Andrew's git / gitweb.git / git-cvsimport.perl
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git-cvsimport.perlon commit Use consistent shell prompts and example style. (f2416c2)
   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        $last_branch = basename(readlink("$git_dir/HEAD"));
 441        unless($last_branch) {
 442                warn "Cannot read the last branch name: $! -- assuming 'master'\n";
 443                $last_branch = "master";
 444        }
 445        $orig_branch = $last_branch;
 446        if (-f "$git_dir/CVS2GIT_HEAD") {
 447                die <<EOM;
 448CVS2GIT_HEAD exists.
 449Make sure your working directory corresponds to HEAD and remove CVS2GIT_HEAD.
 450You may need to run
 451
 452    git-read-tree -m -u CVS2GIT_HEAD HEAD
 453EOM
 454        }
 455        system('cp', "$git_dir/HEAD", "$git_dir/CVS2GIT_HEAD");
 456
 457        $forward_master =
 458            $opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
 459            system('cmp', '-s', "$git_dir/refs/heads/master", 
 460                                "$git_dir/refs/heads/$opt_o") == 0;
 461
 462        # populate index
 463        system('git-read-tree', $last_branch);
 464        die "read-tree failed: $?\n" if $?;
 465
 466        # Get the last import timestamps
 467        opendir(D,"$git_dir/refs/heads");
 468        while(defined(my $head = readdir(D))) {
 469                next if $head =~ /^\./;
 470                open(F,"$git_dir/refs/heads/$head")
 471                        or die "Bad head branch: $head: $!\n";
 472                chomp(my $ftag = <F>);
 473                close(F);
 474                open(F,"git-cat-file commit $ftag |");
 475                while(<F>) {
 476                        next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/;
 477                        $branch_date{$head} = $1;
 478                        last;
 479                }
 480                close(F);
 481        }
 482        closedir(D);
 483}
 484
 485-d $git_dir
 486        or die "Could not create git subdir ($git_dir).\n";
 487
 488my $pid = open(CVS,"-|");
 489die "Cannot fork: $!\n" unless defined $pid;
 490unless($pid) {
 491        my @opt;
 492        @opt = split(/,/,$opt_p) if defined $opt_p;
 493        unshift @opt, '-z', $opt_z if defined $opt_z;
 494        unshift @opt, '-q'         unless defined $opt_v;
 495        unless (defined($opt_p) && $opt_p =~ m/--no-cvs-direct/) {
 496                push @opt, '--cvs-direct';
 497        }
 498        if ($opt_P) {
 499            exec("cat", $opt_P);
 500        } else {
 501            exec("cvsps",@opt,"-u","-A",'--root',$opt_d,$cvs_tree);
 502            die "Could not start cvsps: $!\n";
 503        }
 504}
 505
 506
 507## cvsps output:
 508#---------------------
 509#PatchSet 314
 510#Date: 1999/09/18 13:03:59
 511#Author: wkoch
 512#Branch: STABLE-BRANCH-1-0
 513#Ancestor branch: HEAD
 514#Tag: (none)
 515#Log:
 516#    See ChangeLog: Sat Sep 18 13:03:28 CEST 1999  Werner Koch
 517#Members:
 518#       README:1.57->1.57.2.1
 519#       VERSION:1.96->1.96.2.1
 520#
 521#---------------------
 522
 523my $state = 0;
 524
 525my($patchset,$date,$author_name,$author_email,$branch,$ancestor,$tag,$logmsg);
 526my(@old,@new);
 527my $commit = sub {
 528        my $pid;
 529        while(@old) {
 530                my @o2;
 531                if(@old > 55) {
 532                        @o2 = splice(@old,0,50);
 533                } else {
 534                        @o2 = @old;
 535                        @old = ();
 536                }
 537                system("git-update-index","--force-remove","--",@o2);
 538                die "Cannot remove files: $?\n" if $?;
 539        }
 540        while(@new) {
 541                my @n2;
 542                if(@new > 12) {
 543                        @n2 = splice(@new,0,10);
 544                } else {
 545                        @n2 = @new;
 546                        @new = ();
 547                }
 548                system("git-update-index","--add",
 549                        (map { ('--cacheinfo', @$_) } @n2));
 550                die "Cannot add files: $?\n" if $?;
 551        }
 552
 553        $pid = open(C,"-|");
 554        die "Cannot fork: $!" unless defined $pid;
 555        unless($pid) {
 556                exec("git-write-tree");
 557                die "Cannot exec git-write-tree: $!\n";
 558        }
 559        chomp(my $tree = <C>);
 560        length($tree) == 40
 561                or die "Cannot get tree id ($tree): $!\n";
 562        close(C)
 563                or die "Error running git-write-tree: $?\n";
 564        print "Tree ID $tree\n" if $opt_v;
 565
 566        my $parent = "";
 567        if(open(C,"$git_dir/refs/heads/$last_branch")) {
 568                chomp($parent = <C>);
 569                close(C);
 570                length($parent) == 40
 571                        or die "Cannot get parent id ($parent): $!\n";
 572                print "Parent ID $parent\n" if $opt_v;
 573        }
 574
 575        my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 576        my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
 577        $pid = fork();
 578        die "Fork: $!\n" unless defined $pid;
 579        unless($pid) {
 580                $pr->writer();
 581                $pw->reader();
 582                open(OUT,">&STDOUT");
 583                dup2($pw->fileno(),0);
 584                dup2($pr->fileno(),1);
 585                $pr->close();
 586                $pw->close();
 587
 588                my @par = ();
 589                @par = ("-p",$parent) if $parent;
 590
 591                # loose detection of merges
 592                # based on the commit msg
 593                foreach my $rx (@mergerx) {
 594                        if ($logmsg =~ $rx) {
 595                                my $mparent = $1;
 596                                if ($mparent eq 'HEAD') { $mparent = $opt_o };
 597                                if ( -e "$git_dir/refs/heads/$mparent") {
 598                                        $mparent = get_headref($mparent, $git_dir);
 599                                        push @par, '-p', $mparent;
 600                                        print OUT "Merge parent branch: $mparent\n" if $opt_v;
 601                                }
 602                        }
 603                }
 604
 605                exec("env",
 606                        "GIT_AUTHOR_NAME=$author_name",
 607                        "GIT_AUTHOR_EMAIL=$author_email",
 608                        "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 609                        "GIT_COMMITTER_NAME=$author_name",
 610                        "GIT_COMMITTER_EMAIL=$author_email",
 611                        "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 612                        "git-commit-tree", $tree,@par);
 613                die "Cannot exec git-commit-tree: $!\n";
 614        }
 615        $pw->writer();
 616        $pr->reader();
 617
 618        # compatibility with git2cvs
 619        substr($logmsg,32767) = "" if length($logmsg) > 32767;
 620        $logmsg =~ s/[\s\n]+\z//;
 621
 622        print $pw "$logmsg\n"
 623                or die "Error writing to git-commit-tree: $!\n";
 624        $pw->close();
 625
 626        print "Committed patch $patchset ($branch ".strftime("%Y-%m-%d %H:%M:%S",gmtime($date)).")\n" if $opt_v;
 627        chomp(my $cid = <$pr>);
 628        length($cid) == 40
 629                or die "Cannot get commit id ($cid): $!\n";
 630        print "Commit ID $cid\n" if $opt_v;
 631        $pr->close();
 632
 633        waitpid($pid,0);
 634        die "Error running git-commit-tree: $?\n" if $?;
 635
 636        open(C,">$git_dir/refs/heads/$branch")
 637                or die "Cannot open branch $branch for update: $!\n";
 638        print C "$cid\n"
 639                or die "Cannot write branch $branch for update: $!\n";
 640        close(C)
 641                or die "Cannot write branch $branch for update: $!\n";
 642
 643        if($tag) {
 644                my($in, $out) = ('','');
 645                my($xtag) = $tag;
 646                $xtag =~ s/\s+\*\*.*$//; # Remove stuff like ** INVALID ** and ** FUNKY **
 647                $xtag =~ tr/_/\./ if ( $opt_u );
 648                
 649                my $pid = open2($in, $out, 'git-mktag');
 650                print $out "object $cid\n".
 651                    "type commit\n".
 652                    "tag $xtag\n".
 653                    "tagger $author_name <$author_email>\n"
 654                    or die "Cannot create tag object $xtag: $!\n";
 655                close($out)
 656                    or die "Cannot create tag object $xtag: $!\n";
 657
 658                my $tagobj = <$in>;
 659                chomp $tagobj;
 660
 661                if ( !close($in) or waitpid($pid, 0) != $pid or
 662                     $? != 0 or $tagobj !~ /^[0123456789abcdef]{40}$/ ) {
 663                    die "Cannot create tag object $xtag: $!\n";
 664                }
 665                
 666
 667                open(C,">$git_dir/refs/tags/$xtag")
 668                        or die "Cannot create tag $xtag: $!\n";
 669                print C "$tagobj\n"
 670                        or die "Cannot write tag $xtag: $!\n";
 671                close(C)
 672                        or die "Cannot write tag $xtag: $!\n";
 673
 674                print "Created tag '$xtag' on '$branch'\n" if $opt_v;
 675        }
 676};
 677
 678while(<CVS>) {
 679        chomp;
 680        if($state == 0 and /^-+$/) {
 681                $state = 1;
 682        } elsif($state == 0) {
 683                $state = 1;
 684                redo;
 685        } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) {
 686                $patchset = 0+$_;
 687                $state=2;
 688        } elsif($state == 2 and s/^Date:\s+//) {
 689                $date = pdate($_);
 690                unless($date) {
 691                        print STDERR "Could not parse date: $_\n";
 692                        $state=0;
 693                        next;
 694                }
 695                $state=3;
 696        } elsif($state == 3 and s/^Author:\s+//) {
 697                s/\s+$//;
 698                if (/^(.*?)\s+<(.*)>/) {
 699                    ($author_name, $author_email) = ($1, $2);
 700                } else {
 701                    $author_name = $author_email = $_;
 702                }
 703                $state = 4;
 704        } elsif($state == 4 and s/^Branch:\s+//) {
 705                s/\s+$//;
 706                s/[\/]/$opt_s/g;
 707                $branch = $_;
 708                $state = 5;
 709        } elsif($state == 5 and s/^Ancestor branch:\s+//) {
 710                s/\s+$//;
 711                $ancestor = $_;
 712                $ancestor = $opt_o if $ancestor eq "HEAD";
 713                $state = 6;
 714        } elsif($state == 5) {
 715                $ancestor = undef;
 716                $state = 6;
 717                redo;
 718        } elsif($state == 6 and s/^Tag:\s+//) {
 719                s/\s+$//;
 720                if($_ eq "(none)") {
 721                        $tag = undef;
 722                } else {
 723                        $tag = $_;
 724                }
 725                $state = 7;
 726        } elsif($state == 7 and /^Log:/) {
 727                $logmsg = "";
 728                $state = 8;
 729        } elsif($state == 8 and /^Members:/) {
 730                $branch = $opt_o if $branch eq "HEAD";
 731                if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
 732                        # skip
 733                        print "skip patchset $patchset: $date before $branch_date{$branch}\n" if $opt_v;
 734                        $state = 11;
 735                        next;
 736                }
 737                if($ancestor) {
 738                        if(-f "$git_dir/refs/heads/$branch") {
 739                                print STDERR "Branch $branch already exists!\n";
 740                                $state=11;
 741                                next;
 742                        }
 743                        unless(open(H,"$git_dir/refs/heads/$ancestor")) {
 744                                print STDERR "Branch $ancestor does not exist!\n";
 745                                $state=11;
 746                                next;
 747                        }
 748                        chomp(my $id = <H>);
 749                        close(H);
 750                        unless(open(H,"> $git_dir/refs/heads/$branch")) {
 751                                print STDERR "Could not create branch $branch: $!\n";
 752                                $state=11;
 753                                next;
 754                        }
 755                        print H "$id\n"
 756                                or die "Could not write branch $branch: $!";
 757                        close(H)
 758                                or die "Could not write branch $branch: $!";
 759                }
 760                if(($ancestor || $branch) ne $last_branch) {
 761                        print "Switching from $last_branch to $branch\n" if $opt_v;
 762                        system("git-read-tree", $branch);
 763                        die "read-tree failed: $?\n" if $?;
 764                }
 765                $last_branch = $branch if $branch ne $last_branch;
 766                $state = 9;
 767        } elsif($state == 8) {
 768                $logmsg .= "$_\n";
 769        } elsif($state == 9 and /^\s+(.+?):(INITIAL|\d+(?:\.\d+)+)->(\d+(?:\.\d+)+)\s*$/) {
 770#       VERSION:1.96->1.96.2.1
 771                my $init = ($2 eq "INITIAL");
 772                my $fn = $1;
 773                my $rev = $3;
 774                $fn =~ s#^/+##;
 775                my ($tmpname, $size) = $cvs->file($fn,$rev);
 776                if($size == -1) {
 777                        push(@old,$fn);
 778                        print "Drop $fn\n" if $opt_v;
 779                } else {
 780                        print "".($init ? "New" : "Update")." $fn: $size bytes\n" if $opt_v;
 781                        open my $F, '-|', "git-hash-object -w $tmpname"
 782                                or die "Cannot create object: $!\n";
 783                        my $sha = <$F>;
 784                        chomp $sha;
 785                        close $F;
 786                        my $mode = pmode($cvs->{'mode'});
 787                        push(@new,[$mode, $sha, $fn]); # may be resurrected!
 788                }
 789                unlink($tmpname);
 790        } elsif($state == 9 and /^\s+(.+?):\d+(?:\.\d+)+->(\d+(?:\.\d+)+)\(DEAD\)\s*$/) {
 791                my $fn = $1;
 792                $fn =~ s#^/+##;
 793                push(@old,$fn);
 794                print "Delete $fn\n" if $opt_v;
 795        } elsif($state == 9 and /^\s*$/) {
 796                $state = 10;
 797        } elsif(($state == 9 or $state == 10) and /^-+$/) {
 798                &$commit();
 799                $state = 1;
 800        } elsif($state == 11 and /^-+$/) {
 801                $state = 1;
 802        } elsif(/^-+$/) { # end of unknown-line processing
 803                $state = 1;
 804        } elsif($state != 11) { # ignore stuff when skipping
 805                print "* UNKNOWN LINE * $_\n";
 806        }
 807}
 808&$commit() if $branch and $state != 11;
 809
 810unlink($git_index);
 811
 812if (defined $orig_git_index) {
 813        $ENV{GIT_INDEX_FILE} = $orig_git_index;
 814} else {
 815        delete $ENV{GIT_INDEX_FILE};
 816}
 817
 818# Now switch back to the branch we were in before all of this happened
 819if($orig_branch) {
 820        print "DONE\n" if $opt_v;
 821        system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 822                if $forward_master;
 823        unless ($opt_i) {
 824                system('git-read-tree', '-m', '-u', 'CVS2GIT_HEAD', 'HEAD');
 825                die "read-tree failed: $?\n" if $?;
 826        }
 827} else {
 828        $orig_branch = "master";
 829        print "DONE; creating $orig_branch branch\n" if $opt_v;
 830        system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
 831                unless -f "$git_dir/refs/heads/master";
 832        unlink("$git_dir/HEAD");
 833        symlink("refs/heads/$orig_branch","$git_dir/HEAD");
 834        unless ($opt_i) {
 835                system('git checkout');
 836                die "checkout failed: $?\n" if $?;
 837        }
 838}
 839unlink("$git_dir/CVS2GIT_HEAD");