revision: separate walk and unsorted flags

The `--no-walk` flag supports two modes: either it sorts the revisions
given as input input or it doesn't. This is reflected in a single
`no_walk` flag, which reflects one of the three states "walk", "don't
walk but without sorting" and "don't walk but with sorting".

Split up the flag into two separate bits, one indicating whether we
should walk or not and one indicating whether the input should be sorted
or not. This will allow us to more easily introduce a new flag
`--unsorted-input`, which only impacts the sorting bit.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/revision.c b/revision.c
index cddd054..86bbcd1 100644
--- a/revision.c
+++ b/revision.c
@@ -2651,16 +2651,17 @@ static int handle_revision_pseudo_opt(const char *submodule,
 	} else if (!strcmp(arg, "--not")) {
 		*flags ^= UNINTERESTING | BOTTOM;
 	} else if (!strcmp(arg, "--no-walk")) {
-		revs->no_walk = REVISION_WALK_NO_WALK_SORTED;
+		revs->no_walk = 1;
 	} else if (skip_prefix(arg, "--no-walk=", &optarg)) {
 		/*
 		 * Detached form ("--no-walk X" as opposed to "--no-walk=X")
 		 * not allowed, since the argument is optional.
 		 */
+		revs->no_walk = 1;
 		if (!strcmp(optarg, "sorted"))
-			revs->no_walk = REVISION_WALK_NO_WALK_SORTED;
+			revs->unsorted_input = 0;
 		else if (!strcmp(optarg, "unsorted"))
-			revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
+			revs->unsorted_input = 1;
 		else
 			return error("invalid argument to --no-walk");
 	} else if (!strcmp(arg, "--do-walk")) {
@@ -3584,7 +3585,7 @@ int prepare_revision_walk(struct rev_info *revs)
 
 	if (!revs->reflog_info)
 		prepare_to_use_bloom_filter(revs);
-	if (revs->no_walk != REVISION_WALK_NO_WALK_UNSORTED)
+	if (!revs->unsorted_input)
 		commit_list_sort_by_date(&revs->commits);
 	if (revs->no_walk)
 		return 0;