Merge branch 'dl/complete-cherry-pick-revert-skip'
[gitweb.git] / sequencer.c
index ccc01608007a3d29c8e5b9f6efd1ccb5fce367b7..d648aaf416510e656a372abe54d1a28d995de889 100644 (file)
@@ -171,17 +171,22 @@ static int git_sequencer_config(const char *k, const char *v, void *cb)
                if (status)
                        return status;
 
-               if (!strcmp(s, "verbatim"))
+               if (!strcmp(s, "verbatim")) {
                        opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_NONE;
-               else if (!strcmp(s, "whitespace"))
+                       opts->explicit_cleanup = 1;
+               } else if (!strcmp(s, "whitespace")) {
                        opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
-               else if (!strcmp(s, "strip"))
+                       opts->explicit_cleanup = 1;
+               } else if (!strcmp(s, "strip")) {
                        opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_ALL;
-               else if (!strcmp(s, "scissors"))
-                       opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
-               else
+                       opts->explicit_cleanup = 1;
+               } else if (!strcmp(s, "scissors")) {
+                       opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SCISSORS;
+                       opts->explicit_cleanup = 1;
+               } else {
                        warning(_("invalid commit message cleanup mode '%s'"),
                                  s);
+               }
 
                free((char *)s);
                return status;
@@ -274,7 +279,7 @@ static const char *gpg_sign_opt_quoted(struct replay_opts *opts)
 int sequencer_remove_state(struct replay_opts *opts)
 {
        struct strbuf buf = STRBUF_INIT;
-       int i;
+       int i, ret = 0;
 
        if (is_rebase_i(opts) &&
            strbuf_read_file(&buf, rebase_path_refs_to_delete(), 0) > 0) {
@@ -283,8 +288,10 @@ int sequencer_remove_state(struct replay_opts *opts)
                        char *eol = strchr(p, '\n');
                        if (eol)
                                *eol = '\0';
-                       if (delete_ref("(rebase -i) cleanup", p, NULL, 0) < 0)
+                       if (delete_ref("(rebase -i) cleanup", p, NULL, 0) < 0) {
                                warning(_("could not delete '%s'"), p);
+                               ret = -1;
+                       }
                        if (!eol)
                                break;
                        p = eol + 1;
@@ -300,10 +307,11 @@ int sequencer_remove_state(struct replay_opts *opts)
 
        strbuf_reset(&buf);
        strbuf_addstr(&buf, get_dir(opts));
-       remove_dir_recursively(&buf, 0);
+       if (remove_dir_recursively(&buf, 0))
+               ret = error(_("could not remove '%s'"), buf.buf);
        strbuf_release(&buf);
 
-       return 0;
+       return ret;
 }
 
 static const char *action_name(const struct replay_opts *opts)
@@ -510,11 +518,54 @@ static int fast_forward_to(struct repository *r,
        return 0;
 }
 
+enum commit_msg_cleanup_mode get_cleanup_mode(const char *cleanup_arg,
+       int use_editor)
+{
+       if (!cleanup_arg || !strcmp(cleanup_arg, "default"))
+               return use_editor ? COMMIT_MSG_CLEANUP_ALL :
+                                   COMMIT_MSG_CLEANUP_SPACE;
+       else if (!strcmp(cleanup_arg, "verbatim"))
+               return COMMIT_MSG_CLEANUP_NONE;
+       else if (!strcmp(cleanup_arg, "whitespace"))
+               return COMMIT_MSG_CLEANUP_SPACE;
+       else if (!strcmp(cleanup_arg, "strip"))
+               return COMMIT_MSG_CLEANUP_ALL;
+       else if (!strcmp(cleanup_arg, "scissors"))
+               return use_editor ? COMMIT_MSG_CLEANUP_SCISSORS :
+                                   COMMIT_MSG_CLEANUP_SPACE;
+       else
+               die(_("Invalid cleanup mode %s"), cleanup_arg);
+}
+
+/*
+ * NB using int rather than enum cleanup_mode to stop clang's
+ * -Wtautological-constant-out-of-range-compare complaining that the comparison
+ * is always true.
+ */
+static const char *describe_cleanup_mode(int cleanup_mode)
+{
+       static const char *modes[] = { "whitespace",
+                                      "verbatim",
+                                      "scissors",
+                                      "strip" };
+
+       if (cleanup_mode < ARRAY_SIZE(modes))
+               return modes[cleanup_mode];
+
+       BUG("invalid cleanup_mode provided (%d)", cleanup_mode);
+}
+
 void append_conflicts_hint(struct index_state *istate,
-                          struct strbuf *msgbuf)
+       struct strbuf *msgbuf, enum commit_msg_cleanup_mode cleanup_mode)
 {
        int i;
 
+       if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS) {
+               strbuf_addch(msgbuf, '\n');
+               wt_status_append_cut_line(msgbuf);
+               strbuf_addch(msgbuf, comment_line_char);
+       }
+
        strbuf_addch(msgbuf, '\n');
        strbuf_commented_addf(msgbuf, "Conflicts:\n");
        for (i = 0; i < istate->cache_nr;) {
@@ -582,7 +633,8 @@ static int do_recursive_merge(struct repository *r,
                        _(action_name(opts)));
 
        if (!clean)
-               append_conflicts_hint(r->index, msgbuf);
+               append_conflicts_hint(r->index, msgbuf,
+                                     opts->default_msg_cleanup);
 
        return !clean;
 }
@@ -718,7 +770,7 @@ static int parse_key_value_squoted(char *buf, struct string_list *list)
  *     GIT_AUTHOR_DATE='$author_date'
  *
  * where $author_name, $author_email and $author_date are quoted. We are strict
- * with our parsing, as the file was meant to be eval'd in the old
+ * with our parsing, as the file was meant to be eval'd in the now-removed
  * git-am.sh/git-rebase--interactive.sh scripts, and thus if the file differs
  * from what this function expects, it is better to bail out than to do
  * something that the user does not expect.
@@ -901,7 +953,6 @@ static int run_git_commit(struct repository *r,
                          unsigned int flags)
 {
        struct child_process cmd = CHILD_PROCESS_INIT;
-       const char *value;
 
        if ((flags & CREATE_ROOT_COMMIT) && !(flags & AMEND_MSG)) {
                struct strbuf msg = STRBUF_INIT, script = STRBUF_INIT;
@@ -971,7 +1022,7 @@ static int run_git_commit(struct repository *r,
                argv_array_push(&cmd.args, "-e");
        else if (!(flags & CLEANUP_MSG) &&
                 !opts->signoff && !opts->record_origin &&
-                git_config_get_value("commit.cleanup", &value))
+                !opts->explicit_cleanup)
                argv_array_push(&cmd.args, "--cleanup=verbatim");
 
        if ((flags & ALLOW_EMPTY))
@@ -1012,6 +1063,16 @@ static int rest_is_empty(const struct strbuf *sb, int start)
        return 1;
 }
 
+void cleanup_message(struct strbuf *msgbuf,
+       enum commit_msg_cleanup_mode cleanup_mode, int verbose)
+{
+       if (verbose || /* Truncate the message just before the diff, if any. */
+           cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
+               strbuf_setlen(msgbuf, wt_status_locate_end(msgbuf->buf, msgbuf->len));
+       if (cleanup_mode != COMMIT_MSG_CLEANUP_NONE)
+               strbuf_stripspace(msgbuf, cleanup_mode == COMMIT_MSG_CLEANUP_ALL);
+}
+
 /*
  * Find out if the message in the strbuf contains only whitespace and
  * Signed-off-by lines.
@@ -1382,8 +1443,13 @@ static int try_to_commit(struct repository *r,
                msg = &commit_msg;
        }
 
-       cleanup = (flags & CLEANUP_MSG) ? COMMIT_MSG_CLEANUP_ALL :
-                                         opts->default_msg_cleanup;
+       if (flags & CLEANUP_MSG)
+               cleanup = COMMIT_MSG_CLEANUP_ALL;
+       else if ((opts->signoff || opts->record_origin) &&
+                !opts->explicit_cleanup)
+               cleanup = COMMIT_MSG_CLEANUP_SPACE;
+       else
+               cleanup = opts->default_msg_cleanup;
 
        if (cleanup != COMMIT_MSG_CLEANUP_NONE)
                strbuf_stripspace(msg, cleanup == COMMIT_MSG_CLEANUP_ALL);
@@ -2013,6 +2079,18 @@ const char *todo_item_get_arg(struct todo_list *todo_list,
        return todo_list->buf.buf + item->arg_offset;
 }
 
+static int is_command(enum todo_command command, const char **bol)
+{
+       const char *str = todo_command_info[command].str;
+       const char nick = todo_command_info[command].c;
+       const char *p = *bol + 1;
+
+       return skip_prefix(*bol, str, bol) ||
+               ((nick && **bol == nick) &&
+                (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || !*p) &&
+                (*bol = p));
+}
+
 static int parse_insn_line(struct repository *r, struct todo_item *item,
                           const char *buf, const char *bol, char *eol)
 {
@@ -2034,12 +2112,7 @@ static int parse_insn_line(struct repository *r, struct todo_item *item,
        }
 
        for (i = 0; i < TODO_COMMENT; i++)
-               if (skip_prefix(bol, todo_command_info[i].str, &bol)) {
-                       item->command = i;
-                       break;
-               } else if ((bol + 1 == eol || bol[1] == ' ') &&
-                          *bol == todo_command_info[i].c) {
-                       bol++;
+               if (is_command(i, &bol)) {
                        item->command = i;
                        break;
                }
@@ -2098,12 +2171,40 @@ static int parse_insn_line(struct repository *r, struct todo_item *item,
        item->arg_len = (int)(eol - bol);
 
        if (status < 0)
-               return -1;
+               return error(_("could not parse '%.*s'"),
+                            (int)(end_of_object_name - bol), bol);
 
        item->commit = lookup_commit_reference(r, &commit_oid);
        return !item->commit;
 }
 
+int sequencer_get_last_command(struct repository *r, enum replay_action *action)
+{
+       const char *todo_file, *bol;
+       struct strbuf buf = STRBUF_INIT;
+       int ret = 0;
+
+       todo_file = git_path_todo_file();
+       if (strbuf_read_file(&buf, todo_file, 0) < 0) {
+               if (errno == ENOENT || errno == ENOTDIR)
+                       return -1;
+               else
+                       return error_errno("unable to open '%s'", todo_file);
+       }
+       bol = buf.buf + strspn(buf.buf, " \t\r\n");
+       if (is_command(TODO_PICK, &bol) && (*bol == ' ' || *bol == '\t'))
+               *action = REPLAY_PICK;
+       else if (is_command(TODO_REVERT, &bol) &&
+                (*bol == ' ' || *bol == '\t'))
+               *action = REPLAY_REVERT;
+       else
+               ret = -1;
+
+       strbuf_release(&buf);
+
+       return ret;
+}
+
 int todo_list_parse_insn_buffer(struct repository *r, char *buf,
                                struct todo_list *todo_list)
 {
@@ -2187,6 +2288,59 @@ static ssize_t strbuf_read_file_or_whine(struct strbuf *sb, const char *path)
        return len;
 }
 
+static int have_finished_the_last_pick(void)
+{
+       struct strbuf buf = STRBUF_INIT;
+       const char *eol;
+       const char *todo_path = git_path_todo_file();
+       int ret = 0;
+
+       if (strbuf_read_file(&buf, todo_path, 0) < 0) {
+               if (errno == ENOENT) {
+                       return 0;
+               } else {
+                       error_errno("unable to open '%s'", todo_path);
+                       return 0;
+               }
+       }
+       /* If there is only one line then we are done */
+       eol = strchr(buf.buf, '\n');
+       if (!eol || !eol[1])
+               ret = 1;
+
+       strbuf_release(&buf);
+
+       return ret;
+}
+
+void sequencer_post_commit_cleanup(struct repository *r, int verbose)
+{
+       struct replay_opts opts = REPLAY_OPTS_INIT;
+       int need_cleanup = 0;
+
+       if (file_exists(git_path_cherry_pick_head(r))) {
+               if (!unlink(git_path_cherry_pick_head(r)) && verbose)
+                       warning(_("cancelling a cherry picking in progress"));
+               opts.action = REPLAY_PICK;
+               need_cleanup = 1;
+       }
+
+       if (file_exists(git_path_revert_head(r))) {
+               if (!unlink(git_path_revert_head(r)) && verbose)
+                       warning(_("cancelling a revert in progress"));
+               opts.action = REPLAY_REVERT;
+               need_cleanup = 1;
+       }
+
+       if (!need_cleanup)
+               return;
+
+       if (!have_finished_the_last_pick())
+               return;
+
+       sequencer_remove_state(&opts);
+}
+
 static int read_populate_todo(struct repository *r,
                              struct todo_list *todo_list,
                              struct replay_opts *opts)
@@ -2274,6 +2428,15 @@ static int populate_opts_cb(const char *key, const char *value, void *data)
                opts->no_commit = git_config_bool_or_int(key, value, &error_flag);
        else if (!strcmp(key, "options.edit"))
                opts->edit = git_config_bool_or_int(key, value, &error_flag);
+       else if (!strcmp(key, "options.allow-empty"))
+               opts->allow_empty =
+                       git_config_bool_or_int(key, value, &error_flag);
+       else if (!strcmp(key, "options.allow-empty-message"))
+               opts->allow_empty_message =
+                       git_config_bool_or_int(key, value, &error_flag);
+       else if (!strcmp(key, "options.keep-redundant-commits"))
+               opts->keep_redundant_commits =
+                       git_config_bool_or_int(key, value, &error_flag);
        else if (!strcmp(key, "options.signoff"))
                opts->signoff = git_config_bool_or_int(key, value, &error_flag);
        else if (!strcmp(key, "options.record-origin"))
@@ -2293,7 +2456,10 @@ static int populate_opts_cb(const char *key, const char *value, void *data)
                opts->allow_rerere_auto =
                        git_config_bool_or_int(key, value, &error_flag) ?
                                RERERE_AUTOUPDATE : RERERE_NOAUTOUPDATE;
-       else
+       else if (!strcmp(key, "options.default-msg-cleanup")) {
+               opts->explicit_cleanup = 1;
+               opts->default_msg_cleanup = get_cleanup_mode(value, 1);
+       } else
                return error(_("invalid key: %s"), key);
 
        if (!error_flag)
@@ -2418,14 +2584,15 @@ static void write_strategy_opts(struct replay_opts *opts)
 }
 
 int write_basic_state(struct replay_opts *opts, const char *head_name,
-                     const char *onto, const char *orig_head)
+                     struct commit *onto, const char *orig_head)
 {
        const char *quiet = getenv("GIT_QUIET");
 
        if (head_name)
                write_file(rebase_path_head_name(), "%s\n", head_name);
        if (onto)
-               write_file(rebase_path_onto(), "%s\n", onto);
+               write_file(rebase_path_onto(), "%s\n",
+                          oid_to_hex(&onto->object.oid));
        if (orig_head)
                write_file(rebase_path_orig_head(), "%s\n", orig_head);
 
@@ -2487,15 +2654,41 @@ static int walk_revs_populate_todo(struct todo_list *todo_list,
        return 0;
 }
 
-static int create_seq_dir(void)
+static int create_seq_dir(struct repository *r)
 {
-       if (file_exists(git_path_seq_dir())) {
-               error(_("a cherry-pick or revert is already in progress"));
-               advise(_("try \"git cherry-pick (--continue | --quit | --abort)\""));
+       enum replay_action action;
+       const char *in_progress_error = NULL;
+       const char *in_progress_advice = NULL;
+       unsigned int advise_skip = file_exists(git_path_revert_head(r)) ||
+                               file_exists(git_path_cherry_pick_head(r));
+
+       if (!sequencer_get_last_command(r, &action)) {
+               switch (action) {
+               case REPLAY_REVERT:
+                       in_progress_error = _("revert is already in progress");
+                       in_progress_advice =
+                       _("try \"git revert (--continue | %s--abort | --quit)\"");
+                       break;
+               case REPLAY_PICK:
+                       in_progress_error = _("cherry-pick is already in progress");
+                       in_progress_advice =
+                       _("try \"git cherry-pick (--continue | %s--abort | --quit)\"");
+                       break;
+               default:
+                       BUG("unexpected action in create_seq_dir");
+               }
+       }
+       if (in_progress_error) {
+               error("%s", in_progress_error);
+               if (advice_sequencer_in_use)
+                       advise(in_progress_advice,
+                               advise_skip ? "--skip | " : "");
                return -1;
-       } else if (mkdir(git_path_seq_dir(), 0777) < 0)
+       }
+       if (mkdir(git_path_seq_dir(), 0777) < 0)
                return error_errno(_("could not create sequencer directory '%s'"),
                                   git_path_seq_dir());
+
        return 0;
 }
 
@@ -2546,15 +2739,20 @@ static int rollback_is_safe(void)
        return oideq(&actual_head, &expected_head);
 }
 
-static int reset_for_rollback(const struct object_id *oid)
+static int reset_merge(const struct object_id *oid)
 {
-       const char *argv[4];    /* reset --merge <arg> + NULL */
+       int ret;
+       struct argv_array argv = ARGV_ARRAY_INIT;
 
-       argv[0] = "reset";
-       argv[1] = "--merge";
-       argv[2] = oid_to_hex(oid);
-       argv[3] = NULL;
-       return run_command_v_opt(argv, RUN_GIT_CMD);
+       argv_array_pushl(&argv, "reset", "--merge", NULL);
+
+       if (!is_null_oid(oid))
+               argv_array_push(&argv, oid_to_hex(oid));
+
+       ret = run_command_v_opt(argv.argv, RUN_GIT_CMD);
+       argv_array_clear(&argv);
+
+       return ret;
 }
 
 static int rollback_single_pick(struct repository *r)
@@ -2568,7 +2766,16 @@ static int rollback_single_pick(struct repository *r)
                return error(_("cannot resolve HEAD"));
        if (is_null_oid(&head_oid))
                return error(_("cannot abort from a branch yet to be born"));
-       return reset_for_rollback(&head_oid);
+       return reset_merge(&head_oid);
+}
+
+static int skip_single_pick(void)
+{
+       struct object_id head;
+
+       if (read_ref_full("HEAD", 0, &head, NULL))
+               return error(_("cannot resolve HEAD"));
+       return reset_merge(&head);
 }
 
 int sequencer_rollback(struct repository *r, struct replay_opts *opts)
@@ -2611,7 +2818,7 @@ int sequencer_rollback(struct repository *r, struct replay_opts *opts)
                warning(_("You seem to have moved HEAD. "
                          "Not rewinding, check your HEAD!"));
        } else
-       if (reset_for_rollback(&oid))
+       if (reset_merge(&oid))
                goto fail;
        strbuf_release(&buf);
        return sequencer_remove_state(opts);
@@ -2620,6 +2827,70 @@ int sequencer_rollback(struct repository *r, struct replay_opts *opts)
        return -1;
 }
 
+int sequencer_skip(struct repository *r, struct replay_opts *opts)
+{
+       enum replay_action action = -1;
+       sequencer_get_last_command(r, &action);
+
+       /*
+        * Check whether the subcommand requested to skip the commit is actually
+        * in progress and that it's safe to skip the commit.
+        *
+        * opts->action tells us which subcommand requested to skip the commit.
+        * If the corresponding .git/<ACTION>_HEAD exists, we know that the
+        * action is in progress and we can skip the commit.
+        *
+        * Otherwise we check that the last instruction was related to the
+        * particular subcommand we're trying to execute and barf if that's not
+        * the case.
+        *
+        * Finally we check that the rollback is "safe", i.e., has the HEAD
+        * moved? In this case, it doesn't make sense to "reset the merge" and
+        * "skip the commit" as the user already handled this by committing. But
+        * we'd not want to barf here, instead give advice on how to proceed. We
+        * only need to check that when .git/<ACTION>_HEAD doesn't exist because
+        * it gets removed when the user commits, so if it still exists we're
+        * sure the user can't have committed before.
+        */
+       switch (opts->action) {
+       case REPLAY_REVERT:
+               if (!file_exists(git_path_revert_head(r))) {
+                       if (action != REPLAY_REVERT)
+                               return error(_("no revert in progress"));
+                       if (!rollback_is_safe())
+                               goto give_advice;
+               }
+               break;
+       case REPLAY_PICK:
+               if (!file_exists(git_path_cherry_pick_head(r))) {
+                       if (action != REPLAY_PICK)
+                               return error(_("no cherry-pick in progress"));
+                       if (!rollback_is_safe())
+                               goto give_advice;
+               }
+               break;
+       default:
+               BUG("unexpected action in sequencer_skip");
+       }
+
+       if (skip_single_pick())
+               return error(_("failed to skip the commit"));
+       if (!is_directory(git_path_seq_dir()))
+               return 0;
+
+       return sequencer_continue(r, opts);
+
+give_advice:
+       error(_("there is nothing to skip"));
+
+       if (advice_resolve_conflict) {
+               advise(_("have you committed already?\n"
+                        "try \"git %s --continue\""),
+                        action == REPLAY_REVERT ? "revert" : "cherry-pick");
+       }
+       return -1;
+}
+
 static int save_todo(struct todo_list *todo_list, struct replay_opts *opts)
 {
        struct lock_file todo_lock = LOCK_INIT;
@@ -2667,36 +2938,59 @@ static int save_opts(struct replay_opts *opts)
        int res = 0;
 
        if (opts->no_commit)
-               res |= git_config_set_in_file_gently(opts_file, "options.no-commit", "true");
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.no-commit", "true");
        if (opts->edit)
-               res |= git_config_set_in_file_gently(opts_file, "options.edit", "true");
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.edit", "true");
+       if (opts->allow_empty)
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.allow-empty", "true");
+       if (opts->allow_empty_message)
+               res |= git_config_set_in_file_gently(opts_file,
+                               "options.allow-empty-message", "true");
+       if (opts->keep_redundant_commits)
+               res |= git_config_set_in_file_gently(opts_file,
+                               "options.keep-redundant-commits", "true");
        if (opts->signoff)
-               res |= git_config_set_in_file_gently(opts_file, "options.signoff", "true");
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.signoff", "true");
        if (opts->record_origin)
-               res |= git_config_set_in_file_gently(opts_file, "options.record-origin", "true");
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.record-origin", "true");
        if (opts->allow_ff)
-               res |= git_config_set_in_file_gently(opts_file, "options.allow-ff", "true");
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.allow-ff", "true");
        if (opts->mainline) {
                struct strbuf buf = STRBUF_INIT;
                strbuf_addf(&buf, "%d", opts->mainline);
-               res |= git_config_set_in_file_gently(opts_file, "options.mainline", buf.buf);
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.mainline", buf.buf);
                strbuf_release(&buf);
        }
        if (opts->strategy)
-               res |= git_config_set_in_file_gently(opts_file, "options.strategy", opts->strategy);
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.strategy", opts->strategy);
        if (opts->gpg_sign)
-               res |= git_config_set_in_file_gently(opts_file, "options.gpg-sign", opts->gpg_sign);
+               res |= git_config_set_in_file_gently(opts_file,
+                                       "options.gpg-sign", opts->gpg_sign);
        if (opts->xopts) {
                int i;
                for (i = 0; i < opts->xopts_nr; i++)
                        res |= git_config_set_multivar_in_file_gently(opts_file,
-                                                       "options.strategy-option",
-                                                       opts->xopts[i], "^$", 0);
+                                       "options.strategy-option",
+                                       opts->xopts[i], "^$", 0);
        }
        if (opts->allow_rerere_auto)
-               res |= git_config_set_in_file_gently(opts_file, "options.allow-rerere-auto",
-                                                    opts->allow_rerere_auto == RERERE_AUTOUPDATE ?
-                                                    "true" : "false");
+               res |= git_config_set_in_file_gently(opts_file,
+                               "options.allow-rerere-auto",
+                               opts->allow_rerere_auto == RERERE_AUTOUPDATE ?
+                               "true" : "false");
+
+       if (opts->explicit_cleanup)
+               res |= git_config_set_in_file_gently(opts_file,
+                               "options.default-msg-cleanup",
+                               describe_cleanup_mode(opts->default_msg_cleanup));
        return res;
 }
 
@@ -3008,7 +3302,7 @@ static int do_reset(struct repository *r,
                return error_resolve_conflict(_(action_name(opts)));
        }
 
-       if (!fill_tree_descriptor(&desc, &oid)) {
+       if (!fill_tree_descriptor(r, &desc, &oid)) {
                error(_("failed to find tree of %s"), oid_to_hex(&oid));
                rollback_lock_file(&lock);
                free((void *)desc.buffer);
@@ -3070,6 +3364,9 @@ static int do_merge(struct repository *r,
        struct commit *head_commit, *merge_commit, *i;
        struct commit_list *bases, *j, *reversed = NULL;
        struct commit_list *to_merge = NULL, **tail = &to_merge;
+       const char *strategy = !opts->xopts_nr &&
+               (!opts->strategy || !strcmp(opts->strategy, "recursive")) ?
+               NULL : opts->strategy;
        struct merge_options o;
        int merge_arg_len, oneline_offset, can_fast_forward, ret, k;
        static struct lock_file lock;
@@ -3215,10 +3512,14 @@ static int do_merge(struct repository *r,
                rollback_lock_file(&lock);
                ret = fast_forward_to(r, &commit->object.oid,
                                      &head_commit->object.oid, 0, opts);
+               if (flags & TODO_EDIT_MERGE_MSG) {
+                       run_commit_flags |= AMEND_MSG;
+                       goto fast_forward_edit;
+               }
                goto leave_merge;
        }
 
-       if (to_merge->next) {
+       if (strategy || to_merge->next) {
                /* Octopus merge */
                struct child_process cmd = CHILD_PROCESS_INIT;
 
@@ -3232,7 +3533,14 @@ static int do_merge(struct repository *r,
                cmd.git_cmd = 1;
                argv_array_push(&cmd.args, "merge");
                argv_array_push(&cmd.args, "-s");
-               argv_array_push(&cmd.args, "octopus");
+               if (!strategy)
+                       argv_array_push(&cmd.args, "octopus");
+               else {
+                       argv_array_push(&cmd.args, strategy);
+                       for (k = 0; k < opts->xopts_nr; k++)
+                               argv_array_pushf(&cmd.args,
+                                                "-X%s", opts->xopts[k]);
+               }
                argv_array_push(&cmd.args, "--no-edit");
                argv_array_push(&cmd.args, "--no-ff");
                argv_array_push(&cmd.args, "--no-log");
@@ -3318,6 +3626,7 @@ static int do_merge(struct repository *r,
                 * value (a negative one would indicate that the `merge`
                 * command needs to be rescheduled).
                 */
+       fast_forward_edit:
                ret = !!run_git_commit(r, git_path_merge_msg(r), opts,
                                       run_commit_flags);
 
@@ -3456,7 +3765,7 @@ int prepare_branch_to_be_rebased(struct repository *r, struct replay_opts *opts,
 }
 
 static int checkout_onto(struct repository *r, struct replay_opts *opts,
-                        const char *onto_name, const char *onto,
+                        const char *onto_name, const struct object_id *onto,
                         const char *orig_head)
 {
        struct object_id oid;
@@ -3465,7 +3774,7 @@ static int checkout_onto(struct repository *r, struct replay_opts *opts,
        if (get_oid(orig_head, &oid))
                return error(_("%s: not a valid OID"), orig_head);
 
-       if (run_git_checkout(r, opts, onto, action)) {
+       if (run_git_checkout(r, opts, oid_to_hex(onto), action)) {
                apply_autostash(opts);
                sequencer_remove_state(opts);
                return error(_("could not detach HEAD"));
@@ -3542,11 +3851,14 @@ static int pick_commits(struct repository *r,
                        unlink(rebase_path_author_script());
                        unlink(rebase_path_stopped_sha());
                        unlink(rebase_path_amend());
-                       unlink(git_path_merge_head(the_repository));
+                       unlink(git_path_merge_head(r));
                        delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
 
-                       if (item->command == TODO_BREAK)
+                       if (item->command == TODO_BREAK) {
+                               if (!opts->verbose)
+                                       term_clear_line();
                                return stopped_at_head(r);
+                       }
                }
                if (item->command <= TODO_SQUASH) {
                        if (is_rebase_i(opts))
@@ -3568,11 +3880,14 @@ static int pick_commits(struct repository *r,
                        }
                        if (item->command == TODO_EDIT) {
                                struct commit *commit = item->commit;
-                               if (!res)
+                               if (!res) {
+                                       if (!opts->verbose)
+                                               term_clear_line();
                                        fprintf(stderr,
                                                _("Stopped at %s...  %.*s\n"),
                                                short_commit_name(commit),
                                                item->arg_len, arg);
+                               }
                                return error_with_patch(r, commit,
                                        arg, item->arg_len, opts, res, !res);
                        }
@@ -3610,11 +3925,12 @@ static int pick_commits(struct repository *r,
                        int saved = *end_of_arg;
                        struct stat st;
 
+                       if (!opts->verbose)
+                               term_clear_line();
                        *end_of_arg = '\0';
                        res = do_exec(r, arg);
                        *end_of_arg = saved;
 
-                       /* Reread the todo file if it has changed. */
                        if (res) {
                                if (opts->reschedule_failed_exec)
                                        reschedule = 1;
@@ -3622,6 +3938,7 @@ static int pick_commits(struct repository *r,
                                res = error_errno(_("could not stat '%s'"),
                                                  get_todo_path(opts));
                        else if (match_stat_data(&todo_list->stat, &st)) {
+                               /* Reread the todo file if it has changed. */
                                todo_list_release(todo_list);
                                if (read_populate_todo(r, todo_list, opts))
                                        res = -1; /* message was printed */
@@ -3768,10 +4085,13 @@ static int pick_commits(struct repository *r,
                }
                apply_autostash(opts);
 
-               if (!opts->quiet)
+               if (!opts->quiet) {
+                       if (!opts->verbose)
+                               term_clear_line();
                        fprintf(stderr,
                                "Successfully rebased and updated %s.\n",
                                head_ref.buf);
+               }
 
                strbuf_release(&buf);
                strbuf_release(&head_ref);
@@ -3916,7 +4236,7 @@ static int commit_staged_changes(struct repository *r,
                           opts, flags))
                return error(_("could not commit staged changes."));
        unlink(rebase_path_amend());
-       unlink(git_path_merge_head(the_repository));
+       unlink(git_path_merge_head(r));
        if (final_fixup) {
                unlink(rebase_path_fixup_msg());
                unlink(rebase_path_squash_msg());
@@ -4051,7 +4371,7 @@ int sequencer_pick_revisions(struct repository *r,
         */
 
        if (walk_revs_populate_todo(&todo_list, opts) ||
-                       create_seq_dir() < 0)
+                       create_seq_dir(r) < 0)
                return -1;
        if (get_oid("HEAD", &oid) && (opts->action == REPLAY_REVERT))
                return error(_("can't revert as initial commit"));
@@ -4244,6 +4564,7 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 {
        int keep_empty = flags & TODO_LIST_KEEP_EMPTY;
        int rebase_cousins = flags & TODO_LIST_REBASE_COUSINS;
+       int root_with_onto = flags & TODO_LIST_ROOT_WITH_ONTO;
        struct strbuf buf = STRBUF_INIT, oneline = STRBUF_INIT;
        struct strbuf label = STRBUF_INIT;
        struct commit_list *commits = NULL, **tail = &commits, *iter;
@@ -4410,7 +4731,8 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 
                if (!commit)
                        strbuf_addf(out, "%s %s\n", cmd_reset,
-                                   rebase_cousins ? "onto" : "[new root]");
+                                   rebase_cousins || root_with_onto ?
+                                   "onto" : "[new root]");
                else {
                        const char *to = NULL;
 
@@ -4741,16 +5063,16 @@ static int skip_unnecessary_picks(struct repository *r,
 
 int complete_action(struct repository *r, struct replay_opts *opts, unsigned flags,
                    const char *shortrevisions, const char *onto_name,
-                   const char *onto, const char *orig_head, struct string_list *commands,
-                   unsigned autosquash, struct todo_list *todo_list)
+                   struct commit *onto, const char *orig_head,
+                   struct string_list *commands, unsigned autosquash,
+                   struct todo_list *todo_list)
 {
        const char *shortonto, *todo_file = rebase_path_todo();
        struct todo_list new_todo = TODO_LIST_INIT;
        struct strbuf *buf = &todo_list->buf;
-       struct object_id oid;
+       struct object_id oid = onto->object.oid;
        int res;
 
-       get_oid(onto, &oid);
        shortonto = find_unique_abbrev(&oid, DEFAULT_ABBREV);
 
        if (buf->len == 0) {
@@ -4793,7 +5115,7 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla
        if (todo_list_parse_insn_buffer(r, new_todo.buf.buf, &new_todo) ||
            todo_list_check(todo_list, &new_todo)) {
                fprintf(stderr, _(edit_todo_list_advice));
-               checkout_onto(r, opts, onto_name, onto, orig_head);
+               checkout_onto(r, opts, onto_name, &onto->object.oid, orig_head);
                todo_list_release(&new_todo);
 
                return -1;
@@ -4812,7 +5134,7 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla
 
        todo_list_release(&new_todo);
 
-       if (checkout_onto(r, opts, onto_name, oid_to_hex(&oid), orig_head))
+       if (checkout_onto(r, opts, onto_name, &oid, orig_head))
                return -1;
 
        if (require_clean_work_tree(r, "rebase", "", 1, 1))