3 # Integration between git and Debian-style archives
5 # Copyright (C)2013 Ian Jackson
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
25 use Dpkg::Control::Hash;
29 open DEBUG, ">&STDERR" or die $!;
31 our $mirror = 'http://mirror.relativity.greenend.org.uk/mirror/debian-ftp/';
38 our $aliothname = 'iwj@git.debian.org';
39 our $aliothpath = '/git/dgit-test';
40 our $alioth_git = "git+ssh://$aliothname/$aliothpath";
41 our $alioth_sshtestbodge = [$aliothname,$aliothpath];
43 our (@dget_opts) = qw(-u);
47 our $remotename = 'dgit';
48 our $ourdscfield = 'Vcs-git-master';
50 sub uploadbranch () { return "dgit/$suite"; }
51 sub lref ($) { return "refs/heads/$_[0]"; }
52 sub rref ($) { return "refs/remotes/$remotename/$_[0]"; }
53 sub debiantag ($) { return "debian/$_[0]"; }
59 $ua = LWP::UserAgent->new();
62 print DEBUG "fetching @_...\n";
63 my $r = $ua->get(@_) or die $!;
64 die "$_[0]: ".$r->status_line."; failed.\n" unless $r->is_success;
65 return $r->decoded_content();
68 our ($dscdata,$dscurl,$dsc);
72 die "@_ $! $?" if system @_;
76 open P, "-|", @_ or die $!;
79 { local $/ = undef; $d = <P>; }
81 close P or die "@_ $? $!";
87 my $c = Dpkg::Control::Hash->new();
88 $c->load(@_) or return undef;
93 my $c = Dpkg::Control::Hash->new();
94 my $p = new IO::Handle;
95 open $p, '-|', qw(dpkg-parsechangelog) or die $!;
97 $?=0; $!=0; close $p or die "$! $?";
101 sub get_archive_dsc () {
102 my $rmad = cmdoutput qw(rmadison -asource),"-s$suite",$package;
103 $rmad =~ m/^ \s*( [^ \t|]+ )\s* \|
104 \s*( [^ \t|]+ )\s* \|
105 \s*( [^ \t|]+ )\s* \|
106 \s*( [^ \t|]+ )\s* /x or die "$rmad $?";
107 $1 eq $package or die "$rmad $package ?";
109 $3 eq $suite or die "$rmad $suite ?";
110 $4 eq 'source' or die "$rmad ?";
111 # fixme it does not show us the component ?
112 my $prefix = substr($package, 0, $package =~ m/^l/ ? 4 : 1);
113 $dscurl = "$mirror/pool/main/$prefix/$package/${package}_$vsn.dsc";
114 #print DEBUG Dumper($pdodata, $&, $dscurl);
115 $dscdata = url_get($dscurl);
116 my $dscfh = new IO::File \$dscdata, '<' or die $!;
117 #print DEBUG Dumper($dscdata, $dscfh);
118 $dsc = Dpkg::Control::Hash->new(allow_pgp=>1);
119 $dsc->parse($dscfh, 'dsc') or die "parsing of $dscurl failed\n";
120 #print DEBUG Dumper($dsc);
121 my $fmt = $dsc->{Format};
122 die "unsupported format $fmt, sorry\n" unless $fmt eq '1.0';
125 sub check_for_git () {
128 "ssh $alioth_sshtestbodge->[0] '".
129 " set -e; cd /git/dgit-test;".
130 " if test -d $package.git; then echo 1; else echo 0; fi".
132 #print DEBUG "$cmd\n";
133 open P, "$cmd |" or die $!;
135 my $r = <P>; close P;
136 #print STDERR ">$r<\n";
137 die "$r $! $?" unless $r =~ m/^[01]$/;
141 our ($dsc_hash,$upload_hash);
143 our $ud = '.git/dgit/unpack';
151 sub mktree_in_ud_from_only_subdir () {
152 # changes into the subdir
155 $dirs[0] =~ m#^([^/]+)/\.$# or die;
157 chdir $dir or die "$dir $!";
159 die $! unless $!==&ENOENT;
160 runcmd qw(git init -q);
161 rmtree('.git/objects');
162 symlink '../../../../objects','.git/objects' or die $!;
163 runcmd qw(git add -Af);
164 my $tree = cmdoutput qw(git write-tree);
165 chomp $tree; $tree =~ m/^\w+$/ or die "$tree ?";
171 m/^\w+ \d+ (\S+)$/ or die "$_ ?";
173 } grep m/\S/, split /\n/, ($dsc->{'Checksums-Sha256'} || $dsc->{Files});
176 sub is_orig_file ($) {
178 m/\.orig\.tar\.\w+$/;
181 sub generate_commit_from_dsc () {
185 foreach my $f (dsc_files()) {
186 die if $f =~ m#/|^\.|\.dsc$|\.tmp$#;
188 link "../../../$f", $f
192 runcmd qw(dget), @dget_opts, qw(--), $dscurl;
193 foreach my $f (grep { is_orig_file($_) } @files) {
194 link $f, "../../../$f"
198 my ($tree,$dir) = mktree_in_ud_from_only_subdir();
199 runcmd qw(sh -ec), 'dpkg-parsechangelog >../changelog.tmp';
200 my $clogp = parsecontrol('../changelog.tmp','changelog') or die;
201 my $date = cmdoutput qw(date), '+%s %z', qw(-d),$clogp->{Date};
202 my $author = $clogp->{Maintainer};
203 $author =~ s#,.*##ms;
204 my $authline = "$author $date";
205 $authline =~ m/^[^<>]+ \<\S+\> \d+ [-+]\d+$/ or die $authline;
206 open C, ">../commit.tmp" or die $!;
207 print C "tree $tree\n" or die $!;
208 print C "parent $upload_hash\n" or die $! if defined $upload_hash;
209 print C <<END or die $!;
215 # imported by dgit from the archive
218 print "synthesised git commit from .dsc $clogp->{Version}\n";
219 my $commithash = cmdoutput qw(git hash-object -w -t commit ../commit.tmp);
220 chdir '../../../..' or die $!;
221 cmdoutput qw(git update-ref -m),"dgit synthesise $clogp->{Version}",
222 'DGIT_ARCHIVE', $commithash;
223 cmdoutput qw(git log -n2), $commithash;
224 # ... gives git a chance to complain if our commit is malformed
225 my $outputhash = $commithash;
226 if (defined $upload_hash) {
227 chdir "$ud/$dir" or die $!;
228 runcmd qw(git reset --hard), $upload_hash;
229 runcmd qw(sh -ec), 'dpkg-parsechangelog >>../changelogold.tmp';
230 my $oldclogp = Dpkg::Control::Hash->new();
231 $oldclogp->parse('../changelogold.tmp','previous changelog') or die;
233 version_compare_string($oldclogp->{Version}, $clogp->{Version});
235 # git upload/ is earlier vsn than archive, use archive
236 } elsif ($vcmp >= 0) {
237 print STDERR <<END or die $!;
238 Version actually in archive: $clogp->{Version} (older)
239 Last allegedly pushed/uploaded: $oldclogp->{Version} (newer or same)
240 Perhaps the upload is stuck in incoming. Using the version from git.
243 die "version in archive is same as version in git".
244 " to-be-uploaded (upload/) branch but archive".
245 " version hash no commit hash?!\n";
247 chdir '../../../..' or die $!;
253 sub ensure_we_have_orig () {
254 foreach my $f (dsc_files()) {
255 next unless is_orig_file($f);
257 die "$f ?" unless -f _;
259 die "$f $!" unless $!==&ENOENT;
261 my $origurl = $dscurl;
262 $origurl =~ s{/[^/]+$}{};
264 die "$f ?" unless $f =~ m/^${package}_/;
265 die "$f ?" if $f =~ m#/#;
266 runcmd qw(sh -ec),'cd ..; exec dget -- "$1"','x',$origurl;
271 return cmdoutput qw(git rev-parse --), "$_[0]~0";
274 sub is_fast_fwd ($$) {
275 my ($ancestor,$child) = @_;
276 my $mb = cmdoutput qw(git merge-base), $dsc_hash, $upload_hash;
277 return rev_parse($mb) eq rev_parse($ancestor);
280 sub fetch_from_archive () {
281 # ensures that rref(uploadbranch()) is what is actually in the archive,
283 my $upload_ref = rref(uploadbranch());
284 $!=0; $upload_hash = `git show-ref --heads $upload_ref`;
286 die $? unless ($?==0 && chomp $upload_hash)
287 or ($?==256 && !length $upload_hash);
289 if (defined $dsc_hash) {
290 die "missing git history even though dsc has hash"
291 unless length $upload_hash;
293 ensure_we_have_orig();
295 $hash = generate_commit_from_dsc();
297 if (length $upload_hash) {
298 die "not fast forward on last upload branch!".
299 " (archive's version left in DGIT_ARCHIVE)"
300 unless is_fast_fwd($dsc_hash, $upload_hash);
302 if ($upload_hash ne $hash) {
303 cmdoutput qw(git update-ref -m), 'dgit fetch', $upload_ref, $hash;
309 $dsc_hash = $dsc->{$ourdscfield};
310 if (defined $dsc_hash) {
311 $dsc_hash =~ m/\w+/ or die "$dsc_hash $?";
313 print "last upload to archive specified git hash\n";
315 print "last upload to archive has NO git hash\n";
317 my $dstdir = "$package";
318 if (check_for_git()) {
319 print "cloning existing git history\n";
320 runcmd qw(git clone --origin),$remotename, qw(-b), $suite, '--',
321 $alioth_git, $dstdir;
322 chdir "$dstdir" or die "$dstdir $!";
323 fetch_from_archive();
324 runcmd qw(git reset --hard), rref(uploadbranch());
326 print "starting new git history\n";
327 mkdir $dstdir or die "$dstdir $!";
328 chdir "$dstdir" or die "$dstdir $!";
329 runcmd qw(git init -q);
330 open H, "> .git/HEAD" or die $!;
331 print H "ref: ".lref(uploadbranch())."\n" or die $!;
333 runcmd qw(git remote add), $remotename, $alioth_git;
334 runcmd "git config branch.$suite.remote $remotename";
335 runcmd "git config branch.$suite.merge ".lref(uploadbranch());
336 my $newhash = generate_commit_from_dsc();
337 runcmd qw(git reset --hard), $newhash;
339 print "ready for work in $dstdir\n";
343 if (check_for_git()) {
344 runcmd qw(git fetch -p),$remotename,
345 '+refs/heads/*:refs/remotes/origin/*';
347 fetch_from_archive();
352 runcmd qw(git merge -m),"Merge from $suite [dgit]",lref(uploadbranch());
356 runcmd qw(git diff --quiet HEAD);
357 my $clogp = parsechangelog();
358 $package = $clogp->{Source};
359 my $dscfn = "${package}_$clogp->{Version}.dsc";
360 stat $dscfn or die "$dscfn $!";
361 $dsc = parsecontrol("../$dscfn");
364 print "checking that $dscfn corresponds to HEAD\n";
365 runcmd qw(dpkg-source -x --), "../../../../$dscfn";
366 my $tree = mktree_in_ud_from_only_subdir();
367 chdir '../../../..' or die $!;
368 runcmd qw(git diff --exit-code), $tree;
370 #do fast forward check and maybe fake merge
371 # if (!is_fast_fwd(mainbranch
372 # runcmd qw(git fetch -p ), $alioth_git,
373 # map { lref($_).":".rref($_) }
375 $dsc->{$ourdscfield} = rev_parse('HEAD');
376 $dsc->save("../$dscfn.tmp") or die $!;
377 rename "../$dscfn.tmp","../$dscfn" or die "$dscfn $!";
379 runcmd qw(git tag -s),@git_tag_opts,qw(-m),
380 "Release $dsc->{Version} for $suite [dgit]";
381 unlink "../$dscfn.asc" or $!==&ENOENT or die "$dscfn.asc $!";
382 runcmd qw(gpg --clearsign),@gpg_opts,"../$dscfn";
383 rename "../$dscfn.asc","../$dscfn" or die "$dscfn $!";
386 runcmd qw(git push),$remotename,"HEAD:".lref(uploadbranch());
387 runcmd qw(dput),"../$dscfn";
395 ($package,$suite) = @ARGV;
403 my $branch = `git-symbolic-ref HEAD`;
404 if ($branch =~ m#^refs/heads/dgit/([^/.]+)$#) {
412 my $clogp = parsechangelog();
413 $package = $clogp->{Source};
415 $suite = branchsuite();
416 $suite ||= $clogp->{Distribution};
417 print "fetching from suite $suite\n";
427 my $clogp = parsechangelog();
428 $package = $clogp->{Source};
430 $suite = $clogp->{Distribution};
438 die if @ARGV && $ARGV[0] =~ m/^\-/;
443 my $cmd = shift @ARGV;
446 { no strict qw(refs); &{"cmd_$cmd"}(); }