[PATCH 1/1] Warn about fast-forwarding of submodules during merge

[Leif Middelschulte]

From: Leif Middelschulte <leif.middelschu...@gmail.com>

Warn the user about an automatically fast-forwarded submodule. The silent merge
behavior was introduced by commit 68d03e4a6e44 ("Implement automatic 
fast-forward
merge for submodules", 2010-07-07)).

Signed-off-by: Leif Middelschulte <leif.middelschu...@gmail.com>
---
 submodule.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/submodule.c b/submodule.c
index 74d35b257..0198a72e6 100644
--- a/submodule.c
+++ b/submodule.c
@@ -1817,10 +1817,12 @@ int merge_submodule(struct object_id *result, const 
char *path,
        /* Case #1: a is contained in b or vice versa */
        if (in_merge_bases(commit_a, commit_b)) {
                oidcpy(result, b);
+               warning("Fast-forwarding submodule %s", path);
                return 1;
        }
        if (in_merge_bases(commit_b, commit_a)) {
                oidcpy(result, a);
+               warning("Fast-forwarding submodule %s", path);
                return 1;
        }
 
-- 
2.15.1 (Apple Git-101)