[PATCH] branch: honor core.abbrev

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Honor 'core.abbrev' configuration unless user specifies the
length on command line. In order to do that, we need to set
'abbrev' to DEFAULT_ABBREV after config and command line
parsing done.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx>
---
 Documentation/git-branch.txt |    1 +
 builtin/branch.c             |    5 ++++-
 2 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index c50f189..906cccc 100644
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -114,6 +114,7 @@ OPTIONS
 --abbrev=<length>::
 	Alter the sha1's minimum display length in the output listing.
 	The default value is 7.
+	(and can be overrided by the `core.abbrev` config option).
 
 --no-abbrev::
 	Display the full sha1s in the output listing rather than abbreviating them.
diff --git a/builtin/branch.c b/builtin/branch.c
index d6ab93b..5a15022 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -613,7 +613,7 @@ static int opt_parse_merge_filter(const struct option *opt, const char *arg, int
 int cmd_branch(int argc, const char **argv, const char *prefix)
 {
 	int delete = 0, rename = 0, force_create = 0;
-	int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
+	int verbose = 0, abbrev = -1, detached = 0;
 	int reflog = 0;
 	enum branch_track track;
 	int kinds = REF_LOCAL_BRANCH;
@@ -696,6 +696,9 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 	if (!!delete + !!rename + !!force_create > 1)
 		usage_with_options(builtin_branch_usage, options);
 
+	if (abbrev == -1)
+		abbrev = DEFAULT_ABBREV;
+
 	if (delete)
 		return delete_branches(argc, argv, delete > 1, kinds);
 	else if (argc == 0)
-- 
1.7.6

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