diff options
| -rw-r--r-- | sequencer.c | 49 | ||||
| -rwxr-xr-x | t/t3510-cherry-pick-sequence.sh | 2 |
2 files changed, 50 insertions, 1 deletions
diff --git a/sequencer.c b/sequencer.c index 30b10ba143..0b78f3149f 100644 --- a/sequencer.c +++ b/sequencer.c @@ -27,6 +27,7 @@ GIT_PATH_FUNC(git_path_seq_dir, "sequencer") static GIT_PATH_FUNC(git_path_todo_file, "sequencer/todo") static GIT_PATH_FUNC(git_path_opts_file, "sequencer/opts") static GIT_PATH_FUNC(git_path_head_file, "sequencer/head") +static GIT_PATH_FUNC(git_path_abort_safety_file, "sequencer/abort-safety") /* * A script to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and @@ -310,6 +311,20 @@ static int error_dirty_index(struct replay_opts *opts) return -1; } +static void update_abort_safety_file(void) +{ + struct object_id head; + + /* Do nothing on a single-pick */ + if (!file_exists(git_path_seq_dir())) + return; + + if (!get_oid("HEAD", &head)) + write_file(git_path_abort_safety_file(), "%s", oid_to_hex(&head)); + else + write_file(git_path_abort_safety_file(), "%s", ""); +} + static int fast_forward_to(const unsigned char *to, const unsigned char *from, int unborn, struct replay_opts *opts) { @@ -339,6 +354,7 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from, strbuf_release(&sb); strbuf_release(&err); ref_transaction_free(transaction); + update_abort_safety_file(); return 0; } @@ -813,6 +829,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit, leave: free_message(commit, &msg); + update_abort_safety_file(); return res; } @@ -1132,9 +1149,34 @@ static int save_head(const char *head) return 0; } +static int rollback_is_safe(void) +{ + struct strbuf sb = STRBUF_INIT; + struct object_id expected_head, actual_head; + + if (strbuf_read_file(&sb, git_path_abort_safety_file(), 0) >= 0) { + strbuf_trim(&sb); + if (get_oid_hex(sb.buf, &expected_head)) { + strbuf_release(&sb); + die(_("could not parse %s"), git_path_abort_safety_file()); + } + strbuf_release(&sb); + } + else if (errno == ENOENT) + oidclr(&expected_head); + else + die_errno(_("could not read '%s'"), git_path_abort_safety_file()); + + if (get_oid("HEAD", &actual_head)) + oidclr(&actual_head); + + return !oidcmp(&actual_head, &expected_head); +} + static int reset_for_rollback(const unsigned char *sha1) { const char *argv[4]; /* reset --merge <arg> + NULL */ + argv[0] = "reset"; argv[1] = "--merge"; argv[2] = sha1_to_hex(sha1); @@ -1189,6 +1231,12 @@ int sequencer_rollback(struct replay_opts *opts) error(_("cannot abort from a branch yet to be born")); goto fail; } + + if (!rollback_is_safe()) { + /* Do not error, just do not rollback */ + warning(_("You seem to have moved HEAD. " + "Not rewinding, check your HEAD!")); + } else if (reset_for_rollback(sha1)) goto fail; strbuf_release(&buf); @@ -1393,6 +1441,7 @@ int sequencer_pick_revisions(struct replay_opts *opts) return -1; if (save_opts(opts)) return -1; + update_abort_safety_file(); res = pick_commits(&todo_list, opts); todo_list_release(&todo_list); return res; diff --git a/t/t3510-cherry-pick-sequence.sh b/t/t3510-cherry-pick-sequence.sh index efcd4fc485..372307c21b 100755 --- a/t/t3510-cherry-pick-sequence.sh +++ b/t/t3510-cherry-pick-sequence.sh @@ -147,7 +147,7 @@ test_expect_success '--abort to cancel single cherry-pick' ' git diff-index --exit-code HEAD ' -test_expect_failure '--abort does not unsafely change HEAD' ' +test_expect_success '--abort does not unsafely change HEAD' ' pristine_detach initial && test_must_fail git cherry-pick picked anotherpick && git reset --hard base && |