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