Andrew's git / gitweb.git / git-cvsimport-script
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git-cvsimport-scripton commit Local cvsimport fixups (f65ae60)
   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::Path qw(mkpath);
  20use File::Basename qw(basename dirname);
  21use Time::Local;
  22use IO::Socket;
  23use IO::Pipe;
  24use POSIX qw(strftime dup2);
  25
  26$SIG{'PIPE'}="IGNORE";
  27$ENV{'TZ'}="UTC";
  28
  29our($opt_h,$opt_o,$opt_v,$opt_d);
  30
  31sub usage() {
  32        print STDERR <<END;
  33Usage: ${\basename $0}     # fetch/update GIT from CVS
  34           [ -o branch-for-HEAD ] [ -h ] [ -v ] [ -d CVSROOT ]
  35       CVS_module [ GIT_repository ]
  36END
  37        exit(1);
  38}
  39
  40getopts("hqvo:d:") or usage();
  41usage if $opt_h;
  42
  43@ARGV == 1 or @ARGV == 2 or usage();
  44
  45my($cvs_tree, $git_tree) = @ARGV;
  46
  47if($opt_d) {
  48        $ENV{"CVSROOT"} = $opt_d;
  49} elsif($ENV{"CVSROOT"}) {
  50        $opt_d = $ENV{"CVSROOT"};
  51} else {
  52        die "CVSROOT needs to be set";
  53}
  54$opt_o ||= "origin";
  55$git_tree ||= ".";
  56
  57select(STDERR); $|=1; select(STDOUT);
  58
  59
  60package CVSconn;
  61# Basic CVS dialog.
  62# We're only interested in connecting and downloading, so ...
  63
  64use POSIX qw(strftime dup2);
  65
  66sub new {
  67        my($what,$repo,$subdir) = @_;
  68        $what=ref($what) if ref($what);
  69
  70        my $self = {};
  71        $self->{'buffer'} = "";
  72        bless($self,$what);
  73
  74        $repo =~ s#/+$##;
  75        $self->{'fullrep'} = $repo;
  76        $self->conn();
  77
  78        $self->{'subdir'} = $subdir;
  79        $self->{'lines'} = undef;
  80
  81        return $self;
  82}
  83
  84sub conn {
  85        my $self = shift;
  86        my $repo = $self->{'fullrep'};
  87        if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
  88                my($user,$pass,$serv,$port) = ($1,$2,$3,$4);
  89                $user="anonymous" unless defined $user;
  90                my $rr2 = "-";
  91                unless($port) {
  92                        $rr2 = ":pserver:$user\@$serv:$repo";
  93                        $port=2401;
  94                }
  95                my $rr = ":pserver:$user\@$serv:$port$repo";
  96
  97                unless($pass) {
  98                        open(H,$ENV{'HOME'}."/.cvspass") and do {
  99                                # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
 100                                while(<H>) {
 101                                        chomp;
 102                                        s/^\/\d+\s+//;
 103                                        my ($w,$p) = split(/\s/,$_,2);
 104                                        if($w eq $rr or $w eq $rr2) {
 105                                                $pass = $p;
 106                                                last;
 107                                        }
 108                                }
 109                        };
 110                }
 111                $pass="A" unless $pass;
 112
 113                my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
 114                die "Socket to $serv: $!\n" unless defined $s;
 115                $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
 116                        or die "Write to $serv: $!\n";
 117                $s->flush();
 118
 119                my $rep = <$s>;
 120
 121                if($rep ne "I LOVE YOU\n") {
 122                        $rep="<unknown>" unless $rep;
 123                        die "AuthReply: $rep\n";
 124                }
 125                $self->{'socketo'} = $s;
 126                $self->{'socketi'} = $s;
 127        } else { # local: Fork off our own cvs server.
 128                my $pr = IO::Pipe->new();
 129                my $pw = IO::Pipe->new();
 130                my $pid = fork();
 131                die "Fork: $!\n" unless defined $pid;
 132                unless($pid) {
 133                        $pr->writer();
 134                        $pw->reader();
 135                        dup2($pw->fileno(),0);
 136                        dup2($pr->fileno(),1);
 137                        $pr->close();
 138                        $pw->close();
 139                        exec("cvs","server");
 140                }
 141                $pw->writer();
 142                $pr->reader();
 143                $self->{'socketo'} = $pw;
 144                $self->{'socketi'} = $pr;
 145        }
 146        $self->{'socketo'}->write("Root $repo\n");
 147
 148        # Trial and error says that this probably is the minimum set
 149        $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E F Checked-in Created Updated Merged Removed\n");
 150
 151        $self->{'socketo'}->write("valid-requests\n");
 152        $self->{'socketo'}->flush();
 153
 154        chomp(my $rep=$self->readline());
 155        if($rep !~ s/^Valid-requests\s*//) {
 156                $rep="<unknown>" unless $rep;
 157                die "Expected Valid-requests from server, but got: $rep\n";
 158        }
 159        chomp(my $res=$self->readline());
 160        die "validReply: $res\n" if $res ne "ok";
 161
 162        $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
 163        $self->{'repo'} = $repo;
 164}
 165
 166sub readline {
 167        my($self) = @_;
 168        return $self->{'socketi'}->getline();
 169}
 170
 171sub _file {
 172        # Request a file with a given revision.
 173        # Trial and error says this is a good way to do it. :-/
 174        my($self,$fn,$rev) = @_;
 175        $self->{'socketo'}->write("Argument -N\n") or return undef;
 176        $self->{'socketo'}->write("Argument -P\n") or return undef;
 177        # $self->{'socketo'}->write("Argument -ko\n") or return undef;
 178        # -ko: Linus' version doesn't use it
 179        $self->{'socketo'}->write("Argument -r\n") or return undef;
 180        $self->{'socketo'}->write("Argument $rev\n") or return undef;
 181        $self->{'socketo'}->write("Argument --\n") or return undef;
 182        $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
 183        $self->{'socketo'}->write("Directory .\n") or return undef;
 184        $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
 185        $self->{'socketo'}->write("Sticky T1.1\n") or return undef;
 186        $self->{'socketo'}->write("co\n") or return undef;
 187        $self->{'socketo'}->flush() or return undef;
 188        $self->{'lines'} = 0;
 189        return 1;
 190}
 191sub _line {
 192        # Read a line from the server.
 193        # ... except that 'line' may be an entire file. ;-)
 194        my($self) = @_;
 195        die "Not in lines" unless defined $self->{'lines'};
 196
 197        my $line;
 198        my $res="";
 199        while(defined($line = $self->readline())) {
 200                # M U gnupg-cvs-rep/AUTHORS
 201                # Updated gnupg-cvs-rep/
 202                # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
 203                # /AUTHORS/1.1///T1.1
 204                # u=rw,g=rw,o=rw
 205                # 0
 206                # ok
 207
 208                if($line =~ s/^(?:Created|Updated) //) {
 209                        $line = $self->readline(); # path
 210                        $line = $self->readline(); # Entries line
 211                        my $mode = $self->readline(); chomp $mode;
 212                        $self->{'mode'} = $mode;
 213                        defined (my $cnt = $self->readline())
 214                                or die "EOF from server after 'Changed'\n";
 215                        chomp $cnt;
 216                        die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
 217                        $line="";
 218                        $res="";
 219                        while($cnt) {
 220                                my $buf;
 221                                my $num = $self->{'socketi'}->read($buf,$cnt);
 222                                die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
 223                                $res .= $buf;
 224                                $cnt -= $num;
 225                        }
 226                } elsif($line =~ s/^ //) {
 227                        $res .= $line;
 228                } elsif($line =~ /^M\b/) {
 229                        # output, do nothing
 230                } elsif($line =~ /^Mbinary\b/) {
 231                        my $cnt;
 232                        die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
 233                        chomp $cnt;
 234                        die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
 235                        $line="";
 236                        while($cnt) {
 237                                my $buf;
 238                                my $num = $self->{'socketi'}->read($buf,$cnt);
 239                                die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0;
 240                                $res .= $buf;
 241                                $cnt -= $num;
 242                        }
 243                } else {
 244                        chomp $line;
 245                        if($line eq "ok") {
 246                                # print STDERR "S: ok (".length($res).")\n";
 247                                return $res;
 248                        } elsif($line =~ s/^E //) {
 249                                # print STDERR "S: $line\n";
 250                        } else {
 251                                die "Unknown: $line\n";
 252                        }
 253                }
 254        }
 255}
 256sub file {
 257        my($self,$fn,$rev) = @_;
 258        my $res;
 259
 260        if ($self->_file($fn,$rev)) {
 261                $res = $self->_line();
 262                return $res if defined $res;
 263        }
 264
 265        # retry
 266        $self->conn();
 267        $self->_file($fn,$rev)
 268                or die "No file command send\n";
 269        $res = $self->_line();
 270        die "No input: $fn $rev\n" unless defined $res;
 271        return $res;
 272}
 273
 274
 275package main;
 276
 277my $cvs = CVSconn->new($opt_d, $cvs_tree);
 278
 279
 280sub pdate($) {
 281        my($d) = @_;
 282        m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?#
 283                or die "Unparseable date: $d\n";
 284        my $y=$1; $y-=1900 if $y>1900;
 285        return timegm($6||0,$5,$4,$3,$2-1,$y);
 286}
 287
 288sub pmode($) {
 289        my($mode) = @_;
 290        my $m = 0;
 291        my $mm = 0;
 292        my $um = 0;
 293        for my $x(split(//,$mode)) {
 294                if($x eq ",") {
 295                        $m |= $mm&$um;
 296                        $mm = 0;
 297                        $um = 0;
 298                } elsif($x eq "u") { $um |= 0700;
 299                } elsif($x eq "g") { $um |= 0070;
 300                } elsif($x eq "o") { $um |= 0007;
 301                } elsif($x eq "r") { $mm |= 0444;
 302                } elsif($x eq "w") { $mm |= 0222;
 303                } elsif($x eq "x") { $mm |= 0111;
 304                } elsif($x eq "=") { # do nothing
 305                } else { die "Unknown mode: $mode\n";
 306                }
 307        }
 308        $m |= $mm&$um;
 309        return $m;
 310}
 311
 312my $tmpcv = "/var/cache/cvs";
 313
 314sub getwd() {
 315        my $pwd = `pwd`;
 316        chomp $pwd;
 317        return $pwd;
 318}
 319
 320-d $git_tree
 321        or mkdir($git_tree,0777)
 322        or die "Could not create $git_tree: $!";
 323chdir($git_tree);
 324
 325my $last_branch = "";
 326my %branch_date;
 327
 328my $git_dir = $ENV{"GIT_DIR"} || ".git";
 329$git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
 330$ENV{"GIT_DIR"} = $git_dir;
 331unless(-d $git_dir) {
 332        system("git-init-db");
 333        die "Cannot init the GIT db at $git_tree: $?\n" if $?;
 334        system("git-read-tree");
 335        die "Cannot init an empty tree: $?\n" if $?;
 336
 337        $last_branch = $opt_o;
 338} else {
 339        $last_branch = basename(readlink("$git_dir/HEAD"));
 340        die "Cannot read the last branch name: $!\n" unless $last_branch;
 341
 342        # Get the last import timestamps
 343        opendir(D,"$git_dir/refs/heads");
 344        while(defined(my $head = readdir(D))) {
 345                next if $head =~ /^\./;
 346                open(F,"$git_dir/refs/heads/$head")
 347                        or die "Bad head branch: $head: $!\n";
 348                chomp(my $ftag = <F>);
 349                close(F);
 350                open(F,"git-cat-file commit $ftag |");
 351                while(<F>) {
 352                        next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/;
 353                        $branch_date{$head} = $1;
 354                        last;
 355                }
 356                close(F);
 357        }
 358        closedir(D);
 359}
 360
 361-d $git_dir
 362        or die "Could not create git subdir ($git_dir).\n";
 363
 364my $pid = open(CVS,"-|");
 365die "Cannot fork: $!\n" unless defined $pid;
 366unless($pid) {
 367        exec("cvsps","-A","--cvs-direct",$cvs_tree);
 368        die "Could not start cvsps: $!\n";
 369}
 370
 371
 372## cvsps output:
 373#---------------------
 374#PatchSet 314
 375#Date: 1999/09/18 13:03:59
 376#Author: wkoch
 377#Branch: STABLE-BRANCH-1-0
 378#Ancestor branch: HEAD
 379#Tag: (none)
 380#Log:
 381#    See ChangeLog: Sat Sep 18 13:03:28 CEST 1999  Werner Koch
 382#Members:
 383#       README:1.57->1.57.2.1
 384#       VERSION:1.96->1.96.2.1
 385#
 386#---------------------
 387
 388my $state = 0;
 389
 390my($patchset,$date,$author,$branch,$ancestor,$tag,$logmsg);
 391my(@old,@new);
 392my $commit = sub {
 393        my $pid;
 394        system("git-update-cache","--force-remove","--",@old) if @old;
 395        die "Cannot remove files: $?\n" if $?;
 396        system("git-update-cache","--add","--",@new) if @new;
 397        die "Cannot add files: $?\n" if $?;
 398
 399        $pid = open(C,"-|");
 400        die "Cannot fork: $!" unless defined $pid;
 401        unless($pid) {
 402                exec("git-write-tree");
 403                die "Cannot exec git-write-tree: $!\n";
 404        }
 405        chomp(my $tree = <C>);
 406        length($tree) == 40
 407                or die "Cannot get tree id ($tree): $!\n";
 408        close(C)
 409                or die "Error running git-write-tree: $?\n";
 410        print "Tree ID $tree\n" if $opt_v;
 411
 412        my $parent = "";
 413        if(open(C,"$git_dir/refs/heads/$last_branch")) {
 414                chomp($parent = <C>);
 415                close(C);
 416                length($parent) == 40
 417                        or die "Cannot get parent id ($parent): $!\n";
 418                print "Parent ID $parent\n" if $opt_v;
 419        }
 420
 421        my $pr = IO::Pipe->new();
 422        my $pw = IO::Pipe->new();
 423        $pid = fork();
 424        die "Fork: $!\n" unless defined $pid;
 425        unless($pid) {
 426                $pr->writer();
 427                $pw->reader();
 428                dup2($pw->fileno(),0);
 429                dup2($pr->fileno(),1);
 430                $pr->close();
 431                $pw->close();
 432
 433                my @par = ();
 434                @par = ("-p",$parent) if $parent;
 435                exec("env",
 436                        "GIT_AUTHOR_NAME=$author",
 437                        "GIT_AUTHOR_EMAIL=$author",
 438                        "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 439                        "GIT_COMMITTER_NAME=$author",
 440                        "GIT_COMMITTER_EMAIL=$author",
 441                        "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
 442                        "git-commit-tree", $tree,@par);
 443                die "Cannot exec git-commit-tree: $!\n";
 444        }
 445        $pw->writer();
 446        $pr->reader();
 447        print $pw $logmsg
 448                or die "Error writing to git-commit-tree: $!\n";
 449        $pw->close();
 450
 451        print "Committed patch $patchset ($branch)\n" if $opt_v;
 452        chomp(my $cid = <$pr>);
 453        length($cid) == 40
 454                or die "Cannot get commit id ($cid): $!\n";
 455        print "Commit ID $cid\n" if $opt_v;
 456        $pr->close();
 457
 458        waitpid($pid,0);
 459        die "Error running git-commit-tree: $?\n" if $?;
 460
 461        open(C,">$git_dir/refs/heads/$branch")
 462                or die "Cannot open branch $branch for update: $!\n";
 463        print C "$cid\n"
 464                or die "Cannot write branch $branch for update: $!\n";
 465        close(C)
 466                or die "Cannot write branch $branch for update: $!\n";
 467
 468        if($tag) {
 469                open(C,">$git_dir/refs/tags/$tag")
 470                        or die "Cannot create tag $tag: $!\n";
 471                print C "$cid\n"
 472                        or die "Cannot write tag $branch: $!\n";
 473                close(C)
 474                        or die "Cannot write tag $branch: $!\n";
 475                print "Created tag '$tag' on '$branch'\n" if $opt_v;
 476        }
 477
 478        @old = ();
 479        @new = ();
 480};
 481
 482while(<CVS>) {
 483        chomp;
 484        if($state == 0 and /^-+$/) {
 485                $state = 1;
 486        } elsif($state == 0) {
 487                $state = 1;
 488                redo;
 489        } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) {
 490                $patchset = 0+$_;
 491                $state=2;
 492        } elsif($state == 2 and s/^Date:\s+//) {
 493                $date = pdate($_);
 494                unless($date) {
 495                        print STDERR "Could not parse date: $_\n";
 496                        $state=0;
 497                        next;
 498                }
 499                $state=3;
 500        } elsif($state == 3 and s/^Author:\s+//) {
 501                s/\s+$//;
 502                $author = $_;
 503                $state = 4;
 504        } elsif($state == 4 and s/^Branch:\s+//) {
 505                s/\s+$//;
 506                $branch = $_;
 507                $state = 5;
 508        } elsif($state == 5 and s/^Ancestor branch:\s+//) {
 509                s/\s+$//;
 510                $ancestor = $_;
 511                $ancestor = $opt_o if $ancestor == "HEAD";
 512                $state = 6;
 513        } elsif($state == 5) {
 514                $ancestor = undef;
 515                $state = 6;
 516                redo;
 517        } elsif($state == 6 and s/^Tag:\s+//) {
 518                s/\s+$//;
 519                if($_ eq "(none)") {
 520                        $tag = undef;
 521                } else {
 522                        $tag = $_;
 523                }
 524                $state = 7;
 525        } elsif($state == 7 and /^Log:/) {
 526                $logmsg = "";
 527                $state = 8;
 528        } elsif($state == 8 and /^Members:/) {
 529                $branch = $opt_o if $branch eq "HEAD";
 530                if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
 531                        # skip
 532                        print "skip patchset $patchset: $date before $branch_date{$branch}\n";
 533                        $state = 11;
 534                        next;
 535                }
 536                if($ancestor) {
 537                        if(-f "$git_dir/refs/heads/$branch") {
 538                                print STDERR "Branch $branch already exists!\n";
 539                                $state=11;
 540                                next;
 541                        }
 542                        unless(open(H,"$git_dir/refs/heads/$ancestor")) {
 543                                print STDERR "Branch $ancestor does not exist!\n";
 544                                $state=11;
 545                                next;
 546                        }
 547                        chomp(my $id = <H>);
 548                        close(H);
 549                        unless(open(H,"> $git_dir/refs/heads/$branch")) {
 550                                print STDERR "Could not create branch $branch: $!\n";
 551                                $state=11;
 552                                next;
 553                        }
 554                        print H "$id\n"
 555                                or die "Could not write branch $branch: $!";
 556                        close(H)
 557                                or die "Could not write branch $branch: $!";
 558                }
 559                if(($ancestor || $branch) ne $last_branch) {
 560                        print "Switching from $last_branch to $branch\n" if $opt_v;
 561                        system("git-read-tree -m -u $last_branch $branch");
 562                        die "read-tree $branch failed at $branch: $?\n" if $?;
 563                }
 564                if($branch ne $last_branch) {
 565                        unlink("$git_dir/HEAD");
 566                        symlink("refs/heads/$branch","$git_dir/HEAD");
 567                        $last_branch = $branch;
 568                }
 569                $state = 9;
 570        } elsif($state == 8) {
 571                $logmsg .= "$_\n";
 572        } elsif($state == 9 and /^\s+(\S+):(INITIAL|\d(?:\.\d+)+)->(\d(?:\.\d+)+)\s*$/) {
 573#       VERSION:1.96->1.96.2.1
 574                my $init = ($2 eq "INITIAL");
 575                my $fn = $1;
 576                my $rev = $3;
 577                $fn =~ s#^/+##;
 578                my $data = $cvs->file($fn,$rev);
 579                print "".($init ? "New" : "Update")." $fn: ".length($data)." bytes.\n";
 580                mkpath(dirname($fn),$opt_v);
 581                open(F,"> ./$fn")
 582                        or die "Cannot create '$fn': $!\n";
 583                print F $data
 584                        or die "Cannot write to '$fn': $!\n";
 585                close(F)
 586                        or die "Cannot write to '$fn': $!\n";
 587                chmod(pmode($cvs->{'mode'}), $fn);
 588                push(@new,$fn); # may be resurrected!
 589        } elsif($state == 9 and /^\s+(\S+):\d(?:\.\d+)+->(\d(?:\.\d+)+)\(DEAD\)\s*$/) {
 590                my $fn = $1;
 591                $fn =~ s#^/+##;
 592                push(@old,$fn);
 593        } elsif($state == 9 and /^\s*$/) {
 594                $state = 10;
 595        } elsif(($state == 9 or $state == 10) and /^-+$/) {
 596                &$commit();
 597                $state = 1;
 598        } elsif($state == 11 and /^-+$/) {
 599                $state = 1;
 600        } elsif(/^-+$/) { # end of unknown-line processing
 601                $state = 1;
 602        } elsif($state != 11) { # ignore stuff when skipping
 603                print "* UNKNOWN LINE * $_\n";
 604        }
 605}
 606&$commit() if $branch and $state != 11;
 607
 608print "DONE\n" if $opt_v;