1#!/usr/bin/env perl
2# Copyright (C) 2006, Eric Wong <normalperson@yhbt.net>
3# License: GPL v2 or later
4use warnings;
5use strict;
6use vars qw/ $AUTHOR $VERSION
7 $SVN_URL $SVN_INFO $SVN_WC
8 $GIT_SVN_INDEX $GIT_SVN
9 $GIT_DIR $REV_DIR/;
10$AUTHOR = 'Eric Wong <normalperson@yhbt.net>';
11$VERSION = '0.9.1';
12$GIT_DIR = $ENV{GIT_DIR} || "$ENV{PWD}/.git";
13$GIT_SVN = $ENV{GIT_SVN_ID} || 'git-svn';
14$GIT_SVN_INDEX = "$GIT_DIR/$GIT_SVN/index";
15$ENV{GIT_DIR} ||= $GIT_DIR;
16$SVN_URL = undef;
17$REV_DIR = "$GIT_DIR/$GIT_SVN/revs";
18$SVN_WC = "$GIT_DIR/$GIT_SVN/tree";
19# make sure the svn binary gives consistent output between locales and TZs:
21$ENV{TZ} = 'UTC';
22$ENV{LC_ALL} = 'C';
23# If SVN:: library support is added, please make the dependencies
25# optional and preserve the capability to use the command-line client.
26# use eval { require SVN::... } to make it lazy load
27use Carp qw/croak/;
28use IO::File qw//;
29use File::Basename qw/dirname basename/;
30use File::Path qw/mkpath/;
31use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
32use File::Spec qw//;
33my $sha1 = qr/[a-f\d]{40}/;
34my $sha1_short = qr/[a-f\d]{6,40}/;
35my ($_revision,$_stdin,$_no_ignore_ext,$_no_stop_copy,$_help,$_rmdir,$_edit,
36 $_find_copies_harder, $_l, $_version);
37GetOptions( 'revision|r=s' => \$_revision,
39 'no-ignore-externals' => \$_no_ignore_ext,
40 'stdin|' => \$_stdin,
41 'edit|e' => \$_edit,
42 'rmdir' => \$_rmdir,
43 'help|H|h' => \$_help,
44 'find-copies-harder' => \$_find_copies_harder,
45 'l=i' => \$_l,
46 'version|V' => \$_version,
47 'no-stop-on-copy' => \$_no_stop_copy );
48my %cmd = (
49 fetch => [ \&fetch, "Download new revisions from SVN" ],
50 init => [ \&init, "Initialize and fetch (import)"],
51 commit => [ \&commit, "Commit git revisions to SVN" ],
52 'show-ignore' => [ \&show_ignore, "Show svn:ignore listings" ],
53 rebuild => [ \&rebuild, "Rebuild git-svn metadata (after git clone)" ],
54 help => [ \&usage, "Show help" ],
55);
56my $cmd;
57for (my $i = 0; $i < @ARGV; $i++) {
58 if (defined $cmd{$ARGV[$i]}) {
59 $cmd = $ARGV[$i];
60 splice @ARGV, $i, 1;
61 last;
62 }
63};
64# we may be called as git-svn-(command), or git-svn(command).
66foreach (keys %cmd) {
67 if (/git\-svn\-?($_)(?:\.\w+)?$/) {
68 $cmd = $1;
69 last;
70 }
71}
72usage(0) if $_help;
73version() if $_version;
74usage(1) unless (defined $cmd);
75svn_check_ignore_externals();
76$cmd{$cmd}->[0]->(@ARGV);
77exit 0;
78####################### primary functions ######################
80sub usage {
81 my $exit = shift || 0;
82 my $fd = $exit ? \*STDERR : \*STDOUT;
83 print $fd <<"";
84git-svn - bidirectional operations between a single Subversion tree and git
85Usage: $0 <command> [options] [arguments]\n
86Available commands:
87 foreach (sort keys %cmd) {
89 print $fd ' ',pack('A10',$_),$cmd{$_}->[1],"\n";
90 }
91 print $fd <<"";
92\nGIT_SVN_ID may be set in the environment to an arbitrary identifier if
93you're tracking multiple SVN branches/repositories in one git repository
94and want to keep them separate.
95 exit $exit;
97}
98sub version {
100 print "git-svn version $VERSION\n";
101 exit 0;
102}
103sub rebuild {
105 $SVN_URL = shift or undef;
106 my $repo_uuid;
107 my $newest_rev = 0;
108 my $pid = open(my $rev_list,'-|');
110 defined $pid or croak $!;
111 if ($pid == 0) {
112 exec("git-rev-list","$GIT_SVN-HEAD") or croak $!;
113 }
114 my $first;
115 while (<$rev_list>) {
116 chomp;
117 my $c = $_;
118 croak "Non-SHA1: $c\n" unless $c =~ /^$sha1$/o;
119 my @commit = grep(/^git-svn-id: /,`git-cat-file commit $c`);
120 next if (!@commit); # skip merges
121 my $id = $commit[$#commit];
122 my ($url, $rev, $uuid) = ($id =~ /^git-svn-id:\s(\S+?)\@(\d+)
123 \s([a-f\d\-]+)$/x);
124 if (!$rev || !$uuid || !$url) {
125 # some of the original repositories I made had
126 # indentifiers like this:
127 ($rev, $uuid) = ($id =~/^git-svn-id:\s(\d+)
128 \@([a-f\d\-]+)/x);
129 if (!$rev || !$uuid) {
130 croak "Unable to extract revision or UUID from ",
131 "$c, $id\n";
132 }
133 }
134 print "r$rev = $c\n";
135 unless (defined $first) {
136 if (!$SVN_URL && !$url) {
137 croak "SVN repository location required: $url\n";
138 }
139 $SVN_URL ||= $url;
140 $repo_uuid = setup_git_svn();
141 $first = $rev;
142 }
143 if ($uuid ne $repo_uuid) {
144 croak "Repository UUIDs do not match!\ngot: $uuid\n",
145 "expected: $repo_uuid\n";
146 }
147 assert_revision_eq_or_unknown($rev, $c);
148 sys('git-update-ref',"$GIT_SVN/revs/$rev",$c);
149 $newest_rev = $rev if ($rev > $newest_rev);
150 }
151 close $rev_list or croak $?;
152 if (!chdir $SVN_WC) {
153 my @svn_co = ('svn','co',"-r$first");
154 push @svn_co, '--ignore-externals' unless $_no_ignore_ext;
155 sys(@svn_co, $SVN_URL, $SVN_WC);
156 chdir $SVN_WC or croak $!;
157 }
158 $pid = fork;
160 defined $pid or croak $!;
161 if ($pid == 0) {
162 my @svn_up = qw(svn up);
163 push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
164 sys(@svn_up,"-r$newest_rev");
165 $ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX;
166 git_addremove();
167 exec('git-write-tree');
168 }
169 waitpid $pid, 0;
170}
171sub init {
173 $SVN_URL = shift or croak "SVN repository location required\n";
174 unless (-d $GIT_DIR) {
175 sys('git-init-db');
176 }
177 setup_git_svn();
178}
179sub fetch {
181 my (@parents) = @_;
182 $SVN_URL ||= file_to_s("$GIT_DIR/$GIT_SVN/info/url");
183 my @log_args = -d $SVN_WC ? ($SVN_WC) : ($SVN_URL);
184 unless ($_revision) {
185 $_revision = -d $SVN_WC ? 'BASE:HEAD' : '0:HEAD';
186 }
187 push @log_args, "-r$_revision";
188 push @log_args, '--stop-on-copy' unless $_no_stop_copy;
189 my $svn_log = svn_log_raw(@log_args);
191 @$svn_log = sort { $a->{revision} <=> $b->{revision} } @$svn_log;
192 my $base = shift @$svn_log or croak "No base revision!\n";
194 my $last_commit = undef;
195 unless (-d $SVN_WC) {
196 my @svn_co = ('svn','co',"-r$base->{revision}");
197 push @svn_co,'--ignore-externals' unless $_no_ignore_ext;
198 sys(@svn_co, $SVN_URL, $SVN_WC);
199 chdir $SVN_WC or croak $!;
200 $last_commit = git_commit($base, @parents);
201 unless (-f "$GIT_DIR/refs/heads/master") {
202 sys(qw(git-update-ref refs/heads/master),$last_commit);
203 }
204 assert_svn_wc_clean($base->{revision}, $last_commit);
205 } else {
206 chdir $SVN_WC or croak $!;
207 $last_commit = file_to_s("$REV_DIR/$base->{revision}");
208 }
209 my @svn_up = qw(svn up);
210 push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
211 my $last_rev = $base->{revision};
212 foreach my $log_msg (@$svn_log) {
213 assert_svn_wc_clean($last_rev, $last_commit);
214 $last_rev = $log_msg->{revision};
215 sys(@svn_up,"-r$last_rev");
216 $last_commit = git_commit($log_msg, $last_commit, @parents);
217 }
218 assert_svn_wc_clean($last_rev, $last_commit);
219 return pop @$svn_log;
220}
221sub commit {
223 my (@commits) = @_;
224 if ($_stdin || !@commits) {
225 print "Reading from stdin...\n";
226 @commits = ();
227 while (<STDIN>) {
228 if (/\b([a-f\d]{6,40})\b/) {
229 unshift @commits, $1;
230 }
231 }
232 }
233 my @revs;
234 foreach my $c (@commits) {
235 chomp(my @tmp = safe_qx('git-rev-parse',$c));
236 if (scalar @tmp == 1) {
237 push @revs, $tmp[0];
238 } elsif (scalar @tmp > 1) {
239 push @revs, reverse (safe_qx('git-rev-list',@tmp));
240 } else {
241 die "Failed to rev-parse $c\n";
242 }
243 }
244 chomp @revs;
245 fetch();
247 chdir $SVN_WC or croak $!;
248 my $svn_current_rev = svn_info('.')->{'Last Changed Rev'};
249 foreach my $c (@revs) {
250 print "Committing $c\n";
251 my $mods = svn_checkout_tree($svn_current_rev, $c);
252 if (scalar @$mods == 0) {
253 print "Skipping, no changes detected\n";
254 next;
255 }
256 $svn_current_rev = svn_commit_tree($svn_current_rev, $c);
257 }
258 print "Done committing ",scalar @revs," revisions to SVN\n";
259}
261sub show_ignore {
263 require File::Find or die $!;
264 my $exclude_file = "$GIT_DIR/info/exclude";
265 open my $fh, '<', $exclude_file or croak $!;
266 chomp(my @excludes = (<$fh>));
267 close $fh or croak $!;
268 $SVN_URL ||= file_to_s("$GIT_DIR/$GIT_SVN/info/url");
270 chdir $SVN_WC or croak $!;
271 my %ign;
272 File::Find::find({wanted=>sub{if(lstat $_ && -d _ && -d "$_/.svn"){
273 s#^\./##;
274 @{$ign{$_}} = safe_qx(qw(svn propget svn:ignore),$_);
275 }}, no_chdir=>1},'.');
276 print "\n# /\n";
278 foreach (@{$ign{'.'}}) { print '/',$_ if /\S/ }
279 delete $ign{'.'};
280 foreach my $i (sort keys %ign) {
281 print "\n# ",$i,"\n";
282 foreach (@{$ign{$i}}) { print '/',$i,'/',$_ if /\S/ }
283 }
284}
285########################### utility functions #########################
287sub setup_git_svn {
289 defined $SVN_URL or croak "SVN repository location required\n";
290 unless (-d $GIT_DIR) {
291 croak "GIT_DIR=$GIT_DIR does not exist!\n";
292 }
293 mkpath(["$GIT_DIR/$GIT_SVN"]);
294 mkpath(["$GIT_DIR/$GIT_SVN/info"]);
295 mkpath([$REV_DIR]);
296 s_to_file($SVN_URL,"$GIT_DIR/$GIT_SVN/info/url");
297 my $uuid = svn_info($SVN_URL)->{'Repository UUID'} or
298 croak "Repository UUID unreadable\n";
299 s_to_file($uuid,"$GIT_DIR/$GIT_SVN/info/uuid");
300 open my $fd, '>>', "$GIT_DIR/$GIT_SVN/info/exclude" or croak $!;
302 print $fd '.svn',"\n";
303 close $fd or croak $!;
304 return $uuid;
305}
306sub assert_svn_wc_clean {
308 my ($svn_rev, $treeish) = @_;
309 croak "$svn_rev is not an integer!\n" unless ($svn_rev =~ /^\d+$/);
310 croak "$treeish is not a sha1!\n" unless ($treeish =~ /^$sha1$/o);
311 my $svn_info = svn_info('.');
312 if ($svn_rev != $svn_info->{'Last Changed Rev'}) {
313 croak "Expected r$svn_rev, got r",
314 $svn_info->{'Last Changed Rev'},"\n";
315 }
316 my @status = grep(!/^Performing status on external/,(`svn status`));
317 @status = grep(!/^\s*$/,@status);
318 if (scalar @status) {
319 print STDERR "Tree ($SVN_WC) is not clean:\n";
320 print STDERR $_ foreach @status;
321 croak;
322 }
323 assert_tree($treeish);
324}
325sub assert_tree {
327 my ($treeish) = @_;
328 croak "Not a sha1: $treeish\n" unless $treeish =~ /^$sha1$/o;
329 chomp(my $type = `git-cat-file -t $treeish`);
330 my $expected;
331 while ($type eq 'tag') {
332 chomp(($treeish, $type) = `git-cat-file tag $treeish`);
333 }
334 if ($type eq 'commit') {
335 $expected = (grep /^tree /,`git-cat-file commit $treeish`)[0];
336 ($expected) = ($expected =~ /^tree ($sha1)$/);
337 die "Unable to get tree from $treeish\n" unless $expected;
338 } elsif ($type eq 'tree') {
339 $expected = $treeish;
340 } else {
341 die "$treeish is a $type, expected tree, tag or commit\n";
342 }
343 my $old_index = $ENV{GIT_INDEX_FILE};
345 my $tmpindex = $GIT_SVN_INDEX.'.assert-tmp';
346 if (-e $tmpindex) {
347 unlink $tmpindex or croak $!;
348 }
349 $ENV{GIT_INDEX_FILE} = $tmpindex;
350 git_addremove();
351 chomp(my $tree = `git-write-tree`);
352 if ($old_index) {
353 $ENV{GIT_INDEX_FILE} = $old_index;
354 } else {
355 delete $ENV{GIT_INDEX_FILE};
356 }
357 if ($tree ne $expected) {
358 croak "Tree mismatch, Got: $tree, Expected: $expected\n";
359 }
360}
361sub parse_diff_tree {
363 my $diff_fh = shift;
364 local $/ = "\0";
365 my $state = 'meta';
366 my @mods;
367 while (<$diff_fh>) {
368 chomp $_; # this gets rid of the trailing "\0"
369 if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s
370 $sha1\s($sha1)\s([MTCRAD])\d*$/xo) {
371 push @mods, { mode_a => $1, mode_b => $2,
372 sha1_b => $3, chg => $4 };
373 if ($4 =~ /^(?:C|R)$/) {
374 $state = 'file_a';
375 } else {
376 $state = 'file_b';
377 }
378 } elsif ($state eq 'file_a') {
379 my $x = $mods[$#mods] or croak "Empty array\n";
380 if ($x->{chg} !~ /^(?:C|R)$/) {
381 croak "Error parsing $_, $x->{chg}\n";
382 }
383 $x->{file_a} = $_;
384 $state = 'file_b';
385 } elsif ($state eq 'file_b') {
386 my $x = $mods[$#mods] or croak "Empty array\n";
387 if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) {
388 croak "Error parsing $_, $x->{chg}\n";
389 }
390 if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) {
391 croak "Error parsing $_, $x->{chg}\n";
392 }
393 $x->{file_b} = $_;
394 $state = 'meta';
395 } else {
396 croak "Error parsing $_\n";
397 }
398 }
399 close $diff_fh or croak $!;
400 return \@mods;
402}
403sub svn_check_prop_executable {
405 my $m = shift;
406 return if -l $m->{file_b};
407 if ($m->{mode_b} =~ /755$/) {
408 chmod((0755 &~ umask),$m->{file_b}) or croak $!;
409 if ($m->{mode_a} !~ /755$/) {
410 sys(qw(svn propset svn:executable 1), $m->{file_b});
411 }
412 -x $m->{file_b} or croak "$m->{file_b} is not executable!\n";
413 } elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) {
414 sys(qw(svn propdel svn:executable), $m->{file_b});
415 chmod((0644 &~ umask),$m->{file_b}) or croak $!;
416 -x $m->{file_b} and croak "$m->{file_b} is executable!\n";
417 }
418}
419sub svn_ensure_parent_path {
421 my $dir_b = dirname(shift);
422 svn_ensure_parent_path($dir_b) if ($dir_b ne File::Spec->curdir);
423 mkpath([$dir_b]) unless (-d $dir_b);
424 sys(qw(svn add -N), $dir_b) unless (-d "$dir_b/.svn");
425}
426sub precommit_check {
428 my $mods = shift;
429 my (%rm_file, %rmdir_check, %added_check);
430 my %o = ( D => 0, R => 1, C => 2, A => 3, M => 3, T => 3 );
432 foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) {
433 if ($m->{chg} eq 'R') {
434 if (-d $m->{file_b}) {
435 err_dir_to_file("$m->{file_a} => $m->{file_b}");
436 }
437 # dir/$file => dir/file/$file
438 my $dirname = dirname($m->{file_b});
439 while ($dirname ne File::Spec->curdir) {
440 if ($dirname ne $m->{file_a}) {
441 $dirname = dirname($dirname);
442 next;
443 }
444 err_file_to_dir("$m->{file_a} => $m->{file_b}");
445 }
446 # baz/zzz => baz (baz is a file)
447 $dirname = dirname($m->{file_a});
448 while ($dirname ne File::Spec->curdir) {
449 if ($dirname ne $m->{file_b}) {
450 $dirname = dirname($dirname);
451 next;
452 }
453 err_dir_to_file("$m->{file_a} => $m->{file_b}");
454 }
455 }
456 if ($m->{chg} =~ /^(D|R)$/) {
457 my $t = $1 eq 'D' ? 'file_b' : 'file_a';
458 $rm_file{ $m->{$t} } = 1;
459 my $dirname = dirname( $m->{$t} );
460 my $basename = basename( $m->{$t} );
461 $rmdir_check{$dirname}->{$basename} = 1;
462 } elsif ($m->{chg} =~ /^(?:A|C)$/) {
463 if (-d $m->{file_b}) {
464 err_dir_to_file($m->{file_b});
465 }
466 my $dirname = dirname( $m->{file_b} );
467 my $basename = basename( $m->{file_b} );
468 $added_check{$dirname}->{$basename} = 1;
469 while ($dirname ne File::Spec->curdir) {
470 if ($rm_file{$dirname}) {
471 err_file_to_dir($m->{file_b});
472 }
473 $dirname = dirname $dirname;
474 }
475 }
476 }
477 return (\%rmdir_check, \%added_check);
478 sub err_dir_to_file {
480 my $file = shift;
481 print STDERR "Node change from directory to file ",
482 "is not supported by Subversion: ",$file,"\n";
483 exit 1;
484 }
485 sub err_file_to_dir {
486 my $file = shift;
487 print STDERR "Node change from file to directory ",
488 "is not supported by Subversion: ",$file,"\n";
489 exit 1;
490 }
491}
492sub svn_checkout_tree {
494 my ($svn_rev, $treeish) = @_;
495 my $from = file_to_s("$REV_DIR/$svn_rev");
496 assert_svn_wc_clean($svn_rev,$from);
497 print "diff-tree '$from' '$treeish'\n";
498 my $pid = open my $diff_fh, '-|';
499 defined $pid or croak $!;
500 if ($pid == 0) {
501 my @diff_tree = qw(git-diff-tree -z -r -C);
502 push @diff_tree, '--find-copies-harder' if $_find_copies_harder;
503 push @diff_tree, "-l$_l" if defined $_l;
504 exec(@diff_tree, $from, $treeish) or croak $!;
505 }
506 my $mods = parse_diff_tree($diff_fh);
507 unless (@$mods) {
508 # git can do empty commits, SVN doesn't allow it...
509 return $mods;
510 }
511 my ($rm, $add) = precommit_check($mods);
512 my %o = ( D => 1, R => 0, C => -1, A => 3, M => 3, T => 3 );
514 foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) {
515 if ($m->{chg} eq 'C') {
516 svn_ensure_parent_path( $m->{file_b} );
517 sys(qw(svn cp), $m->{file_a}, $m->{file_b});
518 apply_mod_line_blob($m);
519 svn_check_prop_executable($m);
520 } elsif ($m->{chg} eq 'D') {
521 sys(qw(svn rm --force), $m->{file_b});
522 } elsif ($m->{chg} eq 'R') {
523 svn_ensure_parent_path( $m->{file_b} );
524 sys(qw(svn mv --force), $m->{file_a}, $m->{file_b});
525 apply_mod_line_blob($m);
526 svn_check_prop_executable($m);
527 } elsif ($m->{chg} eq 'M') {
528 apply_mod_line_blob($m);
529 svn_check_prop_executable($m);
530 } elsif ($m->{chg} eq 'T') {
531 sys(qw(svn rm --force),$m->{file_b});
532 apply_mod_line_blob($m);
533 sys(qw(svn add --force), $m->{file_b});
534 svn_check_prop_executable($m);
535 } elsif ($m->{chg} eq 'A') {
536 svn_ensure_parent_path( $m->{file_b} );
537 apply_mod_line_blob($m);
538 sys(qw(svn add --force), $m->{file_b});
539 svn_check_prop_executable($m);
540 } else {
541 croak "Invalid chg: $m->{chg}\n";
542 }
543 }
544 assert_tree($treeish);
546 if ($_rmdir) { # remove empty directories
547 handle_rmdir($rm, $add);
548 }
549 assert_tree($treeish);
550 return $mods;
551}
552# svn ls doesn't work with respect to the current working tree, but what's
554# in the repository. There's not even an option for it... *sigh*
555# (added files don't show up and removed files remain in the ls listing)
556sub svn_ls_current {
557 my ($dir, $rm, $add) = @_;
558 chomp(my @ls = safe_qx('svn','ls',$dir));
559 my @ret = ();
560 foreach (@ls) {
561 s#/$##; # trailing slashes are evil
562 push @ret, $_ unless $rm->{$dir}->{$_};
563 }
564 if (exists $add->{$dir}) {
565 push @ret, keys %{$add->{$dir}};
566 }
567 return \@ret;
568}
569sub handle_rmdir {
571 my ($rm, $add) = @_;
572 foreach my $dir (sort {length $b <=> length $a} keys %$rm) {
574 my $ls = svn_ls_current($dir, $rm, $add);
575 next if (scalar @$ls);
576 sys(qw(svn rm --force),$dir);
577 my $dn = dirname $dir;
579 $rm->{ $dn }->{ basename $dir } = 1;
580 $ls = svn_ls_current($dn, $rm, $add);
581 while (scalar @$ls == 0 && $dn ne File::Spec->curdir) {
582 sys(qw(svn rm --force),$dn);
583 $dir = basename $dn;
584 $dn = dirname $dn;
585 $rm->{ $dn }->{ $dir } = 1;
586 $ls = svn_ls_current($dn, $rm, $add);
587 }
588 }
589}
590sub svn_commit_tree {
592 my ($svn_rev, $commit) = @_;
593 my $commit_msg = "$GIT_DIR/$GIT_SVN/.svn-commit.tmp.$$";
594 open my $msg, '>', $commit_msg or croak $!;
595 chomp(my $type = `git-cat-file -t $commit`);
597 if ($type eq 'commit') {
598 my $pid = open my $msg_fh, '-|';
599 defined $pid or croak $!;
600 if ($pid == 0) {
602 exec(qw(git-cat-file commit), $commit) or croak $!;
603 }
604 my $in_msg = 0;
605 while (<$msg_fh>) {
606 if (!$in_msg) {
607 $in_msg = 1 if (/^\s*$/);
608 } else {
609 print $msg $_ or croak $!;
610 }
611 }
612 close $msg_fh or croak $!;
613 }
614 close $msg or croak $!;
615 if ($_edit || ($type eq 'tree')) {
617 my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi';
618 system($editor, $commit_msg);
619 }
620 my @ci_output = safe_qx(qw(svn commit -F),$commit_msg);
621 my ($committed) = grep(/^Committed revision \d+\./,@ci_output);
622 unlink $commit_msg;
623 defined $committed or croak
624 "Commit output failed to parse committed revision!\n",
625 join("\n",@ci_output),"\n";
626 my ($rev_committed) = ($committed =~ /^Committed revision (\d+)\./);
627 # resync immediately
629 my @svn_up = (qw(svn up), "-r$svn_rev");
630 push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
631 sys(@svn_up);
632 return fetch("$rev_committed=$commit")->{revision};
633}
634sub svn_log_raw {
636 my (@log_args) = @_;
637 my $pid = open my $log_fh,'-|';
638 defined $pid or croak $!;
639 if ($pid == 0) {
641 exec (qw(svn log), @log_args) or croak $!
642 }
643 my @svn_log;
645 my $state = 'sep';
646 while (<$log_fh>) {
647 chomp;
648 if (/^\-{72}$/) {
649 if ($state eq 'msg') {
650 if ($svn_log[$#svn_log]->{lines}) {
651 $svn_log[$#svn_log]->{msg} .= $_."\n";
652 unless(--$svn_log[$#svn_log]->{lines}) {
653 $state = 'sep';
654 }
655 } else {
656 croak "Log parse error at: $_\n",
657 $svn_log[$#svn_log]->{revision},
658 "\n";
659 }
660 next;
661 }
662 if ($state ne 'sep') {
663 croak "Log parse error at: $_\n",
664 "state: $state\n",
665 $svn_log[$#svn_log]->{revision},
666 "\n";
667 }
668 $state = 'rev';
669 # if we have an empty log message, put something there:
671 if (@svn_log) {
672 $svn_log[$#svn_log]->{msg} ||= "\n";
673 delete $svn_log[$#svn_log]->{lines};
674 }
675 next;
676 }
677 if ($state eq 'rev' && s/^r(\d+)\s*\|\s*//) {
678 my $rev = $1;
679 my ($author, $date, $lines) = split(/\s*\|\s*/, $_, 3);
680 ($lines) = ($lines =~ /(\d+)/);
681 my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~
682 /(\d{4})\-(\d\d)\-(\d\d)\s
683 (\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x)
684 or croak "Failed to parse date: $date\n";
685 my %log_msg = ( revision => $rev,
686 date => "$tz $Y-$m-$d $H:$M:$S",
687 author => $author,
688 lines => $lines,
689 msg => '' );
690 push @svn_log, \%log_msg;
691 $state = 'msg_start';
692 next;
693 }
694 # skip the first blank line of the message:
695 if ($state eq 'msg_start' && /^$/) {
696 $state = 'msg';
697 } elsif ($state eq 'msg') {
698 if ($svn_log[$#svn_log]->{lines}) {
699 $svn_log[$#svn_log]->{msg} .= $_."\n";
700 unless (--$svn_log[$#svn_log]->{lines}) {
701 $state = 'sep';
702 }
703 } else {
704 croak "Log parse error at: $_\n",
705 $svn_log[$#svn_log]->{revision},"\n";
706 }
707 }
708 }
709 close $log_fh or croak $?;
710 return \@svn_log;
711}
712sub svn_info {
714 my $url = shift || $SVN_URL;
715 my $pid = open my $info_fh, '-|';
717 defined $pid or croak $!;
718 if ($pid == 0) {
720 exec(qw(svn info),$url) or croak $!;
721 }
722 my $ret = {};
724 # only single-lines seem to exist in svn info output
725 while (<$info_fh>) {
726 chomp $_;
727 if (m#^([^:]+)\s*:\s*(\S*)$#) {
728 $ret->{$1} = $2;
729 push @{$ret->{-order}}, $1;
730 }
731 }
732 close $info_fh or croak $!;
733 return $ret;
734}
735sub sys { system(@_) == 0 or croak $? }
737sub git_addremove {
739 system( "git-diff-files --name-only -z ".
740 " | git-update-index --remove -z --stdin && ".
741 "git-ls-files -z --others ".
742 "'--exclude-from=$GIT_DIR/$GIT_SVN/info/exclude'".
743 " | git-update-index --add -z --stdin"
744 ) == 0 or croak $?
745}
746sub s_to_file {
748 my ($str, $file, $mode) = @_;
749 open my $fd,'>',$file or croak $!;
750 print $fd $str,"\n" or croak $!;
751 close $fd or croak $!;
752 chmod ($mode &~ umask, $file) if (defined $mode);
753}
754sub file_to_s {
756 my $file = shift;
757 open my $fd,'<',$file or croak "$!: file: $file\n";
758 local $/;
759 my $ret = <$fd>;
760 close $fd or croak $!;
761 $ret =~ s/\s*$//s;
762 return $ret;
763}
764sub assert_revision_unknown {
766 my $revno = shift;
767 if (-f "$REV_DIR/$revno") {
768 croak "$REV_DIR/$revno already exists! ",
769 "Why are we refetching it?";
770 }
771}
772sub assert_revision_eq_or_unknown {
774 my ($revno, $commit) = @_;
775 if (-f "$REV_DIR/$revno") {
776 my $current = file_to_s("$REV_DIR/$revno");
777 if ($commit ne $current) {
778 croak "$REV_DIR/$revno already exists!\n",
779 "current: $current\nexpected: $commit\n";
780 }
781 return;
782 }
783}
784sub git_commit {
786 my ($log_msg, @parents) = @_;
787 assert_revision_unknown($log_msg->{revision});
788 my $out_fh = IO::File->new_tmpfile or croak $!;
789 my $info = svn_info('.');
790 my $uuid = $info->{'Repository UUID'};
791 defined $uuid or croak "Unable to get Repository UUID\n";
792 # commit parents can be conditionally bound to a particular
794 # svn revision via: "svn_revno=commit_sha1", filter them out here:
795 my @exec_parents;
796 foreach my $p (@parents) {
797 next unless defined $p;
798 if ($p =~ /^(\d+)=($sha1_short)$/o) {
799 if ($1 == $log_msg->{revision}) {
800 push @exec_parents, $2;
801 }
802 } else {
803 push @exec_parents, $p if $p =~ /$sha1_short/o;
804 }
805 }
806 my $pid = fork;
808 defined $pid or croak $!;
809 if ($pid == 0) {
810 $ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX;
811 git_addremove();
812 chomp(my $tree = `git-write-tree`);
813 croak if $?;
814 my $msg_fh = IO::File->new_tmpfile or croak $!;
815 print $msg_fh $log_msg->{msg}, "\ngit-svn-id: ",
816 "$SVN_URL\@$log_msg->{revision}",
817 " $uuid\n" or croak $!;
818 $msg_fh->flush == 0 or croak $!;
819 seek $msg_fh, 0, 0 or croak $!;
820 $ENV{GIT_AUTHOR_NAME} = $ENV{GIT_COMMITTER_NAME} =
822 $log_msg->{author};
823 $ENV{GIT_AUTHOR_EMAIL} = $ENV{GIT_COMMITTER_EMAIL} =
824 $log_msg->{author}."\@$uuid";
825 $ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} =
826 $log_msg->{date};
827 my @exec = ('git-commit-tree',$tree);
828 push @exec, '-p', $_ foreach @exec_parents;
829 open STDIN, '<&', $msg_fh or croak $!;
830 open STDOUT, '>&', $out_fh or croak $!;
831 exec @exec or croak $!;
832 }
833 waitpid($pid,0);
834 croak if $?;
835 $out_fh->flush == 0 or croak $!;
837 seek $out_fh, 0, 0 or croak $!;
838 chomp(my $commit = do { local $/; <$out_fh> });
839 if ($commit !~ /^$sha1$/o) {
840 croak "Failed to commit, invalid sha1: $commit\n";
841 }
842 my @update_ref = ('git-update-ref',"refs/heads/$GIT_SVN-HEAD",$commit);
843 if (my $primary_parent = shift @exec_parents) {
844 push @update_ref, $primary_parent;
845 }
846 sys(@update_ref);
847 sys('git-update-ref',"$GIT_SVN/revs/$log_msg->{revision}",$commit);
848 print "r$log_msg->{revision} = $commit\n";
849 return $commit;
850}
851sub apply_mod_line_blob {
853 my $m = shift;
854 if ($m->{mode_b} =~ /^120/) {
855 blob_to_symlink($m->{sha1_b}, $m->{file_b});
856 } else {
857 blob_to_file($m->{sha1_b}, $m->{file_b});
858 }
859}
860sub blob_to_symlink {
862 my ($blob, $link) = @_;
863 defined $link or croak "\$link not defined!\n";
864 croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o;
865 if (-l $link || -f _) {
866 unlink $link or croak $!;
867 }
868 my $dest = `git-cat-file blob $blob`; # no newline, so no chomp
870 symlink $dest, $link or croak $!;
871}
872sub blob_to_file {
874 my ($blob, $file) = @_;
875 defined $file or croak "\$file not defined!\n";
876 croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o;
877 if (-l $file || -f _) {
878 unlink $file or croak $!;
879 }
880 open my $blob_fh, '>', $file or croak "$!: $file\n";
882 my $pid = fork;
883 defined $pid or croak $!;
884 if ($pid == 0) {
886 open STDOUT, '>&', $blob_fh or croak $!;
887 exec('git-cat-file','blob',$blob);
888 }
889 waitpid $pid, 0;
890 croak $? if $?;
891 close $blob_fh or croak $!;
893}
894sub safe_qx {
896 my $pid = open my $child, '-|';
897 defined $pid or croak $!;
898 if ($pid == 0) {
899 exec(@_) or croak $?;
900 }
901 my @ret = (<$child>);
902 close $child or croak $?;
903 die $? if $?; # just in case close didn't error out
904 return wantarray ? @ret : join('',@ret);
905}
906sub svn_check_ignore_externals {
908 return if $_no_ignore_ext;
909 unless (grep /ignore-externals/,(safe_qx(qw(svn co -h)))) {
910 print STDERR "W: Installed svn version does not support ",
911 "--ignore-externals\n";
912 $_no_ignore_ext = 1;
913 }
914}
915__END__
916Data structures:
918@svn_log = array of log_msg hashes
920$log_msg hash
922{
923 msg => 'whitespace-formatted log entry
924', # trailing newline is preserved
925 revision => '8', # integer
926 date => '2004-02-24T17:01:44.108345Z', # commit date
927 author => 'committer name'
928};
929@mods = array of diff-index line hashes, each element represents one line
932 of diff-index output
933diff-index line ($m hash)
935{
936 mode_a => first column of diff-index output, no leading ':',
937 mode_b => second column of diff-index output,
938 sha1_b => sha1sum of the final blob,
939 chg => change type [MCRAD],
940 file_a => original file name of a file (iff chg is 'C' or 'R')
941 file_b => new/current file name of a file (any chg)
942}
943;