In fork-point mode, merge-base adds the commit at refname to a list of
candidates to walk from only when the reflog is empty. Therefore, it
fails to find merge bases that are descendants of the most recent reflog
entry.
Add the commit at the tip unconditionally so that a merge base on the
history of refname is found in any case, independent of the state of the
reflog.
Signed-off-by: Michael J Gruber <g...@grubix.eu>
---
builtin/merge-base.c | 2 +-
t/t6010-merge-base.sh | 8 ++++++++
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/builtin/merge-base.c b/builtin/merge-base.c
index 926a7615ea..b5b4cf7eac 100644
--- a/builtin/merge-base.c
+++ b/builtin/merge-base.c
@@ -174,7 +174,7 @@ static int handle_fork_point(int argc, const char **argv)
revs.initial = 1;
for_each_reflog_ent(refname, collect_one_reflog_ent, &revs);
- if (!revs.nr && !get_oid(refname, &oid))
+ if (!get_oid(refname, &oid))
add_one_commit(&oid, &revs);
for (i = 0; i < revs.nr; i++)
diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
index 850463d4f2..78342896c7 100755
--- a/t/t6010-merge-base.sh
+++ b/t/t6010-merge-base.sh
@@ -275,6 +275,14 @@ test_expect_success '--fork-point works with merge-base
outside reflog' '
test_cmp expect actual
'
+test_expect_success '--fork-point works with merge-base outside partial
reflog' '
+ git -c core.logallrefupdates=true branch partial-reflog base &&
+ git rev-parse no-reflog >.git/refs/heads/partial-reflog &&
+ git rev-parse no-reflog >expect &&
+ git merge-base --fork-point partial-reflog no-reflog >actual &&
+ test_cmp expect actual
+'
+
test_expect_success 'merge-base --octopus --all for complex tree' '
# Best common ancestor for JE, JAA and JDD is JC
# JE
--
2.14.1.712.gda4591c8a2
