[PATCH 2/2] refs: fix some exclude patterns being ignored

["Rafael Ascensão" <rafa.almas@gmail.com>]

`--exclude` from rev-list and rev-parse fails to exclude references if
the next `--branches`, `--tags` or `--remotes` use the optional
inclusive glob because those options are implemented as particular cases
of `--glob=`, which itself requires that exclude patterns begin with
'refs/'.

But it makes sense for `--branches=glob` and friends to be aware that
exclusions patterns for them shouldn't be 'refs/<type>/' prefixed, the
same way exclude patterns for `--branches` and friends (without the
optional glob) already are.

Let's record in 'refs.c:struct ref_filter' which context the exclude
pattern is tied to, so refs.c:filter_refs() can decide if it should
ignore the prefix when trying to match.

Signed-off-by: Rafael Ascensão <rafa.almas@gmail.com>
---
 refs.c                   |  4 ++++
 t/t6018-rev-list-glob.sh | 24 ++++++++++++------------
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/refs.c b/refs.c
index de81c7be7c..539f385f61 100644
--- a/refs.c
+++ b/refs.c
@@ -217,6 +217,7 @@ char *resolve_refdup(const char *refname, int resolve_flags,
 /* The argument to filter_refs */
 struct ref_filter {
 	const char *pattern;
+	const char *prefix;
 	each_ref_fn *fn;
 	void *cb_data;
 };
@@ -296,6 +297,8 @@ static int filter_refs(const char *refname, const struct object_id *oid,
 
 	if (wildmatch(filter->pattern, refname, 0))
 		return 0;
+	if (filter->prefix)
+		skip_prefix(refname, filter->prefix, &refname);
 	return filter->fn(refname, oid, flags, filter->cb_data);
 }
 
@@ -458,6 +461,7 @@ int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
 	}
 
 	filter.pattern = real_pattern.buf;
+	filter.prefix = prefix;
 	filter.fn = fn;
 	filter.cb_data = cb_data;
 	ret = for_each_ref(filter_refs, &filter);
diff --git a/t/t6018-rev-list-glob.sh b/t/t6018-rev-list-glob.sh
index 8e2b136356..7dc6cbdc42 100755
--- a/t/t6018-rev-list-glob.sh
+++ b/t/t6018-rev-list-glob.sh
@@ -147,51 +147,51 @@ test_expect_success 'rev-parse accumulates multiple --exclude' '
 	compare rev-parse "--exclude=refs/remotes/* --exclude=refs/tags/* --all" --branches
 '
 
-test_expect_failure 'rev-parse --exclude=glob with --branches=glob' '
+test_expect_success 'rev-parse --exclude=glob with --branches=glob' '
 	compare rev-parse "--exclude=subspace-* --branches=sub*" "subspace/one subspace/two"
 '
 
-test_expect_failure 'rev-parse --exclude=glob with --tags=glob' '
+test_expect_success 'rev-parse --exclude=glob with --tags=glob' '
 	compare rev-parse "--exclude=qux/? --tags=qux/*" "qux/one qux/two"
 '
 
-test_expect_failure 'rev-parse --exclude=glob with --remotes=glob' '
+test_expect_success 'rev-parse --exclude=glob with --remotes=glob' '
 	compare rev-parse "--exclude=upstream/? --remotes=upstream/*" "upstream/one upstream/two"
 '
 
-test_expect_failure 'rev-parse --exclude=ref with --branches=glob' '
+test_expect_success 'rev-parse --exclude=ref with --branches=glob' '
 	compare rev-parse "--exclude=subspace-x --branches=sub*" "subspace/one subspace/two"
 '
 
-test_expect_failure 'rev-parse --exclude=ref with --tags=glob' '
+test_expect_success 'rev-parse --exclude=ref with --tags=glob' '
 	compare rev-parse "--exclude=qux/x --tags=qux/*" "qux/one qux/two"
 '
 
-test_expect_failure 'rev-parse --exclude=ref with --remotes=glob' '
+test_expect_success 'rev-parse --exclude=ref with --remotes=glob' '
 	compare rev-parse "--exclude=upstream/x --remotes=upstream/*" "upstream/one upstream/two"
 '
 
-test_expect_failure 'rev-list --exclude=glob with --branches=glob' '
+test_expect_success 'rev-list --exclude=glob with --branches=glob' '
 	compare rev-list "--exclude=subspace-* --branches=sub*" "subspace/one subspace/two"
 '
 
-test_expect_failure 'rev-list --exclude=glob with --tags=glob' '
+test_expect_success 'rev-list --exclude=glob with --tags=glob' '
 	compare rev-list "--exclude=qux/? --tags=qux/*" "qux/one qux/two"
 '
 
-test_expect_failure 'rev-list --exclude=glob with --remotes=glob' '
+test_expect_success 'rev-list --exclude=glob with --remotes=glob' '
 	compare rev-list "--exclude=upstream/? --remotes=upstream/*" "upstream/one upstream/two"
 '
 
-test_expect_failure 'rev-list --exclude=ref with --branches=glob' '
+test_expect_success 'rev-list --exclude=ref with --branches=glob' '
 	compare rev-list "--exclude=subspace-x --branches=sub*" "subspace/one subspace/two"
 '
 
-test_expect_failure 'rev-list --exclude=ref with --tags=glob' '
+test_expect_success 'rev-list --exclude=ref with --tags=glob' '
 	compare rev-list "--exclude=qux/x --tags=qux/*" "qux/one qux/two"
 '
 
-test_expect_failure 'rev-list --exclude=ref with --remotes=glob' '
+test_expect_success 'rev-list --exclude=ref with --remotes=glob' '
 	compare rev-list "--exclude=upstream/x --remotes=upstream/*" "upstream/one upstream/two"
 '
 
-- 
2.19.1