Andrew's git / gitweb.git / git-cvsimport.perl
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git-cvsimport.perlon commit Merge http://www.kernel.org/pub/scm/gitk/gitk (3eeb419)
   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
  16use strict;
  17use warnings;
  18use Getopt::Std;
  19use File::Spec;
  20use File::Temp qw(tempfile);
  21use File::Path qw(mkpath);
  22use File::Basename qw(basename dirname);
  23use Time::Local;
  24use IO::Socket;
  25use IO::Pipe;
  26use POSIX qw(strftime dup2);
  27use IPC::Open2;
  28
  29$SIG{'PIPE'}="IGNORE";
  30$ENV{'TZ'}="UTC";
  31
  32our($opt_h,$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);
  33
  34sub usage() {
  35        print STDERR <<END;
  36Usage: ${\basename $0}     # fetch/update GIT from CVS
  37       [-o branch-for-HEAD] [-h] [-v] [-d CVSROOT]
  38       [-p opts-for-cvsps] [-C GIT_repository] [-z fuzz]
  39       [-i] [-k] [-u] [-s subst] [-m] [-M regex] [CVS_module]
  40END
  41        exit(1);
  42}
  43
  44getopts("hivmkuo:d:p:C:z:s:M:P:") or usage();
  45usage if $opt_h;
  46
  47@ARGV <= 1 or usage();
  48
  49if($opt_d) {
  50        $ENV{"CVSROOT"} = $opt_d;
  51} elsif(-f 'CVS/Root') {
  52        open my $f, '<', 'CVS/Root' or die 'Failed to open CVS/Root';
  53        $opt_d = <$f>;
  54        chomp $opt_d;
  55        close $f;
  56        $ENV{"CVSROOT"} = $opt_d;
  57} elsif($ENV{"CVSROOT"}) {
  58        $opt_d = $ENV{"CVSROOT"};
  59} else {
  60        die "CVSROOT needs to be set";
  61}
  62$opt_o ||= "origin";
  63$opt_s ||= "-";
  64my $git_tree = $opt_C;
  65$git_tree ||= ".";
  66
  67my $cvs_tree;
  68if ($#ARGV == 0) {
  69        $cvs_tree = $ARGV[0];
  70} elsif (-f 'CVS/Repository') {
  71        open my $f, '<', 'CVS/Repository' or 
  72            die 'Failed to open CVS/Repository';
  73        $cvs_tree = <$f>;
  74        chomp $cvs_tree;
  75        close $f;
  76} else {
  77        usage();
  78}
  79
  80our @mergerx = ();
  81if ($opt_m) {
  82        @mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
  83}
  84if ($opt_M) {
  85        push (@mergerx, qr/$opt_M/);
  86}
  87
  88select(STDERR); $|=1; select(STDOUT);
  89
  90
  91package CVSconn;
  92# Basic CVS dialog.
  93# We're only interested in connecting and downloading, so ...
  94
  95use File::Spec;
  96use File::Temp qw(tempfile);
  97use POSIX qw(strftime dup2);
  98
  99sub new {
 100        my($what,$repo,$subdir) = @_;
 101        $what=ref($what) if ref($what);
 102
 103        my $self = {};
 104        $self->{'buffer'} = "";
 105        bless($self,$what);
 106
 107        $repo =~ s#/+$##;
 108        $self->{'fullrep'} = $repo;
 109        $self->conn();
 110
 111        $self->{'subdir'} = $subdir;
 112        $self->{'lines'} = undef;
 113
 114        return $self;
 115}
 116
 117sub conn {
 118        my $self = shift;
 119        my $repo = $self->{'fullrep'};
 120        if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
 121                my($user,$pass,$serv,$port) = ($1,$2,$3,$4);
 122                $user="anonymous" unless defined $user;
 123                my $rr2 = "-";
 124                unless($port) {
 125                        $rr2 = ":pserver:$user\@$serv:$repo";
 126                        $port=2401;
 127                }
 128                my $rr = ":pserver:$user\@$serv:$port$repo";
 129
 130                unless($pass) {
 131                        open(H,$ENV{'HOME'}."/.cvspass") and do {
 132                                # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
 133                                while(<H>) {
 134                                        chomp;
 135                                        s/^\/\d+\s+//;
 136                                        my ($w,$p) = split(/\s/,$_,2);
 137                                        if($w eq $rr or $w eq $rr2) {
 138                                                $pass = $p;
 139                                                last;
 140                                        }
 141                                }
 142                        };
 143                }
 144                $pass="A" unless $pass;
 145
 146                my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
 147                die "Socket to $serv: $!\n" unless defined $s;
 148                $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
 149                        or die "Write to $serv: $!\n";
 150                $s->flush();
 151
 152                my $rep = <$s>;
 153
 154                if($rep ne "I LOVE YOU\n") {
 155                        $rep="<unknown>" unless $rep;
 156                        die "AuthReply: $rep\n";
 157                }
 158                $self->{'socketo'} = $s;
 159                $self->{'socketi'} = $s;
 160        } else { # local or ext: Fork off our own cvs server.
 161                my $pr = IO::Pipe->new();
 162                my $pw = IO::Pipe->new();
 163                my $pid = fork();
 164                die "Fork: $!\n" unless defined $pid;
 165                my $cvs = 'cvs';
 166                $cvs = $ENV{CVS_SERVER} if exists $ENV{CVS_SERVER};
 167                my $rsh = 'rsh';
 168                $rsh = $ENV{CVS_RSH} if exists $ENV{CVS_RSH};
 169
 170                my @cvs = ($cvs, 'server');
 171                my ($local, $user, $host);
 172                $local = $repo =~ s/:local://;
 173                if (!$local) {
 174                    $repo =~ s/:ext://;
 175                    $local = !($repo =~ s/^(?:([^\@:]+)\@)?([^:]+)://);
 176                    ($user, $host) = ($1, $2);
 177                }
 178                if (!$local) {
 179                    if ($user) {
 180                        unshift @cvs, $rsh, '-l', $user, $host;
 181                    } else {
 182                        unshift @cvs, $rsh, $host;
 183                    }
 184                }
 185
 186                unless($pid) {
 187                        $pr->writer();
 188                        $pw->reader();
 189                        dup2($pw->fileno(),0);
 190                        dup2($pr->fileno(),1);
 191                        $pr->close();
 192                        $pw->close();
 193                        exec(@cvs);
 194                }
 195                $pw->writer();
 196                $pr->reader();
 197                $self->{'socketo'} = $pw;
 198                $self->{'socketi'} = $pr;
 199        }
 200        $self->{'socketo'}->write("Root $repo\n");
 201
 202        # Trial and error says that this probably is the minimum set
 203        $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E Checked-in Created Updated Merged Removed\n");
 204
 205        $self->{'socketo'}->write("valid-requests\n");
 206        $self->{'socketo'}->flush();
 207
 208        chomp(my $rep=$self->readline());
 209        if($rep !~ s/^Valid-requests\s*//) {
 210                $rep="<unknown>" unless $rep;
 211                die "Expected Valid-requests from server, but got: $rep\n";
 212        }
 213        chomp(my $res=$self->readline());
 214        die "validReply: $res\n" if $res ne "ok";
 215
 216        $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
 217        $self->{'repo'} = $repo;
 218}
 219
 220sub readline {
 221        my($self) = @_;
 222        return $self->{'socketi'}->getline();
 223}
 224
 225sub _file {
 226        # Request a file with a given revision.
 227        # Trial and error says this is a good way to do it. :-/
 228        my($self,$fn,$rev) = @_;
 229        $self->{'socketo'}->write("Argument -N\n") or return undef;
 230        $self->{'socketo'}->write("Argument -P\n") or return undef;
 231        # -kk: Linus' version doesn't use it - defaults to off
 232        if ($opt_k) {
 233            $self->{'socketo'}->write("Argument -kk\n") or return undef;
 234        }
 235        $self->{'socketo'}->write("Argument -r\n") or return undef;
 236        $self->{'socketo'}->write("Argument $rev\n") or return undef;
 237        $self->{'socketo'}->write("Argument --\n") or return undef;
 238        $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
 239        $self->{'socketo'}->write("Directory .\n") or return undef;
 240        $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
 241        # $self->{'socketo'}->write("Sticky T1.0\n") or return undef;
 242        $self->{'socketo'}->write("co\n") or return undef;
 243        $self->{'socketo'}->flush() or return undef;
 244        $self->{'lines'} = 0;
 245        return 1;
 246}
 247sub _line {
 248        # Read a line from the server.
 249        # ... except that 'line' may be an entire file. ;-)
 250        my($self, $fh) = @_;
 251        die "Not in lines" unless defined $self->{'lines'};
 252
 253        my $line;
 254        my $res=0;
 255        while(defined($line = $self->readline())) {
 256                # M U gnupg-cvs-rep/AUTHORS
 257                # Updated gnupg-cvs-rep/
 258                # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
 259                # /AUTHORS/1.1///T1.1
 260                # u=rw,g=rw,o=rw
 261                # 0
 262                # ok
 263
 264                if($line =~ s/^(?:Created|Updated) //) {
 265                        $line = $self->readline(); # path
 266                        $line = $self->readline(); # Entries line
 267                        my $mode = $self->readline(); chomp $mode;
 268                        $self->{'mode'} = $mode;
 269                        defined (my $cnt = $self->readline())
 270                                or die "EOF from server after 'Changed'\n";
 271                        chomp $cnt;
 272                        die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
 273                        $line="";
 274                        $res=0;
 275                        while($cnt) {
 276                                my $buf;
 277                                my $num = $self->{'socketi'}->read($buf,$cnt);
 278                                die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
 279                                print $fh $buf;
 280                                $res += $num;
 281                                $cnt -= $num;
 282                        }
 283                } elsif($line =~ s/^ //) {
 284                        print $fh $line;
 285                        $res += length($line);
 286                } elsif($line =~ /^M\b/) {
 287                        # output, do nothing
 288                } elsif($line =~ /^Mbinary\b/) {
 289                        my $cnt;
 290                        die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
 291                        chomp $cnt;
 292                        die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
 293                        $line="";
 294                        while($cnt) {
 295                                my $buf;
 296                                my $num = $self->{'socketi'}->read($buf,$cnt);
 297                                die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0;
 298                                print $fh $buf;
 299                                $res += $num;
 300                                $cnt -= $num;
 301                        }
 302                } else {
 303                        chomp $line;
 304                        if($line eq "ok") {
 305                                # print STDERR "S: ok (".length($res).")\n";
 306                                return $res;
 307                        } elsif($line =~ s/^E //) {
 308                                # print STDERR "S: $line\n";
 309                        } elsif($line =~ /^Remove-entry /i) {
 310                                $line = $self->readline(); # filename
 311                                $line = $self->readline(); # OK
 312                                chomp $line;
 313                                die "Unknown: $line" if $line ne "ok";
 314                                return -1;
 315                        } else {
 316                                die "Unknown: $line\n";
 317                        }
 318                }
 319        }
 320}
 321sub file {
 322        my($self,$fn,$rev) = @_;
 323        my $res;
 324
 325        my ($fh, $name) = tempfile('gitcvs.XXXXXX', 
 326                    DIR => File::Spec->tmpdir(), UNLINK => 1);
 327
 328        $self->_file($fn,$rev) and $res = $self->_line($fh);
 329
 330        if (!defined $res) {
 331            # retry
 332            $self->conn();
 333            $self->_file($fn,$rev)
 334                    or die "No file command send\n";
 335            $res = $self->_line($fh);
 336            die "No input: $fn $rev\n" unless defined $res;
 337        }
 338        close ($fh);
 339
 340        if ($res eq '') {
 341            die "Looks like the server has gone away while fetching $fn $rev -- exiting!";
 342        }
 343
 344        return ($name, $res);
 345}
 346
 347
 348package main;
 349
 350my $cvs = CVSconn->new($opt_d, $cvs_tree);
 351
 352
 353sub pdate($) {
 354        my($d) = @_;
 355        m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?#
 356                or die "Unparseable date: $d\n";
 357        my $y=$1; $y-=1900 if $y>1900;
 358        return timegm($6||0,$5,$4,$3,$2-1,$y);
 359}
 360
 361sub pmode($) {
 362        my($mode) = @_;
 363        my $m = 0;
 364        my $mm = 0;
 365        my $um = 0;
 366        for my $x(split(//,$mode)) {
 367                if($x eq ",") {
 368                        $m |= $mm&$um;
 369                        $mm = 0;
 370                        $um = 0;
 371                } elsif($x eq "u") { $um |= 0700;
 372                } elsif($x eq "g") { $um |= 0070;
 373                } elsif($x eq "o") { $um |= 0007;
 374                } elsif($x eq "r") { $mm |= 0444;
 375                } elsif($x eq "w") { $mm |= 0222;
 376                } elsif($x eq "x") { $mm |= 0111;
 377                } elsif($x eq "=") { # do nothing
 378                } else { die "Unknown mode: $mode\n";
 379                }
 380        }
 381        $m |= $mm&$um;
 382        return $m;
 383}
 384
 385sub getwd() {
 386        my $pwd = `pwd`;
 387        chomp $pwd;
 388        return $pwd;
 389}
 390
 391
 392sub get_headref($$) {
 393    my $name    = shift;
 394    my $git_dir = shift; 
 395    my $sha;
 396    
 397    if (open(C,"$git_dir/refs/heads/$name")) {
 398        chomp($sha = <C>);
 399        close(C);
 400        length($sha) == 40
 401            or die "Cannot get head id for $name ($sha): $!\n";
 402    }
 403    return $sha;
 404}
 405
 406
 407-d $git_tree
 408        or mkdir($git_tree,0777)
 409        or die "Could not create $git_tree: $!";
 410chdir($git_tree);
 411
 412my $last_branch = "";
 413my $orig_branch = "";
 414my $forward_master = 0;
 415my %branch_date;
 416
 417my $git_dir = $ENV{"GIT_DIR"} || ".git";
 418$git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
 419$ENV{"GIT_DIR"} = $git_dir;
 420my $orig_git_index;
 421$orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
 422my ($git_ih, $git_index) = tempfile('gitXXXXXX', SUFFIX => '.idx',
 423                                    DIR => File::Spec->tmpdir());
 424close ($git_ih);
 425$ENV{GIT_INDEX_FILE} = $git_index;
 426unless(-d $git_dir) {
 427        system("git-init-db");
 428        die "Cannot init the GIT db at $git_tree: $?\n" if $?;
 429        system("git-read-tree");
 430        die "Cannot init an empty tree: $?\n" if $?;
 431
 432        $last_branch = $opt_o;
 433        $orig_branch = "";
 434} else {
 435        -f "$git_dir/refs/heads/$opt_o"
 436                or die "Branch '$opt_o' does not exist.\n".
 437                       "Either use the correct '-o branch' option,\n".
 438                       "or import to a new repository.\n";
 439
 440        open(F, "git-symbolic-ref HEAD |") or
 441                die "Cannot run git-symbolic-ref: $!\n";
 442        chomp ($last_branch = <F>);
 443        $last_branch = basename($last_branch);
 444        close(F);
 445        unless($last_branch) {
 446                warn "Cannot read the last branch name: $! -- assuming 'master'\n";
 447                $last_branch = "master";
 448        }
 449        $orig_branch = $last_branch;
 450        if (-f "$git_dir/CVS2GIT_HEAD") {
 451                die <<EOM;
 452CVS2GIT_HEAD exists.
 453Make sure your working directory corresponds to HEAD and remove CVS2GIT_HEAD.
 454You may need to run
 455
 456    git-read-tree -m -u CVS2GIT_HEAD HEAD
 457EOM
 458        }
 459        system('cp', "$git_dir/HEAD", "$git_dir/CVS2GIT_HEAD");
 460
 461        $forward_master =
 462            $opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
 463            system('cmp', '-s', "$git_dir/refs/heads/master", 
 464                                "$git_dir/refs/heads/$opt_o") == 0;
 465
 466        # populate index
 467        system('git-read-tree', $last_branch);
 468        die "read-tree failed: $?\n" if $?;
 469
 470        # Get the last import timestamps
 471        opendir(D,"$git_dir/refs/heads");
 472        while(defined(my $head = readdir(D))) {
 473                next if $head =~ /^\./;
 474                open(F,"$git_dir/refs/heads/$head")
 475                        or die "Bad head branch: $head: $!\n";
 476                chomp(my $ftag = <F>);
 477                close(F);
 478                open(F,"git-cat-file commit $ftag |");
 479                while(<F>) {
 480                        next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/;
 481                        $branch_date{$head} = $1;
 482                        last;
 483                }
 484                close(F);
 485        }
 486        closedir(D);
 487}
 488
 489-d $git_dir
 490        or die "Could not create git subdir ($git_dir).\n";
 491
 492my $pid = open(CVS,"-|");
 493die "Cannot fork: $!\n" unless defined $pid;
 494unless($pid) {
 495        my @opt;
 496        @opt = split(/,/,$opt_p) if defined $opt_p;
 497        unshift @opt, '-z', $opt_z if defined $opt_z;
 498        unshift @opt, '-q'         unless defined $opt_v;
 499        unless (defined($opt_p) && $opt_p =~ m/--no-cvs-direct/) {
 500                push @opt, '--cvs-direct';
 501        }
 502        if ($opt_P) {
 503            exec("cat", $opt_P);
 504        } else {
 505            exec("cvsps",@opt,"-u","-A",'--root',$opt_d,$cvs_tree);
 506            die "Could not start cvsps: $!\n";
 507        }
 508}
 509
 510
 511## cvsps output:
 512#---------------------
 513#PatchSet 314
 514#Date: 1999/09/18 13:03:59
 515#Author: wkoch
 516#Branch: STABLE-BRANCH-1-0
 517#Ancestor branch: HEAD
 518#Tag: (none)
 519#Log:
 520#    See ChangeLog: Sat Sep 18 13:03:28 CEST 1999  Werner Koch
 521#Members:
 522#       README:1.57->1.57.2.1
 523#       VERSION:1.96->1.96.2.1
 524#
 525#---------------------
 526
 527my $state = 0;
 528
 529my($patchset,$date,$author_name,$author_email,$branch,$ancestor,$tag,$logmsg);
 530my(@old,@new);
 531my $commit = sub {
 532        my $pid;
 533        while(@old) {
 534                my @o2;
 535                if(@old > 55) {
 536                        @o2 = splice(@old,0,50);
 537                } else {
 538                        @o2 = @old;
 539                        @old = ();
 540                }
 541                system("git-update-index","--force-remove","--",@o2);
 542                die "Cannot remove files: $?\n" if $?;
 543        }
 544        while(@new) {
 545                my @n2;
 546                if(@new > 12) {
 547                        @n2 = splice(@new,0,10);
 548                } else {
 549                        @n2 = @new;
 550                        @new = ();
 551                }
 552                system("git-update-index","--add",
 553                        (map { ('--cacheinfo', @$_) } @n2));
 554                die "Cannot add files: $?\n" if $?;
 555        }
 556
 557        $pid = open(C,"-|");
 558        die "Cannot fork: $!" unless defined $pid;
 559        unless($pid) {
 560                exec("git-write-tree");
 561                die "Cannot exec git-write-tree: $!\n";
 562        }
 563        chomp(my $tree = <C>);
 564        length($tree) == 40
 565                or die "Cannot get tree id ($tree): $!\n";
 566        close(C)
 567                or die "Error running git-write-tree: $?\n";
 568        print "Tree ID $tree\n" if $opt_v;
 569
 570        my $parent = "";
 571        if(open(C,"$git_dir/refs/heads/$last_branch")) {
 572                chomp($parent = <C>);
 573                close(C);
 574                length($parent) == 40
 575                        or die "Cannot get parent id ($parent): $!\n";
 576                print "Parent ID $parent\n" if $opt_v;
 577        }
 578
 579        my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 580        my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 581        $pid = fork();
 582        die "Fork: $!\n" unless defined $pid;
 583        unless($pid) {
 584                $pr->writer();
 585                $pw->reader();
 586                open(OUT,">&STDOUT");
 587                dup2($pw->fileno(),0);
 588                dup2($pr->fileno(),1);
 589                $pr->close();
 590                $pw->close();
 591
 592                my @par = ();
 593                @par = ("-p",$parent) if $parent;
 594
 595                # loose detection of merges
 596                # based on the commit msg
 597                foreach my $rx (@mergerx) {
 598                        if ($logmsg =~ $rx) {
 599                                my $mparent = $1;
 600                                if ($mparent eq 'HEAD') { $mparent = $opt_o };
 601                                if ( -e "$git_dir/refs/heads/$mparent") {
 602                                        $mparent = get_headref($mparent, $git_dir);
 603                                        push @par, '-p', $mparent;
 604                                        print OUT "Merge parent branch: $mparent\n" if $opt_v;
 605                                }
 606                        }
 607                }
 608
 609                exec("env",
 610                        "GIT_AUTHOR_NAME=$author_name",
 611                        "GIT_AUTHOR_EMAIL=$author_email",
 612                        "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 613                        "GIT_COMMITTER_NAME=$author_name",
 614                        "GIT_COMMITTER_EMAIL=$author_email",
 615                        "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 616                        "git-commit-tree", $tree,@par);
 617                die "Cannot exec git-commit-tree: $!\n";
 618        }
 619        $pw->writer();
 620        $pr->reader();
 621
 622        # compatibility with git2cvs
 623        substr($logmsg,32767) = "" if length($logmsg) > 32767;
 624        $logmsg =~ s/[\s\n]+\z//;
 625
 626        print $pw "$logmsg\n"
 627                or die "Error writing to git-commit-tree: $!\n";
 628        $pw->close();
 629
 630        print "Committed patch $patchset ($branch ".strftime("%Y-%m-%d %H:%M:%S",gmtime($date)).")\n" if $opt_v;
 631        chomp(my $cid = <$pr>);
 632        length($cid) == 40
 633                or die "Cannot get commit id ($cid): $!\n";
 634        print "Commit ID $cid\n" if $opt_v;
 635        $pr->close();
 636
 637        waitpid($pid,0);
 638        die "Error running git-commit-tree: $?\n" if $?;
 639
 640        open(C,">$git_dir/refs/heads/$branch")
 641                or die "Cannot open branch $branch for update: $!\n";
 642        print C "$cid\n"
 643                or die "Cannot write branch $branch for update: $!\n";
 644        close(C)
 645                or die "Cannot write branch $branch for update: $!\n";
 646
 647        if($tag) {
 648                my($in, $out) = ('','');
 649                my($xtag) = $tag;
 650                $xtag =~ s/\s+\*\*.*$//; # Remove stuff like ** INVALID ** and ** FUNKY **
 651                $xtag =~ tr/_/\./ if ( $opt_u );
 652                
 653                my $pid = open2($in, $out, 'git-mktag');
 654                print $out "object $cid\n".
 655                    "type commit\n".
 656                    "tag $xtag\n".
 657                    "tagger $author_name <$author_email>\n"
 658                    or die "Cannot create tag object $xtag: $!\n";
 659                close($out)
 660                    or die "Cannot create tag object $xtag: $!\n";
 661
 662                my $tagobj = <$in>;
 663                chomp $tagobj;
 664
 665                if ( !close($in) or waitpid($pid, 0) != $pid or
 666                     $? != 0 or $tagobj !~ /^[0123456789abcdef]{40}$/ ) {
 667                    die "Cannot create tag object $xtag: $!\n";
 668                }
 669                
 670
 671                open(C,">$git_dir/refs/tags/$xtag")
 672                        or die "Cannot create tag $xtag: $!\n";
 673                print C "$tagobj\n"
 674                        or die "Cannot write tag $xtag: $!\n";
 675                close(C)
 676                        or die "Cannot write tag $xtag: $!\n";
 677
 678                print "Created tag '$xtag' on '$branch'\n" if $opt_v;
 679        }
 680};
 681
 682while(<CVS>) {
 683        chomp;
 684        if($state == 0 and /^-+$/) {
 685                $state = 1;
 686        } elsif($state == 0) {
 687                $state = 1;
 688                redo;
 689        } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) {
 690                $patchset = 0+$_;
 691                $state=2;
 692        } elsif($state == 2 and s/^Date:\s+//) {
 693                $date = pdate($_);
 694                unless($date) {
 695                        print STDERR "Could not parse date: $_\n";
 696                        $state=0;
 697                        next;
 698                }
 699                $state=3;
 700        } elsif($state == 3 and s/^Author:\s+//) {
 701                s/\s+$//;
 702                if (/^(.*?)\s+<(.*)>/) {
 703                    ($author_name, $author_email) = ($1, $2);
 704                } else {
 705                    $author_name = $author_email = $_;
 706                }
 707                $state = 4;
 708        } elsif($state == 4 and s/^Branch:\s+//) {
 709                s/\s+$//;
 710                s/[\/]/$opt_s/g;
 711                $branch = $_;
 712                $state = 5;
 713        } elsif($state == 5 and s/^Ancestor branch:\s+//) {
 714                s/\s+$//;
 715                $ancestor = $_;
 716                $ancestor = $opt_o if $ancestor eq "HEAD";
 717                $state = 6;
 718        } elsif($state == 5) {
 719                $ancestor = undef;
 720                $state = 6;
 721                redo;
 722        } elsif($state == 6 and s/^Tag:\s+//) {
 723                s/\s+$//;
 724                if($_ eq "(none)") {
 725                        $tag = undef;
 726                } else {
 727                        $tag = $_;
 728                }
 729                $state = 7;
 730        } elsif($state == 7 and /^Log:/) {
 731                $logmsg = "";
 732                $state = 8;
 733        } elsif($state == 8 and /^Members:/) {
 734                $branch = $opt_o if $branch eq "HEAD";
 735                if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
 736                        # skip
 737                        print "skip patchset $patchset: $date before $branch_date{$branch}\n" if $opt_v;
 738                        $state = 11;
 739                        next;
 740                }
 741                if($ancestor) {
 742                        if(-f "$git_dir/refs/heads/$branch") {
 743                                print STDERR "Branch $branch already exists!\n";
 744                                $state=11;
 745                                next;
 746                        }
 747                        unless(open(H,"$git_dir/refs/heads/$ancestor")) {
 748                                print STDERR "Branch $ancestor does not exist!\n";
 749                                $state=11;
 750                                next;
 751                        }
 752                        chomp(my $id = <H>);
 753                        close(H);
 754                        unless(open(H,"> $git_dir/refs/heads/$branch")) {
 755                                print STDERR "Could not create branch $branch: $!\n";
 756                                $state=11;
 757                                next;
 758                        }
 759                        print H "$id\n"
 760                                or die "Could not write branch $branch: $!";
 761                        close(H)
 762                                or die "Could not write branch $branch: $!";
 763                }
 764                if(($ancestor || $branch) ne $last_branch) {
 765                        print "Switching from $last_branch to $branch\n" if $opt_v;
 766                        system("git-read-tree", $branch);
 767                        die "read-tree failed: $?\n" if $?;
 768                }
 769                $last_branch = $branch if $branch ne $last_branch;
 770                $state = 9;
 771        } elsif($state == 8) {
 772                $logmsg .= "$_\n";
 773        } elsif($state == 9 and /^\s+(.+?):(INITIAL|\d+(?:\.\d+)+)->(\d+(?:\.\d+)+)\s*$/) {
 774#       VERSION:1.96->1.96.2.1
 775                my $init = ($2 eq "INITIAL");
 776                my $fn = $1;
 777                my $rev = $3;
 778                $fn =~ s#^/+##;
 779                my ($tmpname, $size) = $cvs->file($fn,$rev);
 780                if($size == -1) {
 781                        push(@old,$fn);
 782                        print "Drop $fn\n" if $opt_v;
 783                } else {
 784                        print "".($init ? "New" : "Update")." $fn: $size bytes\n" if $opt_v;
 785                        open my $F, '-|', "git-hash-object -w $tmpname"
 786                                or die "Cannot create object: $!\n";
 787                        my $sha = <$F>;
 788                        chomp $sha;
 789                        close $F;
 790                        my $mode = pmode($cvs->{'mode'});
 791                        push(@new,[$mode, $sha, $fn]); # may be resurrected!
 792                }
 793                unlink($tmpname);
 794        } elsif($state == 9 and /^\s+(.+?):\d+(?:\.\d+)+->(\d+(?:\.\d+)+)\(DEAD\)\s*$/) {
 795                my $fn = $1;
 796                $fn =~ s#^/+##;
 797                push(@old,$fn);
 798                print "Delete $fn\n" if $opt_v;
 799        } elsif($state == 9 and /^\s*$/) {
 800                $state = 10;
 801        } elsif(($state == 9 or $state == 10) and /^-+$/) {
 802                &$commit();
 803                $state = 1;
 804        } elsif($state == 11 and /^-+$/) {
 805                $state = 1;
 806        } elsif(/^-+$/) { # end of unknown-line processing
 807                $state = 1;
 808        } elsif($state != 11) { # ignore stuff when skipping
 809                print "* UNKNOWN LINE * $_\n";
 810        }
 811}
 812&$commit() if $branch and $state != 11;
 813
 814unlink($git_index);
 815
 816if (defined $orig_git_index) {
 817        $ENV{GIT_INDEX_FILE} = $orig_git_index;
 818} else {
 819        delete $ENV{GIT_INDEX_FILE};
 820}
 821
 822# Now switch back to the branch we were in before all of this happened
 823if($orig_branch) {
 824        print "DONE\n" if $opt_v;
 825        system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 826                if $forward_master;
 827        unless ($opt_i) {
 828                system('git-read-tree', '-m', '-u', 'CVS2GIT_HEAD', 'HEAD');
 829                die "read-tree failed: $?\n" if $?;
 830        }
 831} else {
 832        $orig_branch = "master";
 833        print "DONE; creating $orig_branch branch\n" if $opt_v;
 834        system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 835                unless -f "$git_dir/refs/heads/master";
 836        system('git-update-ref', 'HEAD', "$orig_branch");
 837        unless ($opt_i) {
 838                system('git checkout');
 839                die "checkout failed: $?\n" if $?;
 840        }
 841}
 842unlink("$git_dir/CVS2GIT_HEAD");