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(
  33        fatal
  34        can_compress
  35        canonicalize_path
  36        canonicalize_url
  37        join_paths
  38        add_path_to_url
  39        join_paths
  40);
  41
  42use Git qw(
  43        git_cmd_try
  44        command
  45        command_oneline
  46        command_noisy
  47        command_output_pipe
  48        command_close_pipe
  49        command_bidi_pipe
  50        command_close_bidi_pipe
  51);
  52
  53BEGIN {
  54        Memoize::memoize 'Git::config';
  55        Memoize::memoize 'Git::config_bool';
  56}
  57
  58
  59# From which subdir have we been invoked?
  60my $cmd_dir_prefix = eval {
  61        command_oneline([qw/rev-parse --show-prefix/], STDERR => 0)
  62} || '';
  63
  64$Git::SVN::Ra::_log_window_size = 100;
  65
  66if (! exists $ENV{SVN_SSH} && exists $ENV{GIT_SSH}) {
  67        $ENV{SVN_SSH} = $ENV{GIT_SSH};
  68}
  69
  70if (exists $ENV{SVN_SSH} && $^O eq 'msys') {
  71        $ENV{SVN_SSH} =~ s/\\/\\\\/g;
  72        $ENV{SVN_SSH} =~ s/(.*)/"$1"/;
  73}
  74
  75$Git::SVN::Log::TZ = $ENV{TZ};
  76$ENV{TZ} = 'UTC';
  77$| = 1; # unbuffer STDOUT
  78
  79# All SVN commands do it.  Otherwise we may die on SIGPIPE when the remote
  80# repository decides to close the connection which we expect to be kept alive.
  81$SIG{PIPE} = 'IGNORE';
  82
  83# Given a dot separated version number, "subtract" it from
  84# the SVN::Core::VERSION; non-negaitive return means the SVN::Core
  85# is at least at the version the caller asked for.
  86sub compare_svn_version {
  87        my (@ours) = split(/\./, $SVN::Core::VERSION);
  88        my (@theirs) = split(/\./, $_[0]);
  89        my ($i, $diff);
  90
  91        for ($i = 0; $i < @ours && $i < @theirs; $i++) {
  92                $diff = $ours[$i] - $theirs[$i];
  93                return $diff if ($diff);
  94        }
  95        return 1 if ($i < @ours);
  96        return -1 if ($i < @theirs);
  97        return 0;
  98}
  99
 100sub _req_svn {
 101        require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
 102        require SVN::Ra;
 103        require SVN::Delta;
 104        if (::compare_svn_version('1.1.0') < 0) {
 105                fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
 106        }
 107}
 108
 109$sha1 = qr/[a-f\d]{40}/;
 110$sha1_short = qr/[a-f\d]{4,40}/;
 111my ($_stdin, $_help, $_edit,
 112        $_message, $_file, $_branch_dest,
 113        $_template, $_shared,
 114        $_version, $_fetch_all, $_no_rebase, $_fetch_parent,
 115        $_before, $_after,
 116        $_merge, $_strategy, $_preserve_merges, $_dry_run, $_local,
 117        $_prefix, $_no_checkout, $_url, $_verbose,
 118        $_commit_url, $_tag, $_merge_info, $_interactive);
 119
 120# This is a refactoring artifact so Git::SVN can get at this git-svn switch.
 121sub opt_prefix { return $_prefix || '' }
 122
 123$Git::SVN::Fetcher::_placeholder_filename = ".gitignore";
 124$_q ||= 0;
 125my %remote_opts = ( 'username=s' => \$Git::SVN::Prompt::_username,
 126                    'config-dir=s' => \$Git::SVN::Ra::config_dir,
 127                    'no-auth-cache' => \$Git::SVN::Prompt::_no_auth_cache,
 128                    'ignore-paths=s' => \$Git::SVN::Fetcher::_ignore_regex,
 129                    'ignore-refs=s' => \$Git::SVN::Ra::_ignore_refs_regex );
 130my %fc_opts = ( 'follow-parent|follow!' => \$Git::SVN::_follow_parent,
 131                'authors-file|A=s' => \$_authors,
 132                'authors-prog=s' => \$_authors_prog,
 133                'repack:i' => \$Git::SVN::_repack,
 134                'noMetadata' => \$Git::SVN::_no_metadata,
 135                'useSvmProps' => \$Git::SVN::_use_svm_props,
 136                'useSvnsyncProps' => \$Git::SVN::_use_svnsync_props,
 137                'log-window-size=i' => \$Git::SVN::Ra::_log_window_size,
 138                'no-checkout' => \$_no_checkout,
 139                'quiet|q+' => \$_q,
 140                'repack-flags|repack-args|repack-opts=s' =>
 141                   \$Git::SVN::_repack_flags,
 142                'use-log-author' => \$Git::SVN::_use_log_author,
 143                'add-author-from' => \$Git::SVN::_add_author_from,
 144                'localtime' => \$Git::SVN::_localtime,
 145                %remote_opts );
 146
 147my ($_trunk, @_tags, @_branches, $_stdlayout);
 148my %icv;
 149my %init_opts = ( 'template=s' => \$_template, 'shared:s' => \$_shared,
 150                  'trunk|T=s' => \$_trunk, 'tags|t=s@' => \@_tags,
 151                  'branches|b=s@' => \@_branches, 'prefix=s' => \$_prefix,
 152                  'stdlayout|s' => \$_stdlayout,
 153                  'minimize-url|m!' => \$Git::SVN::_minimize_url,
 154                  'no-metadata' => sub { $icv{noMetadata} = 1 },
 155                  'use-svm-props' => sub { $icv{useSvmProps} = 1 },
 156                  'use-svnsync-props' => sub { $icv{useSvnsyncProps} = 1 },
 157                  'rewrite-root=s' => sub { $icv{rewriteRoot} = $_[1] },
 158                  'rewrite-uuid=s' => sub { $icv{rewriteUUID} = $_[1] },
 159                  %remote_opts );
 160my %cmt_opts = ( 'edit|e' => \$_edit,
 161                'rmdir' => \$Git::SVN::Editor::_rmdir,
 162                'find-copies-harder' => \$Git::SVN::Editor::_find_copies_harder,
 163                'l=i' => \$Git::SVN::Editor::_rename_limit,
 164                'copy-similarity|C=i'=> \$Git::SVN::Editor::_cp_similarity
 165);
 166
 167my %cmd = (
 168        fetch => [ \&cmd_fetch, "Download new revisions from SVN",
 169                        { 'revision|r=s' => \$_revision,
 170                          'fetch-all|all' => \$_fetch_all,
 171                          'parent|p' => \$_fetch_parent,
 172                           %fc_opts } ],
 173        clone => [ \&cmd_clone, "Initialize and fetch revisions",
 174                        { 'revision|r=s' => \$_revision,
 175                          'preserve-empty-dirs' =>
 176                                \$Git::SVN::Fetcher::_preserve_empty_dirs,
 177                          'placeholder-filename=s' =>
 178                                \$Git::SVN::Fetcher::_placeholder_filename,
 179                           %fc_opts, %init_opts } ],
 180        init => [ \&cmd_init, "Initialize a repo for tracking" .
 181                          " (requires URL argument)",
 182                          \%init_opts ],
 183        'multi-init' => [ \&cmd_multi_init,
 184                          "Deprecated alias for ".
 185                          "'$0 init -T<trunk> -b<branches> -t<tags>'",
 186                          \%init_opts ],
 187        dcommit => [ \&cmd_dcommit,
 188                     'Commit several diffs to merge with upstream',
 189                        { 'merge|m|M' => \$_merge,
 190                          'strategy|s=s' => \$_strategy,
 191                          'verbose|v' => \$_verbose,
 192                          'dry-run|n' => \$_dry_run,
 193                          'fetch-all|all' => \$_fetch_all,
 194                          'commit-url=s' => \$_commit_url,
 195                          'revision|r=i' => \$_revision,
 196                          'no-rebase' => \$_no_rebase,
 197                          'mergeinfo=s' => \$_merge_info,
 198                          'interactive|i' => \$_interactive,
 199                        %cmt_opts, %fc_opts } ],
 200        branch => [ \&cmd_branch,
 201                    'Create a branch in the SVN repository',
 202                    { 'message|m=s' => \$_message,
 203                      'destination|d=s' => \$_branch_dest,
 204                      'dry-run|n' => \$_dry_run,
 205                      'tag|t' => \$_tag,
 206                      'username=s' => \$Git::SVN::Prompt::_username,
 207                      'commit-url=s' => \$_commit_url } ],
 208        tag => [ sub { $_tag = 1; cmd_branch(@_) },
 209                 'Create a tag in the SVN repository',
 210                 { 'message|m=s' => \$_message,
 211                   'destination|d=s' => \$_branch_dest,
 212                   'dry-run|n' => \$_dry_run,
 213                   'username=s' => \$Git::SVN::Prompt::_username,
 214                   'commit-url=s' => \$_commit_url } ],
 215        'set-tree' => [ \&cmd_set_tree,
 216                        "Set an SVN repository to a git tree-ish",
 217                        { 'stdin' => \$_stdin, %cmt_opts, %fc_opts, } ],
 218        'create-ignore' => [ \&cmd_create_ignore,
 219                             'Create a .gitignore per svn:ignore',
 220                             { 'revision|r=i' => \$_revision
 221                             } ],
 222        'mkdirs' => [ \&cmd_mkdirs ,
 223                      "recreate empty directories after a checkout",
 224                      { 'revision|r=i' => \$_revision } ],
 225        'propget' => [ \&cmd_propget,
 226                       'Print the value of a property on a file or directory',
 227                       { 'revision|r=i' => \$_revision } ],
 228        'proplist' => [ \&cmd_proplist,
 229                       'List all properties of a file or directory',
 230                       { 'revision|r=i' => \$_revision } ],
 231        'show-ignore' => [ \&cmd_show_ignore, "Show svn:ignore listings",
 232                        { 'revision|r=i' => \$_revision
 233                        } ],
 234        'show-externals' => [ \&cmd_show_externals, "Show svn:externals listings",
 235                        { 'revision|r=i' => \$_revision
 236                        } ],
 237        'multi-fetch' => [ \&cmd_multi_fetch,
 238                           "Deprecated alias for $0 fetch --all",
 239                           { 'revision|r=s' => \$_revision, %fc_opts } ],
 240        'migrate' => [ sub { },
 241                       # no-op, we automatically run this anyways,
 242                       'Migrate configuration/metadata/layout from
 243                        previous versions of git-svn',
 244                       { 'minimize' => \$Git::SVN::Migration::_minimize,
 245                         %remote_opts } ],
 246        'log' => [ \&Git::SVN::Log::cmd_show_log, 'Show commit logs',
 247                        { 'limit=i' => \$Git::SVN::Log::limit,
 248                          'revision|r=s' => \$_revision,
 249                          'verbose|v' => \$Git::SVN::Log::verbose,
 250                          'incremental' => \$Git::SVN::Log::incremental,
 251                          'oneline' => \$Git::SVN::Log::oneline,
 252                          'show-commit' => \$Git::SVN::Log::show_commit,
 253                          'non-recursive' => \$Git::SVN::Log::non_recursive,
 254                          'authors-file|A=s' => \$_authors,
 255                          'color' => \$Git::SVN::Log::color,
 256                          'pager=s' => \$Git::SVN::Log::pager
 257                        } ],
 258        'find-rev' => [ \&cmd_find_rev,
 259                        "Translate between SVN revision numbers and tree-ish",
 260                        { 'before' => \$_before,
 261                          'after' => \$_after } ],
 262        'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
 263                        { 'merge|m|M' => \$_merge,
 264                          'verbose|v' => \$_verbose,
 265                          'strategy|s=s' => \$_strategy,
 266                          'local|l' => \$_local,
 267                          'fetch-all|all' => \$_fetch_all,
 268                          'dry-run|n' => \$_dry_run,
 269                          'preserve-merges|p' => \$_preserve_merges,
 270                          %fc_opts } ],
 271        'commit-diff' => [ \&cmd_commit_diff,
 272                           'Commit a diff between two trees',
 273                        { 'message|m=s' => \$_message,
 274                          'file|F=s' => \$_file,
 275                          'revision|r=s' => \$_revision,
 276                        %cmt_opts } ],
 277        'info' => [ \&cmd_info,
 278                    "Show info about the latest SVN revision
 279                     on the current branch",
 280                    { 'url' => \$_url, } ],
 281        'blame' => [ \&Git::SVN::Log::cmd_blame,
 282                    "Show what revision and author last modified each line of a file",
 283                    { 'git-format' => \$Git::SVN::Log::_git_format } ],
 284        'reset' => [ \&cmd_reset,
 285                     "Undo fetches back to the specified SVN revision",
 286                     { 'revision|r=s' => \$_revision,
 287                       'parent|p' => \$_fetch_parent } ],
 288        'gc' => [ \&cmd_gc,
 289                  "Compress unhandled.log files in .git/svn and remove " .
 290                  "index files in .git/svn",
 291                {} ],
 292);
 293
 294use Term::ReadLine;
 295package FakeTerm;
 296sub new {
 297        my ($class, $reason) = @_;
 298        return bless \$reason, shift;
 299}
 300sub readline {
 301        my $self = shift;
 302        die "Cannot use readline on FakeTerm: $$self";
 303}
 304package main;
 305
 306my $term = eval {
 307        $ENV{"GIT_SVN_NOTTY"}
 308                ? new Term::ReadLine 'git-svn', \*STDIN, \*STDOUT
 309                : new Term::ReadLine 'git-svn';
 310};
 311if ($@) {
 312        $term = new FakeTerm "$@: going non-interactive";
 313}
 314
 315my $cmd;
 316for (my $i = 0; $i < @ARGV; $i++) {
 317        if (defined $cmd{$ARGV[$i]}) {
 318                $cmd = $ARGV[$i];
 319                splice @ARGV, $i, 1;
 320                last;
 321        } elsif ($ARGV[$i] eq 'help') {
 322                $cmd = $ARGV[$i+1];
 323                usage(0);
 324        }
 325};
 326
 327# make sure we're always running at the top-level working directory
 328if ($cmd && $cmd =~ /(?:clone|init|multi-init)$/) {
 329        $ENV{GIT_DIR} ||= ".git";
 330} else {
 331        my ($git_dir, $cdup);
 332        git_cmd_try {
 333                $git_dir = command_oneline([qw/rev-parse --git-dir/]);
 334        } "Unable to find .git directory\n";
 335        git_cmd_try {
 336                $cdup = command_oneline(qw/rev-parse --show-cdup/);
 337                chomp $cdup if ($cdup);
 338                $cdup = "." unless ($cdup && length $cdup);
 339        } "Already at toplevel, but $git_dir not found\n";
 340        $ENV{GIT_DIR} = $git_dir;
 341        chdir $cdup or die "Unable to chdir up to '$cdup'\n";
 342        $_repository = Git->repository(Repository => $ENV{GIT_DIR});
 343}
 344
 345my %opts = %{$cmd{$cmd}->[2]} if (defined $cmd);
 346
 347read_git_config(\%opts);
 348if ($cmd && ($cmd eq 'log' || $cmd eq 'blame')) {
 349        Getopt::Long::Configure('pass_through');
 350}
 351my $rv = GetOptions(%opts, 'h|H' => \$_help, 'version|V' => \$_version,
 352                    'minimize-connections' => \$Git::SVN::Migration::_minimize,
 353                    'id|i=s' => \$Git::SVN::default_ref_id,
 354                    'svn-remote|remote|R=s' => sub {
 355                       $Git::SVN::no_reuse_existing = 1;
 356                       $Git::SVN::default_repo_id = $_[1] });
 357exit 1 if (!$rv && $cmd && $cmd ne 'log');
 358
 359usage(0) if $_help;
 360version() if $_version;
 361usage(1) unless defined $cmd;
 362load_authors() if $_authors;
 363if (defined $_authors_prog) {
 364        $_authors_prog = "'" . File::Spec->rel2abs($_authors_prog) . "'";
 365}
 366
 367unless ($cmd =~ /^(?:clone|init|multi-init|commit-diff)$/) {
 368        Git::SVN::Migration::migration_check();
 369}
 370Git::SVN::init_vars();
 371eval {
 372        Git::SVN::verify_remotes_sanity();
 373        $cmd{$cmd}->[0]->(@ARGV);
 374        post_fetch_checkout();
 375};
 376fatal $@ if $@;
 377exit 0;
 378
 379####################### primary functions ######################
 380sub usage {
 381        my $exit = shift || 0;
 382        my $fd = $exit ? \*STDERR : \*STDOUT;
 383        print $fd <<"";
 384git-svn - bidirectional operations between a single Subversion tree and git
 385Usage: git svn <command> [options] [arguments]\n
 386
 387        print $fd "Available commands:\n" unless $cmd;
 388
 389        foreach (sort keys %cmd) {
 390                next if $cmd && $cmd ne $_;
 391                next if /^multi-/; # don't show deprecated commands
 392                print $fd '  ',pack('A17',$_),$cmd{$_}->[1],"\n";
 393                foreach (sort keys %{$cmd{$_}->[2]}) {
 394                        # mixed-case options are for .git/config only
 395                        next if /[A-Z]/ && /^[a-z]+$/i;
 396                        # prints out arguments as they should be passed:
 397                        my $x = s#[:=]s$## ? '<arg>' : s#[:=]i$## ? '<num>' : '';
 398                        print $fd ' ' x 21, join(', ', map { length $_ > 1 ?
 399                                                        "--$_" : "-$_" }
 400                                                split /\|/,$_)," $x\n";
 401                }
 402        }
 403        print $fd <<"";
 404\nGIT_SVN_ID may be set in the environment or via the --id/-i switch to an
 405arbitrary identifier if you're tracking multiple SVN branches/repositories in
 406one git repository and want to keep them separate.  See git-svn(1) for more
 407information.
 408
 409        exit $exit;
 410}
 411
 412sub version {
 413        ::_req_svn();
 414        print "git-svn version $VERSION (svn $SVN::Core::VERSION)\n";
 415        exit 0;
 416}
 417
 418sub ask {
 419        my ($prompt, %arg) = @_;
 420        my $valid_re = $arg{valid_re};
 421        my $default = $arg{default};
 422        my $resp;
 423        my $i = 0;
 424
 425        if ( !( defined($term->IN)
 426            && defined( fileno($term->IN) )
 427            && defined( $term->OUT )
 428            && defined( fileno($term->OUT) ) ) ){
 429                return defined($default) ? $default : undef;
 430        }
 431
 432        while ($i++ < 10) {
 433                $resp = $term->readline($prompt);
 434                if (!defined $resp) { # EOF
 435                        print "\n";
 436                        return defined $default ? $default : undef;
 437                }
 438                if ($resp eq '' and defined $default) {
 439                        return $default;
 440                }
 441                if (!defined $valid_re or $resp =~ /$valid_re/) {
 442                        return $resp;
 443                }
 444        }
 445        return undef;
 446}
 447
 448sub do_git_init_db {
 449        unless (-d $ENV{GIT_DIR}) {
 450                my @init_db = ('init');
 451                push @init_db, "--template=$_template" if defined $_template;
 452                if (defined $_shared) {
 453                        if ($_shared =~ /[a-z]/) {
 454                                push @init_db, "--shared=$_shared";
 455                        } else {
 456                                push @init_db, "--shared";
 457                        }
 458                }
 459                command_noisy(@init_db);
 460                $_repository = Git->repository(Repository => ".git");
 461        }
 462        my $set;
 463        my $pfx = "svn-remote.$Git::SVN::default_repo_id";
 464        foreach my $i (keys %icv) {
 465                die "'$set' and '$i' cannot both be set\n" if $set;
 466                next unless defined $icv{$i};
 467                command_noisy('config', "$pfx.$i", $icv{$i});
 468                $set = $i;
 469        }
 470        my $ignore_paths_regex = \$Git::SVN::Fetcher::_ignore_regex;
 471        command_noisy('config', "$pfx.ignore-paths", $$ignore_paths_regex)
 472                if defined $$ignore_paths_regex;
 473        my $ignore_refs_regex = \$Git::SVN::Ra::_ignore_refs_regex;
 474        command_noisy('config', "$pfx.ignore-refs", $$ignore_refs_regex)
 475                if defined $$ignore_refs_regex;
 476
 477        if (defined $Git::SVN::Fetcher::_preserve_empty_dirs) {
 478                my $fname = \$Git::SVN::Fetcher::_placeholder_filename;
 479                command_noisy('config', "$pfx.preserve-empty-dirs", 'true');
 480                command_noisy('config', "$pfx.placeholder-filename", $$fname);
 481        }
 482}
 483
 484sub init_subdir {
 485        my $repo_path = shift or return;
 486        mkpath([$repo_path]) unless -d $repo_path;
 487        chdir $repo_path or die "Couldn't chdir to $repo_path: $!\n";
 488        $ENV{GIT_DIR} = '.git';
 489        $_repository = Git->repository(Repository => $ENV{GIT_DIR});
 490}
 491
 492sub cmd_clone {
 493        my ($url, $path) = @_;
 494        if (!defined $path &&
 495            (defined $_trunk || @_branches || @_tags ||
 496             defined $_stdlayout) &&
 497            $url !~ m#^[a-z\+]+://#) {
 498                $path = $url;
 499        }
 500        $path = basename($url) if !defined $path || !length $path;
 501        my $authors_absolute = $_authors ? File::Spec->rel2abs($_authors) : "";
 502        cmd_init($url, $path);
 503        command_oneline('config', 'svn.authorsfile', $authors_absolute)
 504            if $_authors;
 505        Git::SVN::fetch_all($Git::SVN::default_repo_id);
 506}
 507
 508sub cmd_init {
 509        if (defined $_stdlayout) {
 510                $_trunk = 'trunk' if (!defined $_trunk);
 511                @_tags = 'tags' if (! @_tags);
 512                @_branches = 'branches' if (! @_branches);
 513        }
 514        if (defined $_trunk || @_branches || @_tags) {
 515                return cmd_multi_init(@_);
 516        }
 517        my $url = shift or die "SVN repository location required ",
 518                               "as a command-line argument\n";
 519        $url = canonicalize_url($url);
 520        init_subdir(@_);
 521        do_git_init_db();
 522
 523        if ($Git::SVN::_minimize_url eq 'unset') {
 524                $Git::SVN::_minimize_url = 0;
 525        }
 526
 527        Git::SVN->init($url);
 528}
 529
 530sub cmd_fetch {
 531        if (grep /^\d+=./, @_) {
 532                die "'<rev>=<commit>' fetch arguments are ",
 533                    "no longer supported.\n";
 534        }
 535        my ($remote) = @_;
 536        if (@_ > 1) {
 537                die "Usage: $0 fetch [--all] [--parent] [svn-remote]\n";
 538        }
 539        $Git::SVN::no_reuse_existing = undef;
 540        if ($_fetch_parent) {
 541                my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
 542                unless ($gs) {
 543                        die "Unable to determine upstream SVN information from ",
 544                            "working tree history\n";
 545                }
 546                # just fetch, don't checkout.
 547                $_no_checkout = 'true';
 548                $_fetch_all ? $gs->fetch_all : $gs->fetch;
 549        } elsif ($_fetch_all) {
 550                cmd_multi_fetch();
 551        } else {
 552                $remote ||= $Git::SVN::default_repo_id;
 553                Git::SVN::fetch_all($remote, Git::SVN::read_all_remotes());
 554        }
 555}
 556
 557sub cmd_set_tree {
 558        my (@commits) = @_;
 559        if ($_stdin || !@commits) {
 560                print "Reading from stdin...\n";
 561                @commits = ();
 562                while (<STDIN>) {
 563                        if (/\b($sha1_short)\b/o) {
 564                                unshift @commits, $1;
 565                        }
 566                }
 567        }
 568        my @revs;
 569        foreach my $c (@commits) {
 570                my @tmp = command('rev-parse',$c);
 571                if (scalar @tmp == 1) {
 572                        push @revs, $tmp[0];
 573                } elsif (scalar @tmp > 1) {
 574                        push @revs, reverse(command('rev-list',@tmp));
 575                } else {
 576                        fatal "Failed to rev-parse $c";
 577                }
 578        }
 579        my $gs = Git::SVN->new;
 580        my ($r_last, $cmt_last) = $gs->last_rev_commit;
 581        $gs->fetch;
 582        if (defined $gs->{last_rev} && $r_last != $gs->{last_rev}) {
 583                fatal "There are new revisions that were fetched ",
 584                      "and need to be merged (or acknowledged) ",
 585                      "before committing.\nlast rev: $r_last\n",
 586                      " current: $gs->{last_rev}";
 587        }
 588        $gs->set_tree($_) foreach @revs;
 589        print "Done committing ",scalar @revs," revisions to SVN\n";
 590        unlink $gs->{index};
 591}
 592
 593sub split_merge_info_range {
 594        my ($range) = @_;
 595        if ($range =~ /(\d+)-(\d+)/) {
 596                return (int($1), int($2));
 597        } else {
 598                return (int($range), int($range));
 599        }
 600}
 601
 602sub combine_ranges {
 603        my ($in) = @_;
 604
 605        my @fnums = ();
 606        my @arr = split(/,/, $in);
 607        for my $element (@arr) {
 608                my ($start, $end) = split_merge_info_range($element);
 609                push @fnums, $start;
 610        }
 611
 612        my @sorted = @arr [ sort {
 613                $fnums[$a] <=> $fnums[$b]
 614        } 0..$#arr ];
 615
 616        my @return = ();
 617        my $last = -1;
 618        my $first = -1;
 619        for my $element (@sorted) {
 620                my ($start, $end) = split_merge_info_range($element);
 621
 622                if ($last == -1) {
 623                        $first = $start;
 624                        $last = $end;
 625                        next;
 626                }
 627                if ($start <= $last+1) {
 628                        if ($end > $last) {
 629                                $last = $end;
 630                        }
 631                        next;
 632                }
 633                if ($first == $last) {
 634                        push @return, "$first";
 635                } else {
 636                        push @return, "$first-$last";
 637                }
 638                $first = $start;
 639                $last = $end;
 640        }
 641
 642        if ($first != -1) {
 643                if ($first == $last) {
 644                        push @return, "$first";
 645                } else {
 646                        push @return, "$first-$last";
 647                }
 648        }
 649
 650        return join(',', @return);
 651}
 652
 653sub merge_revs_into_hash {
 654        my ($hash, $minfo) = @_;
 655        my @lines = split(' ', $minfo);
 656
 657        for my $line (@lines) {
 658                my ($branchpath, $revs) = split(/:/, $line);
 659
 660                if (exists($hash->{$branchpath})) {
 661                        # Merge the two revision sets
 662                        my $combined = "$hash->{$branchpath},$revs";
 663                        $hash->{$branchpath} = combine_ranges($combined);
 664                } else {
 665                        # Just do range combining for consolidation
 666                        $hash->{$branchpath} = combine_ranges($revs);
 667                }
 668        }
 669}
 670
 671sub merge_merge_info {
 672        my ($mergeinfo_one, $mergeinfo_two) = @_;
 673        my %result_hash = ();
 674
 675        merge_revs_into_hash(\%result_hash, $mergeinfo_one);
 676        merge_revs_into_hash(\%result_hash, $mergeinfo_two);
 677
 678        my $result = '';
 679        # Sort below is for consistency's sake
 680        for my $branchname (sort keys(%result_hash)) {
 681                my $revlist = $result_hash{$branchname};
 682                $result .= "$branchname:$revlist\n"
 683        }
 684        return $result;
 685}
 686
 687sub populate_merge_info {
 688        my ($d, $gs, $uuid, $linear_refs, $rewritten_parent) = @_;
 689
 690        my %parentshash;
 691        read_commit_parents(\%parentshash, $d);
 692        my @parents = @{$parentshash{$d}};
 693        if ($#parents > 0) {
 694                # Merge commit
 695                my $all_parents_ok = 1;
 696                my $aggregate_mergeinfo = '';
 697                my $rooturl = $gs->repos_root;
 698
 699                if (defined($rewritten_parent)) {
 700                        # Replace first parent with newly-rewritten version
 701                        shift @parents;
 702                        unshift @parents, $rewritten_parent;
 703                }
 704
 705                foreach my $parent (@parents) {
 706                        my ($branchurl, $svnrev, $paruuid) =
 707                                cmt_metadata($parent);
 708
 709                        unless (defined($svnrev)) {
 710                                # Should have been caught be preflight check
 711                                fatal "merge commit $d has ancestor $parent, but that change "
 712                     ."does not have git-svn metadata!";
 713                        }
 714                        unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
 715                                fatal "commit $parent git-svn metadata changed mid-run!";
 716                        }
 717                        my $branchpath = $1;
 718
 719                        my $ra = Git::SVN::Ra->new($branchurl);
 720                        my (undef, undef, $props) =
 721                                $ra->get_dir(canonicalize_path("."), $svnrev);
 722                        my $par_mergeinfo = $props->{'svn:mergeinfo'};
 723                        unless (defined $par_mergeinfo) {
 724                                $par_mergeinfo = '';
 725                        }
 726                        # Merge previous mergeinfo values
 727                        $aggregate_mergeinfo =
 728                                merge_merge_info($aggregate_mergeinfo,
 729                                                                 $par_mergeinfo, 0);
 730
 731                        next if $parent eq $parents[0]; # Skip first parent
 732                        # Add new changes being placed in tree by merge
 733                        my @cmd = (qw/rev-list --reverse/,
 734                                           $parent, qw/--not/);
 735                        foreach my $par (@parents) {
 736                                unless ($par eq $parent) {
 737                                        push @cmd, $par;
 738                                }
 739                        }
 740                        my @revsin = ();
 741                        my ($revlist, $ctx) = command_output_pipe(@cmd);
 742                        while (<$revlist>) {
 743                                my $irev = $_;
 744                                chomp $irev;
 745                                my (undef, $csvnrev, undef) =
 746                                        cmt_metadata($irev);
 747                                unless (defined $csvnrev) {
 748                                        # A child is missing SVN annotations...
 749                                        # this might be OK, or might not be.
 750                                        warn "W:child $irev is merged into revision "
 751                                                 ."$d but does not have git-svn metadata. "
 752                                                 ."This means git-svn cannot determine the "
 753                                                 ."svn revision numbers to place into the "
 754                                                 ."svn:mergeinfo property. You must ensure "
 755                                                 ."a branch is entirely committed to "
 756                                                 ."SVN before merging it in order for "
 757                                                 ."svn:mergeinfo population to function "
 758                                                 ."properly";
 759                                }
 760                                push @revsin, $csvnrev;
 761                        }
 762                        command_close_pipe($revlist, $ctx);
 763
 764                        last unless $all_parents_ok;
 765
 766                        # We now have a list of all SVN revnos which are
 767                        # merged by this particular parent. Integrate them.
 768                        next if $#revsin == -1;
 769                        my $newmergeinfo = "$branchpath:" . join(',', @revsin);
 770                        $aggregate_mergeinfo =
 771                                merge_merge_info($aggregate_mergeinfo,
 772                                                                 $newmergeinfo, 1);
 773                }
 774                if ($all_parents_ok and $aggregate_mergeinfo) {
 775                        return $aggregate_mergeinfo;
 776                }
 777        }
 778
 779        return undef;
 780}
 781
 782sub dcommit_rebase {
 783        my ($is_last, $current, $fetched_ref, $svn_error) = @_;
 784        my @diff;
 785
 786        if ($svn_error) {
 787                print STDERR "\nERROR from SVN:\n",
 788                                $svn_error->expanded_message, "\n";
 789        }
 790        unless ($_no_rebase) {
 791                # we always want to rebase against the current HEAD,
 792                # not any head that was passed to us
 793                @diff = command('diff-tree', $current,
 794                           $fetched_ref, '--');
 795                my @finish;
 796                if (@diff) {
 797                        @finish = rebase_cmd();
 798                        print STDERR "W: $current and ", $fetched_ref,
 799                                     " differ, using @finish:\n",
 800                                     join("\n", @diff), "\n";
 801                } elsif ($is_last) {
 802                        print "No changes between ", $current, " and ",
 803                              $fetched_ref,
 804                              "\nResetting to the latest ",
 805                              $fetched_ref, "\n";
 806                        @finish = qw/reset --mixed/;
 807                }
 808                command_noisy(@finish, $fetched_ref) if @finish;
 809        }
 810        if ($svn_error) {
 811                die "ERROR: Not all changes have been committed into SVN"
 812                        .($_no_rebase ? ".\n" : ", however the committed\n"
 813                        ."ones (if any) seem to be successfully integrated "
 814                        ."into the working tree.\n")
 815                        ."Please see the above messages for details.\n";
 816        }
 817        return @diff;
 818}
 819
 820sub cmd_dcommit {
 821        my $head = shift;
 822        command_noisy(qw/update-index --refresh/);
 823        git_cmd_try { command_oneline(qw/diff-index --quiet HEAD/) }
 824                'Cannot dcommit with a dirty index.  Commit your changes first, '
 825                . "or stash them with `git stash'.\n";
 826        $head ||= 'HEAD';
 827
 828        my $old_head;
 829        if ($head ne 'HEAD') {
 830                $old_head = eval {
 831                        command_oneline([qw/symbolic-ref -q HEAD/])
 832                };
 833                if ($old_head) {
 834                        $old_head =~ s{^refs/heads/}{};
 835                } else {
 836                        $old_head = eval { command_oneline(qw/rev-parse HEAD/) };
 837                }
 838                command(['checkout', $head], STDERR => 0);
 839        }
 840
 841        my @refs;
 842        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD', \@refs);
 843        unless ($gs) {
 844                die "Unable to determine upstream SVN information from ",
 845                    "$head history.\nPerhaps the repository is empty.";
 846        }
 847
 848        if (defined $_commit_url) {
 849                $url = $_commit_url;
 850        } else {
 851                $url = eval { command_oneline('config', '--get',
 852                              "svn-remote.$gs->{repo_id}.commiturl") };
 853                if (!$url) {
 854                        $url = $gs->full_pushurl
 855                }
 856        }
 857
 858        my $last_rev = $_revision if defined $_revision;
 859        if ($url) {
 860                print "Committing to $url ...\n";
 861        }
 862        my ($linear_refs, $parents) = linearize_history($gs, \@refs);
 863        if ($_no_rebase && scalar(@$linear_refs) > 1) {
 864                warn "Attempting to commit more than one change while ",
 865                     "--no-rebase is enabled.\n",
 866                     "If these changes depend on each other, re-running ",
 867                     "without --no-rebase may be required."
 868        }
 869
 870        if (defined $_interactive){
 871                my $ask_default = "y";
 872                foreach my $d (@$linear_refs){
 873                        my ($fh, $ctx) = command_output_pipe(qw(show --summary), "$d");
 874                        while (<$fh>){
 875                                print $_;
 876                        }
 877                        command_close_pipe($fh, $ctx);
 878                        $_ = ask("Commit this patch to SVN? ([y]es (default)|[n]o|[q]uit|[a]ll): ",
 879                                 valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
 880                                 default => $ask_default);
 881                        die "Commit this patch reply required" unless defined $_;
 882                        if (/^[nq]/i) {
 883                                exit(0);
 884                        } elsif (/^a/i) {
 885                                last;
 886                        }
 887                }
 888        }
 889
 890        my $expect_url = $url;
 891
 892        my $push_merge_info = eval {
 893                command_oneline(qw/config --get svn.pushmergeinfo/)
 894                };
 895        if (not defined($push_merge_info)
 896                        or $push_merge_info eq "false"
 897                        or $push_merge_info eq "no"
 898                        or $push_merge_info eq "never") {
 899                $push_merge_info = 0;
 900        }
 901
 902        unless (defined($_merge_info) || ! $push_merge_info) {
 903                # Preflight check of changes to ensure no issues with mergeinfo
 904                # This includes check for uncommitted-to-SVN parents
 905                # (other than the first parent, which we will handle),
 906                # information from different SVN repos, and paths
 907                # which are not underneath this repository root.
 908                my $rooturl = $gs->repos_root;
 909                foreach my $d (@$linear_refs) {
 910                        my %parentshash;
 911                        read_commit_parents(\%parentshash, $d);
 912                        my @realparents = @{$parentshash{$d}};
 913                        if ($#realparents > 0) {
 914                                # Merge commit
 915                                shift @realparents; # Remove/ignore first parent
 916                                foreach my $parent (@realparents) {
 917                                        my ($branchurl, $svnrev, $paruuid) = cmt_metadata($parent);
 918                                        unless (defined $paruuid) {
 919                                                # A parent is missing SVN annotations...
 920                                                # abort the whole operation.
 921                                                fatal "$parent is merged into revision $d, "
 922                                                         ."but does not have git-svn metadata. "
 923                                                         ."Either dcommit the branch or use a "
 924                                                         ."local cherry-pick, FF merge, or rebase "
 925                                                         ."instead of an explicit merge commit.";
 926                                        }
 927
 928                                        unless ($paruuid eq $uuid) {
 929                                                # Parent has SVN metadata from different repository
 930                                                fatal "merge parent $parent for change $d has "
 931                                                         ."git-svn uuid $paruuid, while current change "
 932                                                         ."has uuid $uuid!";
 933                                        }
 934
 935                                        unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
 936                                                # This branch is very strange indeed.
 937                                                fatal "merge parent $parent for $d is on branch "
 938                                                         ."$branchurl, which is not under the "
 939                                                         ."git-svn root $rooturl!";
 940                                        }
 941                                }
 942                        }
 943                }
 944        }
 945
 946        my $rewritten_parent;
 947        my $current_head = command_oneline(qw/rev-parse HEAD/);
 948        Git::SVN::remove_username($expect_url);
 949        if (defined($_merge_info)) {
 950                $_merge_info =~ tr{ }{\n};
 951        }
 952        while (1) {
 953                my $d = shift @$linear_refs or last;
 954                unless (defined $last_rev) {
 955                        (undef, $last_rev, undef) = cmt_metadata("$d~1");
 956                        unless (defined $last_rev) {
 957                                fatal "Unable to extract revision information ",
 958                                      "from commit $d~1";
 959                        }
 960                }
 961                if ($_dry_run) {
 962                        print "diff-tree $d~1 $d\n";
 963                } else {
 964                        my $cmt_rev;
 965
 966                        unless (defined($_merge_info) || ! $push_merge_info) {
 967                                $_merge_info = populate_merge_info($d, $gs,
 968                                                             $uuid,
 969                                                             $linear_refs,
 970                                                             $rewritten_parent);
 971                        }
 972
 973                        my %ed_opts = ( r => $last_rev,
 974                                        log => get_commit_entry($d)->{log},
 975                                        ra => Git::SVN::Ra->new($url),
 976                                        config => SVN::Core::config_get_config(
 977                                                $Git::SVN::Ra::config_dir
 978                                        ),
 979                                        tree_a => "$d~1",
 980                                        tree_b => $d,
 981                                        editor_cb => sub {
 982                                               print "Committed r$_[0]\n";
 983                                               $cmt_rev = $_[0];
 984                                        },
 985                                        mergeinfo => $_merge_info,
 986                                        svn_path => '');
 987
 988                        my $err_handler = $SVN::Error::handler;
 989                        $SVN::Error::handler = sub {
 990                                my $err = shift;
 991                                dcommit_rebase(1, $current_head, $gs->refname,
 992                                        $err);
 993                        };
 994
 995                        if (!Git::SVN::Editor->new(\%ed_opts)->apply_diff) {
 996                                print "No changes\n$d~1 == $d\n";
 997                        } elsif ($parents->{$d} && @{$parents->{$d}}) {
 998                                $gs->{inject_parents_dcommit}->{$cmt_rev} =
 999                                                               $parents->{$d};
1000                        }
1001                        $_fetch_all ? $gs->fetch_all : $gs->fetch;
1002                        $SVN::Error::handler = $err_handler;
1003                        $last_rev = $cmt_rev;
1004                        next if $_no_rebase;
1005
1006                        my @diff = dcommit_rebase(@$linear_refs == 0, $d,
1007                                                $gs->refname, undef);
1008
1009                        $rewritten_parent = command_oneline(qw/rev-parse/,
1010                                                        $gs->refname);
1011
1012                        if (@diff) {
1013                                $current_head = command_oneline(qw/rev-parse
1014                                                                HEAD/);
1015                                @refs = ();
1016                                my ($url_, $rev_, $uuid_, $gs_) =
1017                                              working_head_info('HEAD', \@refs);
1018                                my ($linear_refs_, $parents_) =
1019                                              linearize_history($gs_, \@refs);
1020                                if (scalar(@$linear_refs) !=
1021                                    scalar(@$linear_refs_)) {
1022                                        fatal "# of revisions changed ",
1023                                          "\nbefore:\n",
1024                                          join("\n", @$linear_refs),
1025                                          "\n\nafter:\n",
1026                                          join("\n", @$linear_refs_), "\n",
1027                                          'If you are attempting to commit ',
1028                                          "merges, try running:\n\t",
1029                                          'git rebase --interactive',
1030                                          '--preserve-merges ',
1031                                          $gs->refname,
1032                                          "\nBefore dcommitting";
1033                                }
1034                                if ($url_ ne $expect_url) {
1035                                        if ($url_ eq $gs->metadata_url) {
1036                                                print
1037                                                  "Accepting rewritten URL:",
1038                                                  " $url_\n";
1039                                        } else {
1040                                                fatal
1041                                                  "URL mismatch after rebase:",
1042                                                  " $url_ != $expect_url";
1043                                        }
1044                                }
1045                                if ($uuid_ ne $uuid) {
1046                                        fatal "uuid mismatch after rebase: ",
1047                                              "$uuid_ != $uuid";
1048                                }
1049                                # remap parents
1050                                my (%p, @l, $i);
1051                                for ($i = 0; $i < scalar @$linear_refs; $i++) {
1052                                        my $new = $linear_refs_->[$i] or next;
1053                                        $p{$new} =
1054                                                $parents->{$linear_refs->[$i]};
1055                                        push @l, $new;
1056                                }
1057                                $parents = \%p;
1058                                $linear_refs = \@l;
1059                                undef $last_rev;
1060                        }
1061                }
1062        }
1063
1064        if ($old_head) {
1065                my $new_head = command_oneline(qw/rev-parse HEAD/);
1066                my $new_is_symbolic = eval {
1067                        command_oneline(qw/symbolic-ref -q HEAD/);
1068                };
1069                if ($new_is_symbolic) {
1070                        print "dcommitted the branch ", $head, "\n";
1071                } else {
1072                        print "dcommitted on a detached HEAD because you gave ",
1073                              "a revision argument.\n",
1074                              "The rewritten commit is: ", $new_head, "\n";
1075                }
1076                command(['checkout', $old_head], STDERR => 0);
1077        }
1078
1079        unlink $gs->{index};
1080}
1081
1082sub cmd_branch {
1083        my ($branch_name, $head) = @_;
1084
1085        unless (defined $branch_name && length $branch_name) {
1086                die(($_tag ? "tag" : "branch") . " name required\n");
1087        }
1088        $head ||= 'HEAD';
1089
1090        my (undef, $rev, undef, $gs) = working_head_info($head);
1091        my $src = $gs->full_pushurl;
1092
1093        my $remote = Git::SVN::read_all_remotes()->{$gs->{repo_id}};
1094        my $allglobs = $remote->{ $_tag ? 'tags' : 'branches' };
1095        my $glob;
1096        if ($#{$allglobs} == 0) {
1097                $glob = $allglobs->[0];
1098        } else {
1099                unless(defined $_branch_dest) {
1100                        die "Multiple ",
1101                            $_tag ? "tag" : "branch",
1102                            " paths defined for Subversion repository.\n",
1103                            "You must specify where you want to create the ",
1104                            $_tag ? "tag" : "branch",
1105                            " with the --destination argument.\n";
1106                }
1107                foreach my $g (@{$allglobs}) {
1108                        my $re = Git::SVN::Editor::glob2pat($g->{path}->{left});
1109                        if ($_branch_dest =~ /$re/) {
1110                                $glob = $g;
1111                                last;
1112                        }
1113                }
1114                unless (defined $glob) {
1115                        my $dest_re = qr/\b\Q$_branch_dest\E\b/;
1116                        foreach my $g (@{$allglobs}) {
1117                                $g->{path}->{left} =~ /$dest_re/ or next;
1118                                if (defined $glob) {
1119                                        die "Ambiguous destination: ",
1120                                            $_branch_dest, "\nmatches both '",
1121                                            $glob->{path}->{left}, "' and '",
1122                                            $g->{path}->{left}, "'\n";
1123                                }
1124                                $glob = $g;
1125                        }
1126                        unless (defined $glob) {
1127                                die "Unknown ",
1128                                    $_tag ? "tag" : "branch",
1129                                    " destination $_branch_dest\n";
1130                        }
1131                }
1132        }
1133        my ($lft, $rgt) = @{ $glob->{path} }{qw/left right/};
1134        my $url;
1135        if (defined $_commit_url) {
1136                $url = $_commit_url;
1137        } else {
1138                $url = eval { command_oneline('config', '--get',
1139                        "svn-remote.$gs->{repo_id}.commiturl") };
1140                if (!$url) {
1141                        $url = $remote->{pushurl} || $remote->{url};
1142                }
1143        }
1144        my $dst = join '/', $url, $lft, $branch_name, ($rgt || ());
1145
1146        if ($dst =~ /^https:/ && $src =~ /^http:/) {
1147                $src=~s/^http:/https:/;
1148        }
1149
1150        ::_req_svn();
1151
1152        my $ctx = SVN::Client->new(
1153                auth    => Git::SVN::Ra::_auth_providers(),
1154                log_msg => sub {
1155                        ${ $_[0] } = defined $_message
1156                                ? $_message
1157                                : 'Create ' . ($_tag ? 'tag ' : 'branch ' )
1158                                . $branch_name;
1159                },
1160        );
1161
1162        eval {
1163                $ctx->ls($dst, 'HEAD', 0);
1164        } and die "branch ${branch_name} already exists\n";
1165
1166        print "Copying ${src} at r${rev} to ${dst}...\n";
1167        $ctx->copy($src, $rev, $dst)
1168                unless $_dry_run;
1169
1170        $gs->fetch_all;
1171}
1172
1173sub cmd_find_rev {
1174        my $revision_or_hash = shift or die "SVN or git revision required ",
1175                                            "as a command-line argument\n";
1176        my $result;
1177        if ($revision_or_hash =~ /^r\d+$/) {
1178                my $head = shift;
1179                $head ||= 'HEAD';
1180                my @refs;
1181                my (undef, undef, $uuid, $gs) = working_head_info($head, \@refs);
1182                unless ($gs) {
1183                        die "Unable to determine upstream SVN information from ",
1184                            "$head history\n";
1185                }
1186                my $desired_revision = substr($revision_or_hash, 1);
1187                if ($_before) {
1188                        $result = $gs->find_rev_before($desired_revision, 1);
1189                } elsif ($_after) {
1190                        $result = $gs->find_rev_after($desired_revision, 1);
1191                } else {
1192                        $result = $gs->rev_map_get($desired_revision, $uuid);
1193                }
1194        } else {
1195                my (undef, $rev, undef) = cmt_metadata($revision_or_hash);
1196                $result = $rev;
1197        }
1198        print "$result\n" if $result;
1199}
1200
1201sub auto_create_empty_directories {
1202        my ($gs) = @_;
1203        my $var = eval { command_oneline('config', '--get', '--bool',
1204                                         "svn-remote.$gs->{repo_id}.automkdirs") };
1205        # By default, create empty directories by consulting the unhandled log,
1206        # but allow setting it to 'false' to skip it.
1207        return !($var && $var eq 'false');
1208}
1209
1210sub cmd_rebase {
1211        command_noisy(qw/update-index --refresh/);
1212        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1213        unless ($gs) {
1214                die "Unable to determine upstream SVN information from ",
1215                    "working tree history\n";
1216        }
1217        if ($_dry_run) {
1218                print "Remote Branch: " . $gs->refname . "\n";
1219                print "SVN URL: " . $url . "\n";
1220                return;
1221        }
1222        if (command(qw/diff-index HEAD --/)) {
1223                print STDERR "Cannot rebase with uncommited changes:\n";
1224                command_noisy('status');
1225                exit 1;
1226        }
1227        unless ($_local) {
1228                # rebase will checkout for us, so no need to do it explicitly
1229                $_no_checkout = 'true';
1230                $_fetch_all ? $gs->fetch_all : $gs->fetch;
1231        }
1232        command_noisy(rebase_cmd(), $gs->refname);
1233        if (auto_create_empty_directories($gs)) {
1234                $gs->mkemptydirs;
1235        }
1236}
1237
1238sub cmd_show_ignore {
1239        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1240        $gs ||= Git::SVN->new;
1241        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1242        $gs->prop_walk($gs->path, $r, sub {
1243                my ($gs, $path, $props) = @_;
1244                print STDOUT "\n# $path\n";
1245                my $s = $props->{'svn:ignore'} or return;
1246                $s =~ s/[\r\n]+/\n/g;
1247                $s =~ s/^\n+//;
1248                chomp $s;
1249                $s =~ s#^#$path#gm;
1250                print STDOUT "$s\n";
1251        });
1252}
1253
1254sub cmd_show_externals {
1255        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1256        $gs ||= Git::SVN->new;
1257        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1258        $gs->prop_walk($gs->path, $r, sub {
1259                my ($gs, $path, $props) = @_;
1260                print STDOUT "\n# $path\n";
1261                my $s = $props->{'svn:externals'} or return;
1262                $s =~ s/[\r\n]+/\n/g;
1263                chomp $s;
1264                $s =~ s#^#$path#gm;
1265                print STDOUT "$s\n";
1266        });
1267}
1268
1269sub cmd_create_ignore {
1270        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1271        $gs ||= Git::SVN->new;
1272        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1273        $gs->prop_walk($gs->path, $r, sub {
1274                my ($gs, $path, $props) = @_;
1275                # $path is of the form /path/to/dir/
1276                $path = '.' . $path;
1277                # SVN can have attributes on empty directories,
1278                # which git won't track
1279                mkpath([$path]) unless -d $path;
1280                my $ignore = $path . '.gitignore';
1281                my $s = $props->{'svn:ignore'} or return;
1282                open(GITIGNORE, '>', $ignore)
1283                  or fatal("Failed to open `$ignore' for writing: $!");
1284                $s =~ s/[\r\n]+/\n/g;
1285                $s =~ s/^\n+//;
1286                chomp $s;
1287                # Prefix all patterns so that the ignore doesn't apply
1288                # to sub-directories.
1289                $s =~ s#^#/#gm;
1290                print GITIGNORE "$s\n";
1291                close(GITIGNORE)
1292                  or fatal("Failed to close `$ignore': $!");
1293                command_noisy('add', '-f', $ignore);
1294        });
1295}
1296
1297sub cmd_mkdirs {
1298        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1299        $gs ||= Git::SVN->new;
1300        $gs->mkemptydirs($_revision);
1301}
1302
1303# get_svnprops(PATH)
1304# ------------------
1305# Helper for cmd_propget and cmd_proplist below.
1306sub get_svnprops {
1307        my $path = shift;
1308        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1309        $gs ||= Git::SVN->new;
1310
1311        # prefix THE PATH by the sub-directory from which the user
1312        # invoked us.
1313        $path = $cmd_dir_prefix . $path;
1314        fatal("No such file or directory: $path") unless -e $path;
1315        my $is_dir = -d $path ? 1 : 0;
1316        $path = join_paths($gs->path, $path);
1317
1318        # canonicalize the path (otherwise libsvn will abort or fail to
1319        # find the file)
1320        $path = canonicalize_path($path);
1321
1322        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
1323        my $props;
1324        if ($is_dir) {
1325                (undef, undef, $props) = $gs->ra->get_dir($path, $r);
1326        }
1327        else {
1328                (undef, $props) = $gs->ra->get_file($path, $r, undef);
1329        }
1330        return $props;
1331}
1332
1333# cmd_propget (PROP, PATH)
1334# ------------------------
1335# Print the SVN property PROP for PATH.
1336sub cmd_propget {
1337        my ($prop, $path) = @_;
1338        $path = '.' if not defined $path;
1339        usage(1) if not defined $prop;
1340        my $props = get_svnprops($path);
1341        if (not defined $props->{$prop}) {
1342                fatal("`$path' does not have a `$prop' SVN property.");
1343        }
1344        print $props->{$prop} . "\n";
1345}
1346
1347# cmd_proplist (PATH)
1348# -------------------
1349# Print the list of SVN properties for PATH.
1350sub cmd_proplist {
1351        my $path = shift;
1352        $path = '.' if not defined $path;
1353        my $props = get_svnprops($path);
1354        print "Properties on '$path':\n";
1355        foreach (sort keys %{$props}) {
1356                print "  $_\n";
1357        }
1358}
1359
1360sub cmd_multi_init {
1361        my $url = shift;
1362        unless (defined $_trunk || @_branches || @_tags) {
1363                usage(1);
1364        }
1365
1366        $_prefix = '' unless defined $_prefix;
1367        if (defined $url) {
1368                $url = canonicalize_url($url);
1369                init_subdir(@_);
1370        }
1371        do_git_init_db();
1372        if (defined $_trunk) {
1373                $_trunk =~ s#^/+##;
1374                my $trunk_ref = 'refs/remotes/' . $_prefix . 'trunk';
1375                # try both old-style and new-style lookups:
1376                my $gs_trunk = eval { Git::SVN->new($trunk_ref) };
1377                unless ($gs_trunk) {
1378                        my ($trunk_url, $trunk_path) =
1379                                              complete_svn_url($url, $_trunk);
1380                        $gs_trunk = Git::SVN->init($trunk_url, $trunk_path,
1381                                                   undef, $trunk_ref);
1382                }
1383        }
1384        return unless @_branches || @_tags;
1385        my $ra = $url ? Git::SVN::Ra->new($url) : undef;
1386        foreach my $path (@_branches) {
1387                complete_url_ls_init($ra, $path, '--branches/-b', $_prefix);
1388        }
1389        foreach my $path (@_tags) {
1390                complete_url_ls_init($ra, $path, '--tags/-t', $_prefix.'tags/');
1391        }
1392}
1393
1394sub cmd_multi_fetch {
1395        $Git::SVN::no_reuse_existing = undef;
1396        my $remotes = Git::SVN::read_all_remotes();
1397        foreach my $repo_id (sort keys %$remotes) {
1398                if ($remotes->{$repo_id}->{url}) {
1399                        Git::SVN::fetch_all($repo_id, $remotes);
1400                }
1401        }
1402}
1403
1404# this command is special because it requires no metadata
1405sub cmd_commit_diff {
1406        my ($ta, $tb, $url) = @_;
1407        my $usage = "Usage: $0 commit-diff -r<revision> ".
1408                    "<tree-ish> <tree-ish> [<URL>]";
1409        fatal($usage) if (!defined $ta || !defined $tb);
1410        my $svn_path = '';
1411        if (!defined $url) {
1412                my $gs = eval { Git::SVN->new };
1413                if (!$gs) {
1414                        fatal("Needed URL or usable git-svn --id in ",
1415                              "the command-line\n", $usage);
1416                }
1417                $url = $gs->url;
1418                $svn_path = $gs->path;
1419        }
1420        unless (defined $_revision) {
1421                fatal("-r|--revision is a required argument\n", $usage);
1422        }
1423        if (defined $_message && defined $_file) {
1424                fatal("Both --message/-m and --file/-F specified ",
1425                      "for the commit message.\n",
1426                      "I have no idea what you mean");
1427        }
1428        if (defined $_file) {
1429                $_message = file_to_s($_file);
1430        } else {
1431                $_message ||= get_commit_entry($tb)->{log};
1432        }
1433        my $ra ||= Git::SVN::Ra->new($url);
1434        my $r = $_revision;
1435        if ($r eq 'HEAD') {
1436                $r = $ra->get_latest_revnum;
1437        } elsif ($r !~ /^\d+$/) {
1438                die "revision argument: $r not understood by git-svn\n";
1439        }
1440        my %ed_opts = ( r => $r,
1441                        log => $_message,
1442                        ra => $ra,
1443                        tree_a => $ta,
1444                        tree_b => $tb,
1445                        editor_cb => sub { print "Committed r$_[0]\n" },
1446                        svn_path => $svn_path );
1447        if (!Git::SVN::Editor->new(\%ed_opts)->apply_diff) {
1448                print "No changes\n$ta == $tb\n";
1449        }
1450}
1451
1452
1453sub cmd_info {
1454        my $path = canonicalize_path(defined($_[0]) ? $_[0] : ".");
1455        my $fullpath = canonicalize_path($cmd_dir_prefix . $path);
1456        if (exists $_[1]) {
1457                die "Too many arguments specified\n";
1458        }
1459
1460        my ($file_type, $diff_status) = find_file_type_and_diff_status($path);
1461
1462        if (!$file_type && !$diff_status) {
1463                print STDERR "svn: '$path' is not under version control\n";
1464                exit 1;
1465        }
1466
1467        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1468        unless ($gs) {
1469                die "Unable to determine upstream SVN information from ",
1470                    "working tree history\n";
1471        }
1472
1473        # canonicalize_path() will return "" to make libsvn 1.5.x happy,
1474        $path = "." if $path eq "";
1475
1476        my $full_url = canonicalize_url( add_path_to_url( $url, $fullpath ) );
1477
1478        if ($_url) {
1479                print "$full_url\n";
1480                return;
1481        }
1482
1483        my $result = "Path: $path\n";
1484        $result .= "Name: " . basename($path) . "\n" if $file_type ne "dir";
1485        $result .= "URL: $full_url\n";
1486
1487        eval {
1488                my $repos_root = $gs->repos_root;
1489                Git::SVN::remove_username($repos_root);
1490                $result .= "Repository Root: " . canonicalize_url($repos_root) . "\n";
1491        };
1492        if ($@) {
1493                $result .= "Repository Root: (offline)\n";
1494        }
1495        ::_req_svn();
1496        $result .= "Repository UUID: $uuid\n" unless $diff_status eq "A" &&
1497                (::compare_svn_version('1.5.4') <= 0 || $file_type ne "dir");
1498        $result .= "Revision: " . ($diff_status eq "A" ? 0 : $rev) . "\n";
1499
1500        $result .= "Node Kind: " .
1501                   ($file_type eq "dir" ? "directory" : "file") . "\n";
1502
1503        my $schedule = $diff_status eq "A"
1504                       ? "add"
1505                       : ($diff_status eq "D" ? "delete" : "normal");
1506        $result .= "Schedule: $schedule\n";
1507
1508        if ($diff_status eq "A") {
1509                print $result, "\n";
1510                return;
1511        }
1512
1513        my ($lc_author, $lc_rev, $lc_date_utc);
1514        my @args = Git::SVN::Log::git_svn_log_cmd($rev, $rev, "--", $fullpath);
1515        my $log = command_output_pipe(@args);
1516        my $esc_color = qr/(?:\033\[(?:(?:\d+;)*\d*)?m)*/;
1517        while (<$log>) {
1518                if (/^${esc_color}author (.+) <[^>]+> (\d+) ([\-\+]?\d+)$/o) {
1519                        $lc_author = $1;
1520                        $lc_date_utc = Git::SVN::Log::parse_git_date($2, $3);
1521                } elsif (/^${esc_color}    (git-svn-id:.+)$/o) {
1522                        (undef, $lc_rev, undef) = ::extract_metadata($1);
1523                }
1524        }
1525        close $log;
1526
1527        Git::SVN::Log::set_local_timezone();
1528
1529        $result .= "Last Changed Author: $lc_author\n";
1530        $result .= "Last Changed Rev: $lc_rev\n";
1531        $result .= "Last Changed Date: " .
1532                   Git::SVN::Log::format_svn_date($lc_date_utc) . "\n";
1533
1534        if ($file_type ne "dir") {
1535                my $text_last_updated_date =
1536                    ($diff_status eq "D" ? $lc_date_utc : (stat $path)[9]);
1537                $result .=
1538                    "Text Last Updated: " .
1539                    Git::SVN::Log::format_svn_date($text_last_updated_date) .
1540                    "\n";
1541                my $checksum;
1542                if ($diff_status eq "D") {
1543                        my ($fh, $ctx) =
1544                            command_output_pipe(qw(cat-file blob), "HEAD:$path");
1545                        if ($file_type eq "link") {
1546                                my $file_name = <$fh>;
1547                                $checksum = md5sum("link $file_name");
1548                        } else {
1549                                $checksum = md5sum($fh);
1550                        }
1551                        command_close_pipe($fh, $ctx);
1552                } elsif ($file_type eq "link") {
1553                        my $file_name =
1554                            command(qw(cat-file blob), "HEAD:$path");
1555                        $checksum =
1556                            md5sum("link " . $file_name);
1557                } else {
1558                        open FILE, "<", $path or die $!;
1559                        $checksum = md5sum(\*FILE);
1560                        close FILE or die $!;
1561                }
1562                $result .= "Checksum: " . $checksum . "\n";
1563        }
1564
1565        print $result, "\n";
1566}
1567
1568sub cmd_reset {
1569        my $target = shift || $_revision or die "SVN revision required\n";
1570        $target = $1 if $target =~ /^r(\d+)$/;
1571        $target =~ /^\d+$/ or die "Numeric SVN revision expected\n";
1572        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
1573        unless ($gs) {
1574                die "Unable to determine upstream SVN information from ".
1575                    "history\n";
1576        }
1577        my ($r, $c) = $gs->find_rev_before($target, not $_fetch_parent);
1578        die "Cannot find SVN revision $target\n" unless defined($c);
1579        $gs->rev_map_set($r, $c, 'reset', $uuid);
1580        print "r$r = $c ($gs->{ref_id})\n";
1581}
1582
1583sub cmd_gc {
1584        if (!can_compress()) {
1585                warn "Compress::Zlib could not be found; unhandled.log " .
1586                     "files will not be compressed.\n";
1587        }
1588        find({ wanted => \&gc_directory, no_chdir => 1}, "$ENV{GIT_DIR}/svn");
1589}
1590
1591########################### utility functions #########################
1592
1593sub rebase_cmd {
1594        my @cmd = qw/rebase/;
1595        push @cmd, '-v' if $_verbose;
1596        push @cmd, qw/--merge/ if $_merge;
1597        push @cmd, "--strategy=$_strategy" if $_strategy;
1598        push @cmd, "--preserve-merges" if $_preserve_merges;
1599        @cmd;
1600}
1601
1602sub post_fetch_checkout {
1603        return if $_no_checkout;
1604        return if verify_ref('HEAD^0');
1605        my $gs = $Git::SVN::_head or return;
1606
1607        # look for "trunk" ref if it exists
1608        my $remote = Git::SVN::read_all_remotes()->{$gs->{repo_id}};
1609        my $fetch = $remote->{fetch};
1610        if ($fetch) {
1611                foreach my $p (keys %$fetch) {
1612                        basename($fetch->{$p}) eq 'trunk' or next;
1613                        $gs = Git::SVN->new($fetch->{$p}, $gs->{repo_id}, $p);
1614                        last;
1615                }
1616        }
1617
1618        command_noisy(qw(update-ref HEAD), $gs->refname);
1619        return unless verify_ref('HEAD^0');
1620
1621        return if $ENV{GIT_DIR} !~ m#^(?:.*/)?\.git$#;
1622        my $index = $ENV{GIT_INDEX_FILE} || "$ENV{GIT_DIR}/index";
1623        return if -f $index;
1624
1625        return if command_oneline(qw/rev-parse --is-inside-work-tree/) eq 'false';
1626        return if command_oneline(qw/rev-parse --is-inside-git-dir/) eq 'true';
1627        command_noisy(qw/read-tree -m -u -v HEAD HEAD/);
1628        print STDERR "Checked out HEAD:\n  ",
1629                     $gs->full_url, " r", $gs->last_rev, "\n";
1630        if (auto_create_empty_directories($gs)) {
1631                $gs->mkemptydirs($gs->last_rev);
1632        }
1633}
1634
1635sub complete_svn_url {
1636        my ($url, $path) = @_;
1637        $path = canonicalize_path($path);
1638
1639        # If the path is not a URL...
1640        if ($path !~ m#^[a-z\+]+://#) {
1641                if (!defined $url || $url !~ m#^[a-z\+]+://#) {
1642                        fatal("E: '$path' is not a complete URL ",
1643                              "and a separate URL is not specified");
1644                }
1645                return ($url, $path);
1646        }
1647        return ($path, '');
1648}
1649
1650sub complete_url_ls_init {
1651        my ($ra, $repo_path, $switch, $pfx) = @_;
1652        unless ($repo_path) {
1653                print STDERR "W: $switch not specified\n";
1654                return;
1655        }
1656        $repo_path = canonicalize_path($repo_path);
1657        if ($repo_path =~ m#^[a-z\+]+://#) {
1658                $ra = Git::SVN::Ra->new($repo_path);
1659                $repo_path = '';
1660        } else {
1661                $repo_path =~ s#^/+##;
1662                unless ($ra) {
1663                        fatal("E: '$repo_path' is not a complete URL ",
1664                              "and a separate URL is not specified");
1665                }
1666        }
1667        my $url = $ra->url;
1668        my $gs = Git::SVN->init($url, undef, undef, undef, 1);
1669        my $k = "svn-remote.$gs->{repo_id}.url";
1670        my $orig_url = eval { command_oneline(qw/config --get/, $k) };
1671        if ($orig_url && ($orig_url ne $gs->url)) {
1672                die "$k already set: $orig_url\n",
1673                    "wanted to set to: $gs->url\n";
1674        }
1675        command_oneline('config', $k, $gs->url) unless $orig_url;
1676
1677        my $remote_path = join_paths( $gs->path, $repo_path );
1678        $remote_path =~ s{%([0-9A-F]{2})}{chr hex($1)}ieg;
1679        $remote_path =~ s#^/##g;
1680        $remote_path .= "/*" if $remote_path !~ /\*/;
1681        my ($n) = ($switch =~ /^--(\w+)/);
1682        if (length $pfx && $pfx !~ m#/$#) {
1683                die "--prefix='$pfx' must have a trailing slash '/'\n";
1684        }
1685        command_noisy('config',
1686                      '--add',
1687                      "svn-remote.$gs->{repo_id}.$n",
1688                      "$remote_path:refs/remotes/$pfx*" .
1689                        ('/*' x (($remote_path =~ tr/*/*/) - 1)) );
1690}
1691
1692sub verify_ref {
1693        my ($ref) = @_;
1694        eval { command_oneline([ 'rev-parse', '--verify', $ref ],
1695                               { STDERR => 0 }); };
1696}
1697
1698sub get_tree_from_treeish {
1699        my ($treeish) = @_;
1700        # $treeish can be a symbolic ref, too:
1701        my $type = command_oneline(qw/cat-file -t/, $treeish);
1702        my $expected;
1703        while ($type eq 'tag') {
1704                ($treeish, $type) = command(qw/cat-file tag/, $treeish);
1705        }
1706        if ($type eq 'commit') {
1707                $expected = (grep /^tree /, command(qw/cat-file commit/,
1708                                                    $treeish))[0];
1709                ($expected) = ($expected =~ /^tree ($sha1)$/o);
1710                die "Unable to get tree from $treeish\n" unless $expected;
1711        } elsif ($type eq 'tree') {
1712                $expected = $treeish;
1713        } else {
1714                die "$treeish is a $type, expected tree, tag or commit\n";
1715        }
1716        return $expected;
1717}
1718
1719sub get_commit_entry {
1720        my ($treeish) = shift;
1721        my %log_entry = ( log => '', tree => get_tree_from_treeish($treeish) );
1722        my $commit_editmsg = "$ENV{GIT_DIR}/COMMIT_EDITMSG";
1723        my $commit_msg = "$ENV{GIT_DIR}/COMMIT_MSG";
1724        open my $log_fh, '>', $commit_editmsg or croak $!;
1725
1726        my $type = command_oneline(qw/cat-file -t/, $treeish);
1727        if ($type eq 'commit' || $type eq 'tag') {
1728                my ($msg_fh, $ctx) = command_output_pipe('cat-file',
1729                                                         $type, $treeish);
1730                my $in_msg = 0;
1731                my $author;
1732                my $saw_from = 0;
1733                my $msgbuf = "";
1734                while (<$msg_fh>) {
1735                        if (!$in_msg) {
1736                                $in_msg = 1 if (/^\s*$/);
1737                                $author = $1 if (/^author (.*>)/);
1738                        } elsif (/^git-svn-id: /) {
1739                                # skip this for now, we regenerate the
1740                                # correct one on re-fetch anyways
1741                                # TODO: set *:merge properties or like...
1742                        } else {
1743                                if (/^From:/ || /^Signed-off-by:/) {
1744                                        $saw_from = 1;
1745                                }
1746                                $msgbuf .= $_;
1747                        }
1748                }
1749                $msgbuf =~ s/\s+$//s;
1750                if ($Git::SVN::_add_author_from && defined($author)
1751                    && !$saw_from) {
1752                        $msgbuf .= "\n\nFrom: $author";
1753                }
1754                print $log_fh $msgbuf or croak $!;
1755                command_close_pipe($msg_fh, $ctx);
1756        }
1757        close $log_fh or croak $!;
1758
1759        if ($_edit || ($type eq 'tree')) {
1760                chomp(my $editor = command_oneline(qw(var GIT_EDITOR)));
1761                system('sh', '-c', $editor.' "$@"', $editor, $commit_editmsg);
1762        }
1763        rename $commit_editmsg, $commit_msg or croak $!;
1764        {
1765                require Encode;
1766                # SVN requires messages to be UTF-8 when entering the repo
1767                local $/;
1768                open $log_fh, '<', $commit_msg or croak $!;
1769                binmode $log_fh;
1770                chomp($log_entry{log} = <$log_fh>);
1771
1772                my $enc = Git::config('i18n.commitencoding') || 'UTF-8';
1773                my $msg = $log_entry{log};
1774
1775                eval { $msg = Encode::decode($enc, $msg, 1) };
1776                if ($@) {
1777                        die "Could not decode as $enc:\n", $msg,
1778                            "\nPerhaps you need to set i18n.commitencoding\n";
1779                }
1780
1781                eval { $msg = Encode::encode('UTF-8', $msg, 1) };
1782                die "Could not encode as UTF-8:\n$msg\n" if $@;
1783
1784                $log_entry{log} = $msg;
1785
1786                close $log_fh or croak $!;
1787        }
1788        unlink $commit_msg;
1789        \%log_entry;
1790}
1791
1792sub s_to_file {
1793        my ($str, $file, $mode) = @_;
1794        open my $fd,'>',$file or croak $!;
1795        print $fd $str,"\n" or croak $!;
1796        close $fd or croak $!;
1797        chmod ($mode &~ umask, $file) if (defined $mode);
1798}
1799
1800sub file_to_s {
1801        my $file = shift;
1802        open my $fd,'<',$file or croak "$!: file: $file\n";
1803        local $/;
1804        my $ret = <$fd>;
1805        close $fd or croak $!;
1806        $ret =~ s/\s*$//s;
1807        return $ret;
1808}
1809
1810# '<svn username> = real-name <email address>' mapping based on git-svnimport:
1811sub load_authors {
1812        open my $authors, '<', $_authors or die "Can't open $_authors $!\n";
1813        my $log = $cmd eq 'log';
1814        while (<$authors>) {
1815                chomp;
1816                next unless /^(.+?|\(no author\))\s*=\s*(.+?)\s*<(.+)>\s*$/;
1817                my ($user, $name, $email) = ($1, $2, $3);
1818                if ($log) {
1819                        $Git::SVN::Log::rusers{"$name <$email>"} = $user;
1820                } else {
1821                        $users{$user} = [$name, $email];
1822                }
1823        }
1824        close $authors or croak $!;
1825}
1826
1827# convert GetOpt::Long specs for use by git-config
1828sub read_git_config {
1829        my $opts = shift;
1830        my @config_only;
1831        foreach my $o (keys %$opts) {
1832                # if we have mixedCase and a long option-only, then
1833                # it's a config-only variable that we don't need for
1834                # the command-line.
1835                push @config_only, $o if ($o =~ /[A-Z]/ && $o =~ /^[a-z]+$/i);
1836                my $v = $opts->{$o};
1837                my ($key) = ($o =~ /^([a-zA-Z\-]+)/);
1838                $key =~ s/-//g;
1839                my $arg = 'git config';
1840                $arg .= ' --int' if ($o =~ /[:=]i$/);
1841                $arg .= ' --bool' if ($o !~ /[:=][sfi]$/);
1842                if (ref $v eq 'ARRAY') {
1843                        chomp(my @tmp = `$arg --get-all svn.$key`);
1844                        @$v = @tmp if @tmp;
1845                } else {
1846                        chomp(my $tmp = `$arg --get svn.$key`);
1847                        if ($tmp && !($arg =~ / --bool/ && $tmp eq 'false')) {
1848                                $$v = $tmp;
1849                        }
1850                }
1851        }
1852        delete @$opts{@config_only} if @config_only;
1853}
1854
1855sub extract_metadata {
1856        my $id = shift or return (undef, undef, undef);
1857        my ($url, $rev, $uuid) = ($id =~ /^\s*git-svn-id:\s+(.*)\@(\d+)
1858                                                        \s([a-f\d\-]+)$/ix);
1859        if (!defined $rev || !$uuid || !$url) {
1860                # some of the original repositories I made had
1861                # identifiers like this:
1862                ($rev, $uuid) = ($id =~/^\s*git-svn-id:\s(\d+)\@([a-f\d\-]+)/i);
1863        }
1864        return ($url, $rev, $uuid);
1865}
1866
1867sub cmt_metadata {
1868        return extract_metadata((grep(/^git-svn-id: /,
1869                command(qw/cat-file commit/, shift)))[-1]);
1870}
1871
1872sub cmt_sha2rev_batch {
1873        my %s2r;
1874        my ($pid, $in, $out, $ctx) = command_bidi_pipe(qw/cat-file --batch/);
1875        my $list = shift;
1876
1877        foreach my $sha (@{$list}) {
1878                my $first = 1;
1879                my $size = 0;
1880                print $out $sha, "\n";
1881
1882                while (my $line = <$in>) {
1883                        if ($first && $line =~ /^[[:xdigit:]]{40}\smissing$/) {
1884                                last;
1885                        } elsif ($first &&
1886                               $line =~ /^[[:xdigit:]]{40}\scommit\s(\d+)$/) {
1887                                $first = 0;
1888                                $size = $1;
1889                                next;
1890                        } elsif ($line =~ /^(git-svn-id: )/) {
1891                                my (undef, $rev, undef) =
1892                                                      extract_metadata($line);
1893                                $s2r{$sha} = $rev;
1894                        }
1895
1896                        $size -= length($line);
1897                        last if ($size == 0);
1898                }
1899        }
1900
1901        command_close_bidi_pipe($pid, $in, $out, $ctx);
1902
1903        return \%s2r;
1904}
1905
1906sub working_head_info {
1907        my ($head, $refs) = @_;
1908        my @args = qw/rev-list --first-parent --pretty=medium/;
1909        my ($fh, $ctx) = command_output_pipe(@args, $head);
1910        my $hash;
1911        my %max;
1912        while (<$fh>) {
1913                if ( m{^commit ($::sha1)$} ) {
1914                        unshift @$refs, $hash if $hash and $refs;
1915                        $hash = $1;
1916                        next;
1917                }
1918                next unless s{^\s*(git-svn-id:)}{$1};
1919                my ($url, $rev, $uuid) = extract_metadata($_);
1920                if (defined $url && defined $rev) {
1921                        next if $max{$url} and $max{$url} < $rev;
1922                        if (my $gs = Git::SVN->find_by_url($url)) {
1923                                my $c = $gs->rev_map_get($rev, $uuid);
1924                                if ($c && $c eq $hash) {
1925                                        close $fh; # break the pipe
1926                                        return ($url, $rev, $uuid, $gs);
1927                                } else {
1928                                        $max{$url} ||= $gs->rev_map_max;
1929                                }
1930                        }
1931                }
1932        }
1933        command_close_pipe($fh, $ctx);
1934        (undef, undef, undef, undef);
1935}
1936
1937sub read_commit_parents {
1938        my ($parents, $c) = @_;
1939        chomp(my $p = command_oneline(qw/rev-list --parents -1/, $c));
1940        $p =~ s/^($c)\s*// or die "rev-list --parents -1 $c failed!\n";
1941        @{$parents->{$c}} = split(/ /, $p);
1942}
1943
1944sub linearize_history {
1945        my ($gs, $refs) = @_;
1946        my %parents;
1947        foreach my $c (@$refs) {
1948                read_commit_parents(\%parents, $c);
1949        }
1950
1951        my @linear_refs;
1952        my %skip = ();
1953        my $last_svn_commit = $gs->last_commit;
1954        foreach my $c (reverse @$refs) {
1955                next if $c eq $last_svn_commit;
1956                last if $skip{$c};
1957
1958                unshift @linear_refs, $c;
1959                $skip{$c} = 1;
1960
1961                # we only want the first parent to diff against for linear
1962                # history, we save the rest to inject when we finalize the
1963                # svn commit
1964                my $fp_a = verify_ref("$c~1");
1965                my $fp_b = shift @{$parents{$c}} if $parents{$c};
1966                if (!$fp_a || !$fp_b) {
1967                        die "Commit $c\n",
1968                            "has no parent commit, and therefore ",
1969                            "nothing to diff against.\n",
1970                            "You should be working from a repository ",
1971                            "originally created by git-svn\n";
1972                }
1973                if ($fp_a ne $fp_b) {
1974                        die "$c~1 = $fp_a, however parsing commit $c ",
1975                            "revealed that:\n$c~1 = $fp_b\nBUG!\n";
1976                }
1977
1978                foreach my $p (@{$parents{$c}}) {
1979                        $skip{$p} = 1;
1980                }
1981        }
1982        (\@linear_refs, \%parents);
1983}
1984
1985sub find_file_type_and_diff_status {
1986        my ($path) = @_;
1987        return ('dir', '') if $path eq '';
1988
1989        my $diff_output =
1990            command_oneline(qw(diff --cached --name-status --), $path) || "";
1991        my $diff_status = (split(' ', $diff_output))[0] || "";
1992
1993        my $ls_tree = command_oneline(qw(ls-tree HEAD), $path) || "";
1994
1995        return (undef, undef) if !$diff_status && !$ls_tree;
1996
1997        if ($diff_status eq "A") {
1998                return ("link", $diff_status) if -l $path;
1999                return ("dir", $diff_status) if -d $path;
2000                return ("file", $diff_status);
2001        }
2002
2003        my $mode = (split(' ', $ls_tree))[0] || "";
2004
2005        return ("link", $diff_status) if $mode eq "120000";
2006        return ("dir", $diff_status) if $mode eq "040000";
2007        return ("file", $diff_status);
2008}
2009
2010sub md5sum {
2011        my $arg = shift;
2012        my $ref = ref $arg;
2013        my $md5 = Digest::MD5->new();
2014        if ($ref eq 'GLOB' || $ref eq 'IO::File' || $ref eq 'File::Temp') {
2015                $md5->addfile($arg) or croak $!;
2016        } elsif ($ref eq 'SCALAR') {
2017                $md5->add($$arg) or croak $!;
2018        } elsif (!$ref) {
2019                $md5->add($arg) or croak $!;
2020        } else {
2021                fatal "Can't provide MD5 hash for unknown ref type: '", $ref, "'";
2022        }
2023        return $md5->hexdigest();
2024}
2025
2026sub gc_directory {
2027        if (can_compress() && -f $_ && basename($_) eq "unhandled.log") {
2028                my $out_filename = $_ . ".gz";
2029                open my $in_fh, "<", $_ or die "Unable to open $_: $!\n";
2030                binmode $in_fh;
2031                my $gz = Compress::Zlib::gzopen($out_filename, "ab") or
2032                                die "Unable to open $out_filename: $!\n";
2033
2034                my $res;
2035                while ($res = sysread($in_fh, my $str, 1024)) {
2036                        $gz->gzwrite($str) or
2037                                die "Unable to write: ".$gz->gzerror()."!\n";
2038                }
2039                unlink $_ or die "unlink $File::Find::name: $!\n";
2040        } elsif (-f $_ && basename($_) eq "index") {
2041                unlink $_ or die "unlink $_: $!\n";
2042        }
2043}
2044
2045__END__
2046
2047Data structures:
2048
2049
2050$remotes = { # returned by read_all_remotes()
2051        'svn' => {
2052                # svn-remote.svn.url=https://svn.musicpd.org
2053                url => 'https://svn.musicpd.org',
2054                # svn-remote.svn.fetch=mpd/trunk:trunk
2055                fetch => {
2056                        'mpd/trunk' => 'trunk',
2057                },
2058                # svn-remote.svn.tags=mpd/tags/*:tags/*
2059                tags => {
2060                        path => {
2061                                left => 'mpd/tags',
2062                                right => '',
2063                                regex => qr!mpd/tags/([^/]+)$!,
2064                                glob => 'tags/*',
2065                        },
2066                        ref => {
2067                                left => 'tags',
2068                                right => '',
2069                                regex => qr!tags/([^/]+)$!,
2070                                glob => 'tags/*',
2071                        },
2072                }
2073        }
2074};
2075
2076$log_entry hashref as returned by libsvn_log_entry()
2077{
2078        log => 'whitespace-formatted log entry
2079',                                              # trailing newline is preserved
2080        revision => '8',                        # integer
2081        date => '2004-02-24T17:01:44.108345Z',  # commit date
2082        author => 'committer name'
2083};
2084
2085
2086# this is generated by generate_diff();
2087@mods = array of diff-index line hashes, each element represents one line
2088        of diff-index output
2089
2090diff-index line ($m hash)
2091{
2092        mode_a => first column of diff-index output, no leading ':',
2093        mode_b => second column of diff-index output,
2094        sha1_b => sha1sum of the final blob,
2095        chg => change type [MCRADT],
2096        file_a => original file name of a file (iff chg is 'C' or 'R')
2097        file_b => new/current file name of a file (any chg)
2098}
2099;
2100
2101# retval of read_url_paths{,_all}();
2102$l_map = {
2103        # repository root url
2104        'https://svn.musicpd.org' => {
2105                # repository path               # GIT_SVN_ID
2106                'mpd/trunk'             =>      'trunk',
2107                'mpd/tags/0.11.5'       =>      'tags/0.11.5',
2108        },
2109}
2110
2111Notes:
2112        I don't trust the each() function on unless I created %hash myself
2113        because the internal iterator may not have started at base.