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# Copyright (C) 2008 Arne Georg Gleditsch <lxr@linux.no>.
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# The full GNU General Public License is included in this distribution
# in the file called COPYING.
package LXRng::Repo::Git;
use strict;
use Memoize;
use LXRng::Cached;
use LXRng::Repo::Git::Iterator;
use LXRng::Repo::Git::File;
use LXRng::Repo::Git::Directory;
sub _git_cmd {
my ($self, $cmd, @args) = @_;
my $git;
my $pid = open($git, "-|");
die $! unless defined $pid;
# warn("git --git-dir=".$$self{'root'}." $cmd @args");
if ($pid == 0) {
exec('git', '--git-dir='.$$self{'root'}, $cmd, @args);
warn $!;
kill(9, $$);
}
return $git;
}
sub new {
my ($class, $root, %args) = @_;
memoize('_release_timestamp');
return bless({root => $root, %args}, $class);
}
sub cache_key {
my ($self) = @_;
return $$self{'root'};
}
sub _release_timestamp {
my ($self, $release) = @_;
my $cinfo = $self->_git_cmd('cat-file', '-t', $release);
my ($type) = <$cinfo> =~ /(\S+)/;
return undef unless $type eq 'tag' or $type eq 'commit';
my $cinfo = $self->_git_cmd('cat-file', $type, $release);
my $time;
while (<$cinfo>) {
$time = $1 if /^author .*? (\d+(?: [-+]\d+|))$/ ;
$time ||= $1 if /^committer .*? (\d+(?: [-+]\d+|))$/ ;
$time ||= $1 if /^tagger .*? (\d+(?: [-+]\d+|))$/ ;
}
return $time || 0;
}
sub _use_author_timestamp {
my ($self) = @_;
return $$self{'author_timestamp'};
}
sub _sort_key {
my ($v) = @_;
$v =~ s/(\d+)/sprintf("%05d", $1)/ge;
return $v;
}
sub allversions {
my ($self) = @_;
cached {
my @tags;
my $tags = $self->_git_cmd('tag', '-l');
while (<$tags>) {
chomp;
next if $$self{'release_re'} and $_ !~ $$self{'release_re'};
push(@tags, $_);
}
return (sort {_sort_key($b) cmp _sort_key($a) } @tags);
};
}
sub node {
my ($self, $path, $release, $rev) = @_;
$path =~ s,^/+,,;
$path =~ s,/+$,,;
if ($path eq '') {
open(my $tag, '<', $$self{'root'}.'/refs/tags/'.$release)
or return undef;
my $ref = <$tag>;
close($tag);
chomp($ref);
return LXRng::Repo::Git::Directory->new($self, '', $ref);
}
my $type;
if ($rev) {
$type = 'blob';
}
else {
my $git = $self->_git_cmd('ls-tree', $release, $path);
my ($mode, $gitpath);
($mode, $type, $rev, $gitpath) = split(" ", <$git>, 4);
}
if ($type eq 'tree') {
return LXRng::Repo::Git::Directory->new($self, $path, $rev, $release);
}
elsif ($type eq 'blob') {
return LXRng::Repo::Git::File->new($self, $path, $rev, $release);
}
else {
return undef;
}
}
sub iterator {
my ($self, $release) = @_;
return LXRng::Repo::Git::Iterator->new($self, $release);
}
1;
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