]>
Commit | Line | Data |
---|---|---|
d3968363 ML |
1 | #!/usr/bin/perl -w |
2 | # | |
3 | # This tool is copyright (c) 2005, Martin Langhoff. | |
4 | # It is released under the Gnu Public License, version 2. | |
5 | # | |
6 | # The basic idea is to walk the output of tla abrowse, | |
7 | # fetch the changesets and apply them. | |
8 | # | |
9 | =head1 Invocation | |
10 | ||
215a7ad1 | 11 | git-archimport -i <archive>/<branch> [<archive>/<branch>] |
d3968363 ML |
12 | [ <archive>/<branch> ] |
13 | ||
14 | The script expects you to provide the key roots where it can start the | |
15 | import from an 'initial import' or 'tag' type of Arch commit. It will | |
16 | then follow all the branching and tagging within the provided roots. | |
17 | ||
18 | It will die if it sees branches that have different roots. | |
19 | ||
20 | =head2 TODO | |
21 | ||
22 | - keep track of merged patches, and mark a git merge when it happens | |
23 | - smarter rules to parse the archive history "up" and "down" | |
24 | - be able to continue an import where we left off | |
25 | - audit shell-escaping of filenames | |
26 | ||
27 | =head1 Devel tricks | |
28 | ||
29 | Add print in front of the shell commands invoked via backticks. | |
30 | ||
31 | =cut | |
32 | ||
33 | use strict; | |
34 | use warnings; | |
35 | use Getopt::Std; | |
36 | use File::Spec; | |
37 | use File::Temp qw(tempfile); | |
38 | use File::Path qw(mkpath); | |
39 | use File::Basename qw(basename dirname); | |
40 | use String::ShellQuote; | |
41 | use Time::Local; | |
42 | use IO::Socket; | |
43 | use IO::Pipe; | |
44 | use POSIX qw(strftime dup2); | |
45 | use Data::Dumper qw/ Dumper /; | |
46 | use IPC::Open2; | |
47 | ||
48 | $SIG{'PIPE'}="IGNORE"; | |
49 | $ENV{'TZ'}="UTC"; | |
50 | ||
51 | our($opt_h,$opt_v, $opt_T, | |
3292ae47 | 52 | $opt_C,$opt_t); |
d3968363 ML |
53 | |
54 | sub usage() { | |
55 | print STDERR <<END; | |
56 | Usage: ${\basename $0} # fetch/update GIT from Arch | |
3292ae47 | 57 | [ -h ] [ -v ] [ -T ] |
d3968363 ML |
58 | [ -C GIT_repository ] [ -t tempdir ] |
59 | repository/arch-branch [ repository/arch-branch] ... | |
60 | END | |
61 | exit(1); | |
62 | } | |
63 | ||
64 | getopts("hviC:t:") or usage(); | |
65 | usage if $opt_h; | |
66 | ||
67 | @ARGV >= 1 or usage(); | |
68 | my @arch_roots = @ARGV; | |
69 | ||
70 | my $tmp = $opt_t; | |
71 | $tmp ||= '/tmp'; | |
72 | $tmp .= '/git-archimport/'; | |
73 | ||
74 | my $git_tree = $opt_C; | |
75 | $git_tree ||= "."; | |
76 | ||
77 | ||
78 | my @psets = (); # the collection | |
79 | ||
80 | foreach my $root (@arch_roots) { | |
81 | my ($arepo, $abranch) = split(m!/!, $root); | |
82 | open ABROWSE, "tla abrowse -f -A $arepo --desc --merges $abranch |" | |
83 | or die "Problems with tla abrowse: $!"; | |
84 | ||
85 | my %ps = (); # the current one | |
86 | my $mode = ''; | |
87 | my $lastseen = ''; | |
88 | ||
89 | while (<ABROWSE>) { | |
90 | chomp; | |
91 | ||
92 | # first record padded w 8 spaces | |
93 | if (s/^\s{8}\b//) { | |
94 | ||
95 | # store the record we just captured | |
96 | if (%ps) { | |
97 | my %temp = %ps; # break references | |
98 | push (@psets, \%temp); | |
99 | %ps = (); | |
100 | } | |
101 | ||
102 | my ($id, $type) = split(m/\s{3}/, $_); | |
103 | $ps{id} = $id; | |
104 | $ps{repo} = $arepo; | |
105 | ||
106 | # deal with types | |
107 | if ($type =~ m/^\(simple changeset\)/) { | |
108 | $ps{type} = 's'; | |
109 | } elsif ($type eq '(initial import)') { | |
110 | $ps{type} = 'i'; | |
111 | } elsif ($type =~ m/^\(tag revision of (.+)\)/) { | |
112 | $ps{type} = 't'; | |
113 | $ps{tag} = $1; | |
114 | } else { | |
115 | warn "Unknown type $type"; | |
116 | } | |
117 | $lastseen = 'id'; | |
118 | } | |
119 | ||
120 | if (s/^\s{10}//) { | |
121 | # 10 leading spaces or more | |
122 | # indicate commit metadata | |
123 | ||
124 | # date & author | |
125 | if ($lastseen eq 'id' && m/^\d{4}-\d{2}-\d{2}/) { | |
126 | ||
127 | my ($date, $authoremail) = split(m/\s{2,}/, $_); | |
128 | $ps{date} = $date; | |
129 | $ps{date} =~ s/\bGMT$//; # strip off trailign GMT | |
130 | if ($ps{date} =~ m/\b\w+$/) { | |
131 | warn 'Arch dates not in GMT?! - imported dates will be wrong'; | |
132 | } | |
133 | ||
134 | $authoremail =~ m/^(.+)\s(\S+)$/; | |
135 | $ps{author} = $1; | |
136 | $ps{email} = $2; | |
137 | ||
138 | $lastseen = 'date'; | |
139 | ||
140 | } elsif ($lastseen eq 'date') { | |
141 | # the only hint is position | |
142 | # subject is after date | |
143 | $ps{subj} = $_; | |
144 | $lastseen = 'subj'; | |
145 | ||
146 | } elsif ($lastseen eq 'subj' && $_ eq 'merges in:') { | |
147 | $ps{merges} = []; | |
148 | $lastseen = 'merges'; | |
149 | ||
150 | } elsif ($lastseen eq 'merges' && s/^\s{2}//) { | |
151 | push (@{$ps{merges}}, $_); | |
152 | } else { | |
153 | warn 'more metadata after merges!?'; | |
154 | } | |
155 | ||
156 | } | |
157 | } | |
158 | ||
159 | if (%ps) { | |
160 | my %temp = %ps; # break references | |
161 | push (@psets, \%temp); | |
162 | %ps = (); | |
163 | } | |
164 | close ABROWSE; | |
165 | } # end foreach $root | |
166 | ||
167 | ## Order patches by time | |
168 | @psets = sort {$a->{date}.$b->{id} cmp $b->{date}.$b->{id}} @psets; | |
169 | ||
170 | #print Dumper \@psets; | |
171 | ||
172 | ## | |
173 | ## TODO cleanup irrelevant patches | |
174 | ## and put an initial import | |
175 | ## or a full tag | |
3292ae47 ML |
176 | my $import = 0; |
177 | unless (-d '.git') { # initial import | |
d3968363 ML |
178 | if ($psets[0]{type} eq 'i' || $psets[0]{type} eq 't') { |
179 | print "Starting import from $psets[0]{id}\n"; | |
3292ae47 ML |
180 | `git-init-db`; |
181 | die $! if $?; | |
182 | $import = 1; | |
d3968363 ML |
183 | } else { |
184 | die "Need to start from an import or a tag -- cannot use $psets[0]{id}"; | |
185 | } | |
d3968363 ML |
186 | } |
187 | ||
3292ae47 | 188 | # process patchsets |
d3968363 ML |
189 | foreach my $ps (@psets) { |
190 | ||
191 | $ps->{branch} = branchname($ps->{id}); | |
192 | ||
193 | # | |
194 | # ensure we have a clean state | |
195 | # | |
196 | if (`git diff-files`) { | |
197 | die "Unclean tree when about to process $ps->{id} " . | |
198 | " - did we fail to commit cleanly before?"; | |
199 | } | |
200 | die $! if $?; | |
201 | ||
3292ae47 ML |
202 | # |
203 | # skip commits already in repo | |
204 | # | |
205 | if (ptag($ps->{id})) { | |
206 | $opt_v && print "Skipping already imported: $ps->{id}\n"; | |
207 | next; | |
208 | } | |
209 | ||
d3968363 ML |
210 | # |
211 | # create the branch if needed | |
212 | # | |
3292ae47 ML |
213 | if ($ps->{type} eq 'i' && !$import) { |
214 | die "Should not have more than one 'Initial import' per GIT import: $ps->{id}"; | |
d3968363 ML |
215 | } |
216 | ||
3292ae47 | 217 | unless ($import) { # skip for import |
d3968363 ML |
218 | if ( -e ".git/refs/heads/$ps->{branch}") { |
219 | # we know about this branch | |
220 | `git checkout $ps->{branch}`; | |
221 | } else { | |
222 | # new branch! we need to verify a few things | |
223 | die "Branch on a non-tag!" unless $ps->{type} eq 't'; | |
224 | my $branchpoint = ptag($ps->{tag}); | |
225 | die "Tagging from unknown id unsupported: $ps->{tag}" | |
226 | unless $branchpoint; | |
227 | ||
228 | # find where we are supposed to branch from | |
229 | `git checkout -b $ps->{branch} $branchpoint`; | |
52586ecb ML |
230 | |
231 | # If we trust Arch with the fact that this is just | |
232 | # a tag, and it does not affect the state of the tree | |
233 | # then we just tag and move on | |
234 | tag($ps->{id}, $branchpoint); | |
235 | ptag($ps->{id}, $branchpoint); | |
236 | print " * Tagged $ps->{id} at $branchpoint\n"; | |
237 | next; | |
d3968363 ML |
238 | } |
239 | die $! if $?; | |
240 | } | |
241 | ||
d3968363 ML |
242 | # |
243 | # Apply the import/changeset/merge into the working tree | |
244 | # | |
245 | if ($ps->{type} eq 'i' || $ps->{type} eq 't') { | |
d3968363 | 246 | apply_import($ps) or die $!; |
3292ae47 | 247 | $import=0; |
d3968363 ML |
248 | } elsif ($ps->{type} eq 's') { |
249 | apply_cset($ps); | |
250 | } | |
251 | ||
252 | # | |
253 | # prepare update git's index, based on what arch knows | |
254 | # about the pset, resolve parents, etc | |
255 | # | |
256 | my $tree; | |
257 | ||
258 | my $commitlog = `tla cat-archive-log -A $ps->{repo} $ps->{id}`; | |
259 | die "Error in cat-archive-log: $!" if $?; | |
260 | ||
261 | # parselog will git-add/rm files | |
262 | # and generally prepare things for the commit | |
263 | # NOTE: parselog will shell-quote filenames! | |
264 | my ($sum, $msg, $add, $del, $mod, $ren) = parselog($commitlog); | |
265 | my $logmessage = "$sum\n$msg"; | |
266 | ||
267 | ||
268 | # imports don't give us good info | |
269 | # on added files. Shame on them | |
270 | if ($ps->{type} eq 'i' || $ps->{type} eq 't') { | |
215a7ad1 JH |
271 | `find . -type f -print0 | grep -zv '^./.git' | xargs -0 -l100 git-update-index --add`; |
272 | `git-ls-files --deleted -z | xargs --no-run-if-empty -0 -l100 git-update-index --remove`; | |
d3968363 ML |
273 | } |
274 | ||
275 | if (@$add) { | |
276 | while (@$add) { | |
277 | my @slice = splice(@$add, 0, 100); | |
278 | my $slice = join(' ', @slice); | |
215a7ad1 JH |
279 | `git-update-index --add $slice`; |
280 | die "Error in git-update-index --add: $!" if $?; | |
d3968363 ML |
281 | } |
282 | } | |
283 | if (@$del) { | |
284 | foreach my $file (@$del) { | |
285 | unlink $file or die "Problems deleting $file : $!"; | |
286 | } | |
287 | while (@$del) { | |
288 | my @slice = splice(@$del, 0, 100); | |
289 | my $slice = join(' ', @slice); | |
215a7ad1 JH |
290 | `git-update-index --remove $slice`; |
291 | die "Error in git-update-index --remove: $!" if $?; | |
d3968363 ML |
292 | } |
293 | } | |
294 | if (@$ren) { # renamed | |
295 | if (@$ren % 2) { | |
296 | die "Odd number of entries in rename!?"; | |
297 | } | |
298 | ; | |
299 | while (@$ren) { | |
300 | my $from = pop @$ren; | |
301 | my $to = pop @$ren; | |
302 | ||
303 | unless (-d dirname($to)) { | |
304 | mkpath(dirname($to)); # will die on err | |
305 | } | |
306 | #print "moving $from $to"; | |
307 | `mv $from $to`; | |
308 | die "Error renaming $from $to : $!" if $?; | |
215a7ad1 JH |
309 | `git-update-index --remove $from`; |
310 | die "Error in git-update-index --remove: $!" if $?; | |
311 | `git-update-index --add $to`; | |
312 | die "Error in git-update-index --add: $!" if $?; | |
d3968363 ML |
313 | } |
314 | ||
315 | } | |
316 | if (@$mod) { # must be _after_ renames | |
317 | while (@$mod) { | |
318 | my @slice = splice(@$mod, 0, 100); | |
319 | my $slice = join(' ', @slice); | |
215a7ad1 JH |
320 | `git-update-index $slice`; |
321 | die "Error in git-update-index: $!" if $?; | |
d3968363 ML |
322 | } |
323 | } | |
324 | ||
215a7ad1 | 325 | # warn "errors when running git-update-index! $!"; |
d3968363 ML |
326 | $tree = `git-write-tree`; |
327 | die "cannot write tree $!" if $?; | |
328 | chomp $tree; | |
329 | ||
330 | ||
331 | # | |
332 | # Who's your daddy? | |
333 | # | |
334 | my @par; | |
335 | if ( -e ".git/refs/heads/$ps->{branch}") { | |
336 | if (open HEAD, "<.git/refs/heads/$ps->{branch}") { | |
337 | my $p = <HEAD>; | |
338 | close HEAD; | |
339 | chomp $p; | |
340 | push @par, '-p', $p; | |
341 | } else { | |
342 | if ($ps->{type} eq 's') { | |
343 | warn "Could not find the right head for the branch $ps->{branch}"; | |
344 | } | |
345 | } | |
346 | } | |
347 | ||
348 | my $par = join (' ', @par); | |
349 | ||
350 | # | |
351 | # Commit, tag and clean state | |
352 | # | |
353 | $ENV{TZ} = 'GMT'; | |
354 | $ENV{GIT_AUTHOR_NAME} = $ps->{author}; | |
355 | $ENV{GIT_AUTHOR_EMAIL} = $ps->{email}; | |
356 | $ENV{GIT_AUTHOR_DATE} = $ps->{date}; | |
357 | $ENV{GIT_COMMITTER_NAME} = $ps->{author}; | |
358 | $ENV{GIT_COMMITTER_EMAIL} = $ps->{email}; | |
359 | $ENV{GIT_COMMITTER_DATE} = $ps->{date}; | |
360 | ||
361 | my ($pid, $commit_rh, $commit_wh); | |
362 | $commit_rh = 'commit_rh'; | |
363 | $commit_wh = 'commit_wh'; | |
364 | ||
365 | $pid = open2(*READER, *WRITER, "git-commit-tree $tree $par") | |
366 | or die $!; | |
367 | print WRITER $logmessage; # write | |
368 | close WRITER; | |
369 | my $commitid = <READER>; # read | |
370 | chomp $commitid; | |
371 | close READER; | |
372 | waitpid $pid,0; # close; | |
373 | ||
374 | if (length $commitid != 40) { | |
375 | die "Something went wrong with the commit! $! $commitid"; | |
376 | } | |
377 | # | |
378 | # Update the branch | |
379 | # | |
380 | open HEAD, ">.git/refs/heads/$ps->{branch}"; | |
381 | print HEAD $commitid; | |
382 | close HEAD; | |
383 | unlink ('.git/HEAD'); | |
384 | symlink("refs/heads/$ps->{branch}",".git/HEAD"); | |
385 | ||
386 | # tag accordingly | |
387 | ptag($ps->{id}, $commitid); # private tag | |
388 | if ($opt_T || $ps->{type} eq 't' || $ps->{type} eq 'i') { | |
389 | tag($ps->{id}, $commitid); | |
390 | } | |
391 | print " * Committed $ps->{id}\n"; | |
392 | print " + tree $tree\n"; | |
393 | print " + commit $commitid\n"; | |
394 | # print " + commit date is $ps->{date} \n"; | |
395 | } | |
396 | ||
397 | sub branchname { | |
398 | my $id = shift; | |
399 | $id =~ s#^.+?/##; | |
400 | my @parts = split(m/--/, $id); | |
401 | return join('--', @parts[0..1]); | |
402 | } | |
403 | ||
404 | sub apply_import { | |
405 | my $ps = shift; | |
406 | my $bname = branchname($ps->{id}); | |
407 | ||
408 | `mkdir -p $tmp`; | |
409 | ||
410 | `tla get -s --no-pristine -A $ps->{repo} $ps->{id} $tmp/import`; | |
411 | die "Cannot get import: $!" if $?; | |
412 | `rsync -v --archive --delete --exclude '.git' --exclude '.arch-ids' --exclude '{arch}' $tmp/import/* ./`; | |
413 | die "Cannot rsync import:$!" if $?; | |
414 | ||
415 | `rm -fr $tmp/import`; | |
416 | die "Cannot remove tempdir: $!" if $?; | |
417 | ||
418 | ||
419 | return 1; | |
420 | } | |
421 | ||
422 | sub apply_cset { | |
423 | my $ps = shift; | |
424 | ||
425 | `mkdir -p $tmp`; | |
426 | ||
427 | # get the changeset | |
428 | `tla get-changeset -A $ps->{repo} $ps->{id} $tmp/changeset`; | |
429 | die "Cannot get changeset: $!" if $?; | |
430 | ||
431 | # apply patches | |
432 | if (`find $tmp/changeset/patches -type f -name '*.patch'`) { | |
433 | # this can be sped up considerably by doing | |
434 | # (find | xargs cat) | patch | |
435 | # but that cna get mucked up by patches | |
436 | # with missing trailing newlines or the standard | |
437 | # 'missing newline' flag in the patch - possibly | |
438 | # produced with an old/buggy diff. | |
439 | # slow and safe, we invoke patch once per patchfile | |
440 | `find $tmp/changeset/patches -type f -name '*.patch' -print0 | grep -zv '{arch}' | xargs -iFILE -0 --no-run-if-empty patch -p1 --forward -iFILE`; | |
441 | die "Problem applying patches! $!" if $?; | |
442 | } | |
443 | ||
444 | # apply changed binary files | |
445 | if (my @modified = `find $tmp/changeset/patches -type f -name '*.modified'`) { | |
446 | foreach my $mod (@modified) { | |
447 | chomp $mod; | |
448 | my $orig = $mod; | |
449 | $orig =~ s/\.modified$//; # lazy | |
450 | $orig =~ s!^\Q$tmp\E/changeset/patches/!!; | |
451 | #print "rsync -p '$mod' '$orig'"; | |
452 | `rsync -p $mod ./$orig`; | |
453 | die "Problem applying binary changes! $!" if $?; | |
454 | } | |
455 | } | |
456 | ||
457 | # bring in new files | |
458 | `rsync --archive --exclude '.git' --exclude '.arch-ids' --exclude '{arch}' $tmp/changeset/new-files-archive/* ./`; | |
459 | ||
460 | # deleted files are hinted from the commitlog processing | |
461 | ||
462 | `rm -fr $tmp/changeset`; | |
463 | } | |
464 | ||
465 | ||
466 | # =for reference | |
467 | # A log entry looks like | |
468 | # Revision: moodle-org--moodle--1.3.3--patch-15 | |
469 | # Archive: arch-eduforge@catalyst.net.nz--2004 | |
470 | # Creator: Penny Leach <penny@catalyst.net.nz> | |
471 | # Date: Wed May 25 14:15:34 NZST 2005 | |
472 | # Standard-date: 2005-05-25 02:15:34 GMT | |
473 | # New-files: lang/de/.arch-ids/block_glossary_random.php.id | |
474 | # lang/de/.arch-ids/block_html.php.id | |
475 | # New-directories: lang/de/help/questionnaire | |
476 | # lang/de/help/questionnaire/.arch-ids | |
477 | # Renamed-files: .arch-ids/db_sears.sql.id db/.arch-ids/db_sears.sql.id | |
478 | # db_sears.sql db/db_sears.sql | |
479 | # Removed-files: lang/be/docs/.arch-ids/release.html.id | |
480 | # lang/be/docs/.arch-ids/releaseold.html.id | |
481 | # Modified-files: admin/cron.php admin/delete.php | |
482 | # admin/editor.html backup/lib.php backup/restore.php | |
483 | # New-patches: arch-eduforge@catalyst.net.nz--2004/moodle-org--moodle--1.3.3--patch-15 | |
484 | # Summary: Updating to latest from MOODLE_14_STABLE (1.4.5+) | |
485 | # Keywords: | |
486 | # | |
487 | # Updating yadda tadda tadda madda | |
488 | sub parselog { | |
489 | my $log = shift; | |
490 | #print $log; | |
491 | ||
492 | my (@add, @del, @mod, @ren, @kw, $sum, $msg ); | |
493 | ||
494 | if ($log =~ m/(?:\n|^)New-files:(.*?)(?=\n\w)/s ) { | |
495 | my $files = $1; | |
496 | @add = split(m/\s+/s, $files); | |
497 | } | |
498 | ||
499 | if ($log =~ m/(?:\n|^)Removed-files:(.*?)(?=\n\w)/s ) { | |
500 | my $files = $1; | |
501 | @del = split(m/\s+/s, $files); | |
502 | } | |
503 | ||
504 | if ($log =~ m/(?:\n|^)Modified-files:(.*?)(?=\n\w)/s ) { | |
505 | my $files = $1; | |
506 | @mod = split(m/\s+/s, $files); | |
507 | } | |
508 | ||
509 | if ($log =~ m/(?:\n|^)Renamed-files:(.*?)(?=\n\w)/s ) { | |
510 | my $files = $1; | |
511 | @ren = split(m/\s+/s, $files); | |
512 | } | |
513 | ||
514 | $sum =''; | |
515 | if ($log =~ m/^Summary:(.+?)$/m ) { | |
516 | $sum = $1; | |
517 | $sum =~ s/^\s+//; | |
518 | $sum =~ s/\s+$//; | |
519 | } | |
520 | ||
521 | $msg = ''; | |
522 | if ($log =~ m/\n\n(.+)$/s) { | |
523 | $msg = $1; | |
524 | $msg =~ s/^\s+//; | |
525 | $msg =~ s/\s+$//; | |
526 | } | |
527 | ||
528 | ||
529 | # cleanup the arrays | |
530 | foreach my $ref ( (\@add, \@del, \@mod, \@ren) ) { | |
531 | my @tmp = (); | |
532 | while (my $t = pop @$ref) { | |
533 | next unless length ($t); | |
534 | next if $t =~ m!\{arch\}/!; | |
535 | next if $t =~ m!\.arch-ids/!; | |
536 | next if $t =~ m!\.arch-inventory$!; | |
537 | push (@tmp, shell_quote($t)); | |
538 | } | |
539 | @$ref = @tmp; | |
540 | } | |
541 | ||
542 | #print Dumper [$sum, $msg, \@add, \@del, \@mod, \@ren]; | |
543 | return ($sum, $msg, \@add, \@del, \@mod, \@ren); | |
544 | } | |
545 | ||
546 | # write/read a tag | |
547 | sub tag { | |
548 | my ($tag, $commit) = @_; | |
549 | $tag =~ s|/|--|g; | |
550 | $tag = shell_quote($tag); | |
551 | ||
552 | if ($commit) { | |
553 | open(C,">.git/refs/tags/$tag") | |
554 | or die "Cannot create tag $tag: $!\n"; | |
555 | print C "$commit\n" | |
556 | or die "Cannot write tag $tag: $!\n"; | |
557 | close(C) | |
558 | or die "Cannot write tag $tag: $!\n"; | |
559 | print "Created tag '$tag' on '$commit'\n" if $opt_v; | |
560 | } else { # read | |
561 | open(C,"<.git/refs/tags/$tag") | |
562 | or die "Cannot read tag $tag: $!\n"; | |
563 | $commit = <C>; | |
564 | chomp $commit; | |
565 | die "Error reading tag $tag: $!\n" unless length $commit == 40; | |
566 | close(C) | |
567 | or die "Cannot read tag $tag: $!\n"; | |
568 | return $commit; | |
569 | } | |
570 | } | |
571 | ||
572 | # write/read a private tag | |
573 | # reads fail softly if the tag isn't there | |
574 | sub ptag { | |
575 | my ($tag, $commit) = @_; | |
576 | $tag =~ s|/|--|g; | |
577 | $tag = shell_quote($tag); | |
578 | ||
579 | unless (-d '.git/archimport/tags') { | |
580 | mkpath('.git/archimport/tags'); | |
581 | } | |
582 | ||
583 | if ($commit) { # write | |
584 | open(C,">.git/archimport/tags/$tag") | |
585 | or die "Cannot create tag $tag: $!\n"; | |
586 | print C "$commit\n" | |
587 | or die "Cannot write tag $tag: $!\n"; | |
588 | close(C) | |
589 | or die "Cannot write tag $tag: $!\n"; | |
590 | } else { # read | |
591 | # if the tag isn't there, return 0 | |
592 | unless ( -s ".git/archimport/tags/$tag") { | |
d3968363 ML |
593 | return 0; |
594 | } | |
595 | open(C,"<.git/archimport/tags/$tag") | |
596 | or die "Cannot read tag $tag: $!\n"; | |
597 | $commit = <C>; | |
598 | chomp $commit; | |
599 | die "Error reading tag $tag: $!\n" unless length $commit == 40; | |
600 | close(C) | |
601 | or die "Cannot read tag $tag: $!\n"; | |
602 | return $commit; | |
603 | } | |
604 | } |