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
  13use Carp qw/croak/;
  14use Digest::MD5;
  15use IO::File qw//;
  16use File::Basename qw/dirname basename/;
  17use File::Path qw/mkpath/;
  18use File::Spec;
  19use File::Find;
  20use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
  21use IPC::Open3;
  22use Memoize;
  23
  24use Git::SVN;
  25use Git::SVN::Editor;
  26use Git::SVN::Fetcher;
  27use Git::SVN::Ra;
  28use Git::SVN::Prompt;
  29use Git::SVN::Log;
  30use Git::SVN::Migration;
  31
  32use Git::SVN::Utils qw(fatal can_compress);
  33use Git qw(
  34        git_cmd_try
  35        command
  36        command_oneline
  37        command_noisy
  38        command_output_pipe
  39        command_close_pipe
  40        command_bidi_pipe
  41        command_close_bidi_pipe
  42);
  43
  44BEGIN {
  45        Memoize::memoize 'Git::config';
  46        Memoize::memoize 'Git::config_bool';
  47}
  48
  49
  50# From which subdir have we been invoked?
  51my $cmd_dir_prefix = eval {
  52        command_oneline([qw/rev-parse --show-prefix/], STDERR => 0)
  53} || '';
  54
  55my $git_dir_user_set = 1 if defined $ENV{GIT_DIR};
  56$ENV{GIT_DIR} ||= '.git';
  57$Git::SVN::Ra::_log_window_size = 100;
  58
  59if (! exists $ENV{SVN_SSH} && exists $ENV{GIT_SSH}) {
  60        $ENV{SVN_SSH} = $ENV{GIT_SSH};
  61}
  62
  63if (exists $ENV{SVN_SSH} && $^O eq 'msys') {
  64        $ENV{SVN_SSH} =~ s/\\/\\\\/g;
  65        $ENV{SVN_SSH} =~ s/(.*)/"$1"/;
  66}
  67
  68$Git::SVN::Log::TZ = $ENV{TZ};
  69$ENV{TZ} = 'UTC';
  70$| = 1; # unbuffer STDOUT
  71
  72# All SVN commands do it.  Otherwise we may die on SIGPIPE when the remote
  73# repository decides to close the connection which we expect to be kept alive.
  74$SIG{PIPE} = 'IGNORE';
  75
  76# Given a dot separated version number, "subtract" it from
  77# the SVN::Core::VERSION; non-negaitive return means the SVN::Core
  78# is at least at the version the caller asked for.
  79sub compare_svn_version {
  80        my (@ours) = split(/\./, $SVN::Core::VERSION);
  81        my (@theirs) = split(/\./, $_[0]);
  82        my ($i, $diff);
  83
  84        for ($i = 0; $i < @ours && $i < @theirs; $i++) {
  85                $diff = $ours[$i] - $theirs[$i];
  86                return $diff if ($diff);
  87        }
  88        return 1 if ($i < @ours);
  89        return -1 if ($i < @theirs);
  90        return 0;
  91}
  92
  93sub _req_svn {
  94        require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
  95        require SVN::Ra;
  96        require SVN::Delta;
  97        if (::compare_svn_version('1.1.0') < 0) {
  98                fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
  99        }
 100}
 101
 102$sha1 = qr/[a-f\d]{40}/;
 103$sha1_short = qr/[a-f\d]{4,40}/;
 104my ($_stdin, $_help, $_edit,
 105        $_message, $_file, $_branch_dest,
 106        $_template, $_shared,
 107        $_version, $_fetch_all, $_no_rebase, $_fetch_parent,
 108        $_merge, $_strategy, $_preserve_merges, $_dry_run, $_local,
 109        $_prefix, $_no_checkout, $_url, $_verbose,
 110        $_commit_url, $_tag, $_merge_info, $_interactive);
 111
 112# This is a refactoring artifact so Git::SVN can get at this git-svn switch.
 113sub opt_prefix { return $_prefix || '' }
 114
 115$Git::SVN::Fetcher::_placeholder_filename = ".gitignore";
 116$_q ||= 0;
 117my %remote_opts = ( 'username=s' => \$Git::SVN::Prompt::_username,
 118                    'config-dir=s' => \$Git::SVN::Ra::config_dir,
 119                    'no-auth-cache' => \$Git::SVN::Prompt::_no_auth_cache,
 120                    'ignore-paths=s' => \$Git::SVN::Fetcher::_ignore_regex,
 121                    'ignore-refs=s' => \$Git::SVN::Ra::_ignore_refs_regex );
 122my %fc_opts = ( 'follow-parent|follow!' => \$Git::SVN::_follow_parent,
 123                'authors-file|A=s' => \$_authors,
 124                'authors-prog=s' => \$_authors_prog,
 125                'repack:i' => \$Git::SVN::_repack,
 126                'noMetadata' => \$Git::SVN::_no_metadata,
 127                'useSvmProps' => \$Git::SVN::_use_svm_props,
 128                'useSvnsyncProps' => \$Git::SVN::_use_svnsync_props,
 129                'log-window-size=i' => \$Git::SVN::Ra::_log_window_size,
 130                'no-checkout' => \$_no_checkout,
 131                'quiet|q+' => \$_q,
 132                'repack-flags|repack-args|repack-opts=s' =>
 133                   \$Git::SVN::_repack_flags,
 134                'use-log-author' => \$Git::SVN::_use_log_author,
 135                'add-author-from' => \$Git::SVN::_add_author_from,
 136                'localtime' => \$Git::SVN::_localtime,
 137                %remote_opts );
 138
 139my ($_trunk, @_tags, @_branches, $_stdlayout);
 140my %icv;
 141my %init_opts = ( 'template=s' => \$_template, 'shared:s' => \$_shared,
 142                  'trunk|T=s' => \$_trunk, 'tags|t=s@' => \@_tags,
 143                  'branches|b=s@' => \@_branches, 'prefix=s' => \$_prefix,
 144                  'stdlayout|s' => \$_stdlayout,
 145                  'minimize-url|m!' => \$Git::SVN::_minimize_url,
 146                  'no-metadata' => sub { $icv{noMetadata} = 1 },
 147                  'use-svm-props' => sub { $icv{useSvmProps} = 1 },
 148                  'use-svnsync-props' => sub { $icv{useSvnsyncProps} = 1 },
 149                  'rewrite-root=s' => sub { $icv{rewriteRoot} = $_[1] },
 150                  'rewrite-uuid=s' => sub { $icv{rewriteUUID} = $_[1] },
 151                  %remote_opts );
 152my %cmt_opts = ( 'edit|e' => \$_edit,
 153                'rmdir' => \$Git::SVN::Editor::_rmdir,
 154                'find-copies-harder' => \$Git::SVN::Editor::_find_copies_harder,
 155                'l=i' => \$Git::SVN::Editor::_rename_limit,
 156                'copy-similarity|C=i'=> \$Git::SVN::Editor::_cp_similarity
 157);
 158
 159my %cmd = (
 160        fetch => [ \&cmd_fetch, "Download new revisions from SVN",
 161                        { 'revision|r=s' => \$_revision,
 162                          'fetch-all|all' => \$_fetch_all,
 163                          'parent|p' => \$_fetch_parent,
 164                           %fc_opts } ],
 165        clone => [ \&cmd_clone, "Initialize and fetch revisions",
 166                        { 'revision|r=s' => \$_revision,
 167                          'preserve-empty-dirs' =>
 168                                \$Git::SVN::Fetcher::_preserve_empty_dirs,
 169                          'placeholder-filename=s' =>
 170                                \$Git::SVN::Fetcher::_placeholder_filename,
 171                           %fc_opts, %init_opts } ],
 172        init => [ \&cmd_init, "Initialize a repo for tracking" .
 173                          " (requires URL argument)",
 174                          \%init_opts ],
 175        'multi-init' => [ \&cmd_multi_init,
 176                          "Deprecated alias for ".
 177                          "'$0 init -T<trunk> -b<branches> -t<tags>'",
 178                          \%init_opts ],
 179        dcommit => [ \&cmd_dcommit,
 180                     'Commit several diffs to merge with upstream',
 181                        { 'merge|m|M' => \$_merge,
 182                          'strategy|s=s' => \$_strategy,
 183                          'verbose|v' => \$_verbose,
 184                          'dry-run|n' => \$_dry_run,
 185                          'fetch-all|all' => \$_fetch_all,
 186                          'commit-url=s' => \$_commit_url,
 187                          'revision|r=i' => \$_revision,
 188                          'no-rebase' => \$_no_rebase,
 189                          'mergeinfo=s' => \$_merge_info,
 190                          'interactive|i' => \$_interactive,
 191                        %cmt_opts, %fc_opts } ],
 192        branch => [ \&cmd_branch,
 193                    'Create a branch in the SVN repository',
 194                    { 'message|m=s' => \$_message,
 195                      'destination|d=s' => \$_branch_dest,
 196                      'dry-run|n' => \$_dry_run,
 197                      'tag|t' => \$_tag,
 198                      'username=s' => \$Git::SVN::Prompt::_username,
 199                      'commit-url=s' => \$_commit_url } ],
 200        tag => [ sub { $_tag = 1; cmd_branch(@_) },
 201                 'Create a tag in the SVN repository',
 202                 { 'message|m=s' => \$_message,
 203                   'destination|d=s' => \$_branch_dest,
 204                   'dry-run|n' => \$_dry_run,
 205                   'username=s' => \$Git::SVN::Prompt::_username,
 206                   'commit-url=s' => \$_commit_url } ],
 207        'set-tree' => [ \&cmd_set_tree,
 208                        "Set an SVN repository to a git tree-ish",
 209                        { 'stdin' => \$_stdin, %cmt_opts, %fc_opts, } ],
 210        'create-ignore' => [ \&cmd_create_ignore,
 211                             'Create a .gitignore per svn:ignore',
 212                             { 'revision|r=i' => \$_revision
 213                             } ],
 214        'mkdirs' => [ \&cmd_mkdirs ,
 215                      "recreate empty directories after a checkout",
 216                      { 'revision|r=i' => \$_revision } ],
 217        'propget' => [ \&cmd_propget,
 218                       'Print the value of a property on a file or directory',
 219                       { 'revision|r=i' => \$_revision } ],
 220        'proplist' => [ \&cmd_proplist,
 221                       'List all properties of a file or directory',
 222                       { 'revision|r=i' => \$_revision } ],
 223        'show-ignore' => [ \&cmd_show_ignore, "Show svn:ignore listings",
 224                        { 'revision|r=i' => \$_revision
 225                        } ],
 226        'show-externals' => [ \&cmd_show_externals, "Show svn:externals listings",
 227                        { 'revision|r=i' => \$_revision
 228                        } ],
 229        'multi-fetch' => [ \&cmd_multi_fetch,
 230                           "Deprecated alias for $0 fetch --all",
 231                           { 'revision|r=s' => \$_revision, %fc_opts } ],
 232        'migrate' => [ sub { },
 233                       # no-op, we automatically run this anyways,
 234                       'Migrate configuration/metadata/layout from
 235                        previous versions of git-svn',
 236                       { 'minimize' => \$Git::SVN::Migration::_minimize,
 237                         %remote_opts } ],
 238        'log' => [ \&Git::SVN::Log::cmd_show_log, 'Show commit logs',
 239                        { 'limit=i' => \$Git::SVN::Log::limit,
 240                          'revision|r=s' => \$_revision,
 241                          'verbose|v' => \$Git::SVN::Log::verbose,
 242                          'incremental' => \$Git::SVN::Log::incremental,
 243                          'oneline' => \$Git::SVN::Log::oneline,
 244                          'show-commit' => \$Git::SVN::Log::show_commit,
 245                          'non-recursive' => \$Git::SVN::Log::non_recursive,
 246                          'authors-file|A=s' => \$_authors,
 247                          'color' => \$Git::SVN::Log::color,
 248                          'pager=s' => \$Git::SVN::Log::pager
 249                        } ],
 250        'find-rev' => [ \&cmd_find_rev,
 251                        "Translate between SVN revision numbers and tree-ish",
 252                        {} ],
 253        'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
 254                        { 'merge|m|M' => \$_merge,
 255                          'verbose|v' => \$_verbose,
 256                          'strategy|s=s' => \$_strategy,
 257                          'local|l' => \$_local,
 258                          'fetch-all|all' => \$_fetch_all,
 259                          'dry-run|n' => \$_dry_run,
 260                          'preserve-merges|p' => \$_preserve_merges,
 261                          %fc_opts } ],
 262        'commit-diff' => [ \&cmd_commit_diff,
 263                           'Commit a diff between two trees',
 264                        { 'message|m=s' => \$_message,
 265                          'file|F=s' => \$_file,
 266                          'revision|r=s' => \$_revision,
 267                        %cmt_opts } ],
 268        'info' => [ \&cmd_info,
 269                    "Show info about the latest SVN revision
 270                     on the current branch",
 271                    { 'url' => \$_url, } ],
 272        'blame' => [ \&Git::SVN::Log::cmd_blame,
 273                    "Show what revision and author last modified each line of a file",
 274                    { 'git-format' => \$Git::SVN::Log::_git_format } ],
 275        'reset' => [ \&cmd_reset,
 276                     "Undo fetches back to the specified SVN revision",
 277                     { 'revision|r=s' => \$_revision,
 278                       'parent|p' => \$_fetch_parent } ],
 279        'gc' => [ \&cmd_gc,
 280                  "Compress unhandled.log files in .git/svn and remove " .
 281                  "index files in .git/svn",
 282                {} ],
 283);
 284
 285use Term::ReadLine;
 286package FakeTerm;
 287sub new {
 288        my ($class, $reason) = @_;
 289        return bless \$reason, shift;
 290}
 291sub readline {
 292        my $self = shift;
 293        die "Cannot use readline on FakeTerm: $$self";
 294}
 295package main;
 296
 297my $term = eval {
 298        $ENV{"GIT_SVN_NOTTY"}
 299                ? new Term::ReadLine 'git-svn', \*STDIN, \*STDOUT
 300                : new Term::ReadLine 'git-svn';
 301};
 302if ($@) {
 303        $term = new FakeTerm "$@: going non-interactive";
 304}
 305
 306my $cmd;
 307for (my $i = 0; $i < @ARGV; $i++) {
 308        if (defined $cmd{$ARGV[$i]}) {
 309                $cmd = $ARGV[$i];
 310                splice @ARGV, $i, 1;
 311                last;
 312        } elsif ($ARGV[$i] eq 'help') {
 313                $cmd = $ARGV[$i+1];
 314                usage(0);
 315        }
 316};
 317
 318# make sure we're always running at the top-level working directory
 319unless ($cmd && $cmd =~ /(?:clone|init|multi-init)$/) {
 320        unless (-d $ENV{GIT_DIR}) {
 321                if ($git_dir_user_set) {
 322                        die "GIT_DIR=$ENV{GIT_DIR} explicitly set, ",
 323                            "but it is not a directory\n";
 324                }
 325                my $git_dir = delete $ENV{GIT_DIR};
 326                my $cdup = undef;
 327                git_cmd_try {
 328                        $cdup = command_oneline(qw/rev-parse --show-cdup/);
 329                        $git_dir = '.' unless ($cdup);
 330                        chomp $cdup if ($cdup);
 331                        $cdup = "." unless ($cdup && length $cdup);
 332                } "Already at toplevel, but $git_dir not found\n";
 333                chdir $cdup or die "Unable to chdir up to '$cdup'\n";
 334                unless (-d $git_dir) {
 335                        die "$git_dir still not found after going to ",
 336                            "'$cdup'\n";
 337                }
 338                $ENV{GIT_DIR} = $git_dir;
 339        }
 340        $_repository = Git->repository(Repository => $ENV{GIT_DIR});
 341}
 342
 343my %opts = %{$cmd{$cmd}->[2]} if (defined $cmd);
 344
 345read_git_config(\%opts);
 346if ($cmd && ($cmd eq 'log' || $cmd eq 'blame')) {
 347        Getopt::Long::Configure('pass_through');
 348}
 349my $rv = GetOptions(%opts, 'h|H' => \$_help, 'version|V' => \$_version,
 350                    'minimize-connections' => \$Git::SVN::Migration::_minimize,
 351                    'id|i=s' => \$Git::SVN::default_ref_id,
 352                    'svn-remote|remote|R=s' => sub {
 353                       $Git::SVN::no_reuse_existing = 1;
 354                       $Git::SVN::default_repo_id = $_[1] });
 355exit 1 if (!$rv && $cmd && $cmd ne 'log');
 356
 357usage(0) if $_help;
 358version() if $_version;
 359usage(1) unless defined $cmd;
 360load_authors() if $_authors;
 361if (defined $_authors_prog) {
 362        $_authors_prog = "'" . File::Spec->rel2abs($_authors_prog) . "'";
 363}
 364
 365unless ($cmd =~ /^(?:clone|init|multi-init|commit-diff)$/) {
 366        Git::SVN::Migration::migration_check();
 367}
 368Git::SVN::init_vars();
 369eval {
 370        Git::SVN::verify_remotes_sanity();
 371        $cmd{$cmd}->[0]->(@ARGV);
 372        post_fetch_checkout();
 373};
 374fatal $@ if $@;
 375exit 0;
 376
 377####################### primary functions ######################
 378sub usage {
 379        my $exit = shift || 0;
 380        my $fd = $exit ? \*STDERR : \*STDOUT;
 381        print $fd <<"";
 382git-svn - bidirectional operations between a single Subversion tree and git
 383Usage: git svn <command> [options] [arguments]\n
 384
 385        print $fd "Available commands:\n" unless $cmd;
 386
 387        foreach (sort keys %cmd) {
 388                next if $cmd && $cmd ne $_;
 389                next if /^multi-/; # don't show deprecated commands
 390                print $fd '  ',pack('A17',$_),$cmd{$_}->[1],"\n";
 391                foreach (sort keys %{$cmd{$_}->[2]}) {
 392                        # mixed-case options are for .git/config only
 393                        next if /[A-Z]/ && /^[a-z]+$/i;
 394                        # prints out arguments as they should be passed:
 395                        my $x = s#[:=]s$## ? '<arg>' : s#[:=]i$## ? '<num>' : '';
 396                        print $fd ' ' x 21, join(', ', map { length $_ > 1 ?
 397                                                        "--$_" : "-$_" }
 398                                                split /\|/,$_)," $x\n";
 399                }
 400        }
 401        print $fd <<"";
 402\nGIT_SVN_ID may be set in the environment or via the --id/-i switch to an
 403arbitrary identifier if you're tracking multiple SVN branches/repositories in
 404one git repository and want to keep them separate.  See git-svn(1) for more
 405information.
 406
 407        exit $exit;
 408}
 409
 410sub version {
 411        ::_req_svn();
 412        print "git-svn version $VERSION (svn $SVN::Core::VERSION)\n";
 413        exit 0;
 414}
 415
 416sub ask {
 417        my ($prompt, %arg) = @_;
 418        my $valid_re = $arg{valid_re};
 419        my $default = $arg{default};
 420        my $resp;
 421        my $i = 0;
 422
 423        if ( !( defined($term->IN)
 424            && defined( fileno($term->IN) )
 425            && defined( $term->OUT )
 426            && defined( fileno($term->OUT) ) ) ){
 427                return defined($default) ? $default : undef;
 428        }
 429
 430        while ($i++ < 10) {
 431                $resp = $term->readline($prompt);
 432                if (!defined $resp) { # EOF
 433                        print "\n";
 434                        return defined $default ? $default : undef;
 435                }
 436                if ($resp eq '' and defined $default) {
 437                        return $default;
 438                }
 439                if (!defined $valid_re or $resp =~ /$valid_re/) {
 440                        return $resp;
 441                }
 442        }
 443        return undef;
 444}
 445
 446sub do_git_init_db {
 447        unless (-d $ENV{GIT_DIR}) {
 448                my @init_db = ('init');
 449                push @init_db, "--template=$_template" if defined $_template;
 450                if (defined $_shared) {
 451                        if ($_shared =~ /[a-z]/) {
 452                                push @init_db, "--shared=$_shared";
 453                        } else {
 454                                push @init_db, "--shared";
 455                        }
 456                }
 457                command_noisy(@init_db);
 458                $_repository = Git->repository(Repository => ".git");
 459        }
 460        my $set;
 461        my $pfx = "svn-remote.$Git::SVN::default_repo_id";
 462        foreach my $i (keys %icv) {
 463                die "'$set' and '$i' cannot both be set\n" if $set;
 464                next unless defined $icv{$i};
 465                command_noisy('config', "$pfx.$i", $icv{$i});
 466                $set = $i;
 467        }
 468        my $ignore_paths_regex = \$Git::SVN::Fetcher::_ignore_regex;
 469        command_noisy('config', "$pfx.ignore-paths", $$ignore_paths_regex)
 470                if defined $$ignore_paths_regex;
 471        my $ignore_refs_regex = \$Git::SVN::Ra::_ignore_refs_regex;
 472        command_noisy('config', "$pfx.ignore-refs", $$ignore_refs_regex)
 473                if defined $$ignore_refs_regex;
 474
 475        if (defined $Git::SVN::Fetcher::_preserve_empty_dirs) {
 476                my $fname = \$Git::SVN::Fetcher::_placeholder_filename;
 477                command_noisy('config', "$pfx.preserve-empty-dirs", 'true');
 478                command_noisy('config', "$pfx.placeholder-filename", $$fname);
 479        }
 480}
 481
 482sub init_subdir {
 483        my $repo_path = shift or return;
 484        mkpath([$repo_path]) unless -d $repo_path;
 485        chdir $repo_path or die "Couldn't chdir to $repo_path: $!\n";
 486        $ENV{GIT_DIR} = '.git';
 487        $_repository = Git->repository(Repository => $ENV{GIT_DIR});
 488}
 489
 490sub cmd_clone {
 491        my ($url, $path) = @_;
 492        if (!defined $path &&
 493            (defined $_trunk || @_branches || @_tags ||
 494             defined $_stdlayout) &&
 495            $url !~ m#^[a-z\+]+://#) {
 496                $path = $url;
 497        }
 498        $path = basename($url) if !defined $path || !length $path;
 499        my $authors_absolute = $_authors ? File::Spec->rel2abs($_authors) : "";
 500        cmd_init($url, $path);
 501        command_oneline('config', 'svn.authorsfile', $authors_absolute)
 502            if $_authors;
 503        Git::SVN::fetch_all($Git::SVN::default_repo_id);
 504}
 505
 506sub cmd_init {
 507        if (defined $_stdlayout) {
 508                $_trunk = 'trunk' if (!defined $_trunk);
 509                @_tags = 'tags' if (! @_tags);
 510                @_branches = 'branches' if (! @_branches);
 511        }
 512        if (defined $_trunk || @_branches || @_tags) {
 513                return cmd_multi_init(@_);
 514        }
 515        my $url = shift or die "SVN repository location required ",
 516                               "as a command-line argument\n";
 517        $url = canonicalize_url($url);
 518        init_subdir(@_);
 519        do_git_init_db();
 520
 521        if ($Git::SVN::_minimize_url eq 'unset') {
 522                $Git::SVN::_minimize_url = 0;
 523        }
 524
 525        Git::SVN->init($url);
 526}
 527
 528sub cmd_fetch {
 529        if (grep /^\d+=./, @_) {
 530                die "'<rev>=<commit>' fetch arguments are ",
 531                    "no longer supported.\n";
 532        }
 533        my ($remote) = @_;
 534        if (@_ > 1) {
 535                die "Usage: $0 fetch [--all] [--parent] [svn-remote]\n";
 536        }
 537        $Git::SVN::no_reuse_existing = undef;
 538        if ($_fetch_parent) {
 539                my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
 540                unless ($gs) {
 541                        die "Unable to determine upstream SVN information from ",
 542                            "working tree history\n";
 543                }
 544                # just fetch, don't checkout.
 545                $_no_checkout = 'true';
 546                $_fetch_all ? $gs->fetch_all : $gs->fetch;
 547        } elsif ($_fetch_all) {
 548                cmd_multi_fetch();
 549        } else {
 550                $remote ||= $Git::SVN::default_repo_id;
 551                Git::SVN::fetch_all($remote, Git::SVN::read_all_remotes());
 552        }
 553}
 554
 555sub cmd_set_tree {
 556        my (@commits) = @_;
 557        if ($_stdin || !@commits) {
 558                print "Reading from stdin...\n";
 559                @commits = ();
 560                while (<STDIN>) {
 561                        if (/\b($sha1_short)\b/o) {
 562                                unshift @commits, $1;
 563                        }
 564                }
 565        }
 566        my @revs;
 567        foreach my $c (@commits) {
 568                my @tmp = command('rev-parse',$c);
 569                if (scalar @tmp == 1) {
 570                        push @revs, $tmp[0];
 571                } elsif (scalar @tmp > 1) {
 572                        push @revs, reverse(command('rev-list',@tmp));
 573                } else {
 574                        fatal "Failed to rev-parse $c";
 575                }
 576        }
 577        my $gs = Git::SVN->new;
 578        my ($r_last, $cmt_last) = $gs->last_rev_commit;
 579        $gs->fetch;
 580        if (defined $gs->{last_rev} && $r_last != $gs->{last_rev}) {
 581                fatal "There are new revisions that were fetched ",
 582                      "and need to be merged (or acknowledged) ",
 583                      "before committing.\nlast rev: $r_last\n",
 584                      " current: $gs->{last_rev}";
 585        }
 586        $gs->set_tree($_) foreach @revs;
 587        print "Done committing ",scalar @revs," revisions to SVN\n";
 588        unlink $gs->{index};
 589}
 590
 591sub split_merge_info_range {
 592        my ($range) = @_;
 593        if ($range =~ /(\d+)-(\d+)/) {
 594                return (int($1), int($2));
 595        } else {
 596                return (int($range), int($range));
 597        }
 598}
 599
 600sub combine_ranges {
 601        my ($in) = @_;
 602
 603        my @fnums = ();
 604        my @arr = split(/,/, $in);
 605        for my $element (@arr) {
 606                my ($start, $end) = split_merge_info_range($element);
 607                push @fnums, $start;
 608        }
 609
 610        my @sorted = @arr [ sort {
 611                $fnums[$a] <=> $fnums[$b]
 612        } 0..$#arr ];
 613
 614        my @return = ();
 615        my $last = -1;
 616        my $first = -1;
 617        for my $element (@sorted) {
 618                my ($start, $end) = split_merge_info_range($element);
 619
 620                if ($last == -1) {
 621                        $first = $start;
 622                        $last = $end;
 623                        next;
 624                }
 625                if ($start <= $last+1) {
 626                        if ($end > $last) {
 627                                $last = $end;
 628                        }
 629                        next;
 630                }
 631                if ($first == $last) {
 632                        push @return, "$first";
 633                } else {
 634                        push @return, "$first-$last";
 635                }
 636                $first = $start;
 637                $last = $end;
 638        }
 639
 640        if ($first != -1) {
 641                if ($first == $last) {
 642                        push @return, "$first";
 643                } else {
 644                        push @return, "$first-$last";
 645                }
 646        }
 647
 648        return join(',', @return);
 649}
 650
 651sub merge_revs_into_hash {
 652        my ($hash, $minfo) = @_;
 653        my @lines = split(' ', $minfo);
 654
 655        for my $line (@lines) {
 656                my ($branchpath, $revs) = split(/:/, $line);
 657
 658                if (exists($hash->{$branchpath})) {
 659                        # Merge the two revision sets
 660                        my $combined = "$hash->{$branchpath},$revs";
 661                        $hash->{$branchpath} = combine_ranges($combined);
 662                } else {
 663                        # Just do range combining for consolidation
 664                        $hash->{$branchpath} = combine_ranges($revs);
 665                }
 666        }
 667}
 668
 669sub merge_merge_info {
 670        my ($mergeinfo_one, $mergeinfo_two) = @_;
 671        my %result_hash = ();
 672
 673        merge_revs_into_hash(\%result_hash, $mergeinfo_one);
 674        merge_revs_into_hash(\%result_hash, $mergeinfo_two);
 675
 676        my $result = '';
 677        # Sort below is for consistency's sake
 678        for my $branchname (sort keys(%result_hash)) {
 679                my $revlist = $result_hash{$branchname};
 680                $result .= "$branchname:$revlist\n"
 681        }
 682        return $result;
 683}
 684
 685sub populate_merge_info {
 686        my ($d, $gs, $uuid, $linear_refs, $rewritten_parent) = @_;
 687
 688        my %parentshash;
 689        read_commit_parents(\%parentshash, $d);
 690        my @parents = @{$parentshash{$d}};
 691        if ($#parents > 0) {
 692                # Merge commit
 693                my $all_parents_ok = 1;
 694                my $aggregate_mergeinfo = '';
 695                my $rooturl = $gs->repos_root;
 696
 697                if (defined($rewritten_parent)) {
 698                        # Replace first parent with newly-rewritten version
 699                        shift @parents;
 700                        unshift @parents, $rewritten_parent;
 701                }
 702
 703                foreach my $parent (@parents) {
 704                        my ($branchurl, $svnrev, $paruuid) =
 705                                cmt_metadata($parent);
 706
 707                        unless (defined($svnrev)) {
 708                                # Should have been caught be preflight check
 709                                fatal "merge commit $d has ancestor $parent, but that change "
 710                     ."does not have git-svn metadata!";
 711                        }
 712                        unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
 713                                fatal "commit $parent git-svn metadata changed mid-run!";
 714                        }
 715                        my $branchpath = $1;
 716
 717                        my $ra = Git::SVN::Ra->new($branchurl);
 718                        my (undef, undef, $props) =
 719                                $ra->get_dir(canonicalize_path("."), $svnrev);
 720                        my $par_mergeinfo = $props->{'svn:mergeinfo'};
 721                        unless (defined $par_mergeinfo) {
 722                                $par_mergeinfo = '';
 723                        }
 724                        # Merge previous mergeinfo values
 725                        $aggregate_mergeinfo =
 726                                merge_merge_info($aggregate_mergeinfo,
 727                                                                 $par_mergeinfo, 0);
 728
 729                        next if $parent eq $parents[0]; # Skip first parent
 730                        # Add new changes being placed in tree by merge
 731                        my @cmd = (qw/rev-list --reverse/,
 732                                           $parent, qw/--not/);
 733                        foreach my $par (@parents) {
 734                                unless ($par eq $parent) {
 735                                        push @cmd, $par;
 736                                }
 737                        }
 738                        my @revsin = ();
 739                        my ($revlist, $ctx) = command_output_pipe(@cmd);
 740                        while (<$revlist>) {
 741                                my $irev = $_;
 742                                chomp $irev;
 743                                my (undef, $csvnrev, undef) =
 744                                        cmt_metadata($irev);
 745                                unless (defined $csvnrev) {
 746                                        # A child is missing SVN annotations...
 747                                        # this might be OK, or might not be.
 748                                        warn "W:child $irev is merged into revision "
 749                                                 ."$d but does not have git-svn metadata. "
 750                                                 ."This means git-svn cannot determine the "
 751                                                 ."svn revision numbers to place into the "
 752                                                 ."svn:mergeinfo property. You must ensure "
 753                                                 ."a branch is entirely committed to "
 754                                                 ."SVN before merging it in order for "
 755                                                 ."svn:mergeinfo population to function "
 756                                                 ."properly";
 757                                }
 758                                push @revsin, $csvnrev;
 759                        }
 760                        command_close_pipe($revlist, $ctx);
 761
 762                        last unless $all_parents_ok;
 763
 764                        # We now have a list of all SVN revnos which are
 765                        # merged by this particular parent. Integrate them.
 766                        next if $#revsin == -1;
 767                        my $newmergeinfo = "$branchpath:" . join(',', @revsin);
 768                        $aggregate_mergeinfo =
 769                                merge_merge_info($aggregate_mergeinfo,
 770                                                                 $newmergeinfo, 1);
 771                }
 772                if ($all_parents_ok and $aggregate_mergeinfo) {
 773                        return $aggregate_mergeinfo;
 774                }
 775        }
 776
 777        return undef;
 778}
 779
 780sub cmd_dcommit {
 781        my $head = shift;
 782        command_noisy(qw/update-index --refresh/);
 783        git_cmd_try { command_oneline(qw/diff-index --quiet HEAD/) }
 784                'Cannot dcommit with a dirty index.  Commit your changes first, '
 785                . "or stash them with `git stash'.\n";
 786        $head ||= 'HEAD';
 787
 788        my $old_head;
 789        if ($head ne 'HEAD') {
 790                $old_head = eval {
 791                        command_oneline([qw/symbolic-ref -q HEAD/])
 792                };
 793                if ($old_head) {
 794                        $old_head =~ s{^refs/heads/}{};
 795                } else {
 796                        $old_head = eval { command_oneline(qw/rev-parse HEAD/) };
 797                }
 798                command(['checkout', $head], STDERR => 0);
 799        }
 800
 801        my @refs;
 802        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD', \@refs);
 803        unless ($gs) {
 804                die "Unable to determine upstream SVN information from ",
 805                    "$head history.\nPerhaps the repository is empty.";
 806        }
 807
 808        if (defined $_commit_url) {
 809                $url = $_commit_url;
 810        } else {
 811                $url = eval { command_oneline('config', '--get',
 812                              "svn-remote.$gs->{repo_id}.commiturl") };
 813                if (!$url) {
 814                        $url = $gs->full_pushurl
 815                }
 816        }
 817
 818        my $last_rev = $_revision if defined $_revision;
 819        if ($url) {
 820                print "Committing to $url ...\n";
 821        }
 822        my ($linear_refs, $parents) = linearize_history($gs, \@refs);
 823        if ($_no_rebase && scalar(@$linear_refs) > 1) {
 824                warn "Attempting to commit more than one change while ",
 825                     "--no-rebase is enabled.\n",
 826                     "If these changes depend on each other, re-running ",
 827                     "without --no-rebase may be required."
 828        }
 829
 830        if (defined $_interactive){
 831                my $ask_default = "y";
 832                foreach my $d (@$linear_refs){
 833                        my ($fh, $ctx) = command_output_pipe(qw(show --summary), "$d");
 834                        while (<$fh>){
 835                                print $_;
 836                        }
 837                        command_close_pipe($fh, $ctx);
 838                        $_ = ask("Commit this patch to SVN? ([y]es (default)|[n]o|[q]uit|[a]ll): ",
 839                                 valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
 840                                 default => $ask_default);
 841                        die "Commit this patch reply required" unless defined $_;
 842                        if (/^[nq]/i) {
 843                                exit(0);
 844                        } elsif (/^a/i) {
 845                                last;
 846                        }
 847                }
 848        }
 849
 850        my $expect_url = $url;
 851
 852        my $push_merge_info = eval {
 853                command_oneline(qw/config --get svn.pushmergeinfo/)
 854                };
 855        if (not defined($push_merge_info)
 856                        or $push_merge_info eq "false"
 857                        or $push_merge_info eq "no"
 858                        or $push_merge_info eq "never") {
 859                $push_merge_info = 0;
 860        }
 861
 862        unless (defined($_merge_info) || ! $push_merge_info) {
 863                # Preflight check of changes to ensure no issues with mergeinfo
 864                # This includes check for uncommitted-to-SVN parents
 865                # (other than the first parent, which we will handle),
 866                # information from different SVN repos, and paths
 867                # which are not underneath this repository root.
 868                my $rooturl = $gs->repos_root;
 869                foreach my $d (@$linear_refs) {
 870                        my %parentshash;
 871                        read_commit_parents(\%parentshash, $d);
 872                        my @realparents = @{$parentshash{$d}};
 873                        if ($#realparents > 0) {
 874                                # Merge commit
 875                                shift @realparents; # Remove/ignore first parent
 876                                foreach my $parent (@realparents) {
 877                                        my ($branchurl, $svnrev, $paruuid) = cmt_metadata($parent);
 878                                        unless (defined $paruuid) {
 879                                                # A parent is missing SVN annotations...
 880                                                # abort the whole operation.
 881                                                fatal "$parent is merged into revision $d, "
 882                                                         ."but does not have git-svn metadata. "
 883                                                         ."Either dcommit the branch or use a "
 884                                                         ."local cherry-pick, FF merge, or rebase "
 885                                                         ."instead of an explicit merge commit.";
 886                                        }
 887
 888                                        unless ($paruuid eq $uuid) {
 889                                                # Parent has SVN metadata from different repository
 890                                                fatal "merge parent $parent for change $d has "
 891                                                         ."git-svn uuid $paruuid, while current change "
 892                                                         ."has uuid $uuid!";
 893                                        }
 894
 895                                        unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
 896                                                # This branch is very strange indeed.
 897                                                fatal "merge parent $parent for $d is on branch "
 898                                                         ."$branchurl, which is not under the "
 899                                                         ."git-svn root $rooturl!";
 900                                        }
 901                                }
 902                        }
 903                }
 904        }
 905
 906        my $rewritten_parent;
 907        Git::SVN::remove_username($expect_url);
 908        if (defined($_merge_info)) {
 909                $_merge_info =~ tr{ }{\n};
 910        }
 911        while (1) {
 912                my $d = shift @$linear_refs or last;
 913                unless (defined $last_rev) {
 914                        (undef, $last_rev, undef) = cmt_metadata("$d~1");
 915                        unless (defined $last_rev) {
 916                                fatal "Unable to extract revision information ",
 917                                      "from commit $d~1";
 918                        }
 919                }
 920                if ($_dry_run) {
 921                        print "diff-tree $d~1 $d\n";
 922                } else {
 923                        my $cmt_rev;
 924
 925                        unless (defined($_merge_info) || ! $push_merge_info) {
 926                                $_merge_info = populate_merge_info($d, $gs,
 927                                                             $uuid,
 928                                                             $linear_refs,
 929                                                             $rewritten_parent);
 930                        }
 931
 932                        my %ed_opts = ( r => $last_rev,
 933                                        log => get_commit_entry($d)->{log},
 934                                        ra => Git::SVN::Ra->new($url),
 935                                        config => SVN::Core::config_get_config(
 936                                                $Git::SVN::Ra::config_dir
 937                                        ),
 938                                        tree_a => "$d~1",
 939                                        tree_b => $d,
 940                                        editor_cb => sub {
 941                                               print "Committed r$_[0]\n";
 942                                               $cmt_rev = $_[0];
 943                                        },
 944                                        mergeinfo => $_merge_info,
 945                                        svn_path => '');
 946                        if (!Git::SVN::Editor->new(\%ed_opts)->apply_diff) {
 947                                print "No changes\n$d~1 == $d\n";
 948                        } elsif ($parents->{$d} && @{$parents->{$d}}) {
 949                                $gs->{inject_parents_dcommit}->{$cmt_rev} =
 950                                                               $parents->{$d};
 951                        }
 952                        $_fetch_all ? $gs->fetch_all : $gs->fetch;
 953                        $last_rev = $cmt_rev;
 954                        next if $_no_rebase;
 955
 956                        # we always want to rebase against the current HEAD,
 957                        # not any head that was passed to us
 958                        my @diff = command('diff-tree', $d,
 959                                           $gs->refname, '--');
 960                        my @finish;
 961                        if (@diff) {
 962                                @finish = rebase_cmd();
 963                                print STDERR "W: $d and ", $gs->refname,
 964                                             " differ, using @finish:\n",
 965                                             join("\n", @diff), "\n";
 966                        } else {
 967                                print "No changes between current HEAD and ",
 968                                      $gs->refname,
 969                                      "\nResetting to the latest ",
 970                                      $gs->refname, "\n";
 971                                @finish = qw/reset --mixed/;
 972                        }
 973                        command_noisy(@finish, $gs->refname);
 974
 975                        $rewritten_parent = command_oneline(qw/rev-parse HEAD/);
 976
 977                        if (@diff) {
 978                                @refs = ();
 979                                my ($url_, $rev_, $uuid_, $gs_) =
 980                                              working_head_info('HEAD', \@refs);
 981                                my ($linear_refs_, $parents_) =
 982                                              linearize_history($gs_, \@refs);
 983                                if (scalar(@$linear_refs) !=
 984                                    scalar(@$linear_refs_)) {
 985                                        fatal "# of revisions changed ",
 986                                          "\nbefore:\n",
 987                                          join("\n", @$linear_refs),
 988                                          "\n\nafter:\n",
 989                                          join("\n", @$linear_refs_), "\n",
 990                                          'If you are attempting to commit ',
 991                                          "merges, try running:\n\t",
 992                                          'git rebase --interactive',
 993                                          '--preserve-merges ',
 994                                          $gs->refname,
 995                                          "\nBefore dcommitting";
 996                                }
 997                                if ($url_ ne $expect_url) {
 998                                        if ($url_ eq $gs->metadata_url) {
 999                                                print
1000                                                  "Accepting rewritten URL:",
1001                                                  " $url_\n";
1002                                        } else {
1003                                                fatal
1004                                                  "URL mismatch after rebase:",
1005                                                  " $url_ != $expect_url";
1006                                        }
1007                                }
1008                                if ($uuid_ ne $uuid) {
1009                                        fatal "uuid mismatch after rebase: ",
1010                                              "$uuid_ != $uuid";
1011                                }
1012                                # remap parents
1013                                my (%p, @l, $i);
1014                                for ($i = 0; $i < scalar @$linear_refs; $i++) {
1015                                        my $new = $linear_refs_->[$i] or next;
1016                                        $p{$new} =
1017                                                $parents->{$linear_refs->[$i]};
1018                                        push @l, $new;
1019                                }
1020                                $parents = \%p;
1021                                $linear_refs = \@l;
1022                        }
1023                }
1024        }
1025
1026        if ($old_head) {
1027                my $new_head = command_oneline(qw/rev-parse HEAD/);
1028                my $new_is_symbolic = eval {
1029                        command_oneline(qw/symbolic-ref -q HEAD/);
1030                };
1031                if ($new_is_symbolic) {
1032                        print "dcommitted the branch ", $head, "\n";
1033                } else {
1034                        print "dcommitted on a detached HEAD because you gave ",
1035                              "a revision argument.\n",
1036                              "The rewritten commit is: ", $new_head, "\n";
1037                }
1038                command(['checkout', $old_head], STDERR => 0);
1039        }
1040
1041        unlink $gs->{index};
1042}
1043
1044sub cmd_branch {
1045        my ($branch_name, $head) = @_;
1046
1047        unless (defined $branch_name && length $branch_name) {
1048                die(($_tag ? "tag" : "branch") . " name required\n");
1049        }
1050        $head ||= 'HEAD';
1051
1052        my (undef, $rev, undef, $gs) = working_head_info($head);
1053        my $src = $gs->full_pushurl;
1054
1055        my $remote = Git::SVN::read_all_remotes()->{$gs->{repo_id}};
1056        my $allglobs = $remote->{ $_tag ? 'tags' : 'branches' };
1057        my $glob;
1058        if ($#{$allglobs} == 0) {
1059                $glob = $allglobs->[0];
1060        } else {
1061                unless(defined $_branch_dest) {
1062                        die "Multiple ",
1063                            $_tag ? "tag" : "branch",
1064                            " paths defined for Subversion repository.\n",
1065                            "You must specify where you want to create the ",
1066                            $_tag ? "tag" : "branch",
1067                            " with the --destination argument.\n";
1068                }
1069                foreach my $g (@{$allglobs}) {
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        return if verify_ref('HEAD^0');
1604        my $gs = $Git::SVN::_head or return;
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        command_noisy(qw(update-ref HEAD), $gs->refname);
1618        return unless verify_ref('HEAD^0');
1619
1620        return if $ENV{GIT_DIR} !~ m#^(?:.*/)?\.git$#;
1621        my $index = $ENV{GIT_INDEX_FILE} || "$ENV{GIT_DIR}/index";
1622        return if -f $index;
1623
1624        return if command_oneline(qw/rev-parse --is-inside-work-tree/) eq 'false';
1625        return if command_oneline(qw/rev-parse --is-inside-git-dir/) eq 'true';
1626        command_noisy(qw/read-tree -m -u -v HEAD HEAD/);
1627        print STDERR "Checked out HEAD:\n  ",
1628                     $gs->full_url, " r", $gs->last_rev, "\n";
1629        if (auto_create_empty_directories($gs)) {
1630                $gs->mkemptydirs($gs->last_rev);
1631        }
1632}
1633
1634sub complete_svn_url {
1635        my ($url, $path) = @_;
1636        $path =~ s#/+$##;
1637        if ($path !~ m#^[a-z\+]+://#) {
1638                if (!defined $url || $url !~ m#^[a-z\+]+://#) {
1639                        fatal("E: '$path' is not a complete URL ",
1640                              "and a separate URL is not specified");
1641                }
1642                return ($url, $path);
1643        }
1644        return ($path, '');
1645}
1646
1647sub complete_url_ls_init {
1648        my ($ra, $repo_path, $switch, $pfx) = @_;
1649        unless ($repo_path) {
1650                print STDERR "W: $switch not specified\n";
1651                return;
1652        }
1653        $repo_path =~ s#/+$##;
1654        if ($repo_path =~ m#^[a-z\+]+://#) {
1655                $ra = Git::SVN::Ra->new($repo_path);
1656                $repo_path = '';
1657        } else {
1658                $repo_path =~ s#^/+##;
1659                unless ($ra) {
1660                        fatal("E: '$repo_path' is not a complete URL ",
1661                              "and a separate URL is not specified");
1662                }
1663        }
1664        my $url = $ra->{url};
1665        my $gs = Git::SVN->init($url, undef, undef, undef, 1);
1666        my $k = "svn-remote.$gs->{repo_id}.url";
1667        my $orig_url = eval { command_oneline(qw/config --get/, $k) };
1668        if ($orig_url && ($orig_url ne $gs->{url})) {
1669                die "$k already set: $orig_url\n",
1670                    "wanted to set to: $gs->{url}\n";
1671        }
1672        command_oneline('config', $k, $gs->{url}) unless $orig_url;
1673        my $remote_path = "$gs->{path}/$repo_path";
1674        $remote_path =~ s{%([0-9A-F]{2})}{chr hex($1)}ieg;
1675        $remote_path =~ s#/+#/#g;
1676        $remote_path =~ s#^/##g;
1677        $remote_path .= "/*" if $remote_path !~ /\*/;
1678        my ($n) = ($switch =~ /^--(\w+)/);
1679        if (length $pfx && $pfx !~ m#/$#) {
1680                die "--prefix='$pfx' must have a trailing slash '/'\n";
1681        }
1682        command_noisy('config',
1683                      '--add',
1684                      "svn-remote.$gs->{repo_id}.$n",
1685                      "$remote_path:refs/remotes/$pfx*" .
1686                        ('/*' x (($remote_path =~ tr/*/*/) - 1)) );
1687}
1688
1689sub verify_ref {
1690        my ($ref) = @_;
1691        eval { command_oneline([ 'rev-parse', '--verify', $ref ],
1692                               { STDERR => 0 }); };
1693}
1694
1695sub get_tree_from_treeish {
1696        my ($treeish) = @_;
1697        # $treeish can be a symbolic ref, too:
1698        my $type = command_oneline(qw/cat-file -t/, $treeish);
1699        my $expected;
1700        while ($type eq 'tag') {
1701                ($treeish, $type) = command(qw/cat-file tag/, $treeish);
1702        }
1703        if ($type eq 'commit') {
1704                $expected = (grep /^tree /, command(qw/cat-file commit/,
1705                                                    $treeish))[0];
1706                ($expected) = ($expected =~ /^tree ($sha1)$/o);
1707                die "Unable to get tree from $treeish\n" unless $expected;
1708        } elsif ($type eq 'tree') {
1709                $expected = $treeish;
1710        } else {
1711                die "$treeish is a $type, expected tree, tag or commit\n";
1712        }
1713        return $expected;
1714}
1715
1716sub get_commit_entry {
1717        my ($treeish) = shift;
1718        my %log_entry = ( log => '', tree => get_tree_from_treeish($treeish) );
1719        my $commit_editmsg = "$ENV{GIT_DIR}/COMMIT_EDITMSG";
1720        my $commit_msg = "$ENV{GIT_DIR}/COMMIT_MSG";
1721        open my $log_fh, '>', $commit_editmsg or croak $!;
1722
1723        my $type = command_oneline(qw/cat-file -t/, $treeish);
1724        if ($type eq 'commit' || $type eq 'tag') {
1725                my ($msg_fh, $ctx) = command_output_pipe('cat-file',
1726                                                         $type, $treeish);
1727                my $in_msg = 0;
1728                my $author;
1729                my $saw_from = 0;
1730                my $msgbuf = "";
1731                while (<$msg_fh>) {
1732                        if (!$in_msg) {
1733                                $in_msg = 1 if (/^\s*$/);
1734                                $author = $1 if (/^author (.*>)/);
1735                        } elsif (/^git-svn-id: /) {
1736                                # skip this for now, we regenerate the
1737                                # correct one on re-fetch anyways
1738                                # TODO: set *:merge properties or like...
1739                        } else {
1740                                if (/^From:/ || /^Signed-off-by:/) {
1741                                        $saw_from = 1;
1742                                }
1743                                $msgbuf .= $_;
1744                        }
1745                }
1746                $msgbuf =~ s/\s+$//s;
1747                if ($Git::SVN::_add_author_from && defined($author)
1748                    && !$saw_from) {
1749                        $msgbuf .= "\n\nFrom: $author";
1750                }
1751                print $log_fh $msgbuf or croak $!;
1752                command_close_pipe($msg_fh, $ctx);
1753        }
1754        close $log_fh or croak $!;
1755
1756        if ($_edit || ($type eq 'tree')) {
1757                chomp(my $editor = command_oneline(qw(var GIT_EDITOR)));
1758                system('sh', '-c', $editor.' "$@"', $editor, $commit_editmsg);
1759        }
1760        rename $commit_editmsg, $commit_msg or croak $!;
1761        {
1762                require Encode;
1763                # SVN requires messages to be UTF-8 when entering the repo
1764                local $/;
1765                open $log_fh, '<', $commit_msg or croak $!;
1766                binmode $log_fh;
1767                chomp($log_entry{log} = <$log_fh>);
1768
1769                my $enc = Git::config('i18n.commitencoding') || 'UTF-8';
1770                my $msg = $log_entry{log};
1771
1772                eval { $msg = Encode::decode($enc, $msg, 1) };
1773                if ($@) {
1774                        die "Could not decode as $enc:\n", $msg,
1775                            "\nPerhaps you need to set i18n.commitencoding\n";
1776                }
1777
1778                eval { $msg = Encode::encode('UTF-8', $msg, 1) };
1779                die "Could not encode as UTF-8:\n$msg\n" if $@;
1780
1781                $log_entry{log} = $msg;
1782
1783                close $log_fh or croak $!;
1784        }
1785        unlink $commit_msg;
1786        \%log_entry;
1787}
1788
1789sub s_to_file {
1790        my ($str, $file, $mode) = @_;
1791        open my $fd,'>',$file or croak $!;
1792        print $fd $str,"\n" or croak $!;
1793        close $fd or croak $!;
1794        chmod ($mode &~ umask, $file) if (defined $mode);
1795}
1796
1797sub file_to_s {
1798        my $file = shift;
1799        open my $fd,'<',$file or croak "$!: file: $file\n";
1800        local $/;
1801        my $ret = <$fd>;
1802        close $fd or croak $!;
1803        $ret =~ s/\s*$//s;
1804        return $ret;
1805}
1806
1807# '<svn username> = real-name <email address>' mapping based on git-svnimport:
1808sub load_authors {
1809        open my $authors, '<', $_authors or die "Can't open $_authors $!\n";
1810        my $log = $cmd eq 'log';
1811        while (<$authors>) {
1812                chomp;
1813                next unless /^(.+?|\(no author\))\s*=\s*(.+?)\s*<(.+)>\s*$/;
1814                my ($user, $name, $email) = ($1, $2, $3);
1815                if ($log) {
1816                        $Git::SVN::Log::rusers{"$name <$email>"} = $user;
1817                } else {
1818                        $users{$user} = [$name, $email];
1819                }
1820        }
1821        close $authors or croak $!;
1822}
1823
1824# convert GetOpt::Long specs for use by git-config
1825sub read_git_config {
1826        my $opts = shift;
1827        my @config_only;
1828        foreach my $o (keys %$opts) {
1829                # if we have mixedCase and a long option-only, then
1830                # it's a config-only variable that we don't need for
1831                # the command-line.
1832                push @config_only, $o if ($o =~ /[A-Z]/ && $o =~ /^[a-z]+$/i);
1833                my $v = $opts->{$o};
1834                my ($key) = ($o =~ /^([a-zA-Z\-]+)/);
1835                $key =~ s/-//g;
1836                my $arg = 'git config';
1837                $arg .= ' --int' if ($o =~ /[:=]i$/);
1838                $arg .= ' --bool' if ($o !~ /[:=][sfi]$/);
1839                if (ref $v eq 'ARRAY') {
1840                        chomp(my @tmp = `$arg --get-all svn.$key`);
1841                        @$v = @tmp if @tmp;
1842                } else {
1843                        chomp(my $tmp = `$arg --get svn.$key`);
1844                        if ($tmp && !($arg =~ / --bool/ && $tmp eq 'false')) {
1845                                $$v = $tmp;
1846                        }
1847                }
1848        }
1849        delete @$opts{@config_only} if @config_only;
1850}
1851
1852sub extract_metadata {
1853        my $id = shift or return (undef, undef, undef);
1854        my ($url, $rev, $uuid) = ($id =~ /^\s*git-svn-id:\s+(.*)\@(\d+)
1855                                                        \s([a-f\d\-]+)$/ix);
1856        if (!defined $rev || !$uuid || !$url) {
1857                # some of the original repositories I made had
1858                # identifiers like this:
1859                ($rev, $uuid) = ($id =~/^\s*git-svn-id:\s(\d+)\@([a-f\d\-]+)/i);
1860        }
1861        return ($url, $rev, $uuid);
1862}
1863
1864sub cmt_metadata {
1865        return extract_metadata((grep(/^git-svn-id: /,
1866                command(qw/cat-file commit/, shift)))[-1]);
1867}
1868
1869sub cmt_sha2rev_batch {
1870        my %s2r;
1871        my ($pid, $in, $out, $ctx) = command_bidi_pipe(qw/cat-file --batch/);
1872        my $list = shift;
1873
1874        foreach my $sha (@{$list}) {
1875                my $first = 1;
1876                my $size = 0;
1877                print $out $sha, "\n";
1878
1879                while (my $line = <$in>) {
1880                        if ($first && $line =~ /^[[:xdigit:]]{40}\smissing$/) {
1881                                last;
1882                        } elsif ($first &&
1883                               $line =~ /^[[:xdigit:]]{40}\scommit\s(\d+)$/) {
1884                                $first = 0;
1885                                $size = $1;
1886                                next;
1887                        } elsif ($line =~ /^(git-svn-id: )/) {
1888                                my (undef, $rev, undef) =
1889                                                      extract_metadata($line);
1890                                $s2r{$sha} = $rev;
1891                        }
1892
1893                        $size -= length($line);
1894                        last if ($size == 0);
1895                }
1896        }
1897
1898        command_close_bidi_pipe($pid, $in, $out, $ctx);
1899
1900        return \%s2r;
1901}
1902
1903sub working_head_info {
1904        my ($head, $refs) = @_;
1905        my @args = qw/rev-list --first-parent --pretty=medium/;
1906        my ($fh, $ctx) = command_output_pipe(@args, $head);
1907        my $hash;
1908        my %max;
1909        while (<$fh>) {
1910                if ( m{^commit ($::sha1)$} ) {
1911                        unshift @$refs, $hash if $hash and $refs;
1912                        $hash = $1;
1913                        next;
1914                }
1915                next unless s{^\s*(git-svn-id:)}{$1};
1916                my ($url, $rev, $uuid) = extract_metadata($_);
1917                if (defined $url && defined $rev) {
1918                        next if $max{$url} and $max{$url} < $rev;
1919                        if (my $gs = Git::SVN->find_by_url($url)) {
1920                                my $c = $gs->rev_map_get($rev, $uuid);
1921                                if ($c && $c eq $hash) {
1922                                        close $fh; # break the pipe
1923                                        return ($url, $rev, $uuid, $gs);
1924                                } else {
1925                                        $max{$url} ||= $gs->rev_map_max;
1926                                }
1927                        }
1928                }
1929        }
1930        command_close_pipe($fh, $ctx);
1931        (undef, undef, undef, undef);
1932}
1933
1934sub read_commit_parents {
1935        my ($parents, $c) = @_;
1936        chomp(my $p = command_oneline(qw/rev-list --parents -1/, $c));
1937        $p =~ s/^($c)\s*// or die "rev-list --parents -1 $c failed!\n";
1938        @{$parents->{$c}} = split(/ /, $p);
1939}
1940
1941sub linearize_history {
1942        my ($gs, $refs) = @_;
1943        my %parents;
1944        foreach my $c (@$refs) {
1945                read_commit_parents(\%parents, $c);
1946        }
1947
1948        my @linear_refs;
1949        my %skip = ();
1950        my $last_svn_commit = $gs->last_commit;
1951        foreach my $c (reverse @$refs) {
1952                next if $c eq $last_svn_commit;
1953                last if $skip{$c};
1954
1955                unshift @linear_refs, $c;
1956                $skip{$c} = 1;
1957
1958                # we only want the first parent to diff against for linear
1959                # history, we save the rest to inject when we finalize the
1960                # svn commit
1961                my $fp_a = verify_ref("$c~1");
1962                my $fp_b = shift @{$parents{$c}} if $parents{$c};
1963                if (!$fp_a || !$fp_b) {
1964                        die "Commit $c\n",
1965                            "has no parent commit, and therefore ",
1966                            "nothing to diff against.\n",
1967                            "You should be working from a repository ",
1968                            "originally created by git-svn\n";
1969                }
1970                if ($fp_a ne $fp_b) {
1971                        die "$c~1 = $fp_a, however parsing commit $c ",
1972                            "revealed that:\n$c~1 = $fp_b\nBUG!\n";
1973                }
1974
1975                foreach my $p (@{$parents{$c}}) {
1976                        $skip{$p} = 1;
1977                }
1978        }
1979        (\@linear_refs, \%parents);
1980}
1981
1982sub find_file_type_and_diff_status {
1983        my ($path) = @_;
1984        return ('dir', '') if $path eq '';
1985
1986        my $diff_output =
1987            command_oneline(qw(diff --cached --name-status --), $path) || "";
1988        my $diff_status = (split(' ', $diff_output))[0] || "";
1989
1990        my $ls_tree = command_oneline(qw(ls-tree HEAD), $path) || "";
1991
1992        return (undef, undef) if !$diff_status && !$ls_tree;
1993
1994        if ($diff_status eq "A") {
1995                return ("link", $diff_status) if -l $path;
1996                return ("dir", $diff_status) if -d $path;
1997                return ("file", $diff_status);
1998        }
1999
2000        my $mode = (split(' ', $ls_tree))[0] || "";
2001
2002        return ("link", $diff_status) if $mode eq "120000";
2003        return ("dir", $diff_status) if $mode eq "040000";
2004        return ("file", $diff_status);
2005}
2006
2007sub md5sum {
2008        my $arg = shift;
2009        my $ref = ref $arg;
2010        my $md5 = Digest::MD5->new();
2011        if ($ref eq 'GLOB' || $ref eq 'IO::File' || $ref eq 'File::Temp') {
2012                $md5->addfile($arg) or croak $!;
2013        } elsif ($ref eq 'SCALAR') {
2014                $md5->add($$arg) or croak $!;
2015        } elsif (!$ref) {
2016                $md5->add($arg) or croak $!;
2017        } else {
2018                fatal "Can't provide MD5 hash for unknown ref type: '", $ref, "'";
2019        }
2020        return $md5->hexdigest();
2021}
2022
2023sub gc_directory {
2024        if (can_compress() && -f $_ && basename($_) eq "unhandled.log") {
2025                my $out_filename = $_ . ".gz";
2026                open my $in_fh, "<", $_ or die "Unable to open $_: $!\n";
2027                binmode $in_fh;
2028                my $gz = Compress::Zlib::gzopen($out_filename, "ab") or
2029                                die "Unable to open $out_filename: $!\n";
2030
2031                my $res;
2032                while ($res = sysread($in_fh, my $str, 1024)) {
2033                        $gz->gzwrite($str) or
2034                                die "Unable to write: ".$gz->gzerror()."!\n";
2035                }
2036                unlink $_ or die "unlink $File::Find::name: $!\n";
2037        } elsif (-f $_ && basename($_) eq "index") {
2038                unlink $_ or die "unlink $_: $!\n";
2039        }
2040}
2041
2042__END__
2043
2044Data structures:
2045
2046
2047$remotes = { # returned by read_all_remotes()
2048        'svn' => {
2049                # svn-remote.svn.url=https://svn.musicpd.org
2050                url => 'https://svn.musicpd.org',
2051                # svn-remote.svn.fetch=mpd/trunk:trunk
2052                fetch => {
2053                        'mpd/trunk' => 'trunk',
2054                },
2055                # svn-remote.svn.tags=mpd/tags/*:tags/*
2056                tags => {
2057                        path => {
2058                                left => 'mpd/tags',
2059                                right => '',
2060                                regex => qr!mpd/tags/([^/]+)$!,
2061                                glob => 'tags/*',
2062                        },
2063                        ref => {
2064                                left => 'tags',
2065                                right => '',
2066                                regex => qr!tags/([^/]+)$!,
2067                                glob => 'tags/*',
2068                        },
2069                }
2070        }
2071};
2072
2073$log_entry hashref as returned by libsvn_log_entry()
2074{
2075        log => 'whitespace-formatted log entry
2076',                                              # trailing newline is preserved
2077        revision => '8',                        # integer
2078        date => '2004-02-24T17:01:44.108345Z',  # commit date
2079        author => 'committer name'
2080};
2081
2082
2083# this is generated by generate_diff();
2084@mods = array of diff-index line hashes, each element represents one line
2085        of diff-index output
2086
2087diff-index line ($m hash)
2088{
2089        mode_a => first column of diff-index output, no leading ':',
2090        mode_b => second column of diff-index output,
2091        sha1_b => sha1sum of the final blob,
2092        chg => change type [MCRADT],
2093        file_a => original file name of a file (iff chg is 'C' or 'R')
2094        file_b => new/current file name of a file (any chg)
2095}
2096;
2097
2098# retval of read_url_paths{,_all}();
2099$l_map = {
2100        # repository root url
2101        'https://svn.musicpd.org' => {
2102                # repository path               # GIT_SVN_ID
2103                'mpd/trunk'             =>      'trunk',
2104                'mpd/tags/0.11.5'       =>      'tags/0.11.5',
2105        },
2106}
2107
2108Notes:
2109        I don't trust the each() function on unless I created %hash myself
2110        because the internal iterator may not have started at base.