svn2cvs/trunk/svn2cvs.pl

#!/usr/bin/perl -w

# This script will transfer changes from Subversion repository
# to CVS repository (e.g. SourceForge) while preserving commit
# logs.
#
# Based on original shell version by Tollef Fog Heen available at
# http://raw.no/personal/blog
#
# 2004-03-09 Dobrica Pavlinusic <dpavlin@rot13.org>
#
# documentation is after __END__

use strict;
use File::Temp qw/ tempdir /;
use File::Path;
use Data::Dumper;
use XML::Simple;

# do we want to sync just part of repository?
my $partial_import = 1;

if (@ARGV < 2) {
        print "usage: $0 SVN_URL CVSROOT CVSREPOSITORY\n";
        exit 1;
}

my ($SVNROOT,$CVSROOT, $CVSREP) = @ARGV;

if ($SVNROOT !~ m,^[\w+]+:///*\w+,) {
        print "ERROR: invalid svn root $SVNROOT\n";
        exit 1;
}

# Ensure File::Temp::END can clean up:
$SIG{__DIE__} = sub { chdir("/tmp"); die @_ };

my $TMPDIR=tempdir( "/tmp/checkoutXXXXX", CLEANUP => 1 );

sub cd_tmp {
        chdir($TMPDIR) || die "can't cd to $TMPDIR: $!";
}

sub cd_rep {
        chdir("$TMPDIR/$CVSREP") || die "can't cd to $TMPDIR/$CVSREP: $!";
}

print "## using TMPDIR $TMPDIR\n";

# cvs command with root
my $cvs="cvs -d $CVSROOT";

# current revision in CVS
my $rev;

#
# sub to do logging and system calls
#
sub log_system($$) {
        my ($cmd,$errmsg) = @_;
        print STDERR "## $cmd\n";
        system($cmd) == 0 || die "$errmsg: $!";
}

#
# sub to commit .svn rev file later
#
sub commit_svnrev {
        my $rev = shift @_;
        my $add_new = shift @_;

        die "commit_svnrev needs revision" if (! defined($rev));

        open(SVNREV,"> .svnrev") || die "can't open $TMPDIR/$CVSREP/.svnrev: $!";
        print SVNREV $rev;
        close(SVNREV);

        my $path=".svnrev";

        if ($add_new) {
                system "$cvs add $path" || die "cvs add of $path failed: $!";
        } else {
                my $msg="subversion revision $rev commited to CVS";
                print "$msg\n";
                system "$cvs commit -m '$msg' $path" || die "cvs commit of $path failed: $!";
        }
}

sub add_dir($$) {
        my ($path,$msg) = @_;
        print "# add_dir($path)\n";
        die "add_dir($path) is not directory" unless (-d $path);

        my $curr_dir;

        foreach my $d (split(m#/#, $path)) {
                $curr_dir .= ( $curr_dir ? '/' : '') . $d;

                next if in_entries($curr_dir);
                next if (-e "$curr_dir/CVS");

                log_system("$cvs add $curr_dir", "cvs add of $curr_dir failed");
        }
}

# ok, now do the checkout
eval {
        cd_tmp;
        log_system("$cvs -q checkout $CVSREP", "cvs checkout failed");
};

if ($@) {
        print <<_NEW_REP_;

There is no CVS repository '$CVSREP' in your CVS. I will assume that
this is import of new module in your CVS and start from revision 0.

Press enter to continue importing new CVS repository or CTRL+C to abort.

_NEW_REP_

        print "start import of new module [yes]: ";
        my $in = <STDIN>;
        cd_tmp;
        mkdir($CVSREP) || die "can't create $CVSREP: $!";
        cd_rep;

        open(SVNREV,"> .svnrev") || die "can't open $CVSREP/.svnrev: $!";
        print SVNREV "0";
        close(SVNREV);

        $rev = 0;

        # create new module
        cd_rep;
        log_system("$cvs import -d -m 'new CVS module' $CVSREP svn r$rev", "import of new repository");
        cd_tmp;
        rmtree($CVSREP) || die "can't remove $CVSREP";
        log_system("$cvs -q checkout $CVSREP", "cvs checkout failed");
        cd_rep;

} else {
        # import into existing module directory in CVS

        cd_rep;
        # check if svnrev exists
        if (! -e ".svnrev") {
                print <<_USAGE_;

Your CVS repository doesn't have .svnrev file!

This file is used to keep CVS repository and Subversion in sync, so
that only newer changes will be commited.

It's quote possible that this is first svn2cvs run for this repository.
If so, you will have to identify correct svn revision which
corresponds to current version of CVS repository that has just
been checkouted.

If you migrated your cvs repository to svn using cvs2svn, this will be
last Subversion revision. If this is initial run of conversion of
Subversion repository to CVS, correct revision is 0.

_USAGE_

                print "svn revision corresponding to CVS [abort]: ";
                my $in = <STDIN>;
                chomp($in);
                if ($in !~ /^\d+$/) {
                        print "Aborting: revision not a number\n";
                        exit 1;
                } else {
                        $rev = $in;
                        commit_svnrev($rev,1);  # create new
                }
        } else {
                open(SVNREV,".svnrev") || die "can't open $TMPDIR/$CVSREP/.svnrev: $!";
                $rev = <SVNREV>;
                chomp($rev);
                close(SVNREV);
        }

        print "Starting after revision $rev\n";
        $rev++;
}


#
# FIXME!! HEAD should really be next verison and loop because this way we
# loose multiple edits of same file and corresponding messages. On the
# other hand, if you want to compress your traffic to CVS server and don't
# case much about accuracy and completnes of logs there, this might
# be good. YMMV
#
open(LOG, "svn log -r $rev:HEAD -v --xml $SVNROOT |") || die "svn log for repository $SVNROOT failed: $!";
my $log;
while(<LOG>) {
        $log .= $_;
}
close(LOG);


my $xml;
eval {
        $xml = XMLin($log, ForceArray => [ 'logentry', 'path' ]);
};


#=begin log_example
#
#------------------------------------------------------------------------
#r256 | dpavlin | 2004-03-09 13:18:17 +0100 (Tue, 09 Mar 2004) | 2 lines
#
#ported r254 from hidra branch
#
#=cut

my $fmt = "\n" . "-" x 79 . "\nr%5s| %8s | %s\n\n%s\n";

if (! $xml->{'logentry'}) {
        print "no newer log entries in Subversion repostory. CVS is current\n";
        exit 0;
}

# check if file exists in CVS/Entries
sub in_entries($) {
        my $path = shift;
        if ($path !~ m,^(.*?/*)([^/]+)$,) {
                die "can't split '$path' to dir and file!";
        } else {
                my ($d,$f) = ($1,$2);
                if ($d !~ m,/$, && $d ne "") {
                        $d .= "/";
                }
                open(E, $d."CVS/Entries") || return 0;
                while(<E>) {
                        return(1) if (m,^/$f/,);
                }
                close(E);
                return 0;
        }
}

cd_tmp;
cd_rep;

foreach my $e (@{$xml->{'logentry'}}) {
        die "BUG: revision from .svnrev ($rev) greater than from subversion (".$e->{'revision'}.")" if ($rev > $e->{'revision'});
        $rev = $e->{'revision'};
        log_system("svn export --force -q -r $rev $SVNROOT $TMPDIR/$CVSREP", "svn export of revision $rev failed");

        # deduce name of svn directory
        my $SVNREP = "";
        my $tmpsvn = $SVNROOT || die "BUG: SVNROOT empty!";
        my $tmppath = $e->{'paths'}->{'path'}->[0]->{'content'} || die "BUG: tmppath empty!";
        do {
                if ($tmpsvn =~ s#(/[^/]+)/*$##) {
                        $SVNREP = $1 . $SVNREP;
                } elsif ($e->{'paths'}->{'path'}->[0]->{'copyfrom-path'}) {
                        print "NOTICE: copyfrom outside synced repository ignored - skipping\n";
                        next;
                } else {
                        print "NOTICE: can't deduce svn dir from $SVNROOT - skipping\n";
                        next;
                }
        } until ($tmppath =~ m/^$SVNREP/);

        print "NOTICE: using $SVNREP as directory for svn\n";

        printf($fmt, $e->{'revision'}, $e->{'author'}, $e->{'date'}, $e->{'msg'});
        my @commit;

        foreach my $p (@{$e->{'paths'}->{'path'}}) {
                my ($action,$path) = ($p->{'action'},$p->{'content'});

                next if ($path =~ m#/\.svnrev$#);

                print "svn2cvs: $action $path\n";

                # prepare path and message
                my $file = $path;
                if ( $path !~ s#^\Q$SVNREP\E/*## ) {
                        print "NOTICE: skipping '$path' which isn't under repository root '$SVNREP'\n";
                        die unless $partial_import;
                        next;
                }

                if (! $path) {
                        print "NOTICE: skipped this operation. Probably trunk creation\n";
                        next;
                }

                my $msg = $e->{'msg'};
                $msg =~ s/'/'\\''/g;    # quote "

                if ($action =~ /M/) {
                        print "svn2cvs: modify $path -- nop\n";
                } elsif ($action =~ /A/) {
                        if (-d $path) {
                                add_dir($path, $msg);
                        } elsif ($path =~ m,^(.+)/[^/]+$, && ! -e "$1/CVS/Root") {
                                my $dir = $1;
                                in_entries($dir) || add_dir($dir, $msg);
                                in_entries($path) || log_system("$cvs add $path", "cvs add of $path failed");
                        } else {
                                in_entries($path) || log_system("$cvs add $path", "cvs add of $path failed");
                        }
                } elsif ($action =~ /D/) {
                        if (-e $path) {
                                unlink $path || die "can't delete $path: $!";
                                log_system("$cvs delete $path", "cvs delete of $path failed");
                        } else {
                                print "WARNING: $path is not present, skipping...\n";
                                undef $path;
                        }
                } else {
                        print "WARNING: action $action not implemented on $path. Bug or missing feature of $0\n";
                }

                # save commits for later
                push @commit, $path if ($path);

        }

        my $msg = $e->{'msg'};
        $msg =~ s/'/'\\''/g;    # quote "

        # now commit changes
        log_system("$cvs commit -m '$msg' ".join(" ",@commit), "cvs commit of ".join(",",@commit)." failed");

        commit_svnrev($rev);
}

# cd out of $CVSREP before File::Temp::END is called
chdir("/tmp") || die "can't cd to /tmp: $!";

__END__

=pod

=head1 NAME

svn2cvs - save subversion commits to (read-only) cvs repository

=head1 SYNOPSIS

  ./svn2cvs.pl SVN_URL CVSROOT CVSREPOSITORY

Usage example (used to self-host this script):

  ./svn2cvs.pl file:///home/dpavlin/private/svn/svn2cvs/trunk/ \
               :pserver:dpavlin@cvs.tigris.org:/cvs svn2cvs/src

=head1 DESCRIPTION

This script will allows you to commit changes made to Subversion repository to
(read-only) CVS repository manually or from Subversion's C<post-commit> hook.

It's using F<.svnrev> file (which will be created on first run) in 
B<CVSROOT/CVSREPOSITORY> to store last Subversion revision which was
committed into CVS.

One run will do following things:

=over 4

=item *
checkout B<CVSREPOSITORY> from B<CVSROOT> to temporary directory

=item *
check if F<.svnrev> file exists and create it if it doesn't

=item *
loop through all revisions from current in B<CVSROOT/CVSREPOSITORY> (using
F<.svnrev>) up to B<HEAD> (current one)

=over 5

=item *
checkout next Subversion revision from B<SVN_URL> over CVS checkout
temporary directory

=item *
make modification (add and/or delete) done in that revision

=item *
commit modification (added, deleted or modified files/dirs) while
preserving original message from CVS

=item *
update F<.svnrev> to match current revision

=back

=item *
cleanup temporary directory

=back

If checkout fails for some reason (e.g. flaky ssh connection), you will
still have valid CVS repository, so all you have to do is run B<svn2cvs.pl>
again.

=head1 WARNINGS

"Cheap" copy operations in Subversion are not at all cheap in CVS. They will
create multiple copies of files in CVS repository!

This script assume that you want to sync your C<trunk> (or any other
directory for that matter) directory with CVS, not root of your subversion.
This might be considered bug, but since common practise is to have
directories C<trunk> and C<branches> in svn and source code in them, it's
not serious limitation.

=head1 RELATED PROJECTS

B<Subversion> L<http://subversion.tigris.org/> version control system that is a
compelling replacement for CVS in the open source community.

B<cvs2svn> L<http://cvs2svn.tigris.org/> converts a CVS repository to a
Subversion repository. It is designed for one-time conversions, not for
repeated synchronizations between CVS and Subversion.

=head1 CHANGES

Versions of this utility are actually Subversion repository revisions,
so they might not be in sequence.

=over 3

=item r10

First release available to public

=item r15

Addition of comprehensive documentation, fixes for quoting in commit
messages, and support for skipping changes which are not under current
Subversion checkout root (e.g. branches).

=item r18

Support for importing your svn into empty CVS repository (it will first
create module and than dump all revisions).
Group commit operations to save round-trips to CVS server.
Documentation improvements and other small fixes.

=item r20

Fixed path deduction (overlap between Subversion reporistory and CVS checkout).

=item r21

Use C<update -d> instead of checkout after import.
Added fixes by Paul Egan <paulegan@mail.com> for XMLin and fixing working
directory.

=item r22

Rewritten import from revision 0 to empty repository, better importing
of deep directory structures, initial support for recovery from partial
commit.

=back

=head1 AUTHOR

Dobrica Pavlinusic <dpavlin@rot13.org>

L<https://www.rot13.org/~dpavlin/>

=head1 LICENSE

This product is licensed under GNU Public License (GPL) v2 or later.

=cut

1	dpavlin	1	#!/usr/bin/perl -w
2
3			# This script will transfer changes from Subversion repository
4			# to CVS repository (e.g. SourceForge) while preserving commit
5			# logs.
6			#
7			# Based on original shell version by Tollef Fog Heen available at
8			# http://raw.no/personal/blog
9			#
10			# 2004-03-09 Dobrica Pavlinusic <dpavlin@rot13.org>
11	dpavlin	12	#
12			# documentation is after __END__
13	dpavlin	1
14			use strict;
15			use File::Temp qw/ tempdir /;
16	dpavlin	21	use File::Path;
17	dpavlin	1	use Data::Dumper;
18			use XML::Simple;
19
20	dpavlin	27	# do we want to sync just part of repository?
21			my $partial_import = 1;
22
23	dpavlin	8	if (@ARGV < 2) {
24			print "usage: $0 SVN_URL CVSROOT CVSREPOSITORY\n";
25			exit 1;
26			}
27	dpavlin	1
28	dpavlin	8	my ($SVNROOT,$CVSROOT, $CVSREP) = @ARGV;
29	dpavlin	1
30	dpavlin	10	if ($SVNROOT !~ m,^[\w+]+:///*\w+,) {
31	dpavlin	8	print "ERROR: invalid svn root $SVNROOT\n";
32			exit 1;
33			}
34	dpavlin	7
35	dpavlin	21	# Ensure File::Temp::END can clean up:
36			$SIG{__DIE__} = sub { chdir("/tmp"); die @_ };
37
38	dpavlin	1	my $TMPDIR=tempdir( "/tmp/checkoutXXXXX", CLEANUP => 1 );
39
40	dpavlin	22	sub cd_tmp {
41			chdir($TMPDIR) \|\| die "can't cd to $TMPDIR: $!";
42			}
43	dpavlin	1
44	dpavlin	22	sub cd_rep {
45			chdir("$TMPDIR/$CVSREP") \|\| die "can't cd to $TMPDIR/$CVSREP: $!";
46			}
47
48			print "## using TMPDIR $TMPDIR\n";
49
50	dpavlin	1	# cvs command with root
51			my $cvs="cvs -d $CVSROOT";
52
53	dpavlin	22	# current revision in CVS
54			my $rev;
55
56	dpavlin	1	#
57			# sub to do logging and system calls
58			#
59			sub log_system($$) {
60			my ($cmd,$errmsg) = @_;
61			print STDERR "## $cmd\n";
62	dpavlin	8	system($cmd) == 0 \|\| die "$errmsg: $!";
63	dpavlin	1	}
64
65	dpavlin	3	#
66			# sub to commit .svn rev file later
67			#
68			sub commit_svnrev {
69			my $rev = shift @_;
70			my $add_new = shift @_;
71	dpavlin	1
72	dpavlin	3	die "commit_svnrev needs revision" if (! defined($rev));
73
74	dpavlin	7	open(SVNREV,"> .svnrev") \|\| die "can't open $TMPDIR/$CVSREP/.svnrev: $!";
75	dpavlin	3	print SVNREV $rev;
76			close(SVNREV);
77
78			my $path=".svnrev";
79
80			if ($add_new) {
81	dpavlin	7	system "$cvs add $path" \|\| die "cvs add of $path failed: $!";
82	dpavlin	4	} else {
83			my $msg="subversion revision $rev commited to CVS";
84			print "$msg\n";
85	dpavlin	11	system "$cvs commit -m '$msg' $path" \|\| die "cvs commit of $path failed: $!";
86	dpavlin	3	}
87			}
88
89	dpavlin	22	sub add_dir($$) {
90			my ($path,$msg) = @_;
91			print "# add_dir($path)\n";
92			die "add_dir($path) is not directory" unless (-d $path);
93	dpavlin	18
94	dpavlin	22	my $curr_dir;
95
96			foreach my $d (split(m#/#, $path)) {
97			$curr_dir .= ( $curr_dir ? '/' : '') . $d;
98
99			next if in_entries($curr_dir);
100			next if (-e "$curr_dir/CVS");
101
102			log_system("$cvs add $curr_dir", "cvs add of $curr_dir failed");
103			}
104			}
105
106	dpavlin	1	# ok, now do the checkout
107	dpavlin	18	eval {
108	dpavlin	22	cd_tmp;
109	dpavlin	18	log_system("$cvs -q checkout $CVSREP", "cvs checkout failed");
110			};
111	dpavlin	1
112	dpavlin	18	if ($@) {
113			print <<_NEW_REP_;
114	dpavlin	1
115	dpavlin	18	There is no CVS repository '$CVSREP' in your CVS. I will assume that
116			this is import of new module in your CVS and start from revision 0.
117	dpavlin	7
118	dpavlin	18	Press enter to continue importing new CVS repository or CTRL+C to abort.
119	dpavlin	7
120	dpavlin	18	_NEW_REP_
121	dpavlin	3
122	dpavlin	18	print "start import of new module [yes]: ";
123			my $in = <STDIN>;
124	dpavlin	22	cd_tmp;
125	dpavlin	18	mkdir($CVSREP) \|\| die "can't create $CVSREP: $!";
126	dpavlin	22	cd_rep;
127	dpavlin	1
128	dpavlin	18	open(SVNREV,"> .svnrev") \|\| die "can't open $CVSREP/.svnrev: $!";
129			print SVNREV "0";
130			close(SVNREV);
131
132			$rev = 0;
133
134			# create new module
135	dpavlin	22	cd_rep;
136			log_system("$cvs import -d -m 'new CVS module' $CVSREP svn r$rev", "import of new repository");
137			cd_tmp;
138			rmtree($CVSREP) \|\| die "can't remove $CVSREP";
139			log_system("$cvs -q checkout $CVSREP", "cvs checkout failed");
140			cd_rep;
141	dpavlin	18
142			} else {
143			# import into existing module directory in CVS
144
145	dpavlin	22	cd_rep;
146	dpavlin	18	# check if svnrev exists
147			if (! -e ".svnrev") {
148			print <<_USAGE_;
149
150	dpavlin	3	Your CVS repository doesn't have .svnrev file!
151	dpavlin	1
152	dpavlin	12	This file is used to keep CVS repository and Subversion in sync, so
153	dpavlin	3	that only newer changes will be commited.
154	dpavlin	1
155	dpavlin	3	It's quote possible that this is first svn2cvs run for this repository.
156			If so, you will have to identify correct svn revision which
157			corresponds to current version of CVS repository that has just
158			been checkouted.
159	dpavlin	1
160	dpavlin	3	If you migrated your cvs repository to svn using cvs2svn, this will be
161	dpavlin	12	last Subversion revision. If this is initial run of conversion of
162			Subversion repository to CVS, correct revision is 0.
163	dpavlin	1
164			_USAGE_
165	dpavlin	3
166	dpavlin	18	print "svn revision corresponding to CVS [abort]: ";
167			my $in = <STDIN>;
168			chomp($in);
169			if ($in !~ /^\d+$/) {
170			print "Aborting: revision not a number\n";
171			exit 1;
172			} else {
173			$rev = $in;
174			commit_svnrev($rev,1); # create new
175			}
176	dpavlin	3	} else {
177	dpavlin	18	open(SVNREV,".svnrev") \|\| die "can't open $TMPDIR/$CVSREP/.svnrev: $!";
178			$rev = <SVNREV>;
179			chomp($rev);
180			close(SVNREV);
181	dpavlin	3	}
182	dpavlin	18
183			print "Starting after revision $rev\n";
184			$rev++;
185	dpavlin	1	}
186
187
188			#
189			# FIXME!! HEAD should really be next verison and loop because this way we
190			# loose multiple edits of same file and corresponding messages. On the
191			# other hand, if you want to compress your traffic to CVS server and don't
192			# case much about accuracy and completnes of logs there, this might
193			# be good. YMMV
194			#
195	dpavlin	8	open(LOG, "svn log -r $rev:HEAD -v --xml $SVNROOT \|") \|\| die "svn log for repository $SVNROOT failed: $!";
196	dpavlin	1	my $log;
197			while(<LOG>) {
198			$log .= $_;
199			}
200			close(LOG);
201
202
203	dpavlin	21	my $xml;
204			eval {
205			$xml = XMLin($log, ForceArray => [ 'logentry', 'path' ]);
206			};
207	dpavlin	1
208	dpavlin	21
209	dpavlin	12	#=begin log_example
210			#
211			#------------------------------------------------------------------------
212			#r256 \| dpavlin \| 2004-03-09 13:18:17 +0100 (Tue, 09 Mar 2004) \| 2 lines
213			#
214			#ported r254 from hidra branch
215			#
216			#=cut
217	dpavlin	1
218			my $fmt = "\n" . "-" x 79 . "\nr%5s\| %8s \| %s\n\n%s\n";
219
220	dpavlin	2	if (! $xml->{'logentry'}) {
221	dpavlin	12	print "no newer log entries in Subversion repostory. CVS is current\n";
222	dpavlin	2	exit 0;
223			}
224
225	dpavlin	14	# check if file exists in CVS/Entries
226			sub in_entries($) {
227			my $path = shift;
228			if ($path !~ m,^(.?/)([^/]+)$,) {
229			die "can't split '$path' to dir and file!";
230			} else {
231			my ($d,$f) = ($1,$2);
232	dpavlin	17	if ($d !~ m,/$, && $d ne "") {
233	dpavlin	14	$d .= "/";
234			}
235	dpavlin	21	open(E, $d."CVS/Entries") \|\| return 0;
236	dpavlin	14	while(<E>) {
237			return(1) if (m,^/$f/,);
238			}
239			close(E);
240			return 0;
241			}
242			}
243
244	dpavlin	22	cd_tmp;
245			cd_rep;
246	dpavlin	21
247	dpavlin	1	foreach my $e (@{$xml->{'logentry'}}) {
248			die "BUG: revision from .svnrev ($rev) greater than from subversion (".$e->{'revision'}.")" if ($rev > $e->{'revision'});
249			$rev = $e->{'revision'};
250	dpavlin	8	log_system("svn export --force -q -r $rev $SVNROOT $TMPDIR/$CVSREP", "svn export of revision $rev failed");
251	dpavlin	1
252	dpavlin	8	# deduce name of svn directory
253			my $SVNREP = "";
254			my $tmpsvn = $SVNROOT \|\| die "BUG: SVNROOT empty!";
255			my $tmppath = $e->{'paths'}->{'path'}->[0]->{'content'} \|\| die "BUG: tmppath empty!";
256			do {
257	dpavlin	20	if ($tmpsvn =~ s#(/[^/]+)/*$##) {
258			$SVNREP = $1 . $SVNREP;
259	dpavlin	26	} elsif ($e->{'paths'}->{'path'}->[0]->{'copyfrom-path'}) {
260			print "NOTICE: copyfrom outside synced repository ignored - skipping\n";
261			next;
262	dpavlin	8	} else {
263	dpavlin	15	print "NOTICE: can't deduce svn dir from $SVNROOT - skipping\n";
264			next;
265	dpavlin	8	}
266			} until ($tmppath =~ m/^$SVNREP/);
267
268			print "NOTICE: using $SVNREP as directory for svn\n";
269
270	dpavlin	1	printf($fmt, $e->{'revision'}, $e->{'author'}, $e->{'date'}, $e->{'msg'});
271	dpavlin	18	my @commit;
272
273	dpavlin	1	foreach my $p (@{$e->{'paths'}->{'path'}}) {
274			my ($action,$path) = ($p->{'action'},$p->{'content'});
275
276	dpavlin	23	next if ($path =~ m#/\.svnrev$#);
277
278	dpavlin	1	print "svn2cvs: $action $path\n";
279
280			# prepare path and message
281			my $file = $path;
282	dpavlin	27	if ( $path !~ s#^\Q$SVNREP\E/*## ) {
283			print "NOTICE: skipping '$path' which isn't under repository root '$SVNREP'\n";
284			die unless $partial_import;
285			next;
286			}
287	dpavlin	7
288			if (! $path) {
289			print "NOTICE: skipped this operation. Probably trunk creation\n";
290			next;
291			}
292
293	dpavlin	1	my $msg = $e->{'msg'};
294	dpavlin	14	$msg =~ s/'/'\\''/g; # quote "
295	dpavlin	1
296			if ($action =~ /M/) {
297			print "svn2cvs: modify $path -- nop\n";
298			} elsif ($action =~ /A/) {
299	dpavlin	8	if (-d $path) {
300	dpavlin	22	add_dir($path, $msg);
301	dpavlin	14	} elsif ($path =~ m,^(.+)/[^/]+$, && ! -e "$1/CVS/Root") {
302			my $dir = $1;
303	dpavlin	22	in_entries($dir) \|\| add_dir($dir, $msg);
304	dpavlin	14	in_entries($path) \|\| log_system("$cvs add $path", "cvs add of $path failed");
305	dpavlin	8	} else {
306	dpavlin	14	in_entries($path) \|\| log_system("$cvs add $path", "cvs add of $path failed");
307	dpavlin	8	}
308	dpavlin	1	} elsif ($action =~ /D/) {
309	dpavlin	22	if (-e $path) {
310			unlink $path \|\| die "can't delete $path: $!";
311			log_system("$cvs delete $path", "cvs delete of $path failed");
312			} else {
313			print "WARNING: $path is not present, skipping...\n";
314			undef $path;
315			}
316	dpavlin	1	} else {
317			print "WARNING: action $action not implemented on $path. Bug or missing feature of $0\n";
318			}
319
320	dpavlin	18	# save commits for later
321	dpavlin	22	push @commit, $path if ($path);
322	dpavlin	1
323			}
324
325	dpavlin	18	my $msg = $e->{'msg'};
326			$msg =~ s/'/'\\''/g; # quote "
327
328			# now commit changes
329			log_system("$cvs commit -m '$msg' ".join(" ",@commit), "cvs commit of ".join(",",@commit)." failed");
330
331	dpavlin	1	commit_svnrev($rev);
332			}
333	dpavlin	12
334	dpavlin	21	# cd out of $CVSREP before File::Temp::END is called
335			chdir("/tmp") \|\| die "can't cd to /tmp: $!";
336
337	dpavlin	12	__END__
338
339			=pod
340
341			=head1 NAME
342
343			svn2cvs - save subversion commits to (read-only) cvs repository
344
345			=head1 SYNOPSIS
346
347			./svn2cvs.pl SVN_URL CVSROOT CVSREPOSITORY
348
349			Usage example (used to self-host this script):
350
351			./svn2cvs.pl file:///home/dpavlin/private/svn/svn2cvs/trunk/ \
352			:pserver:dpavlin@cvs.tigris.org:/cvs svn2cvs/src
353
354			=head1 DESCRIPTION
355
356	dpavlin	18	This script will allows you to commit changes made to Subversion repository to
357			(read-only) CVS repository manually or from Subversion's C<post-commit> hook.
358	dpavlin	12
359			It's using F<.svnrev> file (which will be created on first run) in
360			B<CVSROOT/CVSREPOSITORY> to store last Subversion revision which was
361			committed into CVS.
362
363			One run will do following things:
364
365			=over 4
366
367			=item *
368			checkout B<CVSREPOSITORY> from B<CVSROOT> to temporary directory
369
370			=item *
371			check if F<.svnrev> file exists and create it if it doesn't
372
373			=item *
374			loop through all revisions from current in B<CVSROOT/CVSREPOSITORY> (using
375			F<.svnrev>) up to B<HEAD> (current one)
376
377			=over 5
378
379			=item *
380			checkout next Subversion revision from B<SVN_URL> over CVS checkout
381			temporary directory
382
383			=item *
384			make modification (add and/or delete) done in that revision
385
386			=item *
387			commit modification (added, deleted or modified files/dirs) while
388			preserving original message from CVS
389
390			=item *
391			update F<.svnrev> to match current revision
392
393			=back
394
395			=item *
396			cleanup temporary directory
397
398			=back
399
400			If checkout fails for some reason (e.g. flaky ssh connection), you will
401			still have valid CVS repository, so all you have to do is run B<svn2cvs.pl>
402			again.
403
404			=head1 WARNINGS
405
406			"Cheap" copy operations in Subversion are not at all cheap in CVS. They will
407			create multiple copies of files in CVS repository!
408
409	dpavlin	18	This script assume that you want to sync your C<trunk> (or any other
410			directory for that matter) directory with CVS, not root of your subversion.
411			This might be considered bug, but since common practise is to have
412			directories C<trunk> and C<branches> in svn and source code in them, it's
413			not serious limitation.
414
415	dpavlin	12	=head1 RELATED PROJECTS
416
417			B<Subversion> L<http://subversion.tigris.org/> version control system that is a
418			compelling replacement for CVS in the open source community.
419
420			B<cvs2svn> L<http://cvs2svn.tigris.org/> converts a CVS repository to a
421			Subversion repository. It is designed for one-time conversions, not for
422			repeated synchronizations between CVS and Subversion.
423
424	dpavlin	16	=head1 CHANGES
425
426			Versions of this utility are actually Subversion repository revisions,
427			so they might not be in sequence.
428
429			=over 3
430
431			=item r10
432
433			First release available to public
434
435			=item r15
436
437			Addition of comprehensive documentation, fixes for quoting in commit
438			messages, and support for skipping changes which are not under current
439			Subversion checkout root (e.g. branches).
440
441	dpavlin	19	=item r18
442	dpavlin	18
443			Support for importing your svn into empty CVS repository (it will first
444			create module and than dump all revisions).
445			Group commit operations to save round-trips to CVS server.
446			Documentation improvements and other small fixes.
447
448	dpavlin	20	=item r20
449	dpavlin	18
450	dpavlin	20	Fixed path deduction (overlap between Subversion reporistory and CVS checkout).
451
452	dpavlin	21	=item r21
453
454			Use C<update -d> instead of checkout after import.
455			Added fixes by Paul Egan <paulegan@mail.com> for XMLin and fixing working
456			directory.
457
458	dpavlin	22	=item r22
459	dpavlin	21
460	dpavlin	22	Rewritten import from revision 0 to empty repository, better importing
461			of deep directory structures, initial support for recovery from partial
462			commit.
463
464	dpavlin	16	=back
465
466	dpavlin	12	=head1 AUTHOR
467
468			Dobrica Pavlinusic <dpavlin@rot13.org>
469
470			L<https://www.rot13.org/~dpavlin/>
471
472			=head1 LICENSE
473
474			This product is licensed under GNU Public License (GPL) v2 or later.
475
476			=cut
477