Andrew's git - gitweb.git/blob

77bceb913ab866b9552487879394b6adc84567b4
   1package Git::SVN::Ra;
   2use vars qw/@ISA $config_dir $_ignore_refs_regex $_log_window_size/;
   3use strict;
   4use warnings;
   5use SVN::Client;
   6use Git::SVN::Utils qw(
   7        canonicalize_url
   8);
   9
  10use SVN::Ra;
  11BEGIN {
  12        @ISA = qw(SVN::Ra);
  13}
  14
  15my ($ra_invalid, $can_do_switch, %ignored_err, $RA);
  16
  17BEGIN {
  18        # enforce temporary pool usage for some simple functions
  19        no strict 'refs';
  20        for my $f (qw/rev_proplist get_latest_revnum get_uuid get_repos_root
  21                      get_file/) {
  22                my $SUPER = "SUPER::$f";
  23                *$f = sub {
  24                        my $self = shift;
  25                        my $pool = SVN::Pool->new;
  26                        my @ret = $self->$SUPER(@_,$pool);
  27                        $pool->clear;
  28                        wantarray ? @ret : $ret[0];
  29                };
  30        }
  31}
  32
  33sub _auth_providers () {
  34        my @rv = (
  35          SVN::Client::get_simple_provider(),
  36          SVN::Client::get_ssl_server_trust_file_provider(),
  37          SVN::Client::get_simple_prompt_provider(
  38            \&Git::SVN::Prompt::simple, 2),
  39          SVN::Client::get_ssl_client_cert_file_provider(),
  40          SVN::Client::get_ssl_client_cert_prompt_provider(
  41            \&Git::SVN::Prompt::ssl_client_cert, 2),
  42          SVN::Client::get_ssl_client_cert_pw_file_provider(),
  43          SVN::Client::get_ssl_client_cert_pw_prompt_provider(
  44            \&Git::SVN::Prompt::ssl_client_cert_pw, 2),
  45          SVN::Client::get_username_provider(),
  46          SVN::Client::get_ssl_server_trust_prompt_provider(
  47            \&Git::SVN::Prompt::ssl_server_trust),
  48          SVN::Client::get_username_prompt_provider(
  49            \&Git::SVN::Prompt::username, 2)
  50        );
  51
  52        # earlier 1.6.x versions would segfault, and <= 1.5.x didn't have
  53        # this function
  54        if (::compare_svn_version('1.6.15') >= 0) {
  55                my $config = SVN::Core::config_get_config($config_dir);
  56                my ($p, @a);
  57                # config_get_config returns all config files from
  58                # ~/.subversion, auth_get_platform_specific_client_providers
  59                # just wants the config "file".
  60                @a = ($config->{'config'}, undef);
  61                $p = SVN::Core::auth_get_platform_specific_client_providers(@a);
  62                # Insert the return value from
  63                # auth_get_platform_specific_providers
  64                unshift @rv, @$p;
  65        }
  66        \@rv;
  67}
  68
  69sub escape_uri_only {
  70        my ($uri) = @_;
  71        my @tmp;
  72        foreach (split m{/}, $uri) {
  73                s/([^~\w.%+-]|%(?![a-fA-F0-9]{2}))/sprintf("%%%02X",ord($1))/eg;
  74                push @tmp, $_;
  75        }
  76        join('/', @tmp);
  77}
  78
  79sub escape_url {
  80        my ($url) = @_;
  81        if ($url =~ m#^(https?)://([^/]+)(.*)$#) {
  82                my ($scheme, $domain, $uri) = ($1, $2, escape_uri_only($3));
  83                $url = "$scheme://$domain$uri";
  84        }
  85        $url;
  86}
  87
  88sub new {
  89        my ($class, $url) = @_;
  90        $url =~ s!/+$!!;
  91        return $RA if ($RA && $RA->url eq $url);
  92
  93        ::_req_svn();
  94
  95        SVN::_Core::svn_config_ensure($config_dir, undef);
  96        my ($baton, $callbacks) = SVN::Core::auth_open_helper(_auth_providers);
  97        my $config = SVN::Core::config_get_config($config_dir);
  98        $RA = undef;
  99        my $dont_store_passwords = 1;
 100        my $conf_t = ${$config}{'config'};
 101        {
 102                no warnings 'once';
 103                # The usage of $SVN::_Core::SVN_CONFIG_* variables
 104                # produces warnings that variables are used only once.
 105                # I had not found the better way to shut them up, so
 106                # the warnings of type 'once' are disabled in this block.
 107                if (SVN::_Core::svn_config_get_bool($conf_t,
 108                    $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
 109                    $SVN::_Core::SVN_CONFIG_OPTION_STORE_PASSWORDS,
 110                    1) == 0) {
 111                        SVN::_Core::svn_auth_set_parameter($baton,
 112                            $SVN::_Core::SVN_AUTH_PARAM_DONT_STORE_PASSWORDS,
 113                            bless (\$dont_store_passwords, "_p_void"));
 114                }
 115                if (SVN::_Core::svn_config_get_bool($conf_t,
 116                    $SVN::_Core::SVN_CONFIG_SECTION_AUTH,
 117                    $SVN::_Core::SVN_CONFIG_OPTION_STORE_AUTH_CREDS,
 118                    1) == 0) {
 119                        $Git::SVN::Prompt::_no_auth_cache = 1;
 120                }
 121        } # no warnings 'once'
 122        my $self = SVN::Ra->new(url => escape_url($url), auth => $baton,
 123                              config => $config,
 124                              pool => SVN::Pool->new,
 125                              auth_provider_callbacks => $callbacks);
 126        $RA = bless $self, $class;
 127
 128        # Make sure its canonicalized
 129        $self->url($url);
 130        $self->{svn_path} = $url;
 131        $self->{repos_root} = $self->get_repos_root;
 132        $self->{svn_path} =~ s#^\Q$self->{repos_root}\E(/|$)##;
 133        $self->{cache} = { check_path => { r => 0, data => {} },
 134                           get_dir => { r => 0, data => {} } };
 135
 136        return $RA;
 137}
 138
 139sub url {
 140        my $self = shift;
 141
 142        if (@_) {
 143                my $url = shift;
 144                $self->{url} = canonicalize_url($url);
 145                return;
 146        }
 147
 148        return $self->{url};
 149}
 150
 151sub check_path {
 152        my ($self, $path, $r) = @_;
 153        my $cache = $self->{cache}->{check_path};
 154        if ($r == $cache->{r} && exists $cache->{data}->{$path}) {
 155                return $cache->{data}->{$path};
 156        }
 157        my $pool = SVN::Pool->new;
 158        my $t = $self->SUPER::check_path($path, $r, $pool);
 159        $pool->clear;
 160        if ($r != $cache->{r}) {
 161                %{$cache->{data}} = ();
 162                $cache->{r} = $r;
 163        }
 164        $cache->{data}->{$path} = $t;
 165}
 166
 167sub get_dir {
 168        my ($self, $dir, $r) = @_;
 169        my $cache = $self->{cache}->{get_dir};
 170        if ($r == $cache->{r}) {
 171                if (my $x = $cache->{data}->{$dir}) {
 172                        return wantarray ? @$x : $x->[0];
 173                }
 174        }
 175        my $pool = SVN::Pool->new;
 176        my ($d, undef, $props) = $self->SUPER::get_dir($dir, $r, $pool);
 177        my %dirents = map { $_ => { kind => $d->{$_}->kind } } keys %$d;
 178        $pool->clear;
 179        if ($r != $cache->{r}) {
 180                %{$cache->{data}} = ();
 181                $cache->{r} = $r;
 182        }
 183        $cache->{data}->{$dir} = [ \%dirents, $r, $props ];
 184        wantarray ? (\%dirents, $r, $props) : \%dirents;
 185}
 186
 187sub DESTROY {
 188        # do not call the real DESTROY since we store ourselves in $RA
 189}
 190
 191# get_log(paths, start, end, limit,
 192#         discover_changed_paths, strict_node_history, receiver)
 193sub get_log {
 194        my ($self, @args) = @_;
 195        my $pool = SVN::Pool->new;
 196
 197        # svn_log_changed_path_t objects passed to get_log are likely to be
 198        # overwritten even if only the refs are copied to an external variable,
 199        # so we should dup the structures in their entirety.  Using an
 200        # externally passed pool (instead of our temporary and quickly cleared
 201        # pool in Git::SVN::Ra) does not help matters at all...
 202        my $receiver = pop @args;
 203        my $prefix = "/".$self->{svn_path};
 204        $prefix =~ s#/+($)##;
 205        my $prefix_regex = qr#^\Q$prefix\E#;
 206        push(@args, sub {
 207                my ($paths) = $_[0];
 208                return &$receiver(@_) unless $paths;
 209                $_[0] = ();
 210                foreach my $p (keys %$paths) {
 211                        my $i = $paths->{$p};
 212                        # Make path relative to our url, not repos_root
 213                        $p =~ s/$prefix_regex//;
 214                        my %s = map { $_ => $i->$_; }
 215                                qw/copyfrom_path copyfrom_rev action/;
 216                        if ($s{'copyfrom_path'}) {
 217                                $s{'copyfrom_path'} =~ s/$prefix_regex//;
 218                        }
 219                        $_[0]{$p} = \%s;
 220                }
 221                &$receiver(@_);
 222        });
 223
 224
 225        # the limit parameter was not supported in SVN 1.1.x, so we
 226        # drop it.  Therefore, the receiver callback passed to it
 227        # is made aware of this limitation by being wrapped if
 228        # the limit passed to is being wrapped.
 229        if (::compare_svn_version('1.2.0') <= 0) {
 230                my $limit = splice(@args, 3, 1);
 231                if ($limit > 0) {
 232                        my $receiver = pop @args;
 233                        push(@args, sub { &$receiver(@_) if (--$limit >= 0) });
 234                }
 235        }
 236        my $ret = $self->SUPER::get_log(@args, $pool);
 237        $pool->clear;
 238        $ret;
 239}
 240
 241sub trees_match {
 242        my ($self, $url1, $rev1, $url2, $rev2) = @_;
 243        my $ctx = SVN::Client->new(auth => _auth_providers);
 244        my $out = IO::File->new_tmpfile;
 245
 246        # older SVN (1.1.x) doesn't take $pool as the last parameter for
 247        # $ctx->diff(), so we'll create a default one
 248        my $pool = SVN::Pool->new_default_sub;
 249
 250        $ra_invalid = 1; # this will open a new SVN::Ra connection to $url1
 251        $ctx->diff([], $url1, $rev1, $url2, $rev2, 1, 1, 0, $out, $out);
 252        $out->flush;
 253        my $ret = (($out->stat)[7] == 0);
 254        close $out or croak $!;
 255
 256        $ret;
 257}
 258
 259sub get_commit_editor {
 260        my ($self, $log, $cb, $pool) = @_;
 261
 262        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef, 0) : ();
 263        $self->SUPER::get_commit_editor($log, $cb, @lock, $pool);
 264}
 265
 266sub gs_do_update {
 267        my ($self, $rev_a, $rev_b, $gs, $editor) = @_;
 268        my $new = ($rev_a == $rev_b);
 269        my $path = $gs->path;
 270
 271        if ($new && -e $gs->{index}) {
 272                unlink $gs->{index} or die
 273                  "Couldn't unlink index: $gs->{index}: $!\n";
 274        }
 275        my $pool = SVN::Pool->new;
 276        $editor->set_path_strip($path);
 277        my (@pc) = split m#/#, $path;
 278        my $reporter = $self->do_update($rev_b, (@pc ? shift @pc : ''),
 279                                        1, $editor, $pool);
 280        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
 281
 282        # Since we can't rely on svn_ra_reparent being available, we'll
 283        # just have to do some magic with set_path to make it so
 284        # we only want a partial path.
 285        my $sp = '';
 286        my $final = join('/', @pc);
 287        while (@pc) {
 288                $reporter->set_path($sp, $rev_b, 0, @lock, $pool);
 289                $sp .= '/' if length $sp;
 290                $sp .= shift @pc;
 291        }
 292        die "BUG: '$sp' != '$final'\n" if ($sp ne $final);
 293
 294        $reporter->set_path($sp, $rev_a, $new, @lock, $pool);
 295
 296        $reporter->finish_report($pool);
 297        $pool->clear;
 298        $editor->{git_commit_ok};
 299}
 300
 301# this requires SVN 1.4.3 or later (do_switch didn't work before 1.4.3, and
 302# svn_ra_reparent didn't work before 1.4)
 303sub gs_do_switch {
 304        my ($self, $rev_a, $rev_b, $gs, $url_b, $editor) = @_;
 305        my $path = $gs->path;
 306        my $pool = SVN::Pool->new;
 307
 308        my $full_url = $self->url;
 309        my $old_url = $full_url;
 310        $full_url .= '/' . $path if length $path;
 311        my ($ra, $reparented);
 312
 313        if ($old_url =~ m#^svn(\+ssh)?://# ||
 314            ($full_url =~ m#^https?://# &&
 315             escape_url($full_url) ne $full_url)) {
 316                $_[0] = undef;
 317                $self = undef;
 318                $RA = undef;
 319                $ra = Git::SVN::Ra->new($full_url);
 320                $ra_invalid = 1;
 321        } elsif ($old_url ne $full_url) {
 322                SVN::_Ra::svn_ra_reparent($self->{session}, $full_url, $pool);
 323                $self->url($full_url);
 324                $reparented = 1;
 325        }
 326
 327        $ra ||= $self;
 328        $url_b = escape_url($url_b);
 329        my $reporter = $ra->do_switch($rev_b, '', 1, $url_b, $editor, $pool);
 330        my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
 331        $reporter->set_path('', $rev_a, 0, @lock, $pool);
 332        $reporter->finish_report($pool);
 333
 334        if ($reparented) {
 335                SVN::_Ra::svn_ra_reparent($self->{session}, $old_url, $pool);
 336                $self->url($old_url);
 337        }
 338
 339        $pool->clear;
 340        $editor->{git_commit_ok};
 341}
 342
 343sub longest_common_path {
 344        my ($gsv, $globs) = @_;
 345        my %common;
 346        my $common_max = scalar @$gsv;
 347
 348        foreach my $gs (@$gsv) {
 349                my @tmp = split m#/#, $gs->path;
 350                my $p = '';
 351                foreach (@tmp) {
 352                        $p .= length($p) ? "/$_" : $_;
 353                        $common{$p} ||= 0;
 354                        $common{$p}++;
 355                }
 356        }
 357        $globs ||= [];
 358        $common_max += scalar @$globs;
 359        foreach my $glob (@$globs) {
 360                my @tmp = split m#/#, $glob->{path}->{left};
 361                my $p = '';
 362                foreach (@tmp) {
 363                        $p .= length($p) ? "/$_" : $_;
 364                        $common{$p} ||= 0;
 365                        $common{$p}++;
 366                }
 367        }
 368
 369        my $longest_path = '';
 370        foreach (sort {length $b <=> length $a} keys %common) {
 371                if ($common{$_} == $common_max) {
 372                        $longest_path = $_;
 373                        last;
 374                }
 375        }
 376        $longest_path;
 377}
 378
 379sub gs_fetch_loop_common {
 380        my ($self, $base, $head, $gsv, $globs) = @_;
 381        return if ($base > $head);
 382        my $inc = $_log_window_size;
 383        my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
 384        my $longest_path = longest_common_path($gsv, $globs);
 385        my $ra_url = $self->url;
 386        my $find_trailing_edge;
 387        while (1) {
 388                my %revs;
 389                my $err;
 390                my $err_handler = $SVN::Error::handler;
 391                $SVN::Error::handler = sub {
 392                        ($err) = @_;
 393                        skip_unknown_revs($err);
 394                };
 395                sub _cb {
 396                        my ($paths, $r, $author, $date, $log) = @_;
 397                        [ $paths,
 398                          { author => $author, date => $date, log => $log } ];
 399                }
 400                $self->get_log([$longest_path], $min, $max, 0, 1, 1,
 401                               sub { $revs{$_[1]} = _cb(@_) });
 402                if ($err) {
 403                        print "Checked through r$max\r";
 404                } else {
 405                        $find_trailing_edge = 1;
 406                }
 407                if ($err and $find_trailing_edge) {
 408                        print STDERR "Path '$longest_path' ",
 409                                     "was probably deleted:\n",
 410                                     $err->expanded_message,
 411                                     "\nWill attempt to follow ",
 412                                     "revisions r$min .. r$max ",
 413                                     "committed before the deletion\n";
 414                        my $hi = $max;
 415                        while (--$hi >= $min) {
 416                                my $ok;
 417                                $self->get_log([$longest_path], $min, $hi,
 418                                               0, 1, 1, sub {
 419                                               $ok = $_[1];
 420                                               $revs{$_[1]} = _cb(@_) });
 421                                if ($ok) {
 422                                        print STDERR "r$min .. r$ok OK\n";
 423                                        last;
 424                                }
 425                        }
 426                        $find_trailing_edge = 0;
 427                }
 428                $SVN::Error::handler = $err_handler;
 429
 430                my %exists = map { $_->{path} => $_ } @$gsv;
 431                foreach my $r (sort {$a <=> $b} keys %revs) {
 432                        my ($paths, $logged) = @{$revs{$r}};
 433
 434                        foreach my $gs ($self->match_globs(\%exists, $paths,
 435                                                           $globs, $r)) {
 436                                if ($gs->rev_map_max >= $r) {
 437                                        next;
 438                                }
 439                                next unless $gs->match_paths($paths, $r);
 440                                $gs->{logged_rev_props} = $logged;
 441                                if (my $last_commit = $gs->last_commit) {
 442                                        $gs->assert_index_clean($last_commit);
 443                                }
 444                                my $log_entry = $gs->do_fetch($paths, $r);
 445                                if ($log_entry) {
 446                                        $gs->do_git_commit($log_entry);
 447                                }
 448                                $Git::SVN::INDEX_FILES{$gs->{index}} = 1;
 449                        }
 450                        foreach my $g (@$globs) {
 451                                my $k = "svn-remote.$g->{remote}." .
 452                                        "$g->{t}-maxRev";
 453                                Git::SVN::tmp_config($k, $r);
 454                        }
 455                        if ($ra_invalid) {
 456                                $_[0] = undef;
 457                                $self = undef;
 458                                $RA = undef;
 459                                $self = Git::SVN::Ra->new($ra_url);
 460                                $ra_invalid = undef;
 461                        }
 462                }
 463                # pre-fill the .rev_db since it'll eventually get filled in
 464                # with '0' x40 if something new gets committed
 465                foreach my $gs (@$gsv) {
 466                        next if $gs->rev_map_max >= $max;
 467                        next if defined $gs->rev_map_get($max);
 468                        $gs->rev_map_set($max, 0 x40);
 469                }
 470                foreach my $g (@$globs) {
 471                        my $k = "svn-remote.$g->{remote}.$g->{t}-maxRev";
 472                        Git::SVN::tmp_config($k, $max);
 473                }
 474                last if $max >= $head;
 475                $min = $max + 1;
 476                $max += $inc;
 477                $max = $head if ($max > $head);
 478        }
 479        Git::SVN::gc();
 480}
 481
 482sub get_dir_globbed {
 483        my ($self, $left, $depth, $r) = @_;
 484
 485        my @x = eval { $self->get_dir($left, $r) };
 486        return unless scalar @x == 3;
 487        my $dirents = $x[0];
 488        my @finalents;
 489        foreach my $de (keys %$dirents) {
 490                next if $dirents->{$de}->{kind} != $SVN::Node::dir;
 491                if ($depth > 1) {
 492                        my @args = ("$left/$de", $depth - 1, $r);
 493                        foreach my $dir ($self->get_dir_globbed(@args)) {
 494                                push @finalents, "$de/$dir";
 495                        }
 496                } else {
 497                        push @finalents, $de;
 498                }
 499        }
 500        @finalents;
 501}
 502
 503# return value: 0 -- don't ignore, 1 -- ignore
 504sub is_ref_ignored {
 505        my ($g, $p) = @_;
 506        my $refname = $g->{ref}->full_path($p);
 507        return 1 if defined($g->{ignore_refs_regex}) &&
 508                    $refname =~ m!$g->{ignore_refs_regex}!;
 509        return 0 unless defined($_ignore_refs_regex);
 510        return 1 if $refname =~ m!$_ignore_refs_regex!o;
 511        return 0;
 512}
 513
 514sub match_globs {
 515        my ($self, $exists, $paths, $globs, $r) = @_;
 516
 517        sub get_dir_check {
 518                my ($self, $exists, $g, $r) = @_;
 519
 520                my @dirs = $self->get_dir_globbed($g->{path}->{left},
 521                                                  $g->{path}->{depth},
 522                                                  $r);
 523
 524                foreach my $de (@dirs) {
 525                        my $p = $g->{path}->full_path($de);
 526                        next if $exists->{$p};
 527                        next if (length $g->{path}->{right} &&
 528                                 ($self->check_path($p, $r) !=
 529                                  $SVN::Node::dir));
 530                        next unless $p =~ /$g->{path}->{regex}/;
 531                        $exists->{$p} = Git::SVN->init($self->url, $p, undef,
 532                                         $g->{ref}->full_path($de), 1);
 533                }
 534        }
 535        foreach my $g (@$globs) {
 536                if (my $path = $paths->{"/$g->{path}->{left}"}) {
 537                        if ($path->{action} =~ /^[AR]$/) {
 538                                get_dir_check($self, $exists, $g, $r);
 539                        }
 540                }
 541                foreach (keys %$paths) {
 542                        if (/$g->{path}->{left_regex}/ &&
 543                            !/$g->{path}->{regex}/) {
 544                                next if $paths->{$_}->{action} !~ /^[AR]$/;
 545                                get_dir_check($self, $exists, $g, $r);
 546                        }
 547                        next unless /$g->{path}->{regex}/;
 548                        my $p = $1;
 549                        my $pathname = $g->{path}->full_path($p);
 550                        next if is_ref_ignored($g, $p);
 551                        next if $exists->{$pathname};
 552                        next if ($self->check_path($pathname, $r) !=
 553                                 $SVN::Node::dir);
 554                        $exists->{$pathname} = Git::SVN->init(
 555                                              $self->url, $pathname, undef,
 556                                              $g->{ref}->full_path($p), 1);
 557                }
 558                my $c = '';
 559                foreach (split m#/#, $g->{path}->{left}) {
 560                        $c .= "/$_";
 561                        next unless ($paths->{$c} &&
 562                                     ($paths->{$c}->{action} =~ /^[AR]$/));
 563                        get_dir_check($self, $exists, $g, $r);
 564                }
 565        }
 566        values %$exists;
 567}
 568
 569sub minimize_url {
 570        my ($self) = @_;
 571        return $self->url if ($self->url eq $self->{repos_root});
 572        my $url = $self->{repos_root};
 573        my @components = split(m!/!, $self->{svn_path});
 574        my $c = '';
 575        do {
 576                $url .= "/$c" if length $c;
 577                eval {
 578                        my $ra = (ref $self)->new($url);
 579                        my $latest = $ra->get_latest_revnum;
 580                        $ra->get_log("", $latest, 0, 1, 0, 1, sub {});
 581                };
 582        } while ($@ && ($c = shift @components));
 583        $url;
 584}
 585
 586sub can_do_switch {
 587        my $self = shift;
 588        unless (defined $can_do_switch) {
 589                my $pool = SVN::Pool->new;
 590                my $rep = eval {
 591                        $self->do_switch(1, '', 0, $self->url,
 592                                         SVN::Delta::Editor->new, $pool);
 593                };
 594                if ($@) {
 595                        $can_do_switch = 0;
 596                } else {
 597                        $rep->abort_report($pool);
 598                        $can_do_switch = 1;
 599                }
 600                $pool->clear;
 601        }
 602        $can_do_switch;
 603}
 604
 605sub skip_unknown_revs {
 606        my ($err) = @_;
 607        my $errno = $err->apr_err();
 608        # Maybe the branch we're tracking didn't
 609        # exist when the repo started, so it's
 610        # not an error if it doesn't, just continue
 611        #
 612        # Wonderfully consistent library, eh?
 613        # 160013 - svn:// and file://
 614        # 175002 - http(s)://
 615        # 175007 - http(s):// (this repo required authorization, too...)
 616        #   More codes may be discovered later...
 617        if ($errno == 175007 || $errno == 175002 || $errno == 160013) {
 618                my $err_key = $err->expanded_message;
 619                # revision numbers change every time, filter them out
 620                $err_key =~ s/\d+/\0/g;
 621                $err_key = "$errno\0$err_key";
 622                unless ($ignored_err{$err_key}) {
 623                        warn "W: Ignoring error from SVN, path probably ",
 624                             "does not exist: ($errno): ",
 625                             $err->expanded_message,"\n";
 626                        warn "W: Do not be alarmed at the above message ",
 627                             "git-svn is just searching aggressively for ",
 628                             "old history.\n",
 629                             "This may take a while on large repositories\n";
 630                        $ignored_err{$err_key} = 1;
 631                }
 632                return;
 633        }
 634        die "Error from SVN, ($errno): ", $err->expanded_message,"\n";
 635}
 636
 6371;
 638__END__
 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.