5 # dgit-repos-server DISTRO DISTRO-DIR AUTH-SPEC [<settings>] --ssh
6 # dgit-repos-server DISTRO DISTRO-DIR AUTH-SPEC [<settings>] --cron
8 # --repos=GIT-REPOS-DIR default DISTRO-DIR/repos/
9 # --suites=SUITES-FILE default DISTRO-DIR/suites
10 # --policy-hook=POLICY-HOOK default DISTRO-DIR/policy-hook
11 # --dgit-live=DGIT-LIVE-DIR default DISTRO-DIR/dgit-live
12 # (DISTRO-DIR is not used other than as default and to pass to policy hook)
14 # .../dgit-repos-server --pre-receive-hook PACKAGE
16 # Invoked as the ssh restricted command
18 # Works like git-receive-pack
20 # SUITES is the name of a file which lists the permissible suites
21 # one per line (#-comments and blank lines ignored)
23 # AUTH-SPEC is a :-separated list of
24 # KEYRING.GPG,AUTH-SPEC
25 # where AUTH-SPEC is one of
28 # (With --cron AUTH-SPEC is not used and may be the empty string.)
31 $SIG{__WARN__} = sub { die $_[0]; };
33 # DGIT-REPOS-DIR contains:
34 # git tree (or other object) lock (in acquisition order, outer first)
36 # _tmp/PACKAGE_prospective ! } SAME.lock, held during receive-pack
38 # _tmp/PACKAGE_incoming$$ ! } SAME.lock, held during receive-pack
39 # _tmp/PACKAGE_incoming$$_fresh ! }
41 # PACKAGE.git } PACKAGE.git.lock
42 # PACKAGE_garbage } (also covers executions of
43 # PACKAGE_garbage-old } policy hook script for PACKAGE)
44 # PACKAGE_garbage-tmp }
45 # policy* } (for policy hook script, covered by
46 # } lock only when invoked for a package)
48 # leaf locks, held during brief operaton only:
53 # _template } SAME.lock
55 # locks marked ! may be held during client data transfer
57 # What we do on push is this:
58 # - extract the destination repo name
59 # - make a hardlink clone of the destination repo
60 # - provide the destination with a stunt pre-receive hook
61 # - run actual git-receive-pack with that new destination
62 # as a result of this the stunt pre-receive hook runs; it does this:
63 # + understand what refs we are allegedly updating and
64 # check some correspondences:
65 # * we are updating only refs/tags/debian/* and refs/dgit/*
66 # * and only one of each
67 # * and the tag does not already exist
69 # * recover the suite name from the destination refs/dgit/ ref
70 # + disassemble the signed tag into its various fields and signature
72 # * parsing the first line of the tag message to recover
73 # the package name, version and suite
74 # * checking that the package name corresponds to the dest repo name
75 # * checking that the suite name is as recovered above
76 # + verify the signature on the signed tag
77 # and if necessary check that the keyid and package are listed in dm.txt
78 # + check various correspondences:
79 # * the signed tag must refer to a commit
80 # * the signed tag commit must be the refs/dgit value
81 # * the name in the signed tag must correspond to its ref name
82 # * the tag name must be debian/<version> (massaged as needed)
83 # * the suite is one of those permitted
84 # * the signed tag has a suitable name
85 # * run the "push" policy hook
86 # * replay prevention for --deliberately-not-fast-forward
87 # * check the commit is a fast forward
88 # * handle a request from the policy hook for a fresh repo
89 # + push the signed tag and new dgit branch to the actual repo
91 # If the destination repo does not already exist, we need to make
92 # sure that we create it reasonably atomically, and also that
93 # we don't every have a destination repo containing no refs at all
94 # (because such a thing causes git-fetch-pack to barf). So then we
95 # do as above, except:
96 # - before starting, we take out our own lock for the destination repo
97 # - we create a prospective new destination repo by making a copy
99 # - we use the prospective new destination repo instead of the
100 # actual new destination repo (since the latter doesn't exist)
101 # - after git-receive-pack exits, we
102 # + check that the prospective repo contains a tag and head
103 # + rename the prospective destination repo into place
106 # - We are crash-only
107 # - Temporary working trees and their locks are cleaned up
108 # opportunistically by a program which tries to take each lock and
109 # if successful deletes both the tree and the lockfile
110 # - Prospective working trees and their locks are cleaned up by
111 # a program which tries to take each lock and if successful
112 # deletes any prospective working tree and the lock (but not
113 # of course any actual tree)
114 # - It is forbidden to _remove_ the lockfile without removing
115 # the corresponding temporary tree, as the lockfile is also
116 # a stampfile whose presence indicates that there may be
119 # Policy hook script is invoked like this:
120 # POLICY-HOOK-SCRIPT DISTRO DGIT-REPOS-DIR DGIT-LIVE-DIR DISTRO-DIR ACTION...
122 # POLICY-HOOK-SCRIPT ... check-list [...]
123 # POLICY-HOOK-SCRIPT ... check-package PACKAGE [...]
124 # POLICY-HOOK-SCRIPT ... push PACKAGE \
125 # VERSION SUITE TAGNAME DELIBERATELIES [...]
126 # POLICY-HOOK-SCRIPT ... push-confirm PACKAGE \
127 # VERSION SUITE TAGNAME DELIBERATELIES FRESH-REPO|'' [...]
129 # DELIBERATELIES is like this: --deliberately-foo,--deliberately-bar,...
131 # Exit status is a bitmask. Bit weight constants are defined in Dgit.pm.
133 # suppress dgit-repos-server's fast-forward check ("push" only)
135 # blow away repo right away (ie, as if before push or fetch)
136 # ("check-package" and "push" only)
137 # any unexpected bits mean failure, and then known set bits are ignored
138 # if no unexpected bits set, operation continues (subject to meaning
139 # of any expected bits set). So, eg, exit 0 means "continue normally"
140 # and would be appropriate for an unknown action.
142 # cwd for push and push-confirm is a temporary repo where the incoming
143 # objects have been received; TAGNAME is the version-based tag.
145 # FRESH-REPO is '' iff the repo for this package already existed, or
146 # the pathname of the newly-created repo which will be renamed into
147 # place if everything goes well. (NB that this is generally not the
148 # same repo as the cwd, because the objects are first received into a
149 # temporary repo so they can be examined.) In this case FRESH-REPO
150 # contains exactly the objects and refs that will appear in the
151 # destination if push-confirm approves.
153 # if push requested FRESHREPO, push-confirm happens in the old working
154 # repo and FRESH-REPO is guaranteed not to be ''.
156 # policy hook for a particular package will be invoked only once at
157 # a time - (see comments about DGIT-REPOS-DIR, above)
159 # check-list and check-package are invoked via the --cron option.
160 # First, without any locking, check-list is called. It should produce
161 # a list of package names (one per line). Then check-package will be
162 # invoked for each named package, in each case after taking an
165 # If policy hook wants to run dgit (or something else in the dgit
166 # package), it should use DGIT-LIVE-DIR/dgit (etc.), or if that is
167 # ENOENT, use the installed version.
171 use Fcntl qw(:flock);
172 use File::Path qw(rmtree);
173 use File::Temp qw(tempfile);
175 use Debian::Dgit qw(:DEFAULT :policyflags);
197 #----- utilities -----
199 sub realdestrepo () { "$dgitrepos/$package.git"; }
201 sub acquirelock ($$) {
202 my ($lock, $must) = @_;
204 printdebug sprintf "locking %s %d\n", $lock, $must;
207 $fh = new IO::File $lock, ">" or die "open $lock: $!";
208 my $ok = flock $fh, $must ? LOCK_EX : (LOCK_EX|LOCK_NB);
210 die "flock $lock: $!" if $must;
211 printdebug " locking $lock failed\n";
214 next unless stat_exists $lock;
215 my $want = (stat _)[1];
217 my $got = (stat _)[1];
218 last if $got == $want;
223 sub acquirermtree ($$) {
224 my ($tree, $must) = @_;
225 my $fh = acquirelock("$tree.lock", $must);
233 sub locksometree ($) {
235 acquirelock("$tree.lock", 1);
238 sub lockrealtree () {
239 locksometree(realdestrepo);
242 sub mkrepotmp () { ensuredir "$dgitrepos/_tmp" };
244 sub removedtagsfile () { "$dgitrepos/_removed-tags/$package"; }
246 sub recorderror ($) {
248 my $w = $ENV{'DGIT_DRS_WORK'}; # we are in stunthook
251 open ERR, ">", "$w/drs-error" or die $!;
252 print ERR $why, "\n" or die $!;
261 recorderror "reject: $why";
262 die "dgit-repos-server: reject: $why\n";
269 die (shellquote @_)." $? $!" if $r;
273 my ($policyallowbits, @polargs) = @_;
274 # => ($exitstatuspolicybitmap);
275 die if $policyallowbits & ~0x3e;
276 my @cmd = ($policyhook,$distro,$dgitrepos,$dgitlive,$distrodir,@polargs);
279 die "system: $!" if $r < 0;
280 die "dgit-repos-server: policy hook failed (or rejected) ($?)\n"
281 if $r & ~($policyallowbits << 8);
282 printdebug sprintf "hook => %#x\n", $r;
286 sub mkemptyrepo ($$) {
287 my ($dir,$sharedperm) = @_;
288 runcmd qw(git init --bare --quiet), "--shared=$sharedperm", $dir;
291 sub mkrepo_fromtemplate ($) {
293 my $template = "$dgitrepos/_template";
294 locksometree($template);
295 printdebug "copy template $template -> $dir\n";
296 my $r = system qw(cp -a --), $template, $dir;
297 !$r or die "create new repo $dir failed: $r $!";
300 sub movetogarbage () {
301 # realdestrepo must have been locked
303 my $real = realdestrepo;
304 return unless stat_exists $real;
306 my $garbagerepo = "$dgitrepos/${package}_garbage";
307 # We arrange to always keep at least one old tree, for recovery
308 # from mistakes. This is either $garbage or $garbage-old.
309 if (stat_exists "$garbagerepo") {
310 printdebug "movetogarbage: rmtree $garbagerepo-tmp\n";
311 rmtree "$garbagerepo-tmp";
312 if (rename "$garbagerepo-old", "$garbagerepo-tmp") {
313 printdebug "movetogarbage: $garbagerepo-old -> -tmp, rmtree\n";
314 rmtree "$garbagerepo-tmp";
316 die "$garbagerepo $!" unless $!==ENOENT;
317 printdebug "movetogarbage: $garbagerepo-old -> -tmp\n";
319 printdebug "movetogarbage: $garbagerepo -> -old\n";
320 rename "$garbagerepo", "$garbagerepo-old" or die "$garbagerepo $!";
323 ensuredir "$dgitrepos/_removed-tags";
324 open PREVIOUS, ">>", removedtagsfile or die removedtagsfile." $!";
325 git_for_each_ref('refs/tags/'.debiantag('*'), sub {
326 my ($objid,$objtype,$fullrefname,$reftail) = @_;
327 print PREVIOUS "\n$objid $reftail .\n" or die $!;
329 close PREVIOUS or die $!;
331 printdebug "movetogarbage: $real -> $garbagerepo\n";
332 rename $real, $garbagerepo
334 or die "$garbagerepo $!";
337 sub policy_checkpackage () {
338 my $lfh = lockrealtree();
340 $policy = policyhook(FRESHREPO,'check-package',$package);
341 if ($policy & FRESHREPO) {
348 #----- git-receive-pack -----
350 sub fixmissing__git_receive_pack () {
352 $destrepo = "$dgitrepos/_tmp/${package}_prospective";
353 acquirermtree($destrepo, 1);
354 mkrepo_fromtemplate($destrepo);
357 sub makeworkingclone () {
359 $workrepo = "$dgitrepos/_tmp/${package}_incoming$$";
360 acquirermtree($workrepo, 1);
361 my $lfh = lockrealtree();
362 runcmd qw(git clone -l -q --mirror), $destrepo, $workrepo;
364 rmtree "${workrepo}_fresh";
367 sub setupstunthook () {
368 my $prerecv = "$workrepo/hooks/pre-receive";
369 my $fh = new IO::File $prerecv, O_WRONLY|O_CREAT|O_TRUNC, 0777
370 or die "$prerecv: $!";
371 print $fh <<END or die "$prerecv: $!";
374 exec $0 --pre-receive-hook $package
376 close $fh or die "$prerecv: $!";
377 $ENV{'DGIT_DRS_WORK'}= $workrepo;
378 $ENV{'DGIT_DRS_DEST'}= $destrepo;
379 printdebug " stunt hook set up $prerecv\n";
382 sub dealwithfreshrepo () {
383 my $freshrepo = "${workrepo}_fresh";
384 return unless stat_exists $freshrepo;
385 $destrepo = $freshrepo;
388 sub maybeinstallprospective () {
389 return if $destrepo eq realdestrepo;
391 if (open REJ, "<", "$workrepo/drs-error") {
394 REJ->error and die $!;
398 $!==&ENOENT or die $!;
401 printdebug " show-ref ($destrepo) ...\n";
403 my $child = open SR, "-|";
404 defined $child or die $!;
406 chdir $destrepo or die $!;
407 exec qw(git show-ref);
410 my %got = qw(tag 0 head 0);
413 printdebug " show-refs| $_\n";
414 s/^\S*[1-9a-f]\S* (\S+)$/$1/ or die;
416 m{^refs/tags/} ? 'tag' :
417 m{^refs/dgit/} ? 'head' :
421 $!=0; $?=0; close SR or $?==256 or die "$? $!";
423 printdebug "installprospective ?\n";
424 die Dumper(\%got)." -- missing refs in new repo"
425 if grep { !$_ } values %got;
429 if ($destrepo eq "${workrepo}_fresh") {
433 printdebug "install $destrepo => ".realdestrepo."\n";
434 rename $destrepo, realdestrepo or die $!;
435 remove realdestrepo.".lock" or die $!;
438 sub main__git_receive_pack () {
441 runcmd qw(git receive-pack), $workrepo;
443 maybeinstallprospective();
446 #----- stunt post-receive hook -----
448 our ($tagname, $tagval, $suite, $oldcommit, $commit);
449 our ($version, %tagh);
451 our ($tagexists_error);
454 printdebug " updates ...\n";
457 printdebug " upd.| $_\n";
458 m/^(\S+) (\S+) (\S+)$/ or die "$_ ?";
459 my ($old, $sha1, $refname) = ($1, $2, $3);
460 if ($refname =~ m{^refs/tags/(?=debian/)}) {
461 reject "pushing multiple tags!" if defined $tagname;
464 $tagexists_error= "tag $tagname already exists -".
465 " not replacing previously-pushed version"
467 } elsif ($refname =~ m{^refs/dgit/}) {
468 reject "pushing multiple heads!" if defined $suite;
473 reject "pushing unexpected ref!";
476 STDIN->error and die $!;
478 reject "push is missing tag ref update" unless defined $tagname;
479 reject "push is missing head ref update" unless defined $suite;
480 printdebug " updates ok.\n";
484 printdebug " parsetag...\n";
485 open PT, ">dgit-tmp/plaintext" or die $!;
486 open DS, ">dgit-tmp/plaintext.asc" or die $!;
487 open T, "-|", qw(git cat-file tag), $tagval or die $!;
489 $!=0; $_=<T>; defined or die $!;
491 if (m/^(\S+) (.*)/) {
492 push @{ $tagh{$1} }, $2;
499 $!=0; $_=<T>; defined or die $!;
500 m/^($package_re) release (\S+) for \S+ \((\S+)\) \[dgit\]$/ or
501 reject "tag message not in expected format";
503 die unless $1 eq $package;
505 die "$3 != $suite " unless $3 eq $suite;
509 print PT $copyl or die $!;
510 $!=0; $_=<T>; defined or die "missing signature? $!";
512 if (m/^\[dgit ([^"].*)\]$/) { # [dgit "something"] is for future
515 if (s/^distro\=(\S+) //) {
516 die "$1 != $distro" unless $1 eq $distro;
517 } elsif (s/^(--deliberately-$deliberately_re) //) {
518 push @deliberatelies, $1;
519 } elsif (s/^previously:(\S+)=(\w+) //) {
520 die "previously $1 twice" if defined $previously{$1};
521 $previously{$1} = $2;
522 } elsif (s/^[-+.=0-9a-z]\S* //) {
524 die "unknown dgit info in tag ($_)";
529 last if m/^-----BEGIN PGP/;
540 printdebug " parsetag ok.\n";
543 sub checksig_keyring ($) {
544 my ($keyringfile) = @_;
545 # returns primary-keyid if signed by a key in this keyring
547 # or dies on other errors
551 printdebug " checksig keyring $keyringfile...\n";
553 our @cmd = (qw(gpgv --status-fd=1 --keyring),
555 qw(dgit-tmp/plaintext.asc dgit-tmp/plaintext));
562 next unless s/^\[GNUPG:\] //;
564 printdebug " checksig| $_\n";
565 my @l = split / /, $_;
566 if ($l[0] eq 'NO_PUBKEY') {
568 } elsif ($l[0] eq 'VALIDSIG') {
570 $sigtype eq '00' or reject "signature is not of type 00!";
572 die unless defined $ok;
578 printdebug sprintf " checksig ok=%d\n", !!$ok;
583 sub dm_txt_check ($$) {
584 my ($keyid, $dmtxtfn) = @_;
585 printdebug " dm_txt_check $keyid $dmtxtfn\n";
586 open DT, '<', $dmtxtfn or die "$dmtxtfn $!";
588 m/^fingerprint:\s+$keyid$/oi
590 if (s/^allow:/ /i..0) {
593 or reject "key $keyid missing Allow section in permissions!";
598 or reject "package $package not allowed for key $keyid";
603 printdebug " dm_txt_check allow| $_\n";
604 foreach my $p (split /\s+/) {
605 if ($p eq $package) {
607 printdebug " dm_txt_check ok\n";
612 DT->error and die $!;
614 reject "key $keyid not in permissions list although in keyring!";
618 foreach my $kas (split /:/, $keyrings) {
619 printdebug "verifytag $kas...\n";
620 $kas =~ s/^([^,]+),// or die;
621 my $keyid = checksig_keyring $1;
622 if (defined $keyid) {
623 if ($kas =~ m/^a$/) {
624 printdebug "verifytag a ok\n";
626 } elsif ($kas =~ m/^m([^,]+)$/) {
627 dm_txt_check($keyid, $1);
628 printdebug "verifytag m ok\n";
635 reject "key not found in keyrings";
639 printdebug "checksuite ($suitesfile)\n";
640 open SUITES, "<", $suitesfile or die $!;
646 return if $_ eq $suite;
648 die $! if SUITES->error;
649 reject "unknown suite";
652 sub checktagnoreplay () {
653 # We need to prevent a replay attack using an earlier signed tag.
654 # We also want to archive in the history the object ids of
655 # anything we remove, even if we get rid of the actual objects.
657 # So, we check that the signed tag mentions the name and tag
660 # (a) In the case of FRESHREPO: all tags and refs/heads/* in
661 # the repo. That is, effectively, all the things we are
664 # This prevents any tag implying a FRESHREPO push
665 # being replayed into a different state of the repo.
667 # There is still the folowing risk: If a non-ff push is of a
668 # head which is an ancestor of a previous ff-only push, the
669 # previous push can be replayed.
671 # So we keep a separate list, as a file in the repo, of all
672 # the tag object ids we have ever seen and removed. Any such
673 # tag object id will be rejected even for ff-only pushes.
675 # (b) In the case of just NOFFCHECK: all tags referring to the
676 # current head for the suite (there must be at least one).
678 # This prevents any tag implying a NOFFCHECK push being
679 # replayed to rewind from a different head.
681 # The possibility of an earlier ff-only push being replayed is
682 # eliminated as follows: the tag from such a push would still
683 # be in our repo, and therefore the replayed push would be
684 # rejected because the set of refs being updated would be
687 if (!open PREVIOUS, "<", removedtagsfile) {
688 die removedtagsfile." $!" unless $!==ENOENT;
690 # Protocol for updating this file is to append to it, not
691 # write-new-and-rename. So all updates are prefixed with \n
692 # and suffixed with " .\n" so that partial writes can be
695 next unless m/^(\w+) (.*) \.\n/;
696 next unless $1 eq $tagval;
697 reject "Replay of previously-rewound upload ($tagval $2)";
699 die removedtagsfile." $!" if PREVIOUS->error;
703 return unless $policy & (FRESHREPO|NOFFCHECK);
705 my $garbagerepo = "$dgitrepos/${package}_garbage";
711 my $check_ref_previously= sub {
712 my ($objid,$objtype,$fullrefname,$reftail) = @_;
713 my $supkey = $fullrefname;
714 $supkey =~ s{^refs/}{} or die "$supkey $objid ?";
715 my $supobjid = $previously{$supkey};
716 if (!defined $supobjid) {
717 printdebug "checktagnoreply - missing\n";
718 push @problems, "does not declare previously $supkey";
719 } elsif ($supobjid ne $objid) {
720 push @problems, "declared previously $supkey=$supobjid".
721 " but actually previously $supkey=$objid";
727 if ($policy & FRESHREPO) {
728 foreach my $kind (qw(tags heads)) {
729 git_for_each_ref("refs/$kind", $check_ref_previously);
732 my $branch= server_branch($suite);
733 my $branchhead= git_get_ref(server_ref($suite));
734 if (!length $branchhead) {
735 # No such branch - NOFFCHECK was unnecessary. Oh well.
736 printdebug "checktagnoreplay - not FRESHREPO, new branch, ok\n";
738 printdebug "checktagnoreplay - not FRESHREPO,".
739 " checking for overwriting refs/$branch=$branchhead\n";
740 git_for_each_tag_referring($branchhead, sub {
741 my ($tagobjid,$refobjid,$fullrefname,$tagname) = @_;
742 $check_ref_previously->($tagobjid,undef,$fullrefname,undef);
744 printdebug "checktagnoreplay - not FRESHREPO, nchecked=$nchecked";
745 push @problems, "does not declare previously any tag".
746 " referring to branch head $branch=$branchhead"
752 reject "replay attack prevention check failed:".
753 " signed tag for $version: ".
754 join("; ", @problems).
757 printdebug "checktagnoreplay - all ok ($tagval)\n"
762 my $vals = $tagh{$tag};
763 reject "missing header $tag in signed tag object" unless $vals;
764 reject "multiple headers $tag in signed tag object" unless @$vals == 1;
769 printdebug "checks\n";
771 tagh1('type') eq 'commit' or reject "tag refers to wrong kind of object";
772 tagh1('object') eq $commit or reject "tag refers to wrong commit";
773 tagh1('tag') eq $tagname or reject "tag name in tag is wrong";
778 printdebug "translated version $v\n";
779 $tagname eq "debian/$v" or die;
783 @policy_args = ($package,$version,$suite,$tagname,
784 join(",",@deliberatelies));
785 $policy = policyhook(NOFFCHECK|FRESHREPO, 'push', @policy_args);
787 if (defined $tagexists_error) {
788 if ($policy & FRESHREPO) {
789 printdebug "ignoring tagexists_error: $tagexists_error\n";
791 reject $tagexists_error;
798 # check that our ref is being fast-forwarded
799 printdebug "oldcommit $oldcommit\n";
800 if (!($policy & NOFFCHECK) && $oldcommit =~ m/[^0]/) {
801 $?=0; $!=0; my $mb = `git merge-base $commit $oldcommit`;
803 $mb eq $oldcommit or reject "not fast forward on dgit branch";
805 if ($policy & FRESHREPO) {
806 # It's a bit late to be discovering this here, isn't it ?
808 # What we do is: Generate a fresh destination repo right now,
809 # and arrange to treat it from now on as if it were a
812 # The presence of this fresh destination repo is detected by
813 # the parent, which responds by making a fresh master repo
814 # from the template. (If the repo didn't already exist then
815 # $destrepo was _prospective, and we change it here. This is
816 # OK because the parent's check for _fresh persuades it not to
819 $destrepo = "${workrepo}_fresh"; # workrepo lock covers
820 mkrepo_fromtemplate $destrepo;
825 my @cmd = (qw(git send-pack), $destrepo);
826 push @cmd, qw(--force) if $policy & NOFFCHECK;
827 push @cmd, "$commit:refs/dgit/$suite",
828 "$tagval:refs/tags/$tagname";
832 !$r or die "onward push to $destrepo failed: $r $!";
835 sub finalisepush () {
836 if ($destrepo eq realdestrepo) {
837 policyhook(0, 'push-confirm', @policy_args, '');
840 # We are to receive the push into a new repo (perhaps
841 # because the policy push hook asked us to with FRESHREPO, or
842 # perhaps because the repo didn't exist before).
844 # We want to provide the policy push-confirm hook with a repo
845 # which looks like the one which is going to be installed.
846 # The working repo is no good because it might contain
849 # So we push the objects into the prospective new repo right
850 # away. If the hook declines, we decline, and the prospective
851 # repo is never installed.
853 policyhook(0, 'push-confirm', @policy_args, $destrepo);
858 printdebug "stunthook in $workrepo\n";
859 chdir $workrepo or die "chdir $workrepo: $!";
860 mkdir "dgit-tmp" or $!==EEXIST or die $!;
866 printdebug "stunthook done.\n";
869 #----- git-upload-pack -----
871 sub fixmissing__git_upload_pack () {
872 $destrepo = "$dgitrepos/_empty";
873 my $lfh = locksometree($destrepo);
874 return if stat_exists $destrepo;
875 rmtree "$destrepo.new";
876 mkemptyrepo "$destrepo.new", "0644";
877 rename "$destrepo.new", $destrepo or die $!;
878 unlink "$destrepo.lock" or die $!;
882 sub main__git_upload_pack () {
883 my $lfh = locksometree($destrepo);
884 printdebug "git-upload-pack in $destrepo\n";
885 chdir $destrepo or die "$destrepo: $!";
887 runcmd qw(git upload-pack), ".";
890 #----- arg parsing and main program -----
900 # keys are used for DGIT_DRS_XXX too
901 'repos' => \$dgitrepos,
902 'suites' => \$suitesfile,
903 'policy-hook' => \$policyhook,
904 'dgit-live' => \$dgitlive,
907 our @hookenvs = qw(distro suitesfile policyhook
908 dgitlive keyrings dgitrepos distrodir);
910 # workrepo and destrepo handled ad-hoc
915 my $cmd = $ENV{'SSH_ORIGINAL_COMMAND'};
925 or reject "command string not understood";
931 my $mainfunc = $main::{"main__$funcn"};
933 reject "unknown method" unless $mainfunc;
935 policy_checkpackage();
937 if (stat_exists realdestrepo) {
938 $destrepo = realdestrepo;
940 printdebug " fixmissing $funcn\n";
941 my $fixfunc = $main::{"fixmissing__$funcn"};
945 printdebug " running main $funcn\n";
952 my $listfh = tempfile();
953 open STDOUT, ">&", $listfh or die $!;
954 policyhook(0,'check-list');
955 open STDOUT, ">&STDERR" or die $!;
957 seek $listfh, 0, 0 or die $!;
962 die unless m/^($package_re)$/;
965 policy_checkpackage();
967 die $! if $listfh->error;
970 sub parseargsdispatch () {
973 delete $ENV{'GIT_DIR'}; # if not run via ssh, our parent git process
974 delete $ENV{'GIT_PREFIX'}; # sets these and they mess things up
976 if ($ENV{'DGIT_DRS_DEBUG'}) {
980 if ($ARGV[0] eq '--pre-receive-hook') {
983 printdebug "in stunthook ".(shellquote @ARGV)."\n";
984 foreach my $k (sort keys %ENV) {
985 printdebug "$k=$ENV{$k}\n" if $k =~ m/^DGIT/;
990 $package = shift @ARGV;
991 ${ $main::{$_} } = $ENV{"DGIT_DRS_\U$_"} foreach @hookenvs;
992 defined($workrepo = $ENV{'DGIT_DRS_WORK'}) or die;
993 defined($destrepo = $ENV{'DGIT_DRS_DEST'}) or die;
994 open STDOUT, ">&STDERR" or die $!;
999 recorderror "$@" or die;
1006 $distrodir = argval();
1007 $keyrings = argval();
1009 foreach my $dk (keys %indistrodir) {
1010 ${ $indistrodir{$dk} } = "$distrodir/$dk";
1013 while (@ARGV && $ARGV[0] =~ m/^--([-0-9a-z]+)=/ && $indistrodir{$1}) {
1014 ${ $indistrodir{$1} } = $'; #';
1018 $ENV{"DGIT_DRS_\U$_"} = ${ $main::{$_} } foreach @hookenvs;
1020 die unless @ARGV==1;
1022 my $mode = shift @ARGV;
1023 die unless $mode =~ m/^--(\w+)$/;
1024 my $fn = ${*::}{"mode_$1"};
1030 while (my $fh = pop @lockfhs) { close $fh; }
1035 if (!chdir "$dgitrepos/_tmp") {
1036 $!==ENOENT or die $!;
1039 foreach my $lf (<*.lock>) {
1041 $tree =~ s/\.lock$//;
1042 next unless acquirermtree($tree, 0);
1043 remove $lf or warn $!;
1048 parseargsdispatch();