This is like get_merge_bases() but it works for multiple heads, like
show-branch --merge-base.
Signed-off-by: Miklos Vajna <vmiklos@xxxxxxxxxxxxxx>
---
commit.c | 32 ++++++++++++++++++++++++++++++++
commit.h | 1 +
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/commit.c b/commit.c
index bbf9c75..13fa39d 100644
--- a/commit.c
+++ b/commit.c
@@ -600,6 +600,38 @@ static struct commit_list *merge_bases(struct commit *one, struct commit *two)
return result;
}
+struct commit_list *get_octopus_merge_bases(struct commit_list *in, int cleanup)
+{
+ struct commit_list *i, *j, *k, *ret = NULL;
+
+ for (i = in; i; i = i->next) {
+ if (!ret)
+ commit_list_append(i->item, &ret);
+ else {
+ struct commit_list *new = NULL, *end = NULL;
+
+ for (j = ret; j; j = j->next) {
+ struct commit_list *bases;
+ bases = get_merge_bases(i->item, j->item, cleanup);
+ /*
+ * Now we just append bases to new, but
+ * calling commit_list_append() for each
+ * item would be expensive, so do it by
+ * hand.
+ */
+ if (!new)
+ new = bases;
+ else
+ end->next = bases;
+ for (k = bases; k; k = k->next)
+ end = k;
+ }
+ ret = new;
+ }
+ }
+ return ret;
+}
+
struct commit_list *get_merge_bases(struct commit *one,
struct commit *two, int cleanup)
{
diff --git a/commit.h b/commit.h
index 7f8c5ee..ca858ed 100644
--- a/commit.h
+++ b/commit.h
@@ -121,6 +121,7 @@ int read_graft_file(const char *graft_file);
struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
+extern struct commit_list *get_octopus_merge_bases(struct commit_list *in, int cleanup);
extern int register_shallow(const unsigned char *sha1);
extern int unregister_shallow(const unsigned char *sha1);
--
1.5.6.rc2.dirty
--
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