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3397f9df EW |
1 | #!/usr/bin/env perl |
2 | use warnings; | |
3 | use strict; | |
4 | use vars qw/ $AUTHOR $VERSION | |
5 | $SVN_URL $SVN_INFO $SVN_WC | |
6 | $GIT_SVN_INDEX $GIT_SVN | |
7 | $GIT_DIR $REV_DIR/; | |
8 | $AUTHOR = 'Eric Wong <normalperson@yhbt.net>'; | |
9 | $VERSION = '0.9.0'; | |
10 | $GIT_DIR = $ENV{GIT_DIR} || "$ENV{PWD}/.git"; | |
11 | $GIT_SVN = $ENV{GIT_SVN_ID} || 'git-svn'; | |
12 | $GIT_SVN_INDEX = "$GIT_DIR/$GIT_SVN/index"; | |
13 | $ENV{GIT_DIR} ||= $GIT_DIR; | |
14 | $SVN_URL = undef; | |
15 | $REV_DIR = "$GIT_DIR/$GIT_SVN/revs"; | |
16 | $SVN_WC = "$GIT_DIR/$GIT_SVN/tree"; | |
17 | ||
18 | # make sure the svn binary gives consistent output between locales and TZs: | |
19 | $ENV{TZ} = 'UTC'; | |
20 | $ENV{LC_ALL} = 'C'; | |
21 | ||
22 | # If SVN:: library support is added, please make the dependencies | |
23 | # optional and preserve the capability to use the command-line client. | |
ce6f3519 | 24 | # use eval { require SVN::... } to make it lazy load |
3397f9df EW |
25 | use Carp qw/croak/; |
26 | use IO::File qw//; | |
27 | use File::Basename qw/dirname basename/; | |
28 | use File::Path qw/mkpath/; | |
29 | use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/; | |
30 | use File::Spec qw//; | |
31 | my $sha1 = qr/[a-f\d]{40}/; | |
32 | my $sha1_short = qr/[a-f\d]{6,40}/; | |
72942938 EW |
33 | my ($_revision,$_stdin,$_no_ignore_ext,$_no_stop_copy,$_help,$_rmdir,$_edit, |
34 | $_find_copies_harder, $_l); | |
3397f9df EW |
35 | |
36 | GetOptions( 'revision|r=s' => \$_revision, | |
37 | 'no-ignore-externals' => \$_no_ignore_ext, | |
38 | 'stdin|' => \$_stdin, | |
39 | 'edit|e' => \$_edit, | |
40 | 'rmdir' => \$_rmdir, | |
41 | 'help|H|h' => \$_help, | |
72942938 EW |
42 | 'find-copies-harder' => \$_find_copies_harder, |
43 | 'l=i' => \$_l, | |
a18b6327 | 44 | 'no-stop-on-copy' => \$_no_stop_copy ); |
3397f9df EW |
45 | my %cmd = ( |
46 | fetch => [ \&fetch, "Download new revisions from SVN" ], | |
47 | init => [ \&init, "Initialize and fetch (import)"], | |
48 | commit => [ \&commit, "Commit git revisions to SVN" ], | |
49 | rebuild => [ \&rebuild, "Rebuild git-svn metadata (after git clone)" ], | |
50 | help => [ \&usage, "Show help" ], | |
51 | ); | |
52 | my $cmd; | |
53 | for (my $i = 0; $i < @ARGV; $i++) { | |
54 | if (defined $cmd{$ARGV[$i]}) { | |
55 | $cmd = $ARGV[$i]; | |
56 | splice @ARGV, $i, 1; | |
57 | last; | |
58 | } | |
59 | }; | |
60 | ||
61 | # we may be called as git-svn-(command), or git-svn(command). | |
62 | foreach (keys %cmd) { | |
63 | if (/git\-svn\-?($_)(?:\.\w+)?$/) { | |
64 | $cmd = $1; | |
65 | last; | |
66 | } | |
67 | } | |
68 | usage(0) if $_help; | |
69 | usage(1) unless (defined $cmd); | |
70 | svn_check_ignore_externals(); | |
71 | $cmd{$cmd}->[0]->(@ARGV); | |
72 | exit 0; | |
73 | ||
74 | ####################### primary functions ###################### | |
75 | sub usage { | |
76 | my $exit = shift || 0; | |
77 | my $fd = $exit ? \*STDERR : \*STDOUT; | |
78 | print $fd <<""; | |
79 | git-svn - bidirectional operations between a single Subversion tree and git | |
80 | Usage: $0 <command> [options] [arguments]\n | |
81 | Available commands: | |
82 | ||
83 | foreach (sort keys %cmd) { | |
84 | print $fd ' ',pack('A10',$_),$cmd{$_}->[1],"\n"; | |
85 | } | |
86 | print $fd <<""; | |
87 | \nGIT_SVN_ID may be set in the environment to an arbitrary identifier if | |
88 | you're tracking multiple SVN branches/repositories in one git repository | |
89 | and want to keep them separate. | |
90 | ||
91 | exit $exit; | |
92 | } | |
93 | ||
94 | sub rebuild { | |
95 | $SVN_URL = shift or undef; | |
96 | my $repo_uuid; | |
97 | my $newest_rev = 0; | |
98 | ||
99 | my $pid = open(my $rev_list,'-|'); | |
100 | defined $pid or croak $!; | |
101 | if ($pid == 0) { | |
102 | exec("git-rev-list","$GIT_SVN-HEAD") or croak $!; | |
103 | } | |
104 | my $first; | |
105 | while (<$rev_list>) { | |
106 | chomp; | |
107 | my $c = $_; | |
108 | croak "Non-SHA1: $c\n" unless $c =~ /^$sha1$/o; | |
109 | my @commit = grep(/^git-svn-id: /,`git-cat-file commit $c`); | |
110 | next if (!@commit); # skip merges | |
111 | my $id = $commit[$#commit]; | |
112 | my ($url, $rev, $uuid) = ($id =~ /^git-svn-id:\s(\S+?)\@(\d+) | |
113 | \s([a-f\d\-]+)$/x); | |
114 | if (!$rev || !$uuid || !$url) { | |
115 | # some of the original repositories I made had | |
116 | # indentifiers like this: | |
117 | ($rev, $uuid) = ($id =~/^git-svn-id:\s(\d+) | |
118 | \@([a-f\d\-]+)/x); | |
119 | if (!$rev || !$uuid) { | |
120 | croak "Unable to extract revision or UUID from ", | |
121 | "$c, $id\n"; | |
122 | } | |
123 | } | |
124 | print "r$rev = $c\n"; | |
125 | unless (defined $first) { | |
126 | if (!$SVN_URL && !$url) { | |
127 | croak "SVN repository location required: $url\n"; | |
128 | } | |
129 | $SVN_URL ||= $url; | |
130 | $repo_uuid = setup_git_svn(); | |
131 | $first = $rev; | |
132 | } | |
133 | if ($uuid ne $repo_uuid) { | |
134 | croak "Repository UUIDs do not match!\ngot: $uuid\n", | |
135 | "expected: $repo_uuid\n"; | |
136 | } | |
137 | assert_revision_eq_or_unknown($rev, $c); | |
138 | sys('git-update-ref',"$GIT_SVN/revs/$rev",$c); | |
139 | $newest_rev = $rev if ($rev > $newest_rev); | |
140 | } | |
141 | close $rev_list or croak $?; | |
142 | if (!chdir $SVN_WC) { | |
143 | my @svn_co = ('svn','co',"-r$first"); | |
144 | push @svn_co, '--ignore-externals' unless $_no_ignore_ext; | |
145 | sys(@svn_co, $SVN_URL, $SVN_WC); | |
146 | chdir $SVN_WC or croak $!; | |
147 | } | |
148 | ||
149 | $pid = fork; | |
150 | defined $pid or croak $!; | |
151 | if ($pid == 0) { | |
152 | my @svn_up = qw(svn up); | |
153 | push @svn_up, '--ignore-externals' unless $_no_ignore_ext; | |
154 | sys(@svn_up,"-r$newest_rev"); | |
155 | $ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX; | |
156 | git_addremove(); | |
157 | exec('git-write-tree'); | |
158 | } | |
159 | waitpid $pid, 0; | |
160 | } | |
161 | ||
162 | sub init { | |
163 | $SVN_URL = shift or croak "SVN repository location required\n"; | |
164 | unless (-d $GIT_DIR) { | |
165 | sys('git-init-db'); | |
166 | } | |
167 | setup_git_svn(); | |
168 | } | |
169 | ||
170 | sub fetch { | |
171 | my (@parents) = @_; | |
172 | $SVN_URL ||= file_to_s("$GIT_DIR/$GIT_SVN/info/url"); | |
173 | my @log_args = -d $SVN_WC ? ($SVN_WC) : ($SVN_URL); | |
defc6492 EW |
174 | unless ($_revision) { |
175 | $_revision = -d $SVN_WC ? 'BASE:HEAD' : '0:HEAD'; | |
3397f9df | 176 | } |
defc6492 | 177 | push @log_args, "-r$_revision"; |
3397f9df EW |
178 | push @log_args, '--stop-on-copy' unless $_no_stop_copy; |
179 | ||
ce6f3519 | 180 | my $svn_log = svn_log_raw(@log_args); |
defc6492 | 181 | @$svn_log = sort { $a->{revision} <=> $b->{revision} } @$svn_log; |
3397f9df EW |
182 | |
183 | my $base = shift @$svn_log or croak "No base revision!\n"; | |
184 | my $last_commit = undef; | |
185 | unless (-d $SVN_WC) { | |
186 | my @svn_co = ('svn','co',"-r$base->{revision}"); | |
187 | push @svn_co,'--ignore-externals' unless $_no_ignore_ext; | |
188 | sys(@svn_co, $SVN_URL, $SVN_WC); | |
189 | chdir $SVN_WC or croak $!; | |
190 | $last_commit = git_commit($base, @parents); | |
191 | unless (-f "$GIT_DIR/refs/heads/master") { | |
192 | sys(qw(git-update-ref refs/heads/master),$last_commit); | |
193 | } | |
194 | assert_svn_wc_clean($base->{revision}, $last_commit); | |
195 | } else { | |
196 | chdir $SVN_WC or croak $!; | |
197 | $last_commit = file_to_s("$REV_DIR/$base->{revision}"); | |
198 | } | |
199 | my @svn_up = qw(svn up); | |
200 | push @svn_up, '--ignore-externals' unless $_no_ignore_ext; | |
201 | my $last_rev = $base->{revision}; | |
202 | foreach my $log_msg (@$svn_log) { | |
203 | assert_svn_wc_clean($last_rev, $last_commit); | |
204 | $last_rev = $log_msg->{revision}; | |
205 | sys(@svn_up,"-r$last_rev"); | |
206 | $last_commit = git_commit($log_msg, $last_commit, @parents); | |
207 | } | |
208 | assert_svn_wc_clean($last_rev, $last_commit); | |
209 | return pop @$svn_log; | |
210 | } | |
211 | ||
212 | sub commit { | |
213 | my (@commits) = @_; | |
214 | if ($_stdin || !@commits) { | |
215 | print "Reading from stdin...\n"; | |
216 | @commits = (); | |
217 | while (<STDIN>) { | |
8de010ad | 218 | if (/\b([a-f\d]{6,40})\b/) { |
3397f9df EW |
219 | unshift @commits, $1; |
220 | } | |
221 | } | |
222 | } | |
223 | my @revs; | |
8de010ad EW |
224 | foreach my $c (@commits) { |
225 | chomp(my @tmp = safe_qx('git-rev-parse',$c)); | |
226 | if (scalar @tmp == 1) { | |
227 | push @revs, $tmp[0]; | |
228 | } elsif (scalar @tmp > 1) { | |
229 | push @revs, reverse (safe_qx('git-rev-list',@tmp)); | |
230 | } else { | |
231 | die "Failed to rev-parse $c\n"; | |
232 | } | |
3397f9df EW |
233 | } |
234 | chomp @revs; | |
235 | ||
236 | fetch(); | |
237 | chdir $SVN_WC or croak $!; | |
238 | my $svn_current_rev = svn_info('.')->{'Last Changed Rev'}; | |
239 | foreach my $c (@revs) { | |
240 | print "Committing $c\n"; | |
cf52b8f0 EW |
241 | my $mods = svn_checkout_tree($svn_current_rev, $c); |
242 | if (scalar @$mods == 0) { | |
243 | print "Skipping, no changes detected\n"; | |
244 | next; | |
245 | } | |
3397f9df EW |
246 | $svn_current_rev = svn_commit_tree($svn_current_rev, $c); |
247 | } | |
248 | print "Done committing ",scalar @revs," revisions to SVN\n"; | |
249 | ||
250 | } | |
251 | ||
252 | ########################### utility functions ######################### | |
253 | ||
254 | sub setup_git_svn { | |
255 | defined $SVN_URL or croak "SVN repository location required\n"; | |
256 | unless (-d $GIT_DIR) { | |
257 | croak "GIT_DIR=$GIT_DIR does not exist!\n"; | |
258 | } | |
259 | mkpath(["$GIT_DIR/$GIT_SVN"]); | |
260 | mkpath(["$GIT_DIR/$GIT_SVN/info"]); | |
261 | mkpath([$REV_DIR]); | |
262 | s_to_file($SVN_URL,"$GIT_DIR/$GIT_SVN/info/url"); | |
263 | my $uuid = svn_info($SVN_URL)->{'Repository UUID'} or | |
264 | croak "Repository UUID unreadable\n"; | |
265 | s_to_file($uuid,"$GIT_DIR/$GIT_SVN/info/uuid"); | |
266 | ||
267 | open my $fd, '>>', "$GIT_DIR/$GIT_SVN/info/exclude" or croak $!; | |
268 | print $fd '.svn',"\n"; | |
269 | close $fd or croak $!; | |
270 | return $uuid; | |
271 | } | |
272 | ||
273 | sub assert_svn_wc_clean { | |
cf52b8f0 | 274 | my ($svn_rev, $treeish) = @_; |
3397f9df | 275 | croak "$svn_rev is not an integer!\n" unless ($svn_rev =~ /^\d+$/); |
cf52b8f0 | 276 | croak "$treeish is not a sha1!\n" unless ($treeish =~ /^$sha1$/o); |
3397f9df EW |
277 | my $svn_info = svn_info('.'); |
278 | if ($svn_rev != $svn_info->{'Last Changed Rev'}) { | |
279 | croak "Expected r$svn_rev, got r", | |
280 | $svn_info->{'Last Changed Rev'},"\n"; | |
281 | } | |
282 | my @status = grep(!/^Performing status on external/,(`svn status`)); | |
283 | @status = grep(!/^\s*$/,@status); | |
284 | if (scalar @status) { | |
285 | print STDERR "Tree ($SVN_WC) is not clean:\n"; | |
286 | print STDERR $_ foreach @status; | |
287 | croak; | |
288 | } | |
cf52b8f0 EW |
289 | assert_tree($treeish); |
290 | } | |
291 | ||
292 | sub assert_tree { | |
293 | my ($treeish) = @_; | |
294 | croak "Not a sha1: $treeish\n" unless $treeish =~ /^$sha1$/o; | |
295 | chomp(my $type = `git-cat-file -t $treeish`); | |
296 | my $expected; | |
297 | while ($type eq 'tag') { | |
298 | chomp(($treeish, $type) = `git-cat-file tag $treeish`); | |
299 | } | |
300 | if ($type eq 'commit') { | |
301 | $expected = (grep /^tree /,`git-cat-file commit $treeish`)[0]; | |
302 | ($expected) = ($expected =~ /^tree ($sha1)$/); | |
303 | die "Unable to get tree from $treeish\n" unless $expected; | |
304 | } elsif ($type eq 'tree') { | |
305 | $expected = $treeish; | |
306 | } else { | |
307 | die "$treeish is a $type, expected tree, tag or commit\n"; | |
308 | } | |
309 | ||
310 | my $old_index = $ENV{GIT_INDEX_FILE}; | |
311 | my $tmpindex = $GIT_SVN_INDEX.'.assert-tmp'; | |
312 | if (-e $tmpindex) { | |
313 | unlink $tmpindex or croak $!; | |
314 | } | |
315 | $ENV{GIT_INDEX_FILE} = $tmpindex; | |
316 | git_addremove(); | |
317 | chomp(my $tree = `git-write-tree`); | |
318 | if ($old_index) { | |
319 | $ENV{GIT_INDEX_FILE} = $old_index; | |
320 | } else { | |
321 | delete $ENV{GIT_INDEX_FILE}; | |
322 | } | |
323 | if ($tree ne $expected) { | |
324 | croak "Tree mismatch, Got: $tree, Expected: $expected\n"; | |
3397f9df EW |
325 | } |
326 | } | |
327 | ||
328 | sub parse_diff_tree { | |
329 | my $diff_fh = shift; | |
330 | local $/ = "\0"; | |
331 | my $state = 'meta'; | |
332 | my @mods; | |
333 | while (<$diff_fh>) { | |
334 | chomp $_; # this gets rid of the trailing "\0" | |
3397f9df EW |
335 | if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s |
336 | $sha1\s($sha1)\s([MTCRAD])\d*$/xo) { | |
337 | push @mods, { mode_a => $1, mode_b => $2, | |
338 | sha1_b => $3, chg => $4 }; | |
339 | if ($4 =~ /^(?:C|R)$/) { | |
340 | $state = 'file_a'; | |
341 | } else { | |
342 | $state = 'file_b'; | |
343 | } | |
344 | } elsif ($state eq 'file_a') { | |
cf52b8f0 | 345 | my $x = $mods[$#mods] or croak "Empty array\n"; |
3397f9df | 346 | if ($x->{chg} !~ /^(?:C|R)$/) { |
cf52b8f0 | 347 | croak "Error parsing $_, $x->{chg}\n"; |
3397f9df EW |
348 | } |
349 | $x->{file_a} = $_; | |
350 | $state = 'file_b'; | |
351 | } elsif ($state eq 'file_b') { | |
cf52b8f0 | 352 | my $x = $mods[$#mods] or croak "Empty array\n"; |
3397f9df | 353 | if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) { |
cf52b8f0 | 354 | croak "Error parsing $_, $x->{chg}\n"; |
3397f9df EW |
355 | } |
356 | if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) { | |
cf52b8f0 | 357 | croak "Error parsing $_, $x->{chg}\n"; |
3397f9df EW |
358 | } |
359 | $x->{file_b} = $_; | |
360 | $state = 'meta'; | |
361 | } else { | |
cf52b8f0 | 362 | croak "Error parsing $_\n"; |
3397f9df EW |
363 | } |
364 | } | |
365 | close $diff_fh or croak $!; | |
cf52b8f0 | 366 | |
3397f9df EW |
367 | return \@mods; |
368 | } | |
369 | ||
370 | sub svn_check_prop_executable { | |
371 | my $m = shift; | |
cf52b8f0 EW |
372 | return if -l $m->{file_b}; |
373 | if ($m->{mode_b} =~ /755$/) { | |
374 | chmod((0755 &~ umask),$m->{file_b}) or croak $!; | |
375 | if ($m->{mode_a} !~ /755$/) { | |
376 | sys(qw(svn propset svn:executable 1), $m->{file_b}); | |
377 | } | |
378 | -x $m->{file_b} or croak "$m->{file_b} is not executable!\n"; | |
3397f9df EW |
379 | } elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) { |
380 | sys(qw(svn propdel svn:executable), $m->{file_b}); | |
cf52b8f0 EW |
381 | chmod((0644 &~ umask),$m->{file_b}) or croak $!; |
382 | -x $m->{file_b} and croak "$m->{file_b} is executable!\n"; | |
3397f9df EW |
383 | } |
384 | } | |
385 | ||
386 | sub svn_ensure_parent_path { | |
387 | my $dir_b = dirname(shift); | |
388 | svn_ensure_parent_path($dir_b) if ($dir_b ne File::Spec->curdir); | |
389 | mkpath([$dir_b]) unless (-d $dir_b); | |
390 | sys(qw(svn add -N), $dir_b) unless (-d "$dir_b/.svn"); | |
391 | } | |
392 | ||
cf52b8f0 EW |
393 | sub precommit_check { |
394 | my $mods = shift; | |
395 | my (%rm_file, %rmdir_check, %added_check); | |
396 | ||
397 | my %o = ( D => 0, R => 1, C => 2, A => 3, M => 3, T => 3 ); | |
398 | foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) { | |
399 | if ($m->{chg} eq 'R') { | |
400 | if (-d $m->{file_b}) { | |
401 | err_dir_to_file("$m->{file_a} => $m->{file_b}"); | |
402 | } | |
403 | # dir/$file => dir/file/$file | |
404 | my $dirname = dirname($m->{file_b}); | |
405 | while ($dirname ne File::Spec->curdir) { | |
406 | if ($dirname ne $m->{file_a}) { | |
407 | $dirname = dirname($dirname); | |
408 | next; | |
409 | } | |
410 | err_file_to_dir("$m->{file_a} => $m->{file_b}"); | |
411 | } | |
412 | # baz/zzz => baz (baz is a file) | |
413 | $dirname = dirname($m->{file_a}); | |
414 | while ($dirname ne File::Spec->curdir) { | |
415 | if ($dirname ne $m->{file_b}) { | |
416 | $dirname = dirname($dirname); | |
417 | next; | |
418 | } | |
419 | err_dir_to_file("$m->{file_a} => $m->{file_b}"); | |
420 | } | |
421 | } | |
422 | if ($m->{chg} =~ /^(D|R)$/) { | |
423 | my $t = $1 eq 'D' ? 'file_b' : 'file_a'; | |
424 | $rm_file{ $m->{$t} } = 1; | |
425 | my $dirname = dirname( $m->{$t} ); | |
426 | my $basename = basename( $m->{$t} ); | |
427 | $rmdir_check{$dirname}->{$basename} = 1; | |
428 | } elsif ($m->{chg} =~ /^(?:A|C)$/) { | |
429 | if (-d $m->{file_b}) { | |
430 | err_dir_to_file($m->{file_b}); | |
431 | } | |
432 | my $dirname = dirname( $m->{file_b} ); | |
433 | my $basename = basename( $m->{file_b} ); | |
434 | $added_check{$dirname}->{$basename} = 1; | |
435 | while ($dirname ne File::Spec->curdir) { | |
436 | if ($rm_file{$dirname}) { | |
437 | err_file_to_dir($m->{file_b}); | |
438 | } | |
439 | $dirname = dirname $dirname; | |
440 | } | |
441 | } | |
442 | } | |
443 | return (\%rmdir_check, \%added_check); | |
444 | ||
445 | sub err_dir_to_file { | |
446 | my $file = shift; | |
447 | print STDERR "Node change from directory to file ", | |
448 | "is not supported by Subversion: ",$file,"\n"; | |
449 | exit 1; | |
450 | } | |
451 | sub err_file_to_dir { | |
452 | my $file = shift; | |
453 | print STDERR "Node change from file to directory ", | |
454 | "is not supported by Subversion: ",$file,"\n"; | |
455 | exit 1; | |
456 | } | |
457 | } | |
458 | ||
3397f9df | 459 | sub svn_checkout_tree { |
cf52b8f0 | 460 | my ($svn_rev, $treeish) = @_; |
3397f9df EW |
461 | my $from = file_to_s("$REV_DIR/$svn_rev"); |
462 | assert_svn_wc_clean($svn_rev,$from); | |
cf52b8f0 | 463 | print "diff-tree '$from' '$treeish'\n"; |
3397f9df EW |
464 | my $pid = open my $diff_fh, '-|'; |
465 | defined $pid or croak $!; | |
466 | if ($pid == 0) { | |
72942938 EW |
467 | my @diff_tree = qw(git-diff-tree -z -r -C); |
468 | push @diff_tree, '--find-copies-harder' if $_find_copies_harder; | |
469 | push @diff_tree, "-l$_l" if defined $_l; | |
cf52b8f0 | 470 | exec(@diff_tree, $from, $treeish) or croak $!; |
3397f9df EW |
471 | } |
472 | my $mods = parse_diff_tree($diff_fh); | |
473 | unless (@$mods) { | |
474 | # git can do empty commits, SVN doesn't allow it... | |
cf52b8f0 | 475 | return $mods; |
3397f9df | 476 | } |
cf52b8f0 EW |
477 | my ($rm, $add) = precommit_check($mods); |
478 | ||
479 | my %o = ( D => 1, R => 0, C => -1, A => 3, M => 3, T => 3 ); | |
480 | foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) { | |
3397f9df EW |
481 | if ($m->{chg} eq 'C') { |
482 | svn_ensure_parent_path( $m->{file_b} ); | |
483 | sys(qw(svn cp), $m->{file_a}, $m->{file_b}); | |
cf52b8f0 | 484 | apply_mod_line_blob($m); |
3397f9df EW |
485 | svn_check_prop_executable($m); |
486 | } elsif ($m->{chg} eq 'D') { | |
3397f9df EW |
487 | sys(qw(svn rm --force), $m->{file_b}); |
488 | } elsif ($m->{chg} eq 'R') { | |
489 | svn_ensure_parent_path( $m->{file_b} ); | |
490 | sys(qw(svn mv --force), $m->{file_a}, $m->{file_b}); | |
cf52b8f0 | 491 | apply_mod_line_blob($m); |
3397f9df | 492 | svn_check_prop_executable($m); |
3397f9df | 493 | } elsif ($m->{chg} eq 'M') { |
cf52b8f0 | 494 | apply_mod_line_blob($m); |
3397f9df EW |
495 | svn_check_prop_executable($m); |
496 | } elsif ($m->{chg} eq 'T') { | |
497 | sys(qw(svn rm --force),$m->{file_b}); | |
cf52b8f0 | 498 | apply_mod_line_blob($m); |
3397f9df | 499 | sys(qw(svn add --force), $m->{file_b}); |
cf52b8f0 | 500 | svn_check_prop_executable($m); |
3397f9df EW |
501 | } elsif ($m->{chg} eq 'A') { |
502 | svn_ensure_parent_path( $m->{file_b} ); | |
cf52b8f0 | 503 | apply_mod_line_blob($m); |
3397f9df | 504 | sys(qw(svn add --force), $m->{file_b}); |
cf52b8f0 | 505 | svn_check_prop_executable($m); |
3397f9df EW |
506 | } else { |
507 | croak "Invalid chg: $m->{chg}\n"; | |
508 | } | |
509 | } | |
cf52b8f0 EW |
510 | |
511 | assert_tree($treeish); | |
512 | if ($_rmdir) { # remove empty directories | |
513 | handle_rmdir($rm, $add); | |
514 | } | |
515 | assert_tree($treeish); | |
516 | return $mods; | |
517 | } | |
518 | ||
519 | # svn ls doesn't work with respect to the current working tree, but what's | |
520 | # in the repository. There's not even an option for it... *sigh* | |
521 | # (added files don't show up and removed files remain in the ls listing) | |
522 | sub svn_ls_current { | |
523 | my ($dir, $rm, $add) = @_; | |
524 | chomp(my @ls = safe_qx('svn','ls',$dir)); | |
525 | my @ret = (); | |
526 | foreach (@ls) { | |
527 | s#/$##; # trailing slashes are evil | |
528 | push @ret, $_ unless $rm->{$dir}->{$_}; | |
529 | } | |
530 | if (exists $add->{$dir}) { | |
531 | push @ret, keys %{$add->{$dir}}; | |
532 | } | |
533 | return \@ret; | |
534 | } | |
535 | ||
536 | sub handle_rmdir { | |
537 | my ($rm, $add) = @_; | |
538 | ||
539 | foreach my $dir (sort {length $b <=> length $a} keys %$rm) { | |
540 | my $ls = svn_ls_current($dir, $rm, $add); | |
541 | next if (scalar @$ls); | |
542 | sys(qw(svn rm --force),$dir); | |
543 | ||
544 | my $dn = dirname $dir; | |
545 | $rm->{ $dn }->{ basename $dir } = 1; | |
546 | $ls = svn_ls_current($dn, $rm, $add); | |
547 | while (scalar @$ls == 0 && $dn ne File::Spec->curdir) { | |
548 | sys(qw(svn rm --force),$dn); | |
549 | $dir = basename $dn; | |
550 | $dn = dirname $dn; | |
551 | $rm->{ $dn }->{ $dir } = 1; | |
552 | $ls = svn_ls_current($dn, $rm, $add); | |
3397f9df EW |
553 | } |
554 | } | |
555 | } | |
556 | ||
557 | sub svn_commit_tree { | |
558 | my ($svn_rev, $commit) = @_; | |
559 | my $commit_msg = "$GIT_DIR/$GIT_SVN/.svn-commit.tmp.$$"; | |
560 | open my $msg, '>', $commit_msg or croak $!; | |
561 | ||
562 | chomp(my $type = `git-cat-file -t $commit`); | |
563 | if ($type eq 'commit') { | |
564 | my $pid = open my $msg_fh, '-|'; | |
565 | defined $pid or croak $!; | |
566 | ||
567 | if ($pid == 0) { | |
568 | exec(qw(git-cat-file commit), $commit) or croak $!; | |
569 | } | |
570 | my $in_msg = 0; | |
571 | while (<$msg_fh>) { | |
572 | if (!$in_msg) { | |
573 | $in_msg = 1 if (/^\s*$/); | |
574 | } else { | |
575 | print $msg $_ or croak $!; | |
576 | } | |
577 | } | |
578 | close $msg_fh or croak $!; | |
579 | } | |
580 | close $msg or croak $!; | |
581 | ||
582 | if ($_edit || ($type eq 'tree')) { | |
583 | my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi'; | |
584 | system($editor, $commit_msg); | |
585 | } | |
586 | my @ci_output = safe_qx(qw(svn commit -F),$commit_msg); | |
587 | my ($committed) = grep(/^Committed revision \d+\./,@ci_output); | |
588 | unlink $commit_msg; | |
589 | defined $committed or croak | |
590 | "Commit output failed to parse committed revision!\n", | |
591 | join("\n",@ci_output),"\n"; | |
592 | my ($rev_committed) = ($committed =~ /^Committed revision (\d+)\./); | |
593 | ||
594 | # resync immediately | |
595 | my @svn_up = (qw(svn up), "-r$svn_rev"); | |
596 | push @svn_up, '--ignore-externals' unless $_no_ignore_ext; | |
597 | sys(@svn_up); | |
598 | return fetch("$rev_committed=$commit")->{revision}; | |
599 | } | |
600 | ||
3397f9df EW |
601 | sub svn_log_raw { |
602 | my (@log_args) = @_; | |
603 | my $pid = open my $log_fh,'-|'; | |
604 | defined $pid or croak $!; | |
605 | ||
606 | if ($pid == 0) { | |
607 | exec (qw(svn log), @log_args) or croak $! | |
608 | } | |
609 | ||
610 | my @svn_log; | |
ce6f3519 | 611 | my $state = 'sep'; |
3397f9df EW |
612 | while (<$log_fh>) { |
613 | chomp; | |
614 | if (/^\-{72}$/) { | |
ce6f3519 EW |
615 | if ($state eq 'msg') { |
616 | if ($svn_log[$#svn_log]->{lines}) { | |
617 | $svn_log[$#svn_log]->{msg} .= $_."\n"; | |
618 | unless(--$svn_log[$#svn_log]->{lines}) { | |
619 | $state = 'sep'; | |
620 | } | |
621 | } else { | |
622 | croak "Log parse error at: $_\n", | |
623 | $svn_log[$#svn_log]->{revision}, | |
624 | "\n"; | |
625 | } | |
626 | next; | |
627 | } | |
628 | if ($state ne 'sep') { | |
629 | croak "Log parse error at: $_\n", | |
630 | "state: $state\n", | |
631 | $svn_log[$#svn_log]->{revision}, | |
632 | "\n"; | |
633 | } | |
3397f9df EW |
634 | $state = 'rev'; |
635 | ||
636 | # if we have an empty log message, put something there: | |
637 | if (@svn_log) { | |
1c6bbbf3 | 638 | $svn_log[$#svn_log]->{msg} ||= "\n"; |
ce6f3519 | 639 | delete $svn_log[$#svn_log]->{lines}; |
3397f9df EW |
640 | } |
641 | next; | |
642 | } | |
643 | if ($state eq 'rev' && s/^r(\d+)\s*\|\s*//) { | |
644 | my $rev = $1; | |
ce6f3519 EW |
645 | my ($author, $date, $lines) = split(/\s*\|\s*/, $_, 3); |
646 | ($lines) = ($lines =~ /(\d+)/); | |
3397f9df EW |
647 | my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~ |
648 | /(\d{4})\-(\d\d)\-(\d\d)\s | |
649 | (\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x) | |
650 | or croak "Failed to parse date: $date\n"; | |
651 | my %log_msg = ( revision => $rev, | |
652 | date => "$tz $Y-$m-$d $H:$M:$S", | |
653 | author => $author, | |
ce6f3519 | 654 | lines => $lines, |
3397f9df | 655 | msg => '' ); |
1c6bbbf3 | 656 | push @svn_log, \%log_msg; |
3397f9df EW |
657 | $state = 'msg_start'; |
658 | next; | |
659 | } | |
660 | # skip the first blank line of the message: | |
661 | if ($state eq 'msg_start' && /^$/) { | |
662 | $state = 'msg'; | |
663 | } elsif ($state eq 'msg') { | |
ce6f3519 EW |
664 | if ($svn_log[$#svn_log]->{lines}) { |
665 | $svn_log[$#svn_log]->{msg} .= $_."\n"; | |
666 | unless (--$svn_log[$#svn_log]->{lines}) { | |
667 | $state = 'sep'; | |
668 | } | |
669 | } else { | |
670 | croak "Log parse error at: $_\n", | |
671 | $svn_log[$#svn_log]->{revision},"\n"; | |
672 | } | |
3397f9df EW |
673 | } |
674 | } | |
675 | close $log_fh or croak $?; | |
676 | return \@svn_log; | |
677 | } | |
678 | ||
679 | sub svn_info { | |
680 | my $url = shift || $SVN_URL; | |
681 | ||
682 | my $pid = open my $info_fh, '-|'; | |
683 | defined $pid or croak $!; | |
684 | ||
685 | if ($pid == 0) { | |
686 | exec(qw(svn info),$url) or croak $!; | |
687 | } | |
688 | ||
689 | my $ret = {}; | |
690 | # only single-lines seem to exist in svn info output | |
691 | while (<$info_fh>) { | |
692 | chomp $_; | |
693 | if (m#^([^:]+)\s*:\s*(\S*)$#) { | |
694 | $ret->{$1} = $2; | |
695 | push @{$ret->{-order}}, $1; | |
696 | } | |
697 | } | |
698 | close $info_fh or croak $!; | |
699 | return $ret; | |
700 | } | |
701 | ||
702 | sub sys { system(@_) == 0 or croak $? } | |
703 | ||
704 | sub git_addremove { | |
08703215 | 705 | system( "git-diff-files --name-only -z ". |
472ee9e3 | 706 | " | git-update-index --remove -z --stdin && ". |
08703215 | 707 | "git-ls-files -z --others ". |
3397f9df | 708 | "'--exclude-from=$GIT_DIR/$GIT_SVN/info/exclude'". |
472ee9e3 | 709 | " | git-update-index --add -z --stdin" |
08703215 | 710 | ) == 0 or croak $? |
3397f9df EW |
711 | } |
712 | ||
713 | sub s_to_file { | |
714 | my ($str, $file, $mode) = @_; | |
715 | open my $fd,'>',$file or croak $!; | |
716 | print $fd $str,"\n" or croak $!; | |
717 | close $fd or croak $!; | |
718 | chmod ($mode &~ umask, $file) if (defined $mode); | |
719 | } | |
720 | ||
721 | sub file_to_s { | |
722 | my $file = shift; | |
723 | open my $fd,'<',$file or croak "$!: file: $file\n"; | |
724 | local $/; | |
725 | my $ret = <$fd>; | |
726 | close $fd or croak $!; | |
727 | $ret =~ s/\s*$//s; | |
728 | return $ret; | |
729 | } | |
730 | ||
731 | sub assert_revision_unknown { | |
732 | my $revno = shift; | |
733 | if (-f "$REV_DIR/$revno") { | |
734 | croak "$REV_DIR/$revno already exists! ", | |
735 | "Why are we refetching it?"; | |
736 | } | |
737 | } | |
738 | ||
739 | sub assert_revision_eq_or_unknown { | |
740 | my ($revno, $commit) = @_; | |
741 | if (-f "$REV_DIR/$revno") { | |
742 | my $current = file_to_s("$REV_DIR/$revno"); | |
743 | if ($commit ne $current) { | |
744 | croak "$REV_DIR/$revno already exists!\n", | |
745 | "current: $current\nexpected: $commit\n"; | |
746 | } | |
747 | return; | |
748 | } | |
749 | } | |
750 | ||
751 | sub git_commit { | |
752 | my ($log_msg, @parents) = @_; | |
753 | assert_revision_unknown($log_msg->{revision}); | |
754 | my $out_fh = IO::File->new_tmpfile or croak $!; | |
755 | my $info = svn_info('.'); | |
756 | my $uuid = $info->{'Repository UUID'}; | |
757 | defined $uuid or croak "Unable to get Repository UUID\n"; | |
758 | ||
759 | # commit parents can be conditionally bound to a particular | |
760 | # svn revision via: "svn_revno=commit_sha1", filter them out here: | |
761 | my @exec_parents; | |
762 | foreach my $p (@parents) { | |
763 | next unless defined $p; | |
764 | if ($p =~ /^(\d+)=($sha1_short)$/o) { | |
765 | if ($1 == $log_msg->{revision}) { | |
766 | push @exec_parents, $2; | |
767 | } | |
768 | } else { | |
769 | push @exec_parents, $p if $p =~ /$sha1_short/o; | |
770 | } | |
771 | } | |
772 | ||
773 | my $pid = fork; | |
774 | defined $pid or croak $!; | |
775 | if ($pid == 0) { | |
776 | $ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX; | |
777 | git_addremove(); | |
778 | chomp(my $tree = `git-write-tree`); | |
779 | croak if $?; | |
780 | my $msg_fh = IO::File->new_tmpfile or croak $!; | |
781 | print $msg_fh $log_msg->{msg}, "\ngit-svn-id: ", | |
782 | "$SVN_URL\@$log_msg->{revision}", | |
783 | " $uuid\n" or croak $!; | |
784 | $msg_fh->flush == 0 or croak $!; | |
785 | seek $msg_fh, 0, 0 or croak $!; | |
786 | ||
787 | $ENV{GIT_AUTHOR_NAME} = $ENV{GIT_COMMITTER_NAME} = | |
788 | $log_msg->{author}; | |
789 | $ENV{GIT_AUTHOR_EMAIL} = $ENV{GIT_COMMITTER_EMAIL} = | |
790 | $log_msg->{author}."\@$uuid"; | |
791 | $ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} = | |
792 | $log_msg->{date}; | |
793 | my @exec = ('git-commit-tree',$tree); | |
794 | push @exec, '-p', $_ foreach @exec_parents; | |
795 | open STDIN, '<&', $msg_fh or croak $!; | |
796 | open STDOUT, '>&', $out_fh or croak $!; | |
797 | exec @exec or croak $!; | |
798 | } | |
799 | waitpid($pid,0); | |
800 | croak if $?; | |
801 | ||
802 | $out_fh->flush == 0 or croak $!; | |
803 | seek $out_fh, 0, 0 or croak $!; | |
804 | chomp(my $commit = do { local $/; <$out_fh> }); | |
805 | if ($commit !~ /^$sha1$/o) { | |
806 | croak "Failed to commit, invalid sha1: $commit\n"; | |
807 | } | |
808 | my @update_ref = ('git-update-ref',"refs/heads/$GIT_SVN-HEAD",$commit); | |
809 | if (my $primary_parent = shift @exec_parents) { | |
810 | push @update_ref, $primary_parent; | |
811 | } | |
812 | sys(@update_ref); | |
813 | sys('git-update-ref',"$GIT_SVN/revs/$log_msg->{revision}",$commit); | |
814 | print "r$log_msg->{revision} = $commit\n"; | |
815 | return $commit; | |
816 | } | |
817 | ||
cf52b8f0 EW |
818 | sub apply_mod_line_blob { |
819 | my $m = shift; | |
820 | if ($m->{mode_b} =~ /^120/) { | |
821 | blob_to_symlink($m->{sha1_b}, $m->{file_b}); | |
822 | } else { | |
823 | blob_to_file($m->{sha1_b}, $m->{file_b}); | |
824 | } | |
825 | } | |
826 | ||
3397f9df EW |
827 | sub blob_to_symlink { |
828 | my ($blob, $link) = @_; | |
829 | defined $link or croak "\$link not defined!\n"; | |
830 | croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o; | |
cf52b8f0 EW |
831 | if (-l $link || -f _) { |
832 | unlink $link or croak $!; | |
833 | } | |
834 | ||
3397f9df EW |
835 | my $dest = `git-cat-file blob $blob`; # no newline, so no chomp |
836 | symlink $dest, $link or croak $!; | |
837 | } | |
838 | ||
839 | sub blob_to_file { | |
840 | my ($blob, $file) = @_; | |
841 | defined $file or croak "\$file not defined!\n"; | |
842 | croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o; | |
cf52b8f0 EW |
843 | if (-l $file || -f _) { |
844 | unlink $file or croak $!; | |
845 | } | |
846 | ||
3397f9df EW |
847 | open my $blob_fh, '>', $file or croak "$!: $file\n"; |
848 | my $pid = fork; | |
849 | defined $pid or croak $!; | |
850 | ||
851 | if ($pid == 0) { | |
852 | open STDOUT, '>&', $blob_fh or croak $!; | |
853 | exec('git-cat-file','blob',$blob); | |
854 | } | |
855 | waitpid $pid, 0; | |
856 | croak $? if $?; | |
857 | ||
858 | close $blob_fh or croak $!; | |
859 | } | |
860 | ||
861 | sub safe_qx { | |
862 | my $pid = open my $child, '-|'; | |
863 | defined $pid or croak $!; | |
864 | if ($pid == 0) { | |
865 | exec(@_) or croak $?; | |
866 | } | |
867 | my @ret = (<$child>); | |
868 | close $child or croak $?; | |
869 | die $? if $?; # just in case close didn't error out | |
870 | return wantarray ? @ret : join('',@ret); | |
871 | } | |
872 | ||
873 | sub svn_check_ignore_externals { | |
874 | return if $_no_ignore_ext; | |
875 | unless (grep /ignore-externals/,(safe_qx(qw(svn co -h)))) { | |
876 | print STDERR "W: Installed svn version does not support ", | |
877 | "--ignore-externals\n"; | |
878 | $_no_ignore_ext = 1; | |
879 | } | |
880 | } | |
881 | __END__ | |
882 | ||
883 | Data structures: | |
884 | ||
885 | @svn_log = array of log_msg hashes | |
886 | ||
887 | $log_msg hash | |
888 | { | |
889 | msg => 'whitespace-formatted log entry | |
890 | ', # trailing newline is preserved | |
891 | revision => '8', # integer | |
892 | date => '2004-02-24T17:01:44.108345Z', # commit date | |
893 | author => 'committer name' | |
894 | }; | |
895 | ||
896 | ||
897 | @mods = array of diff-index line hashes, each element represents one line | |
898 | of diff-index output | |
899 | ||
900 | diff-index line ($m hash) | |
901 | { | |
902 | mode_a => first column of diff-index output, no leading ':', | |
903 | mode_b => second column of diff-index output, | |
904 | sha1_b => sha1sum of the final blob, | |
905 | chg => change type [MCRAD], | |
906 | file_a => original file name of a file (iff chg is 'C' or 'R') | |
907 | file_b => new/current file name of a file (any chg) | |
908 | } | |
909 | ; |