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