2 # dgit repos policy hook script for Debian
5 $SIG{__WARN__} = sub { die $_[0]; };
9 use File::Temp qw(tempfile);
14 use Debian::Dgit qw(:DEFAULT :policyflags);
15 use Debian::Dgit::Policy::Debian;
18 enabledebuglevel $ENV{'DGIT_DRS_DEBUG'};
20 our $distro = shift @ARGV // die "need DISTRO";
21 our $repos = shift @ARGV // die "need DGIT-REPOS-DIR";
22 our $dgitlive = shift @ARGV // die "need DGIT-LIVE-DIR";
23 our $action = shift @ARGV // die "need ACTION";
25 our $publicmode = 02775;
26 our $new_upload_propagation_slop = 3600*4 + 100;# fixme config;
31 our ($pkg_exists,$pkg_secret);
35 our ($version,$suite,$tagname);
38 # We assume that it is not possible for NEW to have a version older
41 # Whenever pushing, we check for
42 # source-package-local tainted history
43 # global tainted history
44 # can be overridden by --deliberately except for an admin prohib taint
46 # ALL of the following apply only if history is secret:
48 # if NEW has no version, or a version which is not in our history[1]
51 # if any suite's version is in our history[1], publish our history
52 # otherwise discard our history,
53 # tainting --deliberately-include-questionable-history
55 # if NEW has a version which is in our history[1]
57 # require explicit specification of one of
58 # --deliberately-include-questionable-history
59 # --deliberately-not-fast-forward
60 # (latter will taint old NEW version --d-i-q-h)
64 # [1] looking for the relevant git tag for the version number and not
65 # caring what that tag refers to.
67 # A wrinkle: if we approved a push recently, we treat NEW as having
68 # a version which is in our history. This is because the package may
69 # still be being uploaded. (We record this using the timestamp of the
70 # package's git repo directory.)
72 # We aim for the following invariants and properties:
74 # - .dsc of published dgit package will have corresponding publicly
75 # visible dgit-repo (soon)
77 # - when a new package is rejected we help maintainer avoid
78 # accidentally including bad objects in published dgit history
80 # - .dsc of NEW dgit package has corresponding dgit-repo but not
86 my $cmd = "$dgitlive/dgit -d$distro \$DGIT_TEST_OPTS";
87 $cmd .= " -".("D" x $debuglevel) if $debuglevel;
88 $cmd .= " archive-api-query $subpath";
89 printdebug "apiquery $cmd\n";
90 $!=0; $?=0; my $json = `$cmd`;
91 defined $json && !$? or die "$subpath $! $?";
92 my $r = decode_json $json;
93 my $d = new Data::Dumper([$r], [qw(r)]);
94 printdebug "apiquery $subpath | ", $d->Dump() if $debuglevel>=2;
98 sub specific_suite_has_vsn_in_our_history ($) {
100 my $in_suite = apiquery "/dsc_in_suite/$suite/$pkg";
101 foreach my $entry (@$in_suite) {
102 my $vsn = $entry->{version};
103 die "$pkg ?" unless defined $vsn;
104 my $tag = debiantag $vsn;
105 $?=0; my $r = system qw(git show-ref --verify --quiet), $tag;
108 die "$pkg tag $tag $? $!";
113 sub new_has_vsn_in_our_history () {
114 stat $pkgdir or die "$pkgdir $!";
115 my $mtime = ((stat _)[9]);
116 my $age = time - $mtime;
117 return 1 if $age < $new_upload_propagation_slop;
118 return specific_suite_has_vsn_in_our_history('new');
121 sub good_suite_has_vsn_in_our_history () {
122 my $suites = apiquery "/suites";
123 foreach my $suitei (@$suites) {
124 my $suite = $suitei->{name};
125 die unless defined $suite;
126 next if $suite =~ m/\bnew$/;
127 return 1 if specific_suite_has_vsn_in_our_history($suite);
133 $pkgdir = "$repos/$pkg.git";
134 if (!stat_exists $pkgdir) {
135 printdebug "statpackage $pkg => ENOENT\n";
139 $pkg_secret = !!(~(stat _)[2] & 05);
140 printdebug "statpackage $pkg => exists, secret=$pkg_secret.\n";
145 die unless @ARGV >= 1;
147 die unless $pkg =~ m/^$package_re$/;
153 my ($refobj, $reason) = @_;
155 printdebug "TAINTING $refobj\n",
156 (map { "\%| $_" } split "\n", $reason),
159 my $tf = new File::Temp or die $!;
160 print $tf "$refobj^0\n" or die $!;
162 seek $tf,0,0 or die $!;
164 my $gcfpid = open GCF, "-|";
165 defined $gcfpid or die $!;
167 open STDIN, "<&", $tf or die $!;
168 exec 'git', 'cat-file', '--batch';
175 m/^(\w+) (\w+) (\d+)\n/ or die "$_ ?";
181 if ($gitobjtype eq 'commit' or $gitobjtype eq 'tag') {
182 $!=0; read GCF, $gitobjdata, $bytes == $bytes
183 or die "$gitobjid $bytes $!";
187 $poldbh->do("INSERT INTO taints".
188 " (package, gitobjid, gitobjtype, gitobjdata, time, comment)".
189 " VALUES (?,?,?,?,?,?)", {},
190 $pkg, $gitobjid, $gitobjtype, $gitobjdata, time, $reason);
192 my $taint_id = $poldbh->last_insert_id(undef,undef,"taints","taint_id");
193 die unless defined $taint_id;
195 $poldbh->do("INSERT INTO taintoverrides".
196 " (taint_id, deliberately)".
197 " VALUES (?, 'include-questionable-history')", {},
201 sub add_taint_by_tag ($$) {
202 my ($tagname,$refobjid) = @_;
204 "tag $tagname referred to this object in git tree but all".
205 " previously pushed versions were found to have been".
206 " removed from NEW (ie, rejected) (or never arrived)");
209 sub action_check_package () {
211 return 0 unless $pkg_exists;
212 return 0 unless $pkg_secret;
214 chdir $pkgdir or die "$pkgdir $!";
215 return if new_has_vsn_in_our_history();
217 if (good_suite_has_vsn_in_our_history) {
218 chmod $publicmode, "." or die $!;
222 git_for_each_ref('refs/tags', sub {
223 my ($objid,$objtype,$fullrefname,$tagname) = @_;
224 add_taint_by_tag($tagname,$objid);
231 die unless @ARGV >= 4;
232 $version = shift @ARGV;
233 $suite = shift @ARGV;
234 $tagname = shift @ARGV;
235 my $delibs = shift @ARGV;
236 foreach my $delib (split /\,/, $delibs) {
237 $deliberately{$delib} = 1;
241 sub deliberately ($) { return $deliberately{$_[0]}; }
245 return 0 unless $pkg_exists;
246 return 0 unless $pkg_secret;
248 # we suppose that NEW has a version which is already in our
249 # history, as otherwise the repo would have been blown away
251 if (deliberately('not-fast-forward')) {
252 add_taint(server_ref($suite),
253 "suite $suite when --deliberately-not-fast-forward".
254 " specified in signed tag $tagname for upload of".
255 " version $version into suite $suite");
256 return NOFFCHECK|FRESHREPO;
258 if (deliberately('include-questionable-history')) {
261 die "Package is in NEW and has not been accepted or rejected yet;".
262 " use a --deliberately option to specify whether you are".
263 " keeping or discarding the previously pushed history. ".
264 " Please RTFM dgit(1).\n";
267 sub action_push_confirm () {
269 die unless @ARGV >= 5;
270 my $freshrepo = $ARGV[4];
272 my $initq = $poldbh->prepare(<<END);
273 SELECT taint_id, gitobjid FROM taints t
274 WHERE (package = ? OR package = '')
276 $initq->execute($pkg);
279 my $chkinput = tempfile();
280 while (my $taint = $initq->fetchrow_hashref()) {
281 push @taintids, $taint->{taint_id};
282 print $chkinput $taint->{gitobjid}, "\n" or die $!;
284 flush $chkinput or die $!;
285 seek $chkinput,0,0 or die $!;
287 my $checkpid = open CHKOUT, "-|" // die $!;
289 open STDIN, "<&", $chkinput or die $!;
290 exec qw(git cat-file --batch) or die $!;
293 my ($taintinfoq,$overridesanyq,$untaintq,$overridesq);
295 my $overridesstmt = <<END;
296 SELECT deliberately FROM taintoverrides WHERE ( 1
298 my @overridesv = sort keys %deliberately;
299 $overridesstmt .= join '', (<<END x @overridesv);
302 $overridesstmt .= <<END;
304 ORDER BY deliberately ASC
309 while (my $taintid = shift @taintids) {
310 # git cat-file prints a spurious newline after it gets EOF
311 # This is not documented. I guess it might go away. So we
312 # just read what we expect and then let it get SIGPIPE.
314 die "$? $!" unless defined $_;
316 next if m/^\w+ missing$/;
317 die unless m/^(\w+) (\w+) (\d+)\s/;
318 my ($objid,$objtype,$nbytes) = ($1,$2,$3);
321 (read CHKOUT, $drop, $nbytes) == $nbytes or die;
323 $taintinfoq ||= $poldbh->prepare(<<END);
324 SELECT package, time, comment FROM taints WHERE taint_id = ?
326 $taintinfoq->execute($taintid);
328 my $ti = $taintinfoq->fetchrow_hashref();
331 my $timeshow = defined $ti->{time}
332 ? " at time ".strftime("%Y-%m-%d %H:%M:%S Z", gmtime $ti->{time})
334 my $pkgshow = length $ti->{package}
335 ? "package $ti->{package}"
340 History contains tainted $objtype $objid
341 Taint recorded$timeshow for $pkgshow
342 Reason: $ti->{comment}
345 $overridesq ||= $poldbh->prepare($overridesstmt);
346 $overridesq->execute(@overridesv, $taintid);
347 my ($ovwhy) = $overridesq->fetchrow_array();
348 if (!defined $ovwhy) {
349 $overridesanyq ||= $poldbh->prepare(<<END);
350 SELECT 1 FROM taintoverrides WHERE taint_id = ? LIMIT 1
352 $overridesanyq->execute($taintid);
353 my ($ovany) = $overridesanyq->fetchrow_array();
354 $stderr .= $ovany ? <<END : <<END;
355 Could be forced using --deliberately. Consult documentation.
357 Uncorrectable error. If confused, consult administrator.
362 Forcing due to --deliberately-$ovwhy
364 $untaintq ||= $poldbh->prepare(<<END);
365 DELETE FROM taints WHERE taint_id = ?
367 $untaintq->execute($taintid);
375 Rejecting push due to questionable history.
380 if (length $freshrepo) {
381 if (!good_suite_has_vsn_in_our_history()) {
382 stat $freshrepo or die "$freshrepo $!";
383 my $oldmode = ((stat _)[2]);
384 my $oldwrites = $oldmode & 0222;
385 # remove r and x bits which have corresponding w bits clear
386 my $newmode = $oldmode &
387 (~0555 | ($oldwrites << 1) | ($oldwrites >> 1));
388 printdebug sprintf "chmod %#o (was %#o) %s\n",
389 $newmode, $oldmode, $freshrepo;
390 chmod $newmode, $freshrepo or die $!;
397 sub action_check_list () {
398 opendir L, "$repos" or die "$repos $!";
399 while (defined (my $dent = readdir L)) {
400 next unless $dent =~ m/^($package_re)\.git$/;
403 next unless $pkg_exists;
404 next unless $pkg_secret;
405 print "$pkg\n" or die $!;
407 closedir L or die $!;
408 close STDOUT or die $!;
413 my $fn = ${*::}{"action_$action"};
415 printdebug "dgit-repos-policy-debian: unknown action $action\n";
423 poldb_setup(poldb_path($repos));
427 die unless defined $rcode;
429 eval { $poldbh->commit; };
430 last unless length $@;
432 die if $sleepy >= 20;
433 print STDERR "[policy database busy, retrying]\n";
439 print STDERR $stderr;