#!/usr/bin/perl -w
-# dgit-repos-push-receiver
+# dgit-repos-server
#
# usages:
-# .../dgit-repos-push-receiver SUITES KEYRING-AUTH-SPEC DGIT-REPOS-DIR --ssh
+# .../dgit-repos-server SUITES KEYRING-AUTH-SPEC DGIT-REPOS-DIR --ssh
# internal usage:
-# .../dgit-repos-push-receiver --pre-receive-hook PACKAGE
+# .../dgit-repos-server --pre-receive-hook PACKAGE
#
# Invoked as the ssh restricted command
#
use Fcntl qw(:flock);
use File::Path qw(rmtree);
+open DEBUG, ">/dev/null" or die $!;
+
our $package_re = '[0-9a-z][-+.0-9a-z]+';
our $func;
our $dgitrepos;
-our $pkg;
+our $package;
our $suitesfile;
our $realdestrepo;
our $destrepo;
our $workrepo;
-our @keyrings;
+our $keyrings;
our @lockfhs;
+our $debug='';
#----- utilities -----
+sub debug {
+ print DEBUG "$debug @_\n";
+}
+
sub acquirelock ($$) {
my ($lock, $must) = @_;
my $fh;
+ printf DEBUG "$debug locking %s %d\n", $lock, $must;
for (;;) {
close $fh if $fh;
- $fh = new IO::File, ">", $lock or die "open $lock: $!";
+ $fh = new IO::File $lock, ">" or die "open $lock: $!";
my $ok = flock $fh, $must ? LOCK_EX : (LOCK_EX|LOCK_NB);
if (!$ok) {
- return undef unless $must;
- die "flock $lock: $!";
+ die "flock $lock: $!" if $must;
+ debug " locking $lock failed";
+ return undef;
}
if (!stat $lock) {
next if $! == ENOENT;
return $fh;
}
+sub mkrepotmp () {
+ my $tmpdir = "$dgitrepos/_tmp";
+ return if mkdir $tmpdir;
+ return if $! == EEXIST;
+ die $!;
+}
+
+sub recorderror ($) {
+ my ($why) = @_;
+ my $w = $ENV{'DGIT_DRS_WORK'}; # we are in stunthook
+ if (defined $w) {
+ chomp $why;
+ open ERR, ">", "$w/drs-error" or die $!;
+ print ERR $why, "\n" or die $!;
+ close ERR or die $!;
+ return 1;
+ }
+ return 0;
+}
+
sub reject ($) {
- die "dgit-repos-server: reject: $_[0]\n";
+ my ($why) = @_;
+ recorderror "reject: $why";
+ die "dgit-repos-server: reject: $why\n";
+}
+
+sub debugcmd {
+ if ($debug) {
+ use Data::Dumper;
+ local $Data::Dumper::Indent = 0;
+ local $Data::Dumper::Terse = 1;
+ debug "|".Dumper(\@_);
+ }
+}
+
+sub runcmd {
+ debugcmd @_;
+ $!=0; $?=0;
+ my $r = system @_;
+ die "@_ $? $!" if $r;
}
#----- git-receive-pack -----
sub fixmissing__git_receive_pack () {
- $destrepo = "$dgitrepos/_tmp/${pkg}_prospective";
+ mkrepotmp();
+ $destrepo = "$dgitrepos/_tmp/${package}_prospective";
acquiretree($destrepo, 1);
- my $r = system qw(cp -a --), "$dgitrepos/_template", "$destrepo";
+ my $template = "$dgitrepos/_template";
+ debug "fixmissing copy tempalate $template -> $destrepo";
+ my $r = system qw(cp -a --), $template, $destrepo;
!$r or die "create new repo failed failed: $r $!";
}
sub makeworkingclone () {
- $workrepo = "$dgitrepos/_tmp/${pkg}_incoming$$";
+ mkrepotmp();
+ $workrepo = "$dgitrepos/_tmp/${package}_incoming$$";
acquiretree($workrepo, 1);
runcmd qw(git clone -l -q --mirror), $destrepo, $workrepo;
}
sub setupstunthook () {
my $prerecv = "$workrepo/hooks/pre-receive";
- my $fh = new IO::File, $prerecv, O_WRONLY|O_CREAT|O_TRUNC, 0777
+ my $fh = new IO::File $prerecv, O_WRONLY|O_CREAT|O_TRUNC, 0777
or die "$prerecv: $!";
print $fh <<END or die "$prerecv: $!";
#!/bin/sh
set -e
-exec $0 --pre-receive-hook $pkg
+exec $0 --pre-receive-hook $package
END
close $fh or die "$prerecv: $!";
- $ENV{'DGIT_RPR_WORK'}= $workrepo;
- $ENV{'DGIT_RPR_DEST'}= $destrepo;
+ $ENV{'DGIT_DRS_WORK'}= $workrepo;
+ $ENV{'DGIT_DRS_DEST'}= $destrepo;
+ debug " stunt hook set up $prerecv";
}
sub maybeinstallprospective () {
return if $destrepo eq $realdestrepo;
+ if (open REJ, "<", "$workrepo/drs-error") {
+ local $/ = undef;
+ my $msg = <REJ>;
+ REJ->error and die $!;
+ print STDERR $msg;
+ exit 1;
+ } else {
+ $!==&ENOENT or die $!;
+ }
+
+ debug " show-ref ($destrepo) ...";
+
my $child = open SR, "-|";
defined $child or die $!;
if (!$child) {
my %got = qw(tag 0 head 0);
while (<SR>) {
chomp or die;
+ debug " show-refs| $_";
s/^\S*[1-9a-f]\S* (\S+)$/$1/ or die;
my $wh =
m{^refs/tags/} ? 'tag' :
die;
die if $got{$wh}++;
}
- die if grep { !$_ } values %got;
- $!=0; $?=0; close SR or die "$? $!";
+ $!=0; $?=0; close SR or $?==256 or die "$? $!";
+
+ debug "installprospective ?";
+ die Dumper(\%got)." -- missing refs in new repo"
+ if grep { !$_ } values %got;
+ debug "install $destrepo => $realdestrepo";
rename $destrepo, $realdestrepo or die $!;
remove "$destrepo.lock" or die $!;
}
sub main__git_receive_pack () {
makeworkingclone();
setupstunthook();
- runcmd qw(git receive-pack), $destdir;
+ runcmd qw(git receive-pack), $workrepo;
maybeinstallprospective();
}
our ($version, %tagh);
sub readupdates () {
+ debug " updates ...";
while (<STDIN>) {
+ chomp or die;
+ debug " upd.| $_";
m/^(\S+) (\S+) (\S+)$/ or die "$_ ?";
my ($old, $sha1, $refname) = ($1, $2, $3);
if ($refname =~ m{^refs/tags/(?=debian/)}) {
- die if defined $tagname;
+ reject "pushing multiple tags!" if defined $tagname;
$tagname = $'; #';
$tagval = $sha1;
reject "tag $tagname already exists -".
" not replacing previously-pushed version"
if $old =~ m/[^0]/;
} elsif ($refname =~ m{^refs/dgit/}) {
- die if defined $suite;
+ reject "pushing multiple heads!" if defined $suite;
$suite = $'; #';
$oldcommit = $old;
$commit = $sha1;
} else {
- die;
+ reject "pushing unexpected ref!";
}
}
STDIN->error and die $!;
- die unless defined $refname;
- die unless defined $branchname;
+ reject "push is missing tag ref update" unless defined $tagname;
+ reject "push is missing head ref update" unless defined $suite;
+ debug " updates ok.";
}
sub parsetag () {
+ debug " parsetag...";
open PT, ">dgit-tmp/plaintext" or die $!;
open DS, ">dgit-tmp/plaintext.asc" or die $!;
open T, "-|", qw(git cat-file tag), $tagval or die $!;
}
}
$!=0; $_=<T>; defined or die $!;
- m/^($package_re) release (\S+) for (\S+) \[dgit\]$/ or die;
+ m/^($package_re) release (\S+) for \S+ \((\S+)\) \[dgit\]$/ or
+ reject "tag message not in expected format";
- die unless $1 eq $pkg;
+ die unless $1 eq $package;
$version = $2;
- die unless $3 eq $suite;
+ die "$3 != $suite " unless $3 eq $suite;
for (;;) {
print PT or die $!;
- $!=0; $_=<T>; defined or die $!;
+ $!=0; $_=<T>; defined or die "missing signature? $!";
last if m/^-----BEGIN PGP/;
}
for (;;) {
T->error and die $!;
close PT or die $!;
close DS or die $!;
+ debug " parsetag ok.";
}
sub checksig_keyring ($) {
my $ok = undef;
- open P, "-|", (qw(gpgv --status-fd=1),
- map { '--keyring', $_ }, @keyrings,
- qw(dgit-tmp/plaintext.asc dgit-tmp/plaintext))
+ debug " checksig keyring $keyringfile...";
+
+ our @cmd = (qw(gpgv --status-fd=1 --keyring),
+ $keyringfile,
+ qw(dgit-tmp/plaintext.asc dgit-tmp/plaintext));
+ debugcmd @cmd;
+
+ open P, "-|", @cmd
or die $!;
while (<P>) {
- next unless s/^\[GNUPG:\]: //;
+ next unless s/^\[GNUPG:\] //;
chomp or die;
+ debug " checksig| $_";
my @l = split / /, $_;
if ($l[0] eq 'NO_PUBKEY') {
last;
}
close P;
+ debug sprintf " checksig ok=%d", !!$ok;
+
return $ok;
}
sub dm_txt_check ($$) {
my ($keyid, $dmtxtfn) = @_;
+ debug " dm_txt_check $keyid $dmtxtfn";
open DT, '<', $dmtxtfn or die "$dmtxtfn $!";
while (<DT>) {
m/^fingerprint:\s+$keyid$/oi
..0 or next;
- m/^\S/
- or reject "key $keyid missing Allow section in permissions!";
+ if (s/^allow:/ /i..0) {
+ } else {
+ m/^./
+ or reject "key $keyid missing Allow section in permissions!";
+ next;
+ }
# in right stanza...
- s/^allow:/ /i
- ..0 or next;
- s/^\s+//
+ s/^[ \t]+//
or reject "package $package not allowed for key $keyid";
# in allow field...
s/\([^()]+\)//;
s/\,//;
+ chomp or die;
+ debug " dm_txt_check allow| $_";
foreach my $p (split /\s+/) {
- return if $p eq $package; # yay!
+ if ($p eq $package) {
+ # yay!
+ debug " dm_txt_check ok";
+ return;
+ }
}
}
DT->error and die $!;
sub verifytag () {
foreach my $kas (split /:/, $keyrings) {
+ debug "verifytag $kas...";
$kas =~ s/^([^,]+),// or die;
my $keyid = checksig_keyring $1;
if (defined $keyid) {
if ($kas =~ m/^a$/) {
+ debug "verifytag a ok";
return; # yay
} elsif ($kas =~ m/^m([^,]+)$/) {
dm_txt_check($keyid, $1);
+ debug "verifytag m ok";
return;
} else {
die;
}
sub checksuite () {
+ debug "checksuite ($suitesfile)";
open SUITES, "<", $suitesfile or die $!;
while (<SUITES>) {
chomp;
reject "unknown suite";
}
+sub tagh1 ($) {
+ my ($tag) = @_;
+ my $vals = $tagh{$tag};
+ reject "missing header $tag in signed tag object" unless $vals;
+ reject "multiple headers $tag in signed tag object" unless @$vals == 1;
+ return $vals->[0];
+}
+
sub checks () {
+ debug "checks";
checksuite();
- tagh1('type') eq 'commit' or die;
- tagh1('object') eq $commit or die;
- tagh1('tag') eq $tagname or die;
+ tagh1('type') eq 'commit' or reject "tag refers to wrong kind of object";
+ tagh1('object') eq $commit or reject "tag refers to wrong commit";
+ tagh1('tag') eq $tagname or reject "tag name in tag is wrong";
my $v = $version;
$v =~ y/~:/_%/;
+
+ debug "translated version $v";
$tagname eq "debian/$v" or die;
# check that our ref is being fast-forwarded
+ debug "oldcommit $oldcommit";
if ($oldcommit =~ m/[^0]/) {
$?=0; $!=0; my $mb = `git merge-base $commit $oldcommit`;
chomp $mb;
}
sub onwardpush () {
+ my @cmd = (qw(git send-pack), $destrepo,
+ "$commit:refs/dgit/$suite",
+ "$tagval:refs/tags/$tagname");
+ debugcmd @cmd;
$!=0;
- my $r = system (qw(git send-pack),
- $destrepo,
- "$commit:refs/dgit/$suite",
- "$tagval:refs/tags/$tagname");
+ my $r = system @cmd;
!$r or die "onward push failed: $r $!";
}
sub stunthook () {
+ debug "stunthook";
chdir $workrepo or die "chdir $workrepo: $!";
mkdir "dgit-tmp" or $!==EEXIST or die $!;
readupdates();
verifytag();
checks();
onwardpush();
+ debug "stunthook done.";
+}
+
+#----- git-upload-pack -----
+
+sub fixmissing__git_upload_pack () {
+ $destrepo = "$dgitrepos/_empty";
+ my $lfh = acquiretree($destrepo,1);
+ return if stat $destrepo;
+ die $! unless $!==ENOENT;
+ rmtree "$destrepo.new";
+ umask 022;
+ runcmd qw(git init --bare --quiet), "$destrepo.new";
+ rename "$destrepo.new", $destrepo or die $!;
+ unlink "$destrepo.lock" or die $!;
+ close $lfh;
+}
+
+sub main__git_upload_pack () {
+ runcmd qw(git upload-pack), $destrepo;
}
#----- arg parsing and main program -----
sub parseargsdispatch () {
die unless @ARGV;
+ delete $ENV{'GIT_DIR'}; # if not run via ssh, our parent git process
+ delete $ENV{'GIT_PREFIX'}; # sets these and they mess things up
+
+ if ($ENV{'DGIT_DRS_DEBUG'}) {
+ $debug='=';
+ open DEBUG, ">&STDERR" or die $!;
+ }
+
if ($ARGV[0] eq '--pre-receive-hook') {
+ if ($debug) { $debug.="="; }
shift @ARGV;
@ARGV == 1 or die;
- $pkg = shift @ARGV;
- defined($suitesfile = $ENV{'DGIT_RPR_SUITES'}) or die;
- defined($workrepo = $ENV{'DGIT_RPR_WORK'}) or die;
- defined($destrepo = $ENV{'DGIT_RPR_DEST'}) or die;
- defined($keyrings = $ENV{'DGIT_RPR_KEYRINGS'}) or die $!;
+ $package = shift @ARGV;
+ defined($suitesfile = $ENV{'DGIT_DRS_SUITES'}) or die;
+ defined($workrepo = $ENV{'DGIT_DRS_WORK'}) or die;
+ defined($destrepo = $ENV{'DGIT_DRS_DEST'}) or die;
+ defined($keyrings = $ENV{'DGIT_DRS_KEYRINGS'}) or die $!;
open STDOUT, ">&STDERR" or die $!;
- stunthook();
+ eval {
+ stunthook();
+ };
+ if ($@) {
+ recorderror "$@" or die;
+ die $@;
+ }
exit 0;
}
- $ENV{'DGIT_RPR_SUITES'} = argval();
- $ENV{'DGIT_RPR_KEYRINGS'} = argval();
+ $ENV{'DGIT_DRS_SUITES'} = argval();
+ $ENV{'DGIT_DRS_KEYRINGS'} = argval();
$dgitrepos = argval();
die unless @ARGV==1 && $ARGV[0] eq '--ssh';
my $cmd = $ENV{'SSH_ORIGINAL_COMMAND'};
$cmd =~ m{
^
- (?:\S*/)?
- ([-0-9a-z]+)
+ (?: \S* / )?
+ ( [-0-9a-z]+ )
\s+
- (?:\S*/)?
- ($package_re)\.git
+ (?: \S* / )?
+ ($package_re) \.git
$
}ox
or reject "command string not understood";
- $method = $1;
- $pkg = $2;
- $realdestrepo = "$dgitrepos/$pkg.git";
+ my $method = $1;
+ $package = $2;
+ $realdestrepo = "$dgitrepos/$package.git";
my $funcn = $method;
$funcn =~ y/-/_/;
$destrepo = $realdestrepo;
} else {
$! == ENOENT or die "stat dest repo $destrepo: $!";
+ debug " fixmissing $funcn";
my $fixfunc = $main::{"fixmissing__$funcn"};
&$fixfunc;
}
+ debug " running main $funcn";
&$mainfunc;
}
sub unlockall () {
- while (my $fh = pop $lockfhs) { close $fh; }
+ while (my $fh = pop @lockfhs) { close $fh; }
}
sub cleanup () {
unlockall();
- chdir "$dgitrepos/_tmp" or die $!;
- foreach my $lock (<*.lock>) {
+ if (!chdir "$dgitrepos/_tmp") {
+ $!==ENOENT or die $!;
+ return;
+ }
+ foreach my $lf (<*.lock>) {
my $tree = $lf;
$tree =~ s/\.lock$//;
next unless acquiretree($tree, 0);
- remove $lock or warn $!;
+ remove $lf or warn $!;
unlockall();
}
}
~ianmdlvl / dgit.git / blobdiff