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[PATCH] revision: Don't queue uninteresting commits

From
Øystein Walle <oystwa@gmail.com>
Date
Oct 11, 2023, 12:35 UTC
Message-ID
<20231011123534.119994-1-oystwa@gmail.com>

Currently all given commits are added to the topo_queue during init_topo_walk(). Later on in get_revision_1() the uninteresting ones are skipped because simplify_commit() tells it to.

Let's not add them to the topo_queue in the first place.
Signed-off-by: Øystein Walle <oystwa@gmail.com>
---

I noticed this while trying to understand the generation based algorithm introduced in b45424181e (revision.c: generation-based topo-order algorithm, 2018-11-01) in an attempt to write a similar one for gitoxide. Comparing my solution to git's output I fixed a mismatch by essentially doing this, and it turns out it works in git too. I am not extremely confident, but all the tests pass...

For fun I also tried removing the UNINTERESTING check from get_commit_action() altogether but then a lot of tests fail. I expected that because both the flag and function predate the new algorithm.

 revision.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/revision.c b/revision.c
index 2f4c53ea20..deeab813c7 100644
--- a/revision.c
+++ b/revision.c
@@ -3681,7 +3681,8 @@ static void init_topo_walk(struct rev_info *revs)
 	for (list = revs->commits; list; list = list->next) {
 		struct commit *c = list->item;
 
-		if (*(indegree_slab_at(&info->indegree, c)) == 1)
+		if (*(indegree_slab_at(&info->indegree, c)) == 1 &&
+		    !(c->object.flags & UNINTERESTING))
 			prio_queue_put(&info->topo_queue, c);
 	}
 
-- 
2.34.1
Next: Junio C Hamano
Message 1 of 3 in “revision: Don't queue uninteresting commits”
  1. revision: Don't queue uninteresting commitsØystein Walle, Oct 11, 2023
  2. Junio C HamanoOct 11, 2023
  3. Øystein WalleNov 6, 2023

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