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[PATCH] If abbrev is set to zero in git-describe, don't add the unique suffix

From
APAndy Parkins <andyparkins@gmail.com>
Date
Jan 26, 2007, 14:28 UTC
Message-ID
<200701261428.55838.andyparkins@gmail.com>
In-Reply-To
<200701261036.26012.andyparkins@gmail.com>
When on a non-tag commit, git-describe normally outputs descriptions of
the form
  v1.0.0-g1234567890
Some scripts (for example the update hook script) might just want to
know the name of the nearest tag, so they then have to do
 x=$(git-describe HEAD | sed 's/-g*//')
This is costly, but more importantly is fragile as it is relying on the
output format of git-describe, which we would then have to maintain
forever.

This patch adds support for setting the --abbrev option to zero. In that case git-describe does as it always has, but outputs only the nearest found tag instead of a completely unique name. This means that scripts would not have to parse the output format and won't need changing if the git-describe suffix is ever changed.

Signed-off-by: Andy Parkins <andyparkins@gmail.com>
---
 builtin-describe.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/builtin-describe.c b/builtin-describe.c
index 4921eee..f3ac2d5 100644
--- a/builtin-describe.c
+++ b/builtin-describe.c
@@ -188,8 +188,11 @@ static void describe(const char *arg, int last_one)
 				sha1_to_hex(gave_up_on->object.sha1));
 		}
 	}
-	printf("%s-g%s\n", all_matches[0].name->path,
-		   find_unique_abbrev(cmit->object.sha1, abbrev));
+	if (abbrev == 0)
+		printf("%s\n", all_matches[0].name->path );
+	else
+		printf("%s-g%s\n", all_matches[0].name->path,
+			   find_unique_abbrev(cmit->object.sha1, abbrev));
 
 	if (!last_one)
 		clear_commit_marks(cmit, -1);
@@ -212,7 +215,7 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
 			tags = 1;
 		else if (!strncmp(arg, "--abbrev=", 9)) {
 			abbrev = strtoul(arg + 9, NULL, 10);
-			if (abbrev < MINIMUM_ABBREV || 40 < abbrev)
+			if (abbrev != 0 && (abbrev < MINIMUM_ABBREV || 40 < abbrev))
 				abbrev = DEFAULT_ABBREV;
 		}
 		else if (!strncmp(arg, "--candidates=", 13)) {
-- 
1.5.0.rc2.gc3537-dirty
Previous: Andy ParkinsNext: Jakub Narebski
Message 13 of 15 in “Teach git-describe to display distances from tags.”
  1. 1/2 Teach git-describe to display distances from tags.Shawn O. Pearce, Jan 25, 2007
  2. Junio C HamanoJan 25, 2007
  3. Shawn O. PearceJan 25, 2007
  4. Junio C HamanoJan 25, 2007
  5. Shawn O. PearceJan 25, 2007
  6. Nicolas PitreJan 25, 2007
  7. Junio C HamanoJan 26, 2007
  8. Francis MoreauJan 26, 2007
  9. Junio C HamanoJan 26, 2007
  10. Francis MoreauJan 26, 2007
  11. Shawn O. PearceJan 26, 2007
  12. Andy ParkinsJan 26, 2007
  13. If abbrev is set to zero in git-describe, don't add the unique suffixAndy Parkins, Jan 26, 2007
  14. Jakub NarebskiJan 26, 2007
  15. Matthias LederhoferJan 26, 2007

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