rev-list: use bitmap filters for traversal

This just passes the filter-options struct to prepare_bitmap_walk().
Since the bitmap code doesn't actually support any filters yet, it will
fallback to the non-bitmap code if any --filter is specified. But this
lets us exercise that rejection code path, as well as getting us ready
to test filters via rev-list when we _do_ support them.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/rev-list.c

@@ -372,7 +372,8 @@ static inline int parse_missing_action_value(const char *value)
 	return 0;
 }
 
-static int try_bitmap_count(struct rev_info *revs)
+static int try_bitmap_count(struct rev_info *revs,
+			    struct list_objects_filter_options *filter)
 {
 	uint32_t commit_count = 0,
 		 tag_count = 0,
@@ -407,7 +408,7 @@ static int try_bitmap_count(struct rev_info *revs)
 	 */
 	max_count = revs->max_count;
 
-	bitmap_git = prepare_bitmap_walk(revs, NULL);
+	bitmap_git = prepare_bitmap_walk(revs, filter);
 	if (!bitmap_git)
 		return -1;
 
@@ -423,7 +424,8 @@ static int try_bitmap_count(struct rev_info *revs)
 	return 0;
 }
 
-static int try_bitmap_traversal(struct rev_info *revs)
+static int try_bitmap_traversal(struct rev_info *revs,
+				struct list_objects_filter_options *filter)
 {
 	struct bitmap_index *bitmap_git;
 
@@ -434,7 +436,7 @@ static int try_bitmap_traversal(struct rev_info *revs)
 	if (revs->max_count >= 0)
 		return -1;
 
-	bitmap_git = prepare_bitmap_walk(revs, NULL);
+	bitmap_git = prepare_bitmap_walk(revs, filter);
 	if (!bitmap_git)
 		return -1;
 
@@ -605,9 +607,6 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 	    (revs.left_right || revs.cherry_mark))
 		die(_("marked counting is incompatible with --objects"));
 
-	if (filter_options.choice)
-		use_bitmap_index = 0;
-
 	save_commit_buffer = (revs.verbose_header ||
 			      revs.grep_filter.pattern_list ||
 			      revs.grep_filter.header_list);
@@ -618,9 +617,9 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 		progress = start_delayed_progress(show_progress, 0);
 
 	if (use_bitmap_index) {
-		if (!try_bitmap_count(&revs))
+		if (!try_bitmap_count(&revs, &filter_options))
 			return 0;
-		if (!try_bitmap_traversal(&revs))
+		if (!try_bitmap_traversal(&revs, &filter_options))
 			return 0;
 	}