| 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 |
# |
| 12 |
# documentation is after __END__ |
| 13 |
|
| 14 |
use strict; |
| 15 |
use File::Temp qw/ tempdir /; |
| 16 |
use Data::Dumper; |
| 17 |
use XML::Simple; |
| 18 |
|
| 19 |
if (@ARGV < 2) { |
| 20 |
print "usage: $0 SVN_URL CVSROOT CVSREPOSITORY\n"; |
| 21 |
exit 1; |
| 22 |
} |
| 23 |
|
| 24 |
my ($SVNROOT,$CVSROOT, $CVSREP) = @ARGV; |
| 25 |
|
| 26 |
if ($SVNROOT !~ m,^[\w+]+:///*\w+,) { |
| 27 |
print "ERROR: invalid svn root $SVNROOT\n"; |
| 28 |
exit 1; |
| 29 |
} |
| 30 |
|
| 31 |
my $TMPDIR=tempdir( "/tmp/checkoutXXXXX", CLEANUP => 1 ); |
| 32 |
|
| 33 |
chdir($TMPDIR) || die "can't cd to $TMPDIR: $!"; |
| 34 |
|
| 35 |
# cvs command with root |
| 36 |
my $cvs="cvs -d $CVSROOT"; |
| 37 |
|
| 38 |
# |
| 39 |
# sub to do logging and system calls |
| 40 |
# |
| 41 |
sub log_system($$) { |
| 42 |
my ($cmd,$errmsg) = @_; |
| 43 |
print STDERR "## $cmd\n"; |
| 44 |
system($cmd) == 0 || die "$errmsg: $!"; |
| 45 |
} |
| 46 |
|
| 47 |
# |
| 48 |
# sub to commit .svn rev file later |
| 49 |
# |
| 50 |
sub commit_svnrev { |
| 51 |
my $rev = shift @_; |
| 52 |
my $add_new = shift @_; |
| 53 |
|
| 54 |
die "commit_svnrev needs revision" if (! defined($rev)); |
| 55 |
|
| 56 |
open(SVNREV,"> .svnrev") || die "can't open $TMPDIR/$CVSREP/.svnrev: $!"; |
| 57 |
print SVNREV $rev; |
| 58 |
close(SVNREV); |
| 59 |
|
| 60 |
my $path=".svnrev"; |
| 61 |
|
| 62 |
if ($add_new) { |
| 63 |
system "$cvs add $path" || die "cvs add of $path failed: $!"; |
| 64 |
} else { |
| 65 |
my $msg="subversion revision $rev commited to CVS"; |
| 66 |
print "$msg\n"; |
| 67 |
system "$cvs commit -m '$msg' $path" || die "cvs commit of $path failed: $!"; |
| 68 |
} |
| 69 |
} |
| 70 |
|
| 71 |
# ok, now do the checkout |
| 72 |
|
| 73 |
log_system("$cvs -q checkout $CVSREP", "cvs checkout failed"); |
| 74 |
|
| 75 |
chdir($CVSREP) || die "can't cd to $TMPDIR/$CVSREP: $!"; |
| 76 |
|
| 77 |
|
| 78 |
my $rev; |
| 79 |
|
| 80 |
# check if svnrev exists |
| 81 |
if (! -e ".svnrev") { |
| 82 |
print <<_USAGE_; |
| 83 |
|
| 84 |
Your CVS repository doesn't have .svnrev file! |
| 85 |
|
| 86 |
This file is used to keep CVS repository and Subversion in sync, so |
| 87 |
that only newer changes will be commited. |
| 88 |
|
| 89 |
It's quote possible that this is first svn2cvs run for this repository. |
| 90 |
If so, you will have to identify correct svn revision which |
| 91 |
corresponds to current version of CVS repository that has just |
| 92 |
been checkouted. |
| 93 |
|
| 94 |
If you migrated your cvs repository to svn using cvs2svn, this will be |
| 95 |
last Subversion revision. If this is initial run of conversion of |
| 96 |
Subversion repository to CVS, correct revision is 0. |
| 97 |
|
| 98 |
_USAGE_ |
| 99 |
|
| 100 |
print "svn revision corresponding to CVS [abort]: "; |
| 101 |
my $in = <STDIN>; |
| 102 |
chomp($in); |
| 103 |
if ($in !~ /^\d+$/) { |
| 104 |
print "Aborting: revision not a number\n"; |
| 105 |
exit 1; |
| 106 |
} else { |
| 107 |
$rev = $in; |
| 108 |
commit_svnrev($rev,1); # create new |
| 109 |
} |
| 110 |
} else { |
| 111 |
open(SVNREV,".svnrev") || die "can't open $TMPDIR/$CVSREP/.svnrev: $!"; |
| 112 |
$rev = <SVNREV>; |
| 113 |
chomp($rev); |
| 114 |
close(SVNREV); |
| 115 |
} |
| 116 |
|
| 117 |
print "Starting after revision $rev\n"; |
| 118 |
$rev++; |
| 119 |
|
| 120 |
|
| 121 |
# |
| 122 |
# FIXME!! HEAD should really be next verison and loop because this way we |
| 123 |
# loose multiple edits of same file and corresponding messages. On the |
| 124 |
# other hand, if you want to compress your traffic to CVS server and don't |
| 125 |
# case much about accuracy and completnes of logs there, this might |
| 126 |
# be good. YMMV |
| 127 |
# |
| 128 |
open(LOG, "svn log -r $rev:HEAD -v --xml $SVNROOT |") || die "svn log for repository $SVNROOT failed: $!"; |
| 129 |
my $log; |
| 130 |
while(<LOG>) { |
| 131 |
$log .= $_; |
| 132 |
} |
| 133 |
close(LOG); |
| 134 |
|
| 135 |
my $xml = XMLin($log, ForceArray => [ 'logentry', 'path' ]); |
| 136 |
|
| 137 |
|
| 138 |
#=begin log_example |
| 139 |
# |
| 140 |
#------------------------------------------------------------------------ |
| 141 |
#r256 | dpavlin | 2004-03-09 13:18:17 +0100 (Tue, 09 Mar 2004) | 2 lines |
| 142 |
# |
| 143 |
#ported r254 from hidra branch |
| 144 |
# |
| 145 |
#=cut |
| 146 |
|
| 147 |
my $fmt = "\n" . "-" x 79 . "\nr%5s| %8s | %s\n\n%s\n"; |
| 148 |
|
| 149 |
if (! $xml->{'logentry'}) { |
| 150 |
print "no newer log entries in Subversion repostory. CVS is current\n"; |
| 151 |
exit 0; |
| 152 |
} |
| 153 |
|
| 154 |
foreach my $e (@{$xml->{'logentry'}}) { |
| 155 |
die "BUG: revision from .svnrev ($rev) greater than from subversion (".$e->{'revision'}.")" if ($rev > $e->{'revision'}); |
| 156 |
$rev = $e->{'revision'}; |
| 157 |
log_system("svn export --force -q -r $rev $SVNROOT $TMPDIR/$CVSREP", "svn export of revision $rev failed"); |
| 158 |
|
| 159 |
# deduce name of svn directory |
| 160 |
my $SVNREP = ""; |
| 161 |
my $tmpsvn = $SVNROOT || die "BUG: SVNROOT empty!"; |
| 162 |
my $tmppath = $e->{'paths'}->{'path'}->[0]->{'content'} || die "BUG: tmppath empty!"; |
| 163 |
do { |
| 164 |
print "## tmppath: $tmppath tmpsvn: $tmpsvn SVNREP: $SVNREP\n"; |
| 165 |
if ($tmpsvn =~ s,(/\w+/*)$,,) { |
| 166 |
$SVNREP .= $1; |
| 167 |
} else { |
| 168 |
die "ERROR: can't deduce svn dir from $SVNROOT.\nUsing root of snv repository for current version instead of /trunk/ is not supported.\n"; |
| 169 |
} |
| 170 |
} until ($tmppath =~ m/^$SVNREP/); |
| 171 |
|
| 172 |
print "NOTICE: using $SVNREP as directory for svn\n"; |
| 173 |
|
| 174 |
printf($fmt, $e->{'revision'}, $e->{'author'}, $e->{'date'}, $e->{'msg'}); |
| 175 |
foreach my $p (@{$e->{'paths'}->{'path'}}) { |
| 176 |
my ($action,$path) = ($p->{'action'},$p->{'content'}); |
| 177 |
|
| 178 |
print "svn2cvs: $action $path\n"; |
| 179 |
|
| 180 |
# prepare path and message |
| 181 |
my $file = $path; |
| 182 |
$path =~ s,^$SVNREP/*,, || die "BUG: can't strip SVNREP from path"; |
| 183 |
|
| 184 |
if (! $path) { |
| 185 |
print "NOTICE: skipped this operation. Probably trunk creation\n"; |
| 186 |
next; |
| 187 |
} |
| 188 |
|
| 189 |
my $msg = $e->{'msg'}; |
| 190 |
$msg =~ s/'/\\'/g; # quote " |
| 191 |
|
| 192 |
if ($action =~ /M/) { |
| 193 |
print "svn2cvs: modify $path -- nop\n"; |
| 194 |
} elsif ($action =~ /A/) { |
| 195 |
if (-d $path) { |
| 196 |
chdir($path) || die "can't cd into dir $path for import: $!"; |
| 197 |
log_system("$cvs import -d -m '$msg' $CVSREP/$path svn r$rev", "cvs import of $path failed"); |
| 198 |
chdir("$TMPDIR") || die "can't cd to $TMPDIR/$CVSREP: $!"; |
| 199 |
log_system("$cvs checkout $CVSREP/$path", "cvs checkout of imported dir $path failed"); |
| 200 |
chdir("$TMPDIR/$CVSREP") || die "can't cd back to $TMPDIR/$CVSREP: $!"; |
| 201 |
} else { |
| 202 |
log_system("$cvs add -m '$msg' $path", "cvs add of $path failed"); |
| 203 |
} |
| 204 |
} elsif ($action =~ /D/) { |
| 205 |
log_system("$cvs delete -m '$msg' $path", "cvs delete of $path failed"); |
| 206 |
} else { |
| 207 |
print "WARNING: action $action not implemented on $path. Bug or missing feature of $0\n"; |
| 208 |
} |
| 209 |
|
| 210 |
# now commit changes |
| 211 |
log_system("$cvs commit -m '$msg' $path", "cvs commit of $path failed"); |
| 212 |
|
| 213 |
} |
| 214 |
|
| 215 |
commit_svnrev($rev); |
| 216 |
} |
| 217 |
|
| 218 |
__END__ |
| 219 |
|
| 220 |
=pod |
| 221 |
|
| 222 |
=head1 NAME |
| 223 |
|
| 224 |
svn2cvs - save subversion commits to (read-only) cvs repository |
| 225 |
|
| 226 |
=head1 SYNOPSIS |
| 227 |
|
| 228 |
./svn2cvs.pl SVN_URL CVSROOT CVSREPOSITORY |
| 229 |
|
| 230 |
Usage example (used to self-host this script): |
| 231 |
|
| 232 |
./svn2cvs.pl file:///home/dpavlin/private/svn/svn2cvs/trunk/ \ |
| 233 |
:pserver:dpavlin@cvs.tigris.org:/cvs svn2cvs/src |
| 234 |
|
| 235 |
=head1 DESCRIPTION |
| 236 |
|
| 237 |
This script will allow you to commit changes made to Subversion repository also to (read-only) CVS repository manually or from Subversion's C<post-commit> hook. |
| 238 |
|
| 239 |
It's using F<.svnrev> file (which will be created on first run) in |
| 240 |
B<CVSROOT/CVSREPOSITORY> to store last Subversion revision which was |
| 241 |
committed into CVS. |
| 242 |
|
| 243 |
One run will do following things: |
| 244 |
|
| 245 |
=over 4 |
| 246 |
|
| 247 |
=item * |
| 248 |
checkout B<CVSREPOSITORY> from B<CVSROOT> to temporary directory |
| 249 |
|
| 250 |
=item * |
| 251 |
check if F<.svnrev> file exists and create it if it doesn't |
| 252 |
|
| 253 |
=item * |
| 254 |
loop through all revisions from current in B<CVSROOT/CVSREPOSITORY> (using |
| 255 |
F<.svnrev>) up to B<HEAD> (current one) |
| 256 |
|
| 257 |
=over 5 |
| 258 |
|
| 259 |
=item * |
| 260 |
checkout next Subversion revision from B<SVN_URL> over CVS checkout |
| 261 |
temporary directory |
| 262 |
|
| 263 |
=item * |
| 264 |
make modification (add and/or delete) done in that revision |
| 265 |
|
| 266 |
=item * |
| 267 |
commit modification (added, deleted or modified files/dirs) while |
| 268 |
preserving original message from CVS |
| 269 |
|
| 270 |
=item * |
| 271 |
update F<.svnrev> to match current revision |
| 272 |
|
| 273 |
=back |
| 274 |
|
| 275 |
=item * |
| 276 |
cleanup temporary directory |
| 277 |
|
| 278 |
=back |
| 279 |
|
| 280 |
If checkout fails for some reason (e.g. flaky ssh connection), you will |
| 281 |
still have valid CVS repository, so all you have to do is run B<svn2cvs.pl> |
| 282 |
again. |
| 283 |
|
| 284 |
=head1 WARNINGS |
| 285 |
|
| 286 |
"Cheap" copy operations in Subversion are not at all cheap in CVS. They will |
| 287 |
create multiple copies of files in CVS repository! |
| 288 |
|
| 289 |
=head1 RELATED PROJECTS |
| 290 |
|
| 291 |
B<Subversion> L<http://subversion.tigris.org/> version control system that is a |
| 292 |
compelling replacement for CVS in the open source community. |
| 293 |
|
| 294 |
B<cvs2svn> L<http://cvs2svn.tigris.org/> converts a CVS repository to a |
| 295 |
Subversion repository. It is designed for one-time conversions, not for |
| 296 |
repeated synchronizations between CVS and Subversion. |
| 297 |
|
| 298 |
=head1 AUTHOR |
| 299 |
|
| 300 |
Dobrica Pavlinusic <dpavlin@rot13.org> |
| 301 |
|
| 302 |
L<https://www.rot13.org/~dpavlin/> |
| 303 |
|
| 304 |
=head1 LICENSE |
| 305 |
|
| 306 |
This product is licensed under GNU Public License (GPL) v2 or later. |
| 307 |
|
| 308 |
=cut |
| 309 |
|
Parent Directory
| 
Revision Log