#!/usr/bin/perl -w
# dgit-repos-server
#
+# git protocol proxy to check dgit pushes etc.
+#
+# Copyright (C) 2014-2016 Ian Jackson
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
# usages:
# dgit-repos-server DISTRO DISTRO-DIR AUTH-SPEC [<settings>] --ssh
# dgit-repos-server DISTRO DISTRO-DIR AUTH-SPEC [<settings>] --cron
# --suites=SUITES-FILE default DISTRO-DIR/suites
# --suites-master=SUITES-FILE default DISTRO-DIR/suites-master
# --policy-hook=POLICY-HOOK default DISTRO-DIR/policy-hook
+# --mirror-hook=MIRROR-HOOK default DISTRO-DIR/mirror-hook
# --dgit-live=DGIT-LIVE-DIR default DISTRO-DIR/dgit-live
-# (DISTRO-DIR is not used other than as default and to pass to policy hook)
+# (DISTRO-DIR is not used other than as default and to pass to policy
+# and mirror hooks)
# internal usage:
# .../dgit-repos-server --pre-receive-hook PACKAGE
#
# (With --cron AUTH-SPEC is not used and may be the empty string.)
use strict;
-$SIG{__WARN__} = sub { die $_[0]; };
+
+use Debian::Dgit::Infra; # must precede Debian::Dgit; - can change @INC!
+use Debian::Dgit qw(:DEFAULT :policyflags);
+setup_sigwarn();
# DGIT-REPOS-DIR contains:
# git tree (or other object) lock (in acquisition order, outer first)
# as a result of this the stunt pre-receive hook runs; it does this:
# + understand what refs we are allegedly updating and
# check some correspondences:
-# * we are updating only refs/tags/DISTRO/* and refs/dgit/*
+# * we are updating only refs/tags/[archive/]DISTRO/* and refs/dgit/*
# * and only one of each
# * and the tag does not already exist
# and
# * the signed tag must refer to a commit
# * the signed tag commit must be the refs/dgit value
# * the name in the signed tag must correspond to its ref name
-# * the tag name must be debian/<version> (massaged as needed)
+# * the tag name must be [archive/]debian/<version> (massaged as needed)
# * the suite is one of those permitted
# * the signed tag has a suitable name
# * run the "push" policy hook
# a stampfile whose presence indicates that there may be
# cleanup to do
#
-# Policy hook script is invoked like this:
+# Policy hook scripts are invoked like this:
# POLICY-HOOK-SCRIPT DISTRO DGIT-REPOS-DIR DGIT-LIVE-DIR DISTRO-DIR ACTION...
# ie.
# POLICY-HOOK-SCRIPT ... check-list [...]
#
# DELIBERATELIES is like this: --deliberately-foo,--deliberately-bar,...
#
-# Exit status is a bitmask. Bit weight constants are defined in Dgit.pm.
+# Exit status of policy hook is a bitmask.
+# Bit weight constants are defined in Dgit.pm.
# NOFFCHECK (2)
# suppress dgit-repos-server's fast-forward check ("push" only)
# FRESHREPO (4)
# blow away repo right away (ie, as if before push or fetch)
# ("check-package" and "push" only)
+# NOCOMMITCHECK (8)
+# suppress dgit-repos-server's check that commits do
+# not lack "committer" info (eg as produced by #849041)
# any unexpected bits mean failure, and then known set bits are ignored
# if no unexpected bits set, operation continues (subject to meaning
# of any expected bits set). So, eg, exit 0 means "continue normally"
# If policy hook wants to run dgit (or something else in the dgit
# package), it should use DGIT-LIVE-DIR/dgit (etc.), or if that is
# ENOENT, use the installed version.
-
+#
+# Mirror hook scripts are invoked like this:
+# MIRROR-HOOK-SCRIPT DISTRO-DIR ACTION...
+# and currently there is only one action invoked by dgit-repos-server:
+# MIRROR-HOOK-SCRIPT DISTRO-DIR updated-hook PACKAGE [...]
+#
+# Exit status of the mirror hook is advisory only. The mirror hook
+# runs too late to do anything useful about a problem, so the only
+# effect of a mirror hook exiting nonzero is a warning message to
+# stderr (which the pushing user should end up seeing).
+#
+# If the mirror hook does not exist, it is silently skipped.
use POSIX;
use Fcntl qw(:flock);
use File::Path qw(rmtree);
use File::Temp qw(tempfile);
-use Debian::Dgit qw(:DEFAULT :policyflags);
-
initdebug('');
our $func;
our $suitesfile;
our $suitesformasterfile;
our $policyhook;
+our $mirrorhook;
our $dgitlive;
our $distrodir;
our $destrepo;
# => ($exitstatuspolicybitmap);
die if $policyallowbits & ~0x3e;
my @cmd = ($policyhook,$distro,$dgitrepos,$dgitlive,$distrodir,@polargs);
- debugcmd '+',@cmd;
+ debugcmd '+M',@cmd;
my $r = system @cmd;
die "system: $!" if $r < 0;
die "dgit-repos-server: policy hook failed (or rejected) ($?)\n"
ensuredir "$dgitrepos/_removed-tags";
open PREVIOUS, ">>", removedtagsfile or die removedtagsfile." $!";
- git_for_each_ref('refs/tags/'.debiantag('*',$distro), sub {
+ git_for_each_ref([ map { 'refs/tags/'.$_ } debiantags('*',$distro) ],
+ sub {
my ($objid,$objtype,$fullrefname,$reftail) = @_;
print PREVIOUS "\n$objid $reftail .\n" or die $!;
}, $real);
$destrepo = $freshrepo;
}
+sub mirrorhook {
+ my @cmd = ($mirrorhook,$distrodir,@_);
+ debugcmd '+',@cmd;
+ return unless stat_exists $mirrorhook;
+ my $r = system @cmd;
+ if ($r) {
+ printf STDERR <<END,
+dgit-repos-server: warning: mirror hook failed: %s
+dgit-repos-server: push complete but may not fully visible.
+END
+ ($r < 0 ? "exec: $!" :
+ $r == (124 << 8) ? "exited status 124 (timeout?)" :
+ !($r & ~0xff00) ? "exited ".($? >> 8) :
+ "wait status $?");
+ }
+}
+
sub maybeinstallprospective () {
return if $destrepo eq realdestrepo;
exec qw(git show-ref);
die $!;
}
- my %got = qw(tag 0 head 0);
+ my %got = qw(newtag 0 omtag 0 head 0);
while (<SR>) {
chomp or die;
printdebug " show-refs| $_\n";
s/^\S*[1-9a-f]\S* (\S+)$/$1/ or die;
next if m{^refs/heads/master$};
my $wh =
- m{^refs/tags/} ? 'tag' :
+ m{^refs/tags/archive/} ? 'newtag' :
+ m{^refs/tags/} ? 'omtag' :
m{^refs/dgit/} ? 'head' :
die;
+ use Data::Dumper;
die if $got{$wh}++;
}
$!=0; $?=0; close SR or $?==256 or die "$? $!";
printdebug "installprospective ?\n";
die Dumper(\%got)." -- missing refs in new repo"
- if grep { !$_ } values %got;
+ unless $got{head} && grep { m/tag$/ && $got{$_} } keys %got;
lockrealtree();
runcmd qw(git receive-pack), $workrepo;
dealwithfreshrepo();
maybeinstallprospective();
+ mirrorhook('updated-hook', $package);
}
#----- stunt post-receive hook -----
our ($tagname, $tagval, $suite, $oldcommit, $commit);
our ($version, %tagh);
+our ($maint_tagname, $maint_tagval);
our ($tagexists_error);
sub readupdates () {
printdebug " updates ...\n";
+ my %tags;
while (<STDIN>) {
chomp or die;
printdebug " upd.| $_\n";
m/^(\S+) (\S+) (\S+)$/ or die "$_ ?";
my ($old, $sha1, $refname) = ($1, $2, $3);
- if ($refname =~ m{^refs/tags/(?=$distro/)}) {
- reject "pushing multiple tags!" if defined $tagname;
- $tagname = $'; #';
- $tagval = $sha1;
- $tagexists_error= "tag $tagname already exists -".
+ if ($refname =~ m{^refs/tags/(?=(?:archive/)?$distro/)}) {
+ my $tn = $'; #';
+ $tags{$tn} = $sha1;
+ $tagexists_error= "tag $tn already exists -".
" not replacing previously-pushed version"
if $old =~ m/[^0]/;
} elsif ($refname =~ m{^refs/dgit/}) {
}
STDIN->error and die $!;
- reject "push is missing tag ref update" unless defined $tagname;
+ reject "push is missing tag ref update" unless %tags;
+ my @newtags = grep { m#^archive/# } keys %tags;
+ my @omtags = grep { !m#^archive/# } keys %tags;
+ reject "pushing too many similar tags" if @newtags>1 || @omtags>1;
+ if (@newtags) {
+ ($tagname) = @newtags;
+ ($maint_tagname) = @omtags;
+ } else {
+ ($tagname) = @omtags or die;
+ }
+ $tagval = $tags{$tagname};
+ $maint_tagval = $tags{$maint_tagname // ''};
+
reject "push is missing head ref update" unless defined $suite;
printdebug " updates ok.\n";
}
printdebug " dm_txt_check $keyid $dmtxtfn\n";
open DT, '<', $dmtxtfn or die "$dmtxtfn $!";
while (<DT>) {
- m/^fingerprint:\s+$keyid$/oi
+ m/^fingerprint:\s+\Q$keyid\E$/oi
..0 or next;
if (s/^allow:/ /i..0) {
} else {
tagh1('object') eq $commit or reject "tag refers to wrong commit";
tagh1('tag') eq $tagname or reject "tag name in tag is wrong";
- my $expecttagname = debiantag $version, $distro;
- printdebug "expected tag $expecttagname\n";
- $tagname eq $expecttagname or die;
+ my @expecttagnames = debiantags($version, $distro);
+ printdebug "expected tag @expecttagnames\n";
+ grep { $tagname eq $_ } @expecttagnames or die;
+
+ foreach my $othertag (grep { $_ ne $tagname } @expecttagnames) {
+ reject "tag $othertag (pushed with differing dgit version)".
+ " already exists -".
+ " not replacing previously-pushed version"
+ if git_get_ref "refs/tags/".$othertag;
+ }
lockrealtree();
chomp $mb;
$mb eq $oldcommit or reject "not fast forward on dgit branch";
}
+
+ # defend against commits generated by #849041
+ if (!($policy & NOCOMMITCHECK)) {
+ my @checks = qw(%an %ae %at
+ %cn %ce %ct);
+ my @chk = qw(git log -z);
+ push @chk, '--pretty=tformat:%H%n'.
+ (join "", map { $_, '%n' } @checks);
+ push @chk, "^$oldcommit" if $oldcommit =~ m/[^0]/;
+ push @chk, $commit;;
+ printdebug " ~NOCOMMITCHECK @chk\n";
+ open CHK, "-|", @chk or die $!;
+ local $/ = "\0";
+ while (<CHK>) {
+ next unless m/^$/m;
+ m/^\w+(?=\n)/ or die;
+ reject "corrupted object $& (missing metadata)";
+ }
+ $!=0; $?=0; close CHK or $?==256 or die "$? $!";
+ }
+
if ($policy & FRESHREPO) {
# It's a bit late to be discovering this here, isn't it ?
#
my @cmd = @cmdbase;
push @cmd, "$commit:refs/dgit/$suite",
"$tagval:refs/tags/$tagname";
+ push @cmd, "$maint_tagval:refs/tags/$maint_tagname"
+ if defined $maint_tagname;
debugcmd '+',@cmd;
$!=0;
my $r = system @cmd;
'suites' => \$suitesfile,
'suites-master' => \$suitesformasterfile,
'policy-hook' => \$policyhook,
+ 'mirror-hook' => \$mirrorhook,
'dgit-live' => \$dgitlive,
);
our @hookenvs = qw(distro suitesfile suitesformasterfile policyhook
- dgitlive keyrings dgitrepos distrodir);
+ mirrorhook dgitlive keyrings dgitrepos distrodir);
# workrepo and destrepo handled ad-hoc
~ianmdlvl / dgit.git / blobdiff