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