git-cvsimport-script

   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 aggregate CVS check-ins into related changes.
   7 # Fortunately, "cvsps" does that for us; all we have to do is to parse
   8 # its output.
   9 #
  10 # Checking out the files is done by a single long-running CVS connection
  11 # / server process.
  12 #
  13 # The head revision is on branch "origin" by default.
  14 # You can change that with the '-o' option.
  15
  16 use strict;
  17 use warnings;
  18 use Getopt::Std;
  19 use File::Spec;
  20 use File::Temp qw(tempfile);
  21 use File::Path qw(mkpath);
  22 use File::Basename qw(basename dirname);
  23 use Time::Local;
  24 use IO::Socket;
  25 use IO::Pipe;
  26 use POSIX qw(strftime dup2);
  27
  28 $SIG{'PIPE'}="IGNORE";
  29 $ENV{'TZ'}="UTC";
  30
  31 our($opt_h,$opt_o,$opt_v,$opt_k,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_s);
  32
  33 sub usage() {
  34         print STDERR <<END;
  35 Usage: ${\basename $0}     # fetch/update GIT from CVS
  36        [ -o branch-for-HEAD ] [ -h ] [ -v ] [ -d CVSROOT ]
  37        [ -p opts-for-cvsps ] [ -C GIT_repository ] [ -z fuzz ]
  38        [ -i ] [ -k ] [-s subst] [ CVS_module ]
  39 END
  40         exit(1);
  41 }
  42
  43 getopts("hivko:d:p:C:z:s:") or usage();
  44 usage if $opt_h;
  45
  46 @ARGV <= 1 or usage();
  47
  48 if($opt_d) {
  49         $ENV{"CVSROOT"} = $opt_d;
  50 } elsif(-f 'CVS/Root') {
  51         open my $f, '<', 'CVS/Root' or die 'Failed to open CVS/Root';
  52         $opt_d = <$f>;
  53         chomp $opt_d;
  54         close $f;
  55         $ENV{"CVSROOT"} = $opt_d;
  56 } elsif($ENV{"CVSROOT"}) {
  57         $opt_d = $ENV{"CVSROOT"};
  58 } else {
  59         die "CVSROOT needs to be set";
  60 }
  61 $opt_o ||= "origin";
  62 $opt_s ||= "-";
  63 my $git_tree = $opt_C;
  64 $git_tree ||= ".";
  65
  66 my $cvs_tree;
  67 if ($#ARGV == 0) {
  68         $cvs_tree = $ARGV[0];
  69 } elsif (-f 'CVS/Repository') {
  70         open my $f, '<', 'CVS/Repository' or
  71             die 'Failed to open CVS/Repository';
  72         $cvs_tree = <$f>;
  73         chomp $cvs_tree;
  74         close $f
  75 } else {
  76         usage();
  77 }
  78
  79 select(STDERR); $|=1; select(STDOUT);
  80
  81
  82 package CVSconn;
  83 # Basic CVS dialog.
  84 # We're only interested in connecting and downloading, so ...
  85
  86 use File::Spec;
  87 use File::Temp qw(tempfile);
  88 use POSIX qw(strftime dup2);
  89
  90 sub new {
  91         my($what,$repo,$subdir) = @_;
  92         $what=ref($what) if ref($what);
  93
  94         my $self = {};
  95         $self->{'buffer'} = "";
  96         bless($self,$what);
  97
  98         $repo =~ s#/+$##;
  99         $self->{'fullrep'} = $repo;
 100         $self->conn();
 101
 102         $self->{'subdir'} = $subdir;
 103         $self->{'lines'} = undef;
 104
 105         return $self;
 106 }
 107
 108 sub conn {
 109         my $self = shift;
 110         my $repo = $self->{'fullrep'};
 111         if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
 112                 my($user,$pass,$serv,$port) = ($1,$2,$3,$4);
 113                 $user="anonymous" unless defined $user;
 114                 my $rr2 = "-";
 115                 unless($port) {
 116                         $rr2 = ":pserver:$user\@$serv:$repo";
 117                         $port=2401;
 118                 }
 119                 my $rr = ":pserver:$user\@$serv:$port$repo";
 120
 121                 unless($pass) {
 122                         open(H,$ENV{'HOME'}."/.cvspass") and do {
 123                                 # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
 124                                 while(<H>) {
 125                                         chomp;
 126                                         s/^\/\d+\s+//;
 127                                         my ($w,$p) = split(/\s/,$_,2);
 128                                         if($w eq $rr or $w eq $rr2) {
 129                                                 $pass = $p;
 130                                                 last;
 131                                         }
 132                                 }
 133                         };
 134                 }
 135                 $pass="A" unless $pass;
 136
 137                 my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
 138                 die "Socket to $serv: $!\n" unless defined $s;
 139                 $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
 140                         or die "Write to $serv: $!\n";
 141                 $s->flush();
 142
 143                 my $rep = <$s>;
 144
 145                 if($rep ne "I LOVE YOU\n") {
 146                         $rep="<unknown>" unless $rep;
 147                         die "AuthReply: $rep\n";
 148                 }
 149                 $self->{'socketo'} = $s;
 150                 $self->{'socketi'} = $s;
 151         } else { # local or ext: Fork off our own cvs server.
 152                 my $pr = IO::Pipe->new();
 153                 my $pw = IO::Pipe->new();
 154                 my $pid = fork();
 155                 die "Fork: $!\n" unless defined $pid;
 156                 my $cvs = 'cvs';
 157                 $cvs = $ENV{CVS_SERVER} if exists $ENV{CVS_SERVER};
 158                 my $rsh = 'rsh';
 159                 $rsh = $ENV{CVS_RSH} if exists $ENV{CVS_RSH};
 160
 161                 my @cvs = ($cvs, 'server');
 162                 my ($local, $user, $host);
 163                 $local = $repo =~ s/:local://;
 164                 if (!$local) {
 165                     $repo =~ s/:ext://;
 166                     $local = !($repo =~ s/^(?:([^\@:]+)\@)?([^:]+)://);
 167                     ($user, $host) = ($1, $2);
 168                 }
 169                 if (!$local) {
 170                     if ($user) {
 171                         unshift @cvs, $rsh, '-l', $user, $host;
 172                     } else {
 173                         unshift @cvs, $rsh, $host;
 174                     }
 175                 }
 176
 177                 unless($pid) {
 178                         $pr->writer();
 179                         $pw->reader();
 180                         dup2($pw->fileno(),0);
 181                         dup2($pr->fileno(),1);
 182                         $pr->close();
 183                         $pw->close();
 184                         exec(@cvs);
 185                 }
 186                 $pw->writer();
 187                 $pr->reader();
 188                 $self->{'socketo'} = $pw;
 189                 $self->{'socketi'} = $pr;
 190         }
 191         $self->{'socketo'}->write("Root $repo\n");
 192
 193         # Trial and error says that this probably is the minimum set
 194         $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E Checked-in Created Updated Merged Removed\n");
 195
 196         $self->{'socketo'}->write("valid-requests\n");
 197         $self->{'socketo'}->flush();
 198
 199         chomp(my $rep=$self->readline());
 200         if($rep !~ s/^Valid-requests\s*//) {
 201                 $rep="<unknown>" unless $rep;
 202                 die "Expected Valid-requests from server, but got: $rep\n";
 203         }
 204         chomp(my $res=$self->readline());
 205         die "validReply: $res\n" if $res ne "ok";
 206
 207         $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
 208         $self->{'repo'} = $repo;
 209 }
 210
 211 sub readline {
 212         my($self) = @_;
 213         return $self->{'socketi'}->getline();
 214 }
 215
 216 sub _file {
 217         # Request a file with a given revision.
 218         # Trial and error says this is a good way to do it. :-/
 219         my($self,$fn,$rev) = @_;
 220         $self->{'socketo'}->write("Argument -N\n") or return undef;
 221         $self->{'socketo'}->write("Argument -P\n") or return undef;
 222         # -kk: Linus' version doesn't use it - defaults to off
 223         if ($opt_k) {
 224             $self->{'socketo'}->write("Argument -kk\n") or return undef;
 225         }
 226         $self->{'socketo'}->write("Argument -r\n") or return undef;
 227         $self->{'socketo'}->write("Argument $rev\n") or return undef;
 228         $self->{'socketo'}->write("Argument --\n") or return undef;
 229         $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
 230         $self->{'socketo'}->write("Directory .\n") or return undef;
 231         $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
 232         # $self->{'socketo'}->write("Sticky T1.0\n") or return undef;
 233         $self->{'socketo'}->write("co\n") or return undef;
 234         $self->{'socketo'}->flush() or return undef;
 235         $self->{'lines'} = 0;
 236         return 1;
 237 }
 238 sub _line {
 239         # Read a line from the server.
 240         # ... except that 'line' may be an entire file. ;-)
 241         my($self, $fh) = @_;
 242         die "Not in lines" unless defined $self->{'lines'};
 243
 244         my $line;
 245         my $res=0;
 246         while(defined($line = $self->readline())) {
 247                 # M U gnupg-cvs-rep/AUTHORS
 248                 # Updated gnupg-cvs-rep/
 249                 # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
 250                 # /AUTHORS/1.1///T1.1
 251                 # u=rw,g=rw,o=rw
 252                 # 0
 253                 # ok
 254
 255                 if($line =~ s/^(?:Created|Updated) //) {
 256                         $line = $self->readline(); # path
 257                         $line = $self->readline(); # Entries line
 258                         my $mode = $self->readline(); chomp $mode;
 259                         $self->{'mode'} = $mode;
 260                         defined (my $cnt = $self->readline())
 261                                 or die "EOF from server after 'Changed'\n";
 262                         chomp $cnt;
 263                         die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
 264                         $line="";
 265                         $res=0;
 266                         while($cnt) {
 267                                 my $buf;
 268                                 my $num = $self->{'socketi'}->read($buf,$cnt);
 269                                 die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
 270                                 print $fh $buf;
 271                                 $res += $num;
 272                                 $cnt -= $num;
 273                         }
 274                 } elsif($line =~ s/^ //) {
 275                         print $fh $line;
 276                         $res += length($line);
 277                 } elsif($line =~ /^M\b/) {
 278                         # output, do nothing
 279                 } elsif($line =~ /^Mbinary\b/) {
 280                         my $cnt;
 281                         die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
 282                         chomp $cnt;
 283                         die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
 284                         $line="";
 285                         while($cnt) {
 286                                 my $buf;
 287                                 my $num = $self->{'socketi'}->read($buf,$cnt);
 288                                 die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0;
 289                                 print $fh $buf;
 290                                 $res += $num;
 291                                 $cnt -= $num;
 292                         }
 293                 } else {
 294                         chomp $line;
 295                         if($line eq "ok") {
 296                                 # print STDERR "S: ok (".length($res).")\n";
 297                                 return $res;
 298                         } elsif($line =~ s/^E //) {
 299                                 # print STDERR "S: $line\n";
 300                         } elsif($line =~ /^Remove-entry /i) {
 301                                 $line = $self->readline(); # filename
 302                                 $line = $self->readline(); # OK
 303                                 chomp $line;
 304                                 die "Unknown: $line" if $line ne "ok";
 305                                 return -1;
 306                         } else {
 307                                 die "Unknown: $line\n";
 308                         }
 309                 }
 310         }
 311 }
 312 sub file {
 313         my($self,$fn,$rev) = @_;
 314         my $res;
 315
 316         my ($fh, $name) = tempfile('gitcvs.XXXXXX',
 317                     DIR => File::Spec->tmpdir(), UNLINK => 1);
 318
 319         $self->_file($fn,$rev) and $res = $self->_line($fh);
 320
 321         if (!defined $res) {
 322             # retry
 323             $self->conn();
 324             $self->_file($fn,$rev)
 325                     or die "No file command send\n";
 326             $res = $self->_line($fh);
 327             die "No input: $fn $rev\n" unless defined $res;
 328         }
 329         close ($fh);
 330
 331         return ($name, $res);
 332 }
 333
 334
 335 package main;
 336
 337 my $cvs = CVSconn->new($opt_d, $cvs_tree);
 338
 339
 340 sub pdate($) {
 341         my($d) = @_;
 342         m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?#
 343                 or die "Unparseable date: $d\n";
 344         my $y=$1; $y-=1900 if $y>1900;
 345         return timegm($6||0,$5,$4,$3,$2-1,$y);
 346 }
 347
 348 sub pmode($) {
 349         my($mode) = @_;
 350         my $m = 0;
 351         my $mm = 0;
 352         my $um = 0;
 353         for my $x(split(//,$mode)) {
 354                 if($x eq ",") {
 355                         $m |= $mm&$um;
 356                         $mm = 0;
 357                         $um = 0;
 358                 } elsif($x eq "u") { $um |= 0700;
 359                 } elsif($x eq "g") { $um |= 0070;
 360                 } elsif($x eq "o") { $um |= 0007;
 361                 } elsif($x eq "r") { $mm |= 0444;
 362                 } elsif($x eq "w") { $mm |= 0222;
 363                 } elsif($x eq "x") { $mm |= 0111;
 364                 } elsif($x eq "=") { # do nothing
 365                 } else { die "Unknown mode: $mode\n";
 366                 }
 367         }
 368         $m |= $mm&$um;
 369         return $m;
 370 }
 371
 372 sub getwd() {
 373         my $pwd = `pwd`;
 374         chomp $pwd;
 375         return $pwd;
 376 }
 377
 378 -d $git_tree
 379         or mkdir($git_tree,0777)
 380         or die "Could not create $git_tree: $!";
 381 chdir($git_tree);
 382
 383 my $last_branch = "";
 384 my $orig_branch = "";
 385 my $forward_master = 0;
 386 my %branch_date;
 387
 388 my $git_dir = $ENV{"GIT_DIR"} || ".git";
 389 $git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
 390 $ENV{"GIT_DIR"} = $git_dir;
 391 my $orig_git_index;
 392 $orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
 393 my ($git_ih, $git_index) = tempfile('gitXXXXXX', SUFFIX => '.idx',
 394                                     DIR => File::Spec->tmpdir());
 395 close ($git_ih);
 396 $ENV{GIT_INDEX_FILE} = $git_index;
 397 unless(-d $git_dir) {
 398         system("git-init-db");
 399         die "Cannot init the GIT db at $git_tree: $?\n" if $?;
 400         system("git-read-tree");
 401         die "Cannot init an empty tree: $?\n" if $?;
 402
 403         $last_branch = $opt_o;
 404         $orig_branch = "";
 405 } else {
 406         -f "$git_dir/refs/heads/$opt_o"
 407                 or die "Branch '$opt_o' does not exist.\n".
 408                        "Either use the correct '-o branch' option,\n".
 409                        "or import to a new repository.\n";
 410
 411         $last_branch = basename(readlink("$git_dir/HEAD"));
 412         unless($last_branch) {
 413                 warn "Cannot read the last branch name: $! -- assuming 'master'\n";
 414                 $last_branch = "master";
 415         }
 416         $orig_branch = $last_branch;
 417         if (-f "$git_dir/CVS2GIT_HEAD") {
 418                 die <<EOM;
 419 CVS2GIT_HEAD exists.
 420 Make sure your working directory corresponds to HEAD and remove CVS2GIT_HEAD.
 421 You may need to run
 422
 423     git-read-tree -m -u CVS2GIT_HEAD HEAD
 424 EOM
 425         }
 426         system('cp', "$git_dir/HEAD", "$git_dir/CVS2GIT_HEAD");
 427
 428         $forward_master =
 429             $opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
 430             system('cmp', '-s', "$git_dir/refs/heads/master",
 431                                 "$git_dir/refs/heads/$opt_o") == 0;
 432
 433         # populate index
 434         system('git-read-tree', $last_branch);
 435         die "read-tree failed: $?\n" if $?;
 436
 437         # Get the last import timestamps
 438         opendir(D,"$git_dir/refs/heads");
 439         while(defined(my $head = readdir(D))) {
 440                 next if $head =~ /^\./;
 441                 open(F,"$git_dir/refs/heads/$head")
 442                         or die "Bad head branch: $head: $!\n";
 443                 chomp(my $ftag = <F>);
 444                 close(F);
 445                 open(F,"git-cat-file commit $ftag |");
 446                 while(<F>) {
 447                         next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/;
 448                         $branch_date{$head} = $1;
 449                         last;
 450                 }
 451                 close(F);
 452         }
 453         closedir(D);
 454 }
 455
 456 -d $git_dir
 457         or die "Could not create git subdir ($git_dir).\n";
 458
 459 my $pid = open(CVS,"-|");
 460 die "Cannot fork: $!\n" unless defined $pid;
 461 unless($pid) {
 462         my @opt;
 463         @opt = split(/,/,$opt_p) if defined $opt_p;
 464         unshift @opt, '-z', $opt_z if defined $opt_z;
 465         exec("cvsps",@opt,"-u","-A","--cvs-direct",'--root',$opt_d,$cvs_tree);
 466         die "Could not start cvsps: $!\n";
 467 }
 468
 469
 470 ## cvsps output:
 471 #---------------------
 472 #PatchSet 314
 473 #Date: 1999/09/18 13:03:59
 474 #Author: wkoch
 475 #Branch: STABLE-BRANCH-1-0
 476 #Ancestor branch: HEAD
 477 #Tag: (none)
 478 #Log:
 479 #    See ChangeLog: Sat Sep 18 13:03:28 CEST 1999  Werner Koch
 480 #Members:
 481 #       README:1.57->1.57.2.1
 482 #       VERSION:1.96->1.96.2.1
 483 #
 484 #---------------------
 485
 486 my $state = 0;
 487
 488 my($patchset,$date,$author,$branch,$ancestor,$tag,$logmsg);
 489 my(@old,@new);
 490 my $commit = sub {
 491         my $pid;
 492         while(@old) {
 493                 my @o2;
 494                 if(@old > 55) {
 495                         @o2 = splice(@old,0,50);
 496                 } else {
 497                         @o2 = @old;
 498                         @old = ();
 499                 }
 500                 system("git-update-cache","--force-remove","--",@o2);
 501                 die "Cannot remove files: $?\n" if $?;
 502         }
 503         while(@new) {
 504                 my @n2;
 505                 if(@new > 12) {
 506                         @n2 = splice(@new,0,10);
 507                 } else {
 508                         @n2 = @new;
 509                         @new = ();
 510                 }
 511                 system("git-update-cache","--add",
 512                         (map { ('--cacheinfo', @$_) } @n2));
 513                 die "Cannot add files: $?\n" if $?;
 514         }
 515
 516         $pid = open(C,"-|");
 517         die "Cannot fork: $!" unless defined $pid;
 518         unless($pid) {
 519                 exec("git-write-tree");
 520                 die "Cannot exec git-write-tree: $!\n";
 521         }
 522         chomp(my $tree = <C>);
 523         length($tree) == 40
 524                 or die "Cannot get tree id ($tree): $!\n";
 525         close(C)
 526                 or die "Error running git-write-tree: $?\n";
 527         print "Tree ID $tree\n" if $opt_v;
 528
 529         my $parent = "";
 530         if(open(C,"$git_dir/refs/heads/$last_branch")) {
 531                 chomp($parent = <C>);
 532                 close(C);
 533                 length($parent) == 40
 534                         or die "Cannot get parent id ($parent): $!\n";
 535                 print "Parent ID $parent\n" if $opt_v;
 536         }
 537
 538         my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 539         my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 540         $pid = fork();
 541         die "Fork: $!\n" unless defined $pid;
 542         unless($pid) {
 543                 $pr->writer();
 544                 $pw->reader();
 545                 dup2($pw->fileno(),0);
 546                 dup2($pr->fileno(),1);
 547                 $pr->close();
 548                 $pw->close();
 549
 550                 my @par = ();
 551                 @par = ("-p",$parent) if $parent;
 552                 exec("env",
 553                         "GIT_AUTHOR_NAME=$author",
 554                         "GIT_AUTHOR_EMAIL=$author",
 555                         "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 556                         "GIT_COMMITTER_NAME=$author",
 557                         "GIT_COMMITTER_EMAIL=$author",
 558                         "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 559                         "git-commit-tree", $tree,@par);
 560                 die "Cannot exec git-commit-tree: $!\n";
 561         }
 562         $pw->writer();
 563         $pr->reader();
 564
 565         # compatibility with git2cvs
 566         substr($logmsg,32767) = "" if length($logmsg) > 32767;
 567         $logmsg =~ s/[\s\n]+\z//;
 568
 569         print $pw "$logmsg\n"
 570                 or die "Error writing to git-commit-tree: $!\n";
 571         $pw->close();
 572
 573         print "Committed patch $patchset ($branch ".strftime("%Y-%m-%d %H:%M:%S",gmtime($date)).")\n" if $opt_v;
 574         chomp(my $cid = <$pr>);
 575         length($cid) == 40
 576                 or die "Cannot get commit id ($cid): $!\n";
 577         print "Commit ID $cid\n" if $opt_v;
 578         $pr->close();
 579
 580         waitpid($pid,0);
 581         die "Error running git-commit-tree: $?\n" if $?;
 582
 583         open(C,">$git_dir/refs/heads/$branch")
 584                 or die "Cannot open branch $branch for update: $!\n";
 585         print C "$cid\n"
 586                 or die "Cannot write branch $branch for update: $!\n";
 587         close(C)
 588                 or die "Cannot write branch $branch for update: $!\n";
 589
 590         if($tag) {
 591                 open(C,">$git_dir/refs/tags/$tag")
 592                         or die "Cannot create tag $tag: $!\n";
 593                 print C "$cid\n"
 594                         or die "Cannot write tag $branch: $!\n";
 595                 close(C)
 596                         or die "Cannot write tag $branch: $!\n";
 597                 print "Created tag '$tag' on '$branch'\n" if $opt_v;
 598         }
 599 };
 600
 601 while(<CVS>) {
 602         chomp;
 603         if($state == 0 and /^-+$/) {
 604                 $state = 1;
 605         } elsif($state == 0) {
 606                 $state = 1;
 607                 redo;
 608         } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) {
 609                 $patchset = 0+$_;
 610                 $state=2;
 611         } elsif($state == 2 and s/^Date:\s+//) {
 612                 $date = pdate($_);
 613                 unless($date) {
 614                         print STDERR "Could not parse date: $_\n";
 615                         $state=0;
 616                         next;
 617                 }
 618                 $state=3;
 619         } elsif($state == 3 and s/^Author:\s+//) {
 620                 s/\s+$//;
 621                 $author = $_;
 622                 $state = 4;
 623         } elsif($state == 4 and s/^Branch:\s+//) {
 624                 s/\s+$//;
 625                 s/[\/]/$opt_s/g;
 626                 $branch = $_;
 627                 $state = 5;
 628         } elsif($state == 5 and s/^Ancestor branch:\s+//) {
 629                 s/\s+$//;
 630                 $ancestor = $_;
 631                 $ancestor = $opt_o if $ancestor eq "HEAD";
 632                 $state = 6;
 633         } elsif($state == 5) {
 634                 $ancestor = undef;
 635                 $state = 6;
 636                 redo;
 637         } elsif($state == 6 and s/^Tag:\s+//) {
 638                 s/\s+$//;
 639                 if($_ eq "(none)") {
 640                         $tag = undef;
 641                 } else {
 642                         $tag = $_;
 643                 }
 644                 $state = 7;
 645         } elsif($state == 7 and /^Log:/) {
 646                 $logmsg = "";
 647                 $state = 8;
 648         } elsif($state == 8 and /^Members:/) {
 649                 $branch = $opt_o if $branch eq "HEAD";
 650                 if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
 651                         # skip
 652                         print "skip patchset $patchset: $date before $branch_date{$branch}\n" if $opt_v;
 653                         $state = 11;
 654                         next;
 655                 }
 656                 if($ancestor) {
 657                         if(-f "$git_dir/refs/heads/$branch") {
 658                                 print STDERR "Branch $branch already exists!\n";
 659                                 $state=11;
 660                                 next;
 661                         }
 662                         unless(open(H,"$git_dir/refs/heads/$ancestor")) {
 663                                 print STDERR "Branch $ancestor does not exist!\n";
 664                                 $state=11;
 665                                 next;
 666                         }
 667                         chomp(my $id = <H>);
 668                         close(H);
 669                         unless(open(H,"> $git_dir/refs/heads/$branch")) {
 670                                 print STDERR "Could not create branch $branch: $!\n";
 671                                 $state=11;
 672                                 next;
 673                         }
 674                         print H "$id\n"
 675                                 or die "Could not write branch $branch: $!";
 676                         close(H)
 677                                 or die "Could not write branch $branch: $!";
 678                 }
 679                 if(($ancestor || $branch) ne $last_branch) {
 680                         print "Switching from $last_branch to $branch\n" if $opt_v;
 681                         system("git-read-tree", $branch);
 682                         die "read-tree failed: $?\n" if $?;
 683                 }
 684                 $last_branch = $branch if $branch ne $last_branch;
 685                 $state = 9;
 686         } elsif($state == 8) {
 687                 $logmsg .= "$_\n";
 688         } elsif($state == 9 and /^\s+(.+?):(INITIAL|\d+(?:\.\d+)+)->(\d+(?:\.\d+)+)\s*$/) {
 689 #       VERSION:1.96->1.96.2.1
 690                 my $init = ($2 eq "INITIAL");
 691                 my $fn = $1;
 692                 my $rev = $3;
 693                 $fn =~ s#^/+##;
 694                 my ($tmpname, $size) = $cvs->file($fn,$rev);
 695                 if($size == -1) {
 696                         push(@old,$fn);
 697                         print "Drop $fn\n" if $opt_v;
 698                 } else {
 699                         print "".($init ? "New" : "Update")." $fn: $size bytes\n" if $opt_v;
 700                         open my $F, '-|', "git-hash-object -w $tmpname"
 701                                 or die "Cannot create object: $!\n";
 702                         my $sha = <$F>;
 703                         chomp $sha;
 704                         close $F;
 705                         my $mode = pmode($cvs->{'mode'});
 706                         push(@new,[$mode, $sha, $fn]); # may be resurrected!
 707                 }
 708                 unlink($tmpname);
 709         } elsif($state == 9 and /^\s+(.+?):\d+(?:\.\d+)+->(\d+(?:\.\d+)+)\(DEAD\)\s*$/) {
 710                 my $fn = $1;
 711                 $fn =~ s#^/+##;
 712                 push(@old,$fn);
 713                 print "Delete $fn\n" if $opt_v;
 714         } elsif($state == 9 and /^\s*$/) {
 715                 $state = 10;
 716         } elsif(($state == 9 or $state == 10) and /^-+$/) {
 717                 &$commit();
 718                 $state = 1;
 719         } elsif($state == 11 and /^-+$/) {
 720                 $state = 1;
 721         } elsif(/^-+$/) { # end of unknown-line processing
 722                 $state = 1;
 723         } elsif($state != 11) { # ignore stuff when skipping
 724                 print "* UNKNOWN LINE * $_\n";
 725         }
 726 }
 727 &$commit() if $branch and $state != 11;
 728
 729 unlink($git_index);
 730
 731 if (defined $orig_git_index) {
 732         $ENV{GIT_INDEX_FILE} = $orig_git_index;
 733 } else {
 734         delete $ENV{GIT_INDEX_FILE};
 735 }
 736
 737 # Now switch back to the branch we were in before all of this happened
 738 if($orig_branch) {
 739         print "DONE\n" if $opt_v;
 740         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 741                 if $forward_master;
 742         unless ($opt_i) {
 743                 system('git-read-tree', '-m', '-u', 'CVS2GIT_HEAD', 'HEAD');
 744                 die "read-tree failed: $?\n" if $?;
 745         }
 746 } else {
 747         $orig_branch = "master";
 748         print "DONE; creating $orig_branch branch\n" if $opt_v;
 749         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 750                 unless -f "$git_dir/refs/heads/master";
 751         unlink("$git_dir/HEAD");
 752         symlink("refs/heads/$orig_branch","$git_dir/HEAD");
 753         unless ($opt_i) {
 754                 system('git checkout');
 755                 die "checkout failed: $?\n" if $?;
 756         }
 757 }
 758 unlink("$git_dir/CVS2GIT_HEAD");