[PATCH v3 1/3] rev-parse: exit with non-zero status if ref@{n} is not valid.

[Jon Seymour <jon.seymour@gmail.com>]

>From Junio's e-mail:

"The current behaviour of ref@{...} syntax parser is suboptimal:

    $ git rev-parse --verify jch@{99999} && echo true
    warning: Log for 'jch' only has 1368 entries.
    cfb88e9a8d4926b0011ae2dd67e1f57a98f4b768
    true

It even knows that it is running off the cut-off point; it should just
cause the caller to notice that fact.  I don't think changing it to error
out should cause any harm to existing callers."

With this change:

   $ git rev-parse --verify jch@{99999} || echo false
   fatal: Log for 'jch' only has 1368 entries.
   false

   $ git rev-parse jch@{99999} || echo false
   fatal: Log for 'jch' only has 1368 entries.
   false

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
---
 sha1_name.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/sha1_name.c b/sha1_name.c
index 4af94fa..10a4efe 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -430,10 +430,13 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
 					"warning: Log for '%.*s' only goes "
 					"back to %s.\n", len, str,
 					show_date(co_time, co_tz, DATE_RFC2822));
-			else
-				fprintf(stderr,
-					"warning: Log for '%.*s' only has "
-					"%d entries.\n", len, str, co_cnt);
+			else {
+				free(real_ref);
+				die("Log for '%.*s' only has %d entries.",
+						len,
+						str,
+						co_cnt);
+			}
 		}
 	}
 
-- 
1.7.2.1.100.gceecd