perl/Git/SVN/Ra.pm

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