When `git describe` uses `--match`, it matches only tags, basically
ignoring the `--all` argument even when it is specified.

Fix it by also matching branch name and $remote_name/$remote_branch_name,
for remote-tracking references, with the specified patterns. Update
documentation accordingly and add tests.

Signed-off-by: Max Kirillov <m...@max630.net>
---
Changed to use skip_prefix(). Calculate path_to_match only once.

Add case of discarding unknown type with exclude
 Documentation/git-describe.txt | 24 ++++++++++++++----------
 builtin/describe.c             | 29 +++++++++++++++++------------
 t/t6120-describe.sh            | 27 +++++++++++++++++++++++++++
 3 files changed, 58 insertions(+), 22 deletions(-)

diff --git a/Documentation/git-describe.txt b/Documentation/git-describe.txt
index 26f19d3b07..c924c945ba 100644
--- a/Documentation/git-describe.txt
+++ b/Documentation/git-describe.txt
@@ -87,19 +87,23 @@ OPTIONS
 
 --match <pattern>::
        Only consider tags matching the given `glob(7)` pattern,
-       excluding the "refs/tags/" prefix.  This can be used to avoid
-       leaking private tags from the repository. If given multiple times, a
-       list of patterns will be accumulated, and tags matching any of the
-       patterns will be considered. Use `--no-match` to clear and reset the
-       list of patterns.
+       excluding the "refs/tags/" prefix. If used with `--all`, it also
+       considers local branches and remote-tracking references matching the
+       pattern, excluding respectively "refs/heads/" and "refs/remotes/"
+       prefix; references of other types are never considered. If given
+       multiple times, a list of patterns will be accumulated, and tags
+       matching any of the patterns will be considered.  Use `--no-match` to
+       clear and reset the list of patterns.
 
 --exclude <pattern>::
        Do not consider tags matching the given `glob(7)` pattern, excluding
-       the "refs/tags/" prefix. This can be used to narrow the tag space and
-       find only tags matching some meaningful criteria. If given multiple
-       times, a list of patterns will be accumulated and tags matching any
-       of the patterns will be excluded. When combined with --match a tag will
-       be considered when it matches at least one --match pattern and does not
+       the "refs/tags/" prefix. If used with `--all`, it also does not consider
+       local branches and remote-tracking references matching the pattern,
+       excluding respectively "refs/heads/" and "refs/remotes/" prefix;
+       references of other types are never considered. If given multiple times,
+       a list of patterns will be accumulated and tags matching any of the
+       patterns will be excluded. When combined with --match a tag will be
+       considered when it matches at least one --match pattern and does not
        match any of the --exclude patterns. Use `--no-exclude` to clear and
        reset the list of patterns.
 
diff --git a/builtin/describe.c b/builtin/describe.c
index 42afa1e244..f15b6e531d 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -129,13 +129,24 @@ static void add_to_known_names(const char *path,
 
 static int get_name(const char *path, const struct object_id *oid, int flag, 
void *cb_data)
 {
-       int is_tag = starts_with(path, "refs/tags/");
+       int is_tag = 0;
        struct object_id peeled;
        int is_annotated, prio;
-
-       /* Reject anything outside refs/tags/ unless --all */
-       if (!all && !is_tag)
+       const char *path_to_match = NULL;
+
+       if (skip_prefix(path, "refs/tags/", &path_to_match)) {
+               is_tag = 1;
+       } else if (all) {
+               if ((exclude_patterns.nr || patterns.nr) &&
+                   !skip_prefix(path, "refs/heads/", &path_to_match) &&
+                   !skip_prefix(path, "refs/remotes/", &path_to_match)) {
+                       /* Only accept reference of known type if there are 
match/exclude patterns */
+                       return 0;
+               }
+       } else {
+               /* Reject anything outside refs/tags/ unless --all */
                return 0;
+       }
 
        /*
         * If we're given exclude patterns, first exclude any tag which match
@@ -144,11 +155,8 @@ static int get_name(const char *path, const struct 
object_id *oid, int flag, voi
        if (exclude_patterns.nr) {
                struct string_list_item *item;
 
-               if (!is_tag)
-                       return 0;
-
                for_each_string_list_item(item, &exclude_patterns) {
-                       if (!wildmatch(item->string, path + 10, 0))
+                       if (!wildmatch(item->string, path_to_match, 0))
                                return 0;
                }
        }
@@ -161,11 +169,8 @@ static int get_name(const char *path, const struct 
object_id *oid, int flag, voi
                int found = 0;
                struct string_list_item *item;
 
-               if (!is_tag)
-                       return 0;
-
                for_each_string_list_item(item, &patterns) {
-                       if (!wildmatch(item->string, path + 10, 0)) {
+                       if (!wildmatch(item->string, path_to_match, 0)) {
                                found = 1;
                                break;
                        }
diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh
index 25110ea55d..0a8f754100 100755
--- a/t/t6120-describe.sh
+++ b/t/t6120-describe.sh
@@ -190,6 +190,33 @@ check_describe "test1-lightweight-*" --long --tags 
--match="test1-*" --match="te
 
 check_describe "test1-lightweight-*" --long --tags --match="test3-*" 
--match="test1-*" HEAD
 
+test_expect_success 'set-up branches' '
+       git branch branch_A A &&
+       git branch branch_C c &&
+       git update-ref refs/remotes/origin/remote_branch_A "A^{commit}" &&
+       git update-ref refs/remotes/origin/remote_branch_C "c^{commit}" &&
+       git update-ref refs/original/original_branch_A test-annotated~2
+'
+
+check_describe "heads/branch_A*" --all --match="branch_*" --exclude="branch_C" 
HEAD
+
+check_describe "remotes/origin/remote_branch_A*" --all 
--match="origin/remote_branch_*" --exclude="origin/remote_branch_C" HEAD
+
+check_describe "original/original_branch_A*" --all test-annotated~1
+
+test_expect_success '--match does not work for other types' '
+       test_must_fail git describe --all --match="*original_branch_*" 
test-annotated~1
+'
+
+test_expect_success '--exclude does not work for other types' '
+       R=$(git describe --all --exclude="any_pattern_even_not_matching" 
test-annotated~1) &&
+       case "$R" in
+       *original_branch_A*) echo "fail: Found unknown reference $R with 
--exclude"
+               false;;
+       *) echo ok: Found some known type;;
+       esac
+'
+
 test_expect_success 'name-rev with exact tags' '
        echo A >expect &&
        tag_object=$(git rev-parse refs/tags/A) &&
-- 
2.11.0.1122.gc3fec58.dirty

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