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;
36 our $existing_package = 'dpkg';
38 our %format_ok = map { $_=>1 } ("1.0","3.0 (native)","3.0 (quilt)");
41 our (@dget) = qw(dget);
42 our (@dput) = qw(dput);
43 our (@debsign) = qw(debsign);
47 open DEBUG, ">/dev/null" or die $!;
49 our %opts_opt_map = ('dget' => \@dget,
51 'debsign' => \@debsign);
53 our $remotename = 'dgit';
54 our $ourdscfield = 'Vcs-Dgit-Master';
55 our $branchprefix = 'dgit';
57 sub lbranch () { return "$branchprefix/$suite"; }
58 my $lbranch_re = '^refs/heads/'.$branchprefix.'/([^/.]+)$';
59 sub lref () { return "refs/heads/".lbranch(); }
60 sub lrref () { return "refs/remotes/$remotename/$suite"; }
61 sub rrref () { return "refs/$branchprefix/$suite"; }
62 sub debiantag ($) { return "debian/$_[0]"; }
66 return "+".rrref().":".lrref();
73 $ua = LWP::UserAgent->new();
76 print "downloading @_...\n";
77 my $r = $ua->get(@_) or die $!;
78 die "$_[0]: ".$r->status_line."; failed.\n" unless $r->is_success;
79 return $r->decoded_content();
82 our ($dscdata,$dscurl,$dsc);
87 print $fh $intro or die $!;
91 if (s{['\\]}{\\$&}g || m{\s} || m{[^-_./0-9a-z]}i) {
92 print $fh " '$_'" or die $!;
94 print $fh " $_" or die $!;
97 print $fh "\n" or die $!;
101 printcmd(\*DEBUG,"+",@_) if $debug>0;
103 die "@_ $! $?" if system @_;
106 sub cmdoutput_errok {
107 die Dumper(\@_)." ?" if grep { !defined } @_;
108 printcmd(\*DEBUG,"|",@_) if $debug>0;
109 open P, "-|", @_ or die $!;
112 { local $/ = undef; $d = <P>; }
114 close P or return undef;
120 my $d = cmdoutput_errok @_;
121 defined $d or die "@_ $? $!";
126 printcmd(\*STDOUT,"#",@_);
129 sub runcmd_ordryrun {
137 our %defcfg = ('dgit.default.distro' => 'debian',
138 'dgit.default.username' => '',
139 'dgit.default.archive-query-default-component' => 'main',
140 'dgit.default.ssh' => 'ssh',
141 'dgit-distro.debian.git-host' => 'git.debian.org',
142 'dgit-distro.debian.git-proto' => 'git+ssh://',
143 'dgit-distro.debian.git-path' => '/git/dgit-repos',
144 'dgit-distro.debian.git-check' => 'ssh-cmd',
145 'dgit-distro.debian.git-create' => 'ssh-cmd',
146 'dgit-distro.debian.mirror' => 'http://ftp.debian.org/debian/');
152 local ($debug) = $debug-1;
153 $v = cmdoutput_errok(@git, qw(config --), $c);
161 my $dv = $defcfg{$c};
162 return $dv if defined $dv;
167 sub access_distro () {
168 return cfg("dgit-suite.$suite.distro",
169 "dgit.default.distro");
174 my $distro = access_distro();
175 my $value = cfg("dgit-distro.$distro.$key",
176 "dgit.default.$key");
180 sub access_gituserhost () {
181 my $user = access_cfg('git-user');
182 my $host = access_cfg('git-host');
183 return defined($user) && length($user) ? "$user\@$host" : $host;
186 sub access_giturl () {
187 my $url = access_cfg('git-url');
190 access_cfg('git-proto').
191 access_gituserhost().
192 access_cfg('git-path');
194 return "$url/$package.git";
198 my $c = Dpkg::Control::Hash->new();
199 $c->load(@_) or return undef;
204 my $c = Dpkg::Control::Hash->new();
205 my $p = new IO::Handle;
206 open $p, '-|', qw(dpkg-parsechangelog) or die $!;
208 $?=0; $!=0; close $p or die "$! $?";
214 sub archive_query () {
215 my $query = access_cfg('archive-query');
216 $query ||= "madison:".access_distro();
217 $query =~ s/^(\w+):// or die "$query ?";
220 die unless $proto eq 'madison';
221 $rmad ||= cmdoutput qw(rmadison -asource),"-s$suite","-u$url",$package;
225 $rmad =~ m{^ \s*( [^ \t|]+ )\s* \|
226 \s*( [^ \t|]+ )\s* \|
227 \s*( [^ \t|/]+ )(?:/([^ \t|/]+)) \s* \|
228 \s*( [^ \t|]+ )\s* }x or die "$rmad $?";
229 $1 eq $package or die "$rmad $package ?";
232 # madison canonicalises for us
233 print "canonical suite name for $suite is $3\n";
240 $component = access_cfg('archive-query-default-component');
242 $5 eq 'source' or die "$rmad ?";
243 my $prefix = substr($package, 0, $package =~ m/^l/ ? 4 : 1);
244 my $subpath = "/pool/$component/$prefix/$package/${package}_$vsn.dsc";
245 return ($vsn,$subpath);
248 sub canonicalise_suite () {
249 archive_query() or die;
252 sub get_archive_dsc () {
253 my ($vsn,$subpath) = archive_query();
254 if (!defined $vsn) { $dsc=undef; return undef; }
255 $dscurl = access_cfg('mirror').$subpath;
256 $dscdata = url_get($dscurl);
257 my $dscfh = new IO::File \$dscdata, '<' or die $!;
258 print DEBUG Dumper($dscdata) if $debug>1;
259 $dsc = Dpkg::Control::Hash->new(allow_pgp=>1);
260 $dsc->parse($dscfh, 'dsc') or die "parsing of $dscurl failed\n";
261 print DEBUG Dumper($dsc) if $debug>1;
262 my $fmt = $dsc->{Format};
263 die "unsupported format $fmt, sorry\n" unless $format_ok{$fmt};
266 sub check_for_git () {
268 my $how = access_cfg('git-check');
269 if ($how eq 'ssh-cmd') {
271 (access_cfg('ssh'),access_gituserhost(),
272 " set -e; cd ".access_cfg('git-path').";".
273 " if test -d $package.git; then echo 1; else echo 0; fi");
274 print DEBUG "got \`$r'\n";
275 die "$r $! $?" unless $r =~ m/^[01]$/;
278 die "unknown git-check $how ?";
282 sub create_remote_git_repo () {
283 my $how = access_cfg('git-create');
284 if ($how eq 'ssh-cmd') {
286 (access_cfg('ssh'),access_gituserhost(),
287 "set -e; cd ".access_cfg('git-path').";".
288 " mkdir -p $package.git;".
290 " if ! test -d objects; then git init --bare; fi");
292 die "unknown git-create $how ?";
296 our ($dsc_hash,$upload_hash);
298 our $ud = '.git/dgit/unpack';
306 sub mktree_in_ud_from_only_subdir () {
307 # changes into the subdir
310 $dirs[0] =~ m#^([^/]+)/\.$# or die;
312 chdir $dir or die "$dir $!";
314 die $! unless $!==&ENOENT;
315 runcmd qw(git init -q);
316 rmtree('.git/objects');
317 symlink '../../../../objects','.git/objects' or die $!;
318 runcmd @git, qw(add -Af);
319 my $tree = cmdoutput @git, qw(write-tree);
320 chomp $tree; $tree =~ m/^\w+$/ or die "$tree ?";
326 m/^\w+ \d+ (\S+)$/ or die "$_ ?";
328 } grep m/\S/, split /\n/, ($dsc->{'Checksums-Sha256'} || $dsc->{Files});
331 sub is_orig_file ($) {
333 m/\.orig(?:-\w+)?\.tar\.\w+$/;
336 sub generate_commit_from_dsc () {
340 foreach my $f (dsc_files()) {
341 die if $f =~ m#/|^\.|\.dsc$|\.tmp$#;
343 link "../../../$f", $f
347 runcmd @dget, qw(--), $dscurl;
348 foreach my $f (grep { is_orig_file($_) } @files) {
349 link $f, "../../../../$f"
353 my ($tree,$dir) = mktree_in_ud_from_only_subdir();
354 runcmd qw(sh -ec), 'dpkg-parsechangelog >../changelog.tmp';
355 my $clogp = parsecontrol('../changelog.tmp','changelog') or die;
356 my $date = cmdoutput qw(date), '+%s %z', qw(-d),$clogp->{Date};
357 my $author = $clogp->{Maintainer};
358 $author =~ s#,.*##ms;
359 my $authline = "$author $date";
360 $authline =~ m/^[^<>]+ \<\S+\> \d+ [-+]\d+$/ or die $authline;
361 open C, ">../commit.tmp" or die $!;
362 print C "tree $tree\n" or die $!;
363 print C "parent $upload_hash\n" or die $! if $upload_hash;
364 print C <<END or die $!;
370 # imported by dgit from the archive
373 my $commithash = cmdoutput @git, qw(hash-object -w -t commit ../commit.tmp);
374 print "synthesised git commit from .dsc $clogp->{Version}\n";
375 chdir '../../../..' or die $!;
376 cmdoutput @git, qw(update-ref -m),"dgit synthesise $clogp->{Version}",
377 'DGIT_ARCHIVE', $commithash;
378 cmdoutput @git, qw(log -n2), $commithash;
379 # ... gives git a chance to complain if our commit is malformed
380 my $outputhash = $commithash;
382 chdir "$ud/$dir" or die $!;
383 runcmd @git, qw(reset --hard), $upload_hash;
384 runcmd qw(sh -ec), 'dpkg-parsechangelog >>../changelogold.tmp';
385 my $oldclogp = Dpkg::Control::Hash->new();
386 $oldclogp->parse('../changelogold.tmp','previous changelog') or die;
388 version_compare_string($oldclogp->{Version}, $clogp->{Version});
390 # git upload/ is earlier vsn than archive, use archive
391 } elsif ($vcmp >= 0) {
392 print STDERR <<END or die $!;
393 Version actually in archive: $clogp->{Version} (older)
394 Last allegedly pushed/uploaded: $oldclogp->{Version} (newer or same)
395 Perhaps the upload is stuck in incoming. Using the version from git.
398 die "version in archive is same as version in git".
399 " to-be-uploaded (upload/) branch but archive".
400 " version hash no commit hash?!\n";
402 chdir '../../../..' or die $!;
408 sub ensure_we_have_orig () {
409 foreach my $f (dsc_files()) {
410 next unless is_orig_file($f);
412 die "$f ?" unless -f _;
414 die "$f $!" unless $!==&ENOENT;
416 my $origurl = $dscurl;
417 $origurl =~ s{/[^/]+$}{};
419 die "$f ?" unless $f =~ m/^${package}_/;
420 die "$f ?" if $f =~ m#/#;
421 runcmd_ordryrun qw(sh -ec),'cd ..; exec "$@"','x',
427 return cmdoutput @git, qw(rev-parse), "$_[0]~0";
430 sub is_fast_fwd ($$) {
431 my ($ancestor,$child) = @_;
432 my $mb = cmdoutput @git, qw(merge-base), $dsc_hash, $upload_hash;
433 return rev_parse($mb) eq rev_parse($ancestor);
436 sub git_fetch_us () {
437 die "cannot dry run with fetch" if $dryrun;
438 runcmd @git, qw(fetch),access_giturl(),fetchspec();
441 sub fetch_from_archive () {
442 # ensures that lrref() is what is actually in the archive,
444 get_archive_dsc() or return 0;
445 $dsc_hash = $dsc->{$ourdscfield};
446 if (defined $dsc_hash) {
447 $dsc_hash =~ m/\w+/ or die "$dsc_hash $?";
449 print "last upload to archive specified git hash\n";
451 print "last upload to archive has NO git hash\n";
455 cmdoutput_errok @git, qw(show-ref --heads), lrref();
457 die unless chomp $upload_hash;
464 if (defined $dsc_hash) {
465 die "missing git history even though dsc has hash"
468 ensure_we_have_orig();
470 $hash = generate_commit_from_dsc();
473 die "not fast forward on last upload branch!".
474 " (archive's version left in DGIT_ARCHIVE)"
475 unless is_fast_fwd($dsc_hash, $upload_hash);
477 if ($upload_hash ne $hash) {
478 my @upd_cmd = (@git, qw(update-ref -m), 'dgit fetch', lrref(), $hash);
482 dryrun_report @upd_cmd;
490 die "dry run makes no sense with clone" if $dryrun;
491 mkdir $dstdir or die "$dstdir $!";
492 chdir "$dstdir" or die "$dstdir $!";
493 runcmd @git, qw(init -q);
494 runcmd @git, qw(config), "remote.$remotename.fetch", fetchspec();
495 open H, "> .git/HEAD" or die $!;
496 print H "ref: ".lref()."\n" or die $!;
498 runcmd @git, qw(remote add), 'origin', access_giturl();
499 if (check_for_git()) {
500 print "fetching existing git history\n";
502 runcmd @git, qw(fetch origin);
504 print "starting new git history\n";
506 fetch_from_archive() or die;
507 runcmd @git, qw(reset --hard), lrref();
508 print "ready for work in $dstdir\n";
512 if (check_for_git()) {
515 fetch_from_archive() or die;
520 runcmd_ordryrun @git, qw(merge -m),"Merge from $suite [dgit]",
525 runcmd @git, qw(diff --quiet HEAD);
526 my $clogp = parsechangelog();
527 $package = $clogp->{Source};
528 my $dscfn = "${package}_$clogp->{Version}.dsc";
529 stat "../$dscfn" or die "$dscfn $!";
530 $dsc = parsecontrol("../$dscfn");
533 print "checking that $dscfn corresponds to HEAD\n";
534 runcmd qw(dpkg-source -x --), "../../../../$dscfn";
535 my ($tree,$dir) = mktree_in_ud_from_only_subdir();
536 chdir '../../../..' or die $!;
537 runcmd @git, qw(diff --exit-code), $tree;
539 #do fast forward check and maybe fake merge
540 # if (!is_fast_fwd(mainbranch
541 # runcmd @git, qw(fetch -p ), "$alioth_git/$package.git",
542 # map { lref($_).":".rref($_) }
544 $dsc->{$ourdscfield} = rev_parse('HEAD');
545 $dsc->save("../$dscfn.tmp") or die $!;
547 rename "../$dscfn.tmp","../$dscfn" or die "$dscfn $!";
549 print "[new .dsc left in $dscfn.tmp]\n";
552 my $pat = "../${package}_$clogp->{Version}_*.changes";
554 die "$pat ?" unless @cs==1;
555 ($changesfile) = @cs;
557 my $tag = debiantag($dsc->{Version});
558 if (!check_for_git()) {
559 create_remote_git_repo();
561 runcmd_ordryrun @git, qw(push),access_giturl(),"HEAD:".rrref();
563 my @tag_cmd = (@git, qw(tag -s -m),
564 "Release $dsc->{Version} for $suite [dgit]");
565 push @tag_cmd, qw(-u),$keyid if defined $keyid;
567 runcmd_ordryrun @tag_cmd;
568 my @debsign_cmd = @debsign;
569 push @debsign_cmd, "-k$keyid" if defined $keyid;
570 push @debsign_cmd, $changesfile;
571 runcmd_ordryrun @debsign_cmd;
573 runcmd_ordryrun @git, qw(push),access_giturl(),"refs/tags/$tag";
574 my $host = access_cfg('upload-host');
575 my @hostarg = defined($host) ? ($host,) : ();
576 runcmd_ordryrun @dput, @hostarg, $changesfile;
582 die if defined $package;
585 } elsif (@ARGV==2 && $ARGV[1] =~ m#^\w#) {
586 ($package,$suite) = @ARGV;
587 } elsif (@ARGV==2 && $ARGV[1] =~ m#^[./]#) {
588 ($package,$dstdir) = @ARGV;
590 ($package,$suite,$dstdir) = @ARGV;
594 $dstdir ||= "$package";
599 my $branch = cmdoutput_errok @git, qw(symbolic-ref HEAD);
601 if ($branch =~ m#$lbranch_re#o) {
608 sub fetchpullargs () {
609 if (!defined $package) {
610 my $sourcep = parsecontrol('debian/control');
611 $package = $sourcep->{Source};
614 $suite = branchsuite();
616 my $clogp = parsechangelog();
617 $suite = $clogp->{Distribution};
619 canonicalise_suite();
620 print "fetching from suite $suite\n";
623 canonicalise_suite();
643 die if defined $package;
644 my $clogp = parsechangelog();
645 $package = $clogp->{Source};
647 $suite = $clogp->{Distribution};
649 local ($package) = $existing_package; # this is a hack
650 canonicalise_suite();
655 if (fetch_from_archive()) {
656 is_fast_fwd(lrref(), 'HEAD') or die;
658 die unless $new_package;
664 # we pass further options and args to git-buildpackage
665 die if defined $package;
666 my $clogp = parsechangelog();
667 $suite = $clogp->{Distribution};
668 $package = $clogp->{Source};
670 qw(git-buildpackage -us -uc --git-no-sign-tags),
671 '--git-builder=dpkg-buildpackage -i\.git/ -I.git',
672 "--git-debian-branch=".lbranch(),
679 last unless $ARGV[0] =~ m/^-/;
683 if (m/^--dry-run$/) {
685 } elsif (m/^--no-sign$/) {
687 } elsif (m/^--new$/) {
689 } elsif (m/^--(\w+)=(.*)/s && ($om = $opts_opt_map{$1})) {
691 } elsif (m/^--(\w+):(.*)/s && ($om = $opts_opt_map{$1})) {
693 } elsif (m/^--existing-package=(.*)/s) {
694 $existing_package = $1;
703 open DEBUG, ">&STDERR" or die $!;
707 } elsif (s/^-c(.*=.*)//s) {
709 } elsif (s/^-C(.*)//s) {
711 } elsif (s/^-k(.*)//s) {
723 my $cmd = shift @ARGV;
725 { no strict qw(refs); &{"cmd_$cmd"}(); }