[catagits/Gitalist.git] / lib / Gitalist / Git / Project.pm

use MooseX::Declare;

=head1 NAME

Gitalist::Git::Project - Model of a git repository

=head1 SYNOPSIS

    my $gitrepo = dir('/repo/base/Gitalist');
    my $project = Gitalist::Git::Project->new($gitrepo);
     $project->name;        # 'Gitalist'
     $project->path;        # '/repo/base/Gitalist/.git'
     $project->description; # 'Unnamed repository.'

=head1 DESCRIPTION

This class models a git repository, referred to in Gitalist
as a "Project".

=cut

class Gitalist::Git::Project with Gitalist::Git::HasUtils {
    # FIXME, use Types::Path::Class and coerce
    use MooseX::Types::Common::String qw/NonEmptySimpleStr/;
    use MooseX::Types::Path::Class qw/Dir/;
    use MooseX::Types::Moose qw/Str Maybe Bool HashRef ArrayRef/;
    use List::MoreUtils qw/any zip/;
    use DateTime;
    use aliased 'Gitalist::Git::Object';

=head1 ATTRIBUTES

=head2 name

=cut

    has name => ( isa => NonEmptySimpleStr,
                  is => 'ro', required => 1 );

=head2 path

L<Path::Class:Dir> for the location of the git repository.

=cut

    has path => ( isa => Dir,
                  is => 'ro', required => 1);

=head2 description

String containing .git/description

=cut

    has description => ( isa => Str,
                         is => 'ro',
                         lazy_build => 1,
                     );

=head2 owner

Owner of the files on disk.

=cut

    has owner => ( isa => NonEmptySimpleStr,
                   is => 'ro',
                   lazy_build => 1,
               );

=head2 last_change

L<DateTime> for the time of the last update.
undef if the repository has never been used.

=cut

    has last_change => ( isa => Maybe['DateTime'],
                         is => 'ro',
                         lazy_build => 1,
                     );

=head2 is_bare

Bool indicating whether this Project is bare.

=cut

    has is_bare => ( isa => Bool,
                     is => 'ro',
                     lazy => 1,
                     default => sub {
                         -d $_[0]->path->parent->subdir->($_[0]->name)
                             ? 1 : 0
                         },
                     );

    method BUILD {
        $self->$_() for qw/last_change owner description/; # Ensure to build early.
    }

    around BUILDARGS (ClassName $class: Dir $dir) {
        my $name = $dir->dir_list(-1);
        $dir = $dir->subdir('.git') if (-f $dir->file('.git', 'HEAD'));
        confess("Can't find a git repository at " . $dir)
            unless ( -f $dir->file('HEAD') );
        return $class->$orig(name => $name,
                             path => $dir);
    }

    method _build__util {
        Gitalist::Git::Util->new(
            project => $self,
        );
    }

    our $SHA1RE = qr/[0-9a-fA-F]{40}/;

    method _build_description {
        my $description = "";
        eval {
            $description = $self->path->file('description')->slurp;
            chomp $description;
        };
        return $description;
    }

    method _build_owner {
        my ($gecos, $name) = (getpwuid $self->path->stat->uid)[6,0];
        $gecos =~ s/,+$//;
        return length($gecos) ? $gecos : $name;
    }

    method _build_last_change {
        my $last_change;
        my $output = $self->run_cmd(
            qw{ for-each-ref --format=%(committer)
                --sort=-committerdate --count=1 refs/heads
          });
        if (my ($epoch, $tz) = $output =~ /\s(\d+)\s+([+-]\d+)$/) {
            my $dt = DateTime->from_epoch(epoch => $epoch);
            $dt->set_time_zone($tz);
            $last_change = $dt;
        }
        return $last_change;
    }

=head2 heads

Return an array containing the list of heads.

=cut

    method heads {
        my $cmdout = $self->run_cmd(qw/for-each-ref --sort=-committerdate /, '--format=%(objectname)%00%(refname)%00%(committer)', 'refs/heads');
        my @output = $cmdout ? split(/\n/, $cmdout) : ();
        my @ret;
        for my $line (@output) {
            my ($rev, $head, $commiter) = split /\0/, $line, 3;
            $head =~ s!^refs/heads/!!;

            push @ret, { sha1 => $rev, name => $head };

            #FIXME: That isn't the time I'm looking for..
            if (my ($epoch, $tz) = $line =~ /\s(\d+)\s+([+-]\d+)$/) {
                my $dt = DateTime->from_epoch(epoch => $epoch);
                $dt->set_time_zone($tz);
                $ret[-1]->{last_change} = $dt;
            }
        }

        return @ret;
    }

=head2 references

Return a hash of references.

=cut

    has references => ( isa => HashRef[ArrayRef[Str]], is => 'ro', lazy_build => 1 );

    method _build_references {

    	# 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
    	# c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
    	my $cmdout = $self->run_cmd(qw(show-ref --dereference))
	    	or return;
            my @reflist = $cmdout ? split(/\n/, $cmdout) : ();
	    my %refs;
	    for(@reflist) {
		    push @{$refs{$1}}, $2
			    if m!^($SHA1RE)\srefs/(.*)$!;
	    }

	    return \%refs;
    }

=head2 head_hash

Find the hash of a given head (defaults to HEAD).

=cut

    method head_hash (Str $head?) {
        my $output = $self->run_cmd(qw/rev-parse --verify/, $head || 'HEAD' );
        return unless defined $output;

        my($sha1) = $output =~ /^($SHA1RE)$/;
        return $sha1;
    }

=head2 list_tree

Return an array of contents for a given tree.
The tree is specified by sha1, and defaults to HEAD.
The keys for each item will be:

	mode
	type
	object
	file

=cut

    method list_tree (Str $sha1?) {
        $sha1 ||= $self->head_hash;

        my $output = $self->run_cmd(qw/ls-tree -z/, $sha1);
        return unless defined $output;

        my @ret;
        for my $line (split /\0/, $output) {
            my ($mode, $type, $object, $file) = split /\s+/, $line, 4;
            push @ret, Object->new( mode => oct $mode,
                                    type => $type,
                                    sha1 => $object,
                                    file => $file,
                                    project => $self,
                                  );
        }
        return @ret;
    }

    method get_object (NonEmptySimpleStr $sha1) {
        unless ( $self->_is_valid_rev($sha1) ) {
            $sha1 = $self->head_hash($sha1);
        }
        return Object->new(
            project => $self,
            sha1 => $sha1,
        );
    }

    method _is_valid_rev (Str $rev) {
        return ($rev =~ /^($SHA1RE)$/);
    }

    # Should be in ::Object
    method get_object_mode_string (Gitalist::Git::Object $object) {
        return $object->modestr;
    }

    method get_object_type (NonEmptySimpleStr $sha1) {
        return $self->get_object($sha1)->type;
    }

    method cat_file (NonEmptySimpleStr $sha1) {
        return $self->get_object($sha1)->contents;
    }

    method hash_by_path ($base, $path?, $type?) {
        $path ||= '';
        $path =~ s{/+$}();

        my $output = $self->run_cmd('ls-tree', $base, '--', $path)
            or return;
        my($line) = $output ? split(/\n/, $output) : ();

        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa	panic.c'
        $line =~ m/^([0-9]+) (.+) ($SHA1RE)\t/;
        return defined $type && $type ne $2
            ? ()
                : $3;
    }

    method list_revs ( NonEmptySimpleStr :$sha1!,
                       Int :$count?,
                       Int :$skip?,
                       HashRef :$search?,
                       NonEmptySimpleStr :$file?
                   ) {
        $sha1 = $self->head_hash($sha1)
            if !$sha1 || $sha1 !~ $SHA1RE;

	my @search_opts;
        if($search) {
            $search->{type} = 'grep'
                if $search->{type} eq 'commit';
            @search_opts = (
                # This seems a little fragile ...
                qq[--$search->{type}=$search->{text}],
                '--regexp-ignore-case',
                $search->{regexp} ? '--extended-regexp' : '--fixed-strings'
            );
        }

        my $output = $self->run_cmd(
            'rev-list',
            '--header',
            (defined $count ? "--max-count=$count" : ()),
            (defined $skip ? "--skip=$skip"       : ()),
            @search_opts,
            $sha1,
            '--',
            ($file ? $file : ()),
        );
        return unless $output;

        my @revs = $self->parse_rev_list($output);

        return @revs;
    }

    method parse_rev_list ($output) {
        return
            map  $self->get_gpp_object($_),
                grep $self->_is_valid_rev($_),
                    map  split(/\n/, $_, 6), split /\0/, $output;
    }

    # XXX Ideally this would return a wee object instead of ad hoc structures.
    method diff ( Gitalist::Git::Object :$commit,
                  Bool :$patch?,
                  Maybe[NonEmptySimpleStr] :$parent?,
                  NonEmptySimpleStr :$file? ) {
        # Use parent if specifed, else take the parent from the commit
        # if there is only one, otherwise it was a merge commit.
        $parent = $parent
            ? $parent
            : $commit->parents <= 1
            ? $commit->parent_sha1
            : '-c';
        my @etc = (
            ( $file  ? ('--', $file) : () ),
        );

        my @out = $self->raw_diff(
            ( $patch ? '--patch-with-raw' : () ),
            ( $parent ? $parent : () ),
            $commit->sha1, @etc,
        );

        # XXX Yes, there is much wrongness having parse_diff_tree be destructive.
        my @difftree = $self->parse_diff_tree(\@out);

        return \@difftree
            unless $patch;

        # The blank line between the tree and the patch.
        shift @out;

        # XXX And no I'm not happy about having diff return tree + patch.
        return \@difftree, [$self->parse_diff(@out)];
    }

    method parse_diff (@diff) {
        my @ret;
        for (@diff) {
            # This regex is a little pathological.
            if(m{^diff --git (a/(.*?)) (b/\2)}) {
                push @ret, {
                    head => $_,
                    a    => $1,
                    b    => $3,
                    file => $2,
                    diff => '',
                };
                next;
            }

            if(/^index (\w+)\.\.(\w+) (\d+)$/) {
                @{$ret[-1]}{qw(index src dst mode)} = ($_, $1, $2, $3);
                next
            }

            # XXX Somewhat hacky. Ahem.
            $ret[@ret ? -1 : 0]{diff} .= "$_\n";
        }

        return @ret;
    }

    # gitweb uses the following sort of command for diffing merges:
# /home/dbrook/apps/bin/git --git-dir=/home/dbrook/dev/app/.git diff-tree -r -M --no-commit-id --patch-with-raw --full-index --cc 316cf158df3f6207afbae7270bcc5ba0 --
# and for regular diffs
# /home/dbrook/apps/bin/git --git-dir=/home/dbrook/dev/app/.git diff-tree -r -M --no-commit-id --patch-with-raw --full-index 2e3454ca0749641b42f063730b0090e1 316cf158df3f6207afbae7270bcc5ba0 --

    method raw_diff (@args) {
        my $cmdout = $self->run_cmd(
            qw(diff-tree -r -M --no-commit-id --full-index),
            @args
        );
        return $cmdout ? split(/\n/, $cmdout) : ();
    }

    method parse_diff_tree ($diff) {
        my @keys = qw(modesrc modedst sha1src sha1dst status src dst);
        my @ret;
        while (@$diff and $diff->[0] =~ /^:\d+/) {
            my $line = shift @$diff;
            # see. man git-diff-tree for more info
            # mode src, mode dst, sha1 src, sha1 dst, status, src[, dst]
            my @vals = $line =~ /^:(\d+) (\d+) ($SHA1RE) ($SHA1RE) ([ACDMRTUX]\d*)\t([^\t]+)(?:\t([^\n]+))?$/;
            my %line = zip @keys, @vals;
            # Some convenience keys
            $line{file}   = $line{src};
            $line{sha1}   = $line{sha1dst};
            $line{is_new} = $line{sha1src} =~ /^0+$/
		if $line{sha1src};
            @line{qw/status sim/} = $line{status} =~ /(R)(\d+)/
                if $line{status} =~ /^R/;
            push @ret, \%line;
        }

        return @ret;
    }

    method reflog (@logargs) {
        my @entries
            =  $self->run_cmd(qw(log -g), @logargs)
                =~ /(^commit.+?(?:(?=^commit)|(?=\z)))/msg;

#  commit 02526fc15beddf2c64798a947fecdd8d11bf993d
#  Reflog: HEAD@{14} (The Git Server <git@git.dev.venda.com>)
#  Reflog message: push
#  Author: Foo Barsby <fbarsby@example.com>
#  Date:   Thu Sep 17 12:26:05 2009 +0100
#
#      Merge branch 'abc123'

        return map {
            # XXX Stuff like this makes me want to switch to Git::PurePerl
            my($sha1, $type, $author, $date)
                = m{
                       ^ commit \s+ ($SHA1RE)$
                       .*?
                       Reflog[ ]message: \s+ (.+?)$ \s+
                     Author: \s+ ([^<]+) <.*?$ \s+
                   Date: \s+ (.+?)$
               }xms;

            pos($_) = index($_, $date) + length $date;

            # Yeah, I just did that.
            my($msg) = /\G\s+(\S.*)/sg;
            {
                hash    => $sha1,
                type    => $type,
                author  => $author,

                # XXX Add DateTime goodness.
                date    => $date,
                message => $msg,
            }
            ;
        } @entries;
    }

    # Compatibility

=head2 info

Returns a hash containing properties of this project. The keys will
be:

	name
	description (empty if .git/description is empty/unnamed)
	owner
	last_change

=cut

    method info {
        return {
            name => $self->name,
            description => $self->description,
            owner => $self->owner,
            last_change => $self->last_change,
        };
    };

=head1 SEE ALSO

L<Gitalist::Git::Util> L<Gitalist::Git::Object>

=head1 AUTHORS AND COPYRIGHT

  Catalyst application:
    (C) 2009 Venda Ltd and Dan Brook <dbrook@venda.com>

  Original gitweb.cgi from which this was derived:
    (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
    (C) 2005, Christian Gierke

=head1 LICENSE

FIXME - Is this going to be GPLv2 as per gitweb? If so this is broken..

This library is free software. You can redistribute it and/or modify
it under the same terms as Perl itself.

=cut

} # end class
Commit	Line	Data
56b6dbe6	1	use MooseX::Declare;
56b6dbe6	2
b5b638f7	3	=head1 NAME
b5b638f7	4
894bff59	5	Gitalist::Git::Project - Model of a git repository
b5b638f7	6
	7	=head1 SYNOPSIS
	8
561a3f14	9	my $gitrepo = dir('/repo/base/Gitalist');
	10	my $project = Gitalist::Git::Project->new($gitrepo);
	11	$project->name; # 'Gitalist'
	12	$project->path; # '/repo/base/Gitalist/.git'
	13	$project->description; # 'Unnamed repository.'
b5b638f7	14
	15	=head1 DESCRIPTION
	16
	17	This class models a git repository, referred to in Gitalist
	18	as a "Project".
	19
	20	=cut
	21
38b9e5c8	22	class Gitalist::Git::Project with Gitalist::Git::HasUtils {
56b6dbe6	23	# FIXME, use Types::Path::Class and coerce
56b6dbe6	24	use MooseX::Types::Common::String qw/NonEmptySimpleStr/;
84f31a44	25	use MooseX::Types::Path::Class qw/Dir/;
829d41ed	26	use MooseX::Types::Moose qw/Str Maybe Bool HashRef ArrayRef/;
77edf882	27	use List::MoreUtils qw/any zip/;
b5b638f7	28	use DateTime;
a8a8f8f9	29	use aliased 'Gitalist::Git::Object';
56b6dbe6	30
b5b638f7	31	=head1 ATTRIBUTES
	32
	33	=head2 name
	34
	35	=cut
29debefd	36
56b6dbe6	37	has name => ( isa => NonEmptySimpleStr,
01ced85b	38	is => 'ro', required => 1 );
b5b638f7	39
	40	=head2 path
	41
	42	L<Path::Class:Dir> for the location of the git repository.
	43
	44	=cut
	45
84f31a44	46	has path => ( isa => Dir,
01ced85b	47	is => 'ro', required => 1);
56b6dbe6	48
b5b638f7	49	=head2 description
	50
	51	String containing .git/description
	52
	53	=cut
	54
0617cbd0	55	has description => ( isa => Str,
56b6dbe6	56	is => 'ro',
	57	lazy_build => 1,
	58	);
b5b638f7	59
	60	=head2 owner
	61
	62	Owner of the files on disk.
	63
	64	=cut
	65
56b6dbe6	66	has owner => ( isa => NonEmptySimpleStr,
	67	is => 'ro',
	68	lazy_build => 1,
	69	);
b5b638f7	70
	71	=head2 last_change
	72
	73	L<DateTime> for the time of the last update.
	74	undef if the repository has never been used.
	75
	76	=cut
	77
0617cbd0	78	has last_change => ( isa => Maybe['DateTime'],
56b6dbe6	79	is => 'ro',
	80	lazy_build => 1,
	81	);
	82
b5b638f7	83	=head2 is_bare
	84
	85	Bool indicating whether this Project is bare.
	86
	87	=cut
	88
	89	has is_bare => ( isa => Bool,
	90	is => 'ro',
	91	lazy => 1,
	92	default => sub {
	93	-d $_[0]->path->parent->subdir->($_[0]->name)
	94	? 1 : 0
	95	},
	96	);
84f31a44	97
01ced85b	98	method BUILD {
38b9e5c8	99	$self->$_() for qw/last_change owner description/; # Ensure to build early.
01ced85b	100	}
01ced85b	101
b5b638f7	102	around BUILDARGS (ClassName $class: Dir $dir) {
	103	my $name = $dir->dir_list(-1);
	104	$dir = $dir->subdir('.git') if (-f $dir->file('.git', 'HEAD'));
	105	confess("Can't find a git repository at " . $dir)
	106	unless ( -f $dir->file('HEAD') );
	107	return $class->$orig(name => $name,
	108	path => $dir);
8dbe8024	109	}
8dbe8024	110
941bb5a1	111	method _build__util {
255ee743	112	Gitalist::Git::Util->new(
84f31a44	113	project => $self,
941bb5a1	114	);
941bb5a1	115	}
894bff59	116
b5b638f7	117	our $SHA1RE = qr/[0-9a-fA-F]{40}/;
894bff59	118
56b6dbe6	119	method _build_description {
4ce9e8a0	120	my $description = "";
d9a9b56b	121	eval {
b719ff6a	122	$description = $self->path->file('description')->slurp;
d9a9b56b	123	chomp $description;
d9a9b56b	124	};
56b6dbe6	125	return $description;
	126	}
	127
	128	method _build_owner {
b719ff6a	129	my ($gecos, $name) = (getpwuid $self->path->stat->uid)[6,0];
263e2578	130	$gecos =~ s/,+$//;
263e2578	131	return length($gecos) ? $gecos : $name;
56b6dbe6	132	}
29debefd	133
56b6dbe6	134	method _build_last_change {
	135	my $last_change;
	136	my $output = $self->run_cmd(
	137	qw{ for-each-ref --format=%(committer)
	138	--sort=-committerdate --count=1 refs/heads
	139	});
	140	if (my ($epoch, $tz) = $output =~ /\s(\d+)\s+([+-]\d+)$/) {
	141	my $dt = DateTime->from_epoch(epoch => $epoch);
	142	$dt->set_time_zone($tz);
	143	$last_change = $dt;
	144	}
	145	return $last_change;
	146	}
	147
894bff59	148	=head2 heads
	149
	150	Return an array containing the list of heads.
	151
	152	=cut
	153
8dbe8024	154	method heads {
	155	my $cmdout = $self->run_cmd(qw/for-each-ref --sort=-committerdate /, '--format=%(objectname)%00%(refname)%00%(committer)', 'refs/heads');
	156	my @output = $cmdout ? split(/\n/, $cmdout) : ();
	157	my @ret;
	158	for my $line (@output) {
	159	my ($rev, $head, $commiter) = split /\0/, $line, 3;
	160	$head =~ s!^refs/heads/!!;
	161
	162	push @ret, { sha1 => $rev, name => $head };
	163
	164	#FIXME: That isn't the time I'm looking for..
	165	if (my ($epoch, $tz) = $line =~ /\s(\d+)\s+([+-]\d+)$/) {
	166	my $dt = DateTime->from_epoch(epoch => $epoch);
	167	$dt->set_time_zone($tz);
	168	$ret[-1]->{last_change} = $dt;
	169	}
	170	}
	171
	172	return @ret;
	173	}
	174
894bff59	175	=head2 references
	176
	177	Return a hash of references.
	178
	179	=cut
	180
829d41ed	181	has references => ( isa => HashRef[ArrayRef[Str]], is => 'ro', lazy_build => 1 );
4111e151	182
b719ff6a	183	method _build_references {
4111e151	184
b719ff6a	185	# 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
	186	# c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
	187	my $cmdout = $self->run_cmd(qw(show-ref --dereference))
	188	or return;
	189	my @reflist = $cmdout ? split(/\n/, $cmdout) : ();
	190	my %refs;
	191	for(@reflist) {
	192	push @{$refs{$1}}, $2
	193	if m!^($SHA1RE)\srefs/(.*)$!;
	194	}
	195
	196	return \%refs;
	197	}
4111e151	198
4baaeeef	199	=head2 head_hash
	200
	201	Find the hash of a given head (defaults to HEAD).
	202
	203	=cut
	204
	205	method head_hash (Str $head?) {
	206	my $output = $self->run_cmd(qw/rev-parse --verify/, $head \|\| 'HEAD' );
	207	return unless defined $output;
	208
	209	my($sha1) = $output =~ /^($SHA1RE)$/;
	210	return $sha1;
	211	}
	212
a8a8f8f9	213	=head2 list_tree
	214
	215	Return an array of contents for a given tree.
	216	The tree is specified by sha1, and defaults to HEAD.
	217	The keys for each item will be:
	218
	219	mode
	220	type
	221	object
	222	file
	223
	224	=cut
	225
	226	method list_tree (Str $sha1?) {
	227	$sha1 \|\|= $self->head_hash;
	228
	229	my $output = $self->run_cmd(qw/ls-tree -z/, $sha1);
	230	return unless defined $output;
	231
	232	my @ret;
	233	for my $line (split /\0/, $output) {
	234	my ($mode, $type, $object, $file) = split /\s+/, $line, 4;
	235	push @ret, Object->new( mode => oct $mode,
	236	type => $type,
	237	sha1 => $object,
	238	file => $file,
50394a3e	239	project => $self,
a8a8f8f9	240	);
	241	}
	242	return @ret;
	243	}
	244
8bb7649b	245	method get_object (NonEmptySimpleStr $sha1) {
894bff59	246	unless ( $self->_is_valid_rev($sha1) ) {
8bb7649b	247	$sha1 = $self->head_hash($sha1);
8bb7649b	248	}
77edf882	249	return Object->new(
54368e9d	250	project => $self,
	251	sha1 => $sha1,
	252	);
	253	}
8bb7649b	254
894bff59	255	method _is_valid_rev (Str $rev) {
	256	return ($rev =~ /^($SHA1RE)$/);
	257	}
	258
54368e9d	259	# Should be in ::Object
54368e9d	260	method get_object_mode_string (Gitalist::Git::Object $object) {
894bff59	261	return $object->modestr;
54368e9d	262	}
54368e9d	263
894bff59	264	method get_object_type (NonEmptySimpleStr $sha1) {
894bff59	265	return $self->get_object($sha1)->type;
54368e9d	266	}
54368e9d	267
894bff59	268	method cat_file (NonEmptySimpleStr $sha1) {
894bff59	269	return $self->get_object($sha1)->contents;
54368e9d	270	}
	271
	272	method hash_by_path ($base, $path?, $type?) {
	273	$path \|\|= '';
	274	$path =~ s{/+$}();
	275
	276	my $output = $self->run_cmd('ls-tree', $base, '--', $path)
	277	or return;
	278	my($line) = $output ? split(/\n/, $output) : ();
	279
	280	#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa panic.c'
	281	$line =~ m/^([0-9]+) (.+) ($SHA1RE)\t/;
	282	return defined $type && $type ne $2
	283	? ()
	284	: $3;
	285	}
	286
4111e151	287	method list_revs ( NonEmptySimpleStr :$sha1!,
	288	Int :$count?,
	289	Int :$skip?,
	290	HashRef :$search?,
	291	NonEmptySimpleStr :$file?
	292	) {
	293	$sha1 = $self->head_hash($sha1)
	294	if !$sha1 \|\| $sha1 !~ $SHA1RE;
	295
	296	my @search_opts;
	297	if($search) {
	298	$search->{type} = 'grep'
	299	if $search->{type} eq 'commit';
	300	@search_opts = (
	301	# This seems a little fragile ...
	302	qq[--$search->{type}=$search->{text}],
	303	'--regexp-ignore-case',
	304	$search->{regexp} ? '--extended-regexp' : '--fixed-strings'
	305	);
	306	}
	307
	308	my $output = $self->run_cmd(
	309	'rev-list',
	310	'--header',
	311	(defined $count ? "--max-count=$count" : ()),
	312	(defined $skip ? "--skip=$skip" : ()),
	313	@search_opts,
	314	$sha1,
	315	'--',
	316	($file ? $file : ()),
	317	);
	318	return unless $output;
	319
	320	my @revs = $self->parse_rev_list($output);
	321
	322	return @revs;
	323	}
	324
	325	method parse_rev_list ($output) {
	326	return
	327	map $self->get_gpp_object($_),
894bff59	328	grep $self->_is_valid_rev($_),
4111e151	329	map split(/\n/, $_, 6), split /\0/, $output;
4111e151	330	}
54368e9d	331
77edf882	332	# XXX Ideally this would return a wee object instead of ad hoc structures.
	333	method diff ( Gitalist::Git::Object :$commit,
	334	Bool :$patch?,
fc948aee	335	Maybe[NonEmptySimpleStr] :$parent?,
77edf882	336	NonEmptySimpleStr :$file? ) {
	337	# Use parent if specifed, else take the parent from the commit
	338	# if there is only one, otherwise it was a merge commit.
	339	$parent = $parent
	340	? $parent
	341	: $commit->parents <= 1
	342	? $commit->parent_sha1
	343	: '-c';
	344	my @etc = (
	345	( $file ? ('--', $file) : () ),
	346	);
	347
	348	my @out = $self->raw_diff(
ba65bc52	349	( $patch ? '--patch-with-raw' : () ),
66a82e01	350	( $parent ? $parent : () ),
66a82e01	351	$commit->sha1, @etc,
77edf882	352	);
	353
	354	# XXX Yes, there is much wrongness having parse_diff_tree be destructive.
	355	my @difftree = $self->parse_diff_tree(\@out);
	356
	357	return \@difftree
	358	unless $patch;
	359
	360	# The blank line between the tree and the patch.
	361	shift @out;
	362
	363	# XXX And no I'm not happy about having diff return tree + patch.
	364	return \@difftree, [$self->parse_diff(@out)];
	365	}
	366
	367	method parse_diff (@diff) {
	368	my @ret;
	369	for (@diff) {
	370	# This regex is a little pathological.
	371	if(m{^diff --git (a/(.*?)) (b/\2)}) {
	372	push @ret, {
	373	head => $_,
	374	a => $1,
	375	b => $3,
	376	file => $2,
	377	diff => '',
	378	};
	379	next;
	380	}
	381
	382	if(/^index (\w+)\.\.(\w+) (\d+)$/) {
	383	@{$ret[-1]}{qw(index src dst mode)} = ($_, $1, $2, $3);
	384	next
	385	}
	386
	387	# XXX Somewhat hacky. Ahem.
	388	$ret[@ret ? -1 : 0]{diff} .= "$_\n";
	389	}
	390
	391	return @ret;
	392	}
	393
	394	# gitweb uses the following sort of command for diffing merges:
	395	# /home/dbrook/apps/bin/git --git-dir=/home/dbrook/dev/app/.git diff-tree -r -M --no-commit-id --patch-with-raw --full-index --cc 316cf158df3f6207afbae7270bcc5ba0 --
	396	# and for regular diffs
	397	# /home/dbrook/apps/bin/git --git-dir=/home/dbrook/dev/app/.git diff-tree -r -M --no-commit-id --patch-with-raw --full-index 2e3454ca0749641b42f063730b0090e1 316cf158df3f6207afbae7270bcc5ba0 --
	398
	399	method raw_diff (@args) {
	400	my $cmdout = $self->run_cmd(
	401	qw(diff-tree -r -M --no-commit-id --full-index),
	402	@args
	403	);
	404	return $cmdout ? split(/\n/, $cmdout) : ();
	405	}
	406
	407	method parse_diff_tree ($diff) {
	408	my @keys = qw(modesrc modedst sha1src sha1dst status src dst);
	409	my @ret;
	410	while (@$diff and $diff->[0] =~ /^:\d+/) {
	411	my $line = shift @$diff;
	412	# see. man git-diff-tree for more info
	413	# mode src, mode dst, sha1 src, sha1 dst, status, src[, dst]
	414	my @vals = $line =~ /^:(\d+) (\d+) ($SHA1RE) ($SHA1RE) ([ACDMRTUX]\d*)\t([^\t]+)(?:\t([^\n]+))?$/;
	415	my %line = zip @keys, @vals;
416	# Some convenience keys
417	$line{file} = $line{src};
418	$line{sha1} = $line{sha1dst};
419	$line{is_new} = $line{sha1src} =~ /^0+$/
420	if $line{sha1src};
421	@line{qw/status sim/} = $line{status} =~ /(R)(\d+)/
422	if $line{status} =~ /^R/;
423	push @ret, \%line;
424	}
425
426	return @ret;
427	}
54368e9d	428
d8abdf1c	429	method reflog (@logargs) {
	430	my @entries
	431	= $self->run_cmd(qw(log -g), @logargs)
	432	=~ /(^commit.+?(?:(?=^commit)\|(?=\z)))/msg;
	433
b719ff6a	434	# commit 02526fc15beddf2c64798a947fecdd8d11bf993d
	435	# Reflog: HEAD@{14} (The Git Server <git@git.dev.venda.com>)
	436	# Reflog message: push
	437	# Author: Foo Barsby <fbarsby@example.com>
	438	# Date: Thu Sep 17 12:26:05 2009 +0100
	439	#
	440	# Merge branch 'abc123'
d8abdf1c	441
	442	return map {
	443	# XXX Stuff like this makes me want to switch to Git::PurePerl
	444	my($sha1, $type, $author, $date)
	445	= m{
	446	^ commit \s+ ($SHA1RE)$
	447	.*?
	448	Reflog[ ]message: \s+ (.+?)$ \s+
	449	Author: \s+ ([^<]+) <.*?$ \s+
	450	Date: \s+ (.+?)$
	451	}xms;
	452
	453	pos($_) = index($_, $date) + length $date;
	454
	455	# Yeah, I just did that.
	456	my($msg) = /\G\s+(\S.*)/sg;
	457	{
	458	hash => $sha1,
	459	type => $type,
	460	author => $author,
	461
	462	# XXX Add DateTime goodness.
	463	date => $date,
	464	message => $msg,
	465	}
	466	;
	467	} @entries;
	468	}
	469
56b6dbe6	470	# Compatibility
56b6dbe6	471
caba5c95	472	=head2 info
56b6dbe6	473
	474	Returns a hash containing properties of this project. The keys will
	475	be:
	476
	477	name
	478	description (empty if .git/description is empty/unnamed)
	479	owner
	480	last_change
	481
	482	=cut
	483
caba5c95	484	method info {
56b6dbe6	485	return {
	486	name => $self->name,
	487	description => $self->description,
	488	owner => $self->owner,
	489	last_change => $self->last_change,
	490	};
	491	};
29debefd	492
b5b638f7	493	=head1 SEE ALSO
	494
	495	L<Gitalist::Git::Util> L<Gitalist::Git::Object>
	496
	497	=head1 AUTHORS AND COPYRIGHT
	498
	499	Catalyst application:
	500	(C) 2009 Venda Ltd and Dan Brook <dbrook@venda.com>
	501
	502	Original gitweb.cgi from which this was derived:
	503	(C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
	504	(C) 2005, Christian Gierke
	505
	506	=head1 LICENSE
	507
	508	FIXME - Is this going to be GPLv2 as per gitweb? If so this is broken..
	509
	510	This library is free software. You can redistribute it and/or modify
	511	it under the same terms as Perl itself.
	512
	513	=cut
	514
56b6dbe6	515	} # end class