git.oblomov.eu Git - git/blob - git-svnimport.perl

   1 #!/usr/bin/perl -w
   2
   3 # This tool is copyright (c) 2005, Matthias Urlichs.
   4 # It is released under the Gnu Public License, version 2.
   5 #
   6 # The basic idea is to pull and analyze SVN changes.
   7 #
   8 # Checking out the files is done by a single long-running SVN connection.
   9 #
  10 # The head revision is on branch "origin" by default.
  11 # You can change that with the '-o' option.
  12
  13 use strict;
  14 use warnings;
  15 use Getopt::Std;
  16 use File::Spec;
  17 use File::Temp qw(tempfile);
  18 use File::Path qw(mkpath);
  19 use File::Basename qw(basename dirname);
  20 use Time::Local;
  21 use IO::Pipe;
  22 use POSIX qw(strftime dup2);
  23 use IPC::Open2;
  24 use SVN::Core;
  25 use SVN::Ra;
  26
  27 die "Need SVN:Core 1.2.1 or better" if $SVN::Core::VERSION lt "1.2.1";
  28
  29 $SIG{'PIPE'}="IGNORE";
  30 $ENV{'TZ'}="UTC";
  31
  32 our($opt_h,$opt_o,$opt_v,$opt_u,$opt_C,$opt_i,$opt_m,$opt_M,$opt_t,$opt_T,$opt_b,$opt_r,$opt_s,$opt_l,$opt_d,$opt_D);
  33
  34 sub usage() {
  35         print STDERR <<END;
  36 Usage: ${\basename $0}     # fetch/update GIT from SVN
  37        [-o branch-for-HEAD] [-h] [-v] [-l max_rev]
  38        [-C GIT_repository] [-t tagname] [-T trunkname] [-b branchname]
  39        [-d|-D] [-i] [-u] [-r] [-s start_chg] [-m] [-M regex] [SVN_URL]
  40 END
  41         exit(1);
  42 }
  43
  44 getopts("b:C:dDhil:mM:o:rs:t:T:uv") or usage();
  45 usage if $opt_h;
  46
  47 my $tag_name = $opt_t || "tags";
  48 my $trunk_name = $opt_T || "trunk";
  49 my $branch_name = $opt_b || "branches";
  50
  51 @ARGV == 1 or @ARGV == 2 or usage();
  52
  53 $opt_o ||= "origin";
  54 $opt_s ||= 1;
  55 my $git_tree = $opt_C;
  56 $git_tree ||= ".";
  57
  58 my $svn_url = $ARGV[0];
  59 my $svn_dir = $ARGV[1];
  60
  61 our @mergerx = ();
  62 if ($opt_m) {
  63         @mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
  64 }
  65 if ($opt_M) {
  66         push (@mergerx, qr/$opt_M/);
  67 }
  68
  69 select(STDERR); $|=1; select(STDOUT);
  70
  71
  72 package SVNconn;
  73 # Basic SVN connection.
  74 # We're only interested in connecting and downloading, so ...
  75
  76 use File::Spec;
  77 use File::Temp qw(tempfile);
  78 use POSIX qw(strftime dup2);
  79
  80 sub new {
  81         my($what,$repo) = @_;
  82         $what=ref($what) if ref($what);
  83
  84         my $self = {};
  85         $self->{'buffer'} = "";
  86         bless($self,$what);
  87
  88         $repo =~ s#/+$##;
  89         $self->{'fullrep'} = $repo;
  90         $self->conn();
  91
  92         return $self;
  93 }
  94
  95 sub conn {
  96         my $self = shift;
  97         my $repo = $self->{'fullrep'};
  98         my $auth = SVN::Core::auth_open ([SVN::Client::get_simple_provider,
  99                           SVN::Client::get_ssl_server_trust_file_provider,
 100                           SVN::Client::get_username_provider]);
 101         my $s = SVN::Ra->new(url => $repo, auth => $auth);
 102         die "SVN connection to $repo: $!\n" unless defined $s;
 103         $self->{'svn'} = $s;
 104         $self->{'repo'} = $repo;
 105         $self->{'maxrev'} = $s->get_latest_revnum();
 106 }
 107
 108 sub file {
 109         my($self,$path,$rev) = @_;
 110
 111         my ($fh, $name) = tempfile('gitsvn.XXXXXX',
 112                     DIR => File::Spec->tmpdir(), UNLINK => 1);
 113
 114         print "... $rev $path ...\n" if $opt_v;
 115         my $pool = SVN::Pool->new();
 116         eval { $self->{'svn'}->get_file($path,$rev,$fh,$pool); };
 117         $pool->clear;
 118         if($@) {
 119                 return undef if $@ =~ /Attempted to get checksum/;
 120                 die $@;
 121         }
 122         close ($fh);
 123
 124         return $name;
 125 }
 126
 127 package main;
 128 use URI;
 129
 130 our $svn = $svn_url;
 131 $svn .= "/$svn_dir" if defined $svn_dir;
 132 my $svn2 = SVNconn->new($svn);
 133 $svn = SVNconn->new($svn);
 134
 135 my $lwp_ua;
 136 if($opt_d or $opt_D) {
 137         $svn_url = URI->new($svn_url)->canonical;
 138         if($opt_D) {
 139                 $svn_dir =~ s#/*$#/#;
 140         } else {
 141                 $svn_dir = "";
 142         }
 143         if ($svn_url->scheme eq "http") {
 144                 use LWP::UserAgent;
 145                 $lwp_ua = LWP::UserAgent->new(keep_alive => 1, requests_redirectable => []);
 146         } else {
 147                 print STDERR "Warning: not HTTP; turning off direct file access\n";
 148                 $opt_d=0;
 149         }
 150 }
 151
 152 sub pdate($) {
 153         my($d) = @_;
 154         $d =~ m#(\d\d\d\d)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)#
 155                 or die "Unparseable date: $d\n";
 156         my $y=$1; $y-=1900 if $y>1900;
 157         return timegm($6||0,$5,$4,$3,$2-1,$y);
 158 }
 159
 160 sub getwd() {
 161         my $pwd = `pwd`;
 162         chomp $pwd;
 163         return $pwd;
 164 }
 165
 166
 167 sub get_headref($$) {
 168     my $name    = shift;
 169     my $git_dir = shift;
 170     my $sha;
 171
 172     if (open(C,"$git_dir/refs/heads/$name")) {
 173         chomp($sha = <C>);
 174         close(C);
 175         length($sha) == 40
 176             or die "Cannot get head id for $name ($sha): $!\n";
 177     }
 178     return $sha;
 179 }
 180
 181
 182 -d $git_tree
 183         or mkdir($git_tree,0777)
 184         or die "Could not create $git_tree: $!";
 185 chdir($git_tree);
 186
 187 my $orig_branch = "";
 188 my $forward_master = 0;
 189 my %branches;
 190
 191 my $git_dir = $ENV{"GIT_DIR"} || ".git";
 192 $git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
 193 $ENV{"GIT_DIR"} = $git_dir;
 194 my $orig_git_index;
 195 $orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
 196 my ($git_ih, $git_index) = tempfile('gitXXXXXX', SUFFIX => '.idx',
 197                                     DIR => File::Spec->tmpdir());
 198 close ($git_ih);
 199 $ENV{GIT_INDEX_FILE} = $git_index;
 200 my $maxnum = 0;
 201 my $last_rev = "";
 202 my $last_branch;
 203 my $current_rev = $opt_s || 1;
 204 unless(-d $git_dir) {
 205         system("git-init-db");
 206         die "Cannot init the GIT db at $git_tree: $?\n" if $?;
 207         system("git-read-tree");
 208         die "Cannot init an empty tree: $?\n" if $?;
 209
 210         $last_branch = $opt_o;
 211         $orig_branch = "";
 212 } else {
 213         -f "$git_dir/refs/heads/$opt_o"
 214                 or die "Branch '$opt_o' does not exist.\n".
 215                        "Either use the correct '-o branch' option,\n".
 216                        "or import to a new repository.\n";
 217
 218         -f "$git_dir/svn2git"
 219                 or die "'$git_dir/svn2git' does not exist.\n".
 220                        "You need that file for incremental imports.\n";
 221         open(F, "git-symbolic-ref HEAD |") or
 222                 die "Cannot run git-symbolic-ref: $!\n";
 223         chomp ($last_branch = <F>);
 224         $last_branch = basename($last_branch);
 225         close(F);
 226         unless($last_branch) {
 227                 warn "Cannot read the last branch name: $! -- assuming 'master'\n";
 228                 $last_branch = "master";
 229         }
 230         $orig_branch = $last_branch;
 231         $last_rev = get_headref($orig_branch, $git_dir);
 232         if (-f "$git_dir/SVN2GIT_HEAD") {
 233                 die <<EOM;
 234 SVN2GIT_HEAD exists.
 235 Make sure your working directory corresponds to HEAD and remove SVN2GIT_HEAD.
 236 You may need to run
 237
 238     git-read-tree -m -u SVN2GIT_HEAD HEAD
 239 EOM
 240         }
 241         system('cp', "$git_dir/HEAD", "$git_dir/SVN2GIT_HEAD");
 242
 243         $forward_master =
 244             $opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
 245             system('cmp', '-s', "$git_dir/refs/heads/master",
 246                                 "$git_dir/refs/heads/$opt_o") == 0;
 247
 248         # populate index
 249         system('git-read-tree', $last_rev);
 250         die "read-tree failed: $?\n" if $?;
 251
 252         # Get the last import timestamps
 253         open my $B,"<", "$git_dir/svn2git";
 254         while(<$B>) {
 255                 chomp;
 256                 my($num,$branch,$ref) = split;
 257                 $branches{$branch}{$num} = $ref;
 258                 $branches{$branch}{"LAST"} = $ref;
 259                 $current_rev = $num+1 if $current_rev <= $num;
 260         }
 261         close($B);
 262 }
 263 -d $git_dir
 264         or die "Could not create git subdir ($git_dir).\n";
 265
 266 open BRANCHES,">>", "$git_dir/svn2git";
 267
 268 sub node_kind($$$) {
 269         my ($branch, $path, $revision) = @_;
 270         my $pool=SVN::Pool->new;
 271         my $kind = $svn->{'svn'}->check_path(revert_split_path($branch,$path),$revision,$pool);
 272         $pool->clear;
 273         return $kind;
 274 }
 275
 276 sub revert_split_path($$) {
 277         my($branch,$path) = @_;
 278
 279         my $svnpath;
 280         $path = "" if $path eq "/"; # this should not happen, but ...
 281         if($branch eq "/") {
 282                 $svnpath = "$trunk_name/$path";
 283         } elsif($branch =~ m#^/#) {
 284                 $svnpath = "$tag_name$branch/$path";
 285         } else {
 286                 $svnpath = "$branch_name/$branch/$path";
 287         }
 288
 289         $svnpath =~ s#/+$##;
 290         return $svnpath;
 291 }
 292
 293 sub get_file($$$) {
 294         my($rev,$branch,$path) = @_;
 295
 296         my $svnpath = revert_split_path($branch,$path);
 297
 298         # now get it
 299         my $name;
 300         if($opt_d) {
 301                 my($req,$res);
 302
 303                 # /svn/!svn/bc/2/django/trunk/django-docs/build.py
 304                 my $url=$svn_url->clone();
 305                 $url->path($url->path."/!svn/bc/$rev/$svn_dir$svnpath");
 306                 print "... $path...\n" if $opt_v;
 307                 $req = HTTP::Request->new(GET => $url);
 308                 $res = $lwp_ua->request($req);
 309                 if ($res->is_success) {
 310                         my $fh;
 311                         ($fh, $name) = tempfile('gitsvn.XXXXXX',
 312                         DIR => File::Spec->tmpdir(), UNLINK => 1);
 313                         print $fh $res->content;
 314                         close($fh) or die "Could not write $name: $!\n";
 315                 } else {
 316                         return undef if $res->code == 301; # directory?
 317                         die $res->status_line." at $url\n";
 318                 }
 319         } else {
 320                 $name = $svn->file("$svnpath",$rev);
 321                 return undef unless defined $name;
 322         }
 323
 324         my $pid = open(my $F, '-|');
 325         die $! unless defined $pid;
 326         if (!$pid) {
 327             exec("git-hash-object", "-w", $name)
 328                 or die "Cannot create object: $!\n";
 329         }
 330         my $sha = <$F>;
 331         chomp $sha;
 332         close $F;
 333         unlink $name;
 334         my $mode = "0644"; # SV does not seem to store any file modes
 335         return [$mode, $sha, $path];
 336 }
 337
 338 sub split_path($$) {
 339         my($rev,$path) = @_;
 340         my $branch;
 341
 342         if($path =~ s#^/\Q$tag_name\E/([^/]+)/?##) {
 343                 $branch = "/$1";
 344         } elsif($path =~ s#^/\Q$trunk_name\E/?##) {
 345                 $branch = "/";
 346         } elsif($path =~ s#^/\Q$branch_name\E/([^/]+)/?##) {
 347                 $branch = $1;
 348         } else {
 349                 my %no_error = (
 350                         "/" => 1,
 351                         "/$tag_name" => 1,
 352                         "/$branch_name" => 1
 353                 );
 354                 print STDERR "$rev: Unrecognized path: $path\n" unless (defined $no_error{$path});
 355                 return ()
 356         }
 357         $path = "/" if $path eq "";
 358         return ($branch,$path);
 359 }
 360
 361 sub branch_rev($$) {
 362
 363         my ($srcbranch,$uptorev) = @_;
 364
 365         my $bbranches = $branches{$srcbranch};
 366         my @revs = reverse sort { ($a eq 'LAST' ? 0 : $a) <=> ($b eq 'LAST' ? 0 : $b) } keys %$bbranches;
 367         my $therev;
 368         foreach my $arev(@revs) {
 369                 next if  ($arev eq 'LAST');
 370                 if ($arev <= $uptorev) {
 371                         $therev = $arev;
 372                         last;
 373                 }
 374         }
 375         return $therev;
 376 }
 377
 378 sub copy_path($$$$$$$$) {
 379         # Somebody copied a whole subdirectory.
 380         # We need to find the index entries from the old version which the
 381         # SVN log entry points to, and add them to the new place.
 382
 383         my($newrev,$newbranch,$path,$oldpath,$rev,$node_kind,$new,$parents) = @_;
 384
 385         my($srcbranch,$srcpath) = split_path($rev,$oldpath);
 386         unless(defined $srcbranch) {
 387                 print "Path not found when copying from $oldpath @ $rev\n";
 388                 return;
 389         }
 390         my $therev = branch_rev($srcbranch, $rev);
 391         my $gitrev = $branches{$srcbranch}{$therev};
 392         unless($gitrev) {
 393                 print STDERR "$newrev:$newbranch: could not find $oldpath \@ $rev\n";
 394                 return;
 395         }
 396         if ($srcbranch ne $newbranch) {
 397                 push(@$parents, $branches{$srcbranch}{'LAST'});
 398         }
 399         print "$newrev:$newbranch:$path: copying from $srcbranch:$srcpath @ $rev\n" if $opt_v;
 400         if ($node_kind eq $SVN::Node::dir) {
 401                         $srcpath =~ s#/*$#/#;
 402         }
 403
 404         my $pid = open my $f,'-|';
 405         die $! unless defined $pid;
 406         if (!$pid) {
 407                 exec("git-ls-tree","-r","-z",$gitrev,$srcpath)
 408                         or die $!;
 409         }
 410         local $/ = "\0";
 411         while(<$f>) {
 412                 chomp;
 413                 my($m,$p) = split(/\t/,$_,2);
 414                 my($mode,$type,$sha1) = split(/ /,$m);
 415                 next if $type ne "blob";
 416                 if ($node_kind eq $SVN::Node::dir) {
 417                         $p = $path . substr($p,length($srcpath)-1);
 418                 } else {
 419                         $p = $path;
 420                 }
 421                 push(@$new,[$mode,$sha1,$p]);
 422         }
 423         close($f) or
 424                 print STDERR "$newrev:$newbranch: could not list files in $oldpath \@ $rev\n";
 425 }
 426
 427 sub commit {
 428         my($branch, $changed_paths, $revision, $author, $date, $message) = @_;
 429         my($author_name,$author_email,$dest);
 430         my(@old,@new,@parents);
 431
 432         if (not defined $author) {
 433                 $author_name = $author_email = "unknown";
 434         } elsif ($author =~ /^(.*?)\s+<(.*)>$/) {
 435                 ($author_name, $author_email) = ($1, $2);
 436         } else {
 437                 $author =~ s/^<(.*)>$/$1/;
 438                 $author_name = $author_email = $author;
 439         }
 440         $date = pdate($date);
 441
 442         my $tag;
 443         my $parent;
 444         if($branch eq "/") { # trunk
 445                 $parent = $opt_o;
 446         } elsif($branch =~ m#^/(.+)#) { # tag
 447                 $tag = 1;
 448                 $parent = $1;
 449         } else { # "normal" branch
 450                 # nothing to do
 451                 $parent = $branch;
 452         }
 453         $dest = $parent;
 454
 455         my $prev = $changed_paths->{"/"};
 456         if($prev and $prev->[0] eq "A") {
 457                 delete $changed_paths->{"/"};
 458                 my $oldpath = $prev->[1];
 459                 my $rev;
 460                 if(defined $oldpath) {
 461                         my $p;
 462                         ($parent,$p) = split_path($revision,$oldpath);
 463                         if($parent eq "/") {
 464                                 $parent = $opt_o;
 465                         } else {
 466                                 $parent =~ s#^/##; # if it's a tag
 467                         }
 468                 } else {
 469                         $parent = undef;
 470                 }
 471         }
 472
 473         my $rev;
 474         if($revision > $opt_s and defined $parent) {
 475                 open(H,"git-rev-parse --verify $parent |");
 476                 $rev = <H>;
 477                 close(H) or do {
 478                         print STDERR "$revision: cannot find commit '$parent'!\n";
 479                         return;
 480                 };
 481                 chop $rev;
 482                 if(length($rev) != 40) {
 483                         print STDERR "$revision: cannot find commit '$parent'!\n";
 484                         return;
 485                 }
 486                 $rev = $branches{($parent eq $opt_o) ? "/" : $parent}{"LAST"};
 487                 if($revision != $opt_s and not $rev) {
 488                         print STDERR "$revision: do not know ancestor for '$parent'!\n";
 489                         return;
 490                 }
 491         } else {
 492                 $rev = undef;
 493         }
 494
 495 #       if($prev and $prev->[0] eq "A") {
 496 #               if(not $tag) {
 497 #                       unless(open(H,"> $git_dir/refs/heads/$branch")) {
 498 #                               print STDERR "$revision: Could not create branch $branch: $!\n";
 499 #                               $state=11;
 500 #                               next;
 501 #                       }
 502 #                       print H "$rev\n"
 503 #                               or die "Could not write branch $branch: $!";
 504 #                       close(H)
 505 #                               or die "Could not write branch $branch: $!";
 506 #               }
 507 #       }
 508         if(not defined $rev) {
 509                 unlink($git_index);
 510         } elsif ($rev ne $last_rev) {
 511                 print "Switching from $last_rev to $rev ($branch)\n" if $opt_v;
 512                 system("git-read-tree", $rev);
 513                 die "read-tree failed for $rev: $?\n" if $?;
 514                 $last_rev = $rev;
 515         }
 516
 517         push (@parents, $rev) if defined $rev;
 518
 519         my $cid;
 520         if($tag and not %$changed_paths) {
 521                 $cid = $rev;
 522         } else {
 523                 my @paths = sort keys %$changed_paths;
 524                 foreach my $path(@paths) {
 525                         my $action = $changed_paths->{$path};
 526
 527                         if ($action->[0] eq "R") {
 528                                 # refer to a file/tree in an earlier commit
 529                                 push(@old,$path); # remove any old stuff
 530                         }
 531                         if(($action->[0] eq "A") || ($action->[0] eq "R")) {
 532                                 my $node_kind = node_kind($branch,$path,$revision);
 533                                 if($action->[1]) {
 534                                         copy_path($revision,$branch,$path,$action->[1],$action->[2],$node_kind,\@new,\@parents);
 535                                 } elsif ($node_kind eq $SVN::Node::file) {
 536                                         my $f = get_file($revision,$branch,$path);
 537                                         if ($f) {
 538                                                 push(@new,$f) if $f;
 539                                         } else {
 540                                                 my $opath = $action->[3];
 541                                                 print STDERR "$revision: $branch: could not fetch '$opath'\n";
 542                                         }
 543                                 }
 544                         } elsif ($action->[0] eq "D") {
 545                                 push(@old,$path);
 546                         } elsif ($action->[0] eq "M") {
 547                                 my $node_kind = node_kind($branch,$path,$revision);
 548                                 if ($node_kind eq $SVN::Node::file) {
 549                                         my $f = get_file($revision,$branch,$path);
 550                                         push(@new,$f) if $f;
 551                                 }
 552                         } else {
 553                                 die "$revision: unknown action '".$action->[0]."' for $path\n";
 554                         }
 555                 }
 556
 557                 while(@old) {
 558                         my @o1;
 559                         if(@old > 55) {
 560                                 @o1 = splice(@old,0,50);
 561                         } else {
 562                                 @o1 = @old;
 563                                 @old = ();
 564                         }
 565                         my $pid = open my $F, "-|";
 566                         die "$!" unless defined $pid;
 567                         if (!$pid) {
 568                                 exec("git-ls-files", "-z", @o1) or die $!;
 569                         }
 570                         @o1 = ();
 571                         local $/ = "\0";
 572                         while(<$F>) {
 573                                 chomp;
 574                                 push(@o1,$_);
 575                         }
 576                         close($F);
 577
 578                         while(@o1) {
 579                                 my @o2;
 580                                 if(@o1 > 55) {
 581                                         @o2 = splice(@o1,0,50);
 582                                 } else {
 583                                         @o2 = @o1;
 584                                         @o1 = ();
 585                                 }
 586                                 system("git-update-index","--force-remove","--",@o2);
 587                                 die "Cannot remove files: $?\n" if $?;
 588                         }
 589                 }
 590                 while(@new) {
 591                         my @n2;
 592                         if(@new > 12) {
 593                                 @n2 = splice(@new,0,10);
 594                         } else {
 595                                 @n2 = @new;
 596                                 @new = ();
 597                         }
 598                         system("git-update-index","--add",
 599                                 (map { ('--cacheinfo', @$_) } @n2));
 600                         die "Cannot add files: $?\n" if $?;
 601                 }
 602
 603                 my $pid = open(C,"-|");
 604                 die "Cannot fork: $!" unless defined $pid;
 605                 unless($pid) {
 606                         exec("git-write-tree");
 607                         die "Cannot exec git-write-tree: $!\n";
 608                 }
 609                 chomp(my $tree = <C>);
 610                 length($tree) == 40
 611                         or die "Cannot get tree id ($tree): $!\n";
 612                 close(C)
 613                         or die "Error running git-write-tree: $?\n";
 614                 print "Tree ID $tree\n" if $opt_v;
 615
 616                 my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 617                 my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 618                 $pid = fork();
 619                 die "Fork: $!\n" unless defined $pid;
 620                 unless($pid) {
 621                         $pr->writer();
 622                         $pw->reader();
 623                         open(OUT,">&STDOUT");
 624                         dup2($pw->fileno(),0);
 625                         dup2($pr->fileno(),1);
 626                         $pr->close();
 627                         $pw->close();
 628
 629                         my @par = ();
 630
 631                         # loose detection of merges
 632                         # based on the commit msg
 633                         foreach my $rx (@mergerx) {
 634                                 if ($message =~ $rx) {
 635                                         my $mparent = $1;
 636                                         if ($mparent eq 'HEAD') { $mparent = $opt_o };
 637                                         if ( -e "$git_dir/refs/heads/$mparent") {
 638                                                 $mparent = get_headref($mparent, $git_dir);
 639                                                 push (@parents, $mparent);
 640                                                 print OUT "Merge parent branch: $mparent\n" if $opt_v;
 641                                         }
 642                                 }
 643                         }
 644                         my %seen_parents = ();
 645                         my @unique_parents = grep { ! $seen_parents{$_} ++ } @parents;
 646                         foreach my $bparent (@unique_parents) {
 647                                 push @par, '-p', $bparent;
 648                                 print OUT "Merge parent branch: $bparent\n" if $opt_v;
 649                         }
 650
 651                         exec("env",
 652                                 "GIT_AUTHOR_NAME=$author_name",
 653                                 "GIT_AUTHOR_EMAIL=$author_email",
 654                                 "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 655                                 "GIT_COMMITTER_NAME=$author_name",
 656                                 "GIT_COMMITTER_EMAIL=$author_email",
 657                                 "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 658                                 "git-commit-tree", $tree,@par);
 659                         die "Cannot exec git-commit-tree: $!\n";
 660                 }
 661                 $pw->writer();
 662                 $pr->reader();
 663
 664                 $message =~ s/[\s\n]+\z//;
 665                 $message = "r$revision: $message" if $opt_r;
 666
 667                 print $pw "$message\n"
 668                         or die "Error writing to git-commit-tree: $!\n";
 669                 $pw->close();
 670
 671                 print "Committed change $revision:$branch ".strftime("%Y-%m-%d %H:%M:%S",gmtime($date)).")\n" if $opt_v;
 672                 chomp($cid = <$pr>);
 673                 length($cid) == 40
 674                         or die "Cannot get commit id ($cid): $!\n";
 675                 print "Commit ID $cid\n" if $opt_v;
 676                 $pr->close();
 677
 678                 waitpid($pid,0);
 679                 die "Error running git-commit-tree: $?\n" if $?;
 680         }
 681
 682         if (not defined $cid) {
 683                 $cid = $branches{"/"}{"LAST"};
 684         }
 685
 686         if(not defined $dest) {
 687                 print "... no known parent\n" if $opt_v;
 688         } elsif(not $tag) {
 689                 print "Writing to refs/heads/$dest\n" if $opt_v;
 690                 open(C,">$git_dir/refs/heads/$dest") and
 691                 print C ("$cid\n") and
 692                 close(C)
 693                         or die "Cannot write branch $dest for update: $!\n";
 694         }
 695
 696         if($tag) {
 697                 my($in, $out) = ('','');
 698                 $last_rev = "-" if %$changed_paths;
 699                 # the tag was 'complex', i.e. did not refer to a "real" revision
 700
 701                 $dest =~ tr/_/\./ if $opt_u;
 702                 $branch = $dest;
 703
 704                 my $pid = open2($in, $out, 'git-mktag');
 705                 print $out ("object $cid\n".
 706                     "type commit\n".
 707                     "tag $dest\n".
 708                     "tagger $author_name <$author_email>\n") and
 709                 close($out)
 710                     or die "Cannot create tag object $dest: $!\n";
 711
 712                 my $tagobj = <$in>;
 713                 chomp $tagobj;
 714
 715                 if ( !close($in) or waitpid($pid, 0) != $pid or
 716                                 $? != 0 or $tagobj !~ /^[0123456789abcdef]{40}$/ ) {
 717                         die "Cannot create tag object $dest: $!\n";
 718                 }
 719
 720                 open(C,">$git_dir/refs/tags/$dest") and
 721                 print C ("$tagobj\n") and
 722                 close(C)
 723                         or die "Cannot create tag $branch: $!\n";
 724
 725                 print "Created tag '$dest' on '$branch'\n" if $opt_v;
 726         }
 727         $branches{$branch}{"LAST"} = $cid;
 728         $branches{$branch}{$revision} = $cid;
 729         $last_rev = $cid;
 730         print BRANCHES "$revision $branch $cid\n";
 731         print "DONE: $revision $dest $cid\n" if $opt_v;
 732 }
 733
 734 sub commit_all {
 735         # Recursive use of the SVN connection does not work
 736         local $svn = $svn2;
 737
 738         my ($changed_paths, $revision, $author, $date, $message, $pool) = @_;
 739         my %p;
 740         while(my($path,$action) = each %$changed_paths) {
 741                 $p{$path} = [ $action->action,$action->copyfrom_path, $action->copyfrom_rev, $path ];
 742         }
 743         $changed_paths = \%p;
 744
 745         my %done;
 746         my @col;
 747         my $pref;
 748         my $branch;
 749
 750         while(my($path,$action) = each %$changed_paths) {
 751                 ($branch,$path) = split_path($revision,$path);
 752                 next if not defined $branch;
 753                 $done{$branch}{$path} = $action;
 754         }
 755         while(($branch,$changed_paths) = each %done) {
 756                 commit($branch, $changed_paths, $revision, $author, $date, $message);
 757         }
 758 }
 759
 760 $opt_l = $svn->{'maxrev'} if not defined $opt_l or $opt_l > $svn->{'maxrev'};
 761
 762 if ($svn->{'maxrev'} < $current_rev) {
 763     print "Up to date: no new revisions to fetch!\n" if $opt_v;
 764     unlink("$git_dir/SVN2GIT_HEAD");
 765     exit;
 766 }
 767
 768 print "Fetching from $current_rev to $opt_l ...\n" if $opt_v;
 769
 770 my $pool=SVN::Pool->new;
 771 $svn->{'svn'}->get_log("/",$current_rev,$opt_l,0,1,1,\&commit_all,$pool);
 772 $pool->clear;
 773
 774
 775 unlink($git_index);
 776
 777 if (defined $orig_git_index) {
 778         $ENV{GIT_INDEX_FILE} = $orig_git_index;
 779 } else {
 780         delete $ENV{GIT_INDEX_FILE};
 781 }
 782
 783 # Now switch back to the branch we were in before all of this happened
 784 if($orig_branch) {
 785         print "DONE\n" if $opt_v and (not defined $opt_l or $opt_l > 0);
 786         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 787                 if $forward_master;
 788         unless ($opt_i) {
 789                 system('git-read-tree', '-m', '-u', 'SVN2GIT_HEAD', 'HEAD');
 790                 die "read-tree failed: $?\n" if $?;
 791         }
 792 } else {
 793         $orig_branch = "master";
 794         print "DONE; creating $orig_branch branch\n" if $opt_v and (not defined $opt_l or $opt_l > 0);
 795         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 796                 unless -f "$git_dir/refs/heads/master";
 797         system('git-update-ref', 'HEAD', "$orig_branch");
 798         unless ($opt_i) {
 799                 system('git checkout');
 800                 die "checkout failed: $?\n" if $?;
 801         }
 802 }
 803 unlink("$git_dir/SVN2GIT_HEAD");
 804 close(BRANCHES);