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 require 5.008; # for shell-safe open("-|",LIST)
  14 use strict;
  15 use warnings;
  16 use Getopt::Std;
  17 use File::Spec;
  18 use File::Temp qw(tempfile);
  19 use File::Path qw(mkpath);
  20 use File::Basename qw(basename dirname);
  21 use Time::Local;
  22 use IO::Pipe;
  23 use POSIX qw(strftime dup2);
  24 use IPC::Open2;
  25 use SVN::Core;
  26 use SVN::Ra;
  27
  28 die "Need SVN:Core 1.2.1 or better" if $SVN::Core::VERSION lt "1.2.1";
  29
  30 $SIG{'PIPE'}="IGNORE";
  31 $ENV{'TZ'}="UTC";
  32
  33 our($opt_h,$opt_o,$opt_v,$opt_u,$opt_C,$opt_i,$opt_m,$opt_M,$opt_t,$opt_T,$opt_b,$opt_s,$opt_l,$opt_d,$opt_D);
  34
  35 sub usage() {
  36         print STDERR <<END;
  37 Usage: ${\basename $0}     # fetch/update GIT from SVN
  38        [-o branch-for-HEAD] [-h] [-v] [-l max_num_changes]
  39        [-C GIT_repository] [-t tagname] [-T trunkname] [-b branchname]
  40        [-d|-D] [-i] [-u] [-s start_chg] [-m] [-M regex] [SVN_URL]
  41 END
  42         exit(1);
  43 }
  44
  45 getopts("b:C:dDhil:mM:o:s:t:T:uv") or usage();
  46 usage if $opt_h;
  47
  48 my $tag_name = $opt_t || "tags";
  49 my $trunk_name = $opt_T || "trunk";
  50 my $branch_name = $opt_b || "branches";
  51
  52 @ARGV == 1 or @ARGV == 2 or usage();
  53
  54 $opt_o ||= "origin";
  55 $opt_s ||= 1;
  56 my $git_tree = $opt_C;
  57 $git_tree ||= ".";
  58
  59 my $svn_url = $ARGV[0];
  60 my $svn_dir = $ARGV[1];
  61
  62 our @mergerx = ();
  63 if ($opt_m) {
  64         @mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
  65 }
  66 if ($opt_M) {
  67         push (@mergerx, qr/$opt_M/);
  68 }
  69
  70 select(STDERR); $|=1; select(STDOUT);
  71
  72
  73 package SVNconn;
  74 # Basic SVN connection.
  75 # We're only interested in connecting and downloading, so ...
  76
  77 use File::Spec;
  78 use File::Temp qw(tempfile);
  79 use POSIX qw(strftime dup2);
  80
  81 sub new {
  82         my($what,$repo) = @_;
  83         $what=ref($what) if ref($what);
  84
  85         my $self = {};
  86         $self->{'buffer'} = "";
  87         bless($self,$what);
  88
  89         $repo =~ s#/+$##;
  90         $self->{'fullrep'} = $repo;
  91         $self->conn();
  92
  93         return $self;
  94 }
  95
  96 sub conn {
  97         my $self = shift;
  98         my $repo = $self->{'fullrep'};
  99         my $s = SVN::Ra->new($repo);
 100
 101         die "SVN connection to $repo: $!\n" unless defined $s;
 102         $self->{'svn'} = $s;
 103         $self->{'repo'} = $repo;
 104         $self->{'maxrev'} = $s->get_latest_revnum();
 105 }
 106
 107 sub file {
 108         my($self,$path,$rev) = @_;
 109
 110         my ($fh, $name) = tempfile('gitsvn.XXXXXX',
 111                     DIR => File::Spec->tmpdir(), UNLINK => 1);
 112
 113         print "... $rev $path ...\n" if $opt_v;
 114         my $pool = SVN::Pool->new();
 115         eval { $self->{'svn'}->get_file($path,$rev,$fh,$pool); };
 116         $pool->clear;
 117         if($@) {
 118                 return undef if $@ =~ /Attempted to get checksum/;
 119                 die $@;
 120         }
 121         close ($fh);
 122
 123         return $name;
 124 }
 125
 126 package main;
 127 use URI;
 128
 129 my $svn = $svn_url;
 130 $svn .= "/$svn_dir" if defined $svn_dir;
 131 $svn = SVNconn->new($svn);
 132
 133 my $lwp_ua;
 134 if($opt_d or $opt_D) {
 135         $svn_url = URI->new($svn_url)->canonical;
 136         if($opt_D) {
 137                 $svn_dir =~ s#/*$#/#;
 138         } else {
 139                 $svn_dir = "";
 140         }
 141         if ($svn_url->scheme eq "http") {
 142                 use LWP::UserAgent;
 143                 $lwp_ua = LWP::UserAgent->new(keep_alive => 1, requests_redirectable => []);
 144         } else {
 145                 print STDERR "Warning: not HTTP; turning off direct file access\n";
 146                 $opt_d=0;
 147         }
 148 }
 149
 150 sub pdate($) {
 151         my($d) = @_;
 152         $d =~ m#(\d\d\d\d)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)#
 153                 or die "Unparseable date: $d\n";
 154         my $y=$1; $y-=1900 if $y>1900;
 155         return timegm($6||0,$5,$4,$3,$2-1,$y);
 156 }
 157
 158 sub getwd() {
 159         my $pwd = `pwd`;
 160         chomp $pwd;
 161         return $pwd;
 162 }
 163
 164
 165 sub get_headref($$) {
 166     my $name    = shift;
 167     my $git_dir = shift;
 168     my $sha;
 169
 170     if (open(C,"$git_dir/refs/heads/$name")) {
 171         chomp($sha = <C>);
 172         close(C);
 173         length($sha) == 40
 174             or die "Cannot get head id for $name ($sha): $!\n";
 175     }
 176     return $sha;
 177 }
 178
 179
 180 -d $git_tree
 181         or mkdir($git_tree,0777)
 182         or die "Could not create $git_tree: $!";
 183 chdir($git_tree);
 184
 185 my $orig_branch = "";
 186 my $forward_master = 0;
 187 my %branches;
 188
 189 my $git_dir = $ENV{"GIT_DIR"} || ".git";
 190 $git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
 191 $ENV{"GIT_DIR"} = $git_dir;
 192 my $orig_git_index;
 193 $orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
 194 my ($git_ih, $git_index) = tempfile('gitXXXXXX', SUFFIX => '.idx',
 195                                     DIR => File::Spec->tmpdir());
 196 close ($git_ih);
 197 $ENV{GIT_INDEX_FILE} = $git_index;
 198 my $maxnum = 0;
 199 my $last_rev = "";
 200 my $last_branch;
 201 my $current_rev = $opt_s-1;
 202 unless(-d $git_dir) {
 203         system("git-init-db");
 204         die "Cannot init the GIT db at $git_tree: $?\n" if $?;
 205         system("git-read-tree");
 206         die "Cannot init an empty tree: $?\n" if $?;
 207
 208         $last_branch = $opt_o;
 209         $orig_branch = "";
 210 } else {
 211         -f "$git_dir/refs/heads/$opt_o"
 212                 or die "Branch '$opt_o' does not exist.\n".
 213                        "Either use the correct '-o branch' option,\n".
 214                        "or import to a new repository.\n";
 215
 216         -f "$git_dir/svn2git"
 217                 or die "'$git_dir/svn2git' does not exist.\n".
 218                        "You need that file for incremental imports.\n";
 219         $last_branch = basename(readlink("$git_dir/HEAD"));
 220         unless($last_branch) {
 221                 warn "Cannot read the last branch name: $! -- assuming 'master'\n";
 222                 $last_branch = "master";
 223         }
 224         $orig_branch = $last_branch;
 225         $last_rev = get_headref($orig_branch, $git_dir);
 226         if (-f "$git_dir/SVN2GIT_HEAD") {
 227                 die <<EOM;
 228 SVN2GIT_HEAD exists.
 229 Make sure your working directory corresponds to HEAD and remove SVN2GIT_HEAD.
 230 You may need to run
 231
 232     git-read-tree -m -u SVN2GIT_HEAD HEAD
 233 EOM
 234         }
 235         system('cp', "$git_dir/HEAD", "$git_dir/SVN2GIT_HEAD");
 236
 237         $forward_master =
 238             $opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
 239             system('cmp', '-s', "$git_dir/refs/heads/master",
 240                                 "$git_dir/refs/heads/$opt_o") == 0;
 241
 242         # populate index
 243         system('git-read-tree', $last_rev);
 244         die "read-tree failed: $?\n" if $?;
 245
 246         # Get the last import timestamps
 247         open my $B,"<", "$git_dir/svn2git";
 248         while(<$B>) {
 249                 chomp;
 250                 my($num,$branch,$ref) = split;
 251                 $branches{$branch}{$num} = $ref;
 252                 $branches{$branch}{"LAST"} = $ref;
 253                 $current_rev = $num if $current_rev < $num;
 254         }
 255         close($B);
 256 }
 257 -d $git_dir
 258         or die "Could not create git subdir ($git_dir).\n";
 259
 260 open BRANCHES,">>", "$git_dir/svn2git";
 261
 262 sub node_kind($$$) {
 263         my ($branch, $path, $revision) = @_;
 264         my $pool=SVN::Pool->new;
 265         my $kind = $svn->{'svn'}->check_path(revert_split_path($branch,$path),$revision,$pool);
 266         $pool->clear;
 267         return $kind;
 268 }
 269
 270 sub revert_split_path($$) {
 271         my($branch,$path) = @_;
 272
 273         my $svnpath;
 274         $path = "" if $path eq "/"; # this should not happen, but ...
 275         if($branch eq "/") {
 276                 $svnpath = "$trunk_name/$path";
 277         } elsif($branch =~ m#^/#) {
 278                 $svnpath = "$tag_name$branch/$path";
 279         } else {
 280                 $svnpath = "$branch_name/$branch/$path";
 281         }
 282
 283         $svnpath =~ s#/+$##;
 284         return $svnpath;
 285 }
 286
 287 sub get_file($$$) {
 288         my($rev,$branch,$path) = @_;
 289
 290         my $svnpath = revert_split_path($branch,$path);
 291
 292         # now get it
 293         my $name;
 294         if($opt_d) {
 295                 my($req,$res);
 296
 297                 # /svn/!svn/bc/2/django/trunk/django-docs/build.py
 298                 my $url=$svn_url->clone();
 299                 $url->path($url->path."/!svn/bc/$rev/$svn_dir$svnpath");
 300                 print "... $path...\n" if $opt_v;
 301                 $req = HTTP::Request->new(GET => $url);
 302                 $res = $lwp_ua->request($req);
 303                 if ($res->is_success) {
 304                         my $fh;
 305                         ($fh, $name) = tempfile('gitsvn.XXXXXX',
 306                         DIR => File::Spec->tmpdir(), UNLINK => 1);
 307                         print $fh $res->content;
 308                         close($fh) or die "Could not write $name: $!\n";
 309                 } else {
 310                         return undef if $res->code == 301; # directory?
 311                         die $res->status_line." at $url\n";
 312                 }
 313         } else {
 314                 $name = $svn->file("/$svnpath",$rev);
 315                 return undef unless defined $name;
 316         }
 317
 318         open my $F, '-|', "git-hash-object", "-w", $name
 319                 or die "Cannot create object: $!\n";
 320         my $sha = <$F>;
 321         chomp $sha;
 322         close $F;
 323         unlink $name;
 324         my $mode = "0644"; # SV does not seem to store any file modes
 325         return [$mode, $sha, $path];
 326 }
 327
 328 sub split_path($$) {
 329         my($rev,$path) = @_;
 330         my $branch;
 331
 332         if($path =~ s#^/\Q$tag_name\E/([^/]+)/?##) {
 333                 $branch = "/$1";
 334         } elsif($path =~ s#^/\Q$trunk_name\E/?##) {
 335                 $branch = "/";
 336         } elsif($path =~ s#^/\Q$branch_name\E/([^/]+)/?##) {
 337                 $branch = $1;
 338         } else {
 339                 my %no_error = (
 340                         "/" => 1,
 341                         "/$tag_name" => 1,
 342                         "/$branch_name" => 1
 343                 );
 344                 print STDERR "$rev: Unrecognized path: $path\n" unless (defined $no_error{$path});
 345                 return ()
 346         }
 347         $path = "/" if $path eq "";
 348         return ($branch,$path);
 349 }
 350
 351 sub branch_rev($$) {
 352
 353         my ($srcbranch,$uptorev) = @_;
 354
 355         my $bbranches = $branches{$srcbranch};
 356         my @revs = reverse sort { ($a eq 'LAST' ? 0 : $a) <=> ($b eq 'LAST' ? 0 : $b) } keys %$bbranches;
 357         my $therev;
 358         foreach my $arev(@revs) {
 359                 next if  ($arev eq 'LAST');
 360                 if ($arev <= $uptorev) {
 361                         $therev = $arev;
 362                         last;
 363                 }
 364         }
 365         return $therev;
 366 }
 367
 368 sub copy_path($$$$$$$$) {
 369         # Somebody copied a whole subdirectory.
 370         # We need to find the index entries from the old version which the
 371         # SVN log entry points to, and add them to the new place.
 372
 373         my($newrev,$newbranch,$path,$oldpath,$rev,$node_kind,$new,$parents) = @_;
 374
 375         my($srcbranch,$srcpath) = split_path($rev,$oldpath);
 376         unless(defined $srcbranch) {
 377                 print "Path not found when copying from $oldpath @ $rev\n";
 378                 return;
 379         }
 380         my $therev = branch_rev($srcbranch, $rev);
 381         my $gitrev = $branches{$srcbranch}{$therev};
 382         unless($gitrev) {
 383                 print STDERR "$newrev:$newbranch: could not find $oldpath \@ $rev\n";
 384                 return;
 385         }
 386         if ($srcbranch ne $newbranch) {
 387                 push(@$parents, $branches{$srcbranch}{'LAST'});
 388         }
 389         print "$newrev:$newbranch:$path: copying from $srcbranch:$srcpath @ $rev\n" if $opt_v;
 390         if ($node_kind eq $SVN::Node::dir) {
 391                         $srcpath =~ s#/*$#/#;
 392         }
 393
 394         open my $f,"-|","git-ls-tree","-r","-z",$gitrev,$srcpath;
 395         local $/ = "\0";
 396         while(<$f>) {
 397                 chomp;
 398                 my($m,$p) = split(/\t/,$_,2);
 399                 my($mode,$type,$sha1) = split(/ /,$m);
 400                 next if $type ne "blob";
 401                 if ($node_kind eq $SVN::Node::dir) {
 402                         $p = $path . substr($p,length($srcpath)-1);
 403                 } else {
 404                         $p = $path;
 405                 }
 406                 push(@$new,[$mode,$sha1,$p]);
 407         }
 408         close($f) or
 409                 print STDERR "$newrev:$newbranch: could not list files in $oldpath \@ $rev\n";
 410 }
 411
 412 sub commit {
 413         my($branch, $changed_paths, $revision, $author, $date, $message) = @_;
 414         my($author_name,$author_email,$dest);
 415         my(@old,@new,@parents);
 416
 417         if (not defined $author) {
 418                 $author_name = $author_email = "unknown";
 419         } elsif ($author =~ /^(.*?)\s+<(.*)>$/) {
 420                 ($author_name, $author_email) = ($1, $2);
 421         } else {
 422                 $author =~ s/^<(.*)>$/$1/;
 423                 $author_name = $author_email = $author;
 424         }
 425         $date = pdate($date);
 426
 427         my $tag;
 428         my $parent;
 429         if($branch eq "/") { # trunk
 430                 $parent = $opt_o;
 431         } elsif($branch =~ m#^/(.+)#) { # tag
 432                 $tag = 1;
 433                 $parent = $1;
 434         } else { # "normal" branch
 435                 # nothing to do
 436                 $parent = $branch;
 437         }
 438         $dest = $parent;
 439
 440         my $prev = $changed_paths->{"/"};
 441         if($prev and $prev->[0] eq "A") {
 442                 delete $changed_paths->{"/"};
 443                 my $oldpath = $prev->[1];
 444                 my $rev;
 445                 if(defined $oldpath) {
 446                         my $p;
 447                         ($parent,$p) = split_path($revision,$oldpath);
 448                         if($parent eq "/") {
 449                                 $parent = $opt_o;
 450                         } else {
 451                                 $parent =~ s#^/##; # if it's a tag
 452                         }
 453                 } else {
 454                         $parent = undef;
 455                 }
 456         }
 457
 458         my $rev;
 459         if($revision > $opt_s and defined $parent) {
 460                 open(H,"git-rev-parse --verify $parent |");
 461                 $rev = <H>;
 462                 close(H) or do {
 463                         print STDERR "$revision: cannot find commit '$parent'!\n";
 464                         return;
 465                 };
 466                 chop $rev;
 467                 if(length($rev) != 40) {
 468                         print STDERR "$revision: cannot find commit '$parent'!\n";
 469                         return;
 470                 }
 471                 $rev = $branches{($parent eq $opt_o) ? "/" : $parent}{"LAST"};
 472                 if($revision != $opt_s and not $rev) {
 473                         print STDERR "$revision: do not know ancestor for '$parent'!\n";
 474                         return;
 475                 }
 476         } else {
 477                 $rev = undef;
 478         }
 479
 480 #       if($prev and $prev->[0] eq "A") {
 481 #               if(not $tag) {
 482 #                       unless(open(H,"> $git_dir/refs/heads/$branch")) {
 483 #                               print STDERR "$revision: Could not create branch $branch: $!\n";
 484 #                               $state=11;
 485 #                               next;
 486 #                       }
 487 #                       print H "$rev\n"
 488 #                               or die "Could not write branch $branch: $!";
 489 #                       close(H)
 490 #                               or die "Could not write branch $branch: $!";
 491 #               }
 492 #       }
 493         if(not defined $rev) {
 494                 unlink($git_index);
 495         } elsif ($rev ne $last_rev) {
 496                 print "Switching from $last_rev to $rev ($branch)\n" if $opt_v;
 497                 system("git-read-tree", $rev);
 498                 die "read-tree failed for $rev: $?\n" if $?;
 499                 $last_rev = $rev;
 500         }
 501
 502         push (@parents, $rev) if defined $rev;
 503
 504         my $cid;
 505         if($tag and not %$changed_paths) {
 506                 $cid = $rev;
 507         } else {
 508                 my @paths = sort keys %$changed_paths;
 509                 foreach my $path(@paths) {
 510                         my $action = $changed_paths->{$path};
 511
 512                         if ($action->[0] eq "R") {
 513                                 # refer to a file/tree in an earlier commit
 514                                 push(@old,$path); # remove any old stuff
 515                         }
 516                         if(($action->[0] eq "A") || ($action->[0] eq "R")) {
 517                                 my $node_kind = node_kind($branch,$path,$revision);
 518                                 if($action->[1]) {
 519                                         copy_path($revision,$branch,$path,$action->[1],$action->[2],$node_kind,\@new,\@parents);
 520                                 } elsif ($node_kind eq $SVN::Node::file) {
 521                                         my $f = get_file($revision,$branch,$path);
 522                                         if ($f) {
 523                                                 push(@new,$f) if $f;
 524                                         } else {
 525                                                 my $opath = $action->[3];
 526                                                 print STDERR "$revision: $branch: could not fetch '$opath'\n";
 527                                         }
 528                                 }
 529                         } elsif ($action->[0] eq "D") {
 530                                 push(@old,$path);
 531                         } elsif ($action->[0] eq "M") {
 532                                 my $node_kind = node_kind($branch,$path,$revision);
 533                                 if ($node_kind eq $SVN::Node::file) {
 534                                         my $f = get_file($revision,$branch,$path);
 535                                         push(@new,$f) if $f;
 536                                 }
 537                         } else {
 538                                 die "$revision: unknown action '".$action->[0]."' for $path\n";
 539                         }
 540                 }
 541
 542                 if(@old) {
 543                         open my $F, "-|", "git-ls-files", "-z", @old or die $!;
 544                         @old = ();
 545                         local $/ = "\0";
 546                         while(<$F>) {
 547                                 chomp;
 548                                 push(@old,$_);
 549                         }
 550                         close($F);
 551
 552                         while(@old) {
 553                                 my @o2;
 554                                 if(@old > 55) {
 555                                         @o2 = splice(@old,0,50);
 556                                 } else {
 557                                         @o2 = @old;
 558                                         @old = ();
 559                                 }
 560                                 system("git-update-index","--force-remove","--",@o2);
 561                                 die "Cannot remove files: $?\n" if $?;
 562                         }
 563                 }
 564                 while(@new) {
 565                         my @n2;
 566                         if(@new > 12) {
 567                                 @n2 = splice(@new,0,10);
 568                         } else {
 569                                 @n2 = @new;
 570                                 @new = ();
 571                         }
 572                         system("git-update-index","--add",
 573                                 (map { ('--cacheinfo', @$_) } @n2));
 574                         die "Cannot add files: $?\n" if $?;
 575                 }
 576
 577                 my $pid = open(C,"-|");
 578                 die "Cannot fork: $!" unless defined $pid;
 579                 unless($pid) {
 580                         exec("git-write-tree");
 581                         die "Cannot exec git-write-tree: $!\n";
 582                 }
 583                 chomp(my $tree = <C>);
 584                 length($tree) == 40
 585                         or die "Cannot get tree id ($tree): $!\n";
 586                 close(C)
 587                         or die "Error running git-write-tree: $?\n";
 588                 print "Tree ID $tree\n" if $opt_v;
 589
 590                 my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 591                 my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 592                 $pid = fork();
 593                 die "Fork: $!\n" unless defined $pid;
 594                 unless($pid) {
 595                         $pr->writer();
 596                         $pw->reader();
 597                         open(OUT,">&STDOUT");
 598                         dup2($pw->fileno(),0);
 599                         dup2($pr->fileno(),1);
 600                         $pr->close();
 601                         $pw->close();
 602
 603                         my @par = ();
 604
 605                         # loose detection of merges
 606                         # based on the commit msg
 607                         foreach my $rx (@mergerx) {
 608                                 if ($message =~ $rx) {
 609                                         my $mparent = $1;
 610                                         if ($mparent eq 'HEAD') { $mparent = $opt_o };
 611                                         if ( -e "$git_dir/refs/heads/$mparent") {
 612                                                 $mparent = get_headref($mparent, $git_dir);
 613                                                 push (@parents, $mparent);
 614                                                 print OUT "Merge parent branch: $mparent\n" if $opt_v;
 615                                         }
 616                                 }
 617                         }
 618                         my %seen_parents = ();
 619                         my @unique_parents = grep { ! $seen_parents{$_} ++ } @parents;
 620                         foreach my $bparent (@unique_parents) {
 621                                 push @par, '-p', $bparent;
 622                                 print OUT "Merge parent branch: $bparent\n" if $opt_v;
 623                         }
 624
 625                         exec("env",
 626                                 "GIT_AUTHOR_NAME=$author_name",
 627                                 "GIT_AUTHOR_EMAIL=$author_email",
 628                                 "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 629                                 "GIT_COMMITTER_NAME=$author_name",
 630                                 "GIT_COMMITTER_EMAIL=$author_email",
 631                                 "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 632                                 "git-commit-tree", $tree,@par);
 633                         die "Cannot exec git-commit-tree: $!\n";
 634                 }
 635                 $pw->writer();
 636                 $pr->reader();
 637
 638                 $message =~ s/[\s\n]+\z//;
 639
 640                 print $pw "$message\n"
 641                         or die "Error writing to git-commit-tree: $!\n";
 642                 $pw->close();
 643
 644                 print "Committed change $revision:$branch ".strftime("%Y-%m-%d %H:%M:%S",gmtime($date)).")\n" if $opt_v;
 645                 chomp($cid = <$pr>);
 646                 length($cid) == 40
 647                         or die "Cannot get commit id ($cid): $!\n";
 648                 print "Commit ID $cid\n" if $opt_v;
 649                 $pr->close();
 650
 651                 waitpid($pid,0);
 652                 die "Error running git-commit-tree: $?\n" if $?;
 653         }
 654
 655         if (not defined $cid) {
 656                 $cid = $branches{"/"}{"LAST"};
 657         }
 658
 659         if(not defined $dest) {
 660                 print "... no known parent\n" if $opt_v;
 661         } elsif(not $tag) {
 662                 print "Writing to refs/heads/$dest\n" if $opt_v;
 663                 open(C,">$git_dir/refs/heads/$dest") and
 664                 print C ("$cid\n") and
 665                 close(C)
 666                         or die "Cannot write branch $dest for update: $!\n";
 667         }
 668
 669         if($tag) {
 670                 my($in, $out) = ('','');
 671                 $last_rev = "-" if %$changed_paths;
 672                 # the tag was 'complex', i.e. did not refer to a "real" revision
 673
 674                 $dest =~ tr/_/\./ if $opt_u;
 675                 $branch = $dest;
 676
 677                 my $pid = open2($in, $out, 'git-mktag');
 678                 print $out ("object $cid\n".
 679                     "type commit\n".
 680                     "tag $dest\n".
 681                     "tagger $author_name <$author_email>\n") and
 682                 close($out)
 683                     or die "Cannot create tag object $dest: $!\n";
 684
 685                 my $tagobj = <$in>;
 686                 chomp $tagobj;
 687
 688                 if ( !close($in) or waitpid($pid, 0) != $pid or
 689                                 $? != 0 or $tagobj !~ /^[0123456789abcdef]{40}$/ ) {
 690                         die "Cannot create tag object $dest: $!\n";
 691                 }
 692
 693                 open(C,">$git_dir/refs/tags/$dest") and
 694                 print C ("$tagobj\n") and
 695                 close(C)
 696                         or die "Cannot create tag $branch: $!\n";
 697
 698                 print "Created tag '$dest' on '$branch'\n" if $opt_v;
 699         }
 700         $branches{$branch}{"LAST"} = $cid;
 701         $branches{$branch}{$revision} = $cid;
 702         $last_rev = $cid;
 703         print BRANCHES "$revision $branch $cid\n";
 704         print "DONE: $revision $dest $cid\n" if $opt_v;
 705 }
 706
 707 my ($changed_paths, $revision, $author, $date, $message, $pool) = @_;
 708 sub _commit_all {
 709         ($changed_paths, $revision, $author, $date, $message, $pool) = @_;
 710         my %p;
 711         while(my($path,$action) = each %$changed_paths) {
 712                 $p{$path} = [ $action->action,$action->copyfrom_path, $action->copyfrom_rev, $path ];
 713         }
 714         $changed_paths = \%p;
 715 }
 716
 717 sub commit_all {
 718         my %done;
 719         my @col;
 720         my $pref;
 721         my $branch;
 722
 723         while(my($path,$action) = each %$changed_paths) {
 724                 ($branch,$path) = split_path($revision,$path);
 725                 next if not defined $branch;
 726                 $done{$branch}{$path} = $action;
 727         }
 728         while(($branch,$changed_paths) = each %done) {
 729                 commit($branch, $changed_paths, $revision, $author, $date, $message);
 730         }
 731 }
 732
 733 while(++$current_rev <= $svn->{'maxrev'}) {
 734         if (defined $opt_l) {
 735                 $opt_l--;
 736                 if ($opt_l < 0) {
 737                         last;
 738                 }
 739         }
 740         my $pool=SVN::Pool->new;
 741         $svn->{'svn'}->get_log("/",$current_rev,$current_rev,1,1,1,\&_commit_all,$pool);
 742         $pool->clear;
 743         commit_all();
 744 }
 745
 746
 747 unlink($git_index);
 748
 749 if (defined $orig_git_index) {
 750         $ENV{GIT_INDEX_FILE} = $orig_git_index;
 751 } else {
 752         delete $ENV{GIT_INDEX_FILE};
 753 }
 754
 755 # Now switch back to the branch we were in before all of this happened
 756 if($orig_branch) {
 757         print "DONE\n" if $opt_v and (not defined $opt_l or $opt_l > 0);
 758         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 759                 if $forward_master;
 760         unless ($opt_i) {
 761                 system('git-read-tree', '-m', '-u', 'SVN2GIT_HEAD', 'HEAD');
 762                 die "read-tree failed: $?\n" if $?;
 763         }
 764 } else {
 765         $orig_branch = "master";
 766         print "DONE; creating $orig_branch branch\n" if $opt_v and (not defined $opt_l or $opt_l > 0);
 767         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 768                 unless -f "$git_dir/refs/heads/master";
 769         unlink("$git_dir/HEAD");
 770         symlink("refs/heads/$orig_branch","$git_dir/HEAD");
 771         unless ($opt_i) {
 772                 system('git checkout');
 773                 die "checkout failed: $?\n" if $?;
 774         }
 775 }
 776 unlink("$git_dir/SVN2GIT_HEAD");
 777 close(BRANCHES);