# 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
+# --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)
# 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
+# (With --cron AUTH-SPEC is not used and may be the empty string.)
use strict;
+$SIG{__WARN__} = sub { die $_[0]; };
# DGIT-REPOS-DIR contains:
# git tree (or other object) lock (in acquisition order, outer first)
# cleanup to do
#
# Policy hook script is invoked like this:
-# POLICY-HOOK-SCRIPT DISTRO DGIT-REPOS-DIR ACTION...
+# POLICY-HOOK-SCRIPT DISTRO DGIT-REPOS-DIR DGIT-LIVE-DIR DISTRO-DIR ACTION...
# ie.
# POLICY-HOOK-SCRIPT ... check-list [...]
# POLICY-HOOK-SCRIPT ... check-package PACKAGE [...]
-# POLICY-HOOK-SCRIPT ... push|push-confirm PACKAGE \
+# POLICY-HOOK-SCRIPT ... push PACKAGE \
# VERSION SUITE TAGNAME DELIBERATELIES [...]
+# POLICY-HOOK-SCRIPT ... push-confirm PACKAGE \
+# VERSION SUITE TAGNAME DELIBERATELIES FRESH-REPO|'' [...]
#
# Exit status is a bitmask. Bit weight constants are defined in Dgit.pm.
# NOFFCHECK (2)
# to-be-pushed objects have been received; TAGNAME is the
# version-based tag
#
+# FRESH-REPO is '' iff the repo for this package already existed, or
+# the pathname of the newly-created repo which will be renamed into
+# place if everything goes well. (NB that this is generally not the
+# same repo as the cwd, because the objects are first received into a
+# temporary repo so they can be examined.)
+#
# if push requested FRESHREPO, push-confirm happens in said fresh repo
+# and FRESH-REPO is guaranteed not to be ''.
#
# 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 (one per line). Then check-package will be
+# invoked for each named package, in each case after taking an
+# appropriate lock.
+#
+# If policy hook wants to run dgit (or something else in the dgit
+# package), it should use DGIT-LIVE-DIR/dgit (etc.)
use POSIX;
use Fcntl qw(:flock);
use File::Path qw(rmtree);
+use File::Temp qw(tempfile);
use Debian::Dgit qw(:DEFAULT :policyflags);
-open DEBUG, ">/dev/null" or die $!;
+initdebug('');
our $func;
our $dgitrepos;
our $distro;
our $suitesfile;
our $policyhook;
-our $realdestrepo;
+our $dgitlive;
+our $distrodir;
our $destrepo;
our $workrepo;
our $keyrings;
our @lockfhs;
-our $debug='';
+
our @deliberatelies;
our %supersedes;
our $policy;
#----- utilities -----
-sub debug {
- print DEBUG "$debug @_\n";
-}
+sub realdestrepo () { "$dgitrepos/$package.git"; }
sub acquirelock ($$) {
my ($lock, $must) = @_;
my $fh;
- printf DEBUG "$debug locking %s %d\n", $lock, $must;
+ printdebug sprintf "locking %s %d\n", $lock, $must;
for (;;) {
close $fh if $fh;
$fh = new IO::File $lock, ">" or die "open $lock: $!";
my $ok = flock $fh, $must ? LOCK_EX : (LOCK_EX|LOCK_NB);
if (!$ok) {
die "flock $lock: $!" if $must;
- debug " locking $lock failed";
+ printdebug " locking $lock failed\n";
return undef;
}
next unless stat_exists $lock;
}
sub lockrealtree () {
- locksometree($realdestrepo);
+ locksometree(realdestrepo);
}
sub mkrepotmp () {
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 @_;
+ debugcmd '+',@_;
$!=0; $?=0;
my $r = system @_;
- die "@_ $? $!" if $r;
+ die (shellquote @_)." $? $!" if $r;
}
sub policyhook {
my ($policyallowbits, @polargs) = @_;
# => ($exitstatuspolicybitmap);
die if $policyallowbits & ~0x3e;
- my @cmd = ($policyhook,$distro,$dgitrepos,@polargs);
- debugcmd @cmd;
+ my @cmd = ($policyhook,$distro,$dgitrepos,$dgitlive,$distrodir,@polargs);
+ debugcmd '+',@cmd;
my $r = system @cmd;
die "system: $!" if $r < 0;
- die "hook (@cmd) failed ($?)" if $r & ~($policyallowbits << 8);
+ die "hook (".(shellquote @cmd).") failed ($?)"
+ if $r & ~($policyallowbits << 8);
+ printdebug sprintf "hook => %#x\n", $r;
return $r >> 8;
}
my ($dir) = @_;
my $template = "$dgitrepos/_template";
locksometree($template);
- debug "copy template $template -> $dir";
+ printdebug "copy template $template -> $dir\n";
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
# $garbage or $garbage-old.
if (stat_exists "$garbagerepo") {
+ printdebug "movetogarbage: rmtree $garbagerepo-tmp\n";
rmtree "$garbagerepo-tmp";
if (rename "$garbagerepo-old", "$garbagerepo-tmp") {
+ printdebug "movetogarbage: $garbagerepo-old -> -tmp, rmtree\n";
rmtree "$garbagerepo-tmp";
} else {
die "$garbagerepo $!" unless $!==ENOENT;
+ printdebug "movetogarbage: $garbagerepo-old -> -tmp\n";
}
+ printdebug "movetogarbage: $garbagerepo -> -old\n";
rename "$garbagerepo", "$garbagerepo-old" or die "$garbagerepo $!";
}
- rename $realdestrepo, $garbagerepo
+ my $real = realdestrepo;
+ printdebug "movetogarbage: $real -> $garbagerepo\n";
+ rename $real, $garbagerepo
or $! == ENOENT
or die "$garbagerepo $!";
}
+sub policy_checkpackage () {
+ my $lfh = lockrealtree();
+
+ $policy = policyhook(FRESHREPO,'check-package',$package);
+ if ($policy & FRESHREPO) {
+ movetogarbage();
+ }
+
+ close $lfh;
+}
+
#----- git-receive-pack -----
sub fixmissing__git_receive_pack () {
close $fh or die "$prerecv: $!";
$ENV{'DGIT_DRS_WORK'}= $workrepo;
$ENV{'DGIT_DRS_DEST'}= $destrepo;
- debug " stunt hook set up $prerecv";
+ printdebug " stunt hook set up $prerecv\n";
}
sub dealwithfreshrepo () {
}
sub maybeinstallprospective () {
- return if $destrepo eq $realdestrepo;
+ return if $destrepo eq realdestrepo;
if (open REJ, "<", "$workrepo/drs-error") {
local $/ = undef;
$!==&ENOENT or die $!;
}
- debug " show-ref ($destrepo) ...";
+ printdebug " show-ref ($destrepo) ...\n";
my $child = open SR, "-|";
defined $child or die $!;
my %got = qw(tag 0 head 0);
while (<SR>) {
chomp or die;
- debug " show-refs| $_";
+ printdebug " show-refs| $_\n";
s/^\S*[1-9a-f]\S* (\S+)$/$1/ or die;
my $wh =
m{^refs/tags/} ? 'tag' :
}
$!=0; $?=0; close SR or $?==256 or die "$? $!";
- debug "installprospective ?";
+ printdebug "installprospective ?\n";
die Dumper(\%got)." -- missing refs in new repo"
if grep { !$_ } values %got;
movetogarbage;
}
- debug "install $destrepo => $realdestrepo";
- rename $destrepo, $realdestrepo or die $!;
+ printdebug "install $destrepo => ".realdestrepo."\n";
+ rename $destrepo, realdestrepo or die $!;
remove "$destrepo.lock" or die $!;
}
our ($version, %tagh);
sub readupdates () {
- debug " updates ...";
+ printdebug " updates ...\n";
while (<STDIN>) {
chomp or die;
- debug " upd.| $_";
+ printdebug " upd.| $_\n";
m/^(\S+) (\S+) (\S+)$/ or die "$_ ?";
my ($old, $sha1, $refname) = ($1, $2, $3);
if ($refname =~ m{^refs/tags/(?=debian/)}) {
reject "push is missing tag ref update" unless defined $tagname;
reject "push is missing head ref update" unless defined $suite;
- debug " updates ok.";
+ printdebug " updates ok.\n";
}
sub parsetag () {
- debug " parsetag...";
+ printdebug " parsetag...\n";
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 $!;
T->error and die $!;
close PT or die $!;
close DS or die $!;
- debug " parsetag ok.";
+ printdebug " parsetag ok.\n";
}
sub checksig_keyring ($) {
my $ok = undef;
- debug " checksig keyring $keyringfile...";
+ printdebug " checksig keyring $keyringfile...\n";
our @cmd = (qw(gpgv --status-fd=1 --keyring),
$keyringfile,
qw(dgit-tmp/plaintext.asc dgit-tmp/plaintext));
- debugcmd @cmd;
+ debugcmd '|',@cmd;
open P, "-|", @cmd
or die $!;
while (<P>) {
next unless s/^\[GNUPG:\] //;
chomp or die;
- debug " checksig| $_";
+ printdebug " checksig| $_\n";
my @l = split / /, $_;
if ($l[0] eq 'NO_PUBKEY') {
last;
}
close P;
- debug sprintf " checksig ok=%d", !!$ok;
+ printdebug sprintf " checksig ok=%d\n", !!$ok;
return $ok;
}
sub dm_txt_check ($$) {
my ($keyid, $dmtxtfn) = @_;
- debug " dm_txt_check $keyid $dmtxtfn";
+ printdebug " dm_txt_check $keyid $dmtxtfn\n";
open DT, '<', $dmtxtfn or die "$dmtxtfn $!";
while (<DT>) {
m/^fingerprint:\s+$keyid$/oi
s/\([^()]+\)//;
s/\,//;
chomp or die;
- debug " dm_txt_check allow| $_";
+ printdebug " dm_txt_check allow| $_\n";
foreach my $p (split /\s+/) {
if ($p eq $package) {
# yay!
- debug " dm_txt_check ok";
+ printdebug " dm_txt_check ok\n";
return;
}
}
sub verifytag () {
foreach my $kas (split /:/, $keyrings) {
- debug "verifytag $kas...";
+ printdebug "verifytag $kas...\n";
$kas =~ s/^([^,]+),// or die;
my $keyid = checksig_keyring $1;
if (defined $keyid) {
if ($kas =~ m/^a$/) {
- debug "verifytag a ok";
+ printdebug "verifytag a ok\n";
return; # yay
} elsif ($kas =~ m/^m([^,]+)$/) {
dm_txt_check($keyid, $1);
- debug "verifytag m ok";
+ printdebug "verifytag m ok\n";
return;
} else {
die;
}
sub checksuite () {
- debug "checksuite ($suitesfile)";
+ printdebug "checksuite ($suitesfile)\n";
open SUITES, "<", $suitesfile or die $!;
while (<SUITES>) {
chomp;
if (!defined $ENV{GIT_DIR}) {
# Nothing to overwrite so the FRESHREPO and NOFFCHECK were
# pointless. Oh well.
- debug "checktagnoreplay - no garbage, ok";
+ printdebug "checktagnoreplay - no garbage, ok\n";
return;
}
$? and die "$branch $?";
if (!length) {
# No such branch - NOFFCHECK was unnecessary. Oh well.
- debug "checktagnoreplay - not FRESHREPO, new branch, ok";
+ printdebug "checktagnoreplay - not FRESHREPO, new branch, ok\n";
return;
}
m/^(\w+)\n$/ or die "$branch $_ ?";
$onlyreferring = $1;
- debug "checktagnoreplay - not FRESHREPO,".
- " checking for overwriting refs/$branch=$onlyreferring";
+ printdebug "checktagnoreplay - not FRESHREPO,".
+ " checking for overwriting refs/$branch=$onlyreferring\n";
}
my @problems;
git_for_each_tag_referring($onlyreferring, sub {
my ($objid,$fullrefname,$tagname) = @_;
- debug "checktagnoreplay - overwriting $fullrefname=$objid";
+ printdebug "checktagnoreplay - overwriting $fullrefname=$objid\n";
my $supers = $supersedes{$fullrefname};
if (!defined $supers) {
push @problems, "does not supersede $fullrefname";
join("; ", @problems).
"\n";
}
- debug "checktagnoreply - all ok"
+ printdebug "checktagnoreply - all ok\n"
}
sub tagh1 ($) {
}
sub checks () {
- debug "checks";
+ printdebug "checks\n";
tagh1('type') eq 'commit' or reject "tag refers to wrong kind of object";
tagh1('object') eq $commit or reject "tag refers to wrong commit";
my $v = $version;
$v =~ y/~:/_%/;
- debug "translated version $v";
+ printdebug "translated version $v\n";
$tagname eq "debian/$v" or die;
lockrealtree();
checksuite();
# check that our ref is being fast-forwarded
- debug "oldcommit $oldcommit";
+ printdebug "oldcommit $oldcommit\n";
if (!($policy & NOFFCHECK) && $oldcommit =~ m/[^0]/) {
$?=0; $!=0; my $mb = `git merge-base $commit $oldcommit`;
chomp $mb;
mkrepo_fromtemplate $destrepo;
}
- policyhook(0, 'push-confirm', @policy_args);
+ my $willinstall = ($destrepo eq realdestrepo ? '' : $destrepo);
+ policyhook(0, 'push-confirm', @policy_args, $willinstall);
}
sub onwardpush () {
push @cmd, qw(--force) if $policy & NOFFCHECK;
push @cmd, "$commit:refs/dgit/$suite",
"$tagval:refs/tags/$tagname";
- debugcmd @cmd;
+ debugcmd '+',@cmd;
$!=0;
my $r = system @cmd;
!$r or die "onward push to $destrepo failed: $r $!";
}
sub stunthook () {
- debug "stunthook";
+ printdebug "stunthook in $workrepo\n";
chdir $workrepo or die "chdir $workrepo: $!";
mkdir "dgit-tmp" or $!==EEXIST or die $!;
readupdates();
verifytag();
checks();
onwardpush();
- debug "stunthook done.";
+ printdebug "stunthook done.\n";
}
#----- git-upload-pack -----
sub main__git_upload_pack () {
my $lfh = locksometree($destrepo);
+ printdebug "git-upload-pack in $destrepo\n";
chdir $destrepo or die "$destrepo: $!";
close $lfh;
runcmd qw(git upload-pack), ".";
return $v;
}
+our %indistrodir = (
+ # keys are used for DGIT_DRS_XXX too
+ 'repos' => \$dgitrepos,
+ 'suites' => \$suitesfile,
+ 'policy-hook' => \$policyhook,
+ 'dgit-live' => \$dgitlive,
+ );
+
+our @hookenvs = qw(distro suitesfile policyhook
+ dgitlive keyrings dgitrepos distrodir);
+
+# workrepo and destrepo handled ad-hoc
+
+sub mode_ssh () {
+ die if @ARGV;
+
+ my $cmd = $ENV{'SSH_ORIGINAL_COMMAND'};
+ $cmd =~ m{
+ ^
+ (?: \S* / )?
+ ( [-0-9a-z]+ )
+ \s+
+ '? (?: \S* / )?
+ ($package_re) \.git
+ '?$
+ }ox
+ or reject "command string not understood";
+ my $method = $1;
+ $package = $2;
+
+ my $funcn = $method;
+ $funcn =~ y/-/_/;
+ my $mainfunc = $main::{"main__$funcn"};
+
+ reject "unknown method" unless $mainfunc;
+
+ policy_checkpackage();
+
+ if (stat_exists realdestrepo) {
+ $destrepo = realdestrepo;
+ } else {
+ printdebug " fixmissing $funcn\n";
+ my $fixfunc = $main::{"fixmissing__$funcn"};
+ &$fixfunc;
+ }
+
+ printdebug " running main $funcn\n";
+ &$mainfunc;
+}
+
+sub mode_cron () {
+ die if @ARGV;
+
+ my $listfh = tempfile();
+ open STDOUT, ">&", $listfh or die $!;
+ policyhook(0,'check-list');
+ open STDOUT, ">&STDERR" or die $!;
+
+ seek $listfh, 0, 0 or die $!;
+ while (<$listfh>) {
+ chomp or die;
+ next if m/^\s*\#/;
+ next unless m/\S/;
+ die unless m/^($package_re)$/;
+
+ $package = $1;
+ policy_checkpackage();
+ }
+ die $! if $listfh->error;
+}
+
sub parseargsdispatch () {
die unless @ARGV;
delete $ENV{'GIT_PREFIX'}; # sets these and they mess things up
if ($ENV{'DGIT_DRS_DEBUG'}) {
- $debug='=';
- open DEBUG, ">&STDERR" or die $!;
+ enabledebug();
}
if ($ARGV[0] eq '--pre-receive-hook') {
- if ($debug) { $debug.="="; }
+ if ($debuglevel) {
+ $debugprefix.="=";
+ printdebug "in stunthook ".(shellquote @ARGV)."\n";
+ foreach my $k (sort keys %ENV) {
+ printdebug "$k=$ENV{$k}\n" if $k =~ m/^DGIT/;
+ }
+ }
shift @ARGV;
@ARGV == 1 or die;
$package = shift @ARGV;
- defined($distro = $ENV{'DGIT_DRS_DISTRO'}) or die;
- defined($dgitrepos = $ENV{'DGIT_DRS_REPOS'}) or die;
- defined($suitesfile = $ENV{'DGIT_DRS_SUITES'}) or die;
+ ${ $main::{$_} } = $ENV{"DGIT_DRS_\U$_"} foreach @hookenvs;
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();
exit 0;
}
- $ENV{'DGIT_DRS_DISTRO'} = $distro = argval();
- $ENV{'DGIT_DRS_SUITES'} = argval();
- $ENV{'DGIT_DRS_KEYRINGS'} = argval();
- $ENV{'DGIT_DRS_REPOS'} = $dgitrepos = argval();
- $ENV{'DGIT_DRS_POLICYHOOK'} = $policyhook = argval();
+ $distro = argval();
+ $distrodir = argval();
+ $keyrings = argval();
- die unless @ARGV==1 && $ARGV[0] eq '--ssh';
-
- my $cmd = $ENV{'SSH_ORIGINAL_COMMAND'};
- $cmd =~ m{
- ^
- (?: \S* / )?
- ( [-0-9a-z]+ )
- \s+
- '? (?: \S* / )?
- ($package_re) \.git
- '?$
- }ox
- or reject "command string not understood";
- my $method = $1;
- $package = $2;
- $realdestrepo = "$dgitrepos/$package.git";
-
- my $funcn = $method;
- $funcn =~ y/-/_/;
- my $mainfunc = $main::{"main__$funcn"};
-
- reject "unknown method" unless $mainfunc;
-
- my $lfh = lockrealtree();
+ foreach my $dk (keys %indistrodir) {
+ ${ $indistrodir{$dk} } = "$distrodir/$dk";
+ }
- $policy = policyhook(FRESHREPO,'check-package',$package);
- if ($policy & FRESHREPO) {
- movetogarbage;
+ while (@ARGV && $ARGV[0] =~ m/^--([-0-9a-z]+)=/ && $indistrodir{$1}) {
+ ${ $indistrodir{$1} } = $'; #';
+ shift @ARGV;
}
- close $lfh;
+ $ENV{"DGIT_DRS_\U$_"} = ${ $main::{$_} } foreach @hookenvs;
- if (stat_exists $realdestrepo) {
- $destrepo = $realdestrepo;
- } else {
- debug " fixmissing $funcn";
- my $fixfunc = $main::{"fixmissing__$funcn"};
- &$fixfunc;
- }
+ die unless @ARGV==1;
- debug " running main $funcn";
- &$mainfunc;
+ my $mode = shift @ARGV;
+ die unless $mode =~ m/^--(\w+)$/;
+ my $fn = ${*::}{"mode_$1"};
+ die unless $fn;
+ $fn->();
}
sub unlockall () {
~ianmdlvl / dgit.git / blobdiff