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 END { $? = 127; } # deliberate exit uses _exit
22 our $distro = shift @ARGV // die "need DISTRO";
23 our $repos = shift @ARGV // die "need DGIT-REPOS-DIR";
24 our $dgitlive = shift @ARGV // die "need DGIT-LIVE-DIR";
25 our $distrodir = shift @ARGV // die "need DISTRO-DIR";
26 our $action = shift @ARGV // die "need ACTION";
28 our $publicmode = 02775;
29 our $new_upload_propagation_slop = 3600*4 + 100;# fixme config;
34 our ($pkg_exists,$pkg_secret);
38 our ($version,$suite,$tagname);
41 # We assume that it is not possible for NEW to have a version older
44 # Whenever pushing, we check for
45 # source-package-local tainted history
46 # global tainted history
47 # can be overridden by --deliberately except for an admin prohib taint
49 # ALL of the following apply only if history is secret:
51 # if NEW has no version, or a version which is not in our history[1]
54 # if any suite's version is in our history[1], publish our history
55 # otherwise discard our history,
56 # tainting --deliberately-include-questionable-history
58 # if NEW has a version which is in our history[1]
60 # require explicit specification of one of
61 # --deliberately-include-questionable-history
62 # --deliberately-not-fast-forward
63 # (latter will taint old NEW version --d-i-q-h)
67 # [1] looking for the relevant git tag for the version number and not
68 # caring what that tag refers to.
70 # A wrinkle: if we approved a push recently, we treat NEW as having
71 # a version which is in our history. This is because the package may
72 # still be being uploaded. (We record this using the timestamp of the
73 # package's git repo directory.)
75 # We aim for the following invariants and properties:
77 # - .dsc of published dgit package will have corresponding publicly
78 # visible dgit-repo (soon)
80 # - when a new package is rejected we help maintainer avoid
81 # accidentally including bad objects in published dgit history
83 # - .dsc of NEW dgit package has corresponding dgit-repo but not
89 my $dgit = "$dgitlive/dgit";
90 $dgit = "dgit" if !stat_exists $dgit;
91 my $cmd = "$dgit -d$distro \$DGIT_TEST_OPTS";
92 $cmd .= " -".("D" x $debuglevel) if $debuglevel;
93 $cmd .= " archive-api-query $subpath";
94 printdebug "apiquery $cmd\n";
95 $!=0; $?=0; my $json = `$cmd`;
96 defined $json && !$? or die "$subpath $! $?";
97 my $r = decode_json $json;
98 my $d = new Data::Dumper([$r], [qw(r)]);
99 printdebug "apiquery $subpath | ", $d->Dump() if $debuglevel>=2;
103 sub specific_suite_has_vsn_in_our_history ($) {
105 my $in_suite = apiquery "dsc_in_suite/$suite/$pkg";
106 foreach my $entry (@$in_suite) {
107 my $vsn = $entry->{version};
108 die "$pkg ?" unless defined $vsn;
109 my $tagref = "refs/tags/".debiantag $vsn;
110 printdebug " checking history suite=$suite vsn=$vsn tagref=$tagref\n";
111 $?=0; my $r = system qw(git show-ref --verify --quiet), $tagref;
114 die "$pkg tagref $tagref $? $!";
119 sub new_has_vsn_in_our_history () {
120 return specific_suite_has_vsn_in_our_history('new');
123 sub good_suite_has_vsn_in_our_history () {
124 my $suites = apiquery "suites";
125 foreach my $suitei (@$suites) {
126 my $suite = $suitei->{name};
127 die unless defined $suite;
128 next if $suite =~ m/\bnew$/;
129 return 1 if specific_suite_has_vsn_in_our_history($suite);
135 $pkgdir = "$repos/$pkg.git";
136 if (!stat_exists $pkgdir) {
137 printdebug "statpackage $pkg => ENOENT\n";
141 $pkg_secret = !!(~(stat _)[2] & 05);
142 printdebug "statpackage $pkg => exists, secret=$pkg_secret.\n";
147 die unless @ARGV >= 1;
149 die unless $pkg =~ m/^$package_re$/;
155 my ($refobj, $reason) = @_;
157 printdebug "TAINTING $refobj\n",
158 (map { "\%| $_" } split "\n", $reason),
161 my $tf = new File::Temp or die $!;
162 print $tf "$refobj^0\n" or die $!;
164 seek $tf,0,0 or die $!;
166 my $gcfpid = open GCF, "-|";
167 defined $gcfpid or die $!;
169 open STDIN, "<&", $tf or die $!;
170 exec 'git', 'cat-file', '--batch';
177 m/^(\w+) (\w+) (\d+)\n/ or die "$_ ?";
183 if ($gitobjtype eq 'commit' or $gitobjtype eq 'tag') {
184 $!=0; read GCF, $gitobjdata, $bytes == $bytes
185 or die "$gitobjid $bytes $!";
189 $poldbh->do("INSERT INTO taints".
190 " (package, gitobjid, gitobjtype, gitobjdata, time, comment)".
191 " VALUES (?,?,?,?,?,?)", {},
192 $pkg, $gitobjid, $gitobjtype, $gitobjdata, time, $reason);
194 my $taint_id = $poldbh->last_insert_id(undef,undef,"taints","taint_id");
195 die unless defined $taint_id;
197 $poldbh->do("INSERT INTO taintoverrides".
198 " (taint_id, deliberately)".
199 " VALUES (?, '--deliberately-include-questionable-history')",
203 sub add_taint_by_tag ($$) {
204 my ($tagname,$refobjid) = @_;
206 "tag $tagname referred to this object in git tree but all".
207 " previously pushed versions were found to have been".
208 " removed from NEW (ie, rejected) (or never arrived)");
211 sub check_package () {
212 return 0 unless $pkg_exists;
213 return 0 unless $pkg_secret;
215 printdebug "check_package\n";
217 chdir $pkgdir or die "$pkgdir $!";
219 stat '.' or die "$pkgdir $!";
220 my $mtime = ((stat _)[9]);
221 my $age = time - $mtime;
222 printdebug "check_package age=$age\n";
224 if (good_suite_has_vsn_in_our_history) {
225 chmod $publicmode, "." or die $!;
230 return 0 if $age < $new_upload_propagation_slop;
232 return 0 if new_has_vsn_in_our_history();
234 printdebug "check_package secret, deleted, tainting\n";
236 git_for_each_ref('refs/tags', sub {
237 my ($objid,$objtype,$fullrefname,$tagname) = @_;
238 add_taint_by_tag($tagname,$objid);
244 sub action_check_package () {
246 return check_package();
250 die unless @ARGV >= 4;
251 $version = shift @ARGV;
252 $suite = shift @ARGV;
253 $tagname = shift @ARGV;
254 my $delibs = shift @ARGV;
255 foreach my $delib (split /\,/, $delibs) {
256 $deliberately{$delib} = 1;
260 sub deliberately ($) { return $deliberately{"--deliberately-$_[0]"}; }
266 check_package(); # might make package public, or might add taints
268 return 0 unless $pkg_exists;
269 return 0 unless $pkg_secret;
271 # we suppose that NEW has a version which is already in our
272 # history, as otherwise the repo would have been blown away
274 if (deliberately('not-fast-forward')) {
275 add_taint(server_ref($suite),
276 "rewound suite $suite; --deliberately-not-fast-forward".
277 " specified in signed tag $tagname for upload of".
278 " version $version");
279 return NOFFCHECK|FRESHREPO;
281 if (deliberately('include-questionable-history')) {
284 die "Package is in NEW and has not been accepted or rejected yet;".
285 " use a --deliberately option to specify whether you are".
286 " keeping or discarding the previously pushed history. ".
287 " Please RTFM dgit(1).\n";
290 sub action_push_confirm () {
293 die unless @ARGV >= 1;
294 my $freshrepo = shift @ARGV;
296 my $initq = $poldbh->prepare(<<END);
297 SELECT taint_id, gitobjid FROM taints t
298 WHERE (package = ? OR package = '')
300 $initq->execute($pkg);
302 my @objscatcmd = qw(git);
303 push @objscatcmd, qw(--git-dir), $freshrepo if length $freshrepo;
304 push @objscatcmd, qw(cat-file --batch);
305 debugcmd '|',@objscatcmd if $debuglevel>=2;
308 my $chkinput = tempfile();
309 while (my $taint = $initq->fetchrow_hashref()) {
310 push @taintids, $taint->{taint_id};
311 print $chkinput $taint->{gitobjid}, "\n" or die $!;
312 printdebug '|> ', $taint->{gitobjid}, "\n" if $debuglevel>=2;
314 flush $chkinput or die $!;
315 seek $chkinput,0,0 or die $!;
317 my $checkpid = open CHKOUT, "-|" // die $!;
319 open STDIN, "<&", $chkinput or die $!;
320 exec @objscatcmd or die $!;
323 my ($taintinfoq,$overridesanyq,$untaintq,$overridesq);
325 my $overridesstmt = <<END;
326 SELECT deliberately FROM taintoverrides WHERE (
329 my @overridesv = sort keys %deliberately;
330 $overridesstmt .= <<END foreach @overridesv;
333 $overridesstmt .= <<END;
335 ORDER BY deliberately ASC
340 while (my $taintid = shift @taintids) {
341 # git cat-file prints a spurious newline after it gets EOF
342 # This is not documented. I guess it might go away. So we
343 # just read what we expect and then let it get SIGPIPE.
345 die "$? $!" unless defined $_;
346 printdebug "|< ", $_ if $debuglevel>=2;
348 next if m/^\w+ missing$/;
349 die unless m/^(\w+) (\w+) (\d+)\s/;
350 my ($objid,$objtype,$nbytes) = ($1,$2,$3);
353 (read CHKOUT, $drop, $nbytes) == $nbytes or die;
355 $taintinfoq ||= $poldbh->prepare(<<END);
356 SELECT package, time, comment FROM taints WHERE taint_id = ?
358 $taintinfoq->execute($taintid);
360 my $ti = $taintinfoq->fetchrow_hashref();
363 my $timeshow = defined $ti->{time}
364 ? " at time ".strftime("%Y-%m-%d %H:%M:%S Z", gmtime $ti->{time})
366 my $pkgshow = length $ti->{package}
367 ? "package $ti->{package}"
372 History contains tainted $objtype $objid
373 Taint recorded$timeshow for $pkgshow
374 Reason: $ti->{comment}
377 printdebug "SQL overrides: @overridesv $taintid /\n$overridesstmt\n";
379 $overridesq ||= $poldbh->prepare($overridesstmt);
380 $overridesq->execute(@overridesv, $taintid);
381 my ($ovwhy) = $overridesq->fetchrow_array();
382 if (!defined $ovwhy) {
383 $overridesanyq ||= $poldbh->prepare(<<END);
384 SELECT 1 FROM taintoverrides WHERE taint_id = ? LIMIT 1
386 $overridesanyq->execute($taintid);
387 my ($ovany) = $overridesanyq->fetchrow_array();
388 $stderr .= $ovany ? <<END : <<END;
389 Could be forced using --deliberately. Consult documentation.
391 Uncorrectable error. If confused, consult administrator.
396 Forcing due to --deliberately-$ovwhy
398 $untaintq ||= $poldbh->prepare(<<END);
399 DELETE FROM taints WHERE taint_id = ?
401 $untaintq->execute($taintid);
409 Rejecting push due to questionable history.
414 if (length $freshrepo) {
415 if (!good_suite_has_vsn_in_our_history()) {
416 stat $freshrepo or die "$freshrepo $!";
417 my $oldmode = ((stat _)[2]);
418 my $oldwrites = $oldmode & 0222;
419 # remove r and x bits which have corresponding w bits clear
420 my $newmode = $oldmode &
421 (~0555 | ($oldwrites << 1) | ($oldwrites >> 1));
422 printdebug sprintf "chmod %#o (was %#o) %s\n",
423 $newmode, $oldmode, $freshrepo;
424 chmod $newmode, $freshrepo or die $!;
425 utime undef, undef, $freshrepo or die $!;
432 sub action_check_list () {
433 opendir L, "$repos" or die "$repos $!";
434 while (defined (my $dent = readdir L)) {
435 next unless $dent =~ m/^($package_re)\.git$/;
438 next unless $pkg_exists;
439 next unless $pkg_secret;
440 print "$pkg\n" or die $!;
442 closedir L or die $!;
443 close STDOUT or die $!;
448 my $fn = ${*::}{"action_$action"};
450 printdebug "dgit-repos-policy-debian: unknown action $action\n";
457 my $db_busy_exception= 'Debian::Dgit::Policy::Debian::DB_BUSY';
464 poldb_setup(poldb_path($repos), sub {
465 $poldbh->{HandleError} = sub {
466 return 0 unless $poldbh->err == 5; # SQLITE_BUSY, not in .pm :-(
467 die bless { }, $db_busy_exception;
470 eval ($ENV{'DGIT_RPD_TEST_DBLOOP_HOOK'}//'');
472 # used by tests/tests/debpolicy-dbretry
478 die unless defined $rcode;
482 last unless length $@;
483 die $@ unless ref $@ eq $db_busy_exception;
485 die if $sleepy >= 20;
487 print STDERR "[policy database busy, retrying (${sleepy}s)]\n";
489 eval { $poldbh->rollback; };
492 print STDERR $stderr or die $!;
493 flush STDERR or die $!;