_COMMITTER_EMAIL} = (defined $log_entry->{commit_email})
2979                                                ? $log_entry->{commit_email}
2980                                                : $log_entry->{email};
2981        \%env;
2982}
2983
2984sub restore_commit_header_env {
2985        my ($env) = @_;
2986        foreach my $ned (qw/NAME EMAIL DATE/) {
2987                foreach my $ac (qw/AUTHOR COMMITTER/) {
2988                        my $k = "GIT_${ac}_${ned}";
2989                        if (defined $env->{$k}) {
2990                                $ENV{$k} = $env->{$k};
2991                        } else {
2992                                delete $ENV{$k};
2993                        }
2994                }
2995        }
2996}
2997
2998sub gc {
2999        command_noisy('gc', '--auto');
3000};
3001
3002sub do_git_commit {
3003        my ($self, $log_entry) = @_;
3004        my $lr = $self->last_rev;
3005        if (defined $lr && $lr >= $log_entry->{revision}) {
3006                die "Last fetched revision of ", $self->refname,
3007                    " was r$lr, but we are about to fetch: ",
3008                    "r$log_entry->{revision}!\n";
3009        }
3010        if (my $c = $self->rev_map_get($log_entry->{revision})) {
3011                croak "$log_entry->{revision} = $c already exists! ",
3012                      "Why are we refetching it?\n";
3013        }
3014        my $old_env = set_commit_header_env($log_entry);
3015        my $tree = $log_entry->{tree};
3016        if (!defined $tree) {
3017                $tree = $self->tmp_index_do(sub {
3018                                            command_oneline('write-tree') });
3019        }
3020        die "Tree is not a valid sha1: $tree\n" if $tree !~ /^$::sha1$/o;
3021
3022        my @exec = ('git', 'commit-tree', $tree);
3023        foreach ($self->get_commit_parents($log_entry)) {
3024                push @exec, '-p', $_;
3025        }
3026        defined(my $pid = open3(my $msg_fh, my $out_fh, '>&STDERR', @exec))
3027                                                                   or croak $!;
3028        binmode $msg_fh;
3029
3030        # we always get UTF-8 from SVN, but we may want our commits in
3031        # a different encoding.
3032        if (my $enc = Git::config('i18n.commitencoding')) {
3033                require Encode;
3034                Encode::from_to($log_entry->{log}, 'UTF-8', $enc);
3035        }
3036        print $msg_fh $log_entry->{log} or croak $!;
3037        restore_commit_header_env($old_env);
3038        unless ($self->no_metadata) {
3039                print $msg_fh "\ngit-svn-id: $log_entry->{metadata}\n"
3040                              or croak $!;
3041        }
3042        $msg_fh->flush == 0 or croak $!;
3043        close $msg_fh or croak $!;
3044        chomp(my $commit = do { local $/; <$out_fh> });
3045        close $out_fh or croak $!;
3046        waitpid $pid, 0;
3047        croak $? if $?;
3048        if ($commit !~ /^$::sha1$/o) {
3049                die "Failed to commit, invalid sha1: $commit\n";
3050        }
3051
3052        $self->rev_map_set($log_entry->{revision}, $commit, 1);
3053
3054        $self->{last_rev} = $log_entry->{revision};
3055        $self->{last_commit} = $commit;
3056        print "r$log_entry->{revision}" unless $::_q > 1;
3057        if (defined $log_entry->{svm_revision}) {
3058                 print " (\@$log_entry->{svm_revision})" unless $::_q > 1;
3059                 $self->rev_map_set($log_entry->{svm_revision}, $commit,
3060                                   0, $self->svm_uuid);
3061        }
3062        print " = $commit ($self->{ref_id})\n" unless $::_q > 1;
3063        if (--$_gc_nr == 0) {
3064                $_gc_nr = $_gc_period;
3065                gc();
3066        }
3067        return $commit;
3068}
3069
3070sub match_paths {
3071        my ($self, $paths, $r) = @_;
3072        return 1 if $self->{path} eq '';
3073        if (my $path = $paths->{"/$self->{path}"}) {
3074                return ($path->{action} eq 'D') ? 0 : 1;
3075        }
3076        $self->{path_regex} ||= qr/^\/\Q$self->{path}\E\//;
3077        if (grep /$self->{path_regex}/, keys %$paths) {
3078                return 1;
3079        }
3080        my $c = '';
3081        foreach (split m#/#, $self->{path}) {
3082                $c .= "/$_";
3083                next unless ($paths->{$c} &&
3084                             ($paths->{$c}->{action} =~ /^[AR]$/));
3085                if ($self->ra->check_path($self->{path}, $r) ==
3086                    $SVN::Node::dir) {
3087                        return 1;
3088                }
3089        }
3090        return 0;
3091}
3092
3093sub find_parent_branch {
3094        my ($self, $paths, $rev) = @_;
3095        return undef unless $self->follow_parent;
3096        unless (defined $paths) {
3097                my $err_handler = $SVN::Error::handler;
3098                $SVN::Error::handler = \&Git::SVN::Ra::skip_unknown_revs;
3099                $self->ra->get_log([$self->{path}], $rev, $rev, 0, 1, 1,
3100                                   sub { $paths = $_[0] });
3101                $SVN::Error::handler = $err_handler;
3102        }
3103        return undef unless defined $paths;
3104
3105        # look for a parent from another branch:
3106        my @b_path_components = split m#/#, $self->{path};
3107        my @a_path_components;
3108        my $i;
3109        while (@b_path_components) {
3110                $i = $paths->{'/'.join('/', @b_path_components)};
3111                last if $i && defined $i->{copyfrom_path};
3112                unshift(@a_path_components, pop(@b_path_components));
3113        }
3114        return undef unless defined $i && defined $i->{copyfrom_path};
3115        my $branch_from = $i->{copyfrom_path};
3116        if (@a_path_components) {
3117                print STDERR "branch_from: $branch_from => ";
3118                $branch_from .= '/'.join('/', @a_path_components);
3119                print STDERR $branch_from, "\n";
3120        }
3121        my $r = $i->{copyfrom_rev};
3122        my $repos_root = $self->ra->{repos_root};
3123        my $url = $self->ra->{url};
3124        my $new_url = $url . $branch_from;
3125        print STDERR  "Found possible branch point: ",
3126                      "$new_url => ", $self->full_url, ", $r\n"
3127                      unless $::_q > 1;
3128        $branch_from =~ s#^/##;
3129        my $gs = $self->other_gs($new_url, $url,
3130                                 $branch_from, $r, $self->{ref_id});
3131        my ($r0, $parent) = $gs->find_rev_before($r, 1);
3132        {
3133                my ($base, $head);
3134                if (!defined $r0 || !defined $parent) {
3135                        ($base, $head) = parse_revision_argument(0, $r);
3136                } else {
3137                        if ($r0 < $r) {
3138                                $gs->ra->get_log([$gs->{path}], $r0 + 1, $r, 1,
3139                                        0, 1, sub { $base = $_[1] - 1 });
3140                        }
3141                }
3142                if (defined $base && $base <= $r) {
3143                        $gs->fetch($base, $r);
3144                }
3145                ($r0, $parent) = $gs->find_rev_before($r, 1);
3146        }
3147        if (defined $r0 && defined $parent) {
3148                print STDERR "Found branch parent: ($self->{ref_id}) $parent\n"
3149                             unless $::_q > 1;
3150                my $ed;
3151                if ($self->ra->can_do_switch) {
3152                        $self->assert_index_clean($parent);
3153                        print STDERR "Following parent with do_switch\n"
3154                                     unless $::_q > 1;
3155                        # do_switch works with svn/trunk >= r22312, but that
3156                        # is not included with SVN 1.4.3 (the latest version
3157                        # at the moment), so we can't rely on it
3158                        $self->{last_rev} = $r0;
3159                        $self->{last_commit} = $parent;
3160                        $ed = Git::SVN::Fetcher->new($self, $gs->{path});
3161                        $gs->ra->gs_do_switch($r0, $rev, $gs,
3162                                              $self->full_url, $ed)
3163                          or die "SVN connection failed somewhere...\n";
3164                } elsif ($self->ra->trees_match($new_url, $r0,
3165                                                $self->full_url, $rev)) {
3166                        print STDERR "Trees match:\n",
3167                                     "  $new_url\@$r0\n",
3168                                     "  ${\$self->full_url}\@$rev\n",
3169                                     "Following parent with no changes\n"
3170                                     unless $::_q > 1;
3171                        $self->tmp_index_do(sub {
3172                            command_noisy('read-tree', $parent);
3173                        });
3174                        $self->{last_commit} = $parent;
3175                } else {
3176                        print STDERR "Following parent with do_update\n"
3177                                     unless $::_q > 1;
3178                        $ed = Git::SVN::Fetcher->new($self);
3179                        $self->ra->gs_do_update($rev, $rev, $self, $ed)
3180                          or die "SVN connection failed somewhere...\n";
3181                }
3182                print STDERR "Successfully followed parent\n" unless $::_q > 1;
3183                return $self->make_log_entry($rev, [$parent], $ed);
3184        }
3185        return undef;
3186}
3187
3188sub do_fetch {
3189        my ($self, $paths, $rev) = @_;
3190        my $ed;
3191        my ($last_rev, @parents);
3192        if (my $lc = $self->last_commit) {
3193                # we can have a branch that was deleted, then re-added
3194                # under the same name but copied from another path, in
3195                # which case we'll have multiple parents (we don't
3196                # want to break the original ref, nor lose copypath info):
3197                if (my $log_entry = $self->find_parent_branch($paths, $rev)) {
3198                        push @{$log_entry->{parents}}, $lc;
3199                        return $log_entry;
3200                }
3201                $ed = Git::SVN::Fetcher->new($self);
3202                $last_rev = $self->{last_rev};
3203                $ed->{c} = $lc;
3204                @parents = ($lc);
3205        } else {
3206                $last_rev = $rev;
3207                if (my $log_entry = $self->find_parent_branch($paths, $rev)) {
3208                        return $log_entry;
3209                }
3210                $ed = Git::SVN::Fetcher->new($self);
3211        }
3212        unless ($self->ra->gs_do_update($last_rev, $rev, $self, $ed)) {
3213                die "SVN connection failed somewhere...\n";
3214        }
3215        $self->make_log_entry($rev, \@parents, $ed);
3216}
3217
3218sub mkemptydirs {
3219        my ($self, $r) = @_;
3220
3221        sub scan {
3222                my ($r, $empty_dirs, $line) = @_;
3223                if (defined $r && $line =~ /^r(\d+)$/) {
3224                        return 0 if $1 > $r;
3225                } elsif ($line =~ /^  \+empty_dir: (.+)$/) {
3226                        $empty_dirs->{$1} = 1;
3227                } elsif ($line =~ /^  \-empty_dir: (.+)$/) {
3228                        my @d = grep {m[^\Q$1\E(/|$)]} (keys %$empty_dirs);
3229                        delete @$empty_dirs{@d};
3230                }
3231                1; # continue
3232        };
3233
3234        my %empty_dirs = ();
3235        my $gz_file = "$self->{dir}/unhandled.log.gz";
3236        if (-f $gz_file) {
3237                if (!$can_compress) {
3238                        warn "Compress::Zlib could not be found; ",
3239                             "empty directories in $gz_file will not be read\n";
3240                } else {
3241                        my $gz = Compress::Zlib::gzopen($gz_file, "rb") or
3242                                die "Unable to open $gz_file: $!\n";
3243                        my $line;
3244                        while ($gz->gzreadline($line) > 0) {
3245                                scan($r, \%empty_dirs, $line) or last;
3246                        }
3247                        $gz->gzclose;
3248                }
3249        }
3250
3251        if (open my $fh, '<', "$self->{dir}/unhandled.log") {
3252                binmode $fh or croak "binmode: $!";
3253                while (<$fh>) {
3254                        scan($r, \%empty_dirs, $_) or last;
3255                }
3256                close $fh;
3257        }
3258
3259        my $strip = qr/\A\Q$self->{path}\E(?:\/|$)/;
3260        foreach my $d (sort keys %empty_dirs) {
3261                $d = uri_decode($d);
3262                $d =~ s/$strip//;
3263                next unless length($d);
3264                next if -d $d;
3265                if (-e $d) {
3266                        warn "$d exists but is not a directory\n";
3267                } else {
3268                        print "creating empty directory: $d\n";
3269                        mkpath([$d]);
3270                }
3271        }
3272}
3273
3274sub get_untracked {
3275        my ($self, $ed) = @_;
3276        my @out;
3277        my $h = $ed->{empty};
3278        foreach (sort keys %$h) {
3279                my $act = $h->{$_} ? '+empty_dir' : '-empty_dir';
3280                push @out, "  $act: " . uri_encode($_);
3281                warn "W: $act: $_\n";
3282        }
3283        foreach my $t (qw/dir_prop file_prop/) {
3284                $h = $ed->{$t} or next;
3285                foreach my $path (sort keys %$h) {
3286                        my $ppath = $path eq '' ? '.' : $path;
3287                        foreach my $prop (sort keys %{$h->{$path}}) {
3288                                next if $SKIP_PROP{$prop};
3289                                my $v = $h->{$path}->{$prop};
3290                                my $t_ppath_prop = "$t: " .
3291                                                    uri_encode($ppath) . ' ' .
3292                                                    uri_encode($prop);
3293                                if (defined $v) {
3294                                        push @out, "  +$t_ppath_prop " .
3295                                                   uri_encode($v);
3296                                } else {
3297                                        push @out, "  -$t_ppath_prop";
3298                                }
3299                        }
3300                }
3301        }
3302        foreach my $t (qw/absent_file absent_directory/) {
3303                $h = $ed->{$t} or next;
3304                foreach my $parent (sort keys %$h) {
3305                        foreach my $path (sort @{$h->{$parent}}) {
3306                                push @out, "  $t: " .
3307                                           uri_encode("$parent/$path");
3308                                warn "W: $t: $parent/$path ",
3309                                     "Insufficient permissions?\n";
3310                        }
3311                }
3312        }
3313        \@out;
3314}
3315
3316sub get_tz {
3317        # some systmes don't handle or mishandle %z, so be creative.
3318        my $t = shift || time;
3319        my $gm = timelocal(gmtime($t));
3320        my $sign = qw( + + - )[ $t <=> $gm ];
3321        return sprintf("%s%02d%02d", $sign, (gmtime(abs($t - $gm)))[2,1]);
3322}
3323
3324# parse_svn_date(DATE)
3325# --------------------
3326# Given a date (in UTC) from Subversion, return a string in the format
3327# "<TZ Offset> <local date/time>" that Git will use.
3328#
3329# By default the parsed date will be in UTC; if $Git::SVN::_localtime
3330# is true we'll convert it to the local timezone instead.
3331sub parse_svn_date {
3332        my $date = shift || return '+0000 1970-01-01 00:00:00';
3333        my ($Y,$m,$d,$H,$M,$S) = ($date =~ /^(\d{4})\-(\d\d)\-(\d\d)T
3334                                            (\d\d)\:(\d\d)\:(\d\d)\.\d*Z$/x) or
3335                                         croak "Unable to parse date: $date\n";
3336        my $parsed_date;    # Set next.
3337
3338        if ($Git::SVN::_localtime) {
3339                # Translate the Subversion datetime to an epoch time.
3340                # Begin by switching ourselves to $date's timezone, UTC.
3341                my $old_env_TZ = $ENV{TZ};
3342                $ENV{TZ} = 'UTC';
3343
3344                my $epoch_in_UTC =
3345                    POSIX::strftime('%s', $S, $M, $H, $d, $m - 1, $Y - 1900);
3346
3347                # Determine our local timezone (including DST) at the
3348                # time of $epoch_in_UTC.  $Git::SVN::Log::TZ stored the
3349                # value of TZ, if any, at the time we were run.
3350                if (defined $Git::SVN::Log::TZ) {
3351                        $ENV{TZ} = $Git::SVN::Log::TZ;
3352                } else {
3353                        delete $ENV{TZ};
3354                }
3355
3356                my $our_TZ = get_tz();
3357
3358                # This converts $epoch_in_UTC into our local timezone.
3359                my ($sec, $min, $hour, $mday, $mon, $year,
3360                    $wday, $yday, $isdst) = localtime($epoch_in_UTC);
3361
3362                $parsed_date = sprintf('%s %04d-%02d-%02d %02d:%02d:%02d',
3363                                       $our_TZ, $year + 1900, $mon + 1,
3364                                       $mday, $hour, $min, $sec);
3365
3366                # Reset us to the timezone in effect when we entered
3367                # this routine.
3368                if (defined $old_env_TZ) {
3369                        $ENV{TZ} = $old_env_TZ;
3370                } else {
3371                        delete $ENV{TZ};
3372                }
3373        } else {
3374                $parsed_date = "+0000 $Y-$m-$d $H:$M:$S";
3375        }
3376
3377        return $parsed_date;
3378}
3379
3380sub other_gs {
3381        my ($self, $new_url, $url,
3382            $branch_from, $r, $old_ref_id) = @_;
3383        my $gs = Git::SVN->find_by_url($new_url, $url, $branch_from);
3384        unless ($gs) {
3385                my $ref_id = $old_ref_id;
3386                $ref_id =~ s/\@\d+-*$//;
3387                $ref_id .= "\@$r";
3388                # just grow a tail if we're not unique enough :x
3389                $ref_id .= '-' while find_ref($ref_id);
3390                my ($u, $p, $repo_id) = ($new_url, '', $ref_id);
3391                if ($u =~ s#^\Q$url\E(/|$)##) {
3392                        $p = $u;
3393                        $u = $url;
3394                        $repo_id = $self->{repo_id};
3395                }
3396                while (1) {
3397                        # It is possible to tag two different subdirectories at
3398                        # the same revision.  If the url for an existing ref
3399                        # does not match, we must either find a ref with a
3400                        # matching url or create a new ref by growing a tail.
3401                        $gs = Git::SVN->init($u, $p, $repo_id, $ref_id, 1);
3402                        my (undef, $max_commit) = $gs->rev_map_max(1);
3403                        last if (!$max_commit);
3404                        my ($url) = ::cmt_metadata($max_commit);
3405                        last if ($url eq $gs->metadata_url);
3406                        $ref_id .= '-';
3407                }
3408                print STDERR "Initializing parent: $ref_id\n" unless $::_q > 1;
3409        }
3410        $gs
3411}
3412
3413sub call_authors_prog {
3414        my ($orig_author) = @_;
3415        $orig_author = command_oneline('rev-parse', '--sq-quote', $orig_author);
3416        my $author = `$::_authors_prog $orig_author`;
3417        if ($? != 0) {
3418                die "$::_authors_prog failed with exit code $?\n"
3419        }
3420        if ($author =~ /^\s*(.+?)\s*<(.*)>\s*$/) {
3421                my ($name, $email) = ($1, $2);
3422                $email = undef if length $2 == 0;
3423                return [$name, $email];
3424        } else {
3425                die "Author: $orig_author: $::_authors_prog returned "
3426                        . "invalid author format: $author\n";
3427        }
3428}
3429
3430sub check_author {
3431        my ($author) = @_;
3432        if (!defined $author || length $author == 0) {
3433                $author = '(no author)';
3434        }
3435        if (!defined $::users{$author}) {
3436                if (defined $::_authors_prog) {
3437                        $::users{$author} = call_authors_prog($author);
3438                } elsif (defined $::_authors) {
3439                        die "Author: $author not defined in $::_authors file\n";
3440                }
3441        }
3442        $author;
3443}
3444
3445sub find_extra_svk_parents {
3446        my ($self, $ed, $tickets, $parents) = @_;
3447        # aha!  svk:merge property changed...
3448        my @tickets = split "\n", $tickets;
3449        my @known_parents;
3450        for my $ticket ( @tickets ) {
3451                my ($uuid, $path, $rev) = split /:/, $ticket;
3452                if ( $uuid eq $self->ra_uuid ) {
3453                        my $url = $self->{url};
3454                        my $repos_root = $url;
3455                        my $branch_from = $path;
3456                        $branch_from =~ s{^/}{};
3457                        my $gs = $self->other_gs($repos_root."/".$branch_from,
3458                                                 $url,
3459                                                 $branch_from,
3460                                                 $rev,
3461                                                 $self->{ref_id});
3462                        if ( my $commit = $gs->rev_map_get($rev, $uuid) ) {
3463                                # wahey!  we found it, but it might be
3464                                # an old one (!)
3465                                push @known_parents, [ $rev, $commit ];
3466                        }
3467                }
3468        }
3469        # Ordering matters; highest-numbered commit merge tickets
3470        # first, as they may account for later merge ticket additions
3471        # or changes.
3472        @known_parents = map {$_->[1]} sort {$b->[0] <=> $a->[0]} @known_parents;
3473        for my $parent ( @known_parents ) {
3474                my @cmd = ('rev-list', $parent, map { "^$_" } @$parents );
3475                my ($msg_fh, $ctx) = command_output_pipe(@cmd);
3476                my $new;
3477                while ( <$msg_fh> ) {
3478                        $new=1;last;
3479                }
3480                command_close_pipe($msg_fh, $ctx);
3481                if ( $new ) {
3482                        print STDERR
3483                            "Found merge parent (svk:merge ticket): $parent\n";
3484                        push @$parents, $parent;
3485                }
3486        }
3487}
3488
3489sub lookup_svn_merge {
3490        my $uuid = shift;
3491        my $url = shift;
3492        my $merge = shift;
3493
3494        my ($source, $revs) = split ":", $merge;
3495        my $path = $source;
3496        $path =~ s{^/}{};
3497        my $gs = Git::SVN->find_by_url($url.$source, $url, $path);
3498        if ( !$gs ) {
3499                warn "Couldn't find revmap for $url$source\n";
3500                return;
3501        }
3502        my @ranges = split ",", $revs;
3503        my ($tip, $tip_commit);
3504        my @merged_commit_ranges;
3505        # find the tip
3506        for my $range ( @ranges ) {
3507                my ($bottom, $top) = split "-", $range;
3508                $top ||= $bottom;
3509                my $bottom_commit = $gs->find_rev_after( $bottom, 1, $top );
3510                my $top_commit = $gs->find_rev_before( $top, 1, $bottom );
3511
3512                unless ($top_commit and $bottom_commit) {
3513                        warn "W:unknown path/rev in svn:mergeinfo "
3514                                ."dirprop: $source:$range\n";
3515                        next;
3516                }
3517
3518                if (scalar(command('rev-parse', "$bottom_commit^@"))) {
3519                        push @merged_commit_ranges,
3520                             "$bottom_commit^..$top_commit";
3521                } else {
3522                        push @merged_commit_ranges, "$top_commit";
3523                }
3524
3525                if ( !defined $tip or $top > $tip ) {
3526                        $tip = $top;
3527                        $tip_commit = $top_commit;
3528                }
3529        }
3530        return ($tip_commit, @merged_commit_ranges);
3531}
3532
3533sub _rev_list {
3534        my ($msg_fh, $ctx) = command_output_pipe(
3535                "rev-list", @_,
3536               );
3537        my @rv;
3538        while ( <$msg_fh> ) {
3539                chomp;
3540                push @rv, $_;
3541        }
3542        command_close_pipe($msg_fh, $ctx);
3543        @rv;
3544}
3545
3546sub check_cherry_pick {
3547        my $base = shift;
3548        my $tip = shift;
3549        my $parents = shift;
3550        my @ranges = @_;
3551        my %commits = map { $_ => 1 }
3552                _rev_list("--no-merges", $tip, "--not", $base, @$parents, "--");
3553        for my $range ( @ranges ) {
3554                delete @commits{_rev_list($range, "--")};
3555        }
3556        for my $commit (keys %commits) {
3557                if (has_no_changes($commit)) {
3558                        delete $commits{$commit};
3559                }
3560        }
3561        return (keys %commits);
3562}
3563
3564sub has_no_changes {
3565        my $commit = shift;
3566
3567        my @revs = split / /, command_oneline(
3568                qw(rev-list --parents -1 -m), $commit);
3569
3570        # Commits with no parents, e.g. the start of a partial branch,
3571        # have changes by definition.
3572        return 1 if (@revs < 2);
3573
3574        # Commits with multiple parents, e.g a merge, have no changes
3575        # by definition.
3576        return 0 if (@revs > 2);
3577
3578        return (command_oneline("rev-parse", "$commit^{tree}") eq
3579                command_oneline("rev-parse", "$commit~1^{tree}"));
3580}
3581
3582# The GIT_DIR environment variable is not always set until after the command
3583# line arguments are processed, so we can't memoize in a BEGIN block.
3584{
3585        my $memoized = 0;
3586
3587        sub memoize_svn_mergeinfo_functions {
3588                return if $memoized;
3589                $memoized = 1;
3590
3591                my $cache_path = "$ENV{GIT_DIR}/svn/.caches/";
3592                mkpath([$cache_path]) unless -d $cache_path;
3593
3594                tie my %lookup_svn_merge_cache => 'Memoize::Storable',
3595                    "$cache_path/lookup_svn_merge.db", 'nstore';
3596                memoize 'lookup_svn_merge',
3597                        SCALAR_CACHE => 'FAULT',
3598                        LIST_CACHE => ['HASH' => \%lookup_svn_merge_cache],
3599                ;
3600
3601                tie my %check_cherry_pick_cache => 'Memoize::Storable',
3602                    "$cache_path/check_cherry_pick.db", 'nstore';
3603                memoize 'check_cherry_pick',
3604                        SCALAR_CACHE => 'FAULT',
3605                        LIST_CACHE => ['HASH' => \%check_cherry_pick_cache],
3606                ;
3607
3608                tie my %has_no_changes_cache => 'Memoize::Storable',
3609                    "$cache_path/has_no_changes.db", 'nstore';
3610                memoize 'has_no_changes',
3611                        SCALAR_CACHE => ['HASH' => \%has_no_changes_cache],
3612                        LIST_CACHE => 'FAULT',
3613                ;
3614        }
3615
3616        sub unmemoize_svn_mergeinfo_functions {
3617                return if not $memoized;
3618                $memoized = 0;
3619
3620                Memoize::unmemoize 'lookup_svn_merge';
3621                Memoize::unmemoize 'check_cherry_pick';
3622                Memoize::unmemoize 'has_no_changes';
3623        }
3624
3625        Memoize::memoize 'Git::SVN::repos_root';
3626}
3627
3628END {
3629        # Force cache writeout explicitly instead of waiting for
3630        # global destruction to avoid segfault in Storable:
3631        # http://rt.cpan.org/Public/Bug/Display.html?id=36087
3632        unmemoize_svn_mergeinfo_functions();
3633}
3634
3635sub parents_exclude {
3636        my $parents = shift;
3637        my @commits = @_;
3638        return unless @commits;
3639
3640        my @excluded;
3641        my $excluded;
3642        do {
3643                my @cmd = ('rev-list', "-1", @commits, "--not", @$parents );
3644                $excluded = command_oneline(@cmd);
3645                if ( $excluded ) {
3646                        my @new;
3647                        my $found;
3648                        for my $commit ( @commits ) {
3649                                if ( $commit eq $excluded ) {
3650                                        push @excluded, $commit;
3651                                        $found++;
3652                                        last;
3653                                }
3654                                else {
3655                                        push @new, $commit;
3656                                }
3657                        }
3658                        die "saw commit '$excluded' in rev-list output, "
3659                                ."but we didn't ask for that commit (wanted: @commits --not @$parents)"
3660                                        unless $found;
3661                        @commits = @new;
3662                }
3663        }
3664                while ($excluded and @commits);
3665
3666        return @excluded;
3667}
3668
3669
3670# note: this function should only be called if the various dirprops
3671# have actually changed
3672sub find_extra_svn_parents {
3673        my ($self, $ed, $mergeinfo, $parents) = @_;
3674        # aha!  svk:merge property changed...
3675
3676        memoize_svn_mergeinfo_functions();
3677
3678        # We first search for merged tips which are not in our
3679        # history.  Then, we figure out which git revisions are in
3680        # that tip, but not this revision.  If all of those revisions
3681        # are now marked as merge, we can add the tip as a parent.
3682        my @merges = split "\n", $mergeinfo;
3683        my @merge_tips;
3684        my $url = $self->{url};
3685        my $uuid = $self->ra_uuid;
3686        my %ranges;
3687        for my $merge ( @merges ) {
3688                my ($tip_commit, @ranges) =
3689                        lookup_svn_merge( $uuid, $url, $merge );
3690                unless (!$tip_commit or
3691                                grep { $_ eq $tip_commit } @$parents ) {
3692                        push @merge_tips, $tip_commit;
3693                        $ranges{$tip_commit} = \@ranges;
3694                } else {
3695                        push @merge_tips, undef;
3696                }
3697        }
3698
3699        my %excluded = map { $_ => 1 }
3700                parents_exclude($parents, grep { defined } @merge_tips);
3701
3702        # check merge tips for new parents
3703        my @new_parents;
3704        for my $merge_tip ( @merge_tips ) {
3705                my $spec = shift @merges;
3706                next unless $merge_tip and $excluded{$merge_tip};
3707
3708                my $ranges = $ranges{$merge_tip};
3709
3710                # check out 'new' tips
3711                my $merge_base;
3712                eval {
3713                        $merge_base = command_oneline(
3714                                "merge-base",
3715                                @$parents, $merge_tip,
3716                        );
3717                };
3718                if ($@) {
3719                        die "An error occurred during merge-base"
3720                                unless $@->isa("Git::Error::Command");
3721
3722                        warn "W: Cannot find common ancestor between ".
3723                             "@$parents and $merge_tip. Ignoring merge info.\n";
3724                        next;
3725                }
3726
3727                # double check that there are no missing non-merge commits
3728                my (@incomplete) = check_cherry_pick(
3729                        $merge_base, $merge_tip,
3730                        $parents,
3731                        @$ranges,
3732                       );
3733
3734                if ( @incomplete ) {
3735                        warn "W:svn cherry-pick ignored ($spec) - missing "
3736                                .@incomplete." commit(s) (eg $incomplete[0])\n";
3737                } else {
3738                        warn
3739                                "Found merge parent (svn:mergeinfo prop): ",
3740                                        $merge_tip, "\n";
3741                        push @new_parents, $merge_tip;
3742                }
3743        }
3744
3745        # cater for merges which merge commits from multiple branches
3746        if ( @new_parents > 1 ) {
3747                for ( my $i = 0; $i <= $#new_parents; $i++ ) {
3748                        for ( my $j = 0; $j <= $#new_parents; $j++ ) {
3749                                next if $i == $j;
3750                                next unless $new_parents[$i];
3751                                next unless $new_parents[$j];
3752                                my $revs = command_oneline(
3753                                        "rev-list", "-1",
3754                                        "$new_parents[$i]..$new_parents[$j]",
3755                                       );
3756                                if ( !$revs ) {
3757                                        undef($new_parents[$j]);
3758                                }
3759                        }
3760                }
3761        }
3762        push @$parents, grep { defined } @new_parents;
3763}
3764
3765sub make_log_entry {
3766        my ($self, $rev, $parents, $ed) = @_;
3767        my $untracked = $self->get_untracked($ed);
3768
3769        my @parents = @$parents;
3770        my $ps = $ed->{path_strip} || "";
3771        for my $path ( grep { m/$ps/ } %{$ed->{dir_prop}} ) {
3772                my $props = $ed->{dir_prop}{$path};
3773                if ( $props->{"svk:merge"} ) {
3774                        $self->find_extra_svk_parents
3775                                ($ed, $props->{"svk:merge"}, \@parents);
3776                }
3777                if ( $props->{"svn:mergeinfo"} ) {
3778                        $self->find_extra_svn_parents
3779                                ($ed,
3780                                 $props->{"svn:mergeinfo"},
3781                                 \@parents);
3782                }
3783        }
3784
3785        open my $un, '>>', "$self->{dir}/unhandled.log" or croak $!;
3786        print $un "r$rev\n" or croak $!;
3787        print $un $_, "\n" foreach @$untracked;
3788        my %log_entry = ( parents => \@parents, revision => $rev,
3789                          log => '');
3790
3791        my $headrev;
3792        my $logged = delete $self->{logged_rev_props};
3793        if (!$logged || $self->{-want_revprops}) {
3794                my $rp = $self->ra->rev_proplist($rev);
3795                foreach (sort keys %$rp) {
3796                        my $v = $rp->{$_};
3797                        if (/^svn:(author|date|log)$/) {
3798                                $log_entry{$1} = $v;
3799                        } elsif ($_ eq 'svm:headrev') {
3800                                $headrev = $v;
3801                        } else {
3802                                print $un "  rev_prop: ", uri_encode($_), ' ',
3803                                          uri_encode($v), "\n";
3804                        }
3805                }
3806        } else {
3807                map { $log_entry{$_} = $logged->{$_} } keys %$logged;
3808        }
3809        close $un or croak $!;
3810
3811        $log_entry{date} = parse_svn_date($log_entry{date});
3812        $log_entry{log} .= "\n";
3813        my $author = $log_entry{author} = check_author($log_entry{author});
3814        my ($name, $email) = defined $::users{$author} ? @{$::users{$author}}
3815                                                       : ($author, undef);
3816
3817        my ($commit_name, $commit_email) = ($name, $email);
3818        if ($_use_log_author) {
3819                my $name_field;
3820                if ($log_entry{log} =~ /From:\s+(.*\S)\s*\n/i) {
3821                        $name_field = $1;
3822                } elsif ($log_entry{log} =~ /Signed-off-by:\s+(.*\S)\s*\n/i) {
3823                        $name_field = $1;
3824                }
3825                if (!defined $name_field) {
3826                        if (!defined $email) {
3827                                $email = $name;
3828                        }
3829                } elsif ($name_field =~ /(.*?)\s+<(.*)>/) {
3830                        ($name, $email) = ($1, $2);
3831                } elsif ($name_field =~ /(.*)@/) {
3832                        ($name, $email) = ($1, $name_field);
3833                } else {
3834                        ($name, $email) = ($name_field, $name_field);
3835                }
3836        }
3837        if (defined $headrev && $self->use_svm_props) {
3838                if ($self->rewrite_root) {
3839                        die "Can't have both 'useSvmProps' and 'rewriteRoot' ",
3840                            "options set!\n";
3841                }
3842                if ($self->rewrite_uuid) {
3843                        die "Can't have both 'useSvmProps' and 'rewriteUUID' ",
3844                            "options set!\n";
3845                }
3846                my ($uuid, $r) = $headrev =~ m{^([a-f\d\-]{30,}):(\d+)$}i;
3847                # we don't want "SVM: initializing mirror for junk" ...
3848                return undef if $r == 0;
3849                my $svm = $self->svm;
3850                if ($uuid ne $svm->{uuid}) {
3851                        die "UUID mismatch on SVM path:\n",
3852                            "expected: $svm->{uuid}\n",
3853                            "     got: $uuid\n";
3854                }
3855                my $full_url = $self->full_url;
3856                $full_url =~ s#^\Q$svm->{replace}\E(/|$)#$svm->{source}$1# or
3857                             die "Failed to replace '$svm->{replace}' with ",
3858                                 "'$svm->{source}' in $full_url\n";
3859                # throw away username for storing in records
3860                remove_username($full_url);
3861                $log_entry{metadata} = "$full_url\@$r $uuid";
3862                $log_entry{svm_revision} = $r;
3863                $email ||= "$author\@$uuid";
3864                $commit_email ||= "$author\@$uuid";
3865        } elsif ($self->use_svnsync_props) {
3866                my $full_url = $self->svnsync->{url};
3867                $full_url .= "/$self->{path}" if length $self->{path};
3868                remove_username($full_url);
3869                my $uuid = $self->svnsync->{uuid};
3870                $log_entry{metadata} = "$full_url\@$rev $uuid";
3871                $email ||= "$author\@$uuid";
3872                $commit_email ||= "$author\@$uuid";
3873        } else {
3874                my $url = $self->metadata_url;
3875                remove_username($url);
3876                my $uuid = $self->rewrite_uuid || $self->ra->get_uuid;
3877                $log_entry{metadata} = "$url\@$rev " . $uuid;
3878                $email ||= "$author\@" . $uuid;
3879                $commit_email ||= "$author\@" . $uuid;
3880        }
3881        $log_entry{name} = $name;
3882        $log_entry{email} = $email;
3883        $log_entry{commit_name} = $commit_name;
3884        $log_entry{commit_email} = $commit_email;
3885        \%log_entry;
3886}
3887
3888sub fetch {
3889        my ($self, $min_rev, $max_rev, @parents) = @_;
3890        my ($last_rev, $last_commit) = $self->last_rev_commit;
3891        my ($base, $head) = $self->get_fetch_range($min_rev, $max_rev);
3892        $self->ra->gs_fetch_loop_common($base, $head, [$self]);
3893}
3894
3895sub set_tree_cb {
3896        my ($self, $log_entry, $tree, $rev, $date, $author) = @_;
3897        $self->{inject_parents} = { $rev => $tree };
3898        $self->fetch(undef, undef);
3899}
3900
3901sub set_tree {
3902        my ($self, $tree) = (shift, shift);
3903        my $log_entry = ::get_commit_entry($tree);
3904        unless ($self->{last_rev}) {
3905                ::fatal("Must have an existing revision to commit");
3906        }
3907        my %ed_opts = ( r => $self->{last_rev},
3908                        log => $log_entry->{log},
3909                        ra => $self->ra,
3910                        tree_a => $self->{last_commit},
3911                        tree_b => $tree,
3912                        editor_cb => sub {
3913                               $self->set_tree_cb($log_entry, $tree, @_) },
3914                        svn_path => $self->{path} );
3915        if (!Git::SVN::Editor->new(\%ed_opts)->apply_diff) {
3916                print "No changes\nr$self->{last_rev} = $tree\n";
3917        }
3918}
3919
3920sub rebuild_from_rev_db {
3921        my ($self, $path) = @_;
3922        my $r = -1;
3923        open my $fh, '<', $path or croak "open: $!";
3924        binmode $fh or croak "binmode: $!";
3925        while (<$fh>) {
3926                length($_) == 41 or croak "inconsistent size in ($_) != 41";
3927                chomp($_);
3928                ++$r;
3929                next if $_ eq ('0' x 40);
3930                $self->rev_map_set($r, $_);
3931                print "r$r = $_\n";
3932        }
3933        close $fh or croak "close: $!";
3934        unlink $path or croak "unlink: $!";
3935}
3936
3937sub rebuild {
3938        my ($self) = @_;
3939        my $map_path = $self->map_path;
3940        my $partial = (-e $map_path && ! -z $map_path);
3941        return unless ::verify_ref($self->refname.'^0');
3942        if (!$partial && ($self->use_svm_props || $self->no_metadata)) {
3943                my $rev_db = $self->rev_db_path;
3944                $self->rebuild_from_rev_db($rev_db);
3945                if ($self->use_svm_props) {
3946                        my $svm_rev_db = $self->rev_db_path($self->svm_uuid);
3947                        $self->rebuild_from_rev_db($svm_rev_db);
3948                }
3949                $self->unlink_rev_db_symlink;
3950                return;
3951        }
3952        print "Rebuilding $map_path ...\n" if (!$partial);
3953        my ($base_rev, $head) = ($partial ? $self->rev_map_max_norebuild(1) :
3954                (undef, undef));
3955        my ($log, $ctx) =
3956            command_output_pipe(qw/rev-list --pretty=raw --reverse/,
3957                                ($head ? "$head.." : "") . $self->refname,
3958                                '--');
3959        my $metadata_url = $self->metadata_url;
3960        remove_username($metadata_url);
3961        my $svn_uuid = $self->rewrite_uuid || $self->ra_uuid;
3962        my $c;
3963        while (<$log>) {
3964                if ( m{^commit ($::sha1)$} ) {
3965                        $c = $1;
3966                        next;
3967                }
3968                next unless s{^\s*(git-svn-id:)}{$1};
3969                my ($url, $rev, $uuid) = ::extract_metadata($_);
3970                remove_username($url);
3971
3972                # ignore merges (from set-tree)
3973                next if (!defined $rev || !$uuid);
3974
3975                # if we merged or otherwise started elsewhere, this is
3976                # how we break out of it
3977                if (($uuid ne $svn_uuid) ||
3978                    ($metadata_url && $url && ($url ne $metadata_url))) {
3979                        next;
3980                }
3981                if ($partial && $head) {
3982                        print "Partial-rebuilding $map_path ...\n";
3983                        print "Currently at $base_rev = $head\n";
3984                        $head = undef;
3985                }
3986
3987                $self->rev_map_set($rev, $c);
3988                print "r$rev = $c\n";
3989        }
3990        command_close_pipe($log, $ctx);
3991        print "Done rebuilding $map_path\n" if (!$partial || !$head);
3992        my $rev_db_path = $self->rev_db_path;
3993        if (-f $self->rev_db_path) {
3994                unlink $self->rev_db_path or croak "unlink: $!";
3995        }
3996        $self->unlink_rev_db_symlink;
3997}
3998
3999# rev_map:
4000# Tie::File seems to be prone to offset errors if revisions get sparse,
4001# it's not that fast, either.  Tie::File is also not in Perl 5.6.  So
4002# one of my favorite modules is out :<  Next up would be one of the DBM
4003# modules, but I'm not sure which is most portable...
4004#
4005# This is the replacement for the rev_db format, which was too big
4006# and inefficient for large repositories with a lot of sparse history
4007# (mainly tags)
4008#
4009# The format is this:
4010#   - 24 bytes for every record,
4011#     * 4 bytes for the integer representing an SVN revision number
4012#     * 20 bytes representing the sha1 of a git commit
4013#   - No empty padding records like the old format
4014#     (except the last record, which can be overwritten)
4015#   - new records are written append-only since SVN revision numbers
4016#     increase monotonically
4017#   - lookups on SVN revision number are done via a binary search
4018#   - Piping the file to xxd -c24 is a good way of dumping it for
4019#     viewing or editing (piped back through xxd -r), should the need
4020#     ever arise.
4021#   - The last record can be padding revision with an all-zero sha1
4022#     This is used to optimize fetch performance when using multiple
4023#     "fetch" directives in .git/config
4024#
4025# These files are disposable unless noMetadata or useSvmProps is set
4026
4027sub _rev_map_set {
4028        my ($fh, $rev, $commit) = @_;
4029
4030        binmode $fh or croak "binmode: $!";
4031        my $size = (stat($fh))[7];
4032        ($size % 24) == 0 or croak "inconsistent size: $size";
4033
4034        my $wr_offset = 0;
4035        if ($size > 0) {
4036                sysseek($fh, -24, SEEK_END) or croak "seek: $!";
4037                my $read = sysread($fh, my $buf, 24) or croak "read: $!";
4038                $read == 24 or croak "read only $read bytes (!= 24)";
4039                my ($last_rev, $last_commit) = unpack(rev_map_fmt, $buf);
4040                if ($last_commit eq ('0' x40)) {
4041                        if ($size >= 48) {
4042                                sysseek($fh, -48, SEEK_END) or croak "seek: $!";
4043                                $read = sysread($fh, $buf, 24) or
4044                                    croak "read: $!";
4045                                $read == 24 or
4046                                    croak "read only $read bytes (!= 24)";
4047                                ($last_rev, $last_commit) =
4048                                    unpack(rev_map_fmt, $buf);
4049                                if ($last_commit eq ('0' x40)) {
4050                                        croak "inconsistent .rev_map\n";
4051                                }
4052                        }
4053                        if ($last_rev >= $rev) {
4054                                croak "last_rev is higher!: $last_rev >= $rev";
4055                        }
4056                        $wr_offset = -24;
4057                }
4058        }
4059        sysseek($fh, $wr_offset, SEEK_END) or croak "seek: $!";
4060        syswrite($fh, pack(rev_map_fmt, $rev, $commit), 24) == 24 or
4061          croak "write: $!";
4062}
4063
4064sub _rev_map_reset {
4065        my ($fh, $rev, $commit) = @_;
4066        my $c = _rev_map_get($fh, $rev);
4067        $c eq $commit or die "_rev_map_reset(@_) commit $c does not match!\n";
4068        my $offset = sysseek($fh, 0, SEEK_CUR) or croak "seek: $!";
4069        truncate $fh, $offset or croak "truncate: $!";
4070}
4071
4072sub mkfile {
4073        my ($path) = @_;
4074        unless (-e $path) {
4075                my ($dir, $base) = ($path =~ m#^(.*?)/?([^/]+)$#);
4076                mkpath([$dir]) unless -d $dir;
4077                open my $fh, '>>', $path or die "Couldn't create $path: $!\n";
4078                close $fh or die "Couldn't close (create) $path: $!\n";
4079        }
4080}
4081
4082sub rev_map_set {
4083        my ($self, $rev, $commit, $update_ref, $uuid) = @_;
4084        defined $commit or die "missing arg3\n";
4085        length $commit == 40 or die "arg3 must be a full SHA1 hexsum\n";
4086        my $db = $self->map_path($uuid);
4087        my $db_lock = "$db.lock";
4088        my $sigmask;
4089        $update_ref ||= 0;
4090        if ($update_ref) {
4091                $sigmask = POSIX::SigSet->new();
4092                my $signew = POSIX::SigSet->new(SIGINT, SIGHUP, SIGTERM,
4093                        SIGALRM, SIGUSR1, SIGUSR2);
4094                sigprocmask(SIG_BLOCK, $signew, $sigmask) or
4095                        croak "Can't block signals: $!";
4096        }
4097        mkfile($db);
4098
4099        $LOCKFILES{$db_lock} = 1;
4100        my $sync;
4101        # both of these options make our .rev_db file very, very important
4102        # and we can't afford to lose it because rebuild() won't work
4103        if ($self->use_svm_props || $self->no_metadata) {
4104                $sync = 1;
4105                copy($db, $db_lock) or die "rev_map_set(@_): ",
4106                                           "Failed to copy: ",
4107                                           "$db => $db_lock ($!)\n";
4108        } else {
4109                rename $db, $db_lock or die "rev_map_set(@_): ",
4110                                            "Failed to rename: ",
4111                                            "$db => $db_lock ($!)\n";
4112        }
4113
4114        sysopen(my $fh, $db_lock, O_RDWR | O_CREAT)
4115             or croak "Couldn't open $db_lock: $!\n";
4116        $update_ref eq 'reset' ? _rev_map_reset($fh, $rev, $commit) :
4117                                 _rev_map_set($fh, $rev, $commit);
4118        if ($sync) {
4119                $fh->flush or die "Couldn't flush $db_lock: $!\n";
4120                $fh->sync or die "Couldn't sync $db_lock: $!\n";
4121        }
4122        close $fh or croak $!;
4123        if ($update_ref) {
4124                $_head = $self;
4125                my $note = "";
4126                $note = " ($update_ref)" if ($update_ref !~ /^\d*$/);
4127                command_noisy('update-ref', '-m', "r$rev$note",
4128                              $self->refname, $commit);
4129        }
4130        rename $db_lock, $db or die "rev_map_set(@_): ", "Failed to rename: ",
4131                                    "$db_lock => $db ($!)\n";
4132        delete $LOCKFILES{$db_lock};
4133        if ($update_ref) {
4134                sigprocmask(SIG_SETMASK, $sigmask) or
4135                        croak "Can't restore signal mask: $!";
4136        }
4137}
4138
4139# If want_commit, this will return an array of (rev, commit) where
4140# commit _must_ be a valid commit in the archive.
4141# Otherwise, it'll return the max revision (whether or not the
4142# commit is valid or just a 0x40 placeholder).
4143sub rev_map_max {
4144        my ($self, $want_commit) = @_;
4145        $self->rebuild;
4146        my ($r, $c) = $self->rev_map_max_norebuild($want_commit);
4147        $want_commit ? ($r, $c) : $r;
4148}
4149
4150sub rev_map_max_norebuild {
4151        my ($self, $want_commit) = @_;
4152        my $map_path = $self->map_path;
4153        stat $map_path or return $want_commit ? (0, undef) : 0;
4154        sysopen(my $fh, $map_path, O_RDONLY) or croak "open: $!";
4155        binmode $fh or croak "binmode: $!";
4156        my $size = (stat($fh))[7];
4157        ($size % 24) == 0 or croak "inconsistent size: $size";
4158
4159        if ($size == 0) {
4160                close $fh or croak "close: $!";
4161                return $want_commit ? (0, undef) : 0;
4162        }
4163
4164        sysseek($fh, -24, SEEK_END) or croak "seek: $!";
4165        sysread($fh, my $buf, 24) == 24 or croak "read: $!";
4166        my ($r, $c) = unpack(rev_map_fmt, $buf);
4167        if ($want_commit && $c eq ('0' x40)) {
4168                if ($size < 48) {
4169                        return $want_commit ? (0, undef) : 0;
4170                }
4171                sysseek($fh, -48, SEEK_END) or croak "seek: $!";
4172                sysread($fh, $buf, 24) == 24 or croak "read: $!";
4173                ($r, $c) = unpack(rev_map_fmt, $buf);
4174                if ($c eq ('0'x40)) {
4175                        croak "Penultimate record is all-zeroes in $map_path";
4176                }
4177        }
4178        close $fh or croak "close: $!";
4179        $want_commit ? ($r, $c) : $r;
4180}
4181
4182sub rev_map_get {
4183        my ($self, $rev, $uuid) = @_;
4184        my $map_path = $self->map_path($uuid);
4185        return undef unless -e $map_path;
4186
4187        sysopen(my $fh, $map_path, O_RDONLY) or croak "open: $!";
4188        my $c = _rev_map_get($fh, $rev);
4189        close($fh) or croak "close: $!";
4190        $c
4191}
4192
4193sub _rev_map_get {
4194        my ($fh, $rev) = @_;
4195
4196        binmode $fh or croak "binmode: $!";
4197        my $size = (stat($fh))[7];
4198        ($size % 24) == 0 or croak "inconsistent size: $size";
4199
4200        if ($size == 0) {
4201                return undef;
4202        }
4203
4204        my ($l, $u) = (0, $size - 24);
4205        my ($r, $c, $buf);
4206
4207        while ($l <= $u) {
4208                my $i = int(($l/24 + $u/24) / 2) * 24;
4209                sysseek($fh, $i, SEEK_SET) or croak "seek: $!";
4210                sysread($fh, my $buf, 24) == 24 or croak "read: $!";
4211                my ($r, $c) = unpack(rev_map_fmt, $buf);
4212
4213                if ($r < $rev) {
4214                        $l = $i + 24;
4215                } elsif ($r > $rev) {
4216                        $u = $i - 24;
4217                } else { # $r == $rev
4218                        return $c eq ('0' x 40) ? undef : $c;
4219                }
4220        }
4221        undef;
4222}
4223
4224# Finds the first svn revision that exists on (if $eq_ok is true) or
4225# before $rev for the current branch.  It will not search any lower
4226# than $min_rev.  Returns the git commit hash and svn revision number
4227# if found, else (undef, undef).
4228sub find_rev_before {
4229        my ($self, $rev, $eq_ok, $min_rev) = @_;
4230        --$rev unless $eq_ok;
4231        $min_rev ||= 1;
4232        my $max_rev = $self->rev_map_max;
4233        $rev = $max_rev if ($rev > $max_rev);
4234        while ($rev >= $min_rev) {
4235                if (my $c = $self->rev_map_get($rev)) {
4236                        return ($rev, $c);
4237                }
4238                --$rev;
4239        }
4240        return (undef, undef);
4241}
4242
4243# Finds the first svn revision that exists on (if $eq_ok is true) or
4244# after $rev for the current branch.  It will not search any higher
4245# than $max_rev.  Returns the git commit hash and svn revision number
4246# if found, else (undef, undef).
4247sub find_rev_after {
4248        my ($self, $rev, $eq_ok, $max_rev) = @_;
4249        ++$rev unless $eq_ok;
4250        $max_rev ||= $self->rev_map_max;
4251        while ($rev <= $max_rev) {
4252                if (my $c = $self->rev_map_get($rev)) {
4253                        return ($rev, $c);
4254                }
4255                ++$rev;
4256        }
4257        return (undef, undef);
4258}
4259
4260sub _new {
4261        my ($class, $repo_id, $ref_id, $path) = @_;
4262        unless (defined $repo_id && length $repo_id) {
4263                $repo_id = $Git::SVN::default_repo_id;
4264        }
4265        unless (defined $ref_id && length $ref_id) {
4266                $_prefix = '' unless defined($_prefix);
4267                $_[2] = $ref_id =
4268                             "refs/remotes/$_prefix$Git::SVN::default_ref_id";
4269        }
4270        $_[1] = $repo_id;
4271        my $dir = "$ENV{GIT_DIR}/svn/$ref_id";
4272
4273        # Older repos imported by us used $GIT_DIR/svn/foo instead of
4274        # $GIT_DIR/svn/refs/remotes/foo when tracking refs/remotes/foo
4275        if ($ref_id =~ m{^refs/remotes/(.*)}) {
4276                my $old_dir = "$ENV{GIT_DIR}/svn/$1";
4277                if (-d $old_dir && ! -d $dir) {
4278                        $dir = $old_dir;
4279                }
4280        }
4281
4282        $_[3] = $path = '' unless (defined $path);
4283        mkpath([$dir]);
4284        bless {
4285                ref_id => $ref_id, dir => $dir, index => "$dir/index",
4286                path => $path, config => "$ENV{GIT_DIR}/svn/config",
4287                map_root => "$dir/.rev_map", repo_id => $repo_id }, $class;
4288}
4289
4290# for read-only access of old .rev_db formats
4291sub unlink_rev_db_symlink {
4292        my ($self) = @_;
4293        my $link = $self->rev_db_path;
4294        $link =~ s/\.[\w-]+$// or croak "missing UUID at the end of $link";
4295        if (-l $link) {
4296                unlink $link or croak "unlink: $link failed!";
4297        }
4298}
4299
4300sub rev_db_path {
4301        my ($self, $uuid) = @_;
4302        my $db_path = $self->map_path($uuid);
4303        $db_path =~ s{/\.rev_map\.}{/\.rev_db\.}
4304            or croak "map_path: $db_path does not contain '/.rev_map.' !";
4305        $db_path;
4306}
4307
4308# the new replacement for .rev_db
4309sub map_path {
4310        my ($self, $uuid) = @_;
4311        $uuid ||= $self->ra_uuid;
4312        "$self->{map_root}.$uuid";
4313}
4314
4315sub uri_encode {
4316        my ($f) = @_;
4317        $f =~ s#([^a-zA-Z0-9\*!\:_\./\-])#uc sprintf("%%%02x",ord($1))#eg;
4318        $f
4319}
4320
4321sub uri_decode {
4322        my ($f) = @_;
4323        $f =~ s#%([0-9a-fA-F]{2})#chr(hex($1))#eg;
4324        $f
4325}
4326
4327sub remove_username {
4328        $_[0] =~ s{^([^:]*://)[^@]+@}{$1};
4329}
4330
4331package Git::SVN::Editor;
4332use vars qw/@ISA $_rmdir $_cp_similarity $_find_copies_harder $_rename_limit/;
4333use strict;
4334use warnings;
4335use Carp qw/croak/;
4336use IO::File;
4337
4338sub new {
4339        my ($class, $opts) = @_;
4340        foreach (qw/svn_path r ra tree_a tree_b log editor_cb/) {
4341                die "$_ required!\n" unless (defined $opts->{$_});
4342        }
4343
4344        my $pool = SVN::Pool->new;
4345        my $mods = generate_diff($opts->{tree_a}, $opts->{tree_b});
4346        my $types = check_diff_paths($opts->{ra}, $opts->{svn_path},
4347                                     $opts->{r}, $mods);
4348
4349        # $opts->{ra} functions should not be used after this:
4350        my @ce  = $opts->{ra}->get_commit_editor($opts->{log},
4351                                                $opts->{editor_cb}, $pool);
4352        my $self = SVN::Delta::Editor->new(@ce, $pool);
4353        bless $self, $class;
4354        foreach (qw/svn_path r tree_a tree_b/) {
4355                $self->{$_} = $opts->{$_};
4356        }
4357        $self->{url} = $opts->{ra}->{url};
4358        $self->{mods} = $mods;
4359        $self->{types} = $types;
4360        $self->{pool} = $pool;
4361        $self->{bat} = { '' => $self->open_root($self->{r}, $self->{pool}) };
4362        $self->{rm} = { };
4363        $self->{path_prefix} = length $self->{svn_path} ?
4364                               "$self->{svn_path}/" : '';
4365        $self->{config} = $opts->{config};
4366        $self->{mergeinfo} = $opts->{mergeinfo};
4367        return $self;
4368}
4369
4370sub generate_diff {
4371        my ($tree_a, $tree_b) = @_;
4372        my @diff_tree = qw(diff-tree -z -r);
4373        if ($_cp_similarity) {
4374                push @diff_tree, "-C$_cp_similarity";
4375        } else {
4376                push @diff_tree, '-C';
4377        }
4378        push @diff_tree, '--find-copies-harder' if $_find_copies_harder;
4379        push @diff_tree, "-l$_rename_limit" if defined $_rename_limit;
4380        push @diff_tree, $tree_a, $tree_b;
4381        my ($diff_fh, $ctx) = command_output_pipe(@diff_tree);
4382        local $/ = "\0";
4383        my $state = 'meta';
4384        my @mods;
4385        while (<$diff_fh>) {
4386                chomp $_; # this gets rid of the trailing "\0"
4387                if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s
4388                                        ($::sha1)\s($::sha1)\s
4389                                        ([MTCRAD])\d*$/xo) {
4390                        push @mods, {   mode_a => $1, mode_b => $2,
4391                                        sha1_a => $3, sha1_b => $4,
4392                                        chg => $5 };
4393                        if ($5 =~ /^(?:C|R)$/) {
4394                                $state = 'file_a';
4395                        } else {
4396                                $state = 'file_b';
4397                        }
4398                } elsif ($state eq 'file_a') {
4399                        my $x = $mods[$#mods] or croak "Empty array\n";
4400                        if ($x->{chg} !~ /^(?:C|R)$/) {
4401                                croak "Error parsing $_, $x->{chg}\n";
4402                        }
4403                        $x->{file_a} = $_;
4404                        $state = 'file_b';
4405                } elsif ($state eq 'file_b') {
4406                        my $x = $mods[$#mods] or croak "Empty array\n";
4407                        if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) {
4408                                croak "Error parsing $_, $x->{chg}\n";
4409                        }
4410                        if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) {
4411                                croak "Error parsing $_, $x->{chg}\n";
4412                        }
4413                        $x->{file_b} = $_;
4414                        $state = 'meta';
4415                } else {
4416                        croak "Error parsing $_\n";
4417                }
4418        }
4419        command_close_pipe($diff_fh, $ctx);
4420        \@mods;
4421}
4422
4423sub check_diff_paths {
4424        my ($ra, $pfx, $rev, $mods) = @_;
4425        my %types;
4426        $pfx .= '/' if length $pfx;
4427
4428        sub type_diff_paths {
4429                my ($ra, $types, $path, $rev) = @_;
4430                my @p = split m#/+#, $path;
4431                my $c = shift @p;
4432                unless (defined $types->{$c}) {
4433                        $types->{$c} = $ra->check_path($c, $rev);
4434                }
4435                while (@p) {
4436                        $c .= '/' . shift @p;
4437                        next if defined $types->{$c};
4438                        $types->{$c} = $ra->check_path($c, $rev);
4439                }
4440        }
4441
4442        foreach my $m (@$mods) {
4443                foreach my $f (qw/file_a file_b/) {
4444                        next unless defined $m->{$f};
4445                        my ($dir) = ($m->{$f} =~ m#^(.*?)/?(?:[^/]+)$#);
4446                        if (length $pfx.$dir && ! defined $types{$dir}) {
4447                                type_diff_paths($ra, \%types, $pfx.$dir, $rev);
4448                        }
4449                }
4450        }
4451        \%types;
4452}
4453
4454sub split_path {
4455        return ($_[0] =~ m#^(.*?)/?([^/]+)$#);
4456}
4457
4458sub repo_path {
4459        my ($self, $path) = @_;
4460        if (my $enc = $self->{pathnameencoding}) {
4461                require Encode;
4462                Encode::from_to($path, $enc, 'UTF-8');
4463        }
4464        $self->{path_prefix}.(defined $path ? $path : '');
4465}
4466
4467sub url_path {
4468        my ($self, $path) = @_;
4469        if ($self->{url} =~ m#^https?://#) {
4470                $path =~ s!([^~a-zA-Z0-9_./-])!uc sprintf("%%%02x",ord($1))!eg;
4471        }
4472        $self->{url} . '/' . $self->repo_path($path);
4473}
4474
4475sub rmdirs {
4476        my ($self) = @_;
4477        my $rm = $self->{rm};
4478        delete $rm->{''}; # we never delete the url we're tracking
4479        return unless %$rm;
4480
4481        foreach (keys %$rm) {
4482                my @d = split m#/#, $_;
4483                my $c = shift @d;
4484                $rm->{$c} = 1;
4485                while (@d) {
4486                        $c .= '/' . shift @d;
4487                        $rm->{$c} = 1;
4488                }
4489        }
4490        delete $rm->{$self->{svn_path}};
4491        delete $rm->{''}; # we never delete the url we're tracking
4492        return unless %$rm;
4493
4494        my ($fh, $ctx) = command_output_pipe(qw/ls-tree --name-only -r -z/,
4495                                             $self->{tree_b});
4496        local $/ = "\0";
4497        while (<$fh>) {
4498                chomp;
4499                my @dn = split m#/#, $_;
4500                while (pop @dn) {
4501                        delete $rm->{join '/', @dn};
4502                }
4503                unless (%$rm) {
4504                        close $fh;
4505                        return;
4506                }
4507        }
4508        command_close_pipe($fh, $ctx);
4509
4510        my ($r, $p, $bat) = ($self->{r}, $self->{pool}, $self->{bat});
4511        foreach my $d (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$rm) {
4512                $self->close_directory($bat->{$d}, $p);
4513                my ($dn) = ($d =~ m#^(.*?)/?(?:[^/]+)$#);
4514                print "\tD+\t$d/\n" unless $::_q;
4515                $self->SUPER::delete_entry($d, $r, $bat->{$dn}, $p);
4516                delete $bat->{$d};
4517        }
4518}
4519
4520sub open_or_add_dir {
4521        my ($self, $full_path, $baton, $deletions) = @_;
4522        my $t = $self->{types}->{$full_path};
4523        if (!defined $t) {
4524                die "$full_path not known in r$self->{r} or we have a bug!\n";
4525        }
4526        {
4527                no warnings 'once';
4528                # SVN::Node::none and SVN::Node::file are used only once,
4529                # so we're shutting up Perl's warnings about them.
4530                if ($t == $SVN::Node::none || defined($deletions->{$full_path})) {
4531                        return $self->add_directory($full_path, $baton,
4532                            undef, -1, $self->{pool});
4533                } elsif ($t == $SVN::Node::dir) {
4534                        return $self->open_directory($full_path, $baton,
4535                            $self->{r}, $self->{pool});
4536                } # no warnings 'once'
4537                print STDERR "$full_path already exists in repository at ",
4538                    "r$self->{r} and it is not a directory (",
4539                    ($t == $SVN::Node::file ? 'file' : 'unknown'),"/$t)\n";
4540        } # no warnings 'once'
4541        exit 1;
4542}
4543
4544sub ensure_path {
4545        my ($self, $path, $deletions) = @_;
4546        my $bat = $self->{bat};
4547        my $repo_path = $self->repo_path($path);
4548        return $bat->{''} unless (length $repo_path);
4549
4550        my @p = split m#/+#, $repo_path;
4551        my $c = shift @p;
4552        $bat->{$c} ||= $self->open_or_add_dir($c, $bat->{''}, $deletions);
4553        while (@p) {
4554                my $c0 = $c;
4555                $c .= '/' . shift @p;
4556                $bat->{$c} ||= $self->open_or_add_dir($c, $bat->{$c0}, $deletions);
4557        }
4558        return $bat->{$c};
4559}
4560
4561# Subroutine to convert a globbing pattern to a regular expression.
4562# From perl cookbook.
4563sub glob2pat {
4564        my $globstr = shift;
4565        my %patmap = ('*' => '.*', '?' => '.', '[' => '[', ']' => ']');
4566        $globstr =~ s{(.)} { $patmap{$1} || "\Q$1" }ge;
4567        return '^' . $globstr . '$';
4568}
4569
4570sub check_autoprop {
4571        my ($self, $pattern, $properties, $file, $fbat) = @_;
4572        # Convert the globbing pattern to a regular expression.
4573        my $regex = glob2pat($pattern);
4574        # Check if the pattern matches the file name.
4575        if($file =~ m/($regex)/) {
4576                # Parse the list of properties to set.
4577                my @props = split(/;/, $properties);
4578                foreach my $prop (@props) {
4579                        # Parse 'name=value' syntax and set the property.
4580                        if ($prop =~ /([^=]+)=(.*)/) {
4581                                my ($n,$v) = ($1,$2);
4582                                for ($n, $v) {
4583                                        s/^\s+//; s/\s+$//;
4584                                }
4585                                $self->change_file_prop($fbat, $n, $v);
4586                        }
4587                }
4588        }
4589}
4590
4591sub apply_autoprops {
4592        my ($self, $file, $fbat) = @_;
4593        my $conf_t = ${$self->{config}}{'config'};
4594        no warnings 'once';
4595        # Check [miscellany]/enable-auto-props in svn configuration.
4596        if (SVN::_Core::svn_config_get_bool(
4597                $conf_t,
4598                $SVN::_Core::SVN_CONFIG_SECTION_MISCELLANY,
4599                $SVN::_Core::SVN_CONFIG_OPTION_ENABLE_AUTO_PROPS,
4600                0)) {
4601                # Auto-props are enabled.  Enumerate them to look for matches.
4602                my $callback = sub {
4603                        $self->check_autoprop($_[0], $_[1], $file, $fbat);
4604                };
4605                SVN::_Core::svn_config_enumerate(
4606                        $conf_t,
4607                        $SVN::_Core::SVN_CONFIG_SECTION_AUTO_PROPS,
4608                        $callback);
4609        }
4610}
4611
4612sub A {
4613        my ($self, $m, $deletions) = @_;
4614        my ($dir, $file) = split_path($m->{file_b});
4615        my $pbat = $self->ensure_path($dir, $deletions);
4616        my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
4617                                        undef, -1);
4618        print "\tA\t$m->{file_b}\n" unless $::_q;
4619        $self->apply_autoprops($file, $fbat);
4620        $self->chg_file($fbat, $m);
4621        $self->close_file($fbat,undef,$self->{pool});
4622}
4623
4624sub C {
4625        my ($self, $m, $deletions) = @_;
4626        my ($dir, $file) = split_path($m->{file_b});
4627        my $pbat = $self->ensure_path($dir, $deletions);
4628        my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
4629                                $self->url_path($m->{file_a}), $self->{r});
4630        print "\tC\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
4631        $self->chg_file($fbat, $m);
4632        $self->close_file($fbat,undef,$self->{pool});
4633}
4634
4635sub delete_entry {
4636        my ($self, $path, $pbat) = @_;
4637        my $rpath = $self->repo_path($path);
4638        my ($dir, $file) = split_path($rpath);
4639        $self->{rm}->{$dir} = 1;
4640        $self->SUPER::delete_entry($rpath, $self->{r}, $pbat, $self->{pool});
4641}
4642
4643sub R {
4644        my ($self, $m, $deletions) = @_;
4645        my ($dir, $file) = split_path($m->{file_b});
4646        my $pbat = $self->ensure_path($dir, $deletions);
4647        my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
4648                                $self->url_path($m->{file_a}), $self->{r});
4649        print "\tR\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
4650        $self->apply_autoprops($file, $fbat);
4651        $self->chg_file($fbat, $m);
4652        $self->close_file($fbat,undef,$self->{pool});
4653
4654        ($dir, $file) = split_path($m->{file_a});
4655        $pbat = $self->ensure_path($dir, $deletions);
4656        $self->delete_entry($m->{file_a}, $pbat);
4657}
4658
4659sub M {
4660        my ($self, $m, $deletions) = @_;
4661        my ($dir, $file) = split_path($m->{file_b});
4662        my $pbat = $self->ensure_path($dir, $deletions);
4663        my $fbat = $self->open_file($self->repo_path($m->{file_b}),
4664                                $pbat,$self->{r},$self->{pool});
4665        print "\t$m->{chg}\t$m->{file_b}\n" unless $::_q;
4666        $self->chg_file($fbat, $m);
4667        $self->close_file($fbat,undef,$self->{pool});
4668}
4669
4670sub T { shift->M(@_) }
4671
4672sub change_file_prop {
4673        my ($self, $fbat, $pname, $pval) = @_;
4674        $self->SUPER::change_file_prop($fbat, $pname, $pval, $self->{pool});
4675}
4676
4677sub change_dir_prop {
4678        my ($self, $pbat, $pname, $pval) = @_;
4679        $self->SUPER::change_dir_prop($pbat, $pname, $pval, $self->{pool});
4680}
4681
4682sub _chg_file_get_blob ($$$$) {
4683        my ($self, $fbat, $m, $which) = @_;
4684        my $fh = $::_repository->temp_acquire("git_blob_$which");
4685        if ($m->{"mode_$which"} =~ /^120/) {
4686                print $fh 'link ' or croak $!;
4687                $self->change_file_prop($fbat,'svn:special','*');
4688        } elsif ($m->{mode_a} =~ /^120/ && $m->{"mode_$which"} !~ /^120/) {
4689                $self->change_file_prop($fbat,'svn:special',undef);
4690        }
4691        my $blob = $m->{"sha1_$which"};
4692        return ($fh,) if ($blob =~ /^0{40}$/);
4693        my $size = $::_repository->cat_blob($blob, $fh);
4694        croak "Failed to read object $blob" if ($size < 0);
4695        $fh->flush == 0 or croak $!;
4696        seek $fh, 0, 0 or croak $!;
4697
4698        my $exp = ::md5sum($fh);
4699        seek $fh, 0, 0 or croak $!;
4700        return ($fh, $exp);
4701}
4702
4703sub chg_file {
4704        my ($self, $fbat, $m) = @_;
4705        if ($m->{mode_b} =~ /755$/ && $m->{mode_a} !~ /755$/) {
4706                $self->change_file_prop($fbat,'svn:executable','*');
4707        } elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) {
4708                $self->change_file_prop($fbat,'svn:executable',undef);
4709        }
4710        my ($fh_a, $exp_a) = _chg_file_get_blob $self, $fbat, $m, 'a';
4711        my ($fh_b, $exp_b) = _chg_file_get_blob $self, $fbat, $m, 'b';
4712        my $pool = SVN::Pool->new;
4713        my $atd = $self->apply_textdelta($fbat, $exp_a, $pool);
4714        if (-s $fh_a) {
4715                my $txstream = SVN::TxDelta::new ($fh_a, $fh_b, $pool);
4716                my $res = SVN::TxDelta::send_txstream($txstream, @$atd, $pool);
4717                if (defined $res) {
4718                        die "Unexpected result from send_txstream: $res\n",
4719                            "(SVN::Core::VERSION: $SVN::Core::VERSION)\n";
4720                }
4721        } else {
4722                my $got = SVN::TxDelta::send_stream($fh_b, @$atd, $pool);
4723                die "Checksum mismatch\nexpected: $exp_b\ngot: $got\n"
4724                    if ($got ne $exp_b);
4725        }
4726        Git::temp_release($fh_b, 1);
4727        Git::temp_release($fh_a, 1);
4728        $pool->clear;
4729}
4730
4731sub D {
4732        my ($self, $m, $deletions) = @_;
4733        my ($dir, $file) = split_path($m->{file_b});
4734        my $pbat = $self->ensure_path($dir, $deletions);
4735        print "\tD\t$m->{file_b}\n" unless $::_q;
4736        $self->delete_entry($m->{file_b}, $pbat);
4737}
4738
4739sub close_edit {
4740        my ($self) = @_;
4741        my ($p,$bat) = ($self->{pool}, $self->{bat});
4742        foreach (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$bat) {
4743                next if $_ eq '';
4744                $self->close_directory($bat->{$_}, $p);
4745        }
4746        $self->close_directory($bat->{''}, $p);
4747        $self->SUPER::close_edit($p);
4748        $p->clear;
4749}
4750
4751sub abort_edit {
4752        my ($self) = @_;
4753        $self->SUPER::abort_edit($self->{pool});
4754}
4755
4756sub DESTROY {
4757        my $self = shift;
4758        $self->SUPER::DESTROY(@_);
4759        $self->{pool}->clear;
4760}
4761
4762# this drives the editor
4763sub apply_diff {
4764        my ($self) = @_;
4765        my $mods = $self->{mods};
4766        my %o = ( D => 0, C => 1, R => 2, A => 3, M => 4, T => 5 );
4767        my %deletions;
4768
4769        foreach my $m (@$mods) {
4770                if ($m->{chg} eq "D") {
4771                        $deletions{$m->{file_b}} = 1;
4772                }
4773        }
4774
4775        foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) {
4776                my $f = $m->{chg};
4777                if (defined $o{$f}) {
4778                        $self->$f($m, \%deletions);
4779                } else {
4780                        fatal("Invalid change type: $f");
4781                }
4782        }
4783
4784        if (defined($self->{mergeinfo})) {
4785                $self->change_dir_prop($self->{bat}{''}, "svn:mergeinfo",
4786                                       $self->{mergeinfo});
4787        }
4788        $self->rmdirs if $_rmdir;
4789        if (@$mods == 0 && !defined($self->{mergeinfo})) {
4790                $self->abort_edit;
4791        } else {
4792                $self->close_edit;
4793        }
4794        return scalar @$mods;
4795}
4796
4797package Git::SVN::Ra;
4798use vars qw/@ISA $config_dir $_ignore_refs_regex $_log_window_size/;
4799use strict;
4800use warnings;
4801my ($ra_invalid, $can_do_switch, %ignored_err, $RA);
4802
4803BEGIN {
4804        # enforce temporary pool usage for some simple functions
4805        no strict 'refs';
4806        for my $f (qw/rev_proplist get_latest_revnum get_uuid get_repos_root
4807                      get_file/) {
4808                my $SUPER = "SUPER::$f";
4809                *$f = sub {
4810                        my $self = shift;
4811                        my $pool = SVN::Pool->new;
4812                        my @ret = $self->$SUPER(@_,$pool);
4813                        $pool->clear;
4814                        wantarray ? @ret : $ret[0];
4815                };
4816        }
4817}
4818
4819sub _auth_providers () {
4820        my @rv = (
4821          SVN::Client::get_simple_provider(),
4822          SVN::Client::get_ssl_server_trust_file_provider(),
4823          SVN::Client::get_simple_prompt_provider(
4824            \&Git::SVN::Prompt::simple, 2),
4825          SVN::Client::get_ssl_client_cert_file_provider(),
4826          SVN::Client::get_ssl_client_cert_prompt_provider(
4827            \&Git::SVN::Prompt::ssl_client_cert, 2),
4828          SVN::Client::get_ssl_client_cert_pw_file_provider(),
4829          SVN::Client::get_ssl_client_cert_pw_prompt_provider(
4830            \&Git::SVN::Prompt::ssl_client_cert_pw, 2),
4831          SVN::Client::get_username_provider(),
4832          SVN::Client::get_ssl_server_trust_prompt_provider(
4833            \&Git::SVN::Prompt::ssl_server_trust),
4834          SVN::Client::get_username_prompt_provider(
4835            \&Git::SVN::Prompt::username, 2)
4836        );
4837
4838        # earlier 1.6.x versions would segfault, and <= 1.5.x didn't have
4839        # this function
4840        if (::compare_svn_version('1.6.15') >= 0) {
4841                my $config = SVN::Core::config_get_config($config_dir);
4842                my ($p, @a);
4843                # config_get_config returns all config files from
4844                # ~/.subversion, auth_get_platform_specific_client_providers
4845                # just wants the config "file".
4846                @a = ($config->{'config'}, undef);
4847                $p = SVN::Core::auth_get_platform_specific_client_providers(@a);
4848                # Insert the return value from
4849                # auth_get_platform_specific_providers
4850                unshift @rv, @$p;
4851        }
4852        \@rv;
4853}
4854
4855sub escape_uri_only {
4856        my ($uri) = @_;
4857        my @tmp;
4858        foreach (split m{/}, $uri) {
4859                s/([^~\w.%+-]|%(?![a-fA-F0-9]{2}))/sprintf("%%%02X",ord($1))/eg;
4860                push @tmp, $_;
4861        }
4862        join('/', @tmp);
4863}
4864
4865sub escape_url {
4866        my ($url) = @_;
4867        if ($url =~ m#^(https?)://([^/]+)(.*)$#) {
4868                my ($scheme, $domain, $uri) = ($1, $2, escape_uri_only($3));
4869                $url = "$scheme://$domain$uri";
4870        }
4871        $url;
4872}
4873
4874sub new {
4875        my ($class, $url) = @_;
4876        $url =~ s!/+$!!;
4877        return $RA if ($RA && $RA->{url} eq $url);
4878
4879        ::_req_svn();
4880
4881        SVN::_Core::svn_config_ensure($config_dir, undef);
4882        my ($baton, $callbacks) = SVN::Core::auth_open_helper(_auth_providers);
4883        my $config = SVN::Core::config_get_config($config_dir);
4884        $RA = undef;
4885        my $dont_store_passwords = 1;
4886        my $conf_t = ${$config}{'config'};
4887        {
4888                no warnings 'once';
4889                # The usage of $SVN::_Core::SVN_CONFIG_* variables
4890                # produces warnings that variables are used only once.
4891                # I had not found the better way to shut them up, so
4892                # the warnings of type 'once' are disabled in this block.
4893                if (SVN::_Core::svn_config_get_bool($conf_t,
4894                    $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
4895                    $SVN::_Core::SVN_CONFIG_OPTION_STORE_PASSWORDS,
4896                    1) == 0) {
4897                        SVN::_Core::svn_auth_set_parameter($baton,
4898                            $SVN::_Core::SVN_AUTH_PARAM_DONT_STORE_PASSWORDS,
4899                            bless (\$dont_store_passwords, "_p_void"));
4900                }
4901                if (SVN::_Core::svn_config_get_bool($conf_t,
4902                    $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
4903                    $SVN::_Core::SVN_CONFIG_OPTION_STORE_AUTH_CREDS,
4904                    1) == 0) {
4905                        $Git::SVN::Prompt::_no_auth_cache = 1;
4906                }
4907        } # no warnings 'once'
4908        my $self = SVN::Ra->new(url => escape_url($url), auth => $baton,
4909                              config => $config,
4910                              pool => SVN::Pool->new,
4911                              auth_provider_callbacks => $callbacks);
4912        $self->{url} = $url;
4913        $self->{svn_path} = $url;
4914        $self->{repos_root} = $self->get_repos_root;
4915        $self->{svn_path} =~ s#^\Q$self->{repos_root}\E(/|$)##;
4916        $self->{cache} = { check_path => { r => 0, data => {} },
4917                           get_dir => { r => 0, data => {} } };
4918        $RA = bless $self, $class;
4919}
4920
4921sub check_path {
4922        my ($self, $path, $r) = @_;
4923        my $cache = $self->{cache}->{check_path};
4924        if ($r == $cache->{r} && exists $cache->{data}->{$path}) {
4925                return $cache->{data}->{$path};
4926        }
4927        my $pool = SVN::Pool->new;
4928        my $t = $self->SUPER::check_path($path, $r, $pool);
4929        $pool->clear;
4930        if ($r != $cache->{r}) {
4931                %{$cache->{data}} = ();
4932                $cache->{r} = $r;
4933        }
4934        $cache->{data}->{$path} = $t;
4935}
4936
4937sub get_dir {
4938        my ($self, $dir, $r) = @_;
4939        my $cache = $self->{cache}->{get_dir};
4940        if ($r == $cache->{r}) {
4941                if (my $x = $cache->{data}->{$dir}) {
4942                        return wantarray ? @$x : $x->[0];
4943                }
4944        }
4945        my $pool = SVN::Pool->new;
4946        my ($d, undef, $props) = $self->SUPER::get_dir($dir, $r, $pool);
4947        my %dirents = map { $_ => { kind => $d->{$_}->kind } } keys %$d;
4948        $pool->clear;
4949        if ($r != $cache->{r}) {
4950                %{$cache->{data}} = ();
4951                $cache->{r} = $r;
4952        }
4953        $cache->{data}->{$dir} = [ \%dirents, $r, $props ];
4954        wantarray ? (\%dirents, $r, $props) : \%dirents;
4955}
4956
4957sub DESTROY {
4958        # do not call the real DESTROY since we store ourselves in $RA
4959}
4960
4961# get_log(paths, start, end, limit,
4962#         discover_changed_paths, strict_node_history, receiver)
4963sub get_log {
4964        my ($self, @args) = @_;
4965        my $pool = SVN::Pool->new;
4966
4967        # svn_log_changed_path_t objects passed to get_log are likely to be
4968        # overwritten even if only the refs are copied to an external variable,
4969        # so we should dup the structures in their entirety.  Using an
4970        # externally passed pool (instead of our temporary and quickly cleared
4971        # pool in Git::SVN::Ra) does not help matters at all...
4972        my $receiver = pop @args;
4973        my $prefix = "/".$self->{svn_path};
4974        $prefix =~ s#/+($)##;
4975        my $prefix_regex = qr#^\Q$prefix\E#;
4976        push(@args, sub {
4977                my ($paths) = $_[0];
4978                return &$receiver(@_) unless $paths;
4979                $_[0] = ();
4980                foreach my $p (keys %$paths) {
4981                        my $i = $paths->{$p};
4982                        # Make path relative to our url, not repos_root
4983                        $p =~ s/$prefix_regex//;
4984                        my %s = map { $_ => $i->$_; }
4985                                qw/copyfrom_path copyfrom_rev action/;
4986                        if ($s{'copyfrom_path'}) {
4987                                $s{'copyfrom_path'} =~ s/$prefix_regex//;
4988                        }
4989                        $_[0]{$p} = \%s;
4990                }
4991                &$receiver(@_);
4992        });
4993
4994
4995        # the limit parameter was not supported in SVN 1.1.x, so we
4996        # drop it.  Therefore, the receiver callback passed to it
4997        # is made aware of this limitation by being wrapped if
4998        # the limit passed to is being wrapped.
4999        if (::compare_svn_version('1.2.0') <= 0) {
5000                my $limit = splice(@args, 3, 1);
5001                if ($limit > 0) {
5002                        my $receiver = pop @args;
5003                        push(@args, sub { &$receiver(@_) if (--$limit >= 0) });
5004                }
5005        }
5006        my $ret = $self->SUPER::get_log(@args, $pool);
5007        $pool->clear;
5008        $ret;
5009}
5010
5011sub trees_match {
5012        my ($self, $url1, $rev1, $url2, $rev2) = @_;
5013        my $ctx = SVN::Client->new(auth => _auth_providers);
5014        my $out = IO::File->new_tmpfile;
5015
5016        # older SVN (1.1.x) doesn't take $pool as the last parameter for
5017        # $ctx->diff(), so we'll create a default one
5018        my $pool = SVN::Pool->new_default_sub;
5019
5020        $ra_invalid = 1; # this will open a new SVN::Ra connection to $url1
5021        $ctx->diff([], $url1, $rev1, $url2, $rev2, 1, 1, 0, $out, $out);
5022        $out->flush;
5023        my $ret = (($out->stat)[7] == 0);
5024        close $out or croak $!;
5025
5026        $ret;
5027}
5028
5029sub get_commit_editor {
5030        my ($self, $log, $cb, $pool) = @_;
5031
5032        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef, 0) : ();
5033        $self->SUPER::get_commit_editor($log, $cb, @lock, $pool);
5034}
5035
5036sub gs_do_update {
5037        my ($self, $rev_a, $rev_b, $gs, $editor) = @_;
5038        my $new = ($rev_a == $rev_b);
5039        my $path = $gs->{path};
5040
5041        if ($new && -e $gs->{index}) {
5042                unlink $gs->{index} or die
5043                  "Couldn't unlink index: $gs->{index}: $!\n";
5044        }
5045        my $pool = SVN::Pool->new;
5046        $editor->set_path_strip($path);
5047        my (@pc) = split m#/#, $path;
5048        my $reporter = $self->do_update($rev_b, (@pc ? shift @pc : ''),
5049                                        1, $editor, $pool);
5050        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
5051
5052        # Since we can't rely on svn_ra_reparent being available, we'll
5053        # just have to do some magic with set_path to make it so
5054        # we only want a partial path.
5055        my $sp = '';
5056        my $final = join('/', @pc);
5057        while (@pc) {
5058                $reporter->set_path($sp, $rev_b, 0, @lock, $pool);
5059                $sp .= '/' if length $sp;
5060                $sp .= shift @pc;
5061        }
5062        die "BUG: '$sp' != '$final'\n" if ($sp ne $final);
5063
5064        $reporter->set_path($sp, $rev_a, $new, @lock, $pool);
5065
5066        $reporter->finish_report($pool);
5067        $pool->clear;
5068        $editor->{git_commit_ok};
5069}
5070
5071# this requires SVN 1.4.3 or later (do_switch didn't work before 1.4.3, and
5072# svn_ra_reparent didn't work before 1.4)
5073sub gs_do_switch {
5074        my ($self, $rev_a, $rev_b, $gs, $url_b, $editor) = @_;
5075        my $path = $gs->{path};
5076        my $pool = SVN::Pool->new;
5077
5078        my $full_url = $self->{url};
5079        my $old_url = $full_url;
5080        $full_url .= '/' . $path if length $path;
5081        my ($ra, $reparented);
5082
5083        if ($old_url =~ m#^svn(\+ssh)?://# ||
5084            ($full_url =~ m#^https?://# &&
5085             escape_url($full_url) ne $full_url)) {
5086                $_[0] = undef;
5087                $self = undef;
5088                $RA = undef;
5089                $ra = Git::SVN::Ra->new($full_url);
5090                $ra_invalid = 1;
5091        } elsif ($old_url ne $full_url) {
5092                SVN::_Ra::svn_ra_reparent($self->{session}, $full_url, $pool);
5093                $self->{url} = $full_url;
5094                $reparented = 1;
5095        }
5096
5097        $ra ||= $self;
5098        $url_b = escape_url($url_b);
5099        my $reporter = $ra->do_switch($rev_b, '', 1, $url_b, $editor, $pool);
5100        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
5101        $reporter->set_path('', $rev_a, 0, @lock, $pool);
5102        $reporter->finish_report($pool);
5103
5104        if ($reparented) {
5105                SVN::_Ra::svn_ra_reparent($self->{session}, $old_url, $pool);
5106                $self->{url} = $old_url;
5107        }
5108
5109        $pool->clear;
5110        $editor->{git_commit_ok};
5111}
5112
5113sub longest_common_path {
5114        my ($gsv, $globs) = @_;
5115        my %common;
5116        my $common_max = scalar @$gsv;
5117
5118        foreach my $gs (@$gsv) {
5119                my @tmp = split m#/#, $gs->{path};
5120                my $p = '';
5121                foreach (@tmp) {
5122                        $p .= length($p) ? "/$_" : $_;
5123                        $common{$p} ||= 0;
5124                        $common{$p}++;
5125                }
5126        }
5127        $globs ||= [];
5128        $common_max += scalar @$globs;
5129        foreach my $glob (@$globs) {
5130                my @tmp = split m#/#, $glob->{path}->{left};
5131                my $p = '';
5132                foreach (@tmp) {
5133                        $p .= length($p) ? "/$_" : $_;
5134                        $common{$p} ||= 0;
5135                        $common{$p}++;
5136                }
5137        }
5138
5139        my $longest_path = '';
5140        foreach (sort {length $b <=> length $a} keys %common) {
5141                if ($common{$_} == $common_max) {
5142                        $longest_path = $_;
5143                        last;
5144                }
5145        }
5146        $longest_path;
5147}
5148
5149sub gs_fetch_loop_common {
5150        my ($self, $base, $head, $gsv, $globs) = @_;
5151        return if ($base > $head);
5152        my $inc = $_log_window_size;
5153        my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
5154        my $longest_path = longest_common_path($gsv, $globs);
5155        my $ra_url = $self->{url};
5156        my $find_trailing_edge;
5157        while (1) {
5158                my %revs;
5159                my $err;
5160                my $err_handler = $SVN::Error::handler;
5161                $SVN::Error::handler = sub {
5162                        ($err) = @_;
5163                        skip_unknown_revs($err);
5164                };
5165                sub _cb {
5166                        my ($paths, $r, $author, $date, $log) = @_;
5167                        [ $paths,
5168                          { author => $author, date => $date, log => $log } ];
5169                }
5170                $self->get_log([$longest_path], $min, $max, 0, 1, 1,
5171                               sub { $revs{$_[1]} = _cb(@_) });
5172                if ($err) {
5173                        print "Checked through r$max\r";
5174                } else {
5175                        $find_trailing_edge = 1;
5176                }
5177                if ($err and $find_trailing_edge) {
5178                        print STDERR "Path '$longest_path' ",
5179                                     "was probably deleted:\n",
5180                                     $err->expanded_message,
5181                                     "\nWill attempt to follow ",
5182                                     "revisions r$min .. r$max ",
5183                                     "committed before the deletion\n";
5184                        my $hi = $max;
5185                        while (--$hi >= $min) {
5186                                my $ok;
5187                                $self->get_log([$longest_path], $min, $hi,
5188                                               0, 1, 1, sub {
5189                                               $ok = $_[1];
5190                                               $revs{$_[1]} = _cb(@_) });
5191                                if ($ok) {
5192                                        print STDERR "r$min .. r$ok OK\n";
5193                                        last;
5194                                }
5195                        }
5196                        $find_trailing_edge = 0;
5197                }
5198                $SVN::Error::handler = $err_handler;
5199
5200                my %exists = map { $_->{path} => $_ } @$gsv;
5201                foreach my $r (sort {$a <=> $b} keys %revs) {
5202                        my ($paths, $logged) = @{$revs{$r}};
5203
5204                        foreach my $gs ($self->match_globs(\%exists, $paths,
5205                                                           $globs, $r)) {
5206                                if ($gs->rev_map_max >= $r) {
5207                                        next;
5208                                }
5209                                next unless $gs->match_paths($paths, $r);
5210                                $gs->{logged_rev_props} = $logged;
5211                                if (my $last_commit = $gs->last_commit) {
5212                                        $gs->assert_index_clean($last_commit);
5213                                }
5214                                my $log_entry = $gs->do_fetch($paths, $r);
5215                                if ($log_entry) {
5216                                        $gs->do_git_commit($log_entry);
5217                                }
5218                                $INDEX_FILES{$gs->{index}} = 1;
5219                        }
5220                        foreach my $g (@$globs) {
5221                                my $k = "svn-remote.$g->{remote}." .
5222                                        "$g->{t}-maxRev";
5223                                Git::SVN::tmp_config($k, $r);
5224                        }
5225                        if ($ra_invalid) {
5226                                $_[0] = undef;
5227                                $self = undef;
5228                                $RA = undef;
5229                                $self = Git::SVN::Ra->new($ra_url);
5230                                $ra_invalid = undef;
5231                        }
5232                }
5233                # pre-fill the .rev_db since it'll eventually get filled in
5234                # with '0' x40 if something new gets committed
5235                foreach my $gs (@$gsv) {
5236                        next if $gs->rev_map_max >= $max;
5237                        next if defined $gs->rev_map_get($max);
5238                        $gs->rev_map_set($max, 0 x40);
5239                }
5240                foreach my $g (@$globs) {
5241                        my $k = "svn-remote.$g->{remote}.$g->{t}-maxRev";
5242                        Git::SVN::tmp_config($k, $max);
5243                }
5244                last if $max >= $head;
5245                $min = $max + 1;
5246                $max += $inc;
5247                $max = $head if ($max > $head);
5248        }
5249        Git::SVN::gc();
5250}
5251
5252sub get_dir_globbed {
5253        my ($self, $left, $depth, $r) = @_;
5254
5255        my @x = eval { $self->get_dir($left, $r) };
5256        return unless scalar @x == 3;
5257        my $dirents = $x[0];
5258        my @finalents;
5259        foreach my $de (keys %$dirents) {
5260                next if $dirents->{$de}->{kind} != $SVN::Node::dir;
5261                if ($depth > 1) {
5262                        my @args = ("$left/$de", $depth - 1, $r);
5263                        foreach my $dir ($self->get_dir_globbed(@args)) {
5264                                push @finalents, "$de/$dir";
5265                        }
5266                } else {
5267                        push @finalents, $de;
5268                }
5269        }
5270        @finalents;
5271}
5272
5273# return value: 0 -- don't ignore, 1 -- ignore
5274sub is_ref_ignored {
5275        my ($g, $p) = @_;
5276        my $refname = $g->{ref}->full_path($p);
5277        return 1 if defined($g->{ignore_refs_regex}) &&
5278                    $refname =~ m!$g->{ignore_refs_regex}!;
5279        return 0 unless defined($_ignore_refs_regex);
5280        return 1 if $refname =~ m!$_ignore_refs_regex!o;
5281        return 0;
5282}
5283
5284sub match_globs {
5285        my ($self, $exists, $paths, $globs, $r) = @_;
5286
5287        sub get_dir_check {
5288                my ($self, $exists, $g, $r) = @_;
5289
5290                my @dirs = $self->get_dir_globbed($g->{path}->{left},
5291                                                  $g->{path}->{depth},
5292                                                  $r);
5293
5294                foreach my $de (@dirs) {
5295                        my $p = $g->{path}->full_path($de);
5296                        next if $exists->{$p};
5297                        next if (length $g->{path}->{right} &&
5298                                 ($self->check_path($p, $r) !=
5299                                  $SVN::Node::dir));
5300                        next unless $p =~ /$g->{path}->{regex}/;
5301                        $exists->{$p} = Git::SVN->init($self->{url}, $p, undef,
5302                                         $g->{ref}->full_path($de), 1);
5303                }
5304        }
5305        foreach my $g (@$globs) {
5306                if (my $path = $paths->{"/$g->{path}->{left}"}) {
5307                        if ($path->{action} =~ /^[AR]$/) {
5308                                get_dir_check($self, $exists, $g, $r);
5309                        }
5310                }
5311                foreach (keys %$paths) {
5312                        if (/$g->{path}->{left_regex}/ &&
5313                            !/$g->{path}->{regex}/) {
5314                                next if $paths->{$_}->{action} !~ /^[AR]$/;
5315                                get_dir_check($self, $exists, $g, $r);
5316                        }
5317                        next unless /$g->{path}->{regex}/;
5318                        my $p = $1;
5319                        my $pathname = $g->{path}->full_path($p);
5320                        next if is_ref_ignored($g, $p);
5321                        next if $exists->{$pathname};
5322                        next if ($self->check_path($pathname, $r) !=
5323                                 $SVN::Node::dir);
5324                        $exists->{$pathname} = Git::SVN->init(
5325                                              $self->{url}, $pathname, undef,
5326                                              $g->{ref}->full_path($p), 1);
5327                }
5328                my $c = '';
5329                foreach (split m#/#, $g->{path}->{left}) {
5330                        $c .= "/$_";
5331                        next unless ($paths->{$c} &&
5332                                     ($paths->{$c}->{action} =~ /^[AR]$/));
5333                        get_dir_check($self, $exists, $g, $r);
5334                }
5335        }
5336        values %$exists;
5337}
5338
5339sub minimize_url {
5340        my ($self) = @_;
5341        return $self->{url} if ($self->{url} eq $self->{repos_root});
5342        my $url = $self->{repos_root};
5343        my @components = split(m!/!, $self->{svn_path});
5344        my $c = '';
5345        do {
5346                $url .= "/$c" if length $c;
5347                eval {
5348                        my $ra = (ref $self)->new($url);
5349                        my $latest = $ra->get_latest_revnum;
5350                        $ra->get_log("", $latest, 0, 1, 0, 1, sub {});
5351                };
5352        } while ($@ && ($c = shift @components));
5353        $url;
5354}
5355
5356sub can_do_switch {
5357        my $self = shift;
5358        unless (defined $can_do_switch) {
5359                my $pool = SVN::Pool->new;
5360                my $rep = eval {
5361                        $self->do_switch(1, '', 0, $self->{url},
5362                                         SVN::Delta::Editor->new, $pool);
5363                };
5364                if ($@) {
5365                        $can_do_switch = 0;
5366                } else {
5367                        $rep->abort_report($pool);
5368                        $can_do_switch = 1;
5369                }
5370                $pool->clear;
5371        }
5372        $can_do_switch;
5373}
5374
5375sub skip_unknown_revs {
5376        my ($err) = @_;
5377        my $errno = $err->apr_err();
5378        # Maybe the branch we're tracking didn't
5379        # exist when the repo started, so it's
5380        # not an error if it doesn't, just continue
5381        #
5382        # Wonderfully consistent library, eh?
5383        # 160013 - svn:// and file://
5384        # 175002 - http(s)://
5385        # 175007 - http(s):// (this repo required authorization, too...)
5386        #   More codes may be discovered later...
5387        if ($errno == 175007 || $errno == 175002 || $errno == 160013) {
5388                my $err_key = $err->expanded_message;
5389                # revision numbers change every time, filter them out
5390                $err_key =~ s/\d+/\0/g;
5391                $err_key = "$errno\0$err_key";
5392                unless ($ignored_err{$err_key}) {
5393                        warn "W: Ignoring error from SVN, path probably ",
5394                             "does not exist: ($errno): ",
5395                             $err->expanded_message,"\n";
5396                        warn "W: Do not be alarmed at the above message ",
5397                             "git-svn is just searching aggressively for ",
5398                             "old history.\n",
5399                             "This may take a while on large repositories\n";
5400                        $ignored_err{$err_key} = 1;
5401                }
5402                return;
5403        }
5404        die "Error from SVN, ($errno): ", $err->expanded_message,"\n";
5405}
5406
5407package Git::SVN::Log;
5408use strict;
5409use warnings;
5410use POSIX qw/strftime/;
5411use constant commit_log_separator => ('-' x 72) . "\n";
5412use vars qw/$TZ $limit $color $pager $non_recursive $verbose $oneline
5413            %rusers $show_commit $incremental/;
5414my $l_fmt;
5415
5416sub cmt_showable {
5417        my ($c) = @_;
5418        return 1 if defined $c->{r};
5419
5420        # big commit message got truncated by the 16k pretty buffer in rev-list
5421        if ($c->{l} && $c->{l}->[-1] eq "...\n" &&
5422                                $c->{a_raw} =~ /\@([a-f\d\-]+)>$/) {
5423                @{$c->{l}} = ();
5424                my @log = command(qw/cat-file commit/, $c->{c});
5425
5426                # shift off the headers
5427                shift @log while ($log[0] ne '');
5428                shift @log;
5429
5430                # TODO: make $c->{l} not have a trailing newline in the future
5431                @{$c->{l}} = map { "$_\n" } grep !/^git-svn-id: /, @log;
5432
5433                (undef, $c->{r}, undef) = ::extract_metadata(
5434                                (grep(/^git-svn-id: /, @log))[-1]);
5435        }
5436        return defined $c->{r};
5437}
5438
5439sub log_use_color {
5440        return $color || Git->repository->get_colorbool('color.diff');
5441}
5442
5443sub git_svn_log_cmd {
5444        my ($r_min, $r_max, @args) = @_;
5445        my $head = 'HEAD';
5446        my (@files, @log_opts);
5447        foreach my $x (@args) {
5448                if ($x eq '--' || @files) {
5449                        push @files, $x;
5450                } else {
5451                        if (::verify_ref("$x^0")) {
5452                                $head = $x;
5453                        } else {
5454                                push @log_opts, $x;
5455                        }
5456                }
5457        }
5458
5459        my ($url, $rev, $uuid, $gs) = ::working_head_info($head);
5460        $gs ||= Git::SVN->_new;
5461        my @cmd = (qw/log --abbrev-commit --pretty=raw --default/,
5462                   $gs->refname);
5463        push @cmd, '-r' unless $non_recursive;
5464        push @cmd, qw/--raw --name-status/ if $verbose;
5465        push @cmd, '--color' if log_use_color();
5466        push @cmd, @log_opts;
5467        if (defined $r_max && $r_max == $r_min) {
5468                push @cmd, '--max-count=1';
5469                if (my $c = $gs->rev_map_get($r_max)) {
5470                        push @cmd, $c;
5471                }
5472        } elsif (defined $r_max) {
5473                if ($r_max < $r_min) {
5474                        ($r_min, $r_max) = ($r_max, $r_min);
5475                }
5476                my (undef, $c_max) = $gs->find_rev_before($r_max, 1, $r_min);
5477                my (undef, $c_min) = $gs->find_rev_after($r_min, 1, $r_max);
5478                # If there are no commits in the range, both $c_max and $c_min
5479                # will be undefined.  If there is at least 1 commit in the
5480                # range, both will be defined.
5481                return () if !defined $c_min || !defined $c_max;
5482                if ($c_min eq $c_max) {
5483                        push @cmd, '--max-count=1', $c_min;
5484                } else {
5485                        push @cmd, '--boundary', "$c_min..$c_max";
5486                }
5487        }
5488        return (@cmd, @files);
5489}
5490
5491# adapted from pager.c
5492sub config_pager {
5493        if (! -t *STDOUT) {
5494                $ENV{GIT_PAGER_IN_USE} = 'false';
5495                $pager = undef;
5496                return;
5497        }
5498        chomp($pager = command_oneline(qw(var GIT_PAGER)));
5499        if ($pager eq 'cat') {
5500                $pager = undef;
5501        }
5502        $ENV{GIT_PAGER_IN_USE} = defined($pager);
5503}
5504
5505sub run_pager {
5506        return unless defined $pager;
5507        pipe my ($rfd, $wfd) or return;
5508        defined(my $pid = fork) or ::fatal "Can't fork: $!";
5509        if (!$pid) {
5510                open STDOUT, '>&', $wfd or
5511                                     ::fatal "Can't redirect to stdout: $!";
5512                return;
5513        }
5514        open STDIN, '<&', $rfd or ::fatal "Can't redirect stdin: $!";
5515        $ENV{LESS} ||= 'FRSX';
5516        exec $pager or ::fatal "Can't run pager: $! ($pager)";
5517}
5518
5519sub format_svn_date {
5520        my $t = shift || time;
5521        my $gmoff = Git::SVN::get_tz($t);
5522        return strftime("%Y-%m-%d %H:%M:%S $gmoff (%a, %d %b %Y)", localtime($t));
5523}
5524
5525sub parse_git_date {
5526        my ($t, $tz) = @_;
5527        # Date::Parse isn't in the standard Perl distro :(
5528        if ($tz =~ s/^\+//) {
5529                $t += tz_to_s_offset($tz);
5530        } elsif ($tz =~ s/^\-//) {
5531                $t -= tz_to_s_offset($tz);
5532        }
5533        return $t;
5534}
5535
5536sub set_local_timezone {
5537        if (defined $TZ) {
5538                $ENV{TZ} = $TZ;
5539        } else {
5540                delete $ENV{TZ};
5541        }
5542}
5543
5544sub tz_to_s_offset {
5545        my ($tz) = @_;
5546        $tz =~ s/(\d\d)$//;
5547        return ($1 * 60) + ($tz * 3600);
5548}
5549
5550sub get_author_info {
5551        my ($dest, $author, $t, $tz) = @_;
5552        $author =~ s/(?:^\s*|\s*$)//g;
5553        $dest->{a_raw} = $author;
5554        my $au;
5555        if ($::_authors) {
5556                $au = $rusers{$author} || undef;
5557        }
5558        if (!$au) {
5559                ($au) = ($author =~ /<([^>]+)\@[^>]+>$/);
5560        }
5561        $dest->{t} = $t;
5562        $dest->{tz} = $tz;
5563        $dest->{a} = $au;
5564        $dest->{t_utc} = parse_git_date($t, $tz);
5565}
5566
5567sub process_commit {
5568        my ($c, $r_min, $r_max, $defer) = @_;
5569        if (defined $r_min && defined $r_max) {
5570                if ($r_min == $c->{r} && $r_min == $r_max) {
5571                        show_commit($c);
5572                        return 0;
5573                }
5574                return 1 if $r_min == $r_max;
5575                if ($r_min < $r_max) {
5576                        # we need to reverse the print order
5577                        return 0 if (defined $limit && --$limit < 0);
5578                        push @$defer, $c;
5579                        return 1;
5580                }
5581                if ($r_min != $r_max) {
5582                        return 1 if ($r_min < $c->{r});
5583                        return 1 if ($r_max > $c->{r});
5584                }
5585        }
5586        return 0 if (defined $limit && --$limit < 0);
5587        show_commit($c);
5588        return 1;
5589}
5590
5591sub show_commit {
5592        my $c = shift;
5593        if ($oneline) {
5594                my $x = "\n";
5595                if (my $l = $c->{l}) {
5596                        while ($l->[0] =~ /^\s*$/) { shift @$l }
5597                        $x = $l->[0];
5598                }
5599                $l_fmt ||= 'A' . length($c->{r});
5600                print 'r',pack($l_fmt, $c->{r}),' | ';
5601                print "$c->{c} | " if $show_commit;
5602                print $x;
5603        } else {
5604                show_commit_normal($c);
5605        }
5606}
5607
5608sub show_commit_changed_paths {
5609        my ($c) = @_;
5610        return unless $c->{changed};
5611        print "Changed paths:\n", @{$c->{changed}};
5612}
5613
5614sub show_commit_normal {
5615        my ($c) = @_;
5616        print commit_log_separator, "r$c->{r} | ";
5617        print "$c->{c} | " if $show_commit;
5618        print "$c->{a} | ", format_svn_date($c->{t_utc}), ' | ';
5619        my $nr_line = 0;
5620
5621        if (my $l = $c->{l}) {
5622                while ($l->[$#$l] eq "\n" && $#$l > 0
5623                                          && $l->[($#$l - 1)] eq "\n") {
5624                        pop @$l;
5625                }
5626                $nr_line = scalar @$l;
5627                if (!$nr_line) {
5628                        print "1 line\n\n\n";
5629                } else {
5630                        if ($nr_line == 1) {
5631                                $nr_line = '1 line';
5632                        } else {
5633                                $nr_line .= ' lines';
5634                        }
5635                        print $nr_line, "\n";
5636                        show_commit_changed_paths($c);
5637                        print "\n";
5638                        print $_ foreach @$l;
5639                }
5640        } else {
5641                print "1 line\n";
5642                show_commit_changed_paths($c);
5643                print "\n";
5644
5645        }
5646        foreach my $x (qw/raw stat diff/) {
5647                if ($c->{$x}) {
5648                        print "\n";
5649                        print $_ foreach @{$c->{$x}}
5650                }
5651        }
5652}
5653
5654sub cmd_show_log {
5655        my (@args) = @_;
5656        my ($r_min, $r_max);
5657        my $r_last = -1; # prevent dupes
5658        set_local_timezone();
5659        if (defined $::_revision) {
5660                if ($::_revision =~ /^(\d+):(\d+)$/) {
5661                        ($r_min, $r_max) = ($1, $2);
5662                } elsif ($::_revision =~ /^\d+$/) {
5663                        $r_min = $r_max = $::_revision;
5664                } else {
5665                        ::fatal "-r$::_revision is not supported, use ",
5666                                "standard 'git log' arguments instead";
5667                }
5668        }
5669
5670        config_pager();
5671        @args = git_svn_log_cmd($r_min, $r_max, @args);
5672        if (!@args) {
5673                print commit_log_separator unless $incremental || $oneline;
5674                return;
5675        }
5676        my $log = command_output_pipe(@args);
5677        run_pager();
5678        my (@k, $c, $d, $stat);
5679        my $esc_color = qr/(?:\033\[(?:(?:\d+;)*\d*)?m)*/;
5680        while (<$log>) {
5681                if (/^${esc_color}commit (?:- )?($::sha1_short)/o) {
5682                        my $cmt = $1;
5683                        if ($c && cmt_showable($c) && $c->{r} != $r_last) {
5684                                $r_last = $c->{r};
5685                                process_commit($c, $r_min, $r_max, \@k) or
5686                                                                goto out;
5687                        }
5688                        $d = undef;
5689                        $c = { c => $cmt };
5690                } elsif (/^${esc_color}author (.+) (\d+) ([\-\+]?\d+)$/o) {
5691                        get_author_info($c, $1, $2, $3);
5692                } elsif (/^${esc_color}(?:tree|parent|committer) /o) {
5693                        # ignore
5694                } elsif (/^${esc_color}:\d{6} \d{6} $::sha1_short/o) {
5695                        push @{$c->{raw}}, $_;
5696                } elsif (/^${esc_color}[ACRMDT]\t/) {
5697                        # we could add $SVN->{svn_path} here, but that requires
5698                        # remote access at the moment (repo_path_split)...
5699                        s#^(${esc_color})([ACRMDT])\t#$1   $2 #o;
5700                        push @{$c->{changed}}, $_;
5701                } elsif (/^${esc_color}diff /o) {
5702                        $d = 1;
5703                        push @{$c->{diff}}, $_;
5704                } elsif ($d) {
5705                        push @{$c->{diff}}, $_;
5706                } elsif (/^\ .+\ \|\s*\d+\ $esc_color[\+\-]*
5707                          $esc_color*[\+\-]*$esc_color$/x) {
5708                        $stat = 1;
5709                        push @{$c->{stat}}, $_;
5710                } elsif ($stat && /^ \d+ files changed, \d+ insertions/) {
5711                        push @{$c->{stat}}, $_;
5712                        $stat = undef;
5713                } elsif (/^${esc_color}    (git-svn-id:.+)$/o) {
5714                        ($c->{url}, $c->{r}, undef) = ::extract_metadata($1);
5715                } elsif (s/^${esc_color}    //o) {
5716                        push @{$c->{l}}, $_;
5717                }
5718        }
5719        if ($c && defined $c->{r} && $c->{r} != $r_last) {
5720                $r_last = $c->{r};
5721                process_commit($c, $r_min, $r_max, \@k);
5722        }
5723        if (@k) {
5724                ($r_min, $r_max) = ($r_max, $r_min);
5725                process_commit($_, $r_min, $r_max) foreach reverse @k;
5726        }
5727out:
5728        close $log;
5729        print commit_log_separator unless $incremental || $oneline;
5730}
5731
5732sub cmd_blame {
5733        my $path = pop;
5734
5735        config_pager();
5736        run_pager();
5737
5738        my ($fh, $ctx, $rev);
5739
5740        if ($_git_format) {
5741                ($fh, $ctx) = command_output_pipe('blame', @_, $path);
5742                while (my $line = <$fh>) {
5743                        if ($line =~ /^\^?([[:xdigit:]]+)\s/) {
5744                                # Uncommitted edits show up as a rev ID of
5745                                # all zeros, which we can't look up with
5746                                # cmt_metadata
5747                                if ($1 !~ /^0+$/) {
5748                                        (undef, $rev, undef) =
5749                                                ::cmt_metadata($1);
5750                                        $rev = '0' if (!$rev);
5751                                } else {
5752                                        $rev = '0';
5753                                }
5754                                $rev = sprintf('%-10s', $rev);
5755                                $line =~ s/^\^?[[:xdigit:]]+(\s)/$rev$1/;
5756                        }
5757                        print $line;
5758                }
5759        } else {
5760                ($fh, $ctx) = command_output_pipe('blame', '-p', @_, 'HEAD',
5761                                                  '--', $path);
5762                my ($sha1);
5763                my %authors;
5764                my @buffer;
5765                my %dsha; #distinct sha keys
5766
5767                while (my $line = <$fh>) {
5768                        push @buffer, $line;
5769                        if ($line =~ /^([[:xdigit:]]{40})\s\d+\s\d+/) {
5770                                $dsha{$1} = 1;
5771                        }
5772                }
5773
5774                my $s2r = ::cmt_sha2rev_batch([keys %dsha]);
5775
5776                foreach my $line (@buffer) {
5777                        if ($line =~ /^([[:xdigit:]]{40})\s\d+\s\d+/) {
5778                                $rev = $s2r->{$1};
5779                                $rev = '0' if (!$rev)
5780                        }
5781                        elsif ($line =~ /^author (.*)/) {
5782                                $authors{$rev} = $1;
5783                                $authors{$rev} =~ s/\s/_/g;
5784                        }
5785                        elsif ($line =~ /^\t(.*)$/) {
5786                                printf("%6s %10s %s\n", $rev, $authors{$rev}, $1);
5787                        }
5788                }
5789        }
5790        command_close_pipe($fh, $ctx);
5791}
5792
5793package Git::SVN::Migration;
5794# these version numbers do NOT correspond to actual version numbers
5795# of git nor git-svn.  They are just relative.
5796#
5797# v0 layout: .git/$id/info/url, refs/heads/$id-HEAD
5798#
5799# v1 layout: .git/$id/info/url, refs/remotes/$id
5800#
5801# v2 layout: .git/svn/$id/info/url, refs/remotes/$id
5802#
5803# v3 layout: .git/svn/$id, refs/remotes/$id
5804#            - info/url may remain for backwards compatibility
5805#            - this is what we migrate up to this layout automatically,
5806#            - this will be used by git svn init on single branches
5807# v3.1 layout (auto migrated):
5808#            - .rev_db => .rev_db.$UUID, .rev_db will remain as a symlink
5809#              for backwards compatibility
5810#
5811# v4 layout: .git/svn/$repo_id/$id, refs/remotes/$repo_id/$id
5812#            - this is only created for newly multi-init-ed
5813#              repositories.  Similar in spirit to the
5814#              --use-separate-remotes option in git-clone (now default)
5815#            - we do not automatically migrate to this (following
5816#              the example set by core git)
5817#
5818# v5 layout: .rev_db.$UUID => .rev_map.$UUID
5819#            - newer, more-efficient format that uses 24-bytes per record
5820#              with no filler space.
5821#            - use xxd -c24 < .rev_map.$UUID to view and debug
5822#            - This is a one-way migration, repositories updated to the
5823#              new format will not be able to use old git-svn without
5824#              rebuilding the .rev_db.  Rebuilding the rev_db is not
5825#              possible if noMetadata or useSvmProps are set; but should
5826#              be no problem for users that use the (sensible) defaults.
5827use strict;
5828use warnings;
5829use Carp qw/croak/;
5830use File::Path qw/mkpath/;
5831use File::Basename qw/dirname basename/;
5832use vars qw/$_minimize/;
5833
5834sub migrate_from_v0 {
5835        my $git_dir = $ENV{GIT_DIR};
5836        return undef unless -d $git_dir;
5837        my ($fh, $ctx) = command_output_pipe(qw/rev-parse --symbolic --all/);
5838        my $migrated = 0;
5839        while (<$fh>) {
5840                chomp;
5841                my ($id, $orig_ref) = ($_, $_);
5842                next unless $id =~ s#^refs/heads/(.+)-HEAD$#$1#;
5843                next unless -f "$git_dir/$id/info/url";
5844                my $new_ref = "refs/remotes/$id";
5845                if (::verify_ref("$new_ref^0")) {
5846                        print STDERR "W: $orig_ref is probably an old ",
5847                                     "branch used by an ancient version of ",
5848                                     "git-svn.\n",
5849                                     "However, $new_ref also exists.\n",
5850                                     "We will not be able ",
5851                                     "to use this branch until this ",
5852                                     "ambiguity is resolved.\n";
5853                        next;
5854                }
5855                print STDERR "Migrating from v0 layout...\n" if !$migrated;
5856                print STDERR "Renaming ref: $orig_ref => $new_ref\n";
5857                command_noisy('update-ref', $new_ref, $orig_ref);
5858                command_noisy('update-ref', '-d', $orig_ref, $orig_ref);
5859                $migrated++;
5860        }
5861        command_close_pipe($fh, $ctx);
5862        print STDERR "Done migrating from v0 layout...\n" if $migrated;
5863        $migrated;
5864}
5865
5866sub migrate_from_v1 {
5867        my $git_dir = $ENV{GIT_DIR};
5868        my $migrated = 0;
5869        return $migrated unless -d $git_dir;
5870        my $svn_dir = "$git_dir/svn";
5871
5872        # just in case somebody used 'svn' as their $id at some point...
5873        return $migrated if -d $svn_dir && ! -f "$svn_dir/info/url";
5874
5875        print STDERR "Migrating from a git-svn v1 layout...\n";
5876        mkpath([$svn_dir]);
5877        print STDERR "Data from a previous version of git-svn exists, but\n\t",
5878                     "$svn_dir\n\t(required for this version ",
5879                     "($::VERSION) of git-svn) does not exist.\n";
5880        my ($fh, $ctx) = command_output_pipe(qw/rev-parse --symbolic --all/);
5881        while (<$fh>) {
5882                my $x = $_;
5883                next unless $x =~ s#^refs/remotes/##;
5884                chomp $x;
5885                next unless -f "$git_dir/$x/info/url";
5886                my $u = eval { ::file_to_s("$git_dir/$x/info/url") };
5887                next unless $u;
5888                my $dn = dirname("$git_dir/svn/$x");
5889                mkpath([$dn]) unless -d $dn;
5890                if ($x eq 'svn') { # they used 'svn' as GIT_SVN_ID:
5891                        mkpath(["$git_dir/svn/svn"]);
5892                        print STDERR " - $git_dir/$x/info => ",
5893                                        "$git_dir/svn/$x/info\n";
5894                        rename "$git_dir/$x/info", "$git_dir/svn/$x/info" or
5895                               croak "$!: $x";
5896                        # don't worry too much about these, they probably
5897                        # don't exist with repos this old (save for index,
5898                        # and we can easily regenerate that)
5899                        foreach my $f (qw/unhandled.log index .rev_db/) {
5900                                rename "$git_dir/$x/$f", "$git_dir/svn/$x/$f";
5901                        }
5902                } else {
5903                        print STDERR " - $git_dir/$x => $git_dir/svn/$x\n";
5904                        rename "$git_dir/$x", "$git_dir/svn/$x" or
5905                               croak "$!: $x";
5906                }
5907                $migrated++;
5908        }
5909        command_close_pipe($fh, $ctx);
5910        print STDERR "Done migrating from a git-svn v1 layout\n";
5911        $migrated;
5912}
5913
5914sub read_old_urls {
5915        my ($l_map, $pfx, $path) = @_;
5916        my @dir;
5917        foreach (<$path/*>) {
5918                if (-r "$_/info/url") {
5919                        $pfx .= '/' if $pfx && $pfx !~ m!/$!;
5920                        my $ref_id = $pfx . basename $_;
5921                        my $url = ::file_to_s("$_/info/url");
5922                        $l_map->{$ref_id} = $url;
5923                } elsif (-d $_) {
5924                        push @dir, $_;
5925                }
5926        }
5927        foreach (@dir) {
5928                my $x = $_;
5929                $x =~ s!^\Q$ENV{GIT_DIR}\E/svn/!!o;
5930                read_old_urls($l_map, $x, $_);
5931        }
5932}
5933
5934sub migrate_from_v2 {
5935        my @cfg = command(qw/config -l/);
5936        return if grep /^svn-remote\..+\.url=/, @cfg;
5937        my %l_map;
5938        read_old_urls(\%l_map, '', "$ENV{GIT_DIR}/svn");
5939        my $migrated = 0;
5940
5941        foreach my $ref_id (sort keys %l_map) {
5942                eval { Git::SVN->init($l_map{$ref_id}, '', undef, $ref_id) };
5943                if ($@) {
5944                        Git::SVN->init($l_map{$ref_id}, '', $ref_id, $ref_id);
5945                }
5946                $migrated++;
5947        }
5948        $migrated;
5949}
5950
5951sub minimize_connections {
5952        my $r = Git::SVN::read_all_remotes();
5953        my $new_urls = {};
5954        my $root_repos = {};
5955        foreach my $repo_id (keys %$r) {
5956                my $url = $r->{$repo_id}->{url} or next;
5957                my $fetch = $r->{$repo_id}->{fetch} or next;
5958                my $ra = Git::SVN::Ra->new($url);
5959
5960                # skip existing cases where we already connect to the root
5961                if (($ra->{url} eq $ra->{repos_root}) ||
5962                    ($ra->{repos_root} eq $repo_id)) {
5963                        $root_repos->{$ra->{url}} = $repo_id;
5964                        next;
5965                }
5966
5967                my $root_ra = Git::SVN::Ra->new($ra->{repos_root});
5968                my $root_path = $ra->{url};
5969                $root_path =~ s#^\Q$ra->{repos_root}\E(/|$)##;
5970                foreach my $path (keys %$fetch) {
5971                        my $ref_id = $fetch->{$path};
5972                        my $gs = Git::SVN->new($ref_id, $repo_id, $path);
5973
5974                        # make sure we can read when connecting to
5975                        # a higher level of a repository
5976                        my ($last_rev, undef) = $gs->last_rev_commit;
5977                        if (!defined $last_rev) {
5978                                $last_rev = eval {
5979                                        $root_ra->get_latest_revnum;
5980                                };
5981                                next if $@;
5982                        }
5983                        my $new = $root_path;
5984                        $new .= length $path ? "/$path" : '';
5985                        eval {
5986                                $root_ra->get_log([$new], $last_rev, $last_rev,
5987                                                  0, 0, 1, sub { });
5988                        };
5989                        next if $@;
5990                        $new_urls->{$ra->{repos_root}}->{$new} =
5991                                { ref_id => $ref_id,
5992                                  old_repo_id => $repo_id,
5993                                  old_path => $path };
5994                }
5995        }
5996
5997        my @emptied;
5998        foreach my $url (keys %$new_urls) {
5999                # see if we can re-use an existing [svn-remote "repo_id"]
6000                # instead of creating a(n ugly) new section:
6001                my $repo_id = $root_repos->{$url} || $url;
6002
6003                my $fetch = $new_urls->{$url};
6004                foreach my $path (keys %$fetch) {
6005                        my $x = $fetch->{$path};
6006                        Git::SVN->init($url, $path, $repo_id, $x->{ref_id});
6007                        my $pfx = "svn-remote.$x->{old_repo_id}";
6008
6009                        my $old_fetch = quotemeta("$x->{old_path}:".
6010                                                  "$x->{ref_id}");
6011                        command_noisy(qw/config --unset/,
6012                                      "$pfx.fetch", '^'. $old_fetch . '$');
6013                        delete $r->{$x->{old_repo_id}}->
6014                               {fetch}->{$x->{old_path}};
6015                        if (!keys %{$r->{$x->{old_repo_id}}->{fetch}}) {
6016                                command_noisy(qw/config --unset/,
6017                                              "$pfx.url");
6018                                push @emptied, $x->{old_repo_id}
6019                        }
6020                }
6021        }
6022        if (@emptied) {
6023                my $file = $ENV{GIT_CONFIG} || "$ENV{GIT_DIR}/config";
6024                print STDERR <<EOF;
6025The following [svn-remote] sections in your config file ($file) are empty
6026and can be safely removed:
6027EOF
6028                print STDERR "[svn-remote \"$_\"]\n" foreach @emptied;
6029        }
6030}
6031
6032sub migration_check {
6033        migrate_from_v0();
6034        migrate_from_v1();
6035        migrate_from_v2();
6036        minimize_connections() if $_minimize;
6037}
6038
6039package Git::IndexInfo;
6040use strict;
6041use warnings;
6042use Git qw/command_input_pipe command_close_pipe/;
6043
6044sub new {
6045        my ($class) = @_;
6046        my ($gui, $ctx) = command_input_pipe(qw/update-index -z --index-info/);
6047        bless { gui => $gui, ctx => $ctx, nr => 0}, $class;
6048}
6049
6050sub remove {
6051        my ($self, $path) = @_;
6052        if (print { $self->{gui} } '0 ', 0 x 40, "\t", $path, "\0") {
6053                return ++$self->{nr};
6054        }
6055        undef;
6056}
6057
6058sub update {
6059        my ($self, $mode, $hash, $path) = @_;
6060        if (print { $self->{gui} } $mode, ' ', $hash, "\t", $path, "\0") {
6061                return ++$self->{nr};
6062        }
6063        undef;
6064}
6065
6066sub DESTROY {
6067        my ($self) = @_;
6068        command_close_pipe($self->{gui}, $self->{ctx});
6069}
6070
6071package Git::SVN::GlobSpec;
6072use strict;
6073use warnings;
6074
6075sub new {
6076        my ($class, $glob, $pattern_ok) = @_;
6077        my $re = $glob;
6078        $re =~ s!/+$!!g; # no need for trailing slashes
6079        my (@left, @right, @patterns);
6080        my $state = "left";
6081        my $die_msg = "Only one set of wildcard directories " .
6082                                "(e.g. '*' or '*/*/*') is supported: '$glob'\n";
6083        for my $part (split(m|/|, $glob)) {
6084                if ($part =~ /\*/ && $part ne "*") {
6085                        die "Invalid pattern in '$glob': $part\n";
6086                } elsif ($pattern_ok && $part =~ /[{}]/ &&
6087                         $part !~ /^\{[^{}]+\}/) {
6088                        die "Invalid pattern in '$glob': $part\n";
6089                }
6090                if ($part eq "*") {
6091                        die $die_msg if $state eq "right";
6092                        $state = "pattern";
6093                        push(@patterns, "[^/]*");
6094                } elsif ($pattern_ok && $part =~ /^\{(.*)\}$/) {
6095                        die $die_msg if $state eq "right";
6096                        $state = "pattern";
6097                        my $p = quotemeta($1);
6098                        $p =~ s/\\,/|/g;
6099                        push(@patterns, "(?:$p)");
6100                } else {
6101                        if ($state eq "left") {
6102                                push(@left, $part);
6103                        } else {
6104                                push(@right, $part);
6105                                $state = "right";
6106                        }
6107                }
6108        }
6109        my $depth = @patterns;
6110        if ($depth == 0) {
6111                die "One '*' is needed in glob: '$glob'\n";
6112        }
6113        my $left = join('/', @left);
6114        my $right = join('/', @right);
6115        $re = join('/', @patterns);
6116        $re = join('\/',
6117                   grep(length, quotemeta($left), "($re)", quotemeta($right)));
6118        my $left_re = qr/^\/\Q$left\E(\/|$)/;
6119        bless { left => $left, right => $right, left_regex => $left_re,
6120                regex => qr/$re/, glob => $glob, depth => $depth }, $class;
6121}
6122
6123sub full_path {
6124        my ($self, $path) = @_;
6125        return (length $self->{left} ? "$self->{left}/" : '') .
6126               $path . (length $self->{right} ? "/$self->{right}" : '');
6127}
6128
6129__END__
6130
6131Data structures:
6132
6133
6134$remotes = { # returned by read_all_remotes()
6135        'svn' => {
6136                # svn-remote.svn.url=https://svn.musicpd.org
6137                url => 'https://svn.musicpd.org',
6138                # svn-remote.svn.fetch=mpd/trunk:trunk
6139                fetch => {
6140                        'mpd/trunk' => 'trunk',
6141                },
6142                # svn-remote.svn.tags=mpd/tags/*:tags/*
6143                tags => {
6144                        path => {
6145                                left => 'mpd/tags',
6146                                right => '',
6147                                regex => qr!mpd/tags/([^/]+)$!,
6148                                glob => 'tags/*',
6149                        },
6150                        ref => {
6151                                left => 'tags',
6152                                right => '',
6153                                regex => qr!tags/([^/]+)$!,
6154                                glob => 'tags/*',
6155                        },
6156                }
6157        }
6158};
6159
6160$log_entry hashref as returned by libsvn_log_entry()
6161{
6162        log => 'whitespace-formatted log entry
6163',                                              # trailing newline is preserved
6164        revision => '8',                        # integer
6165        date => '2004-02-24T17:01:44.108345Z',  # commit date
6166        author => 'committer name'
6167};
6168
6169
6170# this is generated by generate_diff();
6171@mods = array of diff-index line hashes, each element represents one line
6172        of diff-index output
6173
6174diff-index line ($m hash)
6175{
6176        mode_a => first column of diff-index output, no leading ':',
6177        mode_b => second column of diff-index output,
6178        sha1_b => sha1sum of the final blob,
6179        chg => change type [MCRADT],
6180        file_a => original file name of a file (iff chg is 'C' or 'R')
6181        file_b => new/current file name of a file (any chg)
6182}
6183;
6184
6185# retval of read_url_paths{,_all}();
6186$l_map = {
6187        # repository root url
6188        'https://svn.musicpd.org' => {
6189                # repository path               # GIT_SVN_ID
6190                'mpd/trunk'             =>      'trunk',
6191                'mpd/tags/0.11.5'       =>      'tags/0.11.5',
6192        },
6193}
6194
6195Notes:
6196        I don't trust the each() function on unless I created %hash myself
6197        because the internal iterator may not have started at base.