sequencer: write useful reflog message for fast-forward

The following command

$ git cherry-pick --ff b8bb3f

writes the following uninformative message to the reflog

cherry-pick

Improve it to

cherry-pick: fast-forward

Avoid hard-coding "cherry-pick" in fast_forward_to(), so the sequencer
is generic enough to support future actions.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sequencer.c b/sequencer.c
index ab6f8a722d1dfa8f9633d8c046aad26ef4d0404e..423c1f583d82675e8b184e4ac7081432c303dfe1 100644 (file)
--- a/sequencer.c
+++ b/sequencer.c
@@ -270,15 +270,20 @@ static int error_dirty_index(struct replay_opts *opts)
 }
 
 static int fast_forward_to(const unsigned char *to, const unsigned char *from,
-                          int unborn)
+                       int unborn, struct replay_opts *opts)
 {
        struct ref_lock *ref_lock;
+       struct strbuf sb = STRBUF_INIT;
+       int ret;
 
        read_cache();
        if (checkout_fast_forward(from, to, 1))
                exit(1); /* the callee should have complained already */
        ref_lock = lock_any_ref_for_update("HEAD", unborn ? null_sha1 : from, 0);
-       return write_ref_sha1(ref_lock, to, "cherry-pick");
+       strbuf_addf(&sb, "%s: fast-forward", action_name(opts));
+       ret = write_ref_sha1(ref_lock, to, sb.buf);
+       strbuf_release(&sb);
+       return ret;
 }
 
 static int do_recursive_merge(struct commit *base, struct commit *next,
@@ -523,7 +528,7 @@ static int do_pick_commit(struct commit *commit, struct replay_opts *opts)
        if (opts->allow_ff &&
            ((parent && !hashcmp(parent->object.sha1, head)) ||
             (!parent && unborn)))
-            return fast_forward_to(commit->object.sha1, head, unborn);
+               return fast_forward_to(commit->object.sha1, head, unborn, opts);
 
        if (parent && parse_commit(parent) < 0)
                /* TRANSLATORS: The first %s will be "revert" or