[PATCH 15/15] do_for_each_ref(): only iterate over the subtree that was requested

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From: Michael Haggerty <mhagger@xxxxxxxxxxxx>

If the base argument has a "/" chararacter, then only iterate over the
reference subdir whose name is the part up to the last "/".

Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
---
 refs.c |   35 ++++++++++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/refs.c b/refs.c
index cdfb53d..f97a256 100644
--- a/refs.c
+++ b/refs.c
@@ -1144,13 +1144,34 @@ static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn
 			   int trim, int flags, void *cb_data)
 {
 	struct ref_cache *refs = get_ref_cache(submodule);
-	struct ref_dir *packed_refs = get_packed_refs(refs);
-	struct ref_dir *loose_refs = get_loose_refs(refs);
-	sort_ref_dir(packed_refs);
-	sort_ref_dir(loose_refs);
-	return do_for_each_ref_in_dirs(packed_refs,
-				       loose_refs,
-				       base, fn, trim, flags, cb_data);
+	struct ref_dir *packed_dir = get_packed_refs(refs);
+	struct ref_dir *loose_dir = get_loose_refs(refs);
+	int retval = 0;
+
+	if (base && *base) {
+		packed_dir = find_containing_dir(packed_dir, base, 0);
+		loose_dir = find_containing_dir(loose_dir, base, 0);
+	}
+
+	if (packed_dir && loose_dir) {
+		sort_ref_dir(packed_dir);
+		sort_ref_dir(loose_dir);
+		retval = do_for_each_ref_in_dirs(
+				packed_dir, loose_dir,
+				base, fn, trim, flags, cb_data);
+	} else if (packed_dir) {
+		sort_ref_dir(packed_dir);
+		retval = do_for_each_ref_in_dir(
+				packed_dir, 0,
+				base, fn, trim, flags, cb_data);
+	} else if (loose_dir) {
+		sort_ref_dir(loose_dir);
+		retval = do_for_each_ref_in_dir(
+				loose_dir, 0,
+				base, fn, trim, flags, cb_data);
+	}
+
+	return retval;
 }
 
 static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data)
-- 
1.7.10

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