Andrew's git / gitweb.git / perl/Git/SVN/Ra.pm
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perl / Git / SVN / Ra.pmon commit Merge branch 'jl/status-added-submodule-is-never-ignored' (6d681f0)
   1package Git::SVN::Ra;
   2use vars qw/@ISA $config_dir $_ignore_refs_regex $_log_window_size/;
   3use strict;
   4use warnings;
   5use SVN::Client;
   6use Git::SVN::Utils qw(
   7        canonicalize_url
   8        canonicalize_path
   9        add_path_to_url
  10);
  11
  12use SVN::Ra;
  13BEGIN {
  14        @ISA = qw(SVN::Ra);
  15}
  16
  17my ($ra_invalid, $can_do_switch, %ignored_err, $RA);
  18
  19BEGIN {
  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# serf has a bug that leads to a coredump upon termination if the
  36# remote access object is left around (not fixed yet in serf 1.3.1).
  37# Explicitly free it to work around the issue.
  38END {
  39        $RA = undef;
  40        $ra_invalid = 1;
  41}
  42
  43sub _auth_providers () {
  44        my @rv = (
  45          SVN::Client::get_simple_provider(),
  46          SVN::Client::get_ssl_server_trust_file_provider(),
  47          SVN::Client::get_simple_prompt_provider(
  48            \&Git::SVN::Prompt::simple, 2),
  49          SVN::Client::get_ssl_client_cert_file_provider(),
  50          SVN::Client::get_ssl_client_cert_prompt_provider(
  51            \&Git::SVN::Prompt::ssl_client_cert, 2),
  52          SVN::Client::get_ssl_client_cert_pw_file_provider(),
  53          SVN::Client::get_ssl_client_cert_pw_prompt_provider(
  54            \&Git::SVN::Prompt::ssl_client_cert_pw, 2),
  55          SVN::Client::get_username_provider(),
  56          SVN::Client::get_ssl_server_trust_prompt_provider(
  57            \&Git::SVN::Prompt::ssl_server_trust),
  58          SVN::Client::get_username_prompt_provider(
  59            \&Git::SVN::Prompt::username, 2)
  60        );
  61
  62        # earlier 1.6.x versions would segfault, and <= 1.5.x didn't have
  63        # this function
  64        if (::compare_svn_version('1.6.15') >= 0) {
  65                my $config = SVN::Core::config_get_config($config_dir);
  66                my ($p, @a);
  67                # config_get_config returns all config files from
  68                # ~/.subversion, auth_get_platform_specific_client_providers
  69                # just wants the config "file".
  70                @a = ($config->{'config'}, undef);
  71                $p = SVN::Core::auth_get_platform_specific_client_providers(@a);
  72                # Insert the return value from
  73                # auth_get_platform_specific_providers
  74                unshift @rv, @$p;
  75        }
  76        \@rv;
  77}
  78
  79
  80sub new {
  81        my ($class, $url) = @_;
  82        $url = canonicalize_url($url);
  83        return $RA if ($RA && $RA->url eq $url);
  84
  85        ::_req_svn();
  86
  87        SVN::_Core::svn_config_ensure($config_dir, undef);
  88        my ($baton, $callbacks) = SVN::Core::auth_open_helper(_auth_providers);
  89        my $config = SVN::Core::config_get_config($config_dir);
  90        $RA = undef;
  91        my $dont_store_passwords = 1;
  92        my $conf_t = ${$config}{'config'};
  93        {
  94                no warnings 'once';
  95                # The usage of $SVN::_Core::SVN_CONFIG_* variables
  96                # produces warnings that variables are used only once.
  97                # I had not found the better way to shut them up, so
  98                # the warnings of type 'once' are disabled in this block.
  99                if (SVN::_Core::svn_config_get_bool($conf_t,
 100                    $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
 101                    $SVN::_Core::SVN_CONFIG_OPTION_STORE_PASSWORDS,
 102                    1) == 0) {
 103                        SVN::_Core::svn_auth_set_parameter($baton,
 104                            $SVN::_Core::SVN_AUTH_PARAM_DONT_STORE_PASSWORDS,
 105                            bless (\$dont_store_passwords, "_p_void"));
 106                }
 107                if (SVN::_Core::svn_config_get_bool($conf_t,
 108                    $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
 109                    $SVN::_Core::SVN_CONFIG_OPTION_STORE_AUTH_CREDS,
 110                    1) == 0) {
 111                        $Git::SVN::Prompt::_no_auth_cache = 1;
 112                }
 113        } # no warnings 'once'
 114
 115        my $self = SVN::Ra->new(url => $url, auth => $baton,
 116                              config => $config,
 117                              pool => SVN::Pool->new,
 118                              auth_provider_callbacks => $callbacks);
 119        $RA = bless $self, $class;
 120
 121        # Make sure its canonicalized
 122        $self->url($url);
 123        $self->{svn_path} = $url;
 124        $self->{repos_root} = $self->get_repos_root;
 125        $self->{svn_path} =~ s#^\Q$self->{repos_root}\E(/|$)##;
 126        $self->{cache} = { check_path => { r => 0, data => {} },
 127                           get_dir => { r => 0, data => {} } };
 128
 129        return $RA;
 130}
 131
 132sub url {
 133        my $self = shift;
 134
 135        if (@_) {
 136                my $url = shift;
 137                $self->{url} = canonicalize_url($url);
 138                return;
 139        }
 140
 141        return $self->{url};
 142}
 143
 144sub check_path {
 145        my ($self, $path, $r) = @_;
 146        my $cache = $self->{cache}->{check_path};
 147        if ($r == $cache->{r} && exists $cache->{data}->{$path}) {
 148                return $cache->{data}->{$path};
 149        }
 150        my $pool = SVN::Pool->new;
 151        my $t = $self->SUPER::check_path($path, $r, $pool);
 152        $pool->clear;
 153        if ($r != $cache->{r}) {
 154                %{$cache->{data}} = ();
 155                $cache->{r} = $r;
 156        }
 157        $cache->{data}->{$path} = $t;
 158}
 159
 160sub get_dir {
 161        my ($self, $dir, $r) = @_;
 162        my $cache = $self->{cache}->{get_dir};
 163        if ($r == $cache->{r}) {
 164                if (my $x = $cache->{data}->{$dir}) {
 165                        return wantarray ? @$x : $x->[0];
 166                }
 167        }
 168        my $pool = SVN::Pool->new;
 169        my ($d, undef, $props) = $self->SUPER::get_dir($dir, $r, $pool);
 170        my %dirents = map { $_ => { kind => $d->{$_}->kind } } keys %$d;
 171        $pool->clear;
 172        if ($r != $cache->{r}) {
 173                %{$cache->{data}} = ();
 174                $cache->{r} = $r;
 175        }
 176        $cache->{data}->{$dir} = [ \%dirents, $r, $props ];
 177        wantarray ? (\%dirents, $r, $props) : \%dirents;
 178}
 179
 180sub DESTROY {
 181        # do not call the real DESTROY since we store ourselves in $RA
 182}
 183
 184# get_log(paths, start, end, limit,
 185#         discover_changed_paths, strict_node_history, receiver)
 186sub get_log {
 187        my ($self, @args) = @_;
 188        my $pool = SVN::Pool->new;
 189
 190        # svn_log_changed_path_t objects passed to get_log are likely to be
 191        # overwritten even if only the refs are copied to an external variable,
 192        # so we should dup the structures in their entirety.  Using an
 193        # externally passed pool (instead of our temporary and quickly cleared
 194        # pool in Git::SVN::Ra) does not help matters at all...
 195        my $receiver = pop @args;
 196        my $prefix = "/".$self->{svn_path};
 197        $prefix =~ s#/+($)##;
 198        my $prefix_regex = qr#^\Q$prefix\E#;
 199        push(@args, sub {
 200                my ($paths) = $_[0];
 201                return &$receiver(@_) unless $paths;
 202                $_[0] = ();
 203                foreach my $p (keys %$paths) {
 204                        my $i = $paths->{$p};
 205                        # Make path relative to our url, not repos_root
 206                        $p =~ s/$prefix_regex//;
 207                        my %s = map { $_ => $i->$_; }
 208                                qw/copyfrom_path copyfrom_rev action/;
 209                        if ($s{'copyfrom_path'}) {
 210                                $s{'copyfrom_path'} =~ s/$prefix_regex//;
 211                                $s{'copyfrom_path'} = canonicalize_path($s{'copyfrom_path'});
 212                        }
 213                        $_[0]{$p} = \%s;
 214                }
 215                &$receiver(@_);
 216        });
 217
 218
 219        # the limit parameter was not supported in SVN 1.1.x, so we
 220        # drop it.  Therefore, the receiver callback passed to it
 221        # is made aware of this limitation by being wrapped if
 222        # the limit passed to is being wrapped.
 223        if (::compare_svn_version('1.2.0') <= 0) {
 224                my $limit = splice(@args, 3, 1);
 225                if ($limit > 0) {
 226                        my $receiver = pop @args;
 227                        push(@args, sub { &$receiver(@_) if (--$limit >= 0) });
 228                }
 229        }
 230        my $ret = $self->SUPER::get_log(@args, $pool);
 231        $pool->clear;
 232        $ret;
 233}
 234
 235sub trees_match {
 236        my ($self, $url1, $rev1, $url2, $rev2) = @_;
 237        my $ctx = SVN::Client->new(auth => _auth_providers);
 238        my $out = IO::File->new_tmpfile;
 239
 240        # older SVN (1.1.x) doesn't take $pool as the last parameter for
 241        # $ctx->diff(), so we'll create a default one
 242        my $pool = SVN::Pool->new_default_sub;
 243
 244        $ra_invalid = 1; # this will open a new SVN::Ra connection to $url1
 245        $ctx->diff([], $url1, $rev1, $url2, $rev2, 1, 1, 0, $out, $out);
 246        $out->flush;
 247        my $ret = (($out->stat)[7] == 0);
 248        close $out or croak $!;
 249
 250        $ret;
 251}
 252
 253sub get_commit_editor {
 254        my ($self, $log, $cb, $pool) = @_;
 255
 256        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef, 0) : ();
 257        $self->SUPER::get_commit_editor($log, $cb, @lock, $pool);
 258}
 259
 260sub gs_do_update {
 261        my ($self, $rev_a, $rev_b, $gs, $editor) = @_;
 262        my $new = ($rev_a == $rev_b);
 263        my $path = $gs->path;
 264
 265        if ($new && -e $gs->{index}) {
 266                unlink $gs->{index} or die
 267                  "Couldn't unlink index: $gs->{index}: $!\n";
 268        }
 269        my $pool = SVN::Pool->new;
 270        $editor->set_path_strip($path);
 271        my (@pc) = split m#/#, $path;
 272        my $reporter = $self->do_update($rev_b, (@pc ? shift @pc : ''),
 273                                        1, $editor, $pool);
 274        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
 275
 276        # Since we can't rely on svn_ra_reparent being available, we'll
 277        # just have to do some magic with set_path to make it so
 278        # we only want a partial path.
 279        my $sp = '';
 280        my $final = join('/', @pc);
 281        while (@pc) {
 282                $reporter->set_path($sp, $rev_b, 0, @lock, $pool);
 283                $sp .= '/' if length $sp;
 284                $sp .= shift @pc;
 285        }
 286        die "BUG: '$sp' != '$final'\n" if ($sp ne $final);
 287
 288        $reporter->set_path($sp, $rev_a, $new, @lock, $pool);
 289
 290        $reporter->finish_report($pool);
 291        $pool->clear;
 292        $editor->{git_commit_ok};
 293}
 294
 295# this requires SVN 1.4.3 or later (do_switch didn't work before 1.4.3, and
 296# svn_ra_reparent didn't work before 1.4)
 297sub gs_do_switch {
 298        my ($self, $rev_a, $rev_b, $gs, $url_b, $editor) = @_;
 299        my $path = $gs->path;
 300        my $pool = SVN::Pool->new;
 301
 302        my $old_url = $self->url;
 303        my $full_url = add_path_to_url( $self->url, $path );
 304        my ($ra, $reparented);
 305
 306        if ($old_url =~ m#^svn(\+\w+)?://# ||
 307            ($full_url =~ m#^https?://# &&
 308             canonicalize_url($full_url) ne $full_url)) {
 309                $_[0] = undef;
 310                $self = undef;
 311                $RA = undef;
 312                $ra = Git::SVN::Ra->new($full_url);
 313                $ra_invalid = 1;
 314        } elsif ($old_url ne $full_url) {
 315                SVN::_Ra::svn_ra_reparent(
 316                        $self->{session},
 317                        canonicalize_url($full_url),
 318                        $pool
 319                );
 320                $self->url($full_url);
 321                $reparented = 1;
 322        }
 323
 324        $ra ||= $self;
 325        $url_b = canonicalize_url($url_b);
 326        my $reporter = $ra->do_switch($rev_b, '', 1, $url_b, $editor, $pool);
 327        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
 328        $reporter->set_path('', $rev_a, 0, @lock, $pool);
 329        $reporter->finish_report($pool);
 330
 331        if ($reparented) {
 332                SVN::_Ra::svn_ra_reparent($self->{session}, $old_url, $pool);
 333                $self->url($old_url);
 334        }
 335
 336        $pool->clear;
 337        $editor->{git_commit_ok};
 338}
 339
 340sub longest_common_path {
 341        my ($gsv, $globs) = @_;
 342        my %common;
 343        my $common_max = scalar @$gsv;
 344
 345        foreach my $gs (@$gsv) {
 346                my @tmp = split m#/#, $gs->path;
 347                my $p = '';
 348                foreach (@tmp) {
 349                        $p .= length($p) ? "/$_" : $_;
 350                        $common{$p} ||= 0;
 351                        $common{$p}++;
 352                }
 353        }
 354        $globs ||= [];
 355        $common_max += scalar @$globs;
 356        foreach my $glob (@$globs) {
 357                my @tmp = split m#/#, $glob->{path}->{left};
 358                my $p = '';
 359                foreach (@tmp) {
 360                        $p .= length($p) ? "/$_" : $_;
 361                        $common{$p} ||= 0;
 362                        $common{$p}++;
 363                }
 364        }
 365
 366        my $longest_path = '';
 367        foreach (sort {length $b <=> length $a} keys %common) {
 368                if ($common{$_} == $common_max) {
 369                        $longest_path = $_;
 370                        last;
 371                }
 372        }
 373        $longest_path;
 374}
 375
 376sub gs_fetch_loop_common {
 377        my ($self, $base, $head, $gsv, $globs) = @_;
 378        return if ($base > $head);
 379        my $inc = $_log_window_size;
 380        my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
 381        my $longest_path = longest_common_path($gsv, $globs);
 382        my $ra_url = $self->url;
 383        my $find_trailing_edge;
 384        while (1) {
 385                my %revs;
 386                my $err;
 387                my $err_handler = $SVN::Error::handler;
 388                $SVN::Error::handler = sub {
 389                        ($err) = @_;
 390                        skip_unknown_revs($err);
 391                };
 392                sub _cb {
 393                        my ($paths, $r, $author, $date, $log) = @_;
 394                        [ $paths,
 395                          { author => $author, date => $date, log => $log } ];
 396                }
 397                $self->get_log([$longest_path], $min, $max, 0, 1, 1,
 398                               sub { $revs{$_[1]} = _cb(@_) });
 399                if ($err) {
 400                        print "Checked through r$max\r";
 401                } else {
 402                        $find_trailing_edge = 1;
 403                }
 404                if ($err and $find_trailing_edge) {
 405                        print STDERR "Path '$longest_path' ",
 406                                     "was probably deleted:\n",
 407                                     $err->expanded_message,
 408                                     "\nWill attempt to follow ",
 409                                     "revisions r$min .. r$max ",
 410                                     "committed before the deletion\n";
 411                        my $hi = $max;
 412                        while (--$hi >= $min) {
 413                                my $ok;
 414                                $self->get_log([$longest_path], $min, $hi,
 415                                               0, 1, 1, sub {
 416                                               $ok = $_[1];
 417                                               $revs{$_[1]} = _cb(@_) });
 418                                if ($ok) {
 419                                        print STDERR "r$min .. r$ok OK\n";
 420                                        last;
 421                                }
 422                        }
 423                        $find_trailing_edge = 0;
 424                }
 425                $SVN::Error::handler = $err_handler;
 426
 427                my %exists = map { $_->path => $_ } @$gsv;
 428                foreach my $r (sort {$a <=> $b} keys %revs) {
 429                        my ($paths, $logged) = @{$revs{$r}};
 430
 431                        foreach my $gs ($self->match_globs(\%exists, $paths,
 432                                                           $globs, $r)) {
 433                                if ($gs->rev_map_max >= $r) {
 434                                        next;
 435                                }
 436                                next unless $gs->match_paths($paths, $r);
 437                                $gs->{logged_rev_props} = $logged;
 438                                if (my $last_commit = $gs->last_commit) {
 439                                        $gs->assert_index_clean($last_commit);
 440                                }
 441                                my $log_entry = $gs->do_fetch($paths, $r);
 442                                if ($log_entry) {
 443                                        $gs->do_git_commit($log_entry);
 444                                }
 445                                $Git::SVN::INDEX_FILES{$gs->{index}} = 1;
 446                        }
 447                        foreach my $g (@$globs) {
 448                                my $k = "svn-remote.$g->{remote}." .
 449                                        "$g->{t}-maxRev";
 450                                Git::SVN::tmp_config($k, $r);
 451                        }
 452                        if ($ra_invalid) {
 453                                $_[0] = undef;
 454                                $self = undef;
 455                                $RA = undef;
 456                                $self = Git::SVN::Ra->new($ra_url);
 457                                $ra_invalid = undef;
 458                        }
 459                }
 460                # pre-fill the .rev_db since it'll eventually get filled in
 461                # with '0' x40 if something new gets committed
 462                foreach my $gs (@$gsv) {
 463                        next if $gs->rev_map_max >= $max;
 464                        next if defined $gs->rev_map_get($max);
 465                        $gs->rev_map_set($max, 0 x40);
 466                }
 467                foreach my $g (@$globs) {
 468                        my $k = "svn-remote.$g->{remote}.$g->{t}-maxRev";
 469                        Git::SVN::tmp_config($k, $max);
 470                }
 471                last if $max >= $head;
 472                $min = $max + 1;
 473                $max += $inc;
 474                $max = $head if ($max > $head);
 475        }
 476        Git::SVN::gc();
 477}
 478
 479sub get_dir_globbed {
 480        my ($self, $left, $depth, $r) = @_;
 481
 482        my @x = eval { $self->get_dir($left, $r) };
 483        return unless scalar @x == 3;
 484        my $dirents = $x[0];
 485        my @finalents;
 486        foreach my $de (keys %$dirents) {
 487                next if $dirents->{$de}->{kind} != $SVN::Node::dir;
 488                if ($depth > 1) {
 489                        my @args = ("$left/$de", $depth - 1, $r);
 490                        foreach my $dir ($self->get_dir_globbed(@args)) {
 491                                push @finalents, "$de/$dir";
 492                        }
 493                } else {
 494                        push @finalents, $de;
 495                }
 496        }
 497        @finalents;
 498}
 499
 500# return value: 0 -- don't ignore, 1 -- ignore
 501sub is_ref_ignored {
 502        my ($g, $p) = @_;
 503        my $refname = $g->{ref}->full_path($p);
 504        return 1 if defined($g->{ignore_refs_regex}) &&
 505                    $refname =~ m!$g->{ignore_refs_regex}!;
 506        return 0 unless defined($_ignore_refs_regex);
 507        return 1 if $refname =~ m!$_ignore_refs_regex!o;
 508        return 0;
 509}
 510
 511sub match_globs {
 512        my ($self, $exists, $paths, $globs, $r) = @_;
 513
 514        sub get_dir_check {
 515                my ($self, $exists, $g, $r) = @_;
 516
 517                my @dirs = $self->get_dir_globbed($g->{path}->{left},
 518                                                  $g->{path}->{depth},
 519                                                  $r);
 520
 521                foreach my $de (@dirs) {
 522                        my $p = $g->{path}->full_path($de);
 523                        next if $exists->{$p};
 524                        next if (length $g->{path}->{right} &&
 525                                 ($self->check_path($p, $r) !=
 526                                  $SVN::Node::dir));
 527                        next unless $p =~ /$g->{path}->{regex}/;
 528                        $exists->{$p} = Git::SVN->init($self->url, $p, undef,
 529                                         $g->{ref}->full_path($de), 1);
 530                }
 531        }
 532        foreach my $g (@$globs) {
 533                if (my $path = $paths->{"/$g->{path}->{left}"}) {
 534                        if ($path->{action} =~ /^[AR]$/) {
 535                                get_dir_check($self, $exists, $g, $r);
 536                        }
 537                }
 538                foreach (keys %$paths) {
 539                        if (/$g->{path}->{left_regex}/ &&
 540                            !/$g->{path}->{regex}/) {
 541                                next if $paths->{$_}->{action} !~ /^[AR]$/;
 542                                get_dir_check($self, $exists, $g, $r);
 543                        }
 544                        next unless /$g->{path}->{regex}/;
 545                        my $p = $1;
 546                        my $pathname = $g->{path}->full_path($p);
 547                        next if is_ref_ignored($g, $p);
 548                        next if $exists->{$pathname};
 549                        next if ($self->check_path($pathname, $r) !=
 550                                 $SVN::Node::dir);
 551                        $exists->{$pathname} = Git::SVN->init(
 552                                              $self->url, $pathname, undef,
 553                                              $g->{ref}->full_path($p), 1);
 554                }
 555                my $c = '';
 556                foreach (split m#/#, $g->{path}->{left}) {
 557                        $c .= "/$_";
 558                        next unless ($paths->{$c} &&
 559                                     ($paths->{$c}->{action} =~ /^[AR]$/));
 560                        get_dir_check($self, $exists, $g, $r);
 561                }
 562        }
 563        values %$exists;
 564}
 565
 566sub minimize_url {
 567        my ($self) = @_;
 568        return $self->url if ($self->url eq $self->{repos_root});
 569        my $url = $self->{repos_root};
 570        my @components = split(m!/!, $self->{svn_path});
 571        my $c = '';
 572        do {
 573                $url = add_path_to_url($url, $c);
 574                eval {
 575                        my $ra = (ref $self)->new($url);
 576                        my $latest = $ra->get_latest_revnum;
 577                        $ra->get_log("", $latest, 0, 1, 0, 1, sub {});
 578                };
 579        } while ($@ && ($c = shift @components));
 580
 581        return canonicalize_url($url);
 582}
 583
 584sub can_do_switch {
 585        my $self = shift;
 586        unless (defined $can_do_switch) {
 587                my $pool = SVN::Pool->new;
 588                my $rep = eval {
 589                        $self->do_switch(1, '', 0, $self->url,
 590                                         SVN::Delta::Editor->new, $pool);
 591                };
 592                if ($@) {
 593                        $can_do_switch = 0;
 594                } else {
 595                        $rep->abort_report($pool);
 596                        $can_do_switch = 1;
 597                }
 598                $pool->clear;
 599        }
 600        $can_do_switch;
 601}
 602
 603sub skip_unknown_revs {
 604        my ($err) = @_;
 605        my $errno = $err->apr_err();
 606        # Maybe the branch we're tracking didn't
 607        # exist when the repo started, so it's
 608        # not an error if it doesn't, just continue
 609        #
 610        # Wonderfully consistent library, eh?
 611        # 160013 - svn:// and file://
 612        # 175002 - http(s)://
 613        # 175007 - http(s):// (this repo required authorization, too...)
 614        #   More codes may be discovered later...
 615        if ($errno == 175007 || $errno == 175002 || $errno == 160013) {
 616                my $err_key = $err->expanded_message;
 617                # revision numbers change every time, filter them out
 618                $err_key =~ s/\d+/\0/g;
 619                $err_key = "$errno\0$err_key";
 620                unless ($ignored_err{$err_key}) {
 621                        warn "W: Ignoring error from SVN, path probably ",
 622                             "does not exist: ($errno): ",
 623                             $err->expanded_message,"\n";
 624                        warn "W: Do not be alarmed at the above message ",
 625                             "git-svn is just searching aggressively for ",
 626                             "old history.\n",
 627                             "This may take a while on large repositories\n";
 628                        $ignored_err{$err_key} = 1;
 629                }
 630                return;
 631        }
 632        die "Error from SVN, ($errno): ", $err->expanded_message,"\n";
 633}
 634
 6351;
 636__END__
 637
 638=head1 NAME
 639
 640Git::SVN::Ra - Subversion remote access functions for git-svn
 641
 642=head1 SYNOPSIS
 643
 644    use Git::SVN::Ra;
 645
 646    my $ra = Git::SVN::Ra->new($branchurl);
 647    my ($dirents, $fetched_revnum, $props) =
 648        $ra->get_dir('.', $SVN::Core::INVALID_REVNUM);
 649
 650=head1 DESCRIPTION
 651
 652This is a wrapper around the L<SVN::Ra> module for use by B<git-svn>.
 653It fills in some default parameters (such as the authentication
 654scheme), smooths over incompatibilities between libsvn versions, adds
 655caching, and implements some functions specific to B<git-svn>.
 656
 657Do not use it unless you are developing git-svn.  The interface will
 658change as git-svn evolves.
 659
 660=head1 DEPENDENCIES
 661
 662Subversion perl bindings,
 663L<Git::SVN>.
 664
 665C<Git::SVN::Ra> has not been tested using callers other than
 666B<git-svn> itself.
 667
 668=head1 SEE ALSO
 669
 670L<SVN::Ra>.
 671
 672=head1 INCOMPATIBILITIES
 673
 674None reported.
 675
 676=head1 BUGS
 677
 678None.