Andrew's git / gitweb.git / perl/Git/SVN/Ra.pm
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perl / Git / SVN / Ra.pmon commit Git 1.8.4.4 (becb433)
   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
  35sub _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
  72sub 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
 124sub url {
 125        my $self = shift;
 126
 127        if (@_) {
 128                my $url = shift;
 129                $self->{url} = canonicalize_url($url);
 130                return;
 131        }
 132
 133        return $self->{url};
 134}
 135
 136sub check_path {
 137        my ($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} = $t;
 150}
 151
 152sub get_dir {
 153        my ($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
 172sub DESTROY {
 173        # do not call the real DESTROY since we store ourselves in $RA
 174}
 175
 176# get_log(paths, start, end, limit,
 177#         discover_changed_paths, strict_node_history, receiver)
 178sub get_log {
 179        my ($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        $ret;
 225}
 226
 227sub trees_match {
 228        my ($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        $ret;
 243}
 244
 245sub get_commit_editor {
 246        my ($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, $pool);
 250}
 251
 252sub gs_do_update {
 253        my ($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        $editor->{git_commit_ok};
 285}
 286
 287# this requires SVN 1.4.3 or later (do_switch didn't work before 1.4.3, and
 288# svn_ra_reparent didn't work before 1.4)
 289sub gs_do_switch {
 290        my ($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(\+\w+)?://# ||
 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        $editor->{git_commit_ok};
 330}
 331
 332sub longest_common_path {
 333        my ($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        $longest_path;
 366}
 367
 368sub gs_fetch_loop_common {
 369        my ($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 > $head);
 467        }
 468        Git::SVN::gc();
 469}
 470
 471sub get_dir_globbed {
 472        my ($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, $de;
 487                }
 488        }
 489        @finalents;
 490}
 491
 492# return value: 0 -- don't ignore, 1 -- ignore
 493sub is_ref_ignored {
 494        my ($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
 503sub 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
 558sub 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
 576sub 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        $can_do_switch;
 593}
 594
 595sub skip_unknown_revs {
 596        my ($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
 6271;
 628__END__
 629
 630=head1 NAME
 631
 632Git::SVN::Ra - Subversion remote access functions for git-svn
 633
 634=head1 SYNOPSIS
 635
 636    use Git::SVN::Ra;
 637
 638    my $ra = Git::SVN::Ra->new($branchurl);
 639    my ($dirents, $fetched_revnum, $props) =
 640        $ra->get_dir('.', $SVN::Core::INVALID_REVNUM);
 641
 642=head1 DESCRIPTION
 643
 644This is a wrapper around the L<SVN::Ra> module for use by B<git-svn>.
 645It fills in some default parameters (such as the authentication
 646scheme), smooths over incompatibilities between libsvn versions, adds
 647caching, and implements some functions specific to B<git-svn>.
 648
 649Do not use it unless you are developing git-svn.  The interface will
 650change as git-svn evolves.
 651
 652=head1 DEPENDENCIES
 653
 654Subversion perl bindings,
 655L<Git::SVN>.
 656
 657C<Git::SVN::Ra> has not been tested using callers other than
 658B<git-svn> itself.
 659
 660=head1 SEE ALSO
 661
 662L<SVN::Ra>.
 663
 664=head1 INCOMPATIBILITIES
 665
 666None reported.
 667
 668=head1 BUGS
 669
 670None.