Andrew's git - gitweb.git/blob

   1#!/usr/bin/env perl
   2# Copyright (C) 2006, Eric Wong <normalperson@yhbt.net>
   3# License: GPL v2 or later
   4use warnings;
   5use strict;
   6use vars qw/    $AUTHOR $VERSION
   7                $sha1 $sha1_short $_revision
   8                $_q $_authors %users/;
   9$AUTHOR = 'Eric Wong <normalperson@yhbt.net>';
  10$VERSION = '@@GIT_VERSION@@';
  11
  12my $git_dir_user_set = 1 if defined $ENV{GIT_DIR};
  13$ENV{GIT_DIR} ||= '.git';
  14$Git::SVN::default_repo_id = 'svn';
  15$Git::SVN::default_ref_id = $ENV{GIT_SVN_ID} || 'git-svn';
  16$Git::SVN::Ra::_log_window_size = 100;
  17
  18$Git::SVN::Log::TZ = $ENV{TZ};
  19$ENV{TZ} = 'UTC';
  20$| = 1; # unbuffer STDOUT
  21
  22sub fatal (@) { print STDERR @_; exit 1 }
  23require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
  24require SVN::Ra;
  25require SVN::Delta;
  26if ($SVN::Core::VERSION lt '1.1.0') {
  27        fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)\n";
  28}
  29push @Git::SVN::Ra::ISA, 'SVN::Ra';
  30push @SVN::Git::Editor::ISA, 'SVN::Delta::Editor';
  31push @SVN::Git::Fetcher::ISA, 'SVN::Delta::Editor';
  32use Carp qw/croak/;
  33use IO::File qw//;
  34use File::Basename qw/dirname basename/;
  35use File::Path qw/mkpath/;
  36use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
  37use IPC::Open3;
  38use Git;
  39
  40BEGIN {
  41        # import functions from Git into our packages, en masse
  42        no strict 'refs';
  43        foreach (qw/command command_oneline command_noisy command_output_pipe
  44                    command_input_pipe command_close_pipe/) {
  45                for my $package ( qw(SVN::Git::Editor SVN::Git::Fetcher
  46                        Git::SVN::Migration Git::SVN::Log Git::SVN),
  47                        __PACKAGE__) {
  48                        *{"${package}::$_"} = \&{"Git::$_"};
  49                }
  50        }
  51}
  52
  53my ($SVN);
  54
  55$sha1 = qr/[a-f\d]{40}/;
  56$sha1_short = qr/[a-f\d]{4,40}/;
  57my ($_stdin, $_help, $_edit,
  58        $_message, $_file,
  59        $_template, $_shared,
  60        $_version, $_fetch_all, $_no_rebase,
  61        $_merge, $_strategy, $_dry_run, $_local,
  62        $_prefix, $_no_checkout, $_verbose);
  63$Git::SVN::_follow_parent = 1;
  64my %remote_opts = ( 'username=s' => \$Git::SVN::Prompt::_username,
  65                    'config-dir=s' => \$Git::SVN::Ra::config_dir,
  66                    'no-auth-cache' => \$Git::SVN::Prompt::_no_auth_cache );
  67my %fc_opts = ( 'follow-parent|follow!' => \$Git::SVN::_follow_parent,
  68                'authors-file|A=s' => \$_authors,
  69                'repack:i' => \$Git::SVN::_repack,
  70                'noMetadata' => \$Git::SVN::_no_metadata,
  71                'useSvmProps' => \$Git::SVN::_use_svm_props,
  72                'useSvnsyncProps' => \$Git::SVN::_use_svnsync_props,
  73                'log-window-size=i' => \$Git::SVN::Ra::_log_window_size,
  74                'no-checkout' => \$_no_checkout,
  75                'quiet|q' => \$_q,
  76                'repack-flags|repack-args|repack-opts=s' =>
  77                   \$Git::SVN::_repack_flags,
  78                %remote_opts );
  79
  80my ($_trunk, $_tags, $_branches);
  81my %icv;
  82my %init_opts = ( 'template=s' => \$_template, 'shared:s' => \$_shared,
  83                  'trunk|T=s' => \$_trunk, 'tags|t=s' => \$_tags,
  84                  'branches|b=s' => \$_branches, 'prefix=s' => \$_prefix,
  85                  'minimize-url|m' => \$Git::SVN::_minimize_url,
  86                  'no-metadata' => sub { $icv{noMetadata} = 1 },
  87                  'use-svm-props' => sub { $icv{useSvmProps} = 1 },
  88                  'use-svnsync-props' => sub { $icv{useSvnsyncProps} = 1 },
  89                  'rewrite-root=s' => sub { $icv{rewriteRoot} = $_[1] },
  90                  %remote_opts );
  91my %cmt_opts = ( 'edit|e' => \$_edit,
  92                'rmdir' => \$SVN::Git::Editor::_rmdir,
  93                'find-copies-harder' => \$SVN::Git::Editor::_find_copies_harder,
  94                'l=i' => \$SVN::Git::Editor::_rename_limit,
  95                'copy-similarity|C=i'=> \$SVN::Git::Editor::_cp_similarity
  96);
  97
  98my %cmd = (
  99        fetch => [ \&cmd_fetch, "Download new revisions from SVN",
 100                        { 'revision|r=s' => \$_revision,
 101                          'fetch-all|all' => \$_fetch_all,
 102                           %fc_opts } ],
 103        clone => [ \&cmd_clone, "Initialize and fetch revisions",
 104                        { 'revision|r=s' => \$_revision,
 105                           %fc_opts, %init_opts } ],
 106        init => [ \&cmd_init, "Initialize a repo for tracking" .
 107                          " (requires URL argument)",
 108                          \%init_opts ],
 109        'multi-init' => [ \&cmd_multi_init,
 110                          "Deprecated alias for ".
 111                          "'$0 init -T<trunk> -b<branches> -t<tags>'",
 112                          \%init_opts ],
 113        dcommit => [ \&cmd_dcommit,
 114                     'Commit several diffs to merge with upstream',
 115                        { 'merge|m|M' => \$_merge,
 116                          'strategy|s=s' => \$_strategy,
 117                          'verbose|v' => \$_verbose,
 118                          'dry-run|n' => \$_dry_run,
 119                          'fetch-all|all' => \$_fetch_all,
 120                          'no-rebase' => \$_no_rebase,
 121                        %cmt_opts, %fc_opts } ],
 122        'set-tree' => [ \&cmd_set_tree,
 123                        "Set an SVN repository to a git tree-ish",
 124                        { 'stdin|' => \$_stdin, %cmt_opts, %fc_opts, } ],
 125        'show-ignore' => [ \&cmd_show_ignore, "Show svn:ignore listings",
 126                        { 'revision|r=i' => \$_revision } ],
 127        'multi-fetch' => [ \&cmd_multi_fetch,
 128                           "Deprecated alias for $0 fetch --all",
 129                           { 'revision|r=s' => \$_revision, %fc_opts } ],
 130        'migrate' => [ sub { },
 131                       # no-op, we automatically run this anyways,
 132                       'Migrate configuration/metadata/layout from
 133                        previous versions of git-svn',
 134                       { 'minimize' => \$Git::SVN::Migration::_minimize,
 135                         %remote_opts } ],
 136        'log' => [ \&Git::SVN::Log::cmd_show_log, 'Show commit logs',
 137                        { 'limit=i' => \$Git::SVN::Log::limit,
 138                          'revision|r=s' => \$_revision,
 139                          'verbose|v' => \$Git::SVN::Log::verbose,
 140                          'incremental' => \$Git::SVN::Log::incremental,
 141                          'oneline' => \$Git::SVN::Log::oneline,
 142                          'show-commit' => \$Git::SVN::Log::show_commit,
 143                          'non-recursive' => \$Git::SVN::Log::non_recursive,
 144                          'authors-file|A=s' => \$_authors,
 145                          'color' => \$Git::SVN::Log::color,
 146                          'pager=s' => \$Git::SVN::Log::pager,
 147                        } ],
 148        'find-rev' => [ \&cmd_find_rev, "Translate between SVN revision numbers and tree-ish",
 149                        { } ],
 150        'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
 151                        { 'merge|m|M' => \$_merge,
 152                          'verbose|v' => \$_verbose,
 153                          'strategy|s=s' => \$_strategy,
 154                          'local|l' => \$_local,
 155                          'fetch-all|all' => \$_fetch_all,
 156                          %fc_opts } ],
 157        'commit-diff' => [ \&cmd_commit_diff,
 158                           'Commit a diff between two trees',
 159                        { 'message|m=s' => \$_message,
 160                          'file|F=s' => \$_file,
 161                          'revision|r=s' => \$_revision,
 162                        %cmt_opts } ],
 163);
 164
 165my $cmd;
 166for (my $i = 0; $i < @ARGV; $i++) {
 167        if (defined $cmd{$ARGV[$i]}) {
 168                $cmd = $ARGV[$i];
 169                splice @ARGV, $i, 1;
 170                last;
 171        }
 172};
 173
 174my %opts = %{$cmd{$cmd}->[2]} if (defined $cmd);
 175
 176read_repo_config(\%opts);
 177Getopt::Long::Configure('pass_through') if ($cmd && $cmd eq 'log');
 178my $rv = GetOptions(%opts, 'help|H|h' => \$_help, 'version|V' => \$_version,
 179                    'minimize-connections' => \$Git::SVN::Migration::_minimize,
 180                    'id|i=s' => \$Git::SVN::default_ref_id,
 181                    'svn-remote|remote|R=s' => sub {
 182                       $Git::SVN::no_reuse_existing = 1;
 183                       $Git::SVN::default_repo_id = $_[1] });
 184exit 1 if (!$rv && $cmd && $cmd ne 'log');
 185
 186usage(0) if $_help;
 187version() if $_version;
 188usage(1) unless defined $cmd;
 189load_authors() if $_authors;
 190
 191# make sure we're always running
 192unless ($cmd =~ /(?:clone|init|multi-init)$/) {
 193        unless (-d $ENV{GIT_DIR}) {
 194                if ($git_dir_user_set) {
 195                        die "GIT_DIR=$ENV{GIT_DIR} explicitly set, ",
 196                            "but it is not a directory\n";
 197                }
 198                my $git_dir = delete $ENV{GIT_DIR};
 199                chomp(my $cdup = command_oneline(qw/rev-parse --show-cdup/));
 200                unless (length $cdup) {
 201                        die "Already at toplevel, but $git_dir ",
 202                            "not found '$cdup'\n";
 203                }
 204                chdir $cdup or die "Unable to chdir up to '$cdup'\n";
 205                unless (-d $git_dir) {
 206                        die "$git_dir still not found after going to ",
 207                            "'$cdup'\n";
 208                }
 209                $ENV{GIT_DIR} = $git_dir;
 210        }
 211}
 212unless ($cmd =~ /^(?:clone|init|multi-init|commit-diff)$/) {
 213        Git::SVN::Migration::migration_check();
 214}
 215Git::SVN::init_vars();
 216eval {
 217        Git::SVN::verify_remotes_sanity();
 218        $cmd{$cmd}->[0]->(@ARGV);
 219};
 220fatal $@ if $@;
 221post_fetch_checkout();
 222exit 0;
 223
 224####################### primary functions ######################
 225sub usage {
 226        my $exit = shift || 0;
 227        my $fd = $exit ? \*STDERR : \*STDOUT;
 228        print $fd <<"";
 229git-svn - bidirectional operations between a single Subversion tree and git
 230Usage: $0 <command> [options] [arguments]\n
 231
 232        print $fd "Available commands:\n" unless $cmd;
 233
 234        foreach (sort keys %cmd) {
 235                next if $cmd && $cmd ne $_;
 236                next if /^multi-/; # don't show deprecated commands
 237                print $fd '  ',pack('A17',$_),$cmd{$_}->[1],"\n";
 238                foreach (keys %{$cmd{$_}->[2]}) {
 239                        # mixed-case options are for .git/config only
 240                        next if /[A-Z]/ && /^[a-z]+$/i;
 241                        # prints out arguments as they should be passed:
 242                        my $x = s#[:=]s$## ? '<arg>' : s#[:=]i$## ? '<num>' : '';
 243                        print $fd ' ' x 21, join(', ', map { length $_ > 1 ?
 244                                                        "--$_" : "-$_" }
 245                                                split /\|/,$_)," $x\n";
 246                }
 247        }
 248        print $fd <<"";
 249\nGIT_SVN_ID may be set in the environment or via the --id/-i switch to an
 250arbitrary identifier if you're tracking multiple SVN branches/repositories in
 251one git repository and want to keep them separate.  See git-svn(1) for more
 252information.
 253
 254        exit $exit;
 255}
 256
 257sub version {
 258        print "git-svn version $VERSION (svn $SVN::Core::VERSION)\n";
 259        exit 0;
 260}
 261
 262sub do_git_init_db {
 263        unless (-d $ENV{GIT_DIR}) {
 264                my @init_db = ('init');
 265                push @init_db, "--template=$_template" if defined $_template;
 266                if (defined $_shared) {
 267                        if ($_shared =~ /[a-z]/) {
 268                                push @init_db, "--shared=$_shared";
 269                        } else {
 270                                push @init_db, "--shared";
 271                        }
 272                }
 273                command_noisy(@init_db);
 274        }
 275        my $set;
 276        my $pfx = "svn-remote.$Git::SVN::default_repo_id";
 277        foreach my $i (keys %icv) {
 278                die "'$set' and '$i' cannot both be set\n" if $set;
 279                next unless defined $icv{$i};
 280                command_noisy('config', "$pfx.$i", $icv{$i});
 281                $set = $i;
 282        }
 283}
 284
 285sub init_subdir {
 286        my $repo_path = shift or return;
 287        mkpath([$repo_path]) unless -d $repo_path;
 288        chdir $repo_path or die "Couldn't chdir to $repo_path: $!\n";
 289        $ENV{GIT_DIR} = '.git';
 290}
 291
 292sub cmd_clone {
 293        my ($url, $path) = @_;
 294        if (!defined $path &&
 295            (defined $_trunk || defined $_branches || defined $_tags) &&
 296            $url !~ m#^[a-z\+]+://#) {
 297                $path = $url;
 298        }
 299        $path = basename($url) if !defined $path || !length $path;
 300        cmd_init($url, $path);
 301        Git::SVN::fetch_all($Git::SVN::default_repo_id);
 302}
 303
 304sub cmd_init {
 305        if (defined $_trunk || defined $_branches || defined $_tags) {
 306                return cmd_multi_init(@_);
 307        }
 308        my $url = shift or die "SVN repository location required ",
 309                               "as a command-line argument\n";
 310        init_subdir(@_);
 311        do_git_init_db();
 312
 313        Git::SVN->init($url);
 314}
 315
 316sub cmd_fetch {
 317        if (grep /^\d+=./, @_) {
 318                die "'<rev>=<commit>' fetch arguments are ",
 319                    "no longer supported.\n";
 320        }
 321        my ($remote) = @_;
 322        if (@_ > 1) {
 323                die "Usage: $0 fetch [--all] [svn-remote]\n";
 324        }
 325        $remote ||= $Git::SVN::default_repo_id;
 326        if ($_fetch_all) {
 327                cmd_multi_fetch();
 328        } else {
 329                Git::SVN::fetch_all($remote, Git::SVN::read_all_remotes());
 330        }
 331}
 332
 333sub cmd_set_tree {
 334        my (@commits) = @_;
 335        if ($_stdin || !@commits) {
 336                print "Reading from stdin...\n";
 337                @commits = ();
 338                while (<STDIN>) {
 339                        if (/\b($sha1_short)\b/o) {
 340                                unshift @commits, $1;
 341                        }
 342                }
 343        }
 344        my @revs;
 345        foreach my $c (@commits) {
 346                my @tmp = command('rev-parse',$c);
 347                if (scalar @tmp == 1) {
 348                        push @revs, $tmp[0];
 349                } elsif (scalar @tmp > 1) {
 350                        push @revs, reverse(command('rev-list',@tmp));
 351                } else {
 352                        fatal "Failed to rev-parse $c\n";
 353                }
 354        }
 355        my $gs = Git::SVN->new;
 356        my ($r_last, $cmt_last) = $gs->last_rev_commit;
 357        $gs->fetch;
 358        if (defined $gs->{last_rev} && $r_last != $gs->{last_rev}) {
 359                fatal "There are new revisions that were fetched ",
 360                      "and need to be merged (or acknowledged) ",
 361                      "before committing.\nlast rev: $r_last\n",
 362                      " current: $gs->{last_rev}\n";
 363        }
 364        $gs->set_tree($_) foreach @revs;
 365        print "Done committing ",scalar @revs," revisions to SVN\n";
 366}
 367
 368sub cmd_dcommit {
 369        my $head = shift;
 370        $head ||= 'HEAD';
 371        my @refs;
 372        my ($url, $rev, $uuid, $gs) = working_head_info($head, \@refs);
 373        unless ($gs) {
 374                die "Unable to determine upstream SVN information from ",
 375                    "$head history\n";
 376        }
 377        my $c = $refs[-1];
 378        my $last_rev;
 379        foreach my $d (@refs) {
 380                if (!verify_ref("$d~1")) {
 381                        fatal "Commit $d\n",
 382                              "has no parent commit, and therefore ",
 383                              "nothing to diff against.\n",
 384                              "You should be working from a repository ",
 385                              "originally created by git-svn\n";
 386                }
 387                unless (defined $last_rev) {
 388                        (undef, $last_rev, undef) = cmt_metadata("$d~1");
 389                        unless (defined $last_rev) {
 390                                fatal "Unable to extract revision information ",
 391                                      "from commit $d~1\n";
 392                        }
 393                }
 394                if ($_dry_run) {
 395                        print "diff-tree $d~1 $d\n";
 396                } else {
 397                        my %ed_opts = ( r => $last_rev,
 398                                        log => get_commit_entry($d)->{log},
 399                                        ra => Git::SVN::Ra->new($gs->full_url),
 400                                        tree_a => "$d~1",
 401                                        tree_b => $d,
 402                                        editor_cb => sub {
 403                                               print "Committed r$_[0]\n";
 404                                               $last_rev = $_[0]; },
 405                                        svn_path => '');
 406                        if (!SVN::Git::Editor->new(\%ed_opts)->apply_diff) {
 407                                print "No changes\n$d~1 == $d\n";
 408                        }
 409                }
 410        }
 411        return if $_dry_run;
 412        unless ($gs) {
 413                warn "Could not determine fetch information for $url\n",
 414                     "Will not attempt to fetch and rebase commits.\n",
 415                     "This probably means you have useSvmProps and should\n",
 416                     "now resync your SVN::Mirror repository.\n";
 417                return;
 418        }
 419        $_fetch_all ? $gs->fetch_all : $gs->fetch;
 420        unless ($_no_rebase) {
 421                # we always want to rebase against the current HEAD, not any
 422                # head that was passed to us
 423                my @diff = command('diff-tree', 'HEAD', $gs->refname, '--');
 424                my @finish;
 425                if (@diff) {
 426                        @finish = rebase_cmd();
 427                        print STDERR "W: HEAD and ", $gs->refname, " differ, ",
 428                                     "using @finish:\n", "@diff";
 429                } else {
 430                        print "No changes between current HEAD and ",
 431                              $gs->refname, "\nResetting to the latest ",
 432                              $gs->refname, "\n";
 433                        @finish = qw/reset --mixed/;
 434                }
 435                command_noisy(@finish, $gs->refname);
 436        }
 437}
 438
 439sub cmd_find_rev {
 440        my $revision_or_hash = shift;
 441        my $result;
 442        if ($revision_or_hash =~ /^r\d+$/) {
 443                my $head = shift;
 444                $head ||= 'HEAD';
 445                my @refs;
 446                my (undef, undef, undef, $gs) = working_head_info($head, \@refs);
 447                unless ($gs) {
 448                        die "Unable to determine upstream SVN information from ",
 449                            "$head history\n";
 450                }
 451                my $desired_revision = substr($revision_or_hash, 1);
 452                $result = $gs->rev_db_get($desired_revision);
 453        } else {
 454                my (undef, $rev, undef) = cmt_metadata($revision_or_hash);
 455                $result = $rev;
 456        }
 457        print "$result\n" if $result;
 458}
 459
 460sub cmd_rebase {
 461        command_noisy(qw/update-index --refresh/);
 462        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
 463        unless ($gs) {
 464                die "Unable to determine upstream SVN information from ",
 465                    "working tree history\n";
 466        }
 467        if (command(qw/diff-index HEAD --/)) {
 468                print STDERR "Cannot rebase with uncommited changes:\n";
 469                command_noisy('status');
 470                exit 1;
 471        }
 472        unless ($_local) {
 473                $_fetch_all ? $gs->fetch_all : $gs->fetch;
 474        }
 475        command_noisy(rebase_cmd(), $gs->refname);
 476}
 477
 478sub cmd_show_ignore {
 479        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
 480        $gs ||= Git::SVN->new;
 481        my $r = (defined $_revision ? $_revision : $gs->ra->get_latest_revnum);
 482        $gs->traverse_ignore(\*STDOUT, $gs->{path}, $r);
 483}
 484
 485sub cmd_multi_init {
 486        my $url = shift;
 487        unless (defined $_trunk || defined $_branches || defined $_tags) {
 488                usage(1);
 489        }
 490
 491        # there are currently some bugs that prevent multi-init/multi-fetch
 492        # setups from working well without this.
 493        $Git::SVN::_minimize_url = 1;
 494
 495        $_prefix = '' unless defined $_prefix;
 496        if (defined $url) {
 497                $url =~ s#/+$##;
 498                init_subdir(@_);
 499        }
 500        do_git_init_db();
 501        if (defined $_trunk) {
 502                my $trunk_ref = $_prefix . 'trunk';
 503                # try both old-style and new-style lookups:
 504                my $gs_trunk = eval { Git::SVN->new($trunk_ref) };
 505                unless ($gs_trunk) {
 506                        my ($trunk_url, $trunk_path) =
 507                                              complete_svn_url($url, $_trunk);
 508                        $gs_trunk = Git::SVN->init($trunk_url, $trunk_path,
 509                                                   undef, $trunk_ref);
 510                }
 511        }
 512        return unless defined $_branches || defined $_tags;
 513        my $ra = $url ? Git::SVN::Ra->new($url) : undef;
 514        complete_url_ls_init($ra, $_branches, '--branches/-b', $_prefix);
 515        complete_url_ls_init($ra, $_tags, '--tags/-t', $_prefix . 'tags/');
 516}
 517
 518sub cmd_multi_fetch {
 519        my $remotes = Git::SVN::read_all_remotes();
 520        foreach my $repo_id (sort keys %$remotes) {
 521                if ($remotes->{$repo_id}->{url}) {
 522                        Git::SVN::fetch_all($repo_id, $remotes);
 523                }
 524        }
 525}
 526
 527# this command is special because it requires no metadata
 528sub cmd_commit_diff {
 529        my ($ta, $tb, $url) = @_;
 530        my $usage = "Usage: $0 commit-diff -r<revision> ".
 531                    "<tree-ish> <tree-ish> [<URL>]\n";
 532        fatal($usage) if (!defined $ta || !defined $tb);
 533        my $svn_path;
 534        if (!defined $url) {
 535                my $gs = eval { Git::SVN->new };
 536                if (!$gs) {
 537                        fatal("Needed URL or usable git-svn --id in ",
 538                              "the command-line\n", $usage);
 539                }
 540                $url = $gs->{url};
 541                $svn_path = $gs->{path};
 542        }
 543        unless (defined $_revision) {
 544                fatal("-r|--revision is a required argument\n", $usage);
 545        }
 546        if (defined $_message && defined $_file) {
 547                fatal("Both --message/-m and --file/-F specified ",
 548                      "for the commit message.\n",
 549                      "I have no idea what you mean\n");
 550        }
 551        if (defined $_file) {
 552                $_message = file_to_s($_file);
 553        } else {
 554                $_message ||= get_commit_entry($tb)->{log};
 555        }
 556        my $ra ||= Git::SVN::Ra->new($url);
 557        $svn_path ||= $ra->{svn_path};
 558        my $r = $_revision;
 559        if ($r eq 'HEAD') {
 560                $r = $ra->get_latest_revnum;
 561        } elsif ($r !~ /^\d+$/) {
 562                die "revision argument: $r not understood by git-svn\n";
 563        }
 564        my %ed_opts = ( r => $r,
 565                        log => $_message,
 566                        ra => $ra,
 567                        tree_a => $ta,
 568                        tree_b => $tb,
 569                        editor_cb => sub { print "Committed r$_[0]\n" },
 570                        svn_path => $svn_path );
 571        if (!SVN::Git::Editor->new(\%ed_opts)->apply_diff) {
 572                print "No changes\n$ta == $tb\n";
 573        }
 574}
 575
 576########################### utility functions #########################
 577
 578sub rebase_cmd {
 579        my @cmd = qw/rebase/;
 580        push @cmd, '-v' if $_verbose;
 581        push @cmd, qw/--merge/ if $_merge;
 582        push @cmd, "--strategy=$_strategy" if $_strategy;
 583        @cmd;
 584}
 585
 586sub post_fetch_checkout {
 587        return if $_no_checkout;
 588        my $gs = $Git::SVN::_head or return;
 589        return if verify_ref('refs/heads/master^0');
 590
 591        my $valid_head = verify_ref('HEAD^0');
 592        command_noisy(qw(update-ref refs/heads/master), $gs->refname);
 593        return if ($valid_head || !verify_ref('HEAD^0'));
 594
 595        return if $ENV{GIT_DIR} !~ m#^(?:.*/)?\.git$#;
 596        my $index = $ENV{GIT_INDEX_FILE} || "$ENV{GIT_DIR}/index";
 597        return if -f $index;
 598
 599        return if command_oneline(qw/rev-parse --is-inside-work-tree/) eq 'false';
 600        return if command_oneline(qw/rev-parse --is-inside-git-dir/) eq 'true';
 601        command_noisy(qw/read-tree -m -u -v HEAD HEAD/);
 602        print STDERR "Checked out HEAD:\n  ",
 603                     $gs->full_url, " r", $gs->last_rev, "\n";
 604}
 605
 606sub complete_svn_url {
 607        my ($url, $path) = @_;
 608        $path =~ s#/+$##;
 609        if ($path !~ m#^[a-z\+]+://#) {
 610                if (!defined $url || $url !~ m#^[a-z\+]+://#) {
 611                        fatal("E: '$path' is not a complete URL ",
 612                              "and a separate URL is not specified\n");
 613                }
 614                return ($url, $path);
 615        }
 616        return ($path, '');
 617}
 618
 619sub complete_url_ls_init {
 620        my ($ra, $repo_path, $switch, $pfx) = @_;
 621        unless ($repo_path) {
 622                print STDERR "W: $switch not specified\n";
 623                return;
 624        }
 625        $repo_path =~ s#/+$##;
 626        if ($repo_path =~ m#^[a-z\+]+://#) {
 627                $ra = Git::SVN::Ra->new($repo_path);
 628                $repo_path = '';
 629        } else {
 630                $repo_path =~ s#^/+##;
 631                unless ($ra) {
 632                        fatal("E: '$repo_path' is not a complete URL ",
 633                              "and a separate URL is not specified\n");
 634                }
 635        }
 636        my $url = $ra->{url};
 637        my $gs = Git::SVN->init($url, undef, undef, undef, 1);
 638        my $k = "svn-remote.$gs->{repo_id}.url";
 639        my $orig_url = eval { command_oneline(qw/config --get/, $k) };
 640        if ($orig_url && ($orig_url ne $gs->{url})) {
 641                die "$k already set: $orig_url\n",
 642                    "wanted to set to: $gs->{url}\n";
 643        }
 644        command_oneline('config', $k, $gs->{url}) unless $orig_url;
 645        my $remote_path = "$ra->{svn_path}/$repo_path/*";
 646        $remote_path =~ s#/+#/#g;
 647        $remote_path =~ s#^/##g;
 648        my ($n) = ($switch =~ /^--(\w+)/);
 649        if (length $pfx && $pfx !~ m#/$#) {
 650                die "--prefix='$pfx' must have a trailing slash '/'\n";
 651        }
 652        command_noisy('config', "svn-remote.$gs->{repo_id}.$n",
 653                                "$remote_path:refs/remotes/$pfx*");
 654}
 655
 656sub verify_ref {
 657        my ($ref) = @_;
 658        eval { command_oneline([ 'rev-parse', '--verify', $ref ],
 659                               { STDERR => 0 }); };
 660}
 661
 662sub get_tree_from_treeish {
 663        my ($treeish) = @_;
 664        # $treeish can be a symbolic ref, too:
 665        my $type = command_oneline(qw/cat-file -t/, $treeish);
 666        my $expected;
 667        while ($type eq 'tag') {
 668                ($treeish, $type) = command(qw/cat-file tag/, $treeish);
 669        }
 670        if ($type eq 'commit') {
 671                $expected = (grep /^tree /, command(qw/cat-file commit/,
 672                                                    $treeish))[0];
 673                ($expected) = ($expected =~ /^tree ($sha1)$/o);
 674                die "Unable to get tree from $treeish\n" unless $expected;
 675        } elsif ($type eq 'tree') {
 676                $expected = $treeish;
 677        } else {
 678                die "$treeish is a $type, expected tree, tag or commit\n";
 679        }
 680        return $expected;
 681}
 682
 683sub get_commit_entry {
 684        my ($treeish) = shift;
 685        my %log_entry = ( log => '', tree => get_tree_from_treeish($treeish) );
 686        my $commit_editmsg = "$ENV{GIT_DIR}/COMMIT_EDITMSG";
 687        my $commit_msg = "$ENV{GIT_DIR}/COMMIT_MSG";
 688        open my $log_fh, '>', $commit_editmsg or croak $!;
 689
 690        my $type = command_oneline(qw/cat-file -t/, $treeish);
 691        if ($type eq 'commit' || $type eq 'tag') {
 692                my ($msg_fh, $ctx) = command_output_pipe('cat-file',
 693                                                         $type, $treeish);
 694                my $in_msg = 0;
 695                while (<$msg_fh>) {
 696                        if (!$in_msg) {
 697                                $in_msg = 1 if (/^\s*$/);
 698                        } elsif (/^git-svn-id: /) {
 699                                # skip this for now, we regenerate the
 700                                # correct one on re-fetch anyways
 701                                # TODO: set *:merge properties or like...
 702                        } else {
 703                                print $log_fh $_ or croak $!;
 704                        }
 705                }
 706                command_close_pipe($msg_fh, $ctx);
 707        }
 708        close $log_fh or croak $!;
 709
 710        if ($_edit || ($type eq 'tree')) {
 711                my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi';
 712                # TODO: strip out spaces, comments, like git-commit.sh
 713                system($editor, $commit_editmsg);
 714        }
 715        rename $commit_editmsg, $commit_msg or croak $!;
 716        open $log_fh, '<', $commit_msg or croak $!;
 717        { local $/; chomp($log_entry{log} = <$log_fh>); }
 718        close $log_fh or croak $!;
 719        unlink $commit_msg;
 720        \%log_entry;
 721}
 722
 723sub s_to_file {
 724        my ($str, $file, $mode) = @_;
 725        open my $fd,'>',$file or croak $!;
 726        print $fd $str,"\n" or croak $!;
 727        close $fd or croak $!;
 728        chmod ($mode &~ umask, $file) if (defined $mode);
 729}
 730
 731sub file_to_s {
 732        my $file = shift;
 733        open my $fd,'<',$file or croak "$!: file: $file\n";
 734        local $/;
 735        my $ret = <$fd>;
 736        close $fd or croak $!;
 737        $ret =~ s/\s*$//s;
 738        return $ret;
 739}
 740
 741# '<svn username> = real-name <email address>' mapping based on git-svnimport:
 742sub load_authors {
 743        open my $authors, '<', $_authors or die "Can't open $_authors $!\n";
 744        my $log = $cmd eq 'log';
 745        while (<$authors>) {
 746                chomp;
 747                next unless /^(\S+?|\(no author\))\s*=\s*(.+?)\s*<(.+)>\s*$/;
 748                my ($user, $name, $email) = ($1, $2, $3);
 749                if ($log) {
 750                        $Git::SVN::Log::rusers{"$name <$email>"} = $user;
 751                } else {
 752                        $users{$user} = [$name, $email];
 753                }
 754        }
 755        close $authors or croak $!;
 756}
 757
 758# convert GetOpt::Long specs for use by git-config
 759sub read_repo_config {
 760        return unless -d $ENV{GIT_DIR};
 761        my $opts = shift;
 762        my @config_only;
 763        foreach my $o (keys %$opts) {
 764                # if we have mixedCase and a long option-only, then
 765                # it's a config-only variable that we don't need for
 766                # the command-line.
 767                push @config_only, $o if ($o =~ /[A-Z]/ && $o =~ /^[a-z]+$/i);
 768                my $v = $opts->{$o};
 769                my ($key) = ($o =~ /^([a-zA-Z\-]+)/);
 770                $key =~ s/-//g;
 771                my $arg = 'git-config';
 772                $arg .= ' --int' if ($o =~ /[:=]i$/);
 773                $arg .= ' --bool' if ($o !~ /[:=][sfi]$/);
 774                if (ref $v eq 'ARRAY') {
 775                        chomp(my @tmp = `$arg --get-all svn.$key`);
 776                        @$v = @tmp if @tmp;
 777                } else {
 778                        chomp(my $tmp = `$arg --get svn.$key`);
 779                        if ($tmp && !($arg =~ / --bool/ && $tmp eq 'false')) {
 780                                $$v = $tmp;
 781                        }
 782                }
 783        }
 784        delete @$opts{@config_only} if @config_only;
 785}
 786
 787sub extract_metadata {
 788        my $id = shift or return (undef, undef, undef);
 789        my ($url, $rev, $uuid) = ($id =~ /^\s*git-svn-id:\s+(.*)\@(\d+)
 790                                                        \s([a-f\d\-]+)$/x);
 791        if (!defined $rev || !$uuid || !$url) {
 792                # some of the original repositories I made had
 793                # identifiers like this:
 794                ($rev, $uuid) = ($id =~/^\s*git-svn-id:\s(\d+)\@([a-f\d\-]+)/);
 795        }
 796        return ($url, $rev, $uuid);
 797}
 798
 799sub cmt_metadata {
 800        return extract_metadata((grep(/^git-svn-id: /,
 801                command(qw/cat-file commit/, shift)))[-1]);
 802}
 803
 804sub working_head_info {
 805        my ($head, $refs) = @_;
 806        my ($fh, $ctx) = command_output_pipe('log', $head);
 807        my $hash;
 808        my %max;
 809        while (<$fh>) {
 810                if ( m{^commit ($::sha1)$} ) {
 811                        unshift @$refs, $hash if $hash and $refs;
 812                        $hash = $1;
 813                        next;
 814                }
 815                next unless s{^\s*(git-svn-id:)}{$1};
 816                my ($url, $rev, $uuid) = extract_metadata($_);
 817                if (defined $url && defined $rev) {
 818                        next if $max{$url} and $max{$url} < $rev;
 819                        if (my $gs = Git::SVN->find_by_url($url)) {
 820                                my $c = $gs->rev_db_get($rev);
 821                                if ($c && $c eq $hash) {
 822                                        close $fh; # break the pipe
 823                                        return ($url, $rev, $uuid, $gs);
 824                                } else {
 825                                        $max{$url} ||= $gs->rev_db_max;
 826                                }
 827                        }
 828                }
 829        }
 830        command_close_pipe($fh, $ctx);
 831        (undef, undef, undef, undef);
 832}
 833
 834package Git::SVN;
 835use strict;
 836use warnings;
 837use vars qw/$default_repo_id $default_ref_id $_no_metadata $_follow_parent
 838            $_repack $_repack_flags $_use_svm_props $_head
 839            $_use_svnsync_props $no_reuse_existing $_minimize_url/;
 840use Carp qw/croak/;
 841use File::Path qw/mkpath/;
 842use File::Copy qw/copy/;
 843use IPC::Open3;
 844
 845my $_repack_nr;
 846# properties that we do not log:
 847my %SKIP_PROP;
 848BEGIN {
 849        %SKIP_PROP = map { $_ => 1 } qw/svn:wc:ra_dav:version-url
 850                                        svn:special svn:executable
 851                                        svn:entry:committed-rev
 852                                        svn:entry:last-author
 853                                        svn:entry:uuid
 854                                        svn:entry:committed-date/;
 855
 856        # some options are read globally, but can be overridden locally
 857        # per [svn-remote "..."] section.  Command-line options will *NOT*
 858        # override options set in an [svn-remote "..."] section
 859        no strict 'refs';
 860        for my $option (qw/follow_parent no_metadata use_svm_props
 861                           use_svnsync_props/) {
 862                my $key = $option;
 863                $key =~ tr/_//d;
 864                my $prop = "-$option";
 865                *$option = sub {
 866                        my ($self) = @_;
 867                        return $self->{$prop} if exists $self->{$prop};
 868                        my $k = "svn-remote.$self->{repo_id}.$key";
 869                        eval { command_oneline(qw/config --get/, $k) };
 870                        if ($@) {
 871                                $self->{$prop} = ${"Git::SVN::_$option"};
 872                        } else {
 873                                my $v = command_oneline(qw/config --bool/,$k);
 874                                $self->{$prop} = $v eq 'false' ? 0 : 1;
 875                        }
 876                        return $self->{$prop};
 877                }
 878        }
 879}
 880
 881my %LOCKFILES;
 882END { unlink keys %LOCKFILES if %LOCKFILES }
 883
 884sub resolve_local_globs {
 885        my ($url, $fetch, $glob_spec) = @_;
 886        return unless defined $glob_spec;
 887        my $ref = $glob_spec->{ref};
 888        my $path = $glob_spec->{path};
 889        foreach (command(qw#for-each-ref --format=%(refname) refs/remotes#)) {
 890                next unless m#^refs/remotes/$ref->{regex}$#;
 891                my $p = $1;
 892                my $pathname = $path->full_path($p);
 893                my $refname = $ref->full_path($p);
 894                if (my $existing = $fetch->{$pathname}) {
 895                        if ($existing ne $refname) {
 896                                die "Refspec conflict:\n",
 897                                    "existing: refs/remotes/$existing\n",
 898                                    " globbed: refs/remotes/$refname\n";
 899                        }
 900                        my $u = (::cmt_metadata("refs/remotes/$refname"))[0];
 901                        $u =~ s!^\Q$url\E(/|$)!! or die
 902                          "refs/remotes/$refname: '$url' not found in '$u'\n";
 903                        if ($pathname ne $u) {
 904                                warn "W: Refspec glob conflict ",
 905                                     "(ref: refs/remotes/$refname):\n",
 906                                     "expected path: $pathname\n",
 907                                     "    real path: $u\n",
 908                                     "Continuing ahead with $u\n";
 909                                next;
 910                        }
 911                } else {
 912                        $fetch->{$pathname} = $refname;
 913                }
 914        }
 915}
 916
 917sub parse_revision_argument {
 918        my ($base, $head) = @_;
 919        if (!defined $::_revision || $::_revision eq 'BASE:HEAD') {
 920                return ($base, $head);
 921        }
 922        return ($1, $2) if ($::_revision =~ /^(\d+):(\d+)$/);
 923        return ($::_revision, $::_revision) if ($::_revision =~ /^\d+$/);
 924        return ($head, $head) if ($::_revision eq 'HEAD');
 925        return ($base, $1) if ($::_revision =~ /^BASE:(\d+)$/);
 926        return ($1, $head) if ($::_revision =~ /^(\d+):HEAD$/);
 927        die "revision argument: $::_revision not understood by git-svn\n";
 928}
 929
 930sub fetch_all {
 931        my ($repo_id, $remotes) = @_;
 932        if (ref $repo_id) {
 933                my $gs = $repo_id;
 934                $repo_id = undef;
 935                $repo_id = $gs->{repo_id};
 936        }
 937        $remotes ||= read_all_remotes();
 938        my $remote = $remotes->{$repo_id} or
 939                     die "[svn-remote \"$repo_id\"] unknown\n";
 940        my $fetch = $remote->{fetch};
 941        my $url = $remote->{url} or die "svn-remote.$repo_id.url not defined\n";
 942        my (@gs, @globs);
 943        my $ra = Git::SVN::Ra->new($url);
 944        my $uuid = $ra->get_uuid;
 945        my $head = $ra->get_latest_revnum;
 946        my $base = defined $fetch ? $head : 0;
 947
 948        # read the max revs for wildcard expansion (branches/*, tags/*)
 949        foreach my $t (qw/branches tags/) {
 950                defined $remote->{$t} or next;
 951                push @globs, $remote->{$t};
 952                my $max_rev = eval { tmp_config(qw/--int --get/,
 953                                         "svn-remote.$repo_id.${t}-maxRev") };
 954                if (defined $max_rev && ($max_rev < $base)) {
 955                        $base = $max_rev;
 956                } elsif (!defined $max_rev) {
 957                        $base = 0;
 958                }
 959        }
 960
 961        if ($fetch) {
 962                foreach my $p (sort keys %$fetch) {
 963                        my $gs = Git::SVN->new($fetch->{$p}, $repo_id, $p);
 964                        my $lr = $gs->rev_db_max;
 965                        if (defined $lr) {
 966                                $base = $lr if ($lr < $base);
 967                        }
 968                        push @gs, $gs;
 969                }
 970        }
 971
 972        ($base, $head) = parse_revision_argument($base, $head);
 973        $ra->gs_fetch_loop_common($base, $head, \@gs, \@globs);
 974}
 975
 976sub read_all_remotes {
 977        my $r = {};
 978        foreach (grep { s/^svn-remote\.// } command(qw/config -l/)) {
 979                if (m!^(.+)\.fetch=\s*(.*)\s*:\s*refs/remotes/(.+)\s*$!) {
 980                        $r->{$1}->{fetch}->{$2} = $3;
 981                } elsif (m!^(.+)\.url=\s*(.*)\s*$!) {
 982                        $r->{$1}->{url} = $2;
 983                } elsif (m!^(.+)\.(branches|tags)=
 984                           (.*):refs/remotes/(.+)\s*$/!x) {
 985                        my ($p, $g) = ($3, $4);
 986                        my $rs = $r->{$1}->{$2} = {
 987                                          t => $2,
 988                                          remote => $1,
 989                                          path => Git::SVN::GlobSpec->new($p),
 990                                          ref => Git::SVN::GlobSpec->new($g) };
 991                        if (length($rs->{ref}->{right}) != 0) {
 992                                die "The '*' glob character must be the last ",
 993                                    "character of '$g'\n";
 994                        }
 995                }
 996        }
 997        $r;
 998}
 999
1000sub init_vars {
1001        if (defined $_repack) {
1002                $_repack = 1000 if ($_repack <= 0);
1003                $_repack_nr = $_repack;
1004                $_repack_flags ||= '-d';
1005        }
1006}
1007
1008sub verify_remotes_sanity {
1009        return unless -d $ENV{GIT_DIR};
1010        my %seen;
1011        foreach (command(qw/config -l/)) {
1012                if (m!^svn-remote\.(?:.+)\.fetch=.*:refs/remotes/(\S+)\s*$!) {
1013                        if ($seen{$1}) {
1014                                die "Remote ref refs/remote/$1 is tracked by",
1015                                    "\n  \"$_\"\nand\n  \"$seen{$1}\"\n",
1016                                    "Please resolve this ambiguity in ",
1017                                    "your git configuration file before ",
1018                                    "continuing\n";
1019                        }
1020                        $seen{$1} = $_;
1021                }
1022        }
1023}
1024
1025# we allow more chars than remotes2config.sh...
1026sub sanitize_remote_name {
1027        my ($name) = @_;
1028        $name =~ tr{A-Za-z0-9:,/+-}{.}c;
1029        $name;
1030}
1031
1032sub find_existing_remote {
1033        my ($url, $remotes) = @_;
1034        return undef if $no_reuse_existing;
1035        my $existing;
1036        foreach my $repo_id (keys %$remotes) {
1037                my $u = $remotes->{$repo_id}->{url} or next;
1038                next if $u ne $url;
1039                $existing = $repo_id;
1040                last;
1041        }
1042        $existing;
1043}
1044
1045sub init_remote_config {
1046        my ($self, $url, $no_write) = @_;
1047        $url =~ s!/+$!!; # strip trailing slash
1048        my $r = read_all_remotes();
1049        my $existing = find_existing_remote($url, $r);
1050        if ($existing) {
1051                unless ($no_write) {
1052                        print STDERR "Using existing ",
1053                                     "[svn-remote \"$existing\"]\n";
1054                }
1055                $self->{repo_id} = $existing;
1056        } elsif ($_minimize_url) {
1057                my $min_url = Git::SVN::Ra->new($url)->minimize_url;
1058                $existing = find_existing_remote($min_url, $r);
1059                if ($existing) {
1060                        unless ($no_write) {
1061                                print STDERR "Using existing ",
1062                                             "[svn-remote \"$existing\"]\n";
1063                        }
1064                        $self->{repo_id} = $existing;
1065                }
1066                if ($min_url ne $url) {
1067                        unless ($no_write) {
1068                                print STDERR "Using higher level of URL: ",
1069                                             "$url => $min_url\n";
1070                        }
1071                        my $old_path = $self->{path};
1072                        $self->{path} = $url;
1073                        $self->{path} =~ s!^\Q$min_url\E(/|$)!!;
1074                        if (length $old_path) {
1075                                $self->{path} .= "/$old_path";
1076                        }
1077                        $url = $min_url;
1078                }
1079        }
1080        my $orig_url;
1081        if (!$existing) {
1082                # verify that we aren't overwriting anything:
1083                $orig_url = eval {
1084                        command_oneline('config', '--get',
1085                                        "svn-remote.$self->{repo_id}.url")
1086                };
1087                if ($orig_url && ($orig_url ne $url)) {
1088                        die "svn-remote.$self->{repo_id}.url already set: ",
1089                            "$orig_url\nwanted to set to: $url\n";
1090                }
1091        }
1092        my ($xrepo_id, $xpath) = find_ref($self->refname);
1093        if (defined $xpath) {
1094                die "svn-remote.$xrepo_id.fetch already set to track ",
1095                    "$xpath:refs/remotes/", $self->refname, "\n";
1096        }
1097        unless ($no_write) {
1098                command_noisy('config',
1099                              "svn-remote.$self->{repo_id}.url", $url);
1100                command_noisy('config', '--add',
1101                              "svn-remote.$self->{repo_id}.fetch",
1102                              "$self->{path}:".$self->refname);
1103        }
1104        $self->{url} = $url;
1105}
1106
1107sub find_by_url { # repos_root and, path are optional
1108        my ($class, $full_url, $repos_root, $path) = @_;
1109
1110        return undef unless defined $full_url;
1111        remove_username($full_url);
1112        remove_username($repos_root) if defined $repos_root;
1113        my $remotes = read_all_remotes();
1114        if (defined $full_url && defined $repos_root && !defined $path) {
1115                $path = $full_url;
1116                $path =~ s#^\Q$repos_root\E(?:/|$)##;
1117        }
1118        foreach my $repo_id (keys %$remotes) {
1119                my $u = $remotes->{$repo_id}->{url} or next;
1120                remove_username($u);
1121                next if defined $repos_root && $repos_root ne $u;
1122
1123                my $fetch = $remotes->{$repo_id}->{fetch} || {};
1124                foreach (qw/branches tags/) {
1125                        resolve_local_globs($u, $fetch,
1126                                            $remotes->{$repo_id}->{$_});
1127                }
1128                my $p = $path;
1129                unless (defined $p) {
1130                        $p = $full_url;
1131                        $p =~ s#^\Q$u\E(?:/|$)## or next;
1132                }
1133                foreach my $f (keys %$fetch) {
1134                        next if $f ne $p;
1135                        return Git::SVN->new($fetch->{$f}, $repo_id, $f);
1136                }
1137        }
1138        undef;
1139}
1140
1141sub init {
1142        my ($class, $url, $path, $repo_id, $ref_id, $no_write) = @_;
1143        my $self = _new($class, $repo_id, $ref_id, $path);
1144        if (defined $url) {
1145                $self->init_remote_config($url, $no_write);
1146        }
1147        $self;
1148}
1149
1150sub find_ref {
1151        my ($ref_id) = @_;
1152        foreach (command(qw/config -l/)) {
1153                next unless m!^svn-remote\.(.+)\.fetch=
1154                              \s*(.*)\s*:\s*refs/remotes/(.+)\s*$!x;
1155                my ($repo_id, $path, $ref) = ($1, $2, $3);
1156                if ($ref eq $ref_id) {
1157                        $path = '' if ($path =~ m#^\./?#);
1158                        return ($repo_id, $path);
1159                }
1160        }
1161        (undef, undef, undef);
1162}
1163
1164sub new {
1165        my ($class, $ref_id, $repo_id, $path) = @_;
1166        if (defined $ref_id && !defined $repo_id && !defined $path) {
1167                ($repo_id, $path) = find_ref($ref_id);
1168                if (!defined $repo_id) {
1169                        die "Could not find a \"svn-remote.*.fetch\" key ",
1170                            "in the repository configuration matching: ",
1171                            "refs/remotes/$ref_id\n";
1172                }
1173        }
1174        my $self = _new($class, $repo_id, $ref_id, $path);
1175        if (!defined $self->{path} || !length $self->{path}) {
1176                my $fetch = command_oneline('config', '--get',
1177                                            "svn-remote.$repo_id.fetch",
1178                                            ":refs/remotes/$ref_id\$") or
1179                     die "Failed to read \"svn-remote.$repo_id.fetch\" ",
1180                         "\":refs/remotes/$ref_id\$\" in config\n";
1181                ($self->{path}, undef) = split(/\s*:\s*/, $fetch);
1182        }
1183        $self->{url} = command_oneline('config', '--get',
1184                                       "svn-remote.$repo_id.url") or
1185                  die "Failed to read \"svn-remote.$repo_id.url\" in config\n";
1186        $self->rebuild;
1187        $self;
1188}
1189
1190sub refname { "refs/remotes/$_[0]->{ref_id}" }
1191
1192sub svm_uuid {
1193        my ($self) = @_;
1194        return $self->{svm}->{uuid} if $self->svm;
1195        $self->ra;
1196        unless ($self->{svm}) {
1197                die "SVM UUID not cached, and reading remotely failed\n";
1198        }
1199        $self->{svm}->{uuid};
1200}
1201
1202sub svm {
1203        my ($self) = @_;
1204        return $self->{svm} if $self->{svm};
1205        my $svm;
1206        # see if we have it in our config, first:
1207        eval {
1208                my $section = "svn-remote.$self->{repo_id}";
1209                $svm = {
1210                  source => tmp_config('--get', "$section.svm-source"),
1211                  uuid => tmp_config('--get', "$section.svm-uuid"),
1212                  replace => tmp_config('--get', "$section.svm-replace"),
1213                }
1214        };
1215        if ($svm && $svm->{source} && $svm->{uuid} && $svm->{replace}) {
1216                $self->{svm} = $svm;
1217        }
1218        $self->{svm};
1219}
1220
1221sub _set_svm_vars {
1222        my ($self, $ra) = @_;
1223        return $ra if $self->svm;
1224
1225        my @err = ( "useSvmProps set, but failed to read SVM properties\n",
1226                    "(svm:source, svm:uuid) ",
1227                    "from the following URLs:\n" );
1228        sub read_svm_props {
1229                my ($self, $ra, $path, $r) = @_;
1230                my $props = ($ra->get_dir($path, $r))[2];
1231                my $src = $props->{'svm:source'};
1232                my $uuid = $props->{'svm:uuid'};
1233                return undef if (!$src || !$uuid);
1234
1235                chomp($src, $uuid);
1236
1237                $uuid =~ m{^[0-9a-f\-]{30,}$}
1238                    or die "doesn't look right - svm:uuid is '$uuid'\n";
1239
1240                # the '!' is used to mark the repos_root!/relative/path
1241                $src =~ s{/?!/?}{/};
1242                $src =~ s{/+$}{}; # no trailing slashes please
1243                # username is of no interest
1244                $src =~ s{(^[a-z\+]*://)[^/@]*@}{$1};
1245
1246                my $replace = $ra->{url};
1247                $replace .= "/$path" if length $path;
1248
1249                my $section = "svn-remote.$self->{repo_id}";
1250                tmp_config("$section.svm-source", $src);
1251                tmp_config("$section.svm-replace", $replace);
1252                tmp_config("$section.svm-uuid", $uuid);
1253                $self->{svm} = {
1254                        source => $src,
1255                        uuid => $uuid,
1256                        replace => $replace
1257                };
1258        }
1259
1260        my $r = $ra->get_latest_revnum;
1261        my $path = $self->{path};
1262        my %tried;
1263        while (length $path) {
1264                unless ($tried{"$self->{url}/$path"}) {
1265                        return $ra if $self->read_svm_props($ra, $path, $r);
1266                        $tried{"$self->{url}/$path"} = 1;
1267                }
1268                $path =~ s#/?[^/]+$##;
1269        }
1270        die "Path: '$path' should be ''\n" if $path ne '';
1271        return $ra if $self->read_svm_props($ra, $path, $r);
1272        $tried{"$self->{url}/$path"} = 1;
1273
1274        if ($ra->{repos_root} eq $self->{url}) {
1275                die @err, (map { "  $_\n" } keys %tried), "\n";
1276        }
1277
1278        # nope, make sure we're connected to the repository root:
1279        my $ok;
1280        my @tried_b;
1281        $path = $ra->{svn_path};
1282        $ra = Git::SVN::Ra->new($ra->{repos_root});
1283        while (length $path) {
1284                unless ($tried{"$ra->{url}/$path"}) {
1285                        $ok = $self->read_svm_props($ra, $path, $r);
1286                        last if $ok;
1287                        $tried{"$ra->{url}/$path"} = 1;
1288                }
1289                $path =~ s#/?[^/]+$##;
1290        }
1291        die "Path: '$path' should be ''\n" if $path ne '';
1292        $ok ||= $self->read_svm_props($ra, $path, $r);
1293        $tried{"$ra->{url}/$path"} = 1;
1294        if (!$ok) {
1295                die @err, (map { "  $_\n" } keys %tried), "\n";
1296        }
1297        Git::SVN::Ra->new($self->{url});
1298}
1299
1300sub svnsync {
1301        my ($self) = @_;
1302        return $self->{svnsync} if $self->{svnsync};
1303
1304        if ($self->no_metadata) {
1305                die "Can't have both 'noMetadata' and ",
1306                    "'useSvnsyncProps' options set!\n";
1307        }
1308        if ($self->rewrite_root) {
1309                die "Can't have both 'useSvnsyncProps' and 'rewriteRoot' ",
1310                    "options set!\n";
1311        }
1312
1313        my $svnsync;
1314        # see if we have it in our config, first:
1315        eval {
1316                my $section = "svn-remote.$self->{repo_id}";
1317                $svnsync = {
1318                  url => tmp_config('--get', "$section.svnsync-url"),
1319                  uuid => tmp_config('--get', "$section.svnsync-uuid"),
1320                }
1321        };
1322        if ($svnsync && $svnsync->{url} && $svnsync->{uuid}) {
1323                return $self->{svnsync} = $svnsync;
1324        }
1325
1326        my $err = "useSvnsyncProps set, but failed to read " .
1327                  "svnsync property: svn:sync-from-";
1328        my $rp = $self->ra->rev_proplist(0);
1329
1330        my $url = $rp->{'svn:sync-from-url'} or die $err . "url\n";
1331        $url =~ m{^[a-z\+]+://} or
1332                   die "doesn't look right - svn:sync-from-url is '$url'\n";
1333
1334        my $uuid = $rp->{'svn:sync-from-uuid'} or die $err . "uuid\n";
1335        $uuid =~ m{^[0-9a-f\-]{30,}$} or
1336                   die "doesn't look right - svn:sync-from-uuid is '$uuid'\n";
1337
1338        my $section = "svn-remote.$self->{repo_id}";
1339        tmp_config('--add', "$section.svnsync-uuid", $uuid);
1340        tmp_config('--add', "$section.svnsync-url", $url);
1341        return $self->{svnsync} = { url => $url, uuid => $uuid };
1342}
1343
1344# this allows us to memoize our SVN::Ra UUID locally and avoid a
1345# remote lookup (useful for 'git svn log').
1346sub ra_uuid {
1347        my ($self) = @_;
1348        unless ($self->{ra_uuid}) {
1349                my $key = "svn-remote.$self->{repo_id}.uuid";
1350                my $uuid = eval { tmp_config('--get', $key) };
1351                if (!$@ && $uuid && $uuid =~ /^([a-f\d\-]{30,})$/) {
1352                        $self->{ra_uuid} = $uuid;
1353                } else {
1354                        die "ra_uuid called without URL\n" unless $self->{url};
1355                        $self->{ra_uuid} = $self->ra->get_uuid;
1356                        tmp_config('--add', $key, $self->{ra_uuid});
1357                }
1358        }
1359        $self->{ra_uuid};
1360}
1361
1362sub ra {
1363        my ($self) = shift;
1364        my $ra = Git::SVN::Ra->new($self->{url});
1365        if ($self->use_svm_props && !$self->{svm}) {
1366                if ($self->no_metadata) {
1367                        die "Can't have both 'noMetadata' and ",
1368                            "'useSvmProps' options set!\n";
1369                } elsif ($self->use_svnsync_props) {
1370                        die "Can't have both 'useSvnsyncProps' and ",
1371                            "'useSvmProps' options set!\n";
1372                }
1373                $ra = $self->_set_svm_vars($ra);
1374                $self->{-want_revprops} = 1;
1375        }
1376        $ra;
1377}
1378
1379sub rel_path {
1380        my ($self) = @_;
1381        my $repos_root = $self->ra->{repos_root};
1382        return $self->{path} if ($self->{url} eq $repos_root);
1383        my $url = $self->{url} .
1384                  (length $self->{path} ? "/$self->{path}" : $self->{path});
1385        $url =~ s!^\Q$repos_root\E(?:/+|$)!!g;
1386        $url;
1387}
1388
1389sub traverse_ignore {
1390        my ($self, $fh, $path, $r) = @_;
1391        $path =~ s#^/+##g;
1392        my $ra = $self->ra;
1393        my ($dirent, undef, $props) = $ra->get_dir($path, $r);
1394        my $p = $path;
1395        $p =~ s#^\Q$self->{path}\E(/|$)##;
1396        print $fh length $p ? "\n# $p\n" : "\n# /\n";
1397        if (my $s = $props->{'svn:ignore'}) {
1398                $s =~ s/[\r\n]+/\n/g;
1399                chomp $s;
1400                if (length $p == 0) {
1401                        $s =~ s#\n#\n/$p#g;
1402                        print $fh "/$s\n";
1403                } else {
1404                        $s =~ s#\n#\n/$p/#g;
1405                        print $fh "/$p/$s\n";
1406                }
1407        }
1408        foreach (sort keys %$dirent) {
1409                next if $dirent->{$_}->{kind} != $SVN::Node::dir;
1410                $self->traverse_ignore($fh, "$path/$_", $r);
1411        }
1412}
1413
1414sub last_rev { ($_[0]->last_rev_commit)[0] }
1415sub last_commit { ($_[0]->last_rev_commit)[1] }
1416
1417# returns the newest SVN revision number and newest commit SHA1
1418sub last_rev_commit {
1419        my ($self) = @_;
1420        if (defined $self->{last_rev} && defined $self->{last_commit}) {
1421                return ($self->{last_rev}, $self->{last_commit});
1422        }
1423        my $c = ::verify_ref($self->refname.'^0');
1424        if ($c && !$self->use_svm_props && !$self->no_metadata) {
1425                my $rev = (::cmt_metadata($c))[1];
1426                if (defined $rev) {
1427                        ($self->{last_rev}, $self->{last_commit}) = ($rev, $c);
1428                        return ($rev, $c);
1429                }
1430        }
1431        my $db_path = $self->db_path;
1432        unless (-e $db_path) {
1433                ($self->{last_rev}, $self->{last_commit}) = (undef, undef);
1434                return (undef, undef);
1435        }
1436        my $offset = -41; # from tail
1437        my $rl;
1438        open my $fh, '<', $db_path or croak "$db_path not readable: $!\n";
1439        sysseek($fh, $offset, 2); # don't care for errors
1440        sysread($fh, $rl, 41) == 41 or return (undef, undef);
1441        chomp $rl;
1442        while (('0' x40) eq $rl && sysseek($fh, 0, 1) != 0) {
1443                $offset -= 41;
1444                sysseek($fh, $offset, 2); # don't care for errors
1445                sysread($fh, $rl, 41) == 41 or return (undef, undef);
1446                chomp $rl;
1447        }
1448        if ($c && $c ne $rl) {
1449                die "$db_path and ", $self->refname,
1450                    " inconsistent!:\n$c != $rl\n";
1451        }
1452        my $rev = sysseek($fh, 0, 1) or croak $!;
1453        $rev =  ($rev - 41) / 41;
1454        close $fh or croak $!;
1455        ($self->{last_rev}, $self->{last_commit}) = ($rev, $c);
1456        return ($rev, $c);
1457}
1458
1459sub get_fetch_range {
1460        my ($self, $min, $max) = @_;
1461        $max ||= $self->ra->get_latest_revnum;
1462        $min ||= $self->rev_db_max;
1463        (++$min, $max);
1464}
1465
1466sub tmp_config {
1467        my (@args) = @_;
1468        my $old_def_config = "$ENV{GIT_DIR}/svn/config";
1469        my $config = "$ENV{GIT_DIR}/svn/.metadata";
1470        if (! -f $config && -f $old_def_config) {
1471                rename $old_def_config, $config or
1472                       die "Failed rename $old_def_config => $config: $!\n";
1473        }
1474        my $old_config = $ENV{GIT_CONFIG};
1475        $ENV{GIT_CONFIG} = $config;
1476        $@ = undef;
1477        my @ret = eval {
1478                unless (-f $config) {
1479                        mkfile($config);
1480                        open my $fh, '>', $config or
1481                            die "Can't open $config: $!\n";
1482                        print $fh "; This file is used internally by ",
1483                                  "git-svn\n" or die
1484                                  "Couldn't write to $config: $!\n";
1485                        print $fh "; You should not have to edit it\n" or
1486                              die "Couldn't write to $config: $!\n";
1487                        close $fh or die "Couldn't close $config: $!\n";
1488                }
1489                command('config', @args);
1490        };
1491        my $err = $@;
1492        if (defined $old_config) {
1493                $ENV{GIT_CONFIG} = $old_config;
1494        } else {
1495                delete $ENV{GIT_CONFIG};
1496        }
1497        die $err if $err;
1498        wantarray ? @ret : $ret[0];
1499}
1500
1501sub tmp_index_do {
1502        my ($self, $sub) = @_;
1503        my $old_index = $ENV{GIT_INDEX_FILE};
1504        $ENV{GIT_INDEX_FILE} = $self->{index};
1505        $@ = undef;
1506        my @ret = eval {
1507                my ($dir, $base) = ($self->{index} =~ m#^(.*?)/?([^/]+)$#);
1508                mkpath([$dir]) unless -d $dir;
1509                &$sub;
1510        };
1511        my $err = $@;
1512        if (defined $old_index) {
1513                $ENV{GIT_INDEX_FILE} = $old_index;
1514        } else {
1515                delete $ENV{GIT_INDEX_FILE};
1516        }
1517        die $err if $err;
1518        wantarray ? @ret : $ret[0];
1519}
1520
1521sub assert_index_clean {
1522        my ($self, $treeish) = @_;
1523
1524        $self->tmp_index_do(sub {
1525                command_noisy('read-tree', $treeish) unless -e $self->{index};
1526                my $x = command_oneline('write-tree');
1527                my ($y) = (command(qw/cat-file commit/, $treeish) =~
1528                           /^tree ($::sha1)/mo);
1529                return if $y eq $x;
1530
1531                warn "Index mismatch: $y != $x\nrereading $treeish\n";
1532                unlink $self->{index} or die "unlink $self->{index}: $!\n";
1533                command_noisy('read-tree', $treeish);
1534                $x = command_oneline('write-tree');
1535                if ($y ne $x) {
1536                        ::fatal "trees ($treeish) $y != $x\n",
1537                                "Something is seriously wrong...\n";
1538                }
1539        });
1540}
1541
1542sub get_commit_parents {
1543        my ($self, $log_entry) = @_;
1544        my (%seen, @ret, @tmp);
1545        # legacy support for 'set-tree'; this is only used by set_tree_cb:
1546        if (my $ip = $self->{inject_parents}) {
1547                if (my $commit = delete $ip->{$log_entry->{revision}}) {
1548                        push @tmp, $commit;
1549                }
1550        }
1551        if (my $cur = ::verify_ref($self->refname.'^0')) {
1552                push @tmp, $cur;
1553        }
1554        push @tmp, $_ foreach (@{$log_entry->{parents}}, @tmp);
1555        while (my $p = shift @tmp) {
1556                next if $seen{$p};
1557                $seen{$p} = 1;
1558                push @ret, $p;
1559                # MAXPARENT is defined to 16 in commit-tree.c:
1560                last if @ret >= 16;
1561        }
1562        if (@tmp) {
1563                die "r$log_entry->{revision}: No room for parents:\n\t",
1564                    join("\n\t", @tmp), "\n";
1565        }
1566        @ret;
1567}
1568
1569sub rewrite_root {
1570        my ($self) = @_;
1571        return $self->{-rewrite_root} if exists $self->{-rewrite_root};
1572        my $k = "svn-remote.$self->{repo_id}.rewriteRoot";
1573        my $rwr = eval { command_oneline(qw/config --get/, $k) };
1574        if ($rwr) {
1575                $rwr =~ s#/+$##;
1576                if ($rwr !~ m#^[a-z\+]+://#) {
1577                        die "$rwr is not a valid URL (key: $k)\n";
1578                }
1579        }
1580        $self->{-rewrite_root} = $rwr;
1581}
1582
1583sub metadata_url {
1584        my ($self) = @_;
1585        ($self->rewrite_root || $self->{url}) .
1586           (length $self->{path} ? '/' . $self->{path} : '');
1587}
1588
1589sub full_url {
1590        my ($self) = @_;
1591        $self->{url} . (length $self->{path} ? '/' . $self->{path} : '');
1592}
1593
1594sub do_git_commit {
1595        my ($self, $log_entry) = @_;
1596        my $lr = $self->last_rev;
1597        if (defined $lr && $lr >= $log_entry->{revision}) {
1598                die "Last fetched revision of ", $self->refname,
1599                    " was r$lr, but we are about to fetch: ",
1600                    "r$log_entry->{revision}!\n";
1601        }
1602        if (my $c = $self->rev_db_get($log_entry->{revision})) {
1603                croak "$log_entry->{revision} = $c already exists! ",
1604                      "Why are we refetching it?\n";
1605        }
1606        $ENV{GIT_AUTHOR_NAME} = $ENV{GIT_COMMITTER_NAME} = $log_entry->{name};
1607        $ENV{GIT_AUTHOR_EMAIL} = $ENV{GIT_COMMITTER_EMAIL} =
1608                                                          $log_entry->{email};
1609        $ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} = $log_entry->{date};
1610
1611        my $tree = $log_entry->{tree};
1612        if (!defined $tree) {
1613                $tree = $self->tmp_index_do(sub {
1614                                            command_oneline('write-tree') });
1615        }
1616        die "Tree is not a valid sha1: $tree\n" if $tree !~ /^$::sha1$/o;
1617
1618        my @exec = ('git-commit-tree', $tree);
1619        foreach ($self->get_commit_parents($log_entry)) {
1620                push @exec, '-p', $_;
1621        }
1622        defined(my $pid = open3(my $msg_fh, my $out_fh, '>&STDERR', @exec))
1623                                                                   or croak $!;
1624        print $msg_fh $log_entry->{log} or croak $!;
1625        unless ($self->no_metadata) {
1626                print $msg_fh "\ngit-svn-id: $log_entry->{metadata}\n"
1627                              or croak $!;
1628        }
1629        $msg_fh->flush == 0 or croak $!;
1630        close $msg_fh or croak $!;
1631        chomp(my $commit = do { local $/; <$out_fh> });
1632        close $out_fh or croak $!;
1633        waitpid $pid, 0;
1634        croak $? if $?;
1635        if ($commit !~ /^$::sha1$/o) {
1636                die "Failed to commit, invalid sha1: $commit\n";
1637        }
1638
1639        $self->rev_db_set($log_entry->{revision}, $commit, 1);
1640
1641        $self->{last_rev} = $log_entry->{revision};
1642        $self->{last_commit} = $commit;
1643        print "r$log_entry->{revision}";
1644        if (defined $log_entry->{svm_revision}) {
1645                 print " (\@$log_entry->{svm_revision})";
1646                 $self->rev_db_set($log_entry->{svm_revision}, $commit,
1647                                   0, $self->svm_uuid);
1648        }
1649        print " = $commit ($self->{ref_id})\n";
1650        if (defined $_repack && (--$_repack_nr == 0)) {
1651                $_repack_nr = $_repack;
1652                # repack doesn't use any arguments with spaces in them, does it?
1653                print "Running git repack $_repack_flags ...\n";
1654                command_noisy('repack', split(/\s+/, $_repack_flags));
1655                print "Done repacking\n";
1656        }
1657        return $commit;
1658}
1659
1660sub match_paths {
1661        my ($self, $paths, $r) = @_;
1662        return 1 if $self->{path} eq '';
1663        if (my $path = $paths->{"/$self->{path}"}) {
1664                return ($path->{action} eq 'D') ? 0 : 1;
1665        }
1666        $self->{path_regex} ||= qr/^\/\Q$self->{path}\E\//;
1667        if (grep /$self->{path_regex}/, keys %$paths) {
1668                return 1;
1669        }
1670        my $c = '';
1671        foreach (split m#/#, $self->{path}) {
1672                $c .= "/$_";
1673                next unless ($paths->{$c} &&
1674                             ($paths->{$c}->{action} =~ /^[AR]$/));
1675                if ($self->ra->check_path($self->{path}, $r) ==
1676                    $SVN::Node::dir) {
1677                        return 1;
1678                }
1679        }
1680        return 0;
1681}
1682
1683sub find_parent_branch {
1684        my ($self, $paths, $rev) = @_;
1685        return undef unless $self->follow_parent;
1686        unless (defined $paths) {
1687                my $err_handler = $SVN::Error::handler;
1688                $SVN::Error::handler = \&Git::SVN::Ra::skip_unknown_revs;
1689                $self->ra->get_log([$self->{path}], $rev, $rev, 0, 1, 1, sub {
1690                                   $paths =
1691                                      Git::SVN::Ra::dup_changed_paths($_[0]) });
1692                $SVN::Error::handler = $err_handler;
1693        }
1694        return undef unless defined $paths;
1695
1696        # look for a parent from another branch:
1697        my @b_path_components = split m#/#, $self->rel_path;
1698        my @a_path_components;
1699        my $i;
1700        while (@b_path_components) {
1701                $i = $paths->{'/'.join('/', @b_path_components)};
1702                last if $i && defined $i->{copyfrom_path};
1703                unshift(@a_path_components, pop(@b_path_components));
1704        }
1705        return undef unless defined $i && defined $i->{copyfrom_path};
1706        my $branch_from = $i->{copyfrom_path};
1707        if (@a_path_components) {
1708                print STDERR "branch_from: $branch_from => ";
1709                $branch_from .= '/'.join('/', @a_path_components);
1710                print STDERR $branch_from, "\n";
1711        }
1712        my $r = $i->{copyfrom_rev};
1713        my $repos_root = $self->ra->{repos_root};
1714        my $url = $self->ra->{url};
1715        my $new_url = $repos_root . $branch_from;
1716        print STDERR  "Found possible branch point: ",
1717                      "$new_url => ", $self->full_url, ", $r\n";
1718        $branch_from =~ s#^/##;
1719        my $gs = Git::SVN->find_by_url($new_url, $repos_root, $branch_from);
1720        unless ($gs) {
1721                my $ref_id = $self->{ref_id};
1722                $ref_id =~ s/\@\d+$//;
1723                $ref_id .= "\@$r";
1724                # just grow a tail if we're not unique enough :x
1725                $ref_id .= '-' while find_ref($ref_id);
1726                print STDERR "Initializing parent: $ref_id\n";
1727                $gs = Git::SVN->init($new_url, '', $ref_id, $ref_id, 1);
1728        }
1729        my ($r0, $parent) = $gs->find_rev_before($r, 1);
1730        if (!defined $r0 || !defined $parent) {
1731                my ($base, $head) = parse_revision_argument(0, $r);
1732                if ($base <= $r) {
1733                        $gs->fetch($base, $r);
1734                }
1735                ($r0, $parent) = $gs->last_rev_commit;
1736        }
1737        if (defined $r0 && defined $parent) {
1738                print STDERR "Found branch parent: ($self->{ref_id}) $parent\n";
1739                my $ed;
1740                if ($self->ra->can_do_switch) {
1741                        $self->assert_index_clean($parent);
1742                        print STDERR "Following parent with do_switch\n";
1743                        # do_switch works with svn/trunk >= r22312, but that
1744                        # is not included with SVN 1.4.3 (the latest version
1745                        # at the moment), so we can't rely on it
1746                        $self->{last_commit} = $parent;
1747                        $ed = SVN::Git::Fetcher->new($self);
1748                        $gs->ra->gs_do_switch($r0, $rev, $gs,
1749                                              $self->full_url, $ed)
1750                          or die "SVN connection failed somewhere...\n";
1751                } else {
1752                        print STDERR "Following parent with do_update\n";
1753                        $ed = SVN::Git::Fetcher->new($self);
1754                        $self->ra->gs_do_update($rev, $rev, $self, $ed)
1755                          or die "SVN connection failed somewhere...\n";
1756                }
1757                print STDERR "Successfully followed parent\n";
1758                return $self->make_log_entry($rev, [$parent], $ed);
1759        }
1760        return undef;
1761}
1762
1763sub do_fetch {
1764        my ($self, $paths, $rev) = @_;
1765        my $ed;
1766        my ($last_rev, @parents);
1767        if (my $lc = $self->last_commit) {
1768                # we can have a branch that was deleted, then re-added
1769                # under the same name but copied from another path, in
1770                # which case we'll have multiple parents (we don't
1771                # want to break the original ref, nor lose copypath info):
1772                if (my $log_entry = $self->find_parent_branch($paths, $rev)) {
1773                        push @{$log_entry->{parents}}, $lc;
1774                        return $log_entry;
1775                }
1776                $ed = SVN::Git::Fetcher->new($self);
1777                $last_rev = $self->{last_rev};
1778                $ed->{c} = $lc;
1779                @parents = ($lc);
1780        } else {
1781                $last_rev = $rev;
1782                if (my $log_entry = $self->find_parent_branch($paths, $rev)) {
1783                        return $log_entry;
1784                }
1785                $ed = SVN::Git::Fetcher->new($self);
1786        }
1787        unless ($self->ra->gs_do_update($last_rev, $rev, $self, $ed)) {
1788                die "SVN connection failed somewhere...\n";
1789        }
1790        $self->make_log_entry($rev, \@parents, $ed);
1791}
1792
1793sub get_untracked {
1794        my ($self, $ed) = @_;
1795        my @out;
1796        my $h = $ed->{empty};
1797        foreach (sort keys %$h) {
1798                my $act = $h->{$_} ? '+empty_dir' : '-empty_dir';
1799                push @out, "  $act: " . uri_encode($_);
1800                warn "W: $act: $_\n";
1801        }
1802        foreach my $t (qw/dir_prop file_prop/) {
1803                $h = $ed->{$t} or next;
1804                foreach my $path (sort keys %$h) {
1805                        my $ppath = $path eq '' ? '.' : $path;
1806                        foreach my $prop (sort keys %{$h->{$path}}) {
1807                                next if $SKIP_PROP{$prop};
1808                                my $v = $h->{$path}->{$prop};
1809                                my $t_ppath_prop = "$t: " .
1810                                                    uri_encode($ppath) . ' ' .
1811                                                    uri_encode($prop);
1812                                if (defined $v) {
1813                                        push @out, "  +$t_ppath_prop " .
1814                                                   uri_encode($v);
1815                                } else {
1816                                        push @out, "  -$t_ppath_prop";
1817                                }
1818                        }
1819                }
1820        }
1821        foreach my $t (qw/absent_file absent_directory/) {
1822                $h = $ed->{$t} or next;
1823                foreach my $parent (sort keys %$h) {
1824                        foreach my $path (sort @{$h->{$parent}}) {
1825                                push @out, "  $t: " .
1826                                           uri_encode("$parent/$path");
1827                                warn "W: $t: $parent/$path ",
1828                                     "Insufficient permissions?\n";
1829                        }
1830                }
1831        }
1832        \@out;
1833}
1834
1835sub parse_svn_date {
1836        my $date = shift || return '+0000 1970-01-01 00:00:00';
1837        my ($Y,$m,$d,$H,$M,$S) = ($date =~ /^(\d{4})\-(\d\d)\-(\d\d)T
1838                                            (\d\d)\:(\d\d)\:(\d\d).\d+Z$/x) or
1839                                         croak "Unable to parse date: $date\n";
1840        "+0000 $Y-$m-$d $H:$M:$S";
1841}
1842
1843sub check_author {
1844        my ($author) = @_;
1845        if (!defined $author || length $author == 0) {
1846                $author = '(no author)';
1847        }
1848        if (defined $::_authors && ! defined $::users{$author}) {
1849                die "Author: $author not defined in $::_authors file\n";
1850        }
1851        $author;
1852}
1853
1854sub make_log_entry {
1855        my ($self, $rev, $parents, $ed) = @_;
1856        my $untracked = $self->get_untracked($ed);
1857
1858        open my $un, '>>', "$self->{dir}/unhandled.log" or croak $!;
1859        print $un "r$rev\n" or croak $!;
1860        print $un $_, "\n" foreach @$untracked;
1861        my %log_entry = ( parents => $parents || [], revision => $rev,
1862                          log => '');
1863
1864        my $headrev;
1865        my $logged = delete $self->{logged_rev_props};
1866        if (!$logged || $self->{-want_revprops}) {
1867                my $rp = $self->ra->rev_proplist($rev);
1868                foreach (sort keys %$rp) {
1869                        my $v = $rp->{$_};
1870                        if (/^svn:(author|date|log)$/) {
1871                                $log_entry{$1} = $v;
1872                        } elsif ($_ eq 'svm:headrev') {
1873                                $headrev = $v;
1874                        } else {
1875                                print $un "  rev_prop: ", uri_encode($_), ' ',
1876                                          uri_encode($v), "\n";
1877                        }
1878                }
1879        } else {
1880                map { $log_entry{$_} = $logged->{$_} } keys %$logged;
1881        }
1882        close $un or croak $!;
1883
1884        $log_entry{date} = parse_svn_date($log_entry{date});
1885        $log_entry{log} .= "\n";
1886        my $author = $log_entry{author} = check_author($log_entry{author});
1887        my ($name, $email) = defined $::users{$author} ? @{$::users{$author}}
1888                                                       : ($author, undef);
1889        if (defined $headrev && $self->use_svm_props) {
1890                if ($self->rewrite_root) {
1891                        die "Can't have both 'useSvmProps' and 'rewriteRoot' ",
1892                            "options set!\n";
1893                }
1894                my ($uuid, $r) = $headrev =~ m{^([a-f\d\-]{30,}):(\d+)$};
1895                # we don't want "SVM: initializing mirror for junk" ...
1896                return undef if $r == 0;
1897                my $svm = $self->svm;
1898                if ($uuid ne $svm->{uuid}) {
1899                        die "UUID mismatch on SVM path:\n",
1900                            "expected: $svm->{uuid}\n",
1901                            "     got: $uuid\n";
1902                }
1903                my $full_url = $self->full_url;
1904                $full_url =~ s#^\Q$svm->{replace}\E(/|$)#$svm->{source}$1# or
1905                             die "Failed to replace '$svm->{replace}' with ",
1906                                 "'$svm->{source}' in $full_url\n";
1907                # throw away username for storing in records
1908                remove_username($full_url);
1909                $log_entry{metadata} = "$full_url\@$r $uuid";
1910                $log_entry{svm_revision} = $r;
1911                $email ||= "$author\@$uuid"
1912        } elsif ($self->use_svnsync_props) {
1913                my $full_url = $self->svnsync->{url};
1914                $full_url .= "/$self->{path}" if length $self->{path};
1915                remove_username($full_url);
1916                my $uuid = $self->svnsync->{uuid};
1917                $log_entry{metadata} = "$full_url\@$rev $uuid";
1918                $email ||= "$author\@$uuid"
1919        } else {
1920                my $url = $self->metadata_url;
1921                remove_username($url);
1922                $log_entry{metadata} = "$url\@$rev " .
1923                                       $self->ra->get_uuid;
1924                $email ||= "$author\@" . $self->ra->get_uuid;
1925        }
1926        $log_entry{name} = $name;
1927        $log_entry{email} = $email;
1928        \%log_entry;
1929}
1930
1931sub fetch {
1932        my ($self, $min_rev, $max_rev, @parents) = @_;
1933        my ($last_rev, $last_commit) = $self->last_rev_commit;
1934        my ($base, $head) = $self->get_fetch_range($min_rev, $max_rev);
1935        $self->ra->gs_fetch_loop_common($base, $head, [$self]);
1936}
1937
1938sub set_tree_cb {
1939        my ($self, $log_entry, $tree, $rev, $date, $author) = @_;
1940        $self->{inject_parents} = { $rev => $tree };
1941        $self->fetch(undef, undef);
1942}
1943
1944sub set_tree {
1945        my ($self, $tree) = (shift, shift);
1946        my $log_entry = ::get_commit_entry($tree);
1947        unless ($self->{last_rev}) {
1948                fatal("Must have an existing revision to commit\n");
1949        }
1950        my %ed_opts = ( r => $self->{last_rev},
1951                        log => $log_entry->{log},
1952                        ra => $self->ra,
1953                        tree_a => $self->{last_commit},
1954                        tree_b => $tree,
1955                        editor_cb => sub {
1956                               $self->set_tree_cb($log_entry, $tree, @_) },
1957                        svn_path => $self->{path} );
1958        if (!SVN::Git::Editor->new(\%ed_opts)->apply_diff) {
1959                print "No changes\nr$self->{last_rev} = $tree\n";
1960        }
1961}
1962
1963sub rebuild {
1964        my ($self) = @_;
1965        my $db_path = $self->db_path;
1966        return if (-e $db_path && ! -z $db_path);
1967        return unless ::verify_ref($self->refname.'^0');
1968        if (-f $self->{db_root}) {
1969                rename $self->{db_root}, $db_path or die
1970                     "rename $self->{db_root} => $db_path failed: $!\n";
1971                my ($dir, $base) = ($db_path =~ m#^(.*?)/?([^/]+)$#);
1972                symlink $base, $self->{db_root} or die
1973                     "symlink $base => $self->{db_root} failed: $!\n";
1974                return;
1975        }
1976        print "Rebuilding $db_path ...\n";
1977        my ($log, $ctx) = command_output_pipe("log", $self->refname);
1978        my $latest;
1979        my $full_url = $self->full_url;
1980        remove_username($full_url);
1981        my $svn_uuid;
1982        my $c;
1983        while (<$log>) {
1984                if ( m{^commit ($::sha1)$} ) {
1985                        $c = $1;
1986                        next;
1987                }
1988                next unless s{^\s*(git-svn-id:)}{$1};
1989                my ($url, $rev, $uuid) = ::extract_metadata($_);
1990                remove_username($url);
1991
1992                # ignore merges (from set-tree)
1993                next if (!defined $rev || !$uuid);
1994
1995                # if we merged or otherwise started elsewhere, this is
1996                # how we break out of it
1997                if ((defined $svn_uuid && ($uuid ne $svn_uuid)) ||
1998                    ($full_url && $url && ($url ne $full_url))) {
1999                        next;
2000                }
2001                $latest ||= $rev;
2002                $svn_uuid ||= $uuid;
2003
2004                $self->rev_db_set($rev, $c);
2005                print "r$rev = $c\n";
2006        }
2007        command_close_pipe($log, $ctx);
2008        print "Done rebuilding $db_path\n";
2009}
2010
2011# rev_db:
2012# Tie::File seems to be prone to offset errors if revisions get sparse,
2013# it's not that fast, either.  Tie::File is also not in Perl 5.6.  So
2014# one of my favorite modules is out :<  Next up would be one of the DBM
2015# modules, but I'm not sure which is most portable...  So I'll just
2016# go with something that's plain-text, but still capable of
2017# being randomly accessed.  So here's my ultra-simple fixed-width
2018# database.  All records are 40 characters + "\n", so it's easy to seek
2019# to a revision: (41 * rev) is the byte offset.
2020# A record of 40 0s denotes an empty revision.
2021# And yes, it's still pretty fast (faster than Tie::File).
2022# These files are disposable unless noMetadata or useSvmProps is set
2023
2024sub _rev_db_set {
2025        my ($fh, $rev, $commit) = @_;
2026        my $offset = $rev * 41;
2027        # assume that append is the common case:
2028        seek $fh, 0, 2 or croak $!;
2029        my $pos = tell $fh;
2030        if ($pos < $offset) {
2031                for (1 .. (($offset - $pos) / 41)) {
2032                        print $fh (('0' x 40),"\n") or croak $!;
2033                }
2034        }
2035        seek $fh, $offset, 0 or croak $!;
2036        print $fh $commit,"\n" or croak $!;
2037}
2038
2039sub mkfile {
2040        my ($path) = @_;
2041        unless (-e $path) {
2042                my ($dir, $base) = ($path =~ m#^(.*?)/?([^/]+)$#);
2043                mkpath([$dir]) unless -d $dir;
2044                open my $fh, '>>', $path or die "Couldn't create $path: $!\n";
2045                close $fh or die "Couldn't close (create) $path: $!\n";
2046        }
2047}
2048
2049sub rev_db_set {
2050        my ($self, $rev, $commit, $update_ref, $uuid) = @_;
2051        length $commit == 40 or die "arg3 must be a full SHA1 hexsum\n";
2052        my $db = $self->db_path($uuid);
2053        my $db_lock = "$db.lock";
2054        my $sig;
2055        if ($update_ref) {
2056                $SIG{INT} = $SIG{HUP} = $SIG{TERM} = $SIG{ALRM} = $SIG{PIPE} =
2057                            $SIG{USR1} = $SIG{USR2} = sub { $sig = $_[0] };
2058        }
2059        mkfile($db);
2060
2061        $LOCKFILES{$db_lock} = 1;
2062        my $sync;
2063        # both of these options make our .rev_db file very, very important
2064        # and we can't afford to lose it because rebuild() won't work
2065        if ($self->use_svm_props || $self->no_metadata) {
2066                $sync = 1;
2067                copy($db, $db_lock) or die "rev_db_set(@_): ",
2068                                           "Failed to copy: ",
2069                                           "$db => $db_lock ($!)\n";
2070        } else {
2071                rename $db, $db_lock or die "rev_db_set(@_): ",
2072                                            "Failed to rename: ",
2073                                            "$db => $db_lock ($!)\n";
2074        }
2075        open my $fh, '+<', $db_lock or die "Couldn't open $db_lock: $!\n";
2076        _rev_db_set($fh, $rev, $commit);
2077        if ($sync) {
2078                $fh->flush or die "Couldn't flush $db_lock: $!\n";
2079                $fh->sync or die "Couldn't sync $db_lock: $!\n";
2080        }
2081        close $fh or croak $!;
2082        if ($update_ref) {
2083                $_head = $self;
2084                command_noisy('update-ref', '-m', "r$rev",
2085                              $self->refname, $commit);
2086        }
2087        rename $db_lock, $db or die "rev_db_set(@_): ", "Failed to rename: ",
2088                                    "$db_lock => $db ($!)\n";
2089        delete $LOCKFILES{$db_lock};
2090        if ($update_ref) {
2091                $SIG{INT} = $SIG{HUP} = $SIG{TERM} = $SIG{ALRM} = $SIG{PIPE} =
2092                            $SIG{USR1} = $SIG{USR2} = 'DEFAULT';
2093                kill $sig, $$ if defined $sig;
2094        }
2095}
2096
2097sub rev_db_max {
2098        my ($self) = @_;
2099        $self->rebuild;
2100        my $db_path = $self->db_path;
2101        my @stat = stat $db_path or return 0;
2102        ($stat[7] % 41) == 0 or die "$db_path inconsistent size: $stat[7]\n";
2103        my $max = $stat[7] / 41;
2104        (($max > 0) ? $max - 1 : 0);
2105}
2106
2107sub rev_db_get {
2108        my ($self, $rev, $uuid) = @_;
2109        my $ret;
2110        my $offset = $rev * 41;
2111        my $db_path = $self->db_path($uuid);
2112        return undef unless -e $db_path;
2113        open my $fh, '<', $db_path or croak $!;
2114        if (sysseek($fh, $offset, 0) == $offset) {
2115                my $read = sysread($fh, $ret, 40);
2116                $ret = undef if ($read != 40 || $ret eq ('0'x40));
2117        }
2118        close $fh or croak $!;
2119        $ret;
2120}
2121
2122sub find_rev_before {
2123        my ($self, $rev, $eq_ok) = @_;
2124        --$rev unless $eq_ok;
2125        while ($rev > 0) {
2126                if (my $c = $self->rev_db_get($rev)) {
2127                        return ($rev, $c);
2128                }
2129                --$rev;
2130        }
2131        return (undef, undef);
2132}
2133
2134sub _new {
2135        my ($class, $repo_id, $ref_id, $path) = @_;
2136        unless (defined $repo_id && length $repo_id) {
2137                $repo_id = $Git::SVN::default_repo_id;
2138        }
2139        unless (defined $ref_id && length $ref_id) {
2140                $_[2] = $ref_id = $Git::SVN::default_ref_id;
2141        }
2142        $_[1] = $repo_id = sanitize_remote_name($repo_id);
2143        my $dir = "$ENV{GIT_DIR}/svn/$ref_id";
2144        $_[3] = $path = '' unless (defined $path);
2145        mkpath(["$ENV{GIT_DIR}/svn"]);
2146        bless {
2147                ref_id => $ref_id, dir => $dir, index => "$dir/index",
2148                path => $path, config => "$ENV{GIT_DIR}/svn/config",
2149                db_root => "$dir/.rev_db", repo_id => $repo_id }, $class;
2150}
2151
2152sub db_path {
2153        my ($self, $uuid) = @_;
2154        $uuid ||= $self->ra_uuid;
2155        "$self->{db_root}.$uuid";
2156}
2157
2158sub uri_encode {
2159        my ($f) = @_;
2160        $f =~ s#([^a-zA-Z0-9\*!\:_\./\-])#uc sprintf("%%%02x",ord($1))#eg;
2161        $f
2162}
2163
2164sub remove_username {
2165        $_[0] =~ s{^([^:]*://)[^@]+@}{$1};
2166}
2167
2168package Git::SVN::Prompt;
2169use strict;
2170use warnings;
2171require SVN::Core;
2172use vars qw/$_no_auth_cache $_username/;
2173
2174sub simple {
2175        my ($cred, $realm, $default_username, $may_save, $pool) = @_;
2176        $may_save = undef if $_no_auth_cache;
2177        $default_username = $_username if defined $_username;
2178        if (defined $default_username && length $default_username) {
2179                if (defined $realm && length $realm) {
2180                        print STDERR "Authentication realm: $realm\n";
2181                        STDERR->flush;
2182                }
2183                $cred->username($default_username);
2184        } else {
2185                username($cred, $realm, $may_save, $pool);
2186        }
2187        $cred->password(_read_password("Password for '" .
2188                                       $cred->username . "': ", $realm));
2189        $cred->may_save($may_save);
2190        $SVN::_Core::SVN_NO_ERROR;
2191}
2192
2193sub ssl_server_trust {
2194        my ($cred, $realm, $failures, $cert_info, $may_save, $pool) = @_;
2195        $may_save = undef if $_no_auth_cache;
2196        print STDERR "Error validating server certificate for '$realm':\n";
2197        if ($failures & $SVN::Auth::SSL::UNKNOWNCA) {
2198                print STDERR " - The certificate is not issued by a trusted ",
2199                      "authority. Use the\n",
2200                      "   fingerprint to validate the certificate manually!\n";
2201        }
2202        if ($failures & $SVN::Auth::SSL::CNMISMATCH) {
2203                print STDERR " - The certificate hostname does not match.\n";
2204        }
2205        if ($failures & $SVN::Auth::SSL::NOTYETVALID) {
2206                print STDERR " - The certificate is not yet valid.\n";
2207        }
2208        if ($failures & $SVN::Auth::SSL::EXPIRED) {
2209                print STDERR " - The certificate has expired.\n";
2210        }
2211        if ($failures & $SVN::Auth::SSL::OTHER) {
2212                print STDERR " - The certificate has an unknown error.\n";
2213        }
2214        printf STDERR
2215                "Certificate information:\n".
2216                " - Hostname: %s\n".
2217                " - Valid: from %s until %s\n".
2218                " - Issuer: %s\n".
2219                " - Fingerprint: %s\n",
2220                map $cert_info->$_, qw(hostname valid_from valid_until
2221                                       issuer_dname fingerprint);
2222        my $choice;
2223prompt:
2224        print STDERR $may_save ?
2225              "(R)eject, accept (t)emporarily or accept (p)ermanently? " :
2226              "(R)eject or accept (t)emporarily? ";
2227        STDERR->flush;
2228        $choice = lc(substr(<STDIN> || 'R', 0, 1));
2229        if ($choice =~ /^t$/i) {
2230                $cred->may_save(undef);
2231        } elsif ($choice =~ /^r$/i) {
2232                return -1;
2233        } elsif ($may_save && $choice =~ /^p$/i) {
2234                $cred->may_save($may_save);
2235        } else {
2236                goto prompt;
2237        }
2238        $cred->accepted_failures($failures);
2239        $SVN::_Core::SVN_NO_ERROR;
2240}
2241
2242sub ssl_client_cert {
2243        my ($cred, $realm, $may_save, $pool) = @_;
2244        $may_save = undef if $_no_auth_cache;
2245        print STDERR "Client certificate filename: ";
2246        STDERR->flush;
2247        chomp(my $filename = <STDIN>);
2248        $cred->cert_file($filename);
2249        $cred->may_save($may_save);
2250        $SVN::_Core::SVN_NO_ERROR;
2251}
2252
2253sub ssl_client_cert_pw {
2254        my ($cred, $realm, $may_save, $pool) = @_;
2255        $may_save = undef if $_no_auth_cache;
2256        $cred->password(_read_password("Password: ", $realm));
2257        $cred->may_save($may_save);
2258        $SVN::_Core::SVN_NO_ERROR;
2259}
2260
2261sub username {
2262        my ($cred, $realm, $may_save, $pool) = @_;
2263        $may_save = undef if $_no_auth_cache;
2264        if (defined $realm && length $realm) {
2265                print STDERR "Authentication realm: $realm\n";
2266        }
2267        my $username;
2268        if (defined $_username) {
2269                $username = $_username;
2270        } else {
2271                print STDERR "Username: ";
2272                STDERR->flush;
2273                chomp($username = <STDIN>);
2274        }
2275        $cred->username($username);
2276        $cred->may_save($may_save);
2277        $SVN::_Core::SVN_NO_ERROR;
2278}
2279
2280sub _read_password {
2281        my ($prompt, $realm) = @_;
2282        print STDERR $prompt;
2283        STDERR->flush;
2284        require Term::ReadKey;
2285        Term::ReadKey::ReadMode('noecho');
2286        my $password = '';
2287        while (defined(my $key = Term::ReadKey::ReadKey(0))) {
2288                last if $key =~ /[\012\015]/; # \n\r
2289                $password .= $key;
2290        }
2291        Term::ReadKey::ReadMode('restore');
2292        print STDERR "\n";
2293        STDERR->flush;
2294        $password;
2295}
2296
2297package main;
2298
2299{
2300        my $kill_stupid_warnings = $SVN::Node::none.$SVN::Node::file.
2301                                $SVN::Node::dir.$SVN::Node::unknown.
2302                                $SVN::Node::none.$SVN::Node::file.
2303                                $SVN::Node::dir.$SVN::Node::unknown.
2304                                $SVN::Auth::SSL::CNMISMATCH.
2305                                $SVN::Auth::SSL::NOTYETVALID.
2306                                $SVN::Auth::SSL::EXPIRED.
2307                                $SVN::Auth::SSL::UNKNOWNCA.
2308                                $SVN::Auth::SSL::OTHER;
2309}
2310
2311package SVN::Git::Fetcher;
2312use vars qw/@ISA/;
2313use strict;
2314use warnings;
2315use Carp qw/croak/;
2316use IO::File qw//;
2317use Digest::MD5;
2318
2319# file baton members: path, mode_a, mode_b, pool, fh, blob, base
2320sub new {
2321        my ($class, $git_svn) = @_;
2322        my $self = SVN::Delta::Editor->new;
2323        bless $self, $class;
2324        $self->{c} = $git_svn->{last_commit} if exists $git_svn->{last_commit};
2325        $self->{empty} = {};
2326        $self->{dir_prop} = {};
2327        $self->{file_prop} = {};
2328        $self->{absent_dir} = {};
2329        $self->{absent_file} = {};
2330        $self->{gii} = $git_svn->tmp_index_do(sub { Git::IndexInfo->new });
2331        $self;
2332}
2333
2334sub set_path_strip {
2335        my ($self, $path) = @_;
2336        $self->{path_strip} = qr/^\Q$path\E(\/|$)/ if length $path;
2337}
2338
2339sub open_root {
2340        { path => '' };
2341}
2342
2343sub open_directory {
2344        my ($self, $path, $pb, $rev) = @_;
2345        { path => $path };
2346}
2347
2348sub git_path {
2349        my ($self, $path) = @_;
2350        if ($self->{path_strip}) {
2351                $path =~ s!$self->{path_strip}!! or
2352                  die "Failed to strip path '$path' ($self->{path_strip})\n";
2353        }
2354        $path;
2355}
2356
2357sub delete_entry {
2358        my ($self, $path, $rev, $pb) = @_;
2359
2360        my $gpath = $self->git_path($path);
2361        return undef if ($gpath eq '');
2362
2363        # remove entire directories.
2364        if (command('ls-tree', $self->{c}, '--', $gpath) =~ /^040000 tree/) {
2365                my ($ls, $ctx) = command_output_pipe(qw/ls-tree
2366                                                     -r --name-only -z/,
2367                                                     $self->{c}, '--', $gpath);
2368                local $/ = "\0";
2369                while (<$ls>) {
2370                        chomp;
2371                        $self->{gii}->remove($_);
2372                        print "\tD\t$_\n" unless $::_q;
2373                }
2374                print "\tD\t$gpath/\n" unless $::_q;
2375                command_close_pipe($ls, $ctx);
2376                $self->{empty}->{$path} = 0
2377        } else {
2378                $self->{gii}->remove($gpath);
2379                print "\tD\t$gpath\n" unless $::_q;
2380        }
2381        undef;
2382}
2383
2384sub open_file {
2385        my ($self, $path, $pb, $rev) = @_;
2386        my $gpath = $self->git_path($path);
2387        my ($mode, $blob) = (command('ls-tree', $self->{c}, '--', $gpath)
2388                             =~ /^(\d{6}) blob ([a-f\d]{40})\t/);
2389        unless (defined $mode && defined $blob) {
2390                die "$path was not found in commit $self->{c} (r$rev)\n";
2391        }
2392        { path => $path, mode_a => $mode, mode_b => $mode, blob => $blob,
2393          pool => SVN::Pool->new, action => 'M' };
2394}
2395
2396sub add_file {
2397        my ($self, $path, $pb, $cp_path, $cp_rev) = @_;
2398        my ($dir, $file) = ($path =~ m#^(.*?)/?([^/]+)$#);
2399        delete $self->{empty}->{$dir};
2400        { path => $path, mode_a => 100644, mode_b => 100644,
2401          pool => SVN::Pool->new, action => 'A' };
2402}
2403
2404sub add_directory {
2405        my ($self, $path, $cp_path, $cp_rev) = @_;
2406        my ($dir, $file) = ($path =~ m#^(.*?)/?([^/]+)$#);
2407        delete $self->{empty}->{$dir};
2408        $self->{empty}->{$path} = 1;
2409        { path => $path };
2410}
2411
2412sub change_dir_prop {
2413        my ($self, $db, $prop, $value) = @_;
2414        $self->{dir_prop}->{$db->{path}} ||= {};
2415        $self->{dir_prop}->{$db->{path}}->{$prop} = $value;
2416        undef;
2417}
2418
2419sub absent_directory {
2420        my ($self, $path, $pb) = @_;
2421        $self->{absent_dir}->{$pb->{path}} ||= [];
2422        push @{$self->{absent_dir}->{$pb->{path}}}, $path;
2423        undef;
2424}
2425
2426sub absent_file {
2427        my ($self, $path, $pb) = @_;
2428        $self->{absent_file}->{$pb->{path}} ||= [];
2429        push @{$self->{absent_file}->{$pb->{path}}}, $path;
2430        undef;
2431}
2432
2433sub change_file_prop {
2434        my ($self, $fb, $prop, $value) = @_;
2435        if ($prop eq 'svn:executable') {
2436                if ($fb->{mode_b} != 120000) {
2437                        $fb->{mode_b} = defined $value ? 100755 : 100644;
2438                }
2439        } elsif ($prop eq 'svn:special') {
2440                $fb->{mode_b} = defined $value ? 120000 : 100644;
2441        } else {
2442                $self->{file_prop}->{$fb->{path}} ||= {};
2443                $self->{file_prop}->{$fb->{path}}->{$prop} = $value;
2444        }
2445        undef;
2446}
2447
2448sub apply_textdelta {
2449        my ($self, $fb, $exp) = @_;
2450        my $fh = IO::File->new_tmpfile;
2451        $fh->autoflush(1);
2452        # $fh gets auto-closed() by SVN::TxDelta::apply(),
2453        # (but $base does not,) so dup() it for reading in close_file
2454        open my $dup, '<&', $fh or croak $!;
2455        my $base = IO::File->new_tmpfile;
2456        $base->autoflush(1);
2457        if ($fb->{blob}) {
2458                defined (my $pid = fork) or croak $!;
2459                if (!$pid) {
2460                        open STDOUT, '>&', $base or croak $!;
2461                        print STDOUT 'link ' if ($fb->{mode_a} == 120000);
2462                        exec qw/git-cat-file blob/, $fb->{blob} or croak $!;
2463                }
2464                waitpid $pid, 0;
2465                croak $? if $?;
2466
2467                if (defined $exp) {
2468                        seek $base, 0, 0 or croak $!;
2469                        my $md5 = Digest::MD5->new;
2470                        $md5->addfile($base);
2471                        my $got = $md5->hexdigest;
2472                        die "Checksum mismatch: $fb->{path} $fb->{blob}\n",
2473                            "expected: $exp\n",
2474                            "     got: $got\n" if ($got ne $exp);
2475                }
2476        }
2477        seek $base, 0, 0 or croak $!;
2478        $fb->{fh} = $dup;
2479        $fb->{base} = $base;
2480        [ SVN::TxDelta::apply($base, $fh, undef, $fb->{path}, $fb->{pool}) ];
2481}
2482
2483sub close_file {
2484        my ($self, $fb, $exp) = @_;
2485        my $hash;
2486        my $path = $self->git_path($fb->{path});
2487        if (my $fh = $fb->{fh}) {
2488                if (defined $exp) {
2489                        seek($fh, 0, 0) or croak $!;
2490                        my $md5 = Digest::MD5->new;
2491                        $md5->addfile($fh);
2492                        my $got = $md5->hexdigest;
2493                        if ($got ne $exp) {
2494                                die "Checksum mismatch: $path\n",
2495                                    "expected: $exp\n    got: $got\n";
2496                        }
2497                }
2498                sysseek($fh, 0, 0) or croak $!;
2499                if ($fb->{mode_b} == 120000) {
2500                        sysread($fh, my $buf, 5) == 5 or croak $!;
2501                        $buf eq 'link ' or die "$path has mode 120000",
2502                                               "but is not a link\n";
2503                }
2504                defined(my $pid = open my $out,'-|') or die "Can't fork: $!\n";
2505                if (!$pid) {
2506                        open STDIN, '<&', $fh or croak $!;
2507                        exec qw/git-hash-object -w --stdin/ or croak $!;
2508                }
2509                chomp($hash = do { local $/; <$out> });
2510                close $out or croak $!;
2511                close $fh or croak $!;
2512                $hash =~ /^[a-f\d]{40}$/ or die "not a sha1: $hash\n";
2513                close $fb->{base} or croak $!;
2514        } else {
2515                $hash = $fb->{blob} or die "no blob information\n";
2516        }
2517        $fb->{pool}->clear;
2518        $self->{gii}->update($fb->{mode_b}, $hash, $path) or croak $!;
2519        print "\t$fb->{action}\t$path\n" if $fb->{action} && ! $::_q;
2520        undef;
2521}
2522
2523sub abort_edit {
2524        my $self = shift;
2525        $self->{nr} = $self->{gii}->{nr};
2526        delete $self->{gii};
2527        $self->SUPER::abort_edit(@_);
2528}
2529
2530sub close_edit {
2531        my $self = shift;
2532        $self->{git_commit_ok} = 1;
2533        $self->{nr} = $self->{gii}->{nr};
2534        delete $self->{gii};
2535        $self->SUPER::close_edit(@_);
2536}
2537
2538package SVN::Git::Editor;
2539use vars qw/@ISA $_rmdir $_cp_similarity $_find_copies_harder $_rename_limit/;
2540use strict;
2541use warnings;
2542use Carp qw/croak/;
2543use IO::File;
2544use Digest::MD5;
2545
2546sub new {
2547        my ($class, $opts) = @_;
2548        foreach (qw/svn_path r ra tree_a tree_b log editor_cb/) {
2549                die "$_ required!\n" unless (defined $opts->{$_});
2550        }
2551
2552        my $pool = SVN::Pool->new;
2553        my $mods = generate_diff($opts->{tree_a}, $opts->{tree_b});
2554        my $types = check_diff_paths($opts->{ra}, $opts->{svn_path},
2555                                     $opts->{r}, $mods);
2556
2557        # $opts->{ra} functions should not be used after this:
2558        my @ce  = $opts->{ra}->get_commit_editor($opts->{log},
2559                                                $opts->{editor_cb}, $pool);
2560        my $self = SVN::Delta::Editor->new(@ce, $pool);
2561        bless $self, $class;
2562        foreach (qw/svn_path r tree_a tree_b/) {
2563                $self->{$_} = $opts->{$_};
2564        }
2565        $self->{url} = $opts->{ra}->{url};
2566        $self->{mods} = $mods;
2567        $self->{types} = $types;
2568        $self->{pool} = $pool;
2569        $self->{bat} = { '' => $self->open_root($self->{r}, $self->{pool}) };
2570        $self->{rm} = { };
2571        $self->{path_prefix} = length $self->{svn_path} ?
2572                               "$self->{svn_path}/" : '';
2573        return $self;
2574}
2575
2576sub generate_diff {
2577        my ($tree_a, $tree_b) = @_;
2578        my @diff_tree = qw(diff-tree -z -r);
2579        if ($_cp_similarity) {
2580                push @diff_tree, "-C$_cp_similarity";
2581        } else {
2582                push @diff_tree, '-C';
2583        }
2584        push @diff_tree, '--find-copies-harder' if $_find_copies_harder;
2585        push @diff_tree, "-l$_rename_limit" if defined $_rename_limit;
2586        push @diff_tree, $tree_a, $tree_b;
2587        my ($diff_fh, $ctx) = command_output_pipe(@diff_tree);
2588        local $/ = "\0";
2589        my $state = 'meta';
2590        my @mods;
2591        while (<$diff_fh>) {
2592                chomp $_; # this gets rid of the trailing "\0"
2593                if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s
2594                                        $::sha1\s($::sha1)\s
2595                                        ([MTCRAD])\d*$/xo) {
2596                        push @mods, {   mode_a => $1, mode_b => $2,
2597                                        sha1_b => $3, chg => $4 };
2598                        if ($4 =~ /^(?:C|R)$/) {
2599                                $state = 'file_a';
2600                        } else {
2601                                $state = 'file_b';
2602                        }
2603                } elsif ($state eq 'file_a') {
2604                        my $x = $mods[$#mods] or croak "Empty array\n";
2605                        if ($x->{chg} !~ /^(?:C|R)$/) {
2606                                croak "Error parsing $_, $x->{chg}\n";
2607                        }
2608                        $x->{file_a} = $_;
2609                        $state = 'file_b';
2610                } elsif ($state eq 'file_b') {
2611                        my $x = $mods[$#mods] or croak "Empty array\n";
2612                        if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) {
2613                                croak "Error parsing $_, $x->{chg}\n";
2614                        }
2615                        if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) {
2616                                croak "Error parsing $_, $x->{chg}\n";
2617                        }
2618                        $x->{file_b} = $_;
2619                        $state = 'meta';
2620                } else {
2621                        croak "Error parsing $_\n";
2622                }
2623        }
2624        command_close_pipe($diff_fh, $ctx);
2625        \@mods;
2626}
2627
2628sub check_diff_paths {
2629        my ($ra, $pfx, $rev, $mods) = @_;
2630        my %types;
2631        $pfx .= '/' if length $pfx;
2632
2633        sub type_diff_paths {
2634                my ($ra, $types, $path, $rev) = @_;
2635                my @p = split m#/+#, $path;
2636                my $c = shift @p;
2637                unless (defined $types->{$c}) {
2638                        $types->{$c} = $ra->check_path($c, $rev);
2639                }
2640                while (@p) {
2641                        $c .= '/' . shift @p;
2642                        next if defined $types->{$c};
2643                        $types->{$c} = $ra->check_path($c, $rev);
2644                }
2645        }
2646
2647        foreach my $m (@$mods) {
2648                foreach my $f (qw/file_a file_b/) {
2649                        next unless defined $m->{$f};
2650                        my ($dir) = ($m->{$f} =~ m#^(.*?)/?(?:[^/]+)$#);
2651                        if (length $pfx.$dir && ! defined $types{$dir}) {
2652                                type_diff_paths($ra, \%types, $pfx.$dir, $rev);
2653                        }
2654                }
2655        }
2656        \%types;
2657}
2658
2659sub split_path {
2660        return ($_[0] =~ m#^(.*?)/?([^/]+)$#);
2661}
2662
2663sub repo_path {
2664        my ($self, $path) = @_;
2665        $self->{path_prefix}.(defined $path ? $path : '');
2666}
2667
2668sub url_path {
2669        my ($self, $path) = @_;
2670        $self->{url} . '/' . $self->repo_path($path);
2671}
2672
2673sub rmdirs {
2674        my ($self) = @_;
2675        my $rm = $self->{rm};
2676        delete $rm->{''}; # we never delete the url we're tracking
2677        return unless %$rm;
2678
2679        foreach (keys %$rm) {
2680                my @d = split m#/#, $_;
2681                my $c = shift @d;
2682                $rm->{$c} = 1;
2683                while (@d) {
2684                        $c .= '/' . shift @d;
2685                        $rm->{$c} = 1;
2686                }
2687        }
2688        delete $rm->{$self->{svn_path}};
2689        delete $rm->{''}; # we never delete the url we're tracking
2690        return unless %$rm;
2691
2692        my ($fh, $ctx) = command_output_pipe(qw/ls-tree --name-only -r -z/,
2693                                             $self->{tree_b});
2694        local $/ = "\0";
2695        while (<$fh>) {
2696                chomp;
2697                my @dn = split m#/#, $_;
2698                while (pop @dn) {
2699                        delete $rm->{join '/', @dn};
2700                }
2701                unless (%$rm) {
2702                        close $fh;
2703                        return;
2704                }
2705        }
2706        command_close_pipe($fh, $ctx);
2707
2708        my ($r, $p, $bat) = ($self->{r}, $self->{pool}, $self->{bat});
2709        foreach my $d (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$rm) {
2710                $self->close_directory($bat->{$d}, $p);
2711                my ($dn) = ($d =~ m#^(.*?)/?(?:[^/]+)$#);
2712                print "\tD+\t$d/\n" unless $::_q;
2713                $self->SUPER::delete_entry($d, $r, $bat->{$dn}, $p);
2714                delete $bat->{$d};
2715        }
2716}
2717
2718sub open_or_add_dir {
2719        my ($self, $full_path, $baton) = @_;
2720        my $t = $self->{types}->{$full_path};
2721        if (!defined $t) {
2722                die "$full_path not known in r$self->{r} or we have a bug!\n";
2723        }
2724        if ($t == $SVN::Node::none) {
2725                return $self->add_directory($full_path, $baton,
2726                                                undef, -1, $self->{pool});
2727        } elsif ($t == $SVN::Node::dir) {
2728                return $self->open_directory($full_path, $baton,
2729                                                $self->{r}, $self->{pool});
2730        }
2731        print STDERR "$full_path already exists in repository at ",
2732                "r$self->{r} and it is not a directory (",
2733                ($t == $SVN::Node::file ? 'file' : 'unknown'),"/$t)\n";
2734        exit 1;
2735}
2736
2737sub ensure_path {
2738        my ($self, $path) = @_;
2739        my $bat = $self->{bat};
2740        my $repo_path = $self->repo_path($path);
2741        return $bat->{''} unless (length $repo_path);
2742        my @p = split m#/+#, $repo_path;
2743        my $c = shift @p;
2744        $bat->{$c} ||= $self->open_or_add_dir($c, $bat->{''});
2745        while (@p) {
2746                my $c0 = $c;
2747                $c .= '/' . shift @p;
2748                $bat->{$c} ||= $self->open_or_add_dir($c, $bat->{$c0});
2749        }
2750        return $bat->{$c};
2751}
2752
2753sub A {
2754        my ($self, $m) = @_;
2755        my ($dir, $file) = split_path($m->{file_b});
2756        my $pbat = $self->ensure_path($dir);
2757        my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
2758                                        undef, -1);
2759        print "\tA\t$m->{file_b}\n" unless $::_q;
2760        $self->chg_file($fbat, $m);
2761        $self->close_file($fbat,undef,$self->{pool});
2762}
2763
2764sub C {
2765        my ($self, $m) = @_;
2766        my ($dir, $file) = split_path($m->{file_b});
2767        my $pbat = $self->ensure_path($dir);
2768        my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
2769                                $self->url_path($m->{file_a}), $self->{r});
2770        print "\tC\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
2771        $self->chg_file($fbat, $m);
2772        $self->close_file($fbat,undef,$self->{pool});
2773}
2774
2775sub delete_entry {
2776        my ($self, $path, $pbat) = @_;
2777        my $rpath = $self->repo_path($path);
2778        my ($dir, $file) = split_path($rpath);
2779        $self->{rm}->{$dir} = 1;
2780        $self->SUPER::delete_entry($rpath, $self->{r}, $pbat, $self->{pool});
2781}
2782
2783sub R {
2784        my ($self, $m) = @_;
2785        my ($dir, $file) = split_path($m->{file_b});
2786        my $pbat = $self->ensure_path($dir);
2787        my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
2788                                $self->url_path($m->{file_a}), $self->{r});
2789        print "\tR\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
2790        $self->chg_file($fbat, $m);
2791        $self->close_file($fbat,undef,$self->{pool});
2792
2793        ($dir, $file) = split_path($m->{file_a});
2794        $pbat = $self->ensure_path($dir);
2795        $self->delete_entry($m->{file_a}, $pbat);
2796}
2797
2798sub M {
2799        my ($self, $m) = @_;
2800        my ($dir, $file) = split_path($m->{file_b});
2801        my $pbat = $self->ensure_path($dir);
2802        my $fbat = $self->open_file($self->repo_path($m->{file_b}),
2803                                $pbat,$self->{r},$self->{pool});
2804        print "\t$m->{chg}\t$m->{file_b}\n" unless $::_q;
2805        $self->chg_file($fbat, $m);
2806        $self->close_file($fbat,undef,$self->{pool});
2807}
2808
2809sub T { shift->M(@_) }
2810
2811sub change_file_prop {
2812        my ($self, $fbat, $pname, $pval) = @_;
2813        $self->SUPER::change_file_prop($fbat, $pname, $pval, $self->{pool});
2814}
2815
2816sub chg_file {
2817        my ($self, $fbat, $m) = @_;
2818        if ($m->{mode_b} =~ /755$/ && $m->{mode_a} !~ /755$/) {
2819                $self->change_file_prop($fbat,'svn:executable','*');
2820        } elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) {
2821                $self->change_file_prop($fbat,'svn:executable',undef);
2822        }
2823        my $fh = IO::File->new_tmpfile or croak $!;
2824        if ($m->{mode_b} =~ /^120/) {
2825                print $fh 'link ' or croak $!;
2826                $self->change_file_prop($fbat,'svn:special','*');
2827        } elsif ($m->{mode_a} =~ /^120/ && $m->{mode_b} !~ /^120/) {
2828                $self->change_file_prop($fbat,'svn:special',undef);
2829        }
2830        defined(my $pid = fork) or croak $!;
2831        if (!$pid) {
2832                open STDOUT, '>&', $fh or croak $!;
2833                exec qw/git-cat-file blob/, $m->{sha1_b} or croak $!;
2834        }
2835        waitpid $pid, 0;
2836        croak $? if $?;
2837        $fh->flush == 0 or croak $!;
2838        seek $fh, 0, 0 or croak $!;
2839
2840        my $md5 = Digest::MD5->new;
2841        $md5->addfile($fh) or croak $!;
2842        seek $fh, 0, 0 or croak $!;
2843
2844        my $exp = $md5->hexdigest;
2845        my $pool = SVN::Pool->new;
2846        my $atd = $self->apply_textdelta($fbat, undef, $pool);
2847        my $got = SVN::TxDelta::send_stream($fh, @$atd, $pool);
2848        die "Checksum mismatch\nexpected: $exp\ngot: $got\n" if ($got ne $exp);
2849        $pool->clear;
2850
2851        close $fh or croak $!;
2852}
2853
2854sub D {
2855        my ($self, $m) = @_;
2856        my ($dir, $file) = split_path($m->{file_b});
2857        my $pbat = $self->ensure_path($dir);
2858        print "\tD\t$m->{file_b}\n" unless $::_q;
2859        $self->delete_entry($m->{file_b}, $pbat);
2860}
2861
2862sub close_edit {
2863        my ($self) = @_;
2864        my ($p,$bat) = ($self->{pool}, $self->{bat});
2865        foreach (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$bat) {
2866                next if $_ eq '';
2867                $self->close_directory($bat->{$_}, $p);
2868        }
2869        $self->close_directory($bat->{''}, $p);
2870        $self->SUPER::close_edit($p);
2871        $p->clear;
2872}
2873
2874sub abort_edit {
2875        my ($self) = @_;
2876        $self->SUPER::abort_edit($self->{pool});
2877}
2878
2879sub DESTROY {
2880        my $self = shift;
2881        $self->SUPER::DESTROY(@_);
2882        $self->{pool}->clear;
2883}
2884
2885# this drives the editor
2886sub apply_diff {
2887        my ($self) = @_;
2888        my $mods = $self->{mods};
2889        my %o = ( D => 1, R => 0, C => -1, A => 3, M => 3, T => 3 );
2890        foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) {
2891                my $f = $m->{chg};
2892                if (defined $o{$f}) {
2893                        $self->$f($m);
2894                } else {
2895                        fatal("Invalid change type: $f\n");
2896                }
2897        }
2898        $self->rmdirs if $_rmdir;
2899        if (@$mods == 0) {
2900                $self->abort_edit;
2901        } else {
2902                $self->close_edit;
2903        }
2904        return scalar @$mods;
2905}
2906
2907package Git::SVN::Ra;
2908use vars qw/@ISA $config_dir $_log_window_size/;
2909use strict;
2910use warnings;
2911my ($can_do_switch, %ignored_err, $RA);
2912
2913BEGIN {
2914        # enforce temporary pool usage for some simple functions
2915        no strict 'refs';
2916        for my $f (qw/rev_proplist get_latest_revnum get_uuid get_repos_root/) {
2917                my $SUPER = "SUPER::$f";
2918                *$f = sub {
2919                        my $self = shift;
2920                        my $pool = SVN::Pool->new;
2921                        my @ret = $self->$SUPER(@_,$pool);
2922                        $pool->clear;
2923                        wantarray ? @ret : $ret[0];
2924                };
2925        }
2926}
2927
2928sub new {
2929        my ($class, $url) = @_;
2930        $url =~ s!/+$!!;
2931        return $RA if ($RA && $RA->{url} eq $url);
2932
2933        SVN::_Core::svn_config_ensure($config_dir, undef);
2934        my ($baton, $callbacks) = SVN::Core::auth_open_helper([
2935            SVN::Client::get_simple_provider(),
2936            SVN::Client::get_ssl_server_trust_file_provider(),
2937            SVN::Client::get_simple_prompt_provider(
2938              \&Git::SVN::Prompt::simple, 2),
2939            SVN::Client::get_ssl_client_cert_file_provider(),
2940            SVN::Client::get_ssl_client_cert_prompt_provider(
2941              \&Git::SVN::Prompt::ssl_client_cert, 2),
2942            SVN::Client::get_ssl_client_cert_pw_prompt_provider(
2943              \&Git::SVN::Prompt::ssl_client_cert_pw, 2),
2944            SVN::Client::get_username_provider(),
2945            SVN::Client::get_ssl_server_trust_prompt_provider(
2946              \&Git::SVN::Prompt::ssl_server_trust),
2947            SVN::Client::get_username_prompt_provider(
2948              \&Git::SVN::Prompt::username, 2),
2949          ]);
2950        my $config = SVN::Core::config_get_config($config_dir);
2951        my $self = SVN::Ra->new(url => $url, auth => $baton,
2952                              config => $config,
2953                              pool => SVN::Pool->new,
2954                              auth_provider_callbacks => $callbacks);
2955        $self->{svn_path} = $url;
2956        $self->{repos_root} = $self->get_repos_root;
2957        $self->{svn_path} =~ s#^\Q$self->{repos_root}\E(/|$)##;
2958        $self->{cache} = { check_path => { r => 0, data => {} },
2959                           get_dir => { r => 0, data => {} } };
2960        $RA = bless $self, $class;
2961}
2962
2963sub check_path {
2964        my ($self, $path, $r) = @_;
2965        my $cache = $self->{cache}->{check_path};
2966        if ($r == $cache->{r} && exists $cache->{data}->{$path}) {
2967                return $cache->{data}->{$path};
2968        }
2969        my $pool = SVN::Pool->new;
2970        my $t = $self->SUPER::check_path($path, $r, $pool);
2971        $pool->clear;
2972        if ($r != $cache->{r}) {
2973                %{$cache->{data}} = ();
2974                $cache->{r} = $r;
2975        }
2976        $cache->{data}->{$path} = $t;
2977}
2978
2979sub get_dir {
2980        my ($self, $dir, $r) = @_;
2981        my $cache = $self->{cache}->{get_dir};
2982        if ($r == $cache->{r}) {
2983                if (my $x = $cache->{data}->{$dir}) {
2984                        return wantarray ? @$x : $x->[0];
2985                }
2986        }
2987        my $pool = SVN::Pool->new;
2988        my ($d, undef, $props) = $self->SUPER::get_dir($dir, $r, $pool);
2989        my %dirents = map { $_ => { kind => $d->{$_}->kind } } keys %$d;
2990        $pool->clear;
2991        if ($r != $cache->{r}) {
2992                %{$cache->{data}} = ();
2993                $cache->{r} = $r;
2994        }
2995        $cache->{data}->{$dir} = [ \%dirents, $r, $props ];
2996        wantarray ? (\%dirents, $r, $props) : \%dirents;
2997}
2998
2999sub DESTROY {
3000        # do not call the real DESTROY since we store ourselves in $RA
3001}
3002
3003sub get_log {
3004        my ($self, @args) = @_;
3005        my $pool = SVN::Pool->new;
3006        splice(@args, 3, 1) if ($SVN::Core::VERSION le '1.2.0');
3007        my $ret = $self->SUPER::get_log(@args, $pool);
3008        $pool->clear;
3009        $ret;
3010}
3011
3012sub get_commit_editor {
3013        my ($self, $log, $cb, $pool) = @_;
3014        my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef, 0) : ();
3015        $self->SUPER::get_commit_editor($log, $cb, @lock, $pool);
3016}
3017
3018sub gs_do_update {
3019        my ($self, $rev_a, $rev_b, $gs, $editor) = @_;
3020        my $new = ($rev_a == $rev_b);
3021        my $path = $gs->{path};
3022
3023        if ($new && -e $gs->{index}) {
3024                unlink $gs->{index} or die
3025                  "Couldn't unlink index: $gs->{index}: $!\n";
3026        }
3027        my $pool = SVN::Pool->new;
3028        $editor->set_path_strip($path);
3029        my (@pc) = split m#/#, $path;
3030        my $reporter = $self->do_update($rev_b, (@pc ? shift @pc : ''),
3031                                        1, $editor, $pool);
3032        my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef) : ();
3033
3034        # Since we can't rely on svn_ra_reparent being available, we'll
3035        # just have to do some magic with set_path to make it so
3036        # we only want a partial path.
3037        my $sp = '';
3038        my $final = join('/', @pc);
3039        while (@pc) {
3040                $reporter->set_path($sp, $rev_b, 0, @lock, $pool);
3041                $sp .= '/' if length $sp;
3042                $sp .= shift @pc;
3043        }
3044        die "BUG: '$sp' != '$final'\n" if ($sp ne $final);
3045
3046        $reporter->set_path($sp, $rev_a, $new, @lock, $pool);
3047
3048        $reporter->finish_report($pool);
3049        $pool->clear;
3050        $editor->{git_commit_ok};
3051}
3052
3053# this requires SVN 1.4.3 or later (do_switch didn't work before 1.4.3, and
3054# svn_ra_reparent didn't work before 1.4)
3055sub gs_do_switch {
3056        my ($self, $rev_a, $rev_b, $gs, $url_b, $editor) = @_;
3057        my $path = $gs->{path};
3058        my $pool = SVN::Pool->new;
3059
3060        my $full_url = $self->{url};
3061        my $old_url = $full_url;
3062        $full_url .= "/$path" if length $path;
3063        my ($ra, $reparented);
3064        if ($old_url ne $full_url) {
3065                if ($old_url !~ m#^svn(\+ssh)?://#) {
3066                        SVN::_Ra::svn_ra_reparent($self->{session}, $full_url,
3067                                                  $pool);
3068                        $self->{url} = $full_url;
3069                        $reparented = 1;
3070                } else {
3071                        $ra = Git::SVN::Ra->new($full_url);
3072                }
3073        }
3074        $ra ||= $self;
3075        my $reporter = $ra->do_switch($rev_b, '', 1, $url_b, $editor, $pool);
3076        my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef) : ();
3077        $reporter->set_path('', $rev_a, 0, @lock, $pool);
3078        $reporter->finish_report($pool);
3079
3080        if ($reparented) {
3081                SVN::_Ra::svn_ra_reparent($self->{session}, $old_url, $pool);
3082                $self->{url} = $old_url;
3083        }
3084
3085        $pool->clear;
3086        $editor->{git_commit_ok};
3087}
3088
3089sub longest_common_path {
3090        my ($gsv, $globs) = @_;
3091        my %common;
3092        my $common_max = scalar @$gsv;
3093
3094        foreach my $gs (@$gsv) {
3095                my @tmp = split m#/#, $gs->{path};
3096                my $p = '';
3097                foreach (@tmp) {
3098                        $p .= length($p) ? "/$_" : $_;
3099                        $common{$p} ||= 0;
3100                        $common{$p}++;
3101                }
3102        }
3103        $globs ||= [];
3104        $common_max += scalar @$globs;
3105        foreach my $glob (@$globs) {
3106                my @tmp = split m#/#, $glob->{path}->{left};
3107                my $p = '';
3108                foreach (@tmp) {
3109                        $p .= length($p) ? "/$_" : $_;
3110                        $common{$p} ||= 0;
3111                        $common{$p}++;
3112                }
3113        }
3114
3115        my $longest_path = '';
3116        foreach (sort {length $b <=> length $a} keys %common) {
3117                if ($common{$_} == $common_max) {
3118                        $longest_path = $_;
3119                        last;
3120                }
3121        }
3122        $longest_path;
3123}
3124
3125sub gs_fetch_loop_common {
3126        my ($self, $base, $head, $gsv, $globs) = @_;
3127        return if ($base > $head);
3128        my $inc = $_log_window_size;
3129        my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
3130        my $longest_path = longest_common_path($gsv, $globs);
3131        while (1) {
3132                my %revs;
3133                my $err;
3134                my $err_handler = $SVN::Error::handler;
3135                $SVN::Error::handler = sub {
3136                        ($err) = @_;
3137                        skip_unknown_revs($err);
3138                };
3139                sub _cb {
3140                        my ($paths, $r, $author, $date, $log) = @_;
3141                        [ dup_changed_paths($paths),
3142                          { author => $author, date => $date, log => $log } ];
3143                }
3144                $self->get_log([$longest_path], $min, $max, 0, 1, 1,
3145                               sub { $revs{$_[1]} = _cb(@_) });
3146                if ($err && $max >= $head) {
3147                        print STDERR "Path '$longest_path' ",
3148                                     "was probably deleted:\n",
3149                                     $err->expanded_message,
3150                                     "\nWill attempt to follow ",
3151                                     "revisions r$min .. r$max ",
3152                                     "committed before the deletion\n";
3153                        my $hi = $max;
3154                        while (--$hi >= $min) {
3155                                my $ok;
3156                                $self->get_log([$longest_path], $min, $hi,
3157                                               0, 1, 1, sub {
3158                                               $ok ||= $_[1];
3159                                               $revs{$_[1]} = _cb(@_) });
3160                                if ($ok) {
3161                                        print STDERR "r$min .. r$ok OK\n";
3162                                        last;
3163                                }
3164                        }
3165                }
3166                $SVN::Error::handler = $err_handler;
3167
3168                my %exists = map { $_->{path} => $_ } @$gsv;
3169                foreach my $r (sort {$a <=> $b} keys %revs) {
3170                        my ($paths, $logged) = @{$revs{$r}};
3171
3172                        foreach my $gs ($self->match_globs(\%exists, $paths,
3173                                                           $globs, $r)) {
3174                                if ($gs->rev_db_max >= $r) {
3175                                        next;
3176                                }
3177                                next unless $gs->match_paths($paths, $r);
3178                                $gs->{logged_rev_props} = $logged;
3179                                if (my $last_commit = $gs->last_commit) {
3180                                        $gs->assert_index_clean($last_commit);
3181                                }
3182                                my $log_entry = $gs->do_fetch($paths, $r);
3183                                if ($log_entry) {
3184                                        $gs->do_git_commit($log_entry);
3185                                }
3186                        }
3187                        foreach my $g (@$globs) {
3188                                my $k = "svn-remote.$g->{remote}." .
3189                                        "$g->{t}-maxRev";
3190                                Git::SVN::tmp_config($k, $r);
3191                        }
3192                }
3193                # pre-fill the .rev_db since it'll eventually get filled in
3194                # with '0' x40 if something new gets committed
3195                foreach my $gs (@$gsv) {
3196                        next if defined $gs->rev_db_get($max);
3197                        $gs->rev_db_set($max, 0 x40);
3198                }
3199                foreach my $g (@$globs) {
3200                        my $k = "svn-remote.$g->{remote}.$g->{t}-maxRev";
3201                        Git::SVN::tmp_config($k, $max);
3202                }
3203                last if $max >= $head;
3204                $min = $max + 1;
3205                $max += $inc;
3206                $max = $head if ($max > $head);
3207        }
3208}
3209
3210sub match_globs {
3211        my ($self, $exists, $paths, $globs, $r) = @_;
3212
3213        sub get_dir_check {
3214                my ($self, $exists, $g, $r) = @_;
3215                my @x = eval { $self->get_dir($g->{path}->{left}, $r) };
3216                return unless scalar @x == 3;
3217                my $dirents = $x[0];
3218                foreach my $de (keys %$dirents) {
3219                        next if $dirents->{$de}->{kind} != $SVN::Node::dir;
3220                        my $p = $g->{path}->full_path($de);
3221                        next if $exists->{$p};
3222                        next if (length $g->{path}->{right} &&
3223                                 ($self->check_path($p, $r) !=
3224                                  $SVN::Node::dir));
3225                        $exists->{$p} = Git::SVN->init($self->{url}, $p, undef,
3226                                         $g->{ref}->full_path($de), 1);
3227                }
3228        }
3229        foreach my $g (@$globs) {
3230                if (my $path = $paths->{"/$g->{path}->{left}"}) {
3231                        if ($path->{action} =~ /^[AR]$/) {
3232                                get_dir_check($self, $exists, $g, $r);
3233                        }
3234                }
3235                foreach (keys %$paths) {
3236                        if (/$g->{path}->{left_regex}/ &&
3237                            !/$g->{path}->{regex}/) {
3238                                next if $paths->{$_}->{action} !~ /^[AR]$/;
3239                                get_dir_check($self, $exists, $g, $r);
3240                        }
3241                        next unless /$g->{path}->{regex}/;
3242                        my $p = $1;
3243                        my $pathname = $g->{path}->full_path($p);
3244                        next if $exists->{$pathname};
3245                        next if ($self->check_path($pathname, $r) !=
3246                                 $SVN::Node::dir);
3247                        $exists->{$pathname} = Git::SVN->init(
3248                                              $self->{url}, $pathname, undef,
3249                                              $g->{ref}->full_path($p), 1);
3250                }
3251                my $c = '';
3252                foreach (split m#/#, $g->{path}->{left}) {
3253                        $c .= "/$_";
3254                        next unless ($paths->{$c} &&
3255                                     ($paths->{$c}->{action} =~ /^[AR]$/));
3256                        get_dir_check($self, $exists, $g, $r);
3257                }
3258        }
3259        values %$exists;
3260}
3261
3262sub minimize_url {
3263        my ($self) = @_;
3264        return $self->{url} if ($self->{url} eq $self->{repos_root});
3265        my $url = $self->{repos_root};
3266        my @components = split(m!/!, $self->{svn_path});
3267        my $c = '';
3268        do {
3269                $url .= "/$c" if length $c;
3270                eval { (ref $self)->new($url)->get_latest_revnum };
3271        } while ($@ && ($c = shift @components));
3272        $url;
3273}
3274
3275sub can_do_switch {
3276        my $self = shift;
3277        unless (defined $can_do_switch) {
3278                my $pool = SVN::Pool->new;
3279                my $rep = eval {
3280                        $self->do_switch(1, '', 0, $self->{url},
3281                                         SVN::Delta::Editor->new, $pool);
3282                };
3283                if ($@) {
3284                        $can_do_switch = 0;
3285                } else {
3286                        $rep->abort_report($pool);
3287                        $can_do_switch = 1;
3288                }
3289                $pool->clear;
3290        }
3291        $can_do_switch;
3292}
3293
3294sub skip_unknown_revs {
3295        my ($err) = @_;
3296        my $errno = $err->apr_err();
3297        # Maybe the branch we're tracking didn't
3298        # exist when the repo started, so it's
3299        # not an error if it doesn't, just continue
3300        #
3301        # Wonderfully consistent library, eh?
3302        # 160013 - svn:// and file://
3303        # 175002 - http(s)://
3304        # 175007 - http(s):// (this repo required authorization, too...)
3305        #   More codes may be discovered later...
3306        if ($errno == 175007 || $errno == 175002 || $errno == 160013) {
3307                my $err_key = $err->expanded_message;
3308                # revision numbers change every time, filter them out
3309                $err_key =~ s/\d+/\0/g;
3310                $err_key = "$errno\0$err_key";
3311                unless ($ignored_err{$err_key}) {
3312                        warn "W: Ignoring error from SVN, path probably ",
3313                             "does not exist: ($errno): ",
3314                             $err->expanded_message,"\n";
3315                        $ignored_err{$err_key} = 1;
3316                }
3317                return;
3318        }
3319        die "Error from SVN, ($errno): ", $err->expanded_message,"\n";
3320}
3321
3322# svn_log_changed_path_t objects passed to get_log are likely to be
3323# overwritten even if only the refs are copied to an external variable,
3324# so we should dup the structures in their entirety.  Using an externally
3325# passed pool (instead of our temporary and quickly cleared pool in
3326# Git::SVN::Ra) does not help matters at all...
3327sub dup_changed_paths {
3328        my ($paths) = @_;
3329        return undef unless $paths;
3330        my %ret;
3331        foreach my $p (keys %$paths) {
3332                my $i = $paths->{$p};
3333                my %s = map { $_ => $i->$_ }
3334                              qw/copyfrom_path copyfrom_rev action/;
3335                $ret{$p} = \%s;
3336        }
3337        \%ret;
3338}
3339
3340package Git::SVN::Log;
3341use strict;
3342use warnings;
3343use POSIX qw/strftime/;
3344use vars qw/$TZ $limit $color $pager $non_recursive $verbose $oneline
3345            %rusers $show_commit $incremental/;
3346my $l_fmt;
3347
3348sub cmt_showable {
3349        my ($c) = @_;
3350        return 1 if defined $c->{r};
3351
3352        # big commit message got truncated by the 16k pretty buffer in rev-list
3353        if ($c->{l} && $c->{l}->[-1] eq "...\n" &&
3354                                $c->{a_raw} =~ /\@([a-f\d\-]+)>$/) {
3355                @{$c->{l}} = ();
3356                my @log = command(qw/cat-file commit/, $c->{c});
3357
3358                # shift off the headers
3359                shift @log while ($log[0] ne '');
3360                shift @log;
3361
3362                # TODO: make $c->{l} not have a trailing newline in the future
3363                @{$c->{l}} = map { "$_\n" } grep !/^git-svn-id: /, @log;
3364
3365                (undef, $c->{r}, undef) = ::extract_metadata(
3366                                (grep(/^git-svn-id: /, @log))[-1]);
3367        }
3368        return defined $c->{r};
3369}
3370
3371sub log_use_color {
3372        return 1 if $color;
3373        my ($dc, $dcvar);
3374        $dcvar = 'color.diff';
3375        $dc = `git-config --get $dcvar`;
3376        if ($dc eq '') {
3377                # nothing at all; fallback to "diff.color"
3378                $dcvar = 'diff.color';
3379                $dc = `git-config --get $dcvar`;
3380        }
3381        chomp($dc);
3382        if ($dc eq 'auto') {
3383                my $pc;
3384                $pc = `git-config --get color.pager`;
3385                if ($pc eq '') {
3386                        # does not have it -- fallback to pager.color
3387                        $pc = `git-config --bool --get pager.color`;
3388                }
3389                else {
3390                        $pc = `git-config --bool --get color.pager`;
3391                        if ($?) {
3392                                $pc = 'false';
3393                        }
3394                }
3395                chomp($pc);
3396                if (-t *STDOUT || (defined $pager && $pc eq 'true')) {
3397                        return ($ENV{TERM} && $ENV{TERM} ne 'dumb');
3398                }
3399                return 0;
3400        }
3401        return 0 if $dc eq 'never';
3402        return 1 if $dc eq 'always';
3403        chomp($dc = `git-config --bool --get $dcvar`);
3404        return ($dc eq 'true');
3405}
3406
3407sub git_svn_log_cmd {
3408        my ($r_min, $r_max, @args) = @_;
3409        my $head = 'HEAD';
3410        foreach my $x (@args) {
3411                last if $x eq '--';
3412                next unless ::verify_ref("$x^0");
3413                $head = $x;
3414                last;
3415        }
3416
3417        my ($url, $rev, $uuid, $gs) = ::working_head_info($head);
3418        $gs ||= Git::SVN->_new;
3419        my @cmd = (qw/log --abbrev-commit --pretty=raw --default/,
3420                   $gs->refname);
3421        push @cmd, '-r' unless $non_recursive;
3422        push @cmd, qw/--raw --name-status/ if $verbose;
3423        push @cmd, '--color' if log_use_color();
3424        return @cmd unless defined $r_max;
3425        if ($r_max == $r_min) {
3426                push @cmd, '--max-count=1';
3427                if (my $c = $gs->rev_db_get($r_max)) {
3428                        push @cmd, $c;
3429                }
3430        } else {
3431                my ($c_min, $c_max);
3432                $c_max = $gs->rev_db_get($r_max);
3433                $c_min = $gs->rev_db_get($r_min);
3434                if (defined $c_min && defined $c_max) {
3435                        if ($r_max > $r_max) {
3436                                push @cmd, "$c_min..$c_max";
3437                        } else {
3438                                push @cmd, "$c_max..$c_min";
3439                        }
3440                } elsif ($r_max > $r_min) {
3441                        push @cmd, $c_max;
3442                } else {
3443                        push @cmd, $c_min;
3444                }
3445        }
3446        return @cmd;
3447}
3448
3449# adapted from pager.c
3450sub config_pager {
3451        $pager ||= $ENV{GIT_PAGER} || $ENV{PAGER};
3452        if (!defined $pager) {
3453                $pager = 'less';
3454        } elsif (length $pager == 0 || $pager eq 'cat') {
3455                $pager = undef;
3456        }
3457}
3458
3459sub run_pager {
3460        return unless -t *STDOUT;
3461        pipe my $rfd, my $wfd or return;
3462        defined(my $pid = fork) or ::fatal "Can't fork: $!\n";
3463        if (!$pid) {
3464                open STDOUT, '>&', $wfd or
3465                                     ::fatal "Can't redirect to stdout: $!\n";
3466                return;
3467        }
3468        open STDIN, '<&', $rfd or ::fatal "Can't redirect stdin: $!\n";
3469        $ENV{LESS} ||= 'FRSX';
3470        exec $pager or ::fatal "Can't run pager: $! ($pager)\n";
3471}
3472
3473sub tz_to_s_offset {
3474        my ($tz) = @_;
3475        $tz =~ s/(\d\d)$//;
3476        return ($1 * 60) + ($tz * 3600);
3477}
3478
3479sub get_author_info {
3480        my ($dest, $author, $t, $tz) = @_;
3481        $author =~ s/(?:^\s*|\s*$)//g;
3482        $dest->{a_raw} = $author;
3483        my $au;
3484        if ($::_authors) {
3485                $au = $rusers{$author} || undef;
3486        }
3487        if (!$au) {
3488                ($au) = ($author =~ /<([^>]+)\@[^>]+>$/);
3489        }
3490        $dest->{t} = $t;
3491        $dest->{tz} = $tz;
3492        $dest->{a} = $au;
3493        # Date::Parse isn't in the standard Perl distro :(
3494        if ($tz =~ s/^\+//) {
3495                $t += tz_to_s_offset($tz);
3496        } elsif ($tz =~ s/^\-//) {
3497                $t -= tz_to_s_offset($tz);
3498        }
3499        $dest->{t_utc} = $t;
3500}
3501
3502sub process_commit {
3503        my ($c, $r_min, $r_max, $defer) = @_;
3504        if (defined $r_min && defined $r_max) {
3505                if ($r_min == $c->{r} && $r_min == $r_max) {
3506                        show_commit($c);
3507                        return 0;
3508                }
3509                return 1 if $r_min == $r_max;
3510                if ($r_min < $r_max) {
3511                        # we need to reverse the print order
3512                        return 0 if (defined $limit && --$limit < 0);
3513                        push @$defer, $c;
3514                        return 1;
3515                }
3516                if ($r_min != $r_max) {
3517                        return 1 if ($r_min < $c->{r});
3518                        return 1 if ($r_max > $c->{r});
3519                }
3520        }
3521        return 0 if (defined $limit && --$limit < 0);
3522        show_commit($c);
3523        return 1;
3524}
3525
3526sub show_commit {
3527        my $c = shift;
3528        if ($oneline) {
3529                my $x = "\n";
3530                if (my $l = $c->{l}) {
3531                        while ($l->[0] =~ /^\s*$/) { shift @$l }
3532                        $x = $l->[0];
3533                }
3534                $l_fmt ||= 'A' . length($c->{r});
3535                print 'r',pack($l_fmt, $c->{r}),' | ';
3536                print "$c->{c} | " if $show_commit;
3537                print $x;
3538        } else {
3539                show_commit_normal($c);
3540        }
3541}
3542
3543sub show_commit_changed_paths {
3544        my ($c) = @_;
3545        return unless $c->{changed};
3546        print "Changed paths:\n", @{$c->{changed}};
3547}
3548
3549sub show_commit_normal {
3550        my ($c) = @_;
3551        print '-' x72, "\nr$c->{r} | ";
3552        print "$c->{c} | " if $show_commit;
3553        print "$c->{a} | ", strftime("%Y-%m-%d %H:%M:%S %z (%a, %d %b %Y)",
3554                                 localtime($c->{t_utc})), ' | ';
3555        my $nr_line = 0;
3556
3557        if (my $l = $c->{l}) {
3558                while ($l->[$#$l] eq "\n" && $#$l > 0
3559                                          && $l->[($#$l - 1)] eq "\n") {
3560                        pop @$l;
3561                }
3562                $nr_line = scalar @$l;
3563                if (!$nr_line) {
3564                        print "1 line\n\n\n";
3565                } else {
3566                        if ($nr_line == 1) {
3567                                $nr_line = '1 line';
3568                        } else {
3569                                $nr_line .= ' lines';
3570                        }
3571                        print $nr_line, "\n";
3572                        show_commit_changed_paths($c);
3573                        print "\n";
3574                        print $_ foreach @$l;
3575                }
3576        } else {
3577                print "1 line\n";
3578                show_commit_changed_paths($c);
3579                print "\n";
3580
3581        }
3582        foreach my $x (qw/raw stat diff/) {
3583                if ($c->{$x}) {
3584                        print "\n";
3585                        print $_ foreach @{$c->{$x}}
3586                }
3587        }
3588}
3589
3590sub cmd_show_log {
3591        my (@args) = @_;
3592        my ($r_min, $r_max);
3593        my $r_last = -1; # prevent dupes
3594        if (defined $TZ) {
3595                $ENV{TZ} = $TZ;
3596        } else {
3597                delete $ENV{TZ};
3598        }
3599        if (defined $::_revision) {
3600                if ($::_revision =~ /^(\d+):(\d+)$/) {
3601                        ($r_min, $r_max) = ($1, $2);
3602                } elsif ($::_revision =~ /^\d+$/) {
3603                        $r_min = $r_max = $::_revision;
3604                } else {
3605                        ::fatal "-r$::_revision is not supported, use ",
3606                                "standard \'git log\' arguments instead\n";
3607                }
3608        }
3609
3610        config_pager();
3611        @args = (git_svn_log_cmd($r_min, $r_max, @args), @args);
3612        my $log = command_output_pipe(@args);
3613        run_pager();
3614        my (@k, $c, $d, $stat);
3615        my $esc_color = qr/(?:\033\[(?:(?:\d+;)*\d*)?m)*/;
3616        while (<$log>) {
3617                if (/^${esc_color}commit ($::sha1_short)/o) {
3618                        my $cmt = $1;
3619                        if ($c && cmt_showable($c) && $c->{r} != $r_last) {
3620                                $r_last = $c->{r};
3621                                process_commit($c, $r_min, $r_max, \@k) or
3622                                                                goto out;
3623                        }
3624                        $d = undef;
3625                        $c = { c => $cmt };
3626                } elsif (/^${esc_color}author (.+) (\d+) ([\-\+]?\d+)$/o) {
3627                        get_author_info($c, $1, $2, $3);
3628                } elsif (/^${esc_color}(?:tree|parent|committer) /o) {
3629                        # ignore
3630                } elsif (/^${esc_color}:\d{6} \d{6} $::sha1_short/o) {
3631                        push @{$c->{raw}}, $_;
3632                } elsif (/^${esc_color}[ACRMDT]\t/) {
3633                        # we could add $SVN->{svn_path} here, but that requires
3634                        # remote access at the moment (repo_path_split)...
3635                        s#^(${esc_color})([ACRMDT])\t#$1   $2 #o;
3636                        push @{$c->{changed}}, $_;
3637                } elsif (/^${esc_color}diff /o) {
3638                        $d = 1;
3639                        push @{$c->{diff}}, $_;
3640                } elsif ($d) {
3641                        push @{$c->{diff}}, $_;
3642                } elsif (/^\ .+\ \|\s*\d+\ $esc_color[\+\-]*
3643                          $esc_color*[\+\-]*$esc_color$/x) {
3644                        $stat = 1;
3645                        push @{$c->{stat}}, $_;
3646                } elsif ($stat && /^ \d+ files changed, \d+ insertions/) {
3647                        push @{$c->{stat}}, $_;
3648                        $stat = undef;
3649                } elsif (/^${esc_color}    (git-svn-id:.+)$/o) {
3650                        ($c->{url}, $c->{r}, undef) = ::extract_metadata($1);
3651                } elsif (s/^${esc_color}    //o) {
3652                        push @{$c->{l}}, $_;
3653                }
3654        }
3655        if ($c && defined $c->{r} && $c->{r} != $r_last) {
3656                $r_last = $c->{r};
3657                process_commit($c, $r_min, $r_max, \@k);
3658        }
3659        if (@k) {
3660                my $swap = $r_max;
3661                $r_max = $r_min;
3662                $r_min = $swap;
3663                process_commit($_, $r_min, $r_max) foreach reverse @k;
3664        }
3665out:
3666        close $log;
3667        print '-' x72,"\n" unless $incremental || $oneline;
3668}
3669
3670package Git::SVN::Migration;
3671# these version numbers do NOT correspond to actual version numbers
3672# of git nor git-svn.  They are just relative.
3673#
3674# v0 layout: .git/$id/info/url, refs/heads/$id-HEAD
3675#
3676# v1 layout: .git/$id/info/url, refs/remotes/$id
3677#
3678# v2 layout: .git/svn/$id/info/url, refs/remotes/$id
3679#
3680# v3 layout: .git/svn/$id, refs/remotes/$id
3681#            - info/url may remain for backwards compatibility
3682#            - this is what we migrate up to this layout automatically,
3683#            - this will be used by git svn init on single branches
3684# v3.1 layout (auto migrated):
3685#            - .rev_db => .rev_db.$UUID, .rev_db will remain as a symlink
3686#              for backwards compatibility
3687#
3688# v4 layout: .git/svn/$repo_id/$id, refs/remotes/$repo_id/$id
3689#            - this is only created for newly multi-init-ed
3690#              repositories.  Similar in spirit to the
3691#              --use-separate-remotes option in git-clone (now default)
3692#            - we do not automatically migrate to this (following
3693#              the example set by core git)
3694use strict;
3695use warnings;
3696use Carp qw/croak/;
3697use File::Path qw/mkpath/;
3698use File::Basename qw/dirname basename/;
3699use vars qw/$_minimize/;
3700
3701sub migrate_from_v0 {
3702        my $git_dir = $ENV{GIT_DIR};
3703        return undef unless -d $git_dir;
3704        my ($fh, $ctx) = command_output_pipe(qw/rev-parse --symbolic --all/);
3705        my $migrated = 0;
3706        while (<$fh>) {
3707                chomp;
3708                my ($id, $orig_ref) = ($_, $_);
3709                next unless $id =~ s#^refs/heads/(.+)-HEAD$#$1#;
3710                next unless -f "$git_dir/$id/info/url";
3711                my $new_ref = "refs/remotes/$id";
3712                if (::verify_ref("$new_ref^0")) {
3713                        print STDERR "W: $orig_ref is probably an old ",
3714                                     "branch used by an ancient version of ",
3715                                     "git-svn.\n",
3716                                     "However, $new_ref also exists.\n",
3717                                     "We will not be able ",
3718                                     "to use this branch until this ",
3719                                     "ambiguity is resolved.\n";
3720                        next;
3721                }
3722                print STDERR "Migrating from v0 layout...\n" if !$migrated;
3723                print STDERR "Renaming ref: $orig_ref => $new_ref\n";
3724                command_noisy('update-ref', $new_ref, $orig_ref);
3725                command_noisy('update-ref', '-d', $orig_ref, $orig_ref);
3726                $migrated++;
3727        }
3728        command_close_pipe($fh, $ctx);
3729        print STDERR "Done migrating from v0 layout...\n" if $migrated;
3730        $migrated;
3731}
3732
3733sub migrate_from_v1 {
3734        my $git_dir = $ENV{GIT_DIR};
3735        my $migrated = 0;
3736        return $migrated unless -d $git_dir;
3737        my $svn_dir = "$git_dir/svn";
3738
3739        # just in case somebody used 'svn' as their $id at some point...
3740        return $migrated if -d $svn_dir && ! -f "$svn_dir/info/url";
3741
3742        print STDERR "Migrating from a git-svn v1 layout...\n";
3743        mkpath([$svn_dir]);
3744        print STDERR "Data from a previous version of git-svn exists, but\n\t",
3745                     "$svn_dir\n\t(required for this version ",
3746                     "($::VERSION) of git-svn) does not. exist\n";
3747        my ($fh, $ctx) = command_output_pipe(qw/rev-parse --symbolic --all/);
3748        while (<$fh>) {
3749                my $x = $_;
3750                next unless $x =~ s#^refs/remotes/##;
3751                chomp $x;
3752                next unless -f "$git_dir/$x/info/url";
3753                my $u = eval { ::file_to_s("$git_dir/$x/info/url") };
3754                next unless $u;
3755                my $dn = dirname("$git_dir/svn/$x");
3756                mkpath([$dn]) unless -d $dn;
3757                if ($x eq 'svn') { # they used 'svn' as GIT_SVN_ID:
3758                        mkpath(["$git_dir/svn/svn"]);
3759                        print STDERR " - $git_dir/$x/info => ",
3760                                        "$git_dir/svn/$x/info\n";
3761                        rename "$git_dir/$x/info", "$git_dir/svn/$x/info" or
3762                               croak "$!: $x";
3763                        # don't worry too much about these, they probably
3764                        # don't exist with repos this old (save for index,
3765                        # and we can easily regenerate that)
3766                        foreach my $f (qw/unhandled.log index .rev_db/) {
3767                                rename "$git_dir/$x/$f", "$git_dir/svn/$x/$f";
3768                        }
3769                } else {
3770                        print STDERR " - $git_dir/$x => $git_dir/svn/$x\n";
3771                        rename "$git_dir/$x", "$git_dir/svn/$x" or
3772                               croak "$!: $x";
3773                }
3774                $migrated++;
3775        }
3776        command_close_pipe($fh, $ctx);
3777        print STDERR "Done migrating from a git-svn v1 layout\n";
3778        $migrated;
3779}
3780
3781sub read_old_urls {
3782        my ($l_map, $pfx, $path) = @_;
3783        my @dir;
3784        foreach (<$path/*>) {
3785                if (-r "$_/info/url") {
3786                        $pfx .= '/' if $pfx && $pfx !~ m!/$!;
3787                        my $ref_id = $pfx . basename $_;
3788                        my $url = ::file_to_s("$_/info/url");
3789                        $l_map->{$ref_id} = $url;
3790                } elsif (-d $_) {
3791                        push @dir, $_;
3792                }
3793        }
3794        foreach (@dir) {
3795                my $x = $_;
3796                $x =~ s!^\Q$ENV{GIT_DIR}\E/svn/!!o;
3797                read_old_urls($l_map, $x, $_);
3798        }
3799}
3800
3801sub migrate_from_v2 {
3802        my @cfg = command(qw/config -l/);
3803        return if grep /^svn-remote\..+\.url=/, @cfg;
3804        my %l_map;
3805        read_old_urls(\%l_map, '', "$ENV{GIT_DIR}/svn");
3806        my $migrated = 0;
3807
3808        foreach my $ref_id (sort keys %l_map) {
3809                eval { Git::SVN->init($l_map{$ref_id}, '', undef, $ref_id) };
3810                if ($@) {
3811                        Git::SVN->init($l_map{$ref_id}, '', $ref_id, $ref_id);
3812                }
3813                $migrated++;
3814        }
3815        $migrated;
3816}
3817
3818sub minimize_connections {
3819        my $r = Git::SVN::read_all_remotes();
3820        my $new_urls = {};
3821        my $root_repos = {};
3822        foreach my $repo_id (keys %$r) {
3823                my $url = $r->{$repo_id}->{url} or next;
3824                my $fetch = $r->{$repo_id}->{fetch} or next;
3825                my $ra = Git::SVN::Ra->new($url);
3826
3827                # skip existing cases where we already connect to the root
3828                if (($ra->{url} eq $ra->{repos_root}) ||
3829                    (Git::SVN::sanitize_remote_name($ra->{repos_root}) eq
3830                     $repo_id)) {
3831                        $root_repos->{$ra->{url}} = $repo_id;
3832                        next;
3833                }
3834
3835                my $root_ra = Git::SVN::Ra->new($ra->{repos_root});
3836                my $root_path = $ra->{url};
3837                $root_path =~ s#^\Q$ra->{repos_root}\E(/|$)##;
3838                foreach my $path (keys %$fetch) {
3839                        my $ref_id = $fetch->{$path};
3840                        my $gs = Git::SVN->new($ref_id, $repo_id, $path);
3841
3842                        # make sure we can read when connecting to
3843                        # a higher level of a repository
3844                        my ($last_rev, undef) = $gs->last_rev_commit;
3845                        if (!defined $last_rev) {
3846                                $last_rev = eval {
3847                                        $root_ra->get_latest_revnum;
3848                                };
3849                                next if $@;
3850                        }
3851                        my $new = $root_path;
3852                        $new .= length $path ? "/$path" : '';
3853                        eval {
3854                                $root_ra->get_log([$new], $last_rev, $last_rev,
3855                                                  0, 0, 1, sub { });
3856                        };
3857                        next if $@;
3858                        $new_urls->{$ra->{repos_root}}->{$new} =
3859                                { ref_id => $ref_id,
3860                                  old_repo_id => $repo_id,
3861                                  old_path => $path };
3862                }
3863        }
3864
3865        my @emptied;
3866        foreach my $url (keys %$new_urls) {
3867                # see if we can re-use an existing [svn-remote "repo_id"]
3868                # instead of creating a(n ugly) new section:
3869                my $repo_id = $root_repos->{$url} ||
3870                              Git::SVN::sanitize_remote_name($url);
3871
3872                my $fetch = $new_urls->{$url};
3873                foreach my $path (keys %$fetch) {
3874                        my $x = $fetch->{$path};
3875                        Git::SVN->init($url, $path, $repo_id, $x->{ref_id});
3876                        my $pfx = "svn-remote.$x->{old_repo_id}";
3877
3878                        my $old_fetch = quotemeta("$x->{old_path}:".
3879                                                  "refs/remotes/$x->{ref_id}");
3880                        command_noisy(qw/config --unset/,
3881                                      "$pfx.fetch", '^'. $old_fetch . '$');
3882                        delete $r->{$x->{old_repo_id}}->
3883                               {fetch}->{$x->{old_path}};
3884                        if (!keys %{$r->{$x->{old_repo_id}}->{fetch}}) {
3885                                command_noisy(qw/config --unset/,
3886                                              "$pfx.url");
3887                                push @emptied, $x->{old_repo_id}
3888                        }
3889                }
3890        }
3891        if (@emptied) {
3892                my $file = $ENV{GIT_CONFIG} || $ENV{GIT_CONFIG_LOCAL} ||
3893                           "$ENV{GIT_DIR}/config";
3894                print STDERR <<EOF;
3895The following [svn-remote] sections in your config file ($file) are empty
3896and can be safely removed:
3897EOF
3898                print STDERR "[svn-remote \"$_\"]\n" foreach @emptied;
3899        }
3900}
3901
3902sub migration_check {
3903        migrate_from_v0();
3904        migrate_from_v1();
3905        migrate_from_v2();
3906        minimize_connections() if $_minimize;
3907}
3908
3909package Git::IndexInfo;
3910use strict;
3911use warnings;
3912use Git qw/command_input_pipe command_close_pipe/;
3913
3914sub new {
3915        my ($class) = @_;
3916        my ($gui, $ctx) = command_input_pipe(qw/update-index -z --index-info/);
3917        bless { gui => $gui, ctx => $ctx, nr => 0}, $class;
3918}
3919
3920sub remove {
3921        my ($self, $path) = @_;
3922        if (print { $self->{gui} } '0 ', 0 x 40, "\t", $path, "\0") {
3923                return ++$self->{nr};
3924        }
3925        undef;
3926}
3927
3928sub update {
3929        my ($self, $mode, $hash, $path) = @_;
3930        if (print { $self->{gui} } $mode, ' ', $hash, "\t", $path, "\0") {
3931                return ++$self->{nr};
3932        }
3933        undef;
3934}
3935
3936sub DESTROY {
3937        my ($self) = @_;
3938        command_close_pipe($self->{gui}, $self->{ctx});
3939}
3940
3941package Git::SVN::GlobSpec;
3942use strict;
3943use warnings;
3944
3945sub new {
3946        my ($class, $glob) = @_;
3947        my $re = $glob;
3948        $re =~ s!/+$!!g; # no need for trailing slashes
3949        my $nr = ($re =~ s!^(.*)\*(.*)$!\(\[^/\]+\)!g);
3950        my ($left, $right) = ($1, $2);
3951        if ($nr > 1) {
3952                die "Only one '*' wildcard expansion ",
3953                    "is supported (got $nr): '$glob'\n";
3954        } elsif ($nr == 0) {
3955                die "One '*' is needed for glob: '$glob'\n";
3956        }
3957        $re = quotemeta($left) . $re . quotemeta($right);
3958        if (length $left && !($left =~ s!/+$!!g)) {
3959                die "Missing trailing '/' on left side of: '$glob' ($left)\n";
3960        }
3961        if (length $right && !($right =~ s!^/+!!g)) {
3962                die "Missing leading '/' on right side of: '$glob' ($right)\n";
3963        }
3964        my $left_re = qr/^\/\Q$left\E(\/|$)/;
3965        bless { left => $left, right => $right, left_regex => $left_re,
3966                regex => qr/$re/, glob => $glob }, $class;
3967}
3968
3969sub full_path {
3970        my ($self, $path) = @_;
3971        return (length $self->{left} ? "$self->{left}/" : '') .
3972               $path . (length $self->{right} ? "/$self->{right}" : '');
3973}
3974
3975__END__
3976
3977Data structures:
3978
3979
3980$remotes = { # returned by read_all_remotes()
3981        'svn' => {
3982                # svn-remote.svn.url=https://svn.musicpd.org
3983                url => 'https://svn.musicpd.org',
3984                # svn-remote.svn.fetch=mpd/trunk:trunk
3985                fetch => {
3986                        'mpd/trunk' => 'trunk',
3987                },
3988                # svn-remote.svn.tags=mpd/tags/*:tags/*
3989                tags => {
3990                        path => {
3991                                left => 'mpd/tags',
3992                                right => '',
3993                                regex => qr!mpd/tags/([^/]+)$!,
3994                                glob => 'tags/*',
3995                        },
3996                        ref => {
3997                                left => 'tags',
3998                                right => '',
3999                                regex => qr!tags/([^/]+)$!,
4000                                glob => 'tags/*',
4001                        },
4002                }
4003        }
4004};
4005
4006$log_entry hashref as returned by libsvn_log_entry()
4007{
4008        log => 'whitespace-formatted log entry
4009',                                              # trailing newline is preserved
4010        revision => '8',                        # integer
4011        date => '2004-02-24T17:01:44.108345Z',  # commit date
4012        author => 'committer name'
4013};
4014
4015
4016# this is generated by generate_diff();
4017@mods = array of diff-index line hashes, each element represents one line
4018        of diff-index output
4019
4020diff-index line ($m hash)
4021{
4022        mode_a => first column of diff-index output, no leading ':',
4023        mode_b => second column of diff-index output,
4024        sha1_b => sha1sum of the final blob,
4025        chg => change type [MCRADT],
4026        file_a => original file name of a file (iff chg is 'C' or 'R')
4027        file_b => new/current file name of a file (any chg)
4028}
4029;
4030
4031# retval of read_url_paths{,_all}();
4032$l_map = {
4033        # repository root url
4034        'https://svn.musicpd.org' => {
4035                # repository path               # GIT_SVN_ID
4036                'mpd/trunk'             =>      'trunk',
4037                'mpd/tags/0.11.5'       =>      'tags/0.11.5',
4038        },
4039}
4040
4041Notes:
4042        I don't trust the each() function on unless I created %hash myself
4043        because the internal iterator may not have started at base.