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authorJunio C Hamano <gitster@pobox.com>2013-06-02 15:59:49 -0700
committerJunio C Hamano <gitster@pobox.com>2013-06-02 15:59:49 -0700
commit4de1179afcb1105a43cf167b513afda42c4f152d (patch)
tree97303fdf5a83bdefec918e2fd6aa7779133729e7
parent103093a0a80c385d17571a9c6da7b6c03227c767 (diff)
parente00dd1e9485c50f202cc97dfae19d510e108b565 (diff)
downloadgit-4de1179afcb1105a43cf167b513afda42c4f152d.tar.gz
git-4de1179afcb1105a43cf167b513afda42c4f152d.tar.xz
Merge branch 'mc/describe-first-parent'
* mc/describe-first-parent: describe: Add --first-parent option
-rw-r--r--Documentation/git-describe.txt9
-rw-r--r--builtin/describe.c5
-rwxr-xr-xt/t6120-describe.sh3
3 files changed, 16 insertions, 1 deletions
diff --git a/Documentation/git-describe.txt b/Documentation/git-describe.txt
index 28e5ec0e2..9439cd6d5 100644
--- a/Documentation/git-describe.txt
+++ b/Documentation/git-describe.txt
@@ -88,6 +88,11 @@ OPTIONS
--always::
Show uniquely abbreviated commit object as fallback.
+--first-parent::
+ Follow only the first parent commit upon seeing a merge commit.
+ This is useful when you wish to not match tags on branches merged
+ in the history of the target commit.
+
EXAMPLES
--------
@@ -149,7 +154,9 @@ is found, its name will be output and searching will stop.
If an exact match was not found, 'git describe' will walk back
through the commit history to locate an ancestor commit which
has been tagged. The ancestor's tag will be output along with an
-abbreviation of the input committish's SHA-1.
+abbreviation of the input committish's SHA-1. If '--first-parent' was
+specified then the walk will only consider the first parent of each
+commit.
If multiple tags were found during the walk then the tag which
has the fewest commits different from the input committish will be
diff --git a/builtin/describe.c b/builtin/describe.c
index 6636a68cd..ad8471626 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -21,6 +21,7 @@ static int debug; /* Display lots of verbose info */
static int all; /* Any valid ref can be used */
static int tags; /* Allow lightweight tags */
static int longformat;
+static int first_parent;
static int abbrev = -1; /* unspecified */
static int max_candidates = 10;
static struct hash_table names;
@@ -336,6 +337,9 @@ static void describe(const char *arg, int last_one)
commit_list_insert_by_date(p, &list);
p->object.flags |= c->object.flags;
parents = parents->next;
+
+ if (first_parent)
+ break;
}
}
@@ -404,6 +408,7 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
OPT_BOOLEAN(0, "all", &all, N_("use any ref")),
OPT_BOOLEAN(0, "tags", &tags, N_("use any tag, even unannotated")),
OPT_BOOLEAN(0, "long", &longformat, N_("always use long format")),
+ OPT_BOOLEAN(0, "first-parent", &first_parent, N_("only follow first parent")),
OPT__ABBREV(&abbrev),
OPT_SET_INT(0, "exact-match", &max_candidates,
N_("only output exact matches"), 0),
diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh
index f67aa6ff6..a25729f2a 100755
--- a/t/t6120-describe.sh
+++ b/t/t6120-describe.sh
@@ -110,6 +110,9 @@ check_describe tags/e --all HEAD^^^
check_describe B-0-* --long HEAD^^2^
check_describe A-3-* --long HEAD^^2
+check_describe c-7-* --tags
+check_describe e-3-* --first-parent --tags
+
: >err.expect
check_describe A --all A^0
test_expect_success 'no warning was displayed for A' '