contrib/git-svn: tell the user to not modify git-svn-HEAD directly
[git] / git-cvsimport.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 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 use IPC::Open2;
28
29 $SIG{'PIPE'}="IGNORE";
30 $ENV{'TZ'}="UTC";
31
32 our($opt_h,$opt_o,$opt_v,$opt_k,$opt_u,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_P, $opt_s,$opt_m,$opt_M,$opt_A,$opt_S);
33 my (%conv_author_name, %conv_author_email);
34
35 sub usage() {
36         print STDERR <<END;
37 Usage: ${\basename $0}     # fetch/update GIT from CVS
38        [-o branch-for-HEAD] [-h] [-v] [-d CVSROOT] [-A author-conv-file]
39        [-p opts-for-cvsps] [-C GIT_repository] [-z fuzz] [-i] [-k] [-u]
40        [-s subst] [-m] [-M regex] [-S regex] [CVS_module]
41 END
42         exit(1);
43 }
44
45 sub read_author_info($) {
46         my ($file) = @_;
47         my $user;
48         open my $f, '<', "$file" or die("Failed to open $file: $!\n");
49
50         while (<$f>) {
51                 # Expected format is this:
52                 #   exon=Andreas Ericsson <ae@op5.se>
53                 if (m/^(\S+?)\s*=\s*(.+?)\s*<(.+)>\s*$/) {
54                         $user = $1;
55                         $conv_author_name{$user} = $2;
56                         $conv_author_email{$user} = $3;
57                 }
58                 # However, we also read from CVSROOT/users format
59                 # to ease migration.
60                 elsif (/^(\w+):(['"]?)(.+?)\2\s*$/) {
61                         my $mapped;
62                         ($user, $mapped) = ($1, $3);
63                         if ($mapped =~ /^\s*(.*?)\s*<(.*)>\s*$/) {
64                                 $conv_author_name{$user} = $1;
65                                 $conv_author_email{$user} = $2;
66                         }
67                         elsif ($mapped =~ /^<?(.*)>?$/) {
68                                 $conv_author_name{$user} = $user;
69                                 $conv_author_email{$user} = $1;
70                         }
71                 }
72                 # NEEDSWORK: Maybe warn on unrecognized lines?
73         }
74         close ($f);
75 }
76
77 sub write_author_info($) {
78         my ($file) = @_;
79         open my $f, '>', $file or
80           die("Failed to open $file for writing: $!");
81
82         foreach (keys %conv_author_name) {
83                 print $f "$_=$conv_author_name{$_} <$conv_author_email{$_}>\n";
84         }
85         close ($f);
86 }
87
88 getopts("hivmkuo:d:p:C:z:s:M:P:A:S:") or usage();
89 usage if $opt_h;
90
91 @ARGV <= 1 or usage();
92
93 if($opt_d) {
94         $ENV{"CVSROOT"} = $opt_d;
95 } elsif(-f 'CVS/Root') {
96         open my $f, '<', 'CVS/Root' or die 'Failed to open CVS/Root';
97         $opt_d = <$f>;
98         chomp $opt_d;
99         close $f;
100         $ENV{"CVSROOT"} = $opt_d;
101 } elsif($ENV{"CVSROOT"}) {
102         $opt_d = $ENV{"CVSROOT"};
103 } else {
104         die "CVSROOT needs to be set";
105 }
106 $opt_o ||= "origin";
107 $opt_s ||= "-";
108 my $git_tree = $opt_C;
109 $git_tree ||= ".";
110
111 my $cvs_tree;
112 if ($#ARGV == 0) {
113         $cvs_tree = $ARGV[0];
114 } elsif (-f 'CVS/Repository') {
115         open my $f, '<', 'CVS/Repository' or 
116             die 'Failed to open CVS/Repository';
117         $cvs_tree = <$f>;
118         chomp $cvs_tree;
119         close $f;
120 } else {
121         usage();
122 }
123
124 our @mergerx = ();
125 if ($opt_m) {
126         @mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
127 }
128 if ($opt_M) {
129         push (@mergerx, qr/$opt_M/);
130 }
131
132 select(STDERR); $|=1; select(STDOUT);
133
134
135 package CVSconn;
136 # Basic CVS dialog.
137 # We're only interested in connecting and downloading, so ...
138
139 use File::Spec;
140 use File::Temp qw(tempfile);
141 use POSIX qw(strftime dup2);
142
143 sub new {
144         my($what,$repo,$subdir) = @_;
145         $what=ref($what) if ref($what);
146
147         my $self = {};
148         $self->{'buffer'} = "";
149         bless($self,$what);
150
151         $repo =~ s#/+$##;
152         $self->{'fullrep'} = $repo;
153         $self->conn();
154
155         $self->{'subdir'} = $subdir;
156         $self->{'lines'} = undef;
157
158         return $self;
159 }
160
161 sub conn {
162         my $self = shift;
163         my $repo = $self->{'fullrep'};
164         if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
165                 my($user,$pass,$serv,$port) = ($1,$2,$3,$4);
166                 $user="anonymous" unless defined $user;
167                 my $rr2 = "-";
168                 unless($port) {
169                         $rr2 = ":pserver:$user\@$serv:$repo";
170                         $port=2401;
171                 }
172                 my $rr = ":pserver:$user\@$serv:$port$repo";
173
174                 unless($pass) {
175                         open(H,$ENV{'HOME'}."/.cvspass") and do {
176                                 # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
177                                 while(<H>) {
178                                         chomp;
179                                         s/^\/\d+\s+//;
180                                         my ($w,$p) = split(/\s/,$_,2);
181                                         if($w eq $rr or $w eq $rr2) {
182                                                 $pass = $p;
183                                                 last;
184                                         }
185                                 }
186                         };
187                 }
188                 $pass="A" unless $pass;
189
190                 my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
191                 die "Socket to $serv: $!\n" unless defined $s;
192                 $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
193                         or die "Write to $serv: $!\n";
194                 $s->flush();
195
196                 my $rep = <$s>;
197
198                 if($rep ne "I LOVE YOU\n") {
199                         $rep="<unknown>" unless $rep;
200                         die "AuthReply: $rep\n";
201                 }
202                 $self->{'socketo'} = $s;
203                 $self->{'socketi'} = $s;
204         } else { # local or ext: Fork off our own cvs server.
205                 my $pr = IO::Pipe->new();
206                 my $pw = IO::Pipe->new();
207                 my $pid = fork();
208                 die "Fork: $!\n" unless defined $pid;
209                 my $cvs = 'cvs';
210                 $cvs = $ENV{CVS_SERVER} if exists $ENV{CVS_SERVER};
211                 my $rsh = 'rsh';
212                 $rsh = $ENV{CVS_RSH} if exists $ENV{CVS_RSH};
213
214                 my @cvs = ($cvs, 'server');
215                 my ($local, $user, $host);
216                 $local = $repo =~ s/:local://;
217                 if (!$local) {
218                     $repo =~ s/:ext://;
219                     $local = !($repo =~ s/^(?:([^\@:]+)\@)?([^:]+)://);
220                     ($user, $host) = ($1, $2);
221                 }
222                 if (!$local) {
223                     if ($user) {
224                         unshift @cvs, $rsh, '-l', $user, $host;
225                     } else {
226                         unshift @cvs, $rsh, $host;
227                     }
228                 }
229
230                 unless($pid) {
231                         $pr->writer();
232                         $pw->reader();
233                         dup2($pw->fileno(),0);
234                         dup2($pr->fileno(),1);
235                         $pr->close();
236                         $pw->close();
237                         exec(@cvs);
238                 }
239                 $pw->writer();
240                 $pr->reader();
241                 $self->{'socketo'} = $pw;
242                 $self->{'socketi'} = $pr;
243         }
244         $self->{'socketo'}->write("Root $repo\n");
245
246         # Trial and error says that this probably is the minimum set
247         $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E Checked-in Created Updated Merged Removed\n");
248
249         $self->{'socketo'}->write("valid-requests\n");
250         $self->{'socketo'}->flush();
251
252         chomp(my $rep=$self->readline());
253         if($rep !~ s/^Valid-requests\s*//) {
254                 $rep="<unknown>" unless $rep;
255                 die "Expected Valid-requests from server, but got: $rep\n";
256         }
257         chomp(my $res=$self->readline());
258         die "validReply: $res\n" if $res ne "ok";
259
260         $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
261         $self->{'repo'} = $repo;
262 }
263
264 sub readline {
265         my($self) = @_;
266         return $self->{'socketi'}->getline();
267 }
268
269 sub _file {
270         # Request a file with a given revision.
271         # Trial and error says this is a good way to do it. :-/
272         my($self,$fn,$rev) = @_;
273         $self->{'socketo'}->write("Argument -N\n") or return undef;
274         $self->{'socketo'}->write("Argument -P\n") or return undef;
275         # -kk: Linus' version doesn't use it - defaults to off
276         if ($opt_k) {
277             $self->{'socketo'}->write("Argument -kk\n") or return undef;
278         }
279         $self->{'socketo'}->write("Argument -r\n") or return undef;
280         $self->{'socketo'}->write("Argument $rev\n") or return undef;
281         $self->{'socketo'}->write("Argument --\n") or return undef;
282         $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
283         $self->{'socketo'}->write("Directory .\n") or return undef;
284         $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
285         # $self->{'socketo'}->write("Sticky T1.0\n") or return undef;
286         $self->{'socketo'}->write("co\n") or return undef;
287         $self->{'socketo'}->flush() or return undef;
288         $self->{'lines'} = 0;
289         return 1;
290 }
291 sub _line {
292         # Read a line from the server.
293         # ... except that 'line' may be an entire file. ;-)
294         my($self, $fh) = @_;
295         die "Not in lines" unless defined $self->{'lines'};
296
297         my $line;
298         my $res=0;
299         while(defined($line = $self->readline())) {
300                 # M U gnupg-cvs-rep/AUTHORS
301                 # Updated gnupg-cvs-rep/
302                 # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
303                 # /AUTHORS/1.1///T1.1
304                 # u=rw,g=rw,o=rw
305                 # 0
306                 # ok
307
308                 if($line =~ s/^(?:Created|Updated) //) {
309                         $line = $self->readline(); # path
310                         $line = $self->readline(); # Entries line
311                         my $mode = $self->readline(); chomp $mode;
312                         $self->{'mode'} = $mode;
313                         defined (my $cnt = $self->readline())
314                                 or die "EOF from server after 'Changed'\n";
315                         chomp $cnt;
316                         die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
317                         $line="";
318                         $res=0;
319                         while($cnt) {
320                                 my $buf;
321                                 my $num = $self->{'socketi'}->read($buf,$cnt);
322                                 die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
323                                 print $fh $buf;
324                                 $res += $num;
325                                 $cnt -= $num;
326                         }
327                 } elsif($line =~ s/^ //) {
328                         print $fh $line;
329                         $res += length($line);
330                 } elsif($line =~ /^M\b/) {
331                         # output, do nothing
332                 } elsif($line =~ /^Mbinary\b/) {
333                         my $cnt;
334                         die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
335                         chomp $cnt;
336                         die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
337                         $line="";
338                         while($cnt) {
339                                 my $buf;
340                                 my $num = $self->{'socketi'}->read($buf,$cnt);
341                                 die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0;
342                                 print $fh $buf;
343                                 $res += $num;
344                                 $cnt -= $num;
345                         }
346                 } else {
347                         chomp $line;
348                         if($line eq "ok") {
349                                 # print STDERR "S: ok (".length($res).")\n";
350                                 return $res;
351                         } elsif($line =~ s/^E //) {
352                                 # print STDERR "S: $line\n";
353                         } elsif($line =~ /^Remove-entry /i) {
354                                 $line = $self->readline(); # filename
355                                 $line = $self->readline(); # OK
356                                 chomp $line;
357                                 die "Unknown: $line" if $line ne "ok";
358                                 return -1;
359                         } else {
360                                 die "Unknown: $line\n";
361                         }
362                 }
363         }
364         return undef;
365 }
366 sub file {
367         my($self,$fn,$rev) = @_;
368         my $res;
369
370         my ($fh, $name) = tempfile('gitcvs.XXXXXX', 
371                     DIR => File::Spec->tmpdir(), UNLINK => 1);
372
373         $self->_file($fn,$rev) and $res = $self->_line($fh);
374
375         if (!defined $res) {
376             print STDERR "Server has gone away while fetching $fn $rev, retrying...\n";
377             truncate $fh, 0;
378             $self->conn();
379             $self->_file($fn,$rev) or die "No file command send";
380             $res = $self->_line($fh);
381             die "Retry failed" unless defined $res;
382         }
383         close ($fh);
384
385         return ($name, $res);
386 }
387
388
389 package main;
390
391 my $cvs = CVSconn->new($opt_d, $cvs_tree);
392
393
394 sub pdate($) {
395         my($d) = @_;
396         m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?#
397                 or die "Unparseable date: $d\n";
398         my $y=$1; $y-=1900 if $y>1900;
399         return timegm($6||0,$5,$4,$3,$2-1,$y);
400 }
401
402 sub pmode($) {
403         my($mode) = @_;
404         my $m = 0;
405         my $mm = 0;
406         my $um = 0;
407         for my $x(split(//,$mode)) {
408                 if($x eq ",") {
409                         $m |= $mm&$um;
410                         $mm = 0;
411                         $um = 0;
412                 } elsif($x eq "u") { $um |= 0700;
413                 } elsif($x eq "g") { $um |= 0070;
414                 } elsif($x eq "o") { $um |= 0007;
415                 } elsif($x eq "r") { $mm |= 0444;
416                 } elsif($x eq "w") { $mm |= 0222;
417                 } elsif($x eq "x") { $mm |= 0111;
418                 } elsif($x eq "=") { # do nothing
419                 } else { die "Unknown mode: $mode\n";
420                 }
421         }
422         $m |= $mm&$um;
423         return $m;
424 }
425
426 sub getwd() {
427         my $pwd = `pwd`;
428         chomp $pwd;
429         return $pwd;
430 }
431
432
433 sub get_headref($$) {
434     my $name    = shift;
435     my $git_dir = shift; 
436     my $sha;
437     
438     if (open(C,"$git_dir/refs/heads/$name")) {
439         chomp($sha = <C>);
440         close(C);
441         length($sha) == 40
442             or die "Cannot get head id for $name ($sha): $!\n";
443     }
444     return $sha;
445 }
446
447
448 -d $git_tree
449         or mkdir($git_tree,0777)
450         or die "Could not create $git_tree: $!";
451 chdir($git_tree);
452
453 my $last_branch = "";
454 my $orig_branch = "";
455 my $forward_master = 0;
456 my %branch_date;
457
458 my $git_dir = $ENV{"GIT_DIR"} || ".git";
459 $git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
460 $ENV{"GIT_DIR"} = $git_dir;
461 my $orig_git_index;
462 $orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
463 my ($git_ih, $git_index) = tempfile('gitXXXXXX', SUFFIX => '.idx',
464                                     DIR => File::Spec->tmpdir());
465 close ($git_ih);
466 $ENV{GIT_INDEX_FILE} = $git_index;
467 unless(-d $git_dir) {
468         system("git-init-db");
469         die "Cannot init the GIT db at $git_tree: $?\n" if $?;
470         system("git-read-tree");
471         die "Cannot init an empty tree: $?\n" if $?;
472
473         $last_branch = $opt_o;
474         $orig_branch = "";
475 } else {
476         -f "$git_dir/refs/heads/$opt_o"
477                 or die "Branch '$opt_o' does not exist.\n".
478                        "Either use the correct '-o branch' option,\n".
479                        "or import to a new repository.\n";
480
481         open(F, "git-symbolic-ref HEAD |") or
482                 die "Cannot run git-symbolic-ref: $!\n";
483         chomp ($last_branch = <F>);
484         $last_branch = basename($last_branch);
485         close(F);
486         unless($last_branch) {
487                 warn "Cannot read the last branch name: $! -- assuming 'master'\n";
488                 $last_branch = "master";
489         }
490         $orig_branch = $last_branch;
491         if (-f "$git_dir/CVS2GIT_HEAD") {
492                 die <<EOM;
493 CVS2GIT_HEAD exists.
494 Make sure your working directory corresponds to HEAD and remove CVS2GIT_HEAD.
495 You may need to run
496
497     git read-tree -m -u CVS2GIT_HEAD HEAD
498 EOM
499         }
500         system('cp', "$git_dir/HEAD", "$git_dir/CVS2GIT_HEAD");
501
502         $forward_master =
503             $opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
504             system('cmp', '-s', "$git_dir/refs/heads/master", 
505                                 "$git_dir/refs/heads/$opt_o") == 0;
506
507         # populate index
508         system('git-read-tree', $last_branch);
509         die "read-tree failed: $?\n" if $?;
510
511         # Get the last import timestamps
512         opendir(D,"$git_dir/refs/heads");
513         while(defined(my $head = readdir(D))) {
514                 next if $head =~ /^\./;
515                 open(F,"$git_dir/refs/heads/$head")
516                         or die "Bad head branch: $head: $!\n";
517                 chomp(my $ftag = <F>);
518                 close(F);
519                 open(F,"git-cat-file commit $ftag |");
520                 while(<F>) {
521                         next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/;
522                         $branch_date{$head} = $1;
523                         last;
524                 }
525                 close(F);
526         }
527         closedir(D);
528 }
529
530 -d $git_dir
531         or die "Could not create git subdir ($git_dir).\n";
532
533 # now we read (and possibly save) author-info as well
534 -f "$git_dir/cvs-authors" and
535   read_author_info("$git_dir/cvs-authors");
536 if ($opt_A) {
537         read_author_info($opt_A);
538         write_author_info("$git_dir/cvs-authors");
539 }
540
541 my $pid = open(CVS,"-|");
542 die "Cannot fork: $!\n" unless defined $pid;
543 unless($pid) {
544         my @opt;
545         @opt = split(/,/,$opt_p) if defined $opt_p;
546         unshift @opt, '-z', $opt_z if defined $opt_z;
547         unshift @opt, '-q'         unless defined $opt_v;
548         unless (defined($opt_p) && $opt_p =~ m/--no-cvs-direct/) {
549                 push @opt, '--cvs-direct';
550         }
551         if ($opt_P) {
552             exec("cat", $opt_P);
553         } else {
554             exec("cvsps","--norc",@opt,"-u","-A",'--root',$opt_d,$cvs_tree);
555             die "Could not start cvsps: $!\n";
556         }
557 }
558
559
560 ## cvsps output:
561 #---------------------
562 #PatchSet 314
563 #Date: 1999/09/18 13:03:59
564 #Author: wkoch
565 #Branch: STABLE-BRANCH-1-0
566 #Ancestor branch: HEAD
567 #Tag: (none)
568 #Log:
569 #    See ChangeLog: Sat Sep 18 13:03:28 CEST 1999  Werner Koch
570 #Members:
571 #       README:1.57->1.57.2.1
572 #       VERSION:1.96->1.96.2.1
573 #
574 #---------------------
575
576 my $state = 0;
577
578 my($patchset,$date,$author_name,$author_email,$branch,$ancestor,$tag,$logmsg);
579 my(@old,@new,@skipped);
580 my $commit = sub {
581         my $pid;
582         while(@old) {
583                 my @o2;
584                 if(@old > 55) {
585                         @o2 = splice(@old,0,50);
586                 } else {
587                         @o2 = @old;
588                         @old = ();
589                 }
590                 system("git-update-index","--force-remove","--",@o2);
591                 die "Cannot remove files: $?\n" if $?;
592         }
593         while(@new) {
594                 my @n2;
595                 if(@new > 12) {
596                         @n2 = splice(@new,0,10);
597                 } else {
598                         @n2 = @new;
599                         @new = ();
600                 }
601                 system("git-update-index","--add",
602                         (map { ('--cacheinfo', @$_) } @n2));
603                 die "Cannot add files: $?\n" if $?;
604         }
605
606         $pid = open(C,"-|");
607         die "Cannot fork: $!" unless defined $pid;
608         unless($pid) {
609                 exec("git-write-tree");
610                 die "Cannot exec git-write-tree: $!\n";
611         }
612         chomp(my $tree = <C>);
613         length($tree) == 40
614                 or die "Cannot get tree id ($tree): $!\n";
615         close(C)
616                 or die "Error running git-write-tree: $?\n";
617         print "Tree ID $tree\n" if $opt_v;
618
619         my $parent = "";
620         if(open(C,"$git_dir/refs/heads/$last_branch")) {
621                 chomp($parent = <C>);
622                 close(C);
623                 length($parent) == 40
624                         or die "Cannot get parent id ($parent): $!\n";
625                 print "Parent ID $parent\n" if $opt_v;
626         }
627
628         my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
629         my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
630         $pid = fork();
631         die "Fork: $!\n" unless defined $pid;
632         unless($pid) {
633                 $pr->writer();
634                 $pw->reader();
635                 open(OUT,">&STDOUT");
636                 dup2($pw->fileno(),0);
637                 dup2($pr->fileno(),1);
638                 $pr->close();
639                 $pw->close();
640
641                 my @par = ();
642                 @par = ("-p",$parent) if $parent;
643
644                 # loose detection of merges
645                 # based on the commit msg
646                 foreach my $rx (@mergerx) {
647                         if ($logmsg =~ $rx) {
648                                 my $mparent = $1;
649                                 if ($mparent eq 'HEAD') { $mparent = $opt_o };
650                                 if ( -e "$git_dir/refs/heads/$mparent") {
651                                         $mparent = get_headref($mparent, $git_dir);
652                                         push @par, '-p', $mparent;
653                                         print OUT "Merge parent branch: $mparent\n" if $opt_v;
654                                 }
655                         }
656                 }
657
658                 exec("env",
659                         "GIT_AUTHOR_NAME=$author_name",
660                         "GIT_AUTHOR_EMAIL=$author_email",
661                         "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
662                         "GIT_COMMITTER_NAME=$author_name",
663                         "GIT_COMMITTER_EMAIL=$author_email",
664                         "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
665                         "git-commit-tree", $tree,@par);
666                 die "Cannot exec git-commit-tree: $!\n";
667         }
668         $pw->writer();
669         $pr->reader();
670
671         # compatibility with git2cvs
672         substr($logmsg,32767) = "" if length($logmsg) > 32767;
673         $logmsg =~ s/[\s\n]+\z//;
674
675         if (@skipped) {
676             $logmsg .= "\n\n\nSKIPPED:\n\t";
677             $logmsg .= join("\n\t", @skipped) . "\n";
678         }
679
680         print $pw "$logmsg\n"
681                 or die "Error writing to git-commit-tree: $!\n";
682         $pw->close();
683
684         print "Committed patch $patchset ($branch ".strftime("%Y-%m-%d %H:%M:%S",gmtime($date)).")\n" if $opt_v;
685         chomp(my $cid = <$pr>);
686         length($cid) == 40
687                 or die "Cannot get commit id ($cid): $!\n";
688         print "Commit ID $cid\n" if $opt_v;
689         $pr->close();
690
691         waitpid($pid,0);
692         die "Error running git-commit-tree: $?\n" if $?;
693
694         open(C,">$git_dir/refs/heads/$branch")
695                 or die "Cannot open branch $branch for update: $!\n";
696         print C "$cid\n"
697                 or die "Cannot write branch $branch for update: $!\n";
698         close(C)
699                 or die "Cannot write branch $branch for update: $!\n";
700
701         if($tag) {
702                 my($in, $out) = ('','');
703                 my($xtag) = $tag;
704                 $xtag =~ s/\s+\*\*.*$//; # Remove stuff like ** INVALID ** and ** FUNKY **
705                 $xtag =~ tr/_/\./ if ( $opt_u );
706                 $xtag =~ s/[\/]/$opt_s/g;
707                 
708                 my $pid = open2($in, $out, 'git-mktag');
709                 print $out "object $cid\n".
710                     "type commit\n".
711                     "tag $xtag\n".
712                     "tagger $author_name <$author_email>\n"
713                     or die "Cannot create tag object $xtag: $!\n";
714                 close($out)
715                     or die "Cannot create tag object $xtag: $!\n";
716
717                 my $tagobj = <$in>;
718                 chomp $tagobj;
719
720                 if ( !close($in) or waitpid($pid, 0) != $pid or
721                      $? != 0 or $tagobj !~ /^[0123456789abcdef]{40}$/ ) {
722                     die "Cannot create tag object $xtag: $!\n";
723                 }
724                 
725
726                 open(C,">$git_dir/refs/tags/$xtag")
727                         or die "Cannot create tag $xtag: $!\n";
728                 print C "$tagobj\n"
729                         or die "Cannot write tag $xtag: $!\n";
730                 close(C)
731                         or die "Cannot write tag $xtag: $!\n";
732
733                 print "Created tag '$xtag' on '$branch'\n" if $opt_v;
734         }
735 };
736
737 while(<CVS>) {
738         chomp;
739         if($state == 0 and /^-+$/) {
740                 $state = 1;
741         } elsif($state == 0) {
742                 $state = 1;
743                 redo;
744         } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) {
745                 $patchset = 0+$_;
746                 $state=2;
747         } elsif($state == 2 and s/^Date:\s+//) {
748                 $date = pdate($_);
749                 unless($date) {
750                         print STDERR "Could not parse date: $_\n";
751                         $state=0;
752                         next;
753                 }
754                 $state=3;
755         } elsif($state == 3 and s/^Author:\s+//) {
756                 s/\s+$//;
757                 if (/^(.*?)\s+<(.*)>/) {
758                     ($author_name, $author_email) = ($1, $2);
759                 } elsif ($conv_author_name{$_}) {
760                         $author_name = $conv_author_name{$_};
761                         $author_email = $conv_author_email{$_};
762                 } else {
763                     $author_name = $author_email = $_;
764                 }
765                 $state = 4;
766         } elsif($state == 4 and s/^Branch:\s+//) {
767                 s/\s+$//;
768                 s/[\/]/$opt_s/g;
769                 $branch = $_;
770                 $state = 5;
771         } elsif($state == 5 and s/^Ancestor branch:\s+//) {
772                 s/\s+$//;
773                 $ancestor = $_;
774                 $ancestor = $opt_o if $ancestor eq "HEAD";
775                 $state = 6;
776         } elsif($state == 5) {
777                 $ancestor = undef;
778                 $state = 6;
779                 redo;
780         } elsif($state == 6 and s/^Tag:\s+//) {
781                 s/\s+$//;
782                 if($_ eq "(none)") {
783                         $tag = undef;
784                 } else {
785                         $tag = $_;
786                 }
787                 $state = 7;
788         } elsif($state == 7 and /^Log:/) {
789                 $logmsg = "";
790                 $state = 8;
791         } elsif($state == 8 and /^Members:/) {
792                 $branch = $opt_o if $branch eq "HEAD";
793                 if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
794                         # skip
795                         print "skip patchset $patchset: $date before $branch_date{$branch}\n" if $opt_v;
796                         $state = 11;
797                         next;
798                 }
799                 if($ancestor) {
800                         if(-f "$git_dir/refs/heads/$branch") {
801                                 print STDERR "Branch $branch already exists!\n";
802                                 $state=11;
803                                 next;
804                         }
805                         unless(open(H,"$git_dir/refs/heads/$ancestor")) {
806                                 print STDERR "Branch $ancestor does not exist!\n";
807                                 $state=11;
808                                 next;
809                         }
810                         chomp(my $id = <H>);
811                         close(H);
812                         unless(open(H,"> $git_dir/refs/heads/$branch")) {
813                                 print STDERR "Could not create branch $branch: $!\n";
814                                 $state=11;
815                                 next;
816                         }
817                         print H "$id\n"
818                                 or die "Could not write branch $branch: $!";
819                         close(H)
820                                 or die "Could not write branch $branch: $!";
821                 }
822                 if(($ancestor || $branch) ne $last_branch) {
823                         print "Switching from $last_branch to $branch\n" if $opt_v;
824                         system("git-read-tree", $branch);
825                         die "read-tree failed: $?\n" if $?;
826                 }
827                 $last_branch = $branch if $branch ne $last_branch;
828                 $state = 9;
829         } elsif($state == 8) {
830                 $logmsg .= "$_\n";
831         } elsif($state == 9 and /^\s+(.+?):(INITIAL|\d+(?:\.\d+)+)->(\d+(?:\.\d+)+)\s*$/) {
832 #       VERSION:1.96->1.96.2.1
833                 my $init = ($2 eq "INITIAL");
834                 my $fn = $1;
835                 my $rev = $3;
836                 $fn =~ s#^/+##;
837                 if ($opt_S && $fn =~ m/$opt_S/) {
838                     print "SKIPPING $fn v $rev\n";
839                     push(@skipped, $fn);
840                     next;
841                 }
842                 print "Fetching $fn   v $rev\n" if $opt_v;
843                 my ($tmpname, $size) = $cvs->file($fn,$rev);
844                 if($size == -1) {
845                         push(@old,$fn);
846                         print "Drop $fn\n" if $opt_v;
847                 } else {
848                         print "".($init ? "New" : "Update")." $fn: $size bytes\n" if $opt_v;
849                         my $pid = open(my $F, '-|');
850                         die $! unless defined $pid;
851                         if (!$pid) {
852                             exec("git-hash-object", "-w", $tmpname)
853                                 or die "Cannot create object: $!\n";
854                         }
855                         my $sha = <$F>;
856                         chomp $sha;
857                         close $F;
858                         my $mode = pmode($cvs->{'mode'});
859                         push(@new,[$mode, $sha, $fn]); # may be resurrected!
860                 }
861                 unlink($tmpname);
862         } elsif($state == 9 and /^\s+(.+?):\d+(?:\.\d+)+->(\d+(?:\.\d+)+)\(DEAD\)\s*$/) {
863                 my $fn = $1;
864                 $fn =~ s#^/+##;
865                 push(@old,$fn);
866                 print "Delete $fn\n" if $opt_v;
867         } elsif($state == 9 and /^\s*$/) {
868                 $state = 10;
869         } elsif(($state == 9 or $state == 10) and /^-+$/) {
870                 &$commit();
871                 $state = 1;
872         } elsif($state == 11 and /^-+$/) {
873                 $state = 1;
874         } elsif(/^-+$/) { # end of unknown-line processing
875                 $state = 1;
876         } elsif($state != 11) { # ignore stuff when skipping
877                 print "* UNKNOWN LINE * $_\n";
878         }
879 }
880 &$commit() if $branch and $state != 11;
881
882 unlink($git_index);
883
884 if (defined $orig_git_index) {
885         $ENV{GIT_INDEX_FILE} = $orig_git_index;
886 } else {
887         delete $ENV{GIT_INDEX_FILE};
888 }
889
890 # Now switch back to the branch we were in before all of this happened
891 if($orig_branch) {
892         print "DONE\n" if $opt_v;
893         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
894                 if $forward_master;
895         unless ($opt_i) {
896                 system('git-read-tree', '-m', '-u', 'CVS2GIT_HEAD', 'HEAD');
897                 die "read-tree failed: $?\n" if $?;
898         }
899 } else {
900         $orig_branch = "master";
901         print "DONE; creating $orig_branch branch\n" if $opt_v;
902         system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
903                 unless -f "$git_dir/refs/heads/master";
904         system('git-update-ref', 'HEAD', "$orig_branch");
905         unless ($opt_i) {
906                 system('git checkout');
907                 die "checkout failed: $?\n" if $?;
908         }
909 }
910 unlink("$git_dir/CVS2GIT_HEAD");