git-cvsimport.perl

   1 #!/usr/bin/perl
   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 5.008;
  17 use strict;
  18 use warnings;
  19 use Getopt::Long;
  20 use File::Spec;
  21 use File::Temp qw(tempfile tmpnam);
  22 use File::Path qw(mkpath);
  23 use File::Basename qw(basename dirname);
  24 use Time::Local;
  25 use IO::Socket;
  26 use IO::Pipe;
  27 use POSIX qw(strftime tzset dup2 ENOENT);
  28 use IPC::Open2;
  29 use Git qw(get_tz_offset);
  30
  31 $SIG{'PIPE'}="IGNORE";
  32 set_timezone('UTC');
  33
  34 our ($opt_h,$opt_o,$opt_v,$opt_k,$opt_u,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_P, $opt_s,$opt_m,@opt_M,$opt_A,$opt_S,$opt_L, $opt_a, $opt_r, $opt_R);
  35 my (%conv_author_name, %conv_author_email, %conv_author_tz);
  36
  37 sub usage(;$) {
  38         my $msg = shift;
  39         print(STDERR "Error: $msg\n") if $msg;
  40         print STDERR <<END;
  41 usage: git cvsimport     # fetch/update GIT from CVS
  42        [-o branch-for-HEAD] [-h] [-v] [-d CVSROOT] [-A author-conv-file]
  43        [-p opts-for-cvsps] [-P file] [-C GIT_repository] [-z fuzz] [-i] [-k]
  44        [-u] [-s subst] [-a] [-m] [-M regex] [-S regex] [-L commitlimit]
  45        [-r remote] [-R] [CVS_module]
  46 END
  47         exit(1);
  48 }
  49
  50 sub read_author_info($) {
  51         my ($file) = @_;
  52         my $user;
  53         open my $f, '<', "$file" or die("Failed to open $file: $!\n");
  54
  55         while (<$f>) {
  56                 # Expected format is this:
  57                 #   exon=Andreas Ericsson <ae@op5.se>
  58                 if (m/^(\S+?)\s*=\s*(.+?)\s*<(.+)>\s*$/) {
  59                         $user = $1;
  60                         $conv_author_name{$user} = $2;
  61                         $conv_author_email{$user} = $3;
  62                 }
  63                 # or with an optional timezone:
  64                 #   spawn=Simon Pawn <spawn@frog-pond.org> America/Chicago
  65                 elsif (m/^(\S+?)\s*=\s*(.+?)\s*<(.+)>\s*(\S+?)\s*$/) {
  66                         $user = $1;
  67                         $conv_author_name{$user} = $2;
  68                         $conv_author_email{$user} = $3;
  69                         $conv_author_tz{$user} = $4;
  70                 }
  71                 # However, we also read from CVSROOT/users format
  72                 # to ease migration.
  73                 elsif (/^(\w+):(['"]?)(.+?)\2\s*$/) {
  74                         my $mapped;
  75                         ($user, $mapped) = ($1, $3);
  76                         if ($mapped =~ /^\s*(.*?)\s*<(.*)>\s*$/) {
  77                                 $conv_author_name{$user} = $1;
  78                                 $conv_author_email{$user} = $2;
  79                         }
  80                         elsif ($mapped =~ /^<?(.*)>?$/) {
  81                                 $conv_author_name{$user} = $user;
  82                                 $conv_author_email{$user} = $1;
  83                         }
  84                 }
  85                 # NEEDSWORK: Maybe warn on unrecognized lines?
  86         }
  87         close ($f);
  88 }
  89
  90 sub write_author_info($) {
  91         my ($file) = @_;
  92         open my $f, '>', $file or
  93           die("Failed to open $file for writing: $!");
  94
  95         foreach (keys %conv_author_name) {
  96                 print $f "$_=$conv_author_name{$_} <$conv_author_email{$_}>";
  97                 print $f " $conv_author_tz{$_}" if ($conv_author_tz{$_});
  98                 print $f "\n";
  99         }
 100         close ($f);
 101 }
 102
 103 # Versions of perl before 5.10.0 may not automatically check $TZ each
 104 # time localtime is run (most platforms will do so only the first time).
 105 # We can work around this by using tzset() to update the internal
 106 # variable whenever we change the environment.
 107 sub set_timezone {
 108         $ENV{TZ} = shift;
 109         tzset();
 110 }
 111
 112 # convert getopts specs for use by git config
 113 my %longmap = (
 114         'A:' => 'authors-file',
 115         'M:' => 'merge-regex',
 116         'P:' => undef,
 117         'R' => 'track-revisions',
 118         'S:' => 'ignore-paths',
 119 );
 120
 121 sub read_repo_config {
 122         # Split the string between characters, unless there is a ':'
 123         # So "abc:de" becomes ["a", "b", "c:", "d", "e"]
 124         my @opts = split(/ *(?!:)/, shift);
 125         foreach my $o (@opts) {
 126                 my $key = $o;
 127                 $key =~ s/://g;
 128                 my $arg = 'git config';
 129                 $arg .= ' --bool' if ($o !~ /:$/);
 130                 my $ckey = $key;
 131
 132                 if (exists $longmap{$o}) {
 133                         # An uppercase option like -R cannot be
 134                         # expressed in the configuration, as the
 135                         # variable names are downcased.
 136                         $ckey = $longmap{$o};
 137                         next if (! defined $ckey);
 138                         $ckey =~ s/-//g;
 139                 }
 140                 chomp(my $tmp = `$arg --get cvsimport.$ckey`);
 141                 if ($tmp && !($arg =~ /--bool/ && $tmp eq 'false')) {
 142                         no strict 'refs';
 143                         my $opt_name = "opt_" . $key;
 144                         if (!$$opt_name) {
 145                                 $$opt_name = $tmp;
 146                         }
 147                 }
 148         }
 149 }
 150
 151 my $opts = "haivmkuo:d:p:r:C:z:s:M:P:A:S:L:R";
 152 read_repo_config($opts);
 153 Getopt::Long::Configure( 'no_ignore_case', 'bundling' );
 154
 155 # turn the Getopt::Std specification in a Getopt::Long one,
 156 # with support for multiple -M options
 157 GetOptions( map { s/:/=s/; /M/ ? "$_\@" : $_ } split( /(?!:)/, $opts ) )
 158     or usage();
 159 usage if $opt_h;
 160
 161 if (@ARGV == 0) {
 162                 chomp(my $module = `git config --get cvsimport.module`);
 163                 push(@ARGV, $module) if $? == 0;
 164 }
 165 @ARGV <= 1 or usage("You can't specify more than one CVS module");
 166
 167 if ($opt_d) {
 168         $ENV{"CVSROOT"} = $opt_d;
 169 } elsif (-f 'CVS/Root') {
 170         open my $f, '<', 'CVS/Root' or die 'Failed to open CVS/Root';
 171         $opt_d = <$f>;
 172         chomp $opt_d;
 173         close $f;
 174         $ENV{"CVSROOT"} = $opt_d;
 175 } elsif ($ENV{"CVSROOT"}) {
 176         $opt_d = $ENV{"CVSROOT"};
 177 } else {
 178         usage("CVSROOT needs to be set");
 179 }
 180 $opt_s ||= "-";
 181 $opt_a ||= 0;
 182
 183 my $git_tree = $opt_C;
 184 $git_tree ||= ".";
 185
 186 my $remote;
 187 if (defined $opt_r) {
 188         $remote = 'refs/remotes/' . $opt_r;
 189         $opt_o ||= "master";
 190 } else {
 191         $opt_o ||= "origin";
 192         $remote = 'refs/heads';
 193 }
 194
 195 my $cvs_tree;
 196 if ($#ARGV == 0) {
 197         $cvs_tree = $ARGV[0];
 198 } elsif (-f 'CVS/Repository') {
 199         open my $f, '<', 'CVS/Repository' or
 200             die 'Failed to open CVS/Repository';
 201         $cvs_tree = <$f>;
 202         chomp $cvs_tree;
 203         close $f;
 204 } else {
 205         usage("CVS module has to be specified");
 206 }
 207
 208 our @mergerx = ();
 209 if ($opt_m) {
 210         @mergerx = ( qr/\b(?:from|of|merge|merging|merged) ([-\w]+)/i );
 211 }
 212 if (@opt_M) {
 213         push (@mergerx, map { qr/$_/ } @opt_M);
 214 }
 215
 216 # Remember UTC of our starting time
 217 # we'll want to avoid importing commits
 218 # that are too recent
 219 our $starttime = time();
 220
 221 select(STDERR); $|=1; select(STDOUT);
 222
 223
 224 package CVSconn;
 225 # Basic CVS dialog.
 226 # We're only interested in connecting and downloading, so ...
 227
 228 use File::Spec;
 229 use File::Temp qw(tempfile);
 230 use POSIX qw(strftime dup2);
 231
 232 sub new {
 233         my ($what,$repo,$subdir) = @_;
 234         $what=ref($what) if ref($what);
 235
 236         my $self = {};
 237         $self->{'buffer'} = "";
 238         bless($self,$what);
 239
 240         $repo =~ s#/+$##;
 241         $self->{'fullrep'} = $repo;
 242         $self->conn();
 243
 244         $self->{'subdir'} = $subdir;
 245         $self->{'lines'} = undef;
 246
 247         return $self;
 248 }
 249
 250 sub find_password_entry {
 251         my ($cvspass, @cvsroot) = @_;
 252         my ($file, $delim) = @$cvspass;
 253         my $pass;
 254         local ($_);
 255
 256         if (open(my $fh, $file)) {
 257                 # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
 258                 CVSPASSFILE:
 259                 while (<$fh>) {
 260                         chomp;
 261                         s/^\/\d+\s+//;
 262                         my ($w, $p) = split($delim,$_,2);
 263                         for my $cvsroot (@cvsroot) {
 264                                 if ($w eq $cvsroot) {
 265                                         $pass = $p;
 266                                         last CVSPASSFILE;
 267                                 }
 268                         }
 269                 }
 270                 close($fh);
 271         }
 272         return $pass;
 273 }
 274
 275 sub conn {
 276         my $self = shift;
 277         my $repo = $self->{'fullrep'};
 278         if ($repo =~ s/^:pserver(?:([^:]*)):(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
 279                 my ($param,$user,$pass,$serv,$port) = ($1,$2,$3,$4,$5);
 280
 281                 my ($proxyhost,$proxyport);
 282                 if ($param && ($param =~ m/proxy=([^;]+)/)) {
 283                         $proxyhost = $1;
 284                         # Default proxyport, if not specified, is 8080.
 285                         $proxyport = 8080;
 286                         if ($ENV{"CVS_PROXY_PORT"}) {
 287                                 $proxyport = $ENV{"CVS_PROXY_PORT"};
 288                         }
 289                         if ($param =~ m/proxyport=([^;]+)/) {
 290                                 $proxyport = $1;
 291                         }
 292                 }
 293                 $repo ||= '/';
 294
 295                 # if username is not explicit in CVSROOT, then use current user, as cvs would
 296                 $user=(getlogin() || $ENV{'LOGNAME'} || $ENV{'USER'} || "anonymous") unless $user;
 297                 my $rr2 = "-";
 298                 unless ($port) {
 299                         $rr2 = ":pserver:$user\@$serv:$repo";
 300                         $port=2401;
 301                 }
 302                 my $rr = ":pserver:$user\@$serv:$port$repo";
 303
 304                 if ($pass) {
 305                         $pass = $self->_scramble($pass);
 306                 } else {
 307                         my @cvspass = ([$ENV{'HOME'}."/.cvspass", qr/\s/],
 308                                        [$ENV{'HOME'}."/.cvs/cvspass", qr/=/]);
 309                         my @loc = ();
 310                         foreach my $cvspass (@cvspass) {
 311                                 my $p = find_password_entry($cvspass, $rr, $rr2);
 312                                 if ($p) {
 313                                         push @loc, $cvspass->[0];
 314                                         $pass = $p;
 315                                 }
 316                         }
 317
 318                         if (1 < @loc) {
 319                                 die("Multiple cvs password files have ".
 320                                     "entries for CVSROOT $opt_d: @loc");
 321                         } elsif (!$pass) {
 322                                 $pass = "A";
 323                         }
 324                 }
 325
 326                 my ($s, $rep);
 327                 if ($proxyhost) {
 328
 329                         # Use a HTTP Proxy. Only works for HTTP proxies that
 330                         # don't require user authentication
 331                         #
 332                         # See: http://www.ietf.org/rfc/rfc2817.txt
 333
 334                         $s = IO::Socket::INET->new(PeerHost => $proxyhost, PeerPort => $proxyport);
 335                         die "Socket to $proxyhost: $!\n" unless defined $s;
 336                         $s->write("CONNECT $serv:$port HTTP/1.1\r\nHost: $serv:$port\r\n\r\n")
 337                                 or die "Write to $proxyhost: $!\n";
 338                         $s->flush();
 339
 340                         $rep = <$s>;
 341
 342                         # The answer should look like 'HTTP/1.x 2yy ....'
 343                         if (!($rep =~ m#^HTTP/1\.. 2[0-9][0-9]#)) {
 344                                 die "Proxy connect: $rep\n";
 345                         }
 346                         # Skip up to the empty line of the proxy server output
 347                         # including the response headers.
 348                         while ($rep = <$s>) {
 349                                 last if (!defined $rep ||
 350                                          $rep eq "\n" ||
 351                                          $rep eq "\r\n");
 352                         }
 353                 } else {
 354                         $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
 355                         die "Socket to $serv: $!\n" unless defined $s;
 356                 }
 357
 358                 $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
 359                         or die "Write to $serv: $!\n";
 360                 $s->flush();
 361
 362                 $rep = <$s>;
 363
 364                 if ($rep ne "I LOVE YOU\n") {
 365                         $rep="<unknown>" unless $rep;
 366                         die "AuthReply: $rep\n";
 367                 }
 368                 $self->{'socketo'} = $s;
 369                 $self->{'socketi'} = $s;
 370         } else { # local or ext: Fork off our own cvs server.
 371                 my $pr = IO::Pipe->new();
 372                 my $pw = IO::Pipe->new();
 373                 my $pid = fork();
 374                 die "Fork: $!\n" unless defined $pid;
 375                 my $cvs = 'cvs';
 376                 $cvs = $ENV{CVS_SERVER} if exists $ENV{CVS_SERVER};
 377                 my $rsh = 'rsh';
 378                 $rsh = $ENV{CVS_RSH} if exists $ENV{CVS_RSH};
 379
 380                 my @cvs = ($cvs, 'server');
 381                 my ($local, $user, $host);
 382                 $local = $repo =~ s/:local://;
 383                 if (!$local) {
 384                     $repo =~ s/:ext://;
 385                     $local = !($repo =~ s/^(?:([^\@:]+)\@)?([^:]+)://);
 386                     ($user, $host) = ($1, $2);
 387                 }
 388                 if (!$local) {
 389                     if ($user) {
 390                         unshift @cvs, $rsh, '-l', $user, $host;
 391                     } else {
 392                         unshift @cvs, $rsh, $host;
 393                     }
 394                 }
 395
 396                 unless ($pid) {
 397                         $pr->writer();
 398                         $pw->reader();
 399                         dup2($pw->fileno(),0);
 400                         dup2($pr->fileno(),1);
 401                         $pr->close();
 402                         $pw->close();
 403                         exec(@cvs);
 404                 }
 405                 $pw->writer();
 406                 $pr->reader();
 407                 $self->{'socketo'} = $pw;
 408                 $self->{'socketi'} = $pr;
 409         }
 410         $self->{'socketo'}->write("Root $repo\n");
 411
 412         # Trial and error says that this probably is the minimum set
 413         $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E Checked-in Created Updated Merged Removed\n");
 414
 415         $self->{'socketo'}->write("valid-requests\n");
 416         $self->{'socketo'}->flush();
 417
 418         my $rep=$self->readline();
 419         die "Failed to read from server" unless defined $rep;
 420         chomp($rep);
 421         if ($rep !~ s/^Valid-requests\s*//) {
 422                 $rep="<unknown>" unless $rep;
 423                 die "Expected Valid-requests from server, but got: $rep\n";
 424         }
 425         chomp(my $res=$self->readline());
 426         die "validReply: $res\n" if $res ne "ok";
 427
 428         $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
 429         $self->{'repo'} = $repo;
 430 }
 431
 432 sub readline {
 433         my ($self) = @_;
 434         return $self->{'socketi'}->getline();
 435 }
 436
 437 sub _file {
 438         # Request a file with a given revision.
 439         # Trial and error says this is a good way to do it. :-/
 440         my ($self,$fn,$rev) = @_;
 441         $self->{'socketo'}->write("Argument -N\n") or return undef;
 442         $self->{'socketo'}->write("Argument -P\n") or return undef;
 443         # -kk: Linus' version doesn't use it - defaults to off
 444         if ($opt_k) {
 445             $self->{'socketo'}->write("Argument -kk\n") or return undef;
 446         }
 447         $self->{'socketo'}->write("Argument -r\n") or return undef;
 448         $self->{'socketo'}->write("Argument $rev\n") or return undef;
 449         $self->{'socketo'}->write("Argument --\n") or return undef;
 450         $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
 451         $self->{'socketo'}->write("Directory .\n") or return undef;
 452         $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
 453         # $self->{'socketo'}->write("Sticky T1.0\n") or return undef;
 454         $self->{'socketo'}->write("co\n") or return undef;
 455         $self->{'socketo'}->flush() or return undef;
 456         $self->{'lines'} = 0;
 457         return 1;
 458 }
 459 sub _line {
 460         # Read a line from the server.
 461         # ... except that 'line' may be an entire file. ;-)
 462         my ($self, $fh) = @_;
 463         die "Not in lines" unless defined $self->{'lines'};
 464
 465         my $line;
 466         my $res=0;
 467         while (defined($line = $self->readline())) {
 468                 # M U gnupg-cvs-rep/AUTHORS
 469                 # Updated gnupg-cvs-rep/
 470                 # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
 471                 # /AUTHORS/1.1///T1.1
 472                 # u=rw,g=rw,o=rw
 473                 # 0
 474                 # ok
 475
 476                 if ($line =~ s/^(?:Created|Updated) //) {
 477                         $line = $self->readline(); # path
 478                         $line = $self->readline(); # Entries line
 479                         my $mode = $self->readline(); chomp $mode;
 480                         $self->{'mode'} = $mode;
 481                         defined (my $cnt = $self->readline())
 482                                 or die "EOF from server after 'Changed'\n";
 483                         chomp $cnt;
 484                         die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
 485                         $line="";
 486                         $res = $self->_fetchfile($fh, $cnt);
 487                 } elsif ($line =~ s/^ //) {
 488                         print $fh $line;
 489                         $res += length($line);
 490                 } elsif ($line =~ /^M\b/) {
 491                         # output, do nothing
 492                 } elsif ($line =~ /^Mbinary\b/) {
 493                         my $cnt;
 494                         die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
 495                         chomp $cnt;
 496                         die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
 497                         $line="";
 498                         $res += $self->_fetchfile($fh, $cnt);
 499                 } else {
 500                         chomp $line;
 501                         if ($line eq "ok") {
 502                                 # print STDERR "S: ok (".length($res).")\n";
 503                                 return $res;
 504                         } elsif ($line =~ s/^E //) {
 505                                 # print STDERR "S: $line\n";
 506                         } elsif ($line =~ /^(Remove-entry|Removed) /i) {
 507                                 $line = $self->readline(); # filename
 508                                 $line = $self->readline(); # OK
 509                                 chomp $line;
 510                                 die "Unknown: $line" if $line ne "ok";
 511                                 return -1;
 512                         } else {
 513                                 die "Unknown: $line\n";
 514                         }
 515                 }
 516         }
 517         return undef;
 518 }
 519 sub file {
 520         my ($self,$fn,$rev) = @_;
 521         my $res;
 522
 523         my ($fh, $name) = tempfile('gitcvs.XXXXXX',
 524                     DIR => File::Spec->tmpdir(), UNLINK => 1);
 525
 526         $self->_file($fn,$rev) and $res = $self->_line($fh);
 527
 528         if (!defined $res) {
 529             print STDERR "Server has gone away while fetching $fn $rev, retrying...\n";
 530             truncate $fh, 0;
 531             $self->conn();
 532             $self->_file($fn,$rev) or die "No file command send";
 533             $res = $self->_line($fh);
 534             die "Retry failed" unless defined $res;
 535         }
 536         close ($fh);
 537
 538         return ($name, $res);
 539 }
 540 sub _fetchfile {
 541         my ($self, $fh, $cnt) = @_;
 542         my $res = 0;
 543         my $bufsize = 1024 * 1024;
 544         while ($cnt) {
 545             if ($bufsize > $cnt) {
 546                 $bufsize = $cnt;
 547             }
 548             my $buf;
 549             my $num = $self->{'socketi'}->read($buf,$bufsize);
 550             die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
 551             print $fh $buf;
 552             $res += $num;
 553             $cnt -= $num;
 554         }
 555         return $res;
 556 }
 557
 558 sub _scramble {
 559         my ($self, $pass) = @_;
 560         my $scrambled = "A";
 561
 562         return $scrambled unless $pass;
 563
 564         my $pass_len = length($pass);
 565         my @pass_arr = split("", $pass);
 566         my $i;
 567
 568         # from cvs/src/scramble.c
 569         my @shifts = (
 570                   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 571                  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
 572                 114,120, 53, 79, 96,109, 72,108, 70, 64, 76, 67,116, 74, 68, 87,
 573                 111, 52, 75,119, 49, 34, 82, 81, 95, 65,112, 86,118,110,122,105,
 574                  41, 57, 83, 43, 46,102, 40, 89, 38,103, 45, 50, 42,123, 91, 35,
 575                 125, 55, 54, 66,124,126, 59, 47, 92, 71,115, 78, 88,107,106, 56,
 576                  36,121,117,104,101,100, 69, 73, 99, 63, 94, 93, 39, 37, 61, 48,
 577                  58,113, 32, 90, 44, 98, 60, 51, 33, 97, 62, 77, 84, 80, 85,223,
 578                 225,216,187,166,229,189,222,188,141,249,148,200,184,136,248,190,
 579                 199,170,181,204,138,232,218,183,255,234,220,247,213,203,226,193,
 580                 174,172,228,252,217,201,131,230,197,211,145,238,161,179,160,212,
 581                 207,221,254,173,202,146,224,151,140,196,205,130,135,133,143,246,
 582                 192,159,244,239,185,168,215,144,139,165,180,157,147,186,214,176,
 583                 227,231,219,169,175,156,206,198,129,164,150,210,154,177,134,127,
 584                 182,128,158,208,162,132,167,209,149,241,153,251,237,236,171,195,
 585                 243,233,253,240,194,250,191,155,142,137,245,235,163,242,178,152
 586         );
 587
 588         for ($i = 0; $i < $pass_len; $i++) {
 589                 $scrambled .= pack("C", $shifts[ord($pass_arr[$i])]);
 590         }
 591
 592         return $scrambled;
 593 }
 594
 595 package main;
 596
 597 my $cvs = CVSconn->new($opt_d, $cvs_tree);
 598
 599
 600 sub pdate($) {
 601         my ($d) = @_;
 602         m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?#
 603                 or die "Unparseable date: $d\n";
 604         my $y=$1; $y-=1900 if $y>1900;
 605         return timegm($6||0,$5,$4,$3,$2-1,$y);
 606 }
 607
 608 sub pmode($) {
 609         my ($mode) = @_;
 610         my $m = 0;
 611         my $mm = 0;
 612         my $um = 0;
 613         for my $x(split(//,$mode)) {
 614                 if ($x eq ",") {
 615                         $m |= $mm&$um;
 616                         $mm = 0;
 617                         $um = 0;
 618                 } elsif ($x eq "u") { $um |= 0700;
 619                 } elsif ($x eq "g") { $um |= 0070;
 620                 } elsif ($x eq "o") { $um |= 0007;
 621                 } elsif ($x eq "r") { $mm |= 0444;
 622                 } elsif ($x eq "w") { $mm |= 0222;
 623                 } elsif ($x eq "x") { $mm |= 0111;
 624                 } elsif ($x eq "=") { # do nothing
 625                 } else { die "Unknown mode: $mode\n";
 626                 }
 627         }
 628         $m |= $mm&$um;
 629         return $m;
 630 }
 631
 632 sub getwd() {
 633         my $pwd = `pwd`;
 634         chomp $pwd;
 635         return $pwd;
 636 }
 637
 638 sub is_sha1 {
 639         my $s = shift;
 640         return $s =~ /^[a-f0-9]{40}$/;
 641 }
 642
 643 sub get_headref ($) {
 644         my $name = shift;
 645         my $r = `git rev-parse --verify '$name' 2>/dev/null`;
 646         return undef unless $? == 0;
 647         chomp $r;
 648         return $r;
 649 }
 650
 651 my $user_filename_prepend = '';
 652 sub munge_user_filename {
 653         my $name = shift;
 654         return File::Spec->file_name_is_absolute($name) ?
 655                 $name :
 656                 $user_filename_prepend . $name;
 657 }
 658
 659 -d $git_tree
 660         or mkdir($git_tree,0777)
 661         or die "Could not create $git_tree: $!";
 662 if ($git_tree ne '.') {
 663         $user_filename_prepend = getwd() . '/';
 664         chdir($git_tree);
 665 }
 666
 667 my $last_branch = "";
 668 my $orig_branch = "";
 669 my %branch_date;
 670 my $tip_at_start = undef;
 671
 672 my $git_dir = $ENV{"GIT_DIR"} || ".git";
 673 $git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
 674 $ENV{"GIT_DIR"} = $git_dir;
 675 my $orig_git_index;
 676 $orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
 677
 678 my %index; # holds filenames of one index per branch
 679
 680 unless (-d $git_dir) {
 681         system(qw(git init));
 682         die "Cannot init the GIT db at $git_tree: $?\n" if $?;
 683         system(qw(git read-tree --empty));
 684         die "Cannot init an empty tree: $?\n" if $?;
 685
 686         $last_branch = $opt_o;
 687         $orig_branch = "";
 688 } else {
 689         open(F, "-|", qw(git symbolic-ref HEAD)) or
 690                 die "Cannot run git symbolic-ref: $!\n";
 691         chomp ($last_branch = <F>);
 692         $last_branch = basename($last_branch);
 693         close(F);
 694         unless ($last_branch) {
 695                 warn "Cannot read the last branch name: $! -- assuming 'master'\n";
 696                 $last_branch = "master";
 697         }
 698         $orig_branch = $last_branch;
 699         $tip_at_start = `git rev-parse --verify HEAD`;
 700
 701         # Get the last import timestamps
 702         my $fmt = '($ref, $author) = (%(refname), %(author));';
 703         my @cmd = ('git', 'for-each-ref', '--perl', "--format=$fmt", $remote);
 704         open(H, "-|", @cmd) or die "Cannot run git for-each-ref: $!\n";
 705         while (defined(my $entry = <H>)) {
 706                 my ($ref, $author);
 707                 eval($entry) || die "cannot eval refs list: $@";
 708                 my ($head) = ($ref =~ m|^$remote/(.*)|);
 709                 $author =~ /^.*\s(\d+)\s[-+]\d{4}$/;
 710                 $branch_date{$head} = $1;
 711         }
 712         close(H);
 713         if (!exists $branch_date{$opt_o}) {
 714                 die "Branch '$opt_o' does not exist.\n".
 715                        "Either use the correct '-o branch' option,\n".
 716                        "or import to a new repository.\n";
 717         }
 718 }
 719
 720 -d $git_dir
 721         or die "Could not create git subdir ($git_dir).\n";
 722
 723 # now we read (and possibly save) author-info as well
 724 -f "$git_dir/cvs-authors" and
 725   read_author_info("$git_dir/cvs-authors");
 726 if ($opt_A) {
 727         read_author_info(munge_user_filename($opt_A));
 728         write_author_info("$git_dir/cvs-authors");
 729 }
 730
 731 # open .git/cvs-revisions, if requested
 732 open my $revision_map, '>>', "$git_dir/cvs-revisions"
 733     or die "Can't open $git_dir/cvs-revisions for appending: $!\n"
 734         if defined $opt_R;
 735
 736
 737 #
 738 # run cvsps into a file unless we are getting
 739 # it passed as a file via $opt_P
 740 #
 741 my $cvspsfile;
 742 unless ($opt_P) {
 743         print "Running cvsps...\n" if $opt_v;
 744         my $pid = open(CVSPS,"-|");
 745         my $cvspsfh;
 746         die "Cannot fork: $!\n" unless defined $pid;
 747         unless ($pid) {
 748                 my @opt;
 749                 @opt = split(/,/,$opt_p) if defined $opt_p;
 750                 unshift @opt, '-z', $opt_z if defined $opt_z;
 751                 unshift @opt, '-q'         unless defined $opt_v;
 752                 unless (defined($opt_p) && $opt_p =~ m/--no-cvs-direct/) {
 753                         push @opt, '--cvs-direct';
 754                 }
 755                 exec("cvsps","--norc",@opt,"-u","-A",'--root',$opt_d,$cvs_tree);
 756                 die "Could not start cvsps: $!\n";
 757         }
 758         ($cvspsfh, $cvspsfile) = tempfile('gitXXXXXX', SUFFIX => '.cvsps',
 759                                           DIR => File::Spec->tmpdir());
 760         while (<CVSPS>) {
 761             print $cvspsfh $_;
 762         }
 763         close CVSPS;
 764         $? == 0 or die "git cvsimport: fatal: cvsps reported error\n";
 765         close $cvspsfh;
 766 } else {
 767         $cvspsfile = munge_user_filename($opt_P);
 768 }
 769
 770 open(CVS, "<$cvspsfile") or die $!;
 771
 772 ## cvsps output:
 773 #---------------------
 774 #PatchSet 314
 775 #Date: 1999/09/18 13:03:59
 776 #Author: wkoch
 777 #Branch: STABLE-BRANCH-1-0
 778 #Ancestor branch: HEAD
 779 #Tag: (none)
 780 #Log:
 781 #    See ChangeLog: Sat Sep 18 13:03:28 CEST 1999  Werner Koch
 782 #Members:
 783 #       README:1.57->1.57.2.1
 784 #       VERSION:1.96->1.96.2.1
 785 #
 786 #---------------------
 787
 788 my $state = 0;
 789
 790 sub update_index (\@\@) {
 791         my $old = shift;
 792         my $new = shift;
 793         open(my $fh, '|-', qw(git update-index -z --index-info))
 794                 or die "unable to open git update-index: $!";
 795         print $fh
 796                 (map { "0 0000000000000000000000000000000000000000\t$_\0" }
 797                         @$old),
 798                 (map { '100' . sprintf('%o', $_->[0]) . " $_->[1]\t$_->[2]\0" }
 799                         @$new)
 800                 or die "unable to write to git update-index: $!";
 801         close $fh
 802                 or die "unable to write to git update-index: $!";
 803         $? and die "git update-index reported error: $?";
 804 }
 805
 806 sub write_tree () {
 807         open(my $fh, '-|', qw(git write-tree))
 808                 or die "unable to open git write-tree: $!";
 809         chomp(my $tree = <$fh>);
 810         is_sha1($tree)
 811                 or die "Cannot get tree id ($tree): $!";
 812         close($fh)
 813                 or die "Error running git write-tree: $?\n";
 814         print "Tree ID $tree\n" if $opt_v;
 815         return $tree;
 816 }
 817
 818 my ($patchset,$date,$author_name,$author_email,$author_tz,$branch,$ancestor,$tag,$logmsg);
 819 my (@old,@new,@skipped,%ignorebranch,@commit_revisions);
 820
 821 # commits that cvsps cannot place anywhere...
 822 $ignorebranch{'#CVSPS_NO_BRANCH'} = 1;
 823
 824 sub commit {
 825         if ($branch eq $opt_o && !$index{branch} &&
 826                 !get_headref("$remote/$branch")) {
 827             # looks like an initial commit
 828             # use the index primed by git init
 829             $ENV{GIT_INDEX_FILE} = "$git_dir/index";
 830             $index{$branch} = "$git_dir/index";
 831         } else {
 832             # use an index per branch to speed up
 833             # imports of projects with many branches
 834             unless ($index{$branch}) {
 835                 $index{$branch} = tmpnam();
 836                 $ENV{GIT_INDEX_FILE} = $index{$branch};
 837                 if ($ancestor) {
 838                     system("git", "read-tree", "$remote/$ancestor");
 839                 } else {
 840                     system("git", "read-tree", "$remote/$branch");
 841                 }
 842                 die "read-tree failed: $?\n" if $?;
 843             }
 844         }
 845         $ENV{GIT_INDEX_FILE} = $index{$branch};
 846
 847         update_index(@old, @new);
 848         @old = @new = ();
 849         my $tree = write_tree();
 850         my $parent = get_headref("$remote/$last_branch");
 851         print "Parent ID " . ($parent ? $parent : "(empty)") . "\n" if $opt_v;
 852
 853         my @commit_args;
 854         push @commit_args, ("-p", $parent) if $parent;
 855
 856         # loose detection of merges
 857         # based on the commit msg
 858         foreach my $rx (@mergerx) {
 859                 next unless $logmsg =~ $rx && $1;
 860                 my $mparent = $1 eq 'HEAD' ? $opt_o : $1;
 861                 if (my $sha1 = get_headref("$remote/$mparent")) {
 862                         push @commit_args, '-p', "$remote/$mparent";
 863                         print "Merge parent branch: $mparent\n" if $opt_v;
 864                 }
 865         }
 866
 867         set_timezone($author_tz);
 868         # $date is in the seconds since epoch format
 869         my $tz_offset = get_tz_offset($date);
 870         my $commit_date = "$date $tz_offset";
 871         set_timezone('UTC');
 872         $ENV{GIT_AUTHOR_NAME} = $author_name;
 873         $ENV{GIT_AUTHOR_EMAIL} = $author_email;
 874         $ENV{GIT_AUTHOR_DATE} = $commit_date;
 875         $ENV{GIT_COMMITTER_NAME} = $author_name;
 876         $ENV{GIT_COMMITTER_EMAIL} = $author_email;
 877         $ENV{GIT_COMMITTER_DATE} = $commit_date;
 878         my $pid = open2(my $commit_read, my $commit_write,
 879                 'git', 'commit-tree', $tree, @commit_args);
 880
 881         # compatibility with git2cvs
 882         substr($logmsg,32767) = "" if length($logmsg) > 32767;
 883         $logmsg =~ s/[\s\n]+\z//;
 884
 885         if (@skipped) {
 886             $logmsg .= "\n\n\nSKIPPED:\n\t";
 887             $logmsg .= join("\n\t", @skipped) . "\n";
 888             @skipped = ();
 889         }
 890
 891         print($commit_write "$logmsg\n") && close($commit_write)
 892                 or die "Error writing to git commit-tree: $!\n";
 893
 894         print "Committed patch $patchset ($branch $commit_date)\n" if $opt_v;
 895         chomp(my $cid = <$commit_read>);
 896         is_sha1($cid) or die "Cannot get commit id ($cid): $!\n";
 897         print "Commit ID $cid\n" if $opt_v;
 898         close($commit_read);
 899
 900         waitpid($pid,0);
 901         die "Error running git commit-tree: $?\n" if $?;
 902
 903         system('git' , 'update-ref', "$remote/$branch", $cid) == 0
 904                 or die "Cannot write branch $branch for update: $!\n";
 905
 906         if ($revision_map) {
 907                 print $revision_map "@$_ $cid\n" for @commit_revisions;
 908         }
 909         @commit_revisions = ();
 910
 911         if ($tag) {
 912                 my ($xtag) = $tag;
 913                 $xtag =~ s/\s+\*\*.*$//; # Remove stuff like ** INVALID ** and ** FUNKY **
 914                 $xtag =~ tr/_/\./ if ( $opt_u );
 915                 $xtag =~ s/[\/]/$opt_s/g;
 916
 917                 # See refs.c for these rules.
 918                 # Tag cannot contain bad chars. (See bad_ref_char in refs.c.)
 919                 $xtag =~ s/[ ~\^:\\\*\?\[]//g;
 920                 # Other bad strings for tags:
 921                 # (See check_refname_component in refs.c.)
 922                 1 while $xtag =~ s/
 923                         (?: \.\.        # Tag cannot contain '..'.
 924                         |   \@\{        # Tag cannot contain '@{'.
 925                         | ^ -           # Tag cannot begin with '-'.
 926                         |   \.lock $    # Tag cannot end with '.lock'.
 927                         | ^ \.          # Tag cannot begin...
 928                         |   \. $        # ...or end with '.'
 929                         )//xg;
 930                 # Tag cannot be empty.
 931                 if ($xtag eq '') {
 932                         warn("warning: ignoring tag '$tag'",
 933                         " with invalid tagname\n");
 934                         return;
 935                 }
 936
 937                 if (system('git' , 'tag', '-f', $xtag, $cid) != 0) {
 938                         # We did our best to sanitize the tag, but still failed
 939                         # for whatever reason. Bail out, and give the user
 940                         # enough information to understand if/how we should
 941                         # improve the translation in the future.
 942                         if ($tag ne $xtag) {
 943                                 print "Translated '$tag' tag to '$xtag'\n";
 944                         }
 945                         die "Cannot create tag $xtag: $!\n";
 946                 }
 947
 948                 print "Created tag '$xtag' on '$branch'\n" if $opt_v;
 949         }
 950 };
 951
 952 my $commitcount = 1;
 953 while (<CVS>) {
 954         chomp;
 955         if ($state == 0 and /^-+$/) {
 956                 $state = 1;
 957         } elsif ($state == 0) {
 958                 $state = 1;
 959                 redo;
 960         } elsif (($state==0 or $state==1) and s/^PatchSet\s+//) {
 961                 $patchset = 0+$_;
 962                 $state=2;
 963         } elsif ($state == 2 and s/^Date:\s+//) {
 964                 $date = pdate($_);
 965                 unless ($date) {
 966                         print STDERR "Could not parse date: $_\n";
 967                         $state=0;
 968                         next;
 969                 }
 970                 $state=3;
 971         } elsif ($state == 3 and s/^Author:\s+//) {
 972                 $author_tz = "UTC";
 973                 s/\s+$//;
 974                 if (/^(.*?)\s+<(.*)>/) {
 975                     ($author_name, $author_email) = ($1, $2);
 976                 } elsif ($conv_author_name{$_}) {
 977                         $author_name = $conv_author_name{$_};
 978                         $author_email = $conv_author_email{$_};
 979                         $author_tz = $conv_author_tz{$_} if ($conv_author_tz{$_});
 980                 } else {
 981                     $author_name = $author_email = $_;
 982                 }
 983                 $state = 4;
 984         } elsif ($state == 4 and s/^Branch:\s+//) {
 985                 s/\s+$//;
 986                 tr/_/\./ if ( $opt_u );
 987                 s/[\/]/$opt_s/g;
 988                 $branch = $_;
 989                 $state = 5;
 990         } elsif ($state == 5 and s/^Ancestor branch:\s+//) {
 991                 s/\s+$//;
 992                 $ancestor = $_;
 993                 $ancestor = $opt_o if $ancestor eq "HEAD";
 994                 $state = 6;
 995         } elsif ($state == 5) {
 996                 $ancestor = undef;
 997                 $state = 6;
 998                 redo;
 999         } elsif ($state == 6 and s/^Tag:\s+//) {
1000                 s/\s+$//;
1001                 if ($_ eq "(none)") {
1002                         $tag = undef;
1003                 } else {
1004                         $tag = $_;
1005                 }
1006                 $state = 7;
1007         } elsif ($state == 7 and /^Log:/) {
1008                 $logmsg = "";
1009                 $state = 8;
1010         } elsif ($state == 8 and /^Members:/) {
1011                 $branch = $opt_o if $branch eq "HEAD";
1012                 if (defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
1013                         # skip
1014                         print "skip patchset $patchset: $date before $branch_date{$branch}\n" if $opt_v;
1015                         $state = 11;
1016                         next;
1017                 }
1018                 if (!$opt_a && $starttime - 300 - (defined $opt_z ? $opt_z : 300) <= $date) {
1019                         # skip if the commit is too recent
1020                         # given that the cvsps default fuzz is 300s, we give ourselves another
1021                         # 300s just in case -- this also prevents skipping commits
1022                         # due to server clock drift
1023                         print "skip patchset $patchset: $date too recent\n" if $opt_v;
1024                         $state = 11;
1025                         next;
1026                 }
1027                 if (exists $ignorebranch{$branch}) {
1028                         print STDERR "Skipping $branch\n";
1029                         $state = 11;
1030                         next;
1031                 }
1032                 if ($ancestor) {
1033                         if ($ancestor eq $branch) {
1034                                 print STDERR "Branch $branch erroneously stems from itself -- changed ancestor to $opt_o\n";
1035                                 $ancestor = $opt_o;
1036                         }
1037                         if (defined get_headref("$remote/$branch")) {
1038                                 print STDERR "Branch $branch already exists!\n";
1039                                 $state=11;
1040                                 next;
1041                         }
1042                         my $id = get_headref("$remote/$ancestor");
1043                         if (!$id) {
1044                                 print STDERR "Branch $ancestor does not exist!\n";
1045                                 $ignorebranch{$branch} = 1;
1046                                 $state=11;
1047                                 next;
1048                         }
1049
1050                         system(qw(git update-ref -m cvsimport),
1051                                 "$remote/$branch", $id);
1052                         if($? != 0) {
1053                                 print STDERR "Could not create branch $branch\n";
1054                                 $ignorebranch{$branch} = 1;
1055                                 $state=11;
1056                                 next;
1057                         }
1058                 }
1059                 $last_branch = $branch if $branch ne $last_branch;
1060                 $state = 9;
1061         } elsif ($state == 8) {
1062                 $logmsg .= "$_\n";
1063         } elsif ($state == 9 and /^\s+(.+?):(INITIAL|\d+(?:\.\d+)+)->(\d+(?:\.\d+)+)\s*$/) {
1064 #       VERSION:1.96->1.96.2.1
1065                 my $init = ($2 eq "INITIAL");
1066                 my $fn = $1;
1067                 my $rev = $3;
1068                 $fn =~ s#^/+##;
1069                 if ($opt_S && $fn =~ m/$opt_S/) {
1070                     print "SKIPPING $fn v $rev\n";
1071                     push(@skipped, $fn);
1072                     next;
1073                 }
1074                 push @commit_revisions, [$fn, $rev];
1075                 print "Fetching $fn   v $rev\n" if $opt_v;
1076                 my ($tmpname, $size) = $cvs->file($fn,$rev);
1077                 if ($size == -1) {
1078                         push(@old,$fn);
1079                         print "Drop $fn\n" if $opt_v;
1080                 } else {
1081                         print "".($init ? "New" : "Update")." $fn: $size bytes\n" if $opt_v;
1082                         my $pid = open(my $F, '-|');
1083                         die $! unless defined $pid;
1084                         if (!$pid) {
1085                             exec("git", "hash-object", "-w", $tmpname)
1086                                 or die "Cannot create object: $!\n";
1087                         }
1088                         my $sha = <$F>;
1089                         chomp $sha;
1090                         close $F;
1091                         my $mode = pmode($cvs->{'mode'});
1092                         push(@new,[$mode, $sha, $fn]); # may be resurrected!
1093                 }
1094                 unlink($tmpname);
1095         } elsif ($state == 9 and /^\s+(.+?):\d+(?:\.\d+)+->(\d+(?:\.\d+)+)\(DEAD\)\s*$/) {
1096                 my $fn = $1;
1097                 my $rev = $2;
1098                 $fn =~ s#^/+##;
1099                 push @commit_revisions, [$fn, $rev];
1100                 push(@old,$fn);
1101                 print "Delete $fn\n" if $opt_v;
1102         } elsif ($state == 9 and /^\s*$/) {
1103                 $state = 10;
1104         } elsif (($state == 9 or $state == 10) and /^-+$/) {
1105                 $commitcount++;
1106                 if ($opt_L && $commitcount > $opt_L) {
1107                         last;
1108                 }
1109                 commit();
1110                 if (($commitcount & 1023) == 0) {
1111                         system(qw(git repack -a -d));
1112                 }
1113                 $state = 1;
1114         } elsif ($state == 11 and /^-+$/) {
1115                 $state = 1;
1116         } elsif (/^-+$/) { # end of unknown-line processing
1117                 $state = 1;
1118         } elsif ($state != 11) { # ignore stuff when skipping
1119                 print STDERR "* UNKNOWN LINE * $_\n";
1120         }
1121 }
1122 commit() if $branch and $state != 11;
1123
1124 unless ($opt_P) {
1125         unlink($cvspsfile);
1126 }
1127
1128 # The heuristic of repacking every 1024 commits can leave a
1129 # lot of unpacked data.  If there is more than 1MB worth of
1130 # not-packed objects, repack once more.
1131 my $line = `git count-objects`;
1132 if ($line =~ /^(\d+) objects, (\d+) kilobytes$/) {
1133   my ($n_objects, $kb) = ($1, $2);
1134   1024 < $kb
1135     and system(qw(git repack -a -d));
1136 }
1137
1138 foreach my $git_index (values %index) {
1139     if ($git_index ne "$git_dir/index") {
1140         unlink($git_index);
1141     }
1142 }
1143
1144 if (defined $orig_git_index) {
1145         $ENV{GIT_INDEX_FILE} = $orig_git_index;
1146 } else {
1147         delete $ENV{GIT_INDEX_FILE};
1148 }
1149
1150 # Now switch back to the branch we were in before all of this happened
1151 if ($orig_branch) {
1152         print "DONE.\n" if $opt_v;
1153         if ($opt_i) {
1154                 exit 0;
1155         }
1156         my $tip_at_end = `git rev-parse --verify HEAD`;
1157         if ($tip_at_start ne $tip_at_end) {
1158                 for ($tip_at_start, $tip_at_end) { chomp; }
1159                 print "Fetched into the current branch.\n" if $opt_v;
1160                 system(qw(git read-tree -u -m),
1161                        $tip_at_start, $tip_at_end);
1162                 die "Fast-forward update failed: $?\n" if $?;
1163         }
1164         else {
1165                 system(qw(git merge -m cvsimport), "$remote/$opt_o");
1166                 die "Could not merge $opt_o into the current branch.\n" if $?;
1167         }
1168 } else {
1169         $orig_branch = "master";
1170         print "DONE; creating $orig_branch branch\n" if $opt_v;
1171         system("git", "update-ref", "refs/heads/master", "$remote/$opt_o")
1172                 unless defined get_headref('refs/heads/master');
1173         system("git", "symbolic-ref", "$remote/HEAD", "$remote/$opt_o")
1174                 if ($opt_r && $opt_o ne 'HEAD');
1175         system('git', 'update-ref', 'HEAD', "$orig_branch");
1176         unless ($opt_i) {
1177                 system(qw(git checkout -f));
1178                 die "checkout failed: $?\n" if $?;
1179         }
1180 }