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