perl/Git/SVN/Fetcher.pm

   1 package Git::SVN::Fetcher;
   2 use vars qw/@ISA $_ignore_regex $_include_regex $_preserve_empty_dirs
   3             $_placeholder_filename @deleted_gpath %added_placeholder
   4             $repo_id/;
   5 use strict;
   6 use warnings;
   7 use SVN::Delta;
   8 use Carp qw/croak/;
   9 use File::Basename qw/dirname/;
  10 use IO::File qw//;
  11 use Git qw/command command_oneline command_noisy command_output_pipe
  12            command_input_pipe command_close_pipe
  13            command_bidi_pipe command_close_bidi_pipe/;
  14 BEGIN {
  15         @ISA = qw(SVN::Delta::Editor);
  16 }
  17
  18 # file baton members: path, mode_a, mode_b, pool, fh, blob, base
  19 sub new {
  20         my ($class, $git_svn, $switch_path) = @_;
  21         my $self = SVN::Delta::Editor->new;
  22         bless $self, $class;
  23         if (exists $git_svn->{last_commit}) {
  24                 $self->{c} = $git_svn->{last_commit};
  25                 $self->{empty_symlinks} =
  26                                   _mark_empty_symlinks($git_svn, $switch_path);
  27         }
  28
  29         # some options are read globally, but can be overridden locally
  30         # per [svn-remote "..."] section.  Command-line options will *NOT*
  31         # override options set in an [svn-remote "..."] section
  32         $repo_id = $git_svn->{repo_id};
  33         my $k = "svn-remote.$repo_id.ignore-paths";
  34         my $v = eval { command_oneline('config', '--get', $k) };
  35         $self->{ignore_regex} = $v;
  36
  37         $k = "svn-remote.$repo_id.include-paths";
  38         $v = eval { command_oneline('config', '--get', $k) };
  39         $self->{include_regex} = $v;
  40
  41         $k = "svn-remote.$repo_id.preserve-empty-dirs";
  42         $v = eval { command_oneline('config', '--get', '--bool', $k) };
  43         if ($v && $v eq 'true') {
  44                 $_preserve_empty_dirs = 1;
  45                 $k = "svn-remote.$repo_id.placeholder-filename";
  46                 $v = eval { command_oneline('config', '--get', $k) };
  47                 $_placeholder_filename = $v;
  48         }
  49
  50         # Load the list of placeholder files added during previous invocations.
  51         $k = "svn-remote.$repo_id.added-placeholder";
  52         $v = eval { command_oneline('config', '--get-all', $k) };
  53         if ($_preserve_empty_dirs && $v) {
  54                 # command() prints errors to stderr, so we only call it if
  55                 # command_oneline() succeeded.
  56                 my @v = command('config', '--get-all', $k);
  57                 $added_placeholder{ dirname($_) } = $_ foreach @v;
  58         }
  59
  60         $self->{empty} = {};
  61         $self->{dir_prop} = {};
  62         $self->{file_prop} = {};
  63         $self->{absent_dir} = {};
  64         $self->{absent_file} = {};
  65         require Git::IndexInfo;
  66         $self->{gii} = $git_svn->tmp_index_do(sub { Git::IndexInfo->new });
  67         $self->{pathnameencoding} = Git::config('svn.pathnameencoding');
  68         $self;
  69 }
  70
  71 # this uses the Ra object, so it must be called before do_{switch,update},
  72 # not inside them (when the Git::SVN::Fetcher object is passed) to
  73 # do_{switch,update}
  74 sub _mark_empty_symlinks {
  75         my ($git_svn, $switch_path) = @_;
  76         my $bool = Git::config_bool('svn.brokenSymlinkWorkaround');
  77         return {} if (!defined($bool)) || (defined($bool) && ! $bool);
  78
  79         my %ret;
  80         my ($rev, $cmt) = $git_svn->last_rev_commit;
  81         return {} unless ($rev && $cmt);
  82
  83         # allow the warning to be printed for each revision we fetch to
  84         # ensure the user sees it.  The user can also disable the workaround
  85         # on the repository even while git svn is running and the next
  86         # revision fetched will skip this expensive function.
  87         my $printed_warning;
  88         chomp(my $empty_blob = `git hash-object -t blob --stdin < /dev/null`);
  89         my ($ls, $ctx) = command_output_pipe(qw/ls-tree -r -z/, $cmt);
  90         local $/ = "\0";
  91         my $pfx = defined($switch_path) ? $switch_path : $git_svn->path;
  92         $pfx .= '/' if length($pfx);
  93         while (<$ls>) {
  94                 chomp;
  95                 s/\A100644 blob $empty_blob\t//o or next;
  96                 unless ($printed_warning) {
  97                         print STDERR "Scanning for empty symlinks, ",
  98                                      "this may take a while if you have ",
  99                                      "many empty files\n",
 100                                      "You may disable this with `",
 101                                      "git config svn.brokenSymlinkWorkaround ",
 102                                      "false'.\n",
 103                                      "This may be done in a different ",
 104                                      "terminal without restarting ",
 105                                      "git svn\n";
 106                         $printed_warning = 1;
 107                 }
 108                 my $path = $_;
 109                 my (undef, $props) =
 110                                $git_svn->ra->get_file($pfx.$path, $rev, undef);
 111                 if ($props->{'svn:special'}) {
 112                         $ret{$path} = 1;
 113                 }
 114         }
 115         command_close_pipe($ls, $ctx);
 116         \%ret;
 117 }
 118
 119 # returns true if a given path is inside a ".git" directory
 120 sub in_dot_git {
 121         $_[0] =~ m{(?:^|/)\.git(?:/|$)};
 122 }
 123
 124 # return value: 0 -- don't ignore, 1 -- ignore
 125 # This will also check whether the path is explicitly included
 126 sub is_path_ignored {
 127         my ($self, $path) = @_;
 128         return 1 if in_dot_git($path);
 129         return 1 if defined($self->{ignore_regex}) &&
 130                     $path =~ m!$self->{ignore_regex}!;
 131         return 0 if defined($self->{include_regex}) &&
 132                     $path =~ m!$self->{include_regex}!;
 133         return 0 if defined($_include_regex) &&
 134                     $path =~ m!$_include_regex!;
 135         return 1 if defined($self->{include_regex});
 136         return 1 if defined($_include_regex);
 137         return 0 unless defined($_ignore_regex);
 138         return 1 if $path =~ m!$_ignore_regex!o;
 139         return 0;
 140 }
 141
 142 sub set_path_strip {
 143         my ($self, $path) = @_;
 144         $self->{path_strip} = qr/^\Q$path\E(\/|$)/ if length $path;
 145 }
 146
 147 sub open_root {
 148         { path => '' };
 149 }
 150
 151 sub open_directory {
 152         my ($self, $path, $pb, $rev) = @_;
 153         { path => $path };
 154 }
 155
 156 sub git_path {
 157         my ($self, $path) = @_;
 158         if (my $enc = $self->{pathnameencoding}) {
 159                 require Encode;
 160                 Encode::from_to($path, 'UTF-8', $enc);
 161         }
 162         if ($self->{path_strip}) {
 163                 $path =~ s!$self->{path_strip}!! or
 164                   die "Failed to strip path '$path' ($self->{path_strip})\n";
 165         }
 166         $path;
 167 }
 168
 169 sub delete_entry {
 170         my ($self, $path, $rev, $pb) = @_;
 171         return undef if $self->is_path_ignored($path);
 172
 173         my $gpath = $self->git_path($path);
 174         return undef if ($gpath eq '');
 175
 176         # remove entire directories.
 177         my ($tree) = (command('ls-tree', '-z', $self->{c}, "./$gpath")
 178                          =~ /\A040000 tree ([a-f\d]{40})\t\Q$gpath\E\0/);
 179         if ($tree) {
 180                 my ($ls, $ctx) = command_output_pipe(qw/ls-tree
 181                                                      -r --name-only -z/,
 182                                                      $tree);
 183                 local $/ = "\0";
 184                 while (<$ls>) {
 185                         chomp;
 186                         my $rmpath = "$gpath/$_";
 187                         $self->{gii}->remove($rmpath);
 188                         print "\tD\t$rmpath\n" unless $::_q;
 189                 }
 190                 print "\tD\t$gpath/\n" unless $::_q;
 191                 command_close_pipe($ls, $ctx);
 192         } else {
 193                 $self->{gii}->remove($gpath);
 194                 print "\tD\t$gpath\n" unless $::_q;
 195         }
 196         # Don't add to @deleted_gpath if we're deleting a placeholder file.
 197         push @deleted_gpath, $gpath unless $added_placeholder{dirname($path)};
 198         $self->{empty}->{$path} = 0;
 199         undef;
 200 }
 201
 202 sub open_file {
 203         my ($self, $path, $pb, $rev) = @_;
 204         my ($mode, $blob);
 205
 206         goto out if $self->is_path_ignored($path);
 207
 208         my $gpath = $self->git_path($path);
 209         ($mode, $blob) = (command('ls-tree', '-z', $self->{c}, "./$gpath")
 210                              =~ /\A(\d{6}) blob ([a-f\d]{40})\t\Q$gpath\E\0/);
 211         unless (defined $mode && defined $blob) {
 212                 die "$path was not found in commit $self->{c} (r$rev)\n";
 213         }
 214         if ($mode eq '100644' && $self->{empty_symlinks}->{$path}) {
 215                 $mode = '120000';
 216         }
 217 out:
 218         { path => $path, mode_a => $mode, mode_b => $mode, blob => $blob,
 219           pool => SVN::Pool->new, action => 'M' };
 220 }
 221
 222 sub add_file {
 223         my ($self, $path, $pb, $cp_path, $cp_rev) = @_;
 224         my $mode;
 225
 226         if (!$self->is_path_ignored($path)) {
 227                 my ($dir, $file) = ($path =~ m#^(.*?)/?([^/]+)$#);
 228                 delete $self->{empty}->{$dir};
 229                 $mode = '100644';
 230
 231                 if ($added_placeholder{$dir}) {
 232                         # Remove our placeholder file, if we created one.
 233                         delete_entry($self, $added_placeholder{$dir})
 234                                 unless $path eq $added_placeholder{$dir};
 235                         delete $added_placeholder{$dir}
 236                 }
 237         }
 238
 239         { path => $path, mode_a => $mode, mode_b => $mode,
 240           pool => SVN::Pool->new, action => 'A' };
 241 }
 242
 243 sub add_directory {
 244         my ($self, $path, $cp_path, $cp_rev) = @_;
 245         goto out if $self->is_path_ignored($path);
 246         my $gpath = $self->git_path($path);
 247         if ($gpath eq '') {
 248                 my ($ls, $ctx) = command_output_pipe(qw/ls-tree
 249                                                      -r --name-only -z/,
 250                                                      $self->{c});
 251                 local $/ = "\0";
 252                 while (<$ls>) {
 253                         chomp;
 254                         $self->{gii}->remove($_);
 255                         print "\tD\t$_\n" unless $::_q;
 256                         push @deleted_gpath, $gpath;
 257                 }
 258                 command_close_pipe($ls, $ctx);
 259                 $self->{empty}->{$path} = 0;
 260         }
 261         my ($dir, $file) = ($path =~ m#^(.*?)/?([^/]+)$#);
 262         delete $self->{empty}->{$dir};
 263         $self->{empty}->{$path} = 1;
 264
 265         if ($added_placeholder{$dir}) {
 266                 # Remove our placeholder file, if we created one.
 267                 delete_entry($self, $added_placeholder{$dir});
 268                 delete $added_placeholder{$dir}
 269         }
 270
 271 out:
 272         { path => $path };
 273 }
 274
 275 sub change_dir_prop {
 276         my ($self, $db, $prop, $value) = @_;
 277         return undef if $self->is_path_ignored($db->{path});
 278         $self->{dir_prop}->{$db->{path}} ||= {};
 279         $self->{dir_prop}->{$db->{path}}->{$prop} = $value;
 280         undef;
 281 }
 282
 283 sub absent_directory {
 284         my ($self, $path, $pb) = @_;
 285         return undef if $self->is_path_ignored($path);
 286         $self->{absent_dir}->{$pb->{path}} ||= [];
 287         push @{$self->{absent_dir}->{$pb->{path}}}, $path;
 288         undef;
 289 }
 290
 291 sub absent_file {
 292         my ($self, $path, $pb) = @_;
 293         return undef if $self->is_path_ignored($path);
 294         $self->{absent_file}->{$pb->{path}} ||= [];
 295         push @{$self->{absent_file}->{$pb->{path}}}, $path;
 296         undef;
 297 }
 298
 299 sub change_file_prop {
 300         my ($self, $fb, $prop, $value) = @_;
 301         return undef if $self->is_path_ignored($fb->{path});
 302         if ($prop eq 'svn:executable') {
 303                 if ($fb->{mode_b} != 120000) {
 304                         $fb->{mode_b} = defined $value ? 100755 : 100644;
 305                 }
 306         } elsif ($prop eq 'svn:special') {
 307                 $fb->{mode_b} = defined $value ? 120000 : 100644;
 308         } else {
 309                 $self->{file_prop}->{$fb->{path}} ||= {};
 310                 $self->{file_prop}->{$fb->{path}}->{$prop} = $value;
 311         }
 312         undef;
 313 }
 314
 315 sub apply_textdelta {
 316         my ($self, $fb, $exp) = @_;
 317         return undef if $self->is_path_ignored($fb->{path});
 318         my $suffix = 0;
 319         ++$suffix while $::_repository->temp_is_locked("svn_delta_${$}_$suffix");
 320         my $fh = $::_repository->temp_acquire("svn_delta_${$}_$suffix");
 321         # $fh gets auto-closed() by SVN::TxDelta::apply(),
 322         # (but $base does not,) so dup() it for reading in close_file
 323         open my $dup, '<&', $fh or croak $!;
 324         my $base = $::_repository->temp_acquire("git_blob_${$}_$suffix");
 325
 326         if ($fb->{blob}) {
 327                 my ($base_is_link, $size);
 328
 329                 if ($fb->{mode_a} eq '120000' &&
 330                     ! $self->{empty_symlinks}->{$fb->{path}}) {
 331                         print $base 'link ' or die "print $!\n";
 332                         $base_is_link = 1;
 333                 }
 334         retry:
 335                 $size = $::_repository->cat_blob($fb->{blob}, $base);
 336                 die "Failed to read object $fb->{blob}" if ($size < 0);
 337
 338                 if (defined $exp) {
 339                         seek $base, 0, 0 or croak $!;
 340                         my $got = ::md5sum($base);
 341                         if ($got ne $exp) {
 342                                 my $err = "Checksum mismatch: ".
 343                                        "$fb->{path} $fb->{blob}\n" .
 344                                        "expected: $exp\n" .
 345                                        "     got: $got\n";
 346                                 if ($base_is_link) {
 347                                         warn $err,
 348                                              "Retrying... (possibly ",
 349                                              "a bad symlink from SVN)\n";
 350                                         $::_repository->temp_reset($base);
 351                                         $base_is_link = 0;
 352                                         goto retry;
 353                                 }
 354                                 die $err;
 355                         }
 356                 }
 357         }
 358         seek $base, 0, 0 or croak $!;
 359         $fb->{fh} = $fh;
 360         $fb->{base} = $base;
 361         [ SVN::TxDelta::apply($base, $dup, undef, $fb->{path}, $fb->{pool}) ];
 362 }
 363
 364 sub close_file {
 365         my ($self, $fb, $exp) = @_;
 366         return undef if $self->is_path_ignored($fb->{path});
 367
 368         my $hash;
 369         my $path = $self->git_path($fb->{path});
 370         if (my $fh = $fb->{fh}) {
 371                 if (defined $exp) {
 372                         seek($fh, 0, 0) or croak $!;
 373                         my $got = ::md5sum($fh);
 374                         if ($got ne $exp) {
 375                                 die "Checksum mismatch: $path\n",
 376                                     "expected: $exp\n    got: $got\n";
 377                         }
 378                 }
 379                 if ($fb->{mode_b} == 120000) {
 380                         sysseek($fh, 0, 0) or croak $!;
 381                         my $rd = sysread($fh, my $buf, 5);
 382
 383                         if (!defined $rd) {
 384                                 croak "sysread: $!\n";
 385                         } elsif ($rd == 0) {
 386                                 warn "$path has mode 120000",
 387                                      " but it points to nothing\n",
 388                                      "converting to an empty file with mode",
 389                                      " 100644\n";
 390                                 $fb->{mode_b} = '100644';
 391                         } elsif ($buf ne 'link ') {
 392                                 warn "$path has mode 120000",
 393                                      " but is not a link\n";
 394                         } else {
 395                                 my $tmp_fh = $::_repository->temp_acquire(
 396                                         'svn_hash');
 397                                 my $res;
 398                                 while ($res = sysread($fh, my $str, 1024)) {
 399                                         my $out = syswrite($tmp_fh, $str, $res);
 400                                         defined($out) && $out == $res
 401                                                 or croak("write ",
 402                                                         Git::temp_path($tmp_fh),
 403                                                         ": $!\n");
 404                                 }
 405                                 defined $res or croak $!;
 406
 407                                 ($fh, $tmp_fh) = ($tmp_fh, $fh);
 408                                 Git::temp_release($tmp_fh, 1);
 409                         }
 410                 }
 411
 412                 $hash = $::_repository->hash_and_insert_object(
 413                                 Git::temp_path($fh));
 414                 $hash =~ /^[a-f\d]{40}$/ or die "not a sha1: $hash\n";
 415
 416                 Git::temp_release($fb->{base}, 1);
 417                 Git::temp_release($fh, 1);
 418         } else {
 419                 $hash = $fb->{blob} or die "no blob information\n";
 420         }
 421         $fb->{pool}->clear;
 422         $self->{gii}->update($fb->{mode_b}, $hash, $path) or croak $!;
 423         print "\t$fb->{action}\t$path\n" if $fb->{action} && ! $::_q;
 424         undef;
 425 }
 426
 427 sub abort_edit {
 428         my $self = shift;
 429         $self->{nr} = $self->{gii}->{nr};
 430         delete $self->{gii};
 431         $self->SUPER::abort_edit(@_);
 432 }
 433
 434 sub close_edit {
 435         my $self = shift;
 436
 437         if ($_preserve_empty_dirs) {
 438                 my @empty_dirs;
 439
 440                 # Any entry flagged as empty that also has an associated
 441                 # dir_prop represents a newly created empty directory.
 442                 foreach my $i (keys %{$self->{empty}}) {
 443                         push @empty_dirs, $i if exists $self->{dir_prop}->{$i};
 444                 }
 445
 446                 # Search for directories that have become empty due subsequent
 447                 # file deletes.
 448                 push @empty_dirs, $self->find_empty_directories();
 449
 450                 # Finally, add a placeholder file to each empty directory.
 451                 $self->add_placeholder_file($_) foreach (@empty_dirs);
 452
 453                 $self->stash_placeholder_list();
 454         }
 455
 456         $self->{git_commit_ok} = 1;
 457         $self->{nr} = $self->{gii}->{nr};
 458         delete $self->{gii};
 459         $self->SUPER::close_edit(@_);
 460 }
 461
 462 sub find_empty_directories {
 463         my ($self) = @_;
 464         my @empty_dirs;
 465         my %dirs = map { dirname($_) => 1 } @deleted_gpath;
 466
 467         foreach my $dir (sort keys %dirs) {
 468                 next if $dir eq ".";
 469
 470                 # If there have been any additions to this directory, there is
 471                 # no reason to check if it is empty.
 472                 my $skip_added = 0;
 473                 foreach my $t (qw/dir_prop file_prop/) {
 474                         foreach my $path (keys %{ $self->{$t} }) {
 475                                 if (exists $self->{$t}->{dirname($path)}) {
 476                                         $skip_added = 1;
 477                                         last;
 478                                 }
 479                         }
 480                         last if $skip_added;
 481                 }
 482                 next if $skip_added;
 483
 484                 # Use `git ls-tree` to get the filenames of this directory
 485                 # that existed prior to this particular commit.
 486                 my $ls = command('ls-tree', '-z', '--name-only',
 487                                  $self->{c}, "$dir/");
 488                 my %files = map { $_ => 1 } split(/\0/, $ls);
 489
 490                 # Remove the filenames that were deleted during this commit.
 491                 delete $files{$_} foreach (@deleted_gpath);
 492
 493                 # Report the directory if there are no filenames left.
 494                 push @empty_dirs, $dir unless (scalar %files);
 495         }
 496         @empty_dirs;
 497 }
 498
 499 sub add_placeholder_file {
 500         my ($self, $dir) = @_;
 501         my $path = "$dir/$_placeholder_filename";
 502         my $gpath = $self->git_path($path);
 503
 504         my $fh = $::_repository->temp_acquire($gpath);
 505         my $hash = $::_repository->hash_and_insert_object(Git::temp_path($fh));
 506         Git::temp_release($fh, 1);
 507         $self->{gii}->update('100644', $hash, $gpath) or croak $!;
 508
 509         # The directory should no longer be considered empty.
 510         delete $self->{empty}->{$dir} if exists $self->{empty}->{$dir};
 511
 512         # Keep track of any placeholder files we create.
 513         $added_placeholder{$dir} = $path;
 514 }
 515
 516 sub stash_placeholder_list {
 517         my ($self) = @_;
 518         my $k = "svn-remote.$repo_id.added-placeholder";
 519         my $v = eval { command_oneline('config', '--get-all', $k) };
 520         command_noisy('config', '--unset-all', $k) if $v;
 521         foreach (values %added_placeholder) {
 522                 command_noisy('config', '--add', $k, $_);
 523         }
 524 }
 525
 526 1;
 527 __END__
 528
 529 =head1 NAME
 530
 531 Git::SVN::Fetcher - tree delta consumer for "git svn fetch"
 532
 533 =head1 SYNOPSIS
 534
 535     use SVN::Core;
 536     use SVN::Ra;
 537     use Git::SVN;
 538     use Git::SVN::Fetcher;
 539     use Git;
 540
 541     my $gs = Git::SVN->find_by_url($url);
 542     my $ra = SVN::Ra->new(url => $url);
 543     my $editor = Git::SVN::Fetcher->new($gs);
 544     my $reporter = $ra->do_update($SVN::Core::INVALID_REVNUM, '',
 545                                   1, $editor);
 546     $reporter->set_path('', $old_rev, 0);
 547     $reporter->finish_report;
 548     my $tree = $gs->tmp_index_do(sub { command_oneline('write-tree') });
 549
 550     foreach my $path (keys %{$editor->{dir_prop}) {
 551         my $props = $editor->{dir_prop}{$path};
 552         foreach my $prop (keys %$props) {
 553             print "property $prop at $path changed to $props->{$prop}\n";
 554         }
 555     }
 556     foreach my $path (keys %{$editor->{empty}) {
 557         my $action = $editor->{empty}{$path} ? 'added' : 'removed';
 558         print "empty directory $path $action\n";
 559     }
 560     foreach my $path (keys %{$editor->{file_prop}) { ... }
 561     foreach my $parent (keys %{$editor->{absent_dir}}) {
 562         my @children = @{$editor->{abstent_dir}{$parent}};
 563         print "cannot fetch directory $parent/$_: not authorized?\n"
 564             foreach @children;
 565     }
 566     foreach my $parent (keys %{$editor->{absent_file}) { ... }
 567
 568 =head1 DESCRIPTION
 569
 570 This is a subclass of C<SVN::Delta::Editor>, which means it implements
 571 callbacks to act as a consumer of Subversion tree deltas.  This
 572 particular implementation of those callbacks is meant to store
 573 information about the resulting content which B<git svn fetch> could
 574 use to populate new commits and new entries for F<unhandled.log>.
 575 More specifically:
 576
 577 =over
 578
 579 =item * Additions, removals, and modifications of files are propagated
 580 to git-svn's index file F<$GIT_DIR/svn/$refname/index> using
 581 B<git update-index>.
 582
 583 =item * Changes in Subversion path properties are recorded in the
 584 C<dir_prop> and C<file_prop> fields (which are hashes).
 585
 586 =item * Addition and removal of empty directories are indicated by
 587 entries with value 1 and 0 respectively in the C<empty> hash.
 588
 589 =item * Paths that are present but cannot be conveyed (presumably due
 590 to permissions) are recorded in the C<absent_file> and
 591 C<absent_dirs> hashes.  For each key, the corresponding value is
 592 a list of paths under that directory that were present but
 593 could not be conveyed.
 594
 595 =back
 596
 597 The interface is unstable.  Do not use this module unless you are
 598 developing git-svn.
 599
 600 =head1 DEPENDENCIES
 601
 602 L<SVN::Delta> from the Subversion perl bindings,
 603 the core L<Carp>, L<File::Basename>, and L<IO::File> modules,
 604 and git's L<Git> helper module.
 605
 606 C<Git::SVN::Fetcher> has not been tested using callers other than
 607 B<git-svn> itself.
 608
 609 =head1 SEE ALSO
 610
 611 L<SVN::Delta>,
 612 L<Git::SVN::Editor>.
 613
 614 =head1 INCOMPATIBILITIES
 615
 616 None reported.
 617
 618 =head1 BUGS
 619
 620 None.