perl/Git/SVN/Ra.pm

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