builtin-am: invoke applypatch-msg hook

Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07),
git-am.sh will invoke the applypatch-msg hooks just after extracting the
patch message. If the applypatch-msg hook exits with a non-zero status,
git-am.sh abort before even applying the patch to the index.

Re-implement this in builtin/am.c.

Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/am.c b/builtin/am.c
index 7d7f91df2ccdfd7dd627972b3abd8451eeb83683..f0e3aab9af55d2b4e2345cc2e26c8c5faae4bf9c 100644 (file)
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -455,6 +455,27 @@ static void am_destroy(const struct am_state *state)
        strbuf_release(&sb);
 }
 
+/**
+ * Runs applypatch-msg hook. Returns its exit code.
+ */
+static int run_applypatch_msg_hook(struct am_state *state)
+{
+       int ret;
+
+       assert(state->msg);
+       ret = run_hook_le(NULL, "applypatch-msg", am_path(state, "final-commit"), NULL);
+
+       if (!ret) {
+               free(state->msg);
+               state->msg = NULL;
+               if (read_commit_msg(state) < 0)
+                       die(_("'%s' was deleted by the applypatch-msg hook"),
+                               am_path(state, "final-commit"));
+       }
+
+       return ret;
+}
+
 /**
  * Runs post-rewrite hook. Returns it exit code.
  */
@@ -1420,6 +1441,9 @@ static void am_run(struct am_state *state, int resume)
                        write_commit_msg(state);
                }
 
+               if (run_applypatch_msg_hook(state))
+                       exit(1);
+
                say(state, stdout, _("Applying: %.*s"), linelen(state->msg), state->msg);
 
                apply_status = run_apply(state, NULL);