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$VERSION = '0.10.0';
12$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//;
33use POSIX qw/strftime/;
34my $sha1 = qr/[a-f\d]{40}/;
35my $sha1_short = qr/[a-f\d]{6,40}/;
36my ($_revision,$_stdin,$_no_ignore_ext,$_no_stop_copy,$_help,$_rmdir,$_edit,
37 $_find_copies_harder, $_l, $_version);
38GetOptions( 'revision|r=s' => \$_revision,
40 'no-ignore-externals' => \$_no_ignore_ext,
41 'stdin|' => \$_stdin,
42 'edit|e' => \$_edit,
43 'rmdir' => \$_rmdir,
44 'help|H|h' => \$_help,
45 'find-copies-harder' => \$_find_copies_harder,
46 'l=i' => \$_l,
47 'version|V' => \$_version,
48 'no-stop-on-copy' => \$_no_stop_copy );
49my %cmd = (
50 fetch => [ \&fetch, "Download new revisions from SVN" ],
51 init => [ \&init, "Initialize and fetch (import)"],
52 commit => [ \&commit, "Commit git revisions to SVN" ],
53 'show-ignore' => [ \&show_ignore, "Show svn:ignore listings" ],
54 rebuild => [ \&rebuild, "Rebuild git-svn metadata (after git clone)" ],
55 help => [ \&usage, "Show help" ],
56);
57my $cmd;
58for (my $i = 0; $i < @ARGV; $i++) {
59 if (defined $cmd{$ARGV[$i]}) {
60 $cmd = $ARGV[$i];
61 splice @ARGV, $i, 1;
62 last;
63 }
64};
65# we may be called as git-svn-(command), or git-svn(command).
67foreach (keys %cmd) {
68 if (/git\-svn\-?($_)(?:\.\w+)?$/) {
69 $cmd = $1;
70 last;
71 }
72}
73usage(0) if $_help;
74version() if $_version;
75usage(1) unless (defined $cmd);
76svn_check_ignore_externals();
77$cmd{$cmd}->[0]->(@ARGV);
78exit 0;
79####################### primary functions ######################
81sub usage {
82 my $exit = shift || 0;
83 my $fd = $exit ? \*STDERR : \*STDOUT;
84 print $fd <<"";
85git-svn - bidirectional operations between a single Subversion tree and git
86Usage: $0 <command> [options] [arguments]\n
87Available commands:
88 foreach (sort keys %cmd) {
90 print $fd ' ',pack('A10',$_),$cmd{$_}->[1],"\n";
91 }
92 print $fd <<"";
93\nGIT_SVN_ID may be set in the environment to an arbitrary identifier if
94you're tracking multiple SVN branches/repositories in one git repository
95and want to keep them separate.
96 exit $exit;
98}
99sub version {
101 print "git-svn version $VERSION\n";
102 exit 0;
103}
104sub rebuild {
106 $SVN_URL = shift or undef;
107 my $repo_uuid;
108 my $newest_rev = 0;
109 my $pid = open(my $rev_list,'-|');
111 defined $pid or croak $!;
112 if ($pid == 0) {
113 exec("git-rev-list","$GIT_SVN-HEAD") or croak $!;
114 }
115 my $first;
116 while (<$rev_list>) {
117 chomp;
118 my $c = $_;
119 croak "Non-SHA1: $c\n" unless $c =~ /^$sha1$/o;
120 my @commit = grep(/^git-svn-id: /,`git-cat-file commit $c`);
121 next if (!@commit); # skip merges
122 my $id = $commit[$#commit];
123 my ($url, $rev, $uuid) = ($id =~ /^git-svn-id:\s(\S+?)\@(\d+)
124 \s([a-f\d\-]+)$/x);
125 if (!$rev || !$uuid || !$url) {
126 # some of the original repositories I made had
127 # indentifiers like this:
128 ($rev, $uuid) = ($id =~/^git-svn-id:\s(\d+)
129 \@([a-f\d\-]+)/x);
130 if (!$rev || !$uuid) {
131 croak "Unable to extract revision or UUID from ",
132 "$c, $id\n";
133 }
134 }
135 print "r$rev = $c\n";
136 unless (defined $first) {
137 if (!$SVN_URL && !$url) {
138 croak "SVN repository location required: $url\n";
139 }
140 $SVN_URL ||= $url;
141 $repo_uuid = setup_git_svn();
142 $first = $rev;
143 }
144 if ($uuid ne $repo_uuid) {
145 croak "Repository UUIDs do not match!\ngot: $uuid\n",
146 "expected: $repo_uuid\n";
147 }
148 assert_revision_eq_or_unknown($rev, $c);
149 sys('git-update-ref',"$GIT_SVN/revs/$rev",$c);
150 $newest_rev = $rev if ($rev > $newest_rev);
151 }
152 close $rev_list or croak $?;
153 if (!chdir $SVN_WC) {
154 my @svn_co = ('svn','co',"-r$first");
155 push @svn_co, '--ignore-externals' unless $_no_ignore_ext;
156 sys(@svn_co, $SVN_URL, $SVN_WC);
157 chdir $SVN_WC or croak $!;
158 }
159 $pid = fork;
161 defined $pid or croak $!;
162 if ($pid == 0) {
163 my @svn_up = qw(svn up);
164 push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
165 sys(@svn_up,"-r$newest_rev");
166 $ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX;
167 git_addremove();
168 exec('git-write-tree');
169 }
170 waitpid $pid, 0;
171}
172sub init {
174 $SVN_URL = shift or croak "SVN repository location required\n";
175 unless (-d $GIT_DIR) {
176 sys('git-init-db');
177 }
178 setup_git_svn();
179}
180sub fetch {
182 my (@parents) = @_;
183 $SVN_URL ||= file_to_s("$GIT_DIR/$GIT_SVN/info/url");
184 my @log_args = -d $SVN_WC ? ($SVN_WC) : ($SVN_URL);
185 unless ($_revision) {
186 $_revision = -d $SVN_WC ? 'BASE:HEAD' : '0:HEAD';
187 }
188 push @log_args, "-r$_revision";
189 push @log_args, '--stop-on-copy' unless $_no_stop_copy;
190 my $svn_log = svn_log_raw(@log_args);
192 @$svn_log = sort { $a->{revision} <=> $b->{revision} } @$svn_log;
193 my $base = shift @$svn_log or croak "No base revision!\n";
195 my $last_commit = undef;
196 unless (-d $SVN_WC) {
197 my @svn_co = ('svn','co',"-r$base->{revision}");
198 push @svn_co,'--ignore-externals' unless $_no_ignore_ext;
199 sys(@svn_co, $SVN_URL, $SVN_WC);
200 chdir $SVN_WC or croak $!;
201 $last_commit = git_commit($base, @parents);
202 unless (-f "$GIT_DIR/refs/heads/master") {
203 sys(qw(git-update-ref refs/heads/master),$last_commit);
204 }
205 assert_svn_wc_clean($base->{revision}, $last_commit);
206 } else {
207 chdir $SVN_WC or croak $!;
208 $last_commit = file_to_s("$REV_DIR/$base->{revision}");
209 }
210 my @svn_up = qw(svn up);
211 push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
212 my $last_rev = $base->{revision};
213 foreach my $log_msg (@$svn_log) {
214 assert_svn_wc_clean($last_rev, $last_commit);
215 $last_rev = $log_msg->{revision};
216 sys(@svn_up,"-r$last_rev");
217 $last_commit = git_commit($log_msg, $last_commit, @parents);
218 }
219 assert_svn_wc_clean($last_rev, $last_commit);
220 return pop @$svn_log;
221}
222sub commit {
224 my (@commits) = @_;
225 if ($_stdin || !@commits) {
226 print "Reading from stdin...\n";
227 @commits = ();
228 while (<STDIN>) {
229 if (/\b([a-f\d]{6,40})\b/) {
230 unshift @commits, $1;
231 }
232 }
233 }
234 my @revs;
235 foreach my $c (@commits) {
236 chomp(my @tmp = safe_qx('git-rev-parse',$c));
237 if (scalar @tmp == 1) {
238 push @revs, $tmp[0];
239 } elsif (scalar @tmp > 1) {
240 push @revs, reverse (safe_qx('git-rev-list',@tmp));
241 } else {
242 die "Failed to rev-parse $c\n";
243 }
244 }
245 chomp @revs;
246 fetch();
248 chdir $SVN_WC or croak $!;
249 my $svn_current_rev = svn_info('.')->{'Last Changed Rev'};
250 foreach my $c (@revs) {
251 print "Committing $c\n";
252 my $mods = svn_checkout_tree($svn_current_rev, $c);
253 if (scalar @$mods == 0) {
254 print "Skipping, no changes detected\n";
255 next;
256 }
257 $svn_current_rev = svn_commit_tree($svn_current_rev, $c);
258 }
259 print "Done committing ",scalar @revs," revisions to SVN\n";
260}
262sub show_ignore {
264 require File::Find or die $!;
265 my $exclude_file = "$GIT_DIR/info/exclude";
266 open my $fh, '<', $exclude_file or croak $!;
267 chomp(my @excludes = (<$fh>));
268 close $fh or croak $!;
269 $SVN_URL ||= file_to_s("$GIT_DIR/$GIT_SVN/info/url");
271 chdir $SVN_WC or croak $!;
272 my %ign;
273 File::Find::find({wanted=>sub{if(lstat $_ && -d _ && -d "$_/.svn"){
274 s#^\./##;
275 @{$ign{$_}} = safe_qx(qw(svn propget svn:ignore),$_);
276 }}, no_chdir=>1},'.');
277 print "\n# /\n";
279 foreach (@{$ign{'.'}}) { print '/',$_ if /\S/ }
280 delete $ign{'.'};
281 foreach my $i (sort keys %ign) {
282 print "\n# ",$i,"\n";
283 foreach (@{$ign{$i}}) { print '/',$i,'/',$_ if /\S/ }
284 }
285}
286########################### utility functions #########################
288sub setup_git_svn {
290 defined $SVN_URL or croak "SVN repository location required\n";
291 unless (-d $GIT_DIR) {
292 croak "GIT_DIR=$GIT_DIR does not exist!\n";
293 }
294 mkpath(["$GIT_DIR/$GIT_SVN"]);
295 mkpath(["$GIT_DIR/$GIT_SVN/info"]);
296 mkpath([$REV_DIR]);
297 s_to_file($SVN_URL,"$GIT_DIR/$GIT_SVN/info/url");
298 my $uuid = svn_info($SVN_URL)->{'Repository UUID'} or
299 croak "Repository UUID unreadable\n";
300 s_to_file($uuid,"$GIT_DIR/$GIT_SVN/info/uuid");
301 open my $fd, '>>', "$GIT_DIR/$GIT_SVN/info/exclude" or croak $!;
303 print $fd '.svn',"\n";
304 close $fd or croak $!;
305 return $uuid;
306}
307sub assert_svn_wc_clean {
309 my ($svn_rev, $treeish) = @_;
310 croak "$svn_rev is not an integer!\n" unless ($svn_rev =~ /^\d+$/);
311 croak "$treeish is not a sha1!\n" unless ($treeish =~ /^$sha1$/o);
312 my $svn_info = svn_info('.');
313 if ($svn_rev != $svn_info->{'Last Changed Rev'}) {
314 croak "Expected r$svn_rev, got r",
315 $svn_info->{'Last Changed Rev'},"\n";
316 }
317 my @status = grep(!/^Performing status on external/,(`svn status`));
318 @status = grep(!/^\s*$/,@status);
319 if (scalar @status) {
320 print STDERR "Tree ($SVN_WC) is not clean:\n";
321 print STDERR $_ foreach @status;
322 croak;
323 }
324 assert_tree($treeish);
325}
326sub assert_tree {
328 my ($treeish) = @_;
329 croak "Not a sha1: $treeish\n" unless $treeish =~ /^$sha1$/o;
330 chomp(my $type = `git-cat-file -t $treeish`);
331 my $expected;
332 while ($type eq 'tag') {
333 chomp(($treeish, $type) = `git-cat-file tag $treeish`);
334 }
335 if ($type eq 'commit') {
336 $expected = (grep /^tree /,`git-cat-file commit $treeish`)[0];
337 ($expected) = ($expected =~ /^tree ($sha1)$/);
338 die "Unable to get tree from $treeish\n" unless $expected;
339 } elsif ($type eq 'tree') {
340 $expected = $treeish;
341 } else {
342 die "$treeish is a $type, expected tree, tag or commit\n";
343 }
344 my $old_index = $ENV{GIT_INDEX_FILE};
346 my $tmpindex = $GIT_SVN_INDEX.'.assert-tmp';
347 if (-e $tmpindex) {
348 unlink $tmpindex or croak $!;
349 }
350 $ENV{GIT_INDEX_FILE} = $tmpindex;
351 git_addremove();
352 chomp(my $tree = `git-write-tree`);
353 if ($old_index) {
354 $ENV{GIT_INDEX_FILE} = $old_index;
355 } else {
356 delete $ENV{GIT_INDEX_FILE};
357 }
358 if ($tree ne $expected) {
359 croak "Tree mismatch, Got: $tree, Expected: $expected\n";
360 }
361}
362sub parse_diff_tree {
364 my $diff_fh = shift;
365 local $/ = "\0";
366 my $state = 'meta';
367 my @mods;
368 while (<$diff_fh>) {
369 chomp $_; # this gets rid of the trailing "\0"
370 if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s
371 $sha1\s($sha1)\s([MTCRAD])\d*$/xo) {
372 push @mods, { mode_a => $1, mode_b => $2,
373 sha1_b => $3, chg => $4 };
374 if ($4 =~ /^(?:C|R)$/) {
375 $state = 'file_a';
376 } else {
377 $state = 'file_b';
378 }
379 } elsif ($state eq 'file_a') {
380 my $x = $mods[$#mods] or croak "Empty array\n";
381 if ($x->{chg} !~ /^(?:C|R)$/) {
382 croak "Error parsing $_, $x->{chg}\n";
383 }
384 $x->{file_a} = $_;
385 $state = 'file_b';
386 } elsif ($state eq 'file_b') {
387 my $x = $mods[$#mods] or croak "Empty array\n";
388 if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) {
389 croak "Error parsing $_, $x->{chg}\n";
390 }
391 if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) {
392 croak "Error parsing $_, $x->{chg}\n";
393 }
394 $x->{file_b} = $_;
395 $state = 'meta';
396 } else {
397 croak "Error parsing $_\n";
398 }
399 }
400 close $diff_fh or croak $!;
401 return \@mods;
403}
404sub svn_check_prop_executable {
406 my $m = shift;
407 return if -l $m->{file_b};
408 if ($m->{mode_b} =~ /755$/) {
409 chmod((0755 &~ umask),$m->{file_b}) or croak $!;
410 if ($m->{mode_a} !~ /755$/) {
411 sys(qw(svn propset svn:executable 1), $m->{file_b});
412 }
413 -x $m->{file_b} or croak "$m->{file_b} is not executable!\n";
414 } elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) {
415 sys(qw(svn propdel svn:executable), $m->{file_b});
416 chmod((0644 &~ umask),$m->{file_b}) or croak $!;
417 -x $m->{file_b} and croak "$m->{file_b} is executable!\n";
418 }
419}
420sub svn_ensure_parent_path {
422 my $dir_b = dirname(shift);
423 svn_ensure_parent_path($dir_b) if ($dir_b ne File::Spec->curdir);
424 mkpath([$dir_b]) unless (-d $dir_b);
425 sys(qw(svn add -N), $dir_b) unless (-d "$dir_b/.svn");
426}
427sub precommit_check {
429 my $mods = shift;
430 my (%rm_file, %rmdir_check, %added_check);
431 my %o = ( D => 0, R => 1, C => 2, A => 3, M => 3, T => 3 );
433 foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) {
434 if ($m->{chg} eq 'R') {
435 if (-d $m->{file_b}) {
436 err_dir_to_file("$m->{file_a} => $m->{file_b}");
437 }
438 # dir/$file => dir/file/$file
439 my $dirname = dirname($m->{file_b});
440 while ($dirname ne File::Spec->curdir) {
441 if ($dirname ne $m->{file_a}) {
442 $dirname = dirname($dirname);
443 next;
444 }
445 err_file_to_dir("$m->{file_a} => $m->{file_b}");
446 }
447 # baz/zzz => baz (baz is a file)
448 $dirname = dirname($m->{file_a});
449 while ($dirname ne File::Spec->curdir) {
450 if ($dirname ne $m->{file_b}) {
451 $dirname = dirname($dirname);
452 next;
453 }
454 err_dir_to_file("$m->{file_a} => $m->{file_b}");
455 }
456 }
457 if ($m->{chg} =~ /^(D|R)$/) {
458 my $t = $1 eq 'D' ? 'file_b' : 'file_a';
459 $rm_file{ $m->{$t} } = 1;
460 my $dirname = dirname( $m->{$t} );
461 my $basename = basename( $m->{$t} );
462 $rmdir_check{$dirname}->{$basename} = 1;
463 } elsif ($m->{chg} =~ /^(?:A|C)$/) {
464 if (-d $m->{file_b}) {
465 err_dir_to_file($m->{file_b});
466 }
467 my $dirname = dirname( $m->{file_b} );
468 my $basename = basename( $m->{file_b} );
469 $added_check{$dirname}->{$basename} = 1;
470 while ($dirname ne File::Spec->curdir) {
471 if ($rm_file{$dirname}) {
472 err_file_to_dir($m->{file_b});
473 }
474 $dirname = dirname $dirname;
475 }
476 }
477 }
478 return (\%rmdir_check, \%added_check);
479 sub err_dir_to_file {
481 my $file = shift;
482 print STDERR "Node change from directory to file ",
483 "is not supported by Subversion: ",$file,"\n";
484 exit 1;
485 }
486 sub err_file_to_dir {
487 my $file = shift;
488 print STDERR "Node change from file to directory ",
489 "is not supported by Subversion: ",$file,"\n";
490 exit 1;
491 }
492}
493sub svn_checkout_tree {
495 my ($svn_rev, $treeish) = @_;
496 my $from = file_to_s("$REV_DIR/$svn_rev");
497 assert_svn_wc_clean($svn_rev,$from);
498 print "diff-tree '$from' '$treeish'\n";
499 my $pid = open my $diff_fh, '-|';
500 defined $pid or croak $!;
501 if ($pid == 0) {
502 my @diff_tree = qw(git-diff-tree -z -r -C);
503 push @diff_tree, '--find-copies-harder' if $_find_copies_harder;
504 push @diff_tree, "-l$_l" if defined $_l;
505 exec(@diff_tree, $from, $treeish) or croak $!;
506 }
507 my $mods = parse_diff_tree($diff_fh);
508 unless (@$mods) {
509 # git can do empty commits, SVN doesn't allow it...
510 return $mods;
511 }
512 my ($rm, $add) = precommit_check($mods);
513 my %o = ( D => 1, R => 0, C => -1, A => 3, M => 3, T => 3 );
515 foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) {
516 if ($m->{chg} eq 'C') {
517 svn_ensure_parent_path( $m->{file_b} );
518 sys(qw(svn cp), $m->{file_a}, $m->{file_b});
519 apply_mod_line_blob($m);
520 svn_check_prop_executable($m);
521 } elsif ($m->{chg} eq 'D') {
522 sys(qw(svn rm --force), $m->{file_b});
523 } elsif ($m->{chg} eq 'R') {
524 svn_ensure_parent_path( $m->{file_b} );
525 sys(qw(svn mv --force), $m->{file_a}, $m->{file_b});
526 apply_mod_line_blob($m);
527 svn_check_prop_executable($m);
528 } elsif ($m->{chg} eq 'M') {
529 apply_mod_line_blob($m);
530 svn_check_prop_executable($m);
531 } elsif ($m->{chg} eq 'T') {
532 sys(qw(svn rm --force),$m->{file_b});
533 apply_mod_line_blob($m);
534 sys(qw(svn add --force), $m->{file_b});
535 svn_check_prop_executable($m);
536 } elsif ($m->{chg} eq 'A') {
537 svn_ensure_parent_path( $m->{file_b} );
538 apply_mod_line_blob($m);
539 sys(qw(svn add --force), $m->{file_b});
540 svn_check_prop_executable($m);
541 } else {
542 croak "Invalid chg: $m->{chg}\n";
543 }
544 }
545 assert_tree($treeish);
547 if ($_rmdir) { # remove empty directories
548 handle_rmdir($rm, $add);
549 }
550 assert_tree($treeish);
551 return $mods;
552}
553# svn ls doesn't work with respect to the current working tree, but what's
555# in the repository. There's not even an option for it... *sigh*
556# (added files don't show up and removed files remain in the ls listing)
557sub svn_ls_current {
558 my ($dir, $rm, $add) = @_;
559 chomp(my @ls = safe_qx('svn','ls',$dir));
560 my @ret = ();
561 foreach (@ls) {
562 s#/$##; # trailing slashes are evil
563 push @ret, $_ unless $rm->{$dir}->{$_};
564 }
565 if (exists $add->{$dir}) {
566 push @ret, keys %{$add->{$dir}};
567 }
568 return \@ret;
569}
570sub handle_rmdir {
572 my ($rm, $add) = @_;
573 foreach my $dir (sort {length $b <=> length $a} keys %$rm) {
575 my $ls = svn_ls_current($dir, $rm, $add);
576 next if (scalar @$ls);
577 sys(qw(svn rm --force),$dir);
578 my $dn = dirname $dir;
580 $rm->{ $dn }->{ basename $dir } = 1;
581 $ls = svn_ls_current($dn, $rm, $add);
582 while (scalar @$ls == 0 && $dn ne File::Spec->curdir) {
583 sys(qw(svn rm --force),$dn);
584 $dir = basename $dn;
585 $dn = dirname $dn;
586 $rm->{ $dn }->{ $dir } = 1;
587 $ls = svn_ls_current($dn, $rm, $add);
588 }
589 }
590}
591sub svn_commit_tree {
593 my ($svn_rev, $commit) = @_;
594 my $commit_msg = "$GIT_DIR/$GIT_SVN/.svn-commit.tmp.$$";
595 my %log_msg = ( msg => '' );
596 open my $msg, '>', $commit_msg or croak $!;
597 chomp(my $type = `git-cat-file -t $commit`);
599 if ($type eq 'commit') {
600 my $pid = open my $msg_fh, '-|';
601 defined $pid or croak $!;
602 if ($pid == 0) {
604 exec(qw(git-cat-file commit), $commit) or croak $!;
605 }
606 my $in_msg = 0;
607 while (<$msg_fh>) {
608 if (!$in_msg) {
609 $in_msg = 1 if (/^\s*$/);
610 } else {
611 $log_msg{msg} .= $_;
612 print $msg $_ or croak $!;
613 }
614 }
615 close $msg_fh or croak $!;
616 }
617 close $msg or croak $!;
618 if ($_edit || ($type eq 'tree')) {
620 my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi';
621 system($editor, $commit_msg);
622 }
623 my @ci_output = safe_qx(qw(svn commit -F),$commit_msg);
624 my ($committed) = grep(/^Committed revision \d+\./,@ci_output);
625 unlink $commit_msg;
626 defined $committed or croak
627 "Commit output failed to parse committed revision!\n",
628 join("\n",@ci_output),"\n";
629 my ($rev_committed) = ($committed =~ /^Committed revision (\d+)\./);
630 my @svn_up = qw(svn up);
632 push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
633 if ($rev_committed == ($svn_rev + 1)) {
634 push @svn_up, "-r$rev_committed";
635 sys(@svn_up);
636 my $info = svn_info('.');
637 my $date = $info->{'Last Changed Date'} or die "Missing date\n";
638 if ($info->{'Last Changed Rev'} != $rev_committed) {
639 croak "$info->{'Last Changed Rev'} != $rev_committed\n"
640 }
641 my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~
642 /(\d{4})\-(\d\d)\-(\d\d)\s
643 (\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x)
644 or croak "Failed to parse date: $date\n";
645 $log_msg{date} = "$tz $Y-$m-$d $H:$M:$S";
646 $log_msg{author} = $info->{'Last Changed Author'};
647 $log_msg{revision} = $rev_committed;
648 $log_msg{msg} .= "\n";
649 my $parent = file_to_s("$REV_DIR/$svn_rev");
650 git_commit(\%log_msg, $parent, $commit);
651 return $rev_committed;
652 }
653 # resync immediately
654 push @svn_up, "-r$svn_rev";
655 sys(@svn_up);
656 return fetch("$rev_committed=$commit")->{revision};
657}
658sub svn_log_raw {
660 my (@log_args) = @_;
661 my $pid = open my $log_fh,'-|';
662 defined $pid or croak $!;
663 if ($pid == 0) {
665 exec (qw(svn log), @log_args) or croak $!
666 }
667 my @svn_log;
669 my $state = 'sep';
670 while (<$log_fh>) {
671 chomp;
672 if (/^\-{72}$/) {
673 if ($state eq 'msg') {
674 if ($svn_log[$#svn_log]->{lines}) {
675 $svn_log[$#svn_log]->{msg} .= $_."\n";
676 unless(--$svn_log[$#svn_log]->{lines}) {
677 $state = 'sep';
678 }
679 } else {
680 croak "Log parse error at: $_\n",
681 $svn_log[$#svn_log]->{revision},
682 "\n";
683 }
684 next;
685 }
686 if ($state ne 'sep') {
687 croak "Log parse error at: $_\n",
688 "state: $state\n",
689 $svn_log[$#svn_log]->{revision},
690 "\n";
691 }
692 $state = 'rev';
693 # if we have an empty log message, put something there:
695 if (@svn_log) {
696 $svn_log[$#svn_log]->{msg} ||= "\n";
697 delete $svn_log[$#svn_log]->{lines};
698 }
699 next;
700 }
701 if ($state eq 'rev' && s/^r(\d+)\s*\|\s*//) {
702 my $rev = $1;
703 my ($author, $date, $lines) = split(/\s*\|\s*/, $_, 3);
704 ($lines) = ($lines =~ /(\d+)/);
705 my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~
706 /(\d{4})\-(\d\d)\-(\d\d)\s
707 (\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x)
708 or croak "Failed to parse date: $date\n";
709 my %log_msg = ( revision => $rev,
710 date => "$tz $Y-$m-$d $H:$M:$S",
711 author => $author,
712 lines => $lines,
713 msg => '' );
714 push @svn_log, \%log_msg;
715 $state = 'msg_start';
716 next;
717 }
718 # skip the first blank line of the message:
719 if ($state eq 'msg_start' && /^$/) {
720 $state = 'msg';
721 } elsif ($state eq 'msg') {
722 if ($svn_log[$#svn_log]->{lines}) {
723 $svn_log[$#svn_log]->{msg} .= $_."\n";
724 unless (--$svn_log[$#svn_log]->{lines}) {
725 $state = 'sep';
726 }
727 } else {
728 croak "Log parse error at: $_\n",
729 $svn_log[$#svn_log]->{revision},"\n";
730 }
731 }
732 }
733 close $log_fh or croak $?;
734 return \@svn_log;
735}
736sub svn_info {
738 my $url = shift || $SVN_URL;
739 my $pid = open my $info_fh, '-|';
741 defined $pid or croak $!;
742 if ($pid == 0) {
744 exec(qw(svn info),$url) or croak $!;
745 }
746 my $ret = {};
748 # only single-lines seem to exist in svn info output
749 while (<$info_fh>) {
750 chomp $_;
751 if (m#^([^:]+)\s*:\s*(\S.*)$#) {
752 $ret->{$1} = $2;
753 push @{$ret->{-order}}, $1;
754 }
755 }
756 close $info_fh or croak $!;
757 return $ret;
758}
759sub sys { system(@_) == 0 or croak $? }
761sub git_addremove {
763 system( "git-diff-files --name-only -z ".
764 " | git-update-index --remove -z --stdin && ".
765 "git-ls-files -z --others ".
766 "'--exclude-from=$GIT_DIR/$GIT_SVN/info/exclude'".
767 " | git-update-index --add -z --stdin"
768 ) == 0 or croak $?
769}
770sub s_to_file {
772 my ($str, $file, $mode) = @_;
773 open my $fd,'>',$file or croak $!;
774 print $fd $str,"\n" or croak $!;
775 close $fd or croak $!;
776 chmod ($mode &~ umask, $file) if (defined $mode);
777}
778sub file_to_s {
780 my $file = shift;
781 open my $fd,'<',$file or croak "$!: file: $file\n";
782 local $/;
783 my $ret = <$fd>;
784 close $fd or croak $!;
785 $ret =~ s/\s*$//s;
786 return $ret;
787}
788sub assert_revision_unknown {
790 my $revno = shift;
791 if (-f "$REV_DIR/$revno") {
792 croak "$REV_DIR/$revno already exists! ",
793 "Why are we refetching it?";
794 }
795}
796sub assert_revision_eq_or_unknown {
798 my ($revno, $commit) = @_;
799 if (-f "$REV_DIR/$revno") {
800 my $current = file_to_s("$REV_DIR/$revno");
801 if ($commit ne $current) {
802 croak "$REV_DIR/$revno already exists!\n",
803 "current: $current\nexpected: $commit\n";
804 }
805 return;
806 }
807}
808sub git_commit {
810 my ($log_msg, @parents) = @_;
811 assert_revision_unknown($log_msg->{revision});
812 my $out_fh = IO::File->new_tmpfile or croak $!;
813 my $info = svn_info('.');
814 my $uuid = $info->{'Repository UUID'};
815 defined $uuid or croak "Unable to get Repository UUID\n";
816 # commit parents can be conditionally bound to a particular
818 # svn revision via: "svn_revno=commit_sha1", filter them out here:
819 my @exec_parents;
820 foreach my $p (@parents) {
821 next unless defined $p;
822 if ($p =~ /^(\d+)=($sha1_short)$/o) {
823 if ($1 == $log_msg->{revision}) {
824 push @exec_parents, $2;
825 }
826 } else {
827 push @exec_parents, $p if $p =~ /$sha1_short/o;
828 }
829 }
830 my $pid = fork;
832 defined $pid or croak $!;
833 if ($pid == 0) {
834 $ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX;
835 git_addremove();
836 chomp(my $tree = `git-write-tree`);
837 croak if $?;
838 my $msg_fh = IO::File->new_tmpfile or croak $!;
839 print $msg_fh $log_msg->{msg}, "\ngit-svn-id: ",
840 "$SVN_URL\@$log_msg->{revision}",
841 " $uuid\n" or croak $!;
842 $msg_fh->flush == 0 or croak $!;
843 seek $msg_fh, 0, 0 or croak $!;
844 $ENV{GIT_AUTHOR_NAME} = $ENV{GIT_COMMITTER_NAME} =
846 $log_msg->{author};
847 $ENV{GIT_AUTHOR_EMAIL} = $ENV{GIT_COMMITTER_EMAIL} =
848 $log_msg->{author}."\@$uuid";
849 $ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} =
850 $log_msg->{date};
851 my @exec = ('git-commit-tree',$tree);
852 push @exec, '-p', $_ foreach @exec_parents;
853 open STDIN, '<&', $msg_fh or croak $!;
854 open STDOUT, '>&', $out_fh or croak $!;
855 exec @exec or croak $!;
856 }
857 waitpid($pid,0);
858 croak if $?;
859 $out_fh->flush == 0 or croak $!;
861 seek $out_fh, 0, 0 or croak $!;
862 chomp(my $commit = do { local $/; <$out_fh> });
863 if ($commit !~ /^$sha1$/o) {
864 croak "Failed to commit, invalid sha1: $commit\n";
865 }
866 my @update_ref = ('git-update-ref',"refs/heads/$GIT_SVN-HEAD",$commit);
867 if (my $primary_parent = shift @exec_parents) {
868 push @update_ref, $primary_parent;
869 }
870 sys(@update_ref);
871 sys('git-update-ref',"$GIT_SVN/revs/$log_msg->{revision}",$commit);
872 print "r$log_msg->{revision} = $commit\n";
873 return $commit;
874}
875sub apply_mod_line_blob {
877 my $m = shift;
878 if ($m->{mode_b} =~ /^120/) {
879 blob_to_symlink($m->{sha1_b}, $m->{file_b});
880 } else {
881 blob_to_file($m->{sha1_b}, $m->{file_b});
882 }
883}
884sub blob_to_symlink {
886 my ($blob, $link) = @_;
887 defined $link or croak "\$link not defined!\n";
888 croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o;
889 if (-l $link || -f _) {
890 unlink $link or croak $!;
891 }
892 my $dest = `git-cat-file blob $blob`; # no newline, so no chomp
894 symlink $dest, $link or croak $!;
895}
896sub blob_to_file {
898 my ($blob, $file) = @_;
899 defined $file or croak "\$file not defined!\n";
900 croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o;
901 if (-l $file || -f _) {
902 unlink $file or croak $!;
903 }
904 open my $blob_fh, '>', $file or croak "$!: $file\n";
906 my $pid = fork;
907 defined $pid or croak $!;
908 if ($pid == 0) {
910 open STDOUT, '>&', $blob_fh or croak $!;
911 exec('git-cat-file','blob',$blob);
912 }
913 waitpid $pid, 0;
914 croak $? if $?;
915 close $blob_fh or croak $!;
917}
918sub safe_qx {
920 my $pid = open my $child, '-|';
921 defined $pid or croak $!;
922 if ($pid == 0) {
923 exec(@_) or croak $?;
924 }
925 my @ret = (<$child>);
926 close $child or croak $?;
927 die $? if $?; # just in case close didn't error out
928 return wantarray ? @ret : join('',@ret);
929}
930sub svn_check_ignore_externals {
932 return if $_no_ignore_ext;
933 unless (grep /ignore-externals/,(safe_qx(qw(svn co -h)))) {
934 print STDERR "W: Installed svn version does not support ",
935 "--ignore-externals\n";
936 $_no_ignore_ext = 1;
937 }
938}
939__END__
940Data structures:
942@svn_log = array of log_msg hashes
944$log_msg hash
946{
947 msg => 'whitespace-formatted log entry
948', # trailing newline is preserved
949 revision => '8', # integer
950 date => '2004-02-24T17:01:44.108345Z', # commit date
951 author => 'committer name'
952};
953@mods = array of diff-index line hashes, each element represents one line
956 of diff-index output
957diff-index line ($m hash)
959{
960 mode_a => first column of diff-index output, no leading ':',
961 mode_b => second column of diff-index output,
962 sha1_b => sha1sum of the final blob,
963 chg => change type [MCRAD],
964 file_a => original file name of a file (iff chg is 'C' or 'R')
965 file_b => new/current file name of a file (any chg)
966}
967;