[PATCH 4/5] name-rev: strip trailing ^0 in when --name-only

[Ramkumar Ramachandra <artagnon@gmail.com>]

236157 (Teach git-describe how to run name-rev, 2007-05-21) introduced
`git name-rev --name-only`, with the intent of using it to implement
`git describe --contains`.  According to the message, one of the primary
objectives of --name-only was to make the output of name-rev match that
of describe.

  $ git describe --contains --all master
  master

  $ git describe --contains --all master~1
  master~1

  $ git describe --contains --all v1.8.3~1
  v1.8.3~1

  $ git describe --contains --all v1.8.3
  v1.8.3^0

The last invocation unnecessarily prints a trailing "^0" (--stdin does
not suffer from this defect).  Fix this.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 builtin/name-rev.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/builtin/name-rev.c b/builtin/name-rev.c
index 524d790..4b17209 100644
--- a/builtin/name-rev.c
+++ b/builtin/name-rev.c
@@ -160,7 +160,15 @@ static void show_name(const struct object *obj,
 	if (!name_only)
 		printf("%s ", caller_name ? caller_name : sha1_to_hex(sha1));
 	name = get_rev_name(obj);
-	if (name)
+
+	if (name && name_only) {
+		/* strip possible trailing ^0 from name */
+		int len = strlen(name);
+		if (len > 2 && !strcmp(name + len - 2, "^0"))
+			len -= 2;
+		printf("%.*s\n", len, name);
+	}
+	else if (name)
 		printf("%s\n", name);
 	else if (allow_undefined)
 		printf("undefined\n");
-- 
1.8.3.1.456.gb7f4cb6.dirty