Added Perl git-cvsimport-script
authorMatthias Urlichs <smurf@kiste.(none)>
Tue, 28 Jun 2005 14:48:40 +0000 (16:48 +0200)
committerMatthias Urlichs <smurf@kiste.(none)>
Tue, 28 Jun 2005 14:48:40 +0000 (16:48 +0200)
Makefile
cvs2git.c [deleted file]
git-cvsimport-script

index 1736980d09a46e079eec4435d16d5b891865543e..9379e16bb19e6a9f62d5c0af310ae3bb5c951dd1 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -35,7 +35,7 @@ PROG=   git-update-cache git-diff-files git-init-db git-write-tree \
        git-http-pull git-ssh-push git-ssh-pull git-rev-list git-mktag \
        git-diff-helper git-tar-tree git-local-pull git-write-blob \
        git-get-tar-commit-id git-apply git-stripspace \
-       git-cvs2git git-diff-stages git-rev-parse git-patch-id \
+       git-diff-stages git-rev-parse git-patch-id \
        git-pack-objects git-unpack-objects
 
 all: $(PROG)
@@ -118,7 +118,6 @@ git-diff-helper: diff-helper.c
 git-tar-tree: tar-tree.c
 git-write-blob: write-blob.c
 git-stripspace: stripspace.c
-git-cvs2git: cvs2git.c
 git-diff-stages: diff-stages.c
 git-rev-parse: rev-parse.c
 git-patch-id: patch-id.c
diff --git a/cvs2git.c b/cvs2git.c
deleted file mode 100644 (file)
index ab05908..0000000
--- a/cvs2git.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- * cvs2git
- *
- * Copyright (C) Linus Torvalds 2005
- */
-
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-static int verbose = 0;
-
-/*
- * This is a really stupid program that takes cvsps output, and
- * generates a a long _shell_script_ that will create the GIT archive
- * from it. 
- *
- * You've been warned. I told you it was stupid.
- *
- * NOTE NOTE NOTE! In order to do branches correctly, this needs
- * the fixed cvsps that has the "Ancestor branch" tag output.
- * Hopefully David Mansfield will update his distribution soon
- * enough (he's the one who wrote the patch, so at least we don't
- * have to figt maintainer issues ;)
- *
- * Usage:
- *
- *     TZ=UTC cvsps -A |
- *             git-cvs2git --cvsroot=[root] --module=[module] > script
- *
- * Creates a shell script that will generate the .git archive of
- * the names CVS repository.
- *
- *     TZ=UTC cvsps -s 1234- -A |
- *             git-cvs2git -u --cvsroot=[root] --module=[module] > script
- *
- * Creates a shell script that will update the .git archive with
- * CVS changes from patchset 1234 until the last one.
- *
- * IMPORTANT NOTE ABOUT "cvsps"! This requires version 2.1 or better,
- * and the "TZ=UTC" and the "-A" flag is required for sane results!
- */
-enum state {
-       Header,
-       Log,
-       Members
-};
-
-static const char *cvsroot;
-static const char *cvsmodule;
-
-static char date[100];
-static char author[100];
-static char branch[100];
-static char ancestor[100];
-static char tag[100];
-static char log[32768];
-static int loglen = 0;
-static int initial_commit = 1;
-
-static void lookup_author(char *n, char **name, char **email)
-{
-       /*
-        * FIXME!!! I'm lazy and stupid.
-        *
-        * This could be something like
-        *
-        *      printf("lookup_author '%s'\n", n);
-        *      *name = "$author_name";
-        *      *email = "$author_email";
-        *
-        * and that would allow the script to do its own
-        * lookups at run-time.
-        */
-       *name = n;
-       *email = n;
-}
-
-static void prepare_commit(void)
-{
-       char *author_name, *author_email;
-       char *src_branch;
-
-       lookup_author(author, &author_name, &author_email);
-
-       printf("export GIT_COMMITTER_NAME=%s\n", author_name);
-       printf("export GIT_COMMITTER_EMAIL=%s\n", author_email);
-       printf("export GIT_COMMITTER_DATE='+0000 %s'\n", date);
-
-       printf("export GIT_AUTHOR_NAME=%s\n", author_name);
-       printf("export GIT_AUTHOR_EMAIL=%s\n", author_email);
-       printf("export GIT_AUTHOR_DATE='+0000 %s'\n", date);
-
-       if (initial_commit)
-               return;
-
-       src_branch = *ancestor ? ancestor : branch;
-       if (!strcmp(src_branch, "HEAD"))
-               src_branch = "master";
-       printf("ln -sf refs/heads/'%s' .git/HEAD\n", src_branch);
-
-       /*
-        * Even if cvsps claims an ancestor, we'll let the new
-        * branch name take precedence if it already exists
-        */
-       if (*ancestor) {
-               src_branch = branch;
-               if (!strcmp(src_branch, "HEAD"))
-                       src_branch = "master";
-               printf("[ -e .git/refs/heads/'%s' ] && ln -sf refs/heads/'%s' .git/HEAD\n",
-                       src_branch, src_branch);
-       }
-
-       printf("git-read-tree -m HEAD || exit 1\n");
-       printf("git-checkout-cache -f -u -a\n");
-}
-
-static void commit(void)
-{
-       const char *cmit_parent = initial_commit ? "" : "-p HEAD";
-       const char *dst_branch;
-       char *space;
-       int i;
-
-       printf("tree=$(git-write-tree)\n");
-       printf("cat > .cmitmsg <<EOFMSG\n");
-
-       /* Escape $ characters, and remove control characters */
-       for (i = 0; i < loglen; i++) {
-               unsigned char c = log[i];
-
-               switch (c) {
-               case '$':
-               case '\\':
-               case '`':
-                       putchar('\\');
-                       break;
-               case 0 ... 31:
-                       if (c == '\n' || c == '\t')
-                               break;
-               case 128 ... 159:
-                       continue;
-               }
-               putchar(c);
-       }
-       printf("\nEOFMSG\n");
-       printf("commit=$(cat .cmitmsg | git-commit-tree $tree %s)\n", cmit_parent);
-
-       dst_branch = branch;
-       if (!strcmp(dst_branch, "HEAD"))
-               dst_branch = "master";
-
-       printf("echo $commit > .git/refs/heads/'%s'\n", dst_branch);
-
-       space = strchr(tag, ' ');
-       if (space)
-               *space = 0;
-       if (strcmp(tag, "(none)"))
-               printf("echo $commit > .git/refs/tags/'%s'\n", tag);
-
-       printf("echo 'Committed (to %s):' ; cat .cmitmsg; echo\n", dst_branch);
-
-       *date = 0;
-       *author = 0;
-       *branch = 0;
-       *ancestor = 0;
-       *tag = 0;
-       loglen = 0;
-
-       initial_commit = 0;
-}
-
-static void update_file(char *line)
-{
-       char *name, *version;
-       char *dir;
-
-       while (isspace(*line))
-               line++;
-       name = line;
-       line = strchr(line, ':');
-       if (!line)
-               return;
-       *line++ = 0;
-       line = strchr(line, '>');
-       if (!line)
-               return;
-       *line++ = 0;
-       version = line;
-       line = strchr(line, '(');
-       if (line) {     /* "(DEAD)" */
-               printf("git-update-cache --force-remove '%s'\n", name);
-               return;
-       }
-
-       dir = strrchr(name, '/');
-       if (dir)
-               printf("mkdir -p %.*s\n", (int)(dir - name), name);
-
-       printf("cvs -q -d %s checkout -d .git-tmp -r%s '%s/%s'\n", 
-               cvsroot, version, cvsmodule, name);
-       printf("mv -f .git-tmp/%s %s\n", dir ? dir+1 : name, name);
-       printf("rm -rf .git-tmp\n");
-       printf("git-update-cache --add -- '%s'\n", name);
-}
-
-struct hdrentry {
-       const char *name;
-       char *dest;
-} hdrs[] = {
-       { "Date:", date },
-       { "Author:", author },
-       { "Branch:", branch },
-       { "Ancestor branch:", ancestor },
-       { "Tag:", tag },
-       { "Log:", NULL },
-       { NULL, NULL }
-};
-
-int main(int argc, char **argv)
-{
-       static char line[1000];
-       enum state state = Header;
-       int i;
-
-       for (i = 1; i < argc; i++) {
-               const char *arg = argv[i];
-               if (!memcmp(arg, "--cvsroot=", 10)) {
-                       cvsroot = arg + 10;
-                       continue;
-               }
-               if (!memcmp(arg, "--module=", 9)) {
-                       cvsmodule = arg+9;
-                       continue;
-               } 
-               if (!strcmp(arg, "-v")) {
-                       verbose = 1;
-                       continue;
-               }
-               if (!strcmp(arg, "-u")) {
-                       initial_commit = 0;
-                       continue;
-               }
-       }
-
-
-       if (!cvsroot)
-               cvsroot = getenv("CVSROOT");
-
-       if (!cvsmodule || !cvsroot) {
-               fprintf(stderr, "I need a CVSROOT and module name\n");
-               exit(1);
-       }
-
-       if (initial_commit) {
-               printf("[ -d .git ] && exit 1\n");
-                   printf("git-init-db\n");
-               printf("mkdir -p .git/refs/heads\n");
-               printf("mkdir -p .git/refs/tags\n");
-               printf("ln -sf refs/heads/master .git/HEAD\n");
-       }
-
-       while (fgets(line, sizeof(line), stdin) != NULL) {
-               int linelen = strlen(line);
-
-               while (linelen && isspace(line[linelen-1]))
-                       line[--linelen] = 0;
-
-               switch (state) {
-               struct hdrentry *entry;
-
-               case Header:
-                       if (verbose)
-                               printf("# H: %s\n", line);
-                       for (entry = hdrs ; entry->name ; entry++) {
-                               int len = strlen(entry->name);
-                               char *val;
-
-                               if (memcmp(entry->name, line, len))
-                                       continue;
-                               if (!entry->dest) {
-                                       state = Log;
-                                       break;
-                               }
-                               val = line + len;
-                               linelen -= len;
-                               while (isspace(*val)) {
-                                       val++;
-                                       linelen--;
-                               }
-                               memcpy(entry->dest, val, linelen+1);
-                               break;
-                       }
-                       continue;
-
-               case Log:
-                       if (verbose)
-                               printf("# L: %s\n", line);
-                       if (!strcmp(line, "Members:")) {
-                               while (loglen && isspace(log[loglen-1]))
-                                       log[--loglen] = 0;
-                               prepare_commit();
-                               state = Members;
-                               continue;
-                       }
-                               
-                       if (loglen + linelen + 5 > sizeof(log))
-                               continue;
-                       memcpy(log + loglen, line, linelen);
-                       loglen += linelen;
-                       log[loglen++] = '\n';
-                       continue;
-
-               case Members:
-                       if (verbose)
-                               printf("# M: %s\n", line);
-                       if (!linelen) {
-                               commit();
-                               state = Header;
-                               continue;
-                       }
-                       update_file(line);
-                       continue;
-               }
-       }
-       return 0;
-}
index 0ba67461da47a2fb0a0d31e955b184218734673b..e480a50f4888369b1b1f7c27671ea803d4e4279d 100755 (executable)
-#!/bin/sh
+#!/usr/bin/perl -w
 
-usage () {
-       echo "Usage: git cvsimport [-v] [-z fuzz] <cvsroot> <module>"
-       exit 1
+# This tool is copyright (c) 2005, Matthias Urlichs.
+# It is released under the Gnu Public License, version 2.
+#
+# The basic idea is to aggregate CVS check-ins into related changes.
+# Fortunately, "cvsps" does that for us; all we have to do is to parse
+# its output.
+#
+# Checking out the files is done by a single long-running CVS connection
+# / server process.
+#
+# The head revision is on branch "origin" by default.
+# You can change that with the '-o' option.
+
+use strict;
+use warnings;
+use Getopt::Std;
+use File::Path qw(mkpath);
+use File::Basename qw(basename dirname);
+use Time::Local;
+use POSIX qw(strftime);
+
+$SIG{'PIPE'}="IGNORE";
+$ENV{'TZ'}="UTC";
+
+our($opt_h,$opt_o,$opt_v);
+
+sub usage() {
+       print STDERR <<END;
+Usage: ${\basename $0}  -- fetch/update GIT from CVS
+       [ -h (help) ]
+          [ -v (verbose) ] [ -o name-of-HEAD ]
+       CVS_archive GIT_dest
+END
+       exit(1);
+}
+
+getopts("hqvo:") or usage();
+usage if $opt_h;
+
+@ARGV == 2 or usage();
+$opt_o ||= "origin";
+
+my($cvs_tree, $git_tree) = @ARGV;
+
+select(STDERR); $|=1; select(STDOUT);
+
+
+package CVSconn;
+# Basic CVS dialog.
+# We're only interested in downloading files.
+
+sub new {
+       my($what,$repo,$subdir) = @_;
+       $what=ref($what) if ref($what);
+
+       my $self = {};
+       $self->{'buffer'} = "";
+       bless($self,$what);
+
+       $repo =~ s#/+$##;
+       $self->{'fullrep'} = $repo;
+       $self->conn();
+
+       $self->{'subdir'} = $subdir;
+       $self->{'lines'} = undef;
+
+       return $self;
+}
+
+sub conn {
+       my $self = shift;
+       my $repo = $self->{'fullrep'};
+       if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
+               my($user,$pass,$serv,$port) = ($1,$2,$3,$4);
+               $user="anonymous" unless defined $user;
+               my $rr2;
+               unless($port) {
+                       $rr2 = ":pserver:$user\@$serv:$repo";
+                       $port=2401;
+               }
+               my $rr = ":pserver:$user\@$serv:$port$repo";
+
+               unless($pass) {
+                       open(H,$ENV{'HOME'}."/.cvspass") and do {
+                               # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
+                               while(<H>) {
+                                       chomp;
+                                       s/^\/\d+\s+//;
+                                       my ($w,$p) = split(/\s/,$_,2);
+                                       if($w eq $rr or $w eq $rr2) {
+                                               $pass = $p;
+                                               last;
+                                       }
+                               }
+                       };
+               }
+               $pass="A" unless $pass;
+
+               use IO::Socket;
+               my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
+               die "Socket to $serv: $!\n" unless defined $s;
+               $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
+                       or die "Write to $serv: $!\n";
+               $s->flush();
+
+               my $rep = <$s>;
+
+               if($rep ne "I LOVE YOU\n") {
+                       $rep="<unknown>" unless $rep;
+                       die "AuthReply: $rep\n";
+               }
+               $self->{'socketo'} = $s;
+               $self->{'socketi'} = $s;
+       } else { # local: Fork off our own cvs server.
+               use IO::Pipe;
+               my $pr = IO::Pipe->new();
+               my $pw = IO::Pipe->new();
+               my $pid = fork();
+               die "Fork: $!\n" unless defined $pid;
+               unless($pid) {
+                       $pr->writer();
+                       $pw->reader();
+                       use POSIX qw(dup2);
+                       dup2($pw->fileno(),0);
+                       dup2($pr->fileno(),1);
+                       $pr->close();
+                       $pw->close();
+                       exec("cvs","server");
+               }
+               $pw->writer();
+               $pr->reader();
+               $self->{'socketo'} = $pw;
+               $self->{'socketi'} = $pr;
+       }
+       $self->{'socketo'}->write("Root $repo\n");
+
+       # Trial and error says that this probably is the minimum set
+       $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E F Checked-in Created Updated Merged Removed\n");
+
+       $self->{'socketo'}->write("valid-requests\n");
+       $self->{'socketo'}->flush();
+
+       chomp(my $rep=$self->readline());
+       if($rep !~ s/^Valid-requests\s*//) {
+               $rep="<unknown>" unless $rep;
+               die "Expected Valid-requests from server, but got: $rep\n";
+       }
+       chomp(my $res=$self->readline());
+       die "validReply: $res\n" if $res ne "ok";
+
+       $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
+       $self->{'repo'} = $repo;
+}
+
+sub readline {
+       my($self) = @_;
+       return $self->{'socketi'}->getline();
+}
+
+sub _file {
+       # Request a file with a given revision.
+       # Trial and error says this is a good way to do it. :-/
+       my($self,$fn,$rev) = @_;
+       $self->{'socketo'}->write("Argument -N\n") or return undef;
+       $self->{'socketo'}->write("Argument -P\n") or return undef;
+       # $self->{'socketo'}->write("Argument -ko\n") or return undef;
+       # -ko: Linus' version doesn't use it
+       $self->{'socketo'}->write("Argument -r\n") or return undef;
+       $self->{'socketo'}->write("Argument $rev\n") or return undef;
+       $self->{'socketo'}->write("Argument --\n") or return undef;
+       $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
+       $self->{'socketo'}->write("Directory .\n") or return undef;
+       $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
+       $self->{'socketo'}->write("Sticky T1.1\n") or return undef;
+       $self->{'socketo'}->write("co\n") or return undef;
+       $self->{'socketo'}->flush() or return undef;
+       $self->{'lines'} = 0;
+       return 1;
+}
+sub _line {
+       # Read a line from the server.
+       # ... except that 'line' may be an entire file. ;-)
+       my($self) = @_;
+       die "Not in lines" unless defined $self->{'lines'};
+
+       my $line;
+       my $res="";
+       while(defined($line = $self->readline())) {
+               # M U gnupg-cvs-rep/AUTHORS
+               # Updated gnupg-cvs-rep/
+               # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
+               # /AUTHORS/1.1///T1.1
+               # u=rw,g=rw,o=rw
+               # 0
+               # ok
+
+               if($line =~ s/^(?:Created|Updated) //) {
+                       $line = $self->readline(); # path
+                       $line = $self->readline(); # Entries line
+                       my $mode = $self->readline(); chomp $mode;
+                       $self->{'mode'} = $mode;
+                       defined (my $cnt = $self->readline())
+                               or die "EOF from server after 'Changed'\n";
+                       chomp $cnt;
+                       die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
+                       $line="";
+                       $res="";
+                       while($cnt) {
+                               my $buf;
+                               my $num = $self->{'socketi'}->read($buf,$cnt);
+                               die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
+                               $res .= $buf;
+                               $cnt -= $num;
+                       }
+               } elsif($line =~ s/^ //) {
+                       $res .= $line;
+               } elsif($line =~ /^M\b/) {
+                       # output, do nothing
+               } elsif($line =~ /^Mbinary\b/) {
+                       my $cnt;
+                       die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
+                       chomp $cnt;
+                       die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
+                       $line="";
+                       while($cnt) {
+                               my $buf;
+                               my $num = $self->{'socketi'}->read($buf,$cnt);
+                               die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0;
+                               $res .= $buf;
+                               $cnt -= $num;
+                       }
+               } else {
+                       chomp $line;
+                       if($line eq "ok") {
+                               # print STDERR "S: ok (".length($res).")\n";
+                               return $res;
+                       } elsif($line =~ s/^E //) {
+                               # print STDERR "S: $line\n";
+                       } else {
+                               die "Unknown: $line\n";
+                       }
+               }
+       }
+}
+sub file {
+       my($self,$fn,$rev) = @_;
+       my $res;
+
+       if ($self->_file($fn,$rev)) {
+               $res = $self->_line();
+               return $res if defined $res;
+       }
+
+       # retry
+       $self->conn();
+       $self->_file($fn,$rev)
+               or die "No file command send\n";
+       $res = $self->_line();
+       die "No input: $fn $rev\n" unless defined $res;
+       return $res;
+}
+
+
+package main;
+
+my $cvs = CVSconn->new(dirname($cvs_tree), basename($cvs_tree));
+
+
+sub pdate($) {
+       my($d) = @_;
+       m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?#
+               or die "Unparseable date: $d\n";
+       my $y=$1; $y-=1900 if $y>1900;
+       return timegm($6||0,$5,$4,$3,$2-1,$y);
 }
 
-CVS2GIT=""
-CVSPS="--cvs-direct -x -A"
-while true; do
-       case "$1" in
-       -v) CVS2GIT="$1" ;;
-       -z) shift; CVSPS="$CVSPS -z $1" ;;
-       -*) usage ;;
-       *)  break ;;
-       esac
-       shift
-done
+sub pmode($) {
+       my($mode) = @_;
+       my $m = 0;
+       my $mm = 0;
+       my $um = 0;
+       for my $x(split(//,$mode)) {
+               if($x eq ",") {
+                       $m |= $mm&$um;
+                       $mm = 0;
+                       $um = 0;
+               } elsif($x eq "u") { $um |= 0700;
+               } elsif($x eq "g") { $um |= 0070;
+               } elsif($x eq "o") { $um |= 0007;
+               } elsif($x eq "r") { $mm |= 0444;
+               } elsif($x eq "w") { $mm |= 0222;
+               } elsif($x eq "x") { $mm |= 0111;
+               } elsif($x eq "=") { # do nothing
+               } else { die "Unknown mode: $mode\n";
+               }
+       }
+       $m |= $mm&$um;
+       return $m;
+}
 
-export CVSROOT="$1"
-export MODULE="$2"
-if [ ! "$CVSROOT" ] || [ ! "$MODULE" ] ; then
-       usage
-fi
+my $tmpcv = "/var/cache/cvs";
 
-cvsps -h 2>&1 | grep -q "cvsps version 2.1" >& /dev/null || {
-       echo "I need cvsps version 2.1"
-       exit 1
+sub getwd() {
+       my $pwd = `pwd`;
+       chomp $pwd;
+       return $pwd;
 }
 
-mkdir "$MODULE" || exit 1
-cd "$MODULE"
+-d $git_tree
+       or mkdir($git_tree,0777)
+       or die "Could not create $git_tree: $!";
+chdir($git_tree);
 
-TZ=UTC cvsps $CVSPS $MODULE > .git-cvsps-result
-[ -s .git-cvsps-result ] || exit 1
-git-cvs2git $CVS2GIT --cvsroot="$CVSROOT" --module="$MODULE" < .git-cvsps-result > .git-create-script || exit 1
-sh .git-create-script
+my $last_branch = "";
+my %branch_date;
+
+my $git_dir = $ENV{"GIT_DIR"} || ".git";
+$git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
+$ENV{"GIT_DIR"} = $git_dir;
+unless(-d $git_dir) {
+       system("git-init-db");
+       die "Cannot init the GIT db at $git_tree: $?\n" if $?;
+       system("git-read-tree");
+       die "Cannot init an empty tree: $?\n" if $?;
+
+       $last_branch = $opt_o;
+} else {
+       $last_branch = basename(readlink("$git_dir/HEAD"));
+       die "Cannot read the last branch name: $!\n" unless $last_branch;
+
+       # Get the last import timestamps
+       opendir(D,"$git_dir/refs/heads");
+       while(defined(my $head = readdir(D))) {
+               next if $head =~ /^\./;
+               open(F,"$git_dir/refs/heads/$head")
+                       or die "Bad head branch: $head: $!\n";
+               chomp(my $ftag = <F>);
+               close(F);
+               open(F,"git-cat-file commit $ftag |");
+               while(<F>) {
+                       next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/;
+                       $branch_date{$head} = $1;
+                       last;
+               }
+               close(F);
+       }
+       closedir(D);
+}
+
+-d $git_dir
+       or die "Could not create git subdir ($git_dir).\n";
+
+my $pid = open(CVS,"-|");
+die "Cannot fork: $!\n" unless defined $pid;
+unless($pid) {
+       exec("cvsps","-A","--cvs-direct",$cvs_tree);
+       die "Could not start cvsps: $!\n";
+}
+
+
+## cvsps output:
+#---------------------
+#PatchSet 314
+#Date: 1999/09/18 13:03:59
+#Author: wkoch
+#Branch: STABLE-BRANCH-1-0
+#Ancestor branch: HEAD
+#Tag: (none)
+#Log:
+#    See ChangeLog: Sat Sep 18 13:03:28 CEST 1999  Werner Koch
+#Members:
+#      README:1.57->1.57.2.1
+#      VERSION:1.96->1.96.2.1
+#
+#---------------------
+
+my $state = 0;
+
+my($patchset,$date,$author,$branch,$ancestor,$tag,$logmsg);
+my(@old,@new);
+my $commit = sub {
+       my $pid;
+       system("git-update-cache","--force-remove","--",@old) if @old;
+       die "Cannot remove files: $?\n" if $?;
+       system("git-update-cache","--add","--",@new) if @new;
+       die "Cannot add files: $?\n" if $?;
+
+       $pid = open(C,"-|");
+       die "Cannot fork: $!" unless defined $pid;
+       unless($pid) {
+               exec("git-write-tree");
+               die "Cannot exec git-write-tree: $!\n";
+       }
+       chomp(my $tree = <C>);
+       length($tree) == 40
+               or die "Cannot get tree id ($tree): $!\n";
+       close(C)
+               or die "Error running git-write-tree: $?\n";
+       print "Tree ID $tree\n" if $opt_v;
+
+       my $parent = "";
+       if(open(C,"$git_dir/refs/heads/$last_branch")) {
+               chomp($parent = <C>);
+               close(C);
+               length($parent) == 40
+                       or die "Cannot get parent id ($parent): $!\n";
+               print "Parent ID $parent\n" if $opt_v;
+       }
+
+       pipe(I,O)
+               or die "No pipe: $!\n";
+       $pid = open(C,"|-");
+       die "Cannot fork: $!" unless defined $pid;
+       unless($pid) {
+               close(I);
+               open(STDOUT,">&O");
+               my @par = ();
+               @par = ("-p",$parent) if $parent;
+               exec("env",
+                       "GIT_AUTHOR_NAME=$author",
+                       "GIT_AUTHOR_EMAIL=$author",
+                       "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
+                       "GIT_COMMITTER_NAME=$author",
+                       "GIT_COMMITTER_EMAIL=$author",
+                       "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
+                       "git-commit-tree", $tree,@par);
+               die "Cannot exec git-commit-tree: $!\n";
+       }
+       close(O);
+       print C $logmsg
+               or die "Error writing to git-commit-tree: $!\n";
+       close(C)
+               or die "Error running git-commit-tree: $?\n";
+       print "Committed patch $patchset ($branch)\n" if $opt_v;
+       chomp(my $cid = <I>);
+       length($cid) == 40
+               or die "Cannot get commit id ($cid): $!\n";
+       print "Commit ID $cid\n" if $opt_v;
+       close(I);
+
+       open(C,">$git_dir/refs/heads/$branch")
+               or die "Cannot open branch $branch for update: $!\n";
+       print C "$cid\n"
+               or die "Cannot write branch $branch for update: $!\n";
+       close(C)
+               or die "Cannot write branch $branch for update: $!\n";
+
+       if($tag) {
+               open(C,">$git_dir/refs/tags/$tag")
+                       or die "Cannot create tag $tag: $!\n";
+               print C "$cid\n"
+                       or die "Cannot write tag $branch: $!\n";
+               close(C)
+                       or die "Cannot write tag $branch: $!\n";
+               print "Created tag '$tag' on '$branch'\n" if $opt_v;
+       }
+
+       @old = ();
+       @new = ();
+};
+
+while(<CVS>) {
+       chomp;
+       if($state == 0 and /^-+$/) {
+               $state = 1;
+       } elsif($state == 0) {
+               $state = 1;
+               redo;
+       } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) {
+               $patchset = 0+$_;
+               $state=2;
+       } elsif($state == 2 and s/^Date:\s+//) {
+               $date = pdate($_);
+               unless($date) {
+                       print STDERR "Could not parse date: $_\n";
+                       $state=0;
+                       next;
+               }
+               $state=3;
+       } elsif($state == 3 and s/^Author:\s+//) {
+               s/\s+$//;
+               $author = $_;
+               $state = 4;
+       } elsif($state == 4 and s/^Branch:\s+//) {
+               s/\s+$//;
+               $branch = $_;
+               $state = 5;
+       } elsif($state == 5 and s/^Ancestor branch:\s+//) {
+               s/\s+$//;
+               $ancestor = $_;
+               $ancestor = $opt_o if $ancestor == "HEAD";
+               $state = 6;
+       } elsif($state == 5) {
+               $ancestor = undef;
+               $state = 6;
+               redo;
+       } elsif($state == 6 and s/^Tag:\s+//) {
+               s/\s+$//;
+               if($_ eq "(none)") {
+                       $tag = undef;
+               } else {
+                       $tag = $_;
+               }
+               $state = 7;
+       } elsif($state == 7 and /^Log:/) {
+               $logmsg = "";
+               $state = 8;
+       } elsif($state == 8 and /^Members:/) {
+               $branch = $opt_o if $branch eq "HEAD";
+               if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
+                       # skip
+                       print "skip patchset $patchset: $date before $branch_date{$branch}\n";
+                       $state = 11;
+                       next;
+               }
+               if($ancestor) {
+                       if(-f "$git_dir/refs/heads/$branch") {
+                               print STDERR "Branch $branch already exists!\n";
+                               $state=11;
+                               next;
+                       }
+                       unless(open(H,"$git_dir/refs/heads/$ancestor")) {
+                               print STDERR "Branch $ancestor does not exist!\n";
+                               $state=11;
+                               next;
+                       }
+                       chomp(my $id = <H>);
+                       close(H);
+                       unless(open(H,"> $git_dir/refs/heads/$branch")) {
+                               print STDERR "Could not create branch $branch: $!\n";
+                               $state=11;
+                               next;
+                       }
+                       print H "$id\n"
+                               or die "Could not write branch $branch: $!";
+                       close(H)
+                               or die "Could not write branch $branch: $!";
+               }
+               if(($ancestor || $branch) ne $last_branch) {
+                       system("git-read-tree -m -u $last_branch $branch");
+                       die "read-tree $branch failed at $branch: $?\n" if $?;
+               }
+               if($branch ne $last_branch) {
+                       unlink("$git_dir/HEAD");
+                       symlink("refs/heads/$branch","$git_dir/HEAD");
+                       $last_branch = $branch;
+               }
+               $state = 9;
+       } elsif($state == 8) {
+               $logmsg .= "$_\n";
+       } elsif($state == 9 and /^\s+(\S+):(?:INITIAL|\d(?:\.\d+)+)->(\d(?:\.\d+)+)\s*$/) {
+#      VERSION:1.96->1.96.2.1
+               my $fn = $1;
+               my $data = $cvs->file($fn,$2);
+               print "Update $fn: ".length($data)." bytes.\n";
+               mkpath(dirname($fn),$opt_v);
+               open(F,"> ./$fn")
+                       or die "Cannot create '$fn': $!\n";
+               print F $data
+                       or die "Cannot write to '$fn': $!\n";
+               close(F)
+                       or die "Cannot write to '$fn': $!\n";
+               chmod(pmode($cvs->{'mode'}), $fn);
+               push(@new,$fn); # may be resurrected!
+       } elsif($state == 9 and /^\s+(\S+):\d(?:\.\d+)+->(\d(?:\.\d+)+)\(DEAD\)\s*$/) {
+               push(@old,$1);
+       } elsif($state == 9 and /^\s*$/) {
+               $state = 10;
+       } elsif(($state == 9 or $state == 10) and /^-+$/) {
+               &$commit();
+               $state = 1;
+       } elsif($state == 11 and /^-+$/) {
+               $state = 1;
+       } elsif(/^-+$/) { # end of unknown-line processing
+               $state = 1;
+       } elsif($state != 11) { # ignore stuff when skipping
+               print "* UNKNOWN LINE * $_\n";
+       }
+}
+&$commit() if $branch and $state != 11;
 
+print "DONE\n" if $opt_v;