builtin-am: implement --rebasing mode

Since 3041c32 (am: --rebasing, 2008-03-04), git-am.sh supported the --rebasing option, which is used internally by git-rebase to tell git-am that it is being used for its purpose. It would create the empty file $state_dir/rebasing to help "completion" scripts tell if the ongoing operation is am or rebase. As of 0fbb95d (am: don't call mailinfo if $rebasing, 2012-06-26), --rebasing also implies --3way as well. Since a1549e1 (am: return control to caller, for housekeeping, 2013-05-12), git-am.sh would only clean up the state directory when it is not --rebasing, instead deferring cleanup to git-rebase.sh. Re-implement the above in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Paul Tan committed Aug 4, 2015 at 21:51 UTC 35bdcc59f6fa29699c106123d48bbd96938aba6d
1 file changed +26 -4
builtin/am.c
+26 -4
@@ -89,6 +89,7 @@ struct am_state {
89 int quiet;
90 int signoff;
91 const char *resolvemsg;
92 + int rebasing;
93 };
94
95 /**
@@ -364,6 +365,8 @@ static void am_load(struct am_state *state)
365 read_state_file(&sb, state, "sign", 1);
366 state->signoff = !strcmp(sb.buf, "t");
367
368 + state->rebasing = !!file_exists(am_path(state, "rebasing"));
369 +
370 strbuf_release(&sb);
371 }
372
@@ -542,18 +545,29 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
545 die(_("Failed to split patches."));
546 }
547
548 + if (state->rebasing)
549 + state->threeway = 1;
550 +
551 write_file(am_path(state, "threeway"), 1, state->threeway ? "t" : "f");
552
553 write_file(am_path(state, "quiet"), 1, state->quiet ? "t" : "f");
554
555 write_file(am_path(state, "sign"), 1, state->signoff ? "t" : "f");
556
557 + if (state->rebasing)
558 + write_file(am_path(state, "rebasing"), 1, "%s", "");
559 + else
560 + write_file(am_path(state, "applying"), 1, "%s", "");
561 +
562 if (!get_sha1("HEAD", curr_head)) {
563 write_file(am_path(state, "abort-safety"), 1, "%s", sha1_to_hex(curr_head));
553 - update_ref("am", "ORIG_HEAD", curr_head, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
564 + if (!state->rebasing)
565 + update_ref("am", "ORIG_HEAD", curr_head, NULL, 0,
566 + UPDATE_REFS_DIE_ON_ERR);
567 } else {
568 write_file(am_path(state, "abort-safety"), 1, "%s", "");
556 - delete_ref("ORIG_HEAD", NULL, 0);
569 + if (!state->rebasing)
570 + delete_ref("ORIG_HEAD", NULL, 0);
571 }
572
573 /*
@@ -1054,8 +1068,14 @@ next:
1068 am_next(state);
1069 }
1070
1057 - am_destroy(state);
1058 - run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
1071 + /*
1072 + * In rebasing mode, it's up to the caller to take care of
1073 + * housekeeping.
1074 + */
1075 + if (!state->rebasing) {
1076 + am_destroy(state);
1077 + run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
1078 + }
1079 }
1080
1081 /**
@@ -1325,6 +1345,8 @@ int cmd_am(int argc, const char **argv, const char *prefix)
1345 OPT_CMDMODE(0, "abort", &resume,
1346 N_("restore the original branch and abort the patching operation."),
1347 RESUME_ABORT),
1348 + OPT_HIDDEN_BOOL(0, "rebasing", &state.rebasing,
1349 + N_("(internal use for git-rebase)")),
1350 OPT_END()
1351 };
1352