rev-parse: introduce --is-bare-repository

Signed-off-by: Matthias Lederhofer <matled@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-rev-parse.txt

@@ -93,6 +93,9 @@ OPTIONS
 	When the current working directory is below the repository
 	directory print "true", otherwise "false".
 
+--is-bare-repository::
+	When the repository is bare print "true", otherwise "false".
+
 --short, --short=number::
 	Instead of outputting the full SHA1 values of object names try to
 	abbreviate them to a shorter unique name. When no length is specified

builtin-rev-parse.c

@@ -352,6 +352,11 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 						: "false");
 				continue;
 			}
+			if (!strcmp(arg, "--is-bare-repository")) {
+				printf("%s\n", is_bare_repository() ? "true"
+						: "false");
+				continue;
+			}
 			if (!prefixcmp(arg, "--since=")) {
 				show_datestring("--max-age=", arg+8);
 				continue;

git-sh-setup.sh

@@ -29,11 +29,7 @@ set_reflog_action() {
 }
 
 is_bare_repository () {
-	git-config --bool --get core.bare ||
-	case "$GIT_DIR" in
-	.git | */.git) echo false ;;
-	*) echo true ;;
-	esac
+	git-rev-parse --is-bare-repository
 }
 
 cd_to_toplevel () {

git-svn.perl

@@ -594,8 +594,7 @@ sub post_fetch_checkout {
 	my $index = $ENV{GIT_INDEX_FILE} || "$ENV{GIT_DIR}/index";
 	return if -f $index;
 
-	chomp(my $bare = `git config --bool --get core.bare`);
-	return if $bare eq 'true';
+	return if command_oneline(qw/rev-parse --is-bare-repository/) eq 'true';
 	return if command_oneline(qw/rev-parse --is-inside-git-dir/) eq 'true';
 	command_noisy(qw/read-tree -m -u -v HEAD HEAD/);
 	print STDERR "Checked out HEAD:\n  ",