Re: [PATCH 09/11] Introduce filter_independent() in commit.c

This is similar to git-show-branch --independent: It filters out commits
which are reachable from any other item from the input list.

Signed-off-by: Miklos Vajna <redacted>
---
 commit.c |   16 ++++++++++++++++
 commit.h |    1 +
 2 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/commit.c b/commit.c
index 6052ca3..0dbf4b7 100644
--- a/commit.c
+++ b/commit.c

@@ -705,3 +705,19 @@ int in_merge_bases(struct commit *commit, struct commit **reference, int num)
 	free_commit_list(bases);
 	return ret;
 }
+
+struct commit_list *filter_independent(unsigned char *head,
+	struct commit_list *heads)
+{
+	struct commit_list *i, *bases, *ret = NULL;
+	struct commit_list **pptr = &ret;
+
+	commit_list_insert(lookup_commit(head), &heads);
+
+	bases = get_octopus_merge_bases(heads);
+
+	for (i = heads; i; i = i->next)
+		if (!(i->item->object.flags & RESULT))
+			pptr = &commit_list_insert(i->item, pptr)->next;