# dgit-repos-server
#
# usages:
-# .../dgit-repos-server DISTRO SUITES KEYRING-AUTH-SPEC \
-# DGIT-REPOS-DIR POLICY-HOOK-SCRIPT --ssh
+# dgit-repos-server DISTRO DISTRO-DIR AUTH-SPEC [<settings>] --ssh
+# dgit-repos-server DISTRO DISTRO-DIR AUTH-SPEC [<settings>] --cron
+# settings
+# --repos=GIT-REPOS-DIR default DISTRO-DIR/repos/
+# --suites=SUITES-FILE default DISTRO-DIR/suites
+# --policy-hook=POLICY-HOOK default DISTRO-DIR/policy-hook
+# (DISTRO-DIR is not used other than as default)
# internal usage:
# .../dgit-repos-server --pre-receive-hook PACKAGE
#
# SUITES is the name of a file which lists the permissible suites
# one per line (#-comments and blank lines ignored)
#
-# KEYRING-AUTH-SPEC is a :-separated list of
+# AUTH-SPEC is a :-separated list of
# KEYRING.GPG,AUTH-SPEC
# where AUTH-SPEC is one of
# a
# mDM.TXT
use strict;
+$SIG{__WARN__} = sub { die $_[0]; };
# DGIT-REPOS-DIR contains:
# git tree (or other object) lock (in acquisition order, outer first)
# PACKAGE_garbage } (also covers executions of
# PACKAGE_garbage-old } policy hook script for PACKAGE)
# PACKAGE_garbage-tmp }
+# policy* } (for policy hook script, covered by
+# } lock only when invoked for a package)
#
# leaf locks, held during brief operaton only:
#
# the corresponding temporary tree, as the lockfile is also
# a stampfile whose presence indicates that there may be
# cleanup to do
+#
+# Policy hook script is invoked like this:
+# POLICY-HOOK-SCRIPT DISTRO DGIT-REPOS-DIR ACTION...
+# ie.
+# POLICY-HOOK-SCRIPT ... check-list [...]
+# POLICY-HOOK-SCRIPT ... check-package PACKAGE [...]
+# POLICY-HOOK-SCRIPT ... push|push-confirm PACKAGE \
+# VERSION SUITE TAGNAME DELIBERATELIES [...]
+#
+# Exit status 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)
+# 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"
+# and would be appropriate for an unknown action.
+#
+# cwd for push and push-confirm is a temporary repo where the
+# to-be-pushed objects have been received; TAGNAME is the
+# version-based tag
+#
+# if push requested FRESHREPO, push-confirm happens in said fresh repo
+#
+# policy hook for a particular package will be invoked only once at
+# a time - (see comments about DGIT-REPOS-DIR, above)
+#
+# check-list and check-package are invoked via the --cron option.
+# First, without any locking, check-list is called. It should produce
+# a list of package names. Then check-package will be invoked for
+# each named package, in each case after taking an appropriate lock.
+
use POSIX;
use Fcntl qw(:flock);
our $func;
our $dgitrepos;
our $package;
+our $distro;
our $suitesfile;
our $policyhook;
-our $realdestrepo;
our $destrepo;
our $workrepo;
our $keyrings;
print DEBUG "$debug @_\n";
}
+sub realdestrepo () { "$dgitrepos/$package.git"; }
+
sub acquirelock ($$) {
my ($lock, $must) = @_;
my $fh;
return $fh;
}
-sub acquiretree ($$) {
+sub acquirermtree ($$) {
my ($tree, $must) = @_;
my $fh = acquirelock("$tree.lock", $must);
if ($fh) {
return $fh;
}
+sub locksometree ($) {
+ my ($tree) = @_;
+ acquirelock("$tree.lock", 1);
+}
+
+sub lockrealtree () {
+ locksometree(realdestrepo);
+}
+
sub mkrepotmp () {
my $tmpdir = "$dgitrepos/_tmp";
return if mkdir $tmpdir;
sub policyhook {
my ($policyallowbits, @polargs) = @_;
- # => ($exitstatuspolicybitmap, $policylockfh);
+ # => ($exitstatuspolicybitmap);
die if $policyallowbits & ~0x3e;
- my @cmd = ($policyhook,$distro,$repos,@polargs);
- debugcmd @_;
- my $r = system @_;
+ my @cmd = ($policyhook,$distro,$dgitrepos,@polargs);
+ debugcmd @cmd;
+ my $r = system @cmd;
die "system: $!" if $r < 0;
die "hook (@cmd) failed ($?)" if $r & ~($policyallowbits << 8);
return $r >> 8;
sub mkrepo_fromtemplate ($) {
my ($dir) = @_;
my $template = "$dgitrepos/_template";
- acquiretree($template,1);
+ locksometree($template);
debug "copy template $template -> $dir";
my $r = system qw(cp -a --), $template, $dir;
!$r or die "create new repo $dir failed: $r $!";
}
sub movetogarbage () {
- # $realdestrepo must have been locked
+ # realdestrepo must have been locked
my $garbagerepo = "$dgitrepos/${package}_garbage";
# We arrange to always keep at least one old tree, for anti-rewind
# purposes (and, I guess, recovery from mistakes). This is either
}
rename "$garbagerepo", "$garbagerepo-old" or die "$garbagerepo $!";
}
- rename $realdestrepo, $garbagerepo
+ rename realdestrepo, $garbagerepo
or $! == ENOENT
or die "$garbagerepo $!";
}
-sub onwardpush () {
- my @cmd = (qw(git send-pack), $destrepo);
- push @cmd, qw(--force) if $policy & NOFFCHECK;
- push @cmd, "$commit:refs/dgit/$suite",
- "$tagval:refs/tags/$tagname");
- debugcmd @cmd;
- $!=0;
- my $r = system @cmd;
- !$r or die "onward push to $destrepo failed: $r $!";
-}
-
#----- git-receive-pack -----
sub fixmissing__git_receive_pack () {
mkrepotmp();
$destrepo = "$dgitrepos/_tmp/${package}_prospective";
- acquiretree($destrepo, 1);
+ acquirermtree($destrepo, 1);
mkrepo_fromtemplate($destrepo);
}
sub makeworkingclone () {
mkrepotmp();
$workrepo = "$dgitrepos/_tmp/${package}_incoming$$";
- acquiretree($workrepo, 1);
- my $lfh = acquiretree($realdestrepo, 1);
+ acquirermtree($workrepo, 1);
+ my $lfh = lockrealtree();
runcmd qw(git clone -l -q --mirror), $destrepo, $workrepo;
close $lfh;
rmtree "${workrepo}_fresh";
}
sub maybeinstallprospective () {
- return if $destrepo eq $realdestrepo;
+ return if $destrepo eq realdestrepo;
if (open REJ, "<", "$workrepo/drs-error") {
local $/ = undef;
die Dumper(\%got)." -- missing refs in new repo"
if grep { !$_ } values %got;
- acquiretree($realdestrepo,1);
+ lockrealtree();
if ($destrepo eq "${workrepo}_fresh") {
movetogarbage;
}
- debug "install $destrepo => $realdestrepo";
- rename $destrepo, $realdestrepo or die $!;
+ debug "install $destrepo => ".realdestrepo;
+ rename $destrepo, realdestrepo or die $!;
remove "$destrepo.lock" or die $!;
}
$version = $2;
die "$3 != $suite " unless $3 eq $suite;
+ my $copyl = $_;
for (;;) {
- print PT or die $!;
+ print PT $copyl or die $!;
$!=0; $_=<T>; defined or die "missing signature? $!";
+ $copyl = $_;
if (m/^\[dgit ([^"].*)\]$/) { # [dgit "something"] is for future
$_ = $1." ";
- for (;;) {
+ while (length) {
if (s/^distro\=(\S+) //) {
die "$1 != $distro" unless $1 eq $distro;
} elsif (s/^(--deliberately-$package_re) //) {
$supersedes{$1} = $2;
} elsif (s/^[-+.=0-9a-z]\S* //) {
} else {
- die "unknown dgit info in tag";
+ die "unknown dgit info in tag ($_)";
}
}
next;
}
last if m/^-----BEGIN PGP/;
}
+ $_ = $copyl;
for (;;) {
print DS or die $!;
$!=0; $_=<T>;
return unless $policy & (FRESHREPO|NOFFCHECK);
my $garbagerepo = "$dgitrepos/${package}_garbage";
- acquiretree($realdestrepo,1);
+ lockrealtree();
local $ENV{GIT_DIR};
foreach my $garb ("$garbagerepo", "$garbagerepo-old") {
my @problems;
- git_for_each_tag_referring($objreferring, sub {
+ git_for_each_tag_referring($onlyreferring, sub {
my ($objid,$fullrefname,$tagname) = @_;
debug "checktagnoreplay - overwriting $fullrefname=$objid";
my $supers = $supersedes{$fullrefname};
debug "translated version $v";
$tagname eq "debian/$v" or die;
- acquiretree($realdestrepo,1);
+ lockrealtree();
- $policy = policyhook(NOFFCHECK|FRESHREPO, 'push',$package,
- $version,$suite,$tagname,
- join(",",@delberatelies));
+ my @policy_args = ($package,$version,$suite,$tagname,
+ join(",",@deliberatelies));
+ $policy = policyhook(NOFFCHECK|FRESHREPO, 'push', @policy_args);
checktagnoreplay();
checksuite();
$destrepo = "${workrepo}_fresh"; # workrepo lock covers
mkrepo_fromtemplate $destrepo;
}
+
+ policyhook(0, 'push-confirm', @policy_args);
+}
+
+sub onwardpush () {
+ my @cmd = (qw(git send-pack), $destrepo);
+ push @cmd, qw(--force) if $policy & NOFFCHECK;
+ push @cmd, "$commit:refs/dgit/$suite",
+ "$tagval:refs/tags/$tagname";
+ debugcmd @cmd;
+ $!=0;
+ my $r = system @cmd;
+ !$r or die "onward push to $destrepo failed: $r $!";
}
sub stunthook () {
sub fixmissing__git_upload_pack () {
$destrepo = "$dgitrepos/_empty";
- my $lfh = acquiretree($destrepo,1);
+ my $lfh = locksometree($destrepo);
return if stat_exists $destrepo;
rmtree "$destrepo.new";
mkemptyrepo "$destrepo.new", "0644";
}
sub main__git_upload_pack () {
- my $lfh = acquiretree($destrepo,1);
+ my $lfh = locksometree($destrepo);
chdir $destrepo or die "$destrepo: $!";
close $lfh;
runcmd qw(git upload-pack), ".";
return $v;
}
-sub parseargsdispatch () {
- die unless @ARGV;
-
- delete $ENV{'GIT_DIR'}; # if not run via ssh, our parent git process
- delete $ENV{'GIT_PREFIX'}; # sets these and they mess things up
+our %indistrodir = (
+ # keys are used for DGIT_DRS_XXX too
+ 'repos' => \$dgitrepos,
+ 'suites' => \$suitesfile,
+ 'policy-hook' => \$policyhook,
+ );
- if ($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;
- $package = shift @ARGV;
- defined($distro = $ENV{'DGIT_DRS_DISTRO'}) or die;
- defined($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 $!;
- defined($policyhook = $ENV{'DGIT_DRS_POLICYHOOK'}) or die $!;
- open STDOUT, ">&STDERR" or die $!;
- eval {
- stunthook();
- };
- if ($@) {
- recorderror "$@" or die;
- die $@;
- }
- exit 0;
- }
+our @hookenvs = qw(distro suitesfile policyhook keyrings dgitrepos);
- $ENV{'DGIT_DRS_DISTRO'} = argval();
- $ENV{'DGIT_DRS_SUITES'} = argval();
- $ENV{'DGIT_DRS_KEYRINGS'} = argval();
- $dgitrepos = argval();
- $ENV{'DGIT_DRS_POLICYHOOK'} = $policyhook = argval();
+# workrepo and destrepo handled ad-hoc
- die unless @ARGV==1 && $ARGV[0] eq '--ssh';
+sub mode_ssh () {
+ die if @ARGV;
my $cmd = $ENV{'SSH_ORIGINAL_COMMAND'};
$cmd =~ m{
or reject "command string not understood";
my $method = $1;
$package = $2;
- $realdestrepo = "$dgitrepos/$package.git";
my $funcn = $method;
$funcn =~ y/-/_/;
reject "unknown method" unless $mainfunc;
- my $lfh = acquiretree($realdestrepo,1);
+ my $lfh = lockrealtree();
- my ($policy, $pollock) = policyhook(FRESHREPO,'check-package',$package);
+ $policy = policyhook(FRESHREPO,'check-package',$package);
if ($policy & FRESHREPO) {
movetogarbage;
}
- close $pollock or die $!;
close $lfh;
- if (stat_exists $realdestrepo) {
- $destrepo = $realdestrepo;
+ if (stat_exists realdestrepo) {
+ $destrepo = realdestrepo;
} else {
debug " fixmissing $funcn";
my $fixfunc = $main::{"fixmissing__$funcn"};
&$mainfunc;
}
+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;
+ $package = shift @ARGV;
+ ${ $main::{$_} } = $ENV{"DGIT_DRS_\U$_"} foreach @hookenvs;
+ defined($workrepo = $ENV{'DGIT_DRS_WORK'}) or die;
+ defined($destrepo = $ENV{'DGIT_DRS_DEST'}) or die;
+ open STDOUT, ">&STDERR" or die $!;
+ eval {
+ stunthook();
+ };
+ if ($@) {
+ recorderror "$@" or die;
+ die $@;
+ }
+ exit 0;
+ }
+
+ $distro = $ENV{'DGIT_DRS_DISTRO'} = argval();
+ my $distrodir = argval();
+ $keyrings = $ENV{'DGIT_DRS_KEYRINGS'} = argval();
+
+ foreach my $dk (keys %indistrodir) {
+ ${ $indistrodir{$dk} } = "$distrodir/$dk";
+ }
+
+ while (@ARGV && $ARGV[0] =~ m/^--([-0-9a-z]+)=/ && $indistrodir{$1}) {
+ ${ $indistrodir{$1} } = $'; #';
+ shift @ARGV;
+ }
+
+ $ENV{"DGIT_DRS_\U$_"} = ${ $main::{$_} } foreach @hookenvs;
+
+ die unless @ARGV==1;
+
+ my $mode = shift @ARGV;
+ die unless $mode =~ m/^--(\w+)$/;
+ my $fn = ${*::}{"mode_$1"};
+ die unless $fn;
+ $fn->();
+}
+
sub unlockall () {
while (my $fh = pop @lockfhs) { close $fh; }
}
foreach my $lf (<*.lock>) {
my $tree = $lf;
$tree =~ s/\.lock$//;
- next unless acquiretree($tree, 0);
+ next unless acquirermtree($tree, 0);
remove $lf or warn $!;
unlockall();
}
~ianmdlvl / dgit.git / blobdiff