provide more errors for the "merge into empty head" case
A squash merge into an unborn branch could be implemented by building the
index from the merged-from branch, and doing a single commit, but this is
not supported yet.
A non-fast-forward merge into an unborn branch does not make any sense,
because you cannot make a merge commit if you don't have a commit to use
as the parent.
Signed-off-by: Paolo Bonzini <bonzini@gnu.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-merge.c b/builtin-merge.c
index a201c66..7759a0b 100644
--- a/builtin-merge.c
+++ b/builtin-merge.c
@@ -833,6 +833,11 @@
if (argc != 1)
die("Can merge only exactly one commit into "
"empty head");
+ if (squash)
+ die("Squash commit into empty head not supported yet");
+ if (!allow_fast_forward)
+ die("Non-fast-forward commit does not make sense into "
+ "an empty head");
remote_head = peel_to_type(argv[0], 0, NULL, OBJ_COMMIT);
if (!remote_head)
die("%s - not something we can merge", argv[0]);
