[PATCH 1/2] Add [-s|--hash] option to Linus' show-ref.

@@ -3,9 +3,10 @@ #include "refs.h"
 #include "object.h"
 #include "tag.h"
 
-static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--deref] [--tags] [--heads] [--] [pattern*]";
+static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--deref] [-s|--hash] [--tags] [--heads] [--] [pattern*]";
 
-static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0, found_match = 0, verify = 0, quiet = 0;
+static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0,
+	found_match = 0, verify = 0, quiet = 0, hash_only = 0;
 static const char **pattern;
 
 static int show_ref(const char *refname, const unsigned char *sha1)

@@ -50,7 +51,10 @@ match:
 	}
 	if (quiet)
 		return 0;
-	printf("%s %s\n", sha1_to_hex(sha1), refname);
+	if (hash_only)
+		printf("%s\n", sha1_to_hex(sha1));
+	else
+		printf("%s %s\n", sha1_to_hex(sha1), refname);
 	if (deref_tags && obj->type == OBJ_TAG) {
 		obj = deref_tag(obj, refname, 0);
 		printf("%s %s^{}\n", sha1_to_hex(obj->sha1), refname);

@@ -86,6 +90,10 @@ int cmd_show_ref(int argc, const char **
 			deref_tags = 1;
 			continue;
 		}
+		if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) {
+			hash_only = 1;
+			continue;
+		}
 		if (!strcmp(arg, "--verify")) {
 			verify = 1;
 			continue;

@@ -21,7 +21,7 @@ delete_branch () {
 	,,)
 	    die "What branch are you on anyway?" ;;
 	esac
-	branch=$(cat "$GIT_DIR/refs/heads/$branch_name") &&
+	branch=$(git-show-ref --verify --hash -- "refs/heads/$branch_name") &&
 	    branch=$(git-rev-parse --verify "$branch^0") ||
 		die "Seriously, what branch are you talking about?"
 	case "$option" in

@@ -112,7 +112,7 @@ rev=$(git-rev-parse --verify "$head") ||
 git-check-ref-format "heads/$branchname" ||
 	die "we do not like '$branchname' as a branch name."
 
-if [ -e "$GIT_DIR/refs/heads/$branchname" ]
+if git-show-ref --verify --quiet -- "refs/heads/$branchname"
 then
 	if test '' = "$force"
 	then