perl/Git/SVN/Ra.pm

   1 package Git::SVN::Ra;
   2 use vars qw/@ISA $config_dir $_ignore_refs_regex $_log_window_size/;
   3 use strict;
   4 use warnings;
   5 use SVN::Client;
   6 use SVN::Ra;
   7 BEGIN {
   8         @ISA = qw(SVN::Ra);
   9 }
  10
  11 my ($ra_invalid, $can_do_switch, %ignored_err, $RA);
  12
  13 BEGIN {
  14         # enforce temporary pool usage for some simple functions
  15         no strict 'refs';
  16         for my $f (qw/rev_proplist get_latest_revnum get_uuid get_repos_root
  17                       get_file/) {
  18                 my $SUPER = "SUPER::$f";
  19                 *$f = sub {
  20                         my $self = shift;
  21                         my $pool = SVN::Pool->new;
  22                         my @ret = $self->$SUPER(@_,$pool);
  23                         $pool->clear;
  24                         wantarray ? @ret : $ret[0];
  25                 };
  26         }
  27 }
  28
  29 sub _auth_providers () {
  30         my @rv = (
  31           SVN::Client::get_simple_provider(),
  32           SVN::Client::get_ssl_server_trust_file_provider(),
  33           SVN::Client::get_simple_prompt_provider(
  34             \&Git::SVN::Prompt::simple, 2),
  35           SVN::Client::get_ssl_client_cert_file_provider(),
  36           SVN::Client::get_ssl_client_cert_prompt_provider(
  37             \&Git::SVN::Prompt::ssl_client_cert, 2),
  38           SVN::Client::get_ssl_client_cert_pw_file_provider(),
  39           SVN::Client::get_ssl_client_cert_pw_prompt_provider(
  40             \&Git::SVN::Prompt::ssl_client_cert_pw, 2),
  41           SVN::Client::get_username_provider(),
  42           SVN::Client::get_ssl_server_trust_prompt_provider(
  43             \&Git::SVN::Prompt::ssl_server_trust),
  44           SVN::Client::get_username_prompt_provider(
  45             \&Git::SVN::Prompt::username, 2)
  46         );
  47
  48         # earlier 1.6.x versions would segfault, and <= 1.5.x didn't have
  49         # this function
  50         if (::compare_svn_version('1.6.15') >= 0) {
  51                 my $config = SVN::Core::config_get_config($config_dir);
  52                 my ($p, @a);
  53                 # config_get_config returns all config files from
  54                 # ~/.subversion, auth_get_platform_specific_client_providers
  55                 # just wants the config "file".
  56                 @a = ($config->{'config'}, undef);
  57                 $p = SVN::Core::auth_get_platform_specific_client_providers(@a);
  58                 # Insert the return value from
  59                 # auth_get_platform_specific_providers
  60                 unshift @rv, @$p;
  61         }
  62         \@rv;
  63 }
  64
  65 sub escape_uri_only {
  66         my ($uri) = @_;
  67         my @tmp;
  68         foreach (split m{/}, $uri) {
  69                 s/([^~\w.%+-]|%(?![a-fA-F0-9]{2}))/sprintf("%%%02X",ord($1))/eg;
  70                 push @tmp, $_;
  71         }
  72         join('/', @tmp);
  73 }
  74
  75 sub escape_url {
  76         my ($url) = @_;
  77         if ($url =~ m#^(https?)://([^/]+)(.*)$#) {
  78                 my ($scheme, $domain, $uri) = ($1, $2, escape_uri_only($3));
  79                 $url = "$scheme://$domain$uri";
  80         }
  81         $url;
  82 }
  83
  84 sub new {
  85         my ($class, $url) = @_;
  86         $url =~ s!/+$!!;
  87         return $RA if ($RA && $RA->url eq $url);
  88
  89         ::_req_svn();
  90
  91         SVN::_Core::svn_config_ensure($config_dir, undef);
  92         my ($baton, $callbacks) = SVN::Core::auth_open_helper(_auth_providers);
  93         my $config = SVN::Core::config_get_config($config_dir);
  94         $RA = undef;
  95         my $dont_store_passwords = 1;
  96         my $conf_t = ${$config}{'config'};
  97         {
  98                 no warnings 'once';
  99                 # The usage of $SVN::_Core::SVN_CONFIG_* variables
 100                 # produces warnings that variables are used only once.
 101                 # I had not found the better way to shut them up, so
 102                 # the warnings of type 'once' are disabled in this block.
 103                 if (SVN::_Core::svn_config_get_bool($conf_t,
 104                     $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
 105                     $SVN::_Core::SVN_CONFIG_OPTION_STORE_PASSWORDS,
 106                     1) == 0) {
 107                         SVN::_Core::svn_auth_set_parameter($baton,
 108                             $SVN::_Core::SVN_AUTH_PARAM_DONT_STORE_PASSWORDS,
 109                             bless (\$dont_store_passwords, "_p_void"));
 110                 }
 111                 if (SVN::_Core::svn_config_get_bool($conf_t,
 112                     $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
 113                     $SVN::_Core::SVN_CONFIG_OPTION_STORE_AUTH_CREDS,
 114                     1) == 0) {
 115                         $Git::SVN::Prompt::_no_auth_cache = 1;
 116                 }
 117         } # no warnings 'once'
 118         my $self = SVN::Ra->new(url => escape_url($url), auth => $baton,
 119                               config => $config,
 120                               pool => SVN::Pool->new,
 121                               auth_provider_callbacks => $callbacks);
 122         $RA = bless $self, $class;
 123
 124         # Make sure its canonicalized
 125         $self->url($url);
 126         $self->{svn_path} = $url;
 127         $self->{repos_root} = $self->get_repos_root;
 128         $self->{svn_path} =~ s#^\Q$self->{repos_root}\E(/|$)##;
 129         $self->{cache} = { check_path => { r => 0, data => {} },
 130                            get_dir => { r => 0, data => {} } };
 131
 132         return $RA;
 133 }
 134
 135 sub url {
 136         my $self = shift;
 137
 138         if (@_) {
 139                 my $url = shift;
 140                 $self->{url} = $url;
 141                 return;
 142         }
 143
 144         return $self->{url};
 145 }
 146
 147 sub check_path {
 148         my ($self, $path, $r) = @_;
 149         my $cache = $self->{cache}->{check_path};
 150         if ($r == $cache->{r} && exists $cache->{data}->{$path}) {
 151                 return $cache->{data}->{$path};
 152         }
 153         my $pool = SVN::Pool->new;
 154         my $t = $self->SUPER::check_path($path, $r, $pool);
 155         $pool->clear;
 156         if ($r != $cache->{r}) {
 157                 %{$cache->{data}} = ();
 158                 $cache->{r} = $r;
 159         }
 160         $cache->{data}->{$path} = $t;
 161 }
 162
 163 sub get_dir {
 164         my ($self, $dir, $r) = @_;
 165         my $cache = $self->{cache}->{get_dir};
 166         if ($r == $cache->{r}) {
 167                 if (my $x = $cache->{data}->{$dir}) {
 168                         return wantarray ? @$x : $x->[0];
 169                 }
 170         }
 171         my $pool = SVN::Pool->new;
 172         my ($d, undef, $props) = $self->SUPER::get_dir($dir, $r, $pool);
 173         my %dirents = map { $_ => { kind => $d->{$_}->kind } } keys %$d;
 174         $pool->clear;
 175         if ($r != $cache->{r}) {
 176                 %{$cache->{data}} = ();
 177                 $cache->{r} = $r;
 178         }
 179         $cache->{data}->{$dir} = [ \%dirents, $r, $props ];
 180         wantarray ? (\%dirents, $r, $props) : \%dirents;
 181 }
 182
 183 sub DESTROY {
 184         # do not call the real DESTROY since we store ourselves in $RA
 185 }
 186
 187 # get_log(paths, start, end, limit,
 188 #         discover_changed_paths, strict_node_history, receiver)
 189 sub get_log {
 190         my ($self, @args) = @_;
 191         my $pool = SVN::Pool->new;
 192
 193         # svn_log_changed_path_t objects passed to get_log are likely to be
 194         # overwritten even if only the refs are copied to an external variable,
 195         # so we should dup the structures in their entirety.  Using an
 196         # externally passed pool (instead of our temporary and quickly cleared
 197         # pool in Git::SVN::Ra) does not help matters at all...
 198         my $receiver = pop @args;
 199         my $prefix = "/".$self->{svn_path};
 200         $prefix =~ s#/+($)##;
 201         my $prefix_regex = qr#^\Q$prefix\E#;
 202         push(@args, sub {
 203                 my ($paths) = $_[0];
 204                 return &$receiver(@_) unless $paths;
 205                 $_[0] = ();
 206                 foreach my $p (keys %$paths) {
 207                         my $i = $paths->{$p};
 208                         # Make path relative to our url, not repos_root
 209                         $p =~ s/$prefix_regex//;
 210                         my %s = map { $_ => $i->$_; }
 211                                 qw/copyfrom_path copyfrom_rev action/;
 212                         if ($s{'copyfrom_path'}) {
 213                                 $s{'copyfrom_path'} =~ s/$prefix_regex//;
 214                         }
 215                         $_[0]{$p} = \%s;
 216                 }
 217                 &$receiver(@_);
 218         });
 219
 220
 221         # the limit parameter was not supported in SVN 1.1.x, so we
 222         # drop it.  Therefore, the receiver callback passed to it
 223         # is made aware of this limitation by being wrapped if
 224         # the limit passed to is being wrapped.
 225         if (::compare_svn_version('1.2.0') <= 0) {
 226                 my $limit = splice(@args, 3, 1);
 227                 if ($limit > 0) {
 228                         my $receiver = pop @args;
 229                         push(@args, sub { &$receiver(@_) if (--$limit >= 0) });
 230                 }
 231         }
 232         my $ret = $self->SUPER::get_log(@args, $pool);
 233         $pool->clear;
 234         $ret;
 235 }
 236
 237 sub trees_match {
 238         my ($self, $url1, $rev1, $url2, $rev2) = @_;
 239         my $ctx = SVN::Client->new(auth => _auth_providers);
 240         my $out = IO::File->new_tmpfile;
 241
 242         # older SVN (1.1.x) doesn't take $pool as the last parameter for
 243         # $ctx->diff(), so we'll create a default one
 244         my $pool = SVN::Pool->new_default_sub;
 245
 246         $ra_invalid = 1; # this will open a new SVN::Ra connection to $url1
 247         $ctx->diff([], $url1, $rev1, $url2, $rev2, 1, 1, 0, $out, $out);
 248         $out->flush;
 249         my $ret = (($out->stat)[7] == 0);
 250         close $out or croak $!;
 251
 252         $ret;
 253 }
 254
 255 sub get_commit_editor {
 256         my ($self, $log, $cb, $pool) = @_;
 257
 258         my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef, 0) : ();
 259         $self->SUPER::get_commit_editor($log, $cb, @lock, $pool);
 260 }
 261
 262 sub gs_do_update {
 263         my ($self, $rev_a, $rev_b, $gs, $editor) = @_;
 264         my $new = ($rev_a == $rev_b);
 265         my $path = $gs->{path};
 266
 267         if ($new && -e $gs->{index}) {
 268                 unlink $gs->{index} or die
 269                   "Couldn't unlink index: $gs->{index}: $!\n";
 270         }
 271         my $pool = SVN::Pool->new;
 272         $editor->set_path_strip($path);
 273         my (@pc) = split m#/#, $path;
 274         my $reporter = $self->do_update($rev_b, (@pc ? shift @pc : ''),
 275                                         1, $editor, $pool);
 276         my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
 277
 278         # Since we can't rely on svn_ra_reparent being available, we'll
 279         # just have to do some magic with set_path to make it so
 280         # we only want a partial path.
 281         my $sp = '';
 282         my $final = join('/', @pc);
 283         while (@pc) {
 284                 $reporter->set_path($sp, $rev_b, 0, @lock, $pool);
 285                 $sp .= '/' if length $sp;
 286                 $sp .= shift @pc;
 287         }
 288         die "BUG: '$sp' != '$final'\n" if ($sp ne $final);
 289
 290         $reporter->set_path($sp, $rev_a, $new, @lock, $pool);
 291
 292         $reporter->finish_report($pool);
 293         $pool->clear;
 294         $editor->{git_commit_ok};
 295 }
 296
 297 # this requires SVN 1.4.3 or later (do_switch didn't work before 1.4.3, and
 298 # svn_ra_reparent didn't work before 1.4)
 299 sub gs_do_switch {
 300         my ($self, $rev_a, $rev_b, $gs, $url_b, $editor) = @_;
 301         my $path = $gs->{path};
 302         my $pool = SVN::Pool->new;
 303
 304         my $full_url = $self->url;
 305         my $old_url = $full_url;
 306         $full_url .= '/' . $path if length $path;
 307         my ($ra, $reparented);
 308
 309         if ($old_url =~ m#^svn(\+ssh)?://# ||
 310             ($full_url =~ m#^https?://# &&
 311              escape_url($full_url) ne $full_url)) {
 312                 $_[0] = undef;
 313                 $self = undef;
 314                 $RA = undef;
 315                 $ra = Git::SVN::Ra->new($full_url);
 316                 $ra_invalid = 1;
 317         } elsif ($old_url ne $full_url) {
 318                 SVN::_Ra::svn_ra_reparent($self->{session}, $full_url, $pool);
 319                 $self->url($full_url);
 320                 $reparented = 1;
 321         }
 322
 323         $ra ||= $self;
 324         $url_b = escape_url($url_b);
 325         my $reporter = $ra->do_switch($rev_b, '', 1, $url_b, $editor, $pool);
 326         my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
 327         $reporter->set_path('', $rev_a, 0, @lock, $pool);
 328         $reporter->finish_report($pool);
 329
 330         if ($reparented) {
 331                 SVN::_Ra::svn_ra_reparent($self->{session}, $old_url, $pool);
 332                 $self->url($old_url);
 333         }
 334
 335         $pool->clear;
 336         $editor->{git_commit_ok};
 337 }
 338
 339 sub longest_common_path {
 340         my ($gsv, $globs) = @_;
 341         my %common;
 342         my $common_max = scalar @$gsv;
 343
 344         foreach my $gs (@$gsv) {
 345                 my @tmp = split m#/#, $gs->{path};
 346                 my $p = '';
 347                 foreach (@tmp) {
 348                         $p .= length($p) ? "/$_" : $_;
 349                         $common{$p} ||= 0;
 350                         $common{$p}++;
 351                 }
 352         }
 353         $globs ||= [];
 354         $common_max += scalar @$globs;
 355         foreach my $glob (@$globs) {
 356                 my @tmp = split m#/#, $glob->{path}->{left};
 357                 my $p = '';
 358                 foreach (@tmp) {
 359                         $p .= length($p) ? "/$_" : $_;
 360                         $common{$p} ||= 0;
 361                         $common{$p}++;
 362                 }
 363         }
 364
 365         my $longest_path = '';
 366         foreach (sort {length $b <=> length $a} keys %common) {
 367                 if ($common{$_} == $common_max) {
 368                         $longest_path = $_;
 369                         last;
 370                 }
 371         }
 372         $longest_path;
 373 }
 374
 375 sub gs_fetch_loop_common {
 376         my ($self, $base, $head, $gsv, $globs) = @_;
 377         return if ($base > $head);
 378         my $inc = $_log_window_size;
 379         my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
 380         my $longest_path = longest_common_path($gsv, $globs);
 381         my $ra_url = $self->url;
 382         my $find_trailing_edge;
 383         while (1) {
 384                 my %revs;
 385                 my $err;
 386                 my $err_handler = $SVN::Error::handler;
 387                 $SVN::Error::handler = sub {
 388                         ($err) = @_;
 389                         skip_unknown_revs($err);
 390                 };
 391                 sub _cb {
 392                         my ($paths, $r, $author, $date, $log) = @_;
 393                         [ $paths,
 394                           { author => $author, date => $date, log => $log } ];
 395                 }
 396                 $self->get_log([$longest_path], $min, $max, 0, 1, 1,
 397                                sub { $revs{$_[1]} = _cb(@_) });
 398                 if ($err) {
 399                         print "Checked through r$max\r";
 400                 } else {
 401                         $find_trailing_edge = 1;
 402                 }
 403                 if ($err and $find_trailing_edge) {
 404                         print STDERR "Path '$longest_path' ",
 405                                      "was probably deleted:\n",
 406                                      $err->expanded_message,
 407                                      "\nWill attempt to follow ",
 408                                      "revisions r$min .. r$max ",
 409                                      "committed before the deletion\n";
 410                         my $hi = $max;
 411                         while (--$hi >= $min) {
 412                                 my $ok;
 413                                 $self->get_log([$longest_path], $min, $hi,
 414                                                0, 1, 1, sub {
 415                                                $ok = $_[1];
 416                                                $revs{$_[1]} = _cb(@_) });
 417                                 if ($ok) {
 418                                         print STDERR "r$min .. r$ok OK\n";
 419                                         last;
 420                                 }
 421                         }
 422                         $find_trailing_edge = 0;
 423                 }
 424                 $SVN::Error::handler = $err_handler;
 425
 426                 my %exists = map { $_->{path} => $_ } @$gsv;
 427                 foreach my $r (sort {$a <=> $b} keys %revs) {
 428                         my ($paths, $logged) = @{$revs{$r}};
 429
 430                         foreach my $gs ($self->match_globs(\%exists, $paths,
 431                                                            $globs, $r)) {
 432                                 if ($gs->rev_map_max >= $r) {
 433                                         next;
 434                                 }
 435                                 next unless $gs->match_paths($paths, $r);
 436                                 $gs->{logged_rev_props} = $logged;
 437                                 if (my $last_commit = $gs->last_commit) {
 438                                         $gs->assert_index_clean($last_commit);
 439                                 }
 440                                 my $log_entry = $gs->do_fetch($paths, $r);
 441                                 if ($log_entry) {
 442                                         $gs->do_git_commit($log_entry);
 443                                 }
 444                                 $Git::SVN::INDEX_FILES{$gs->{index}} = 1;
 445                         }
 446                         foreach my $g (@$globs) {
 447                                 my $k = "svn-remote.$g->{remote}." .
 448                                         "$g->{t}-maxRev";
 449                                 Git::SVN::tmp_config($k, $r);
 450                         }
 451                         if ($ra_invalid) {
 452                                 $_[0] = undef;
 453                                 $self = undef;
 454                                 $RA = undef;
 455                                 $self = Git::SVN::Ra->new($ra_url);
 456                                 $ra_invalid = undef;
 457                         }
 458                 }
 459                 # pre-fill the .rev_db since it'll eventually get filled in
 460                 # with '0' x40 if something new gets committed
 461                 foreach my $gs (@$gsv) {
 462                         next if $gs->rev_map_max >= $max;
 463                         next if defined $gs->rev_map_get($max);
 464                         $gs->rev_map_set($max, 0 x40);
 465                 }
 466                 foreach my $g (@$globs) {
 467                         my $k = "svn-remote.$g->{remote}.$g->{t}-maxRev";
 468                         Git::SVN::tmp_config($k, $max);
 469                 }
 470                 last if $max >= $head;
 471                 $min = $max + 1;
 472                 $max += $inc;
 473                 $max = $head if ($max > $head);
 474         }
 475         Git::SVN::gc();
 476 }
 477
 478 sub get_dir_globbed {
 479         my ($self, $left, $depth, $r) = @_;
 480
 481         my @x = eval { $self->get_dir($left, $r) };
 482         return unless scalar @x == 3;
 483         my $dirents = $x[0];
 484         my @finalents;
 485         foreach my $de (keys %$dirents) {
 486                 next if $dirents->{$de}->{kind} != $SVN::Node::dir;
 487                 if ($depth > 1) {
 488                         my @args = ("$left/$de", $depth - 1, $r);
 489                         foreach my $dir ($self->get_dir_globbed(@args)) {
 490                                 push @finalents, "$de/$dir";
 491                         }
 492                 } else {
 493                         push @finalents, $de;
 494                 }
 495         }
 496         @finalents;
 497 }
 498
 499 # return value: 0 -- don't ignore, 1 -- ignore
 500 sub is_ref_ignored {
 501         my ($g, $p) = @_;
 502         my $refname = $g->{ref}->full_path($p);
 503         return 1 if defined($g->{ignore_refs_regex}) &&
 504                     $refname =~ m!$g->{ignore_refs_regex}!;
 505         return 0 unless defined($_ignore_refs_regex);
 506         return 1 if $refname =~ m!$_ignore_refs_regex!o;
 507         return 0;
 508 }
 509
 510 sub match_globs {
 511         my ($self, $exists, $paths, $globs, $r) = @_;
 512
 513         sub get_dir_check {
 514                 my ($self, $exists, $g, $r) = @_;
 515
 516                 my @dirs = $self->get_dir_globbed($g->{path}->{left},
 517                                                   $g->{path}->{depth},
 518                                                   $r);
 519
 520                 foreach my $de (@dirs) {
 521                         my $p = $g->{path}->full_path($de);
 522                         next if $exists->{$p};
 523                         next if (length $g->{path}->{right} &&
 524                                  ($self->check_path($p, $r) !=
 525                                   $SVN::Node::dir));
 526                         next unless $p =~ /$g->{path}->{regex}/;
 527                         $exists->{$p} = Git::SVN->init($self->url, $p, undef,
 528                                          $g->{ref}->full_path($de), 1);
 529                 }
 530         }
 531         foreach my $g (@$globs) {
 532                 if (my $path = $paths->{"/$g->{path}->{left}"}) {
 533                         if ($path->{action} =~ /^[AR]$/) {
 534                                 get_dir_check($self, $exists, $g, $r);
 535                         }
 536                 }
 537                 foreach (keys %$paths) {
 538                         if (/$g->{path}->{left_regex}/ &&
 539                             !/$g->{path}->{regex}/) {
 540                                 next if $paths->{$_}->{action} !~ /^[AR]$/;
 541                                 get_dir_check($self, $exists, $g, $r);
 542                         }
 543                         next unless /$g->{path}->{regex}/;
 544                         my $p = $1;
 545                         my $pathname = $g->{path}->full_path($p);
 546                         next if is_ref_ignored($g, $p);
 547                         next if $exists->{$pathname};
 548                         next if ($self->check_path($pathname, $r) !=
 549                                  $SVN::Node::dir);
 550                         $exists->{$pathname} = Git::SVN->init(
 551                                               $self->url, $pathname, undef,
 552                                               $g->{ref}->full_path($p), 1);
 553                 }
 554                 my $c = '';
 555                 foreach (split m#/#, $g->{path}->{left}) {
 556                         $c .= "/$_";
 557                         next unless ($paths->{$c} &&
 558                                      ($paths->{$c}->{action} =~ /^[AR]$/));
 559                         get_dir_check($self, $exists, $g, $r);
 560                 }
 561         }
 562         values %$exists;
 563 }
 564
 565 sub minimize_url {
 566         my ($self) = @_;
 567         return $self->url if ($self->url eq $self->{repos_root});
 568         my $url = $self->{repos_root};
 569         my @components = split(m!/!, $self->{svn_path});
 570         my $c = '';
 571         do {
 572                 $url .= "/$c" if length $c;
 573                 eval {
 574                         my $ra = (ref $self)->new($url);
 575                         my $latest = $ra->get_latest_revnum;
 576                         $ra->get_log("", $latest, 0, 1, 0, 1, sub {});
 577                 };
 578         } while ($@ && ($c = shift @components));
 579         $url;
 580 }
 581
 582 sub can_do_switch {
 583         my $self = shift;
 584         unless (defined $can_do_switch) {
 585                 my $pool = SVN::Pool->new;
 586                 my $rep = eval {
 587                         $self->do_switch(1, '', 0, $self->url,
 588                                          SVN::Delta::Editor->new, $pool);
 589                 };
 590                 if ($@) {
 591                         $can_do_switch = 0;
 592                 } else {
 593                         $rep->abort_report($pool);
 594                         $can_do_switch = 1;
 595                 }
 596                 $pool->clear;
 597         }
 598         $can_do_switch;
 599 }
 600
 601 sub skip_unknown_revs {
 602         my ($err) = @_;
 603         my $errno = $err->apr_err();
 604         # Maybe the branch we're tracking didn't
 605         # exist when the repo started, so it's
 606         # not an error if it doesn't, just continue
 607         #
 608         # Wonderfully consistent library, eh?
 609         # 160013 - svn:// and file://
 610         # 175002 - http(s)://
 611         # 175007 - http(s):// (this repo required authorization, too...)
 612         #   More codes may be discovered later...
 613         if ($errno == 175007 || $errno == 175002 || $errno == 160013) {
 614                 my $err_key = $err->expanded_message;
 615                 # revision numbers change every time, filter them out
 616                 $err_key =~ s/\d+/\0/g;
 617                 $err_key = "$errno\0$err_key";
 618                 unless ($ignored_err{$err_key}) {
 619                         warn "W: Ignoring error from SVN, path probably ",
 620                              "does not exist: ($errno): ",
 621                              $err->expanded_message,"\n";
 622                         warn "W: Do not be alarmed at the above message ",
 623                              "git-svn is just searching aggressively for ",
 624                              "old history.\n",
 625                              "This may take a while on large repositories\n";
 626                         $ignored_err{$err_key} = 1;
 627                 }
 628                 return;
 629         }
 630         die "Error from SVN, ($errno): ", $err->expanded_message,"\n";
 631 }
 632
 633 1;
 634 __END__
 635
 636 Git::SVN::Ra - Subversion remote access functions for git-svn
 637
 638 =head1 SYNOPSIS
 639
 640     use Git::SVN::Ra;
 641
 642     my $ra = Git::SVN::Ra->new($branchurl);
 643     my ($dirents, $fetched_revnum, $props) =
 644         $ra->get_dir('.', $SVN::Core::INVALID_REVNUM);
 645
 646 =head1 DESCRIPTION
 647
 648 This is a wrapper around the L<SVN::Ra> module for use by B<git-svn>.
 649 It fills in some default parameters (such as the authentication
 650 scheme), smooths over incompatibilities between libsvn versions, adds
 651 caching, and implements some functions specific to B<git-svn>.
 652
 653 Do not use it unless you are developing git-svn.  The interface will
 654 change as git-svn evolves.
 655
 656 =head1 DEPENDENCIES
 657
 658 Subversion perl bindings,
 659 L<Git::SVN>.
 660
 661 C<Git::SVN::Ra> has not been tested using callers other than
 662 B<git-svn> itself.
 663
 664 =head1 SEE ALSO
 665
 666 L<SVN::Ra>.
 667
 668 =head1 INCOMPATIBILITIES
 669
 670 None reported.
 671
 672 =head1 BUGS
 673
 674 None.