[PATCH 3/3] gc: Remove garbage .idx files from pack dir

[Doug Kelly <dougk.ff7@gmail.com>]

Add a custom report_garbage handler to collect and remove garbage
.idx files from the pack directory.

Signed-off-by: Doug Kelly <dougk.ff7@gmail.com>
---
 builtin/gc.c     | 20 ++++++++++++++++++++
 t/t5304-prune.sh |  2 +-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/builtin/gc.c b/builtin/gc.c
index df3e454..668f975 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -45,6 +45,21 @@ static struct argv_array rerere = ARGV_ARRAY_INIT;
 
 static struct tempfile pidfile;
 static struct lock_file log_lock;
+static struct string_list pack_garbage = STRING_LIST_INIT_DUP;
+
+static void clean_pack_garbage(void)
+{
+	int i;
+	for (i = 0; i < pack_garbage.nr; i++)
+		unlink_or_warn(pack_garbage.items[i].string);
+	string_list_clear(&pack_garbage, 0);
+}
+
+static void report_pack_garbage(unsigned seen_bits, const char *path)
+{
+	if (seen_bits == PACKDIR_FILE_IDX)
+		string_list_append(&pack_garbage, path);
+}
 
 static void git_config_date_string(const char *key, const char **output)
 {
@@ -416,6 +431,11 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 	if (run_command_v_opt(rerere.argv, RUN_GIT_CMD))
 		return error(FAILED_RUN, rerere.argv[0]);
 
+	report_garbage = report_pack_garbage;
+	reprepare_packed_git();
+	if (pack_garbage.nr > 0)
+		clean_pack_garbage();
+
 	if (auto_gc && too_many_loose_objects())
 		warning(_("There are too many unreachable loose objects; "
 			"run 'git prune' to remove them."));
diff --git a/t/t5304-prune.sh b/t/t5304-prune.sh
index 0297515..def203c 100755
--- a/t/t5304-prune.sh
+++ b/t/t5304-prune.sh
@@ -245,7 +245,7 @@ EOF
 	test_cmp expected actual
 '
 
-test_expect_failure 'clean pack garbage with gc' '
+test_expect_success 'clean pack garbage with gc' '
 	test_when_finished "rm -f .git/objects/pack/fake*" &&
 	test_when_finished "rm -f .git/objects/pack/foo*" &&
 	: >.git/objects/pack/foo.keep &&
-- 
2.5.1