Git.pm: Add remote_refs() git-ls-remote frontend

This patch also converts the good ole' git-remote.perl to use it.
It is otherwise used in the repo.or.cz machinery and I guess other
scripts might find it useful too.

Unfortunately,

	git-ls-remote --heads .

is subtly different from

	git-ls-remote . refs/heads/

(since the second matches anywhere in the string, not just at the
beginning) so we have to provide interface for both.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/contrib/examples/git-remote.perl b/contrib/examples/git-remote.perl
index b30ed734e7102b6a5d88c01364fa7d18db8f8bfe..36bd54c985080f8dd5558a3e7a4e19ede9fbab93 100755 (executable)
--- a/contrib/examples/git-remote.perl
+++ b/contrib/examples/git-remote.perl
@@ -129,10 +129,7 @@ sub update_ls_remote {
        return if (($harder == 0) ||
                   (($harder == 1) && exists $info->{'LS_REMOTE'}));
 
-       my @ref = map {
-               s|^[0-9a-f]{40}\s+refs/heads/||;
-               $_;
-       } $git->command(qw(ls-remote --heads), $info->{'URL'});
+       my @ref = map { s|refs/heads/||; $_; } keys %{$git->remote_refs($info->{'URL'}, [ 'heads' ])};
        $info->{'LS_REMOTE'} = \@ref;
 }
 

diff --git a/perl/Git.pm b/perl/Git.pm
index 97e61efaff240a60ecd25ba68d391e75ed7ce958..d99e7782002e01079b3866003cc8555b7e130e3f 100644 (file)
--- a/perl/Git.pm
+++ b/perl/Git.pm
@@ -56,7 +56,8 @@ require Exporter;
 @EXPORT_OK = qw(command command_oneline command_noisy
                 command_output_pipe command_input_pipe command_close_pipe
                 command_bidi_pipe command_close_bidi_pipe
-                version exec_path hash_object git_cmd_try);
+                version exec_path hash_object git_cmd_try
+                remote_refs);
 
 
 =head1 DESCRIPTION
@@ -668,6 +669,59 @@ sub get_color {
        return $color;
 }
 
+=item remote_refs ( REPOSITORY [, GROUPS [, REFGLOBS ] ] )
+
+This function returns a hashref of refs stored in a given remote repository.
+The hash is in the format C<refname =\> hash>. For tags, the C<refname> entry
+contains the tag object while a C<refname^{}> entry gives the tagged objects.
+
+C<REPOSITORY> has the same meaning as the appropriate C<git-ls-remote>
+argument; either an URL or a remote name (if called on a repository instance).
+C<GROUPS> is an optional arrayref that can contain 'tags' to return all the
+tags and/or 'heads' to return all the heads. C<REFGLOB> is an optional array
+of strings containing a shell-like glob to further limit the refs returned in
+the hash; the meaning is again the same as the appropriate C<git-ls-remote>
+argument.
+
+This function may or may not be called on a repository instance. In the former
+case, remote names as defined in the repository are recognized as repository
+specifiers.
+
+=cut
+
+sub remote_refs {
+       my ($self, $repo, $groups, $refglobs) = _maybe_self(@_);
+       my @args;
+       if (ref $groups eq 'ARRAY') {
+               foreach (@$groups) {
+                       if ($_ eq 'heads') {
+                               push (@args, '--heads');
+                       } elsif ($_ eq 'tags') {
+                               push (@args, '--tags');
+                       } else {
+                               # Ignore unknown groups for future
+                               # compatibility
+                       }
+               }
+       }
+       push (@args, $repo);
+       if (ref $refglobs eq 'ARRAY') {
+               push (@args, @$refglobs);
+       }
+
+       my @self = $self ? ($self) : (); # Ultra trickery
+       my ($fh, $ctx) = Git::command_output_pipe(@self, 'ls-remote', @args);
+       my %refs;
+       while (<$fh>) {
+               chomp;
+               my ($hash, $ref) = split(/\t/, $_, 2);
+               $refs{$ref} = $hash;
+       }
+       Git::command_close_pipe(@self, $fh, $ctx);
+       return \%refs;
+}
+
+
 =item ident ( TYPE | IDENTSTR )
 
 =item ident_person ( TYPE | IDENTSTR | IDENTARRAY )