builtin rebase: optionally auto-detect the upstream
[gitweb.git] / builtin / rebase.c
index 12d34848bd979cc1fe082fa2a9426d9676d83f04..7e2f68eb2822543964193af9a83f13bf9ad5ecd2 100644 (file)
@@ -63,12 +63,6 @@ static int use_builtin_rebase(void)
        return ret;
 }
 
-static int apply_autostash(void)
-{
-       warning("TODO");
-       return 0;
-}
-
 struct rebase_options {
        enum rebase_type type;
        const char *state_dir;
@@ -82,6 +76,7 @@ struct rebase_options {
        const char *revisions;
        const char *switch_to;
        int root;
+       struct object_id *squash_onto;
        struct commit *restrict_revision;
        int dont_finish_rebase;
        enum {
@@ -93,6 +88,16 @@ struct rebase_options {
        } flags;
        struct strbuf git_am_opt;
        const char *action;
+       int signoff;
+       int allow_rerere_autoupdate;
+       int keep_empty;
+       int autosquash;
+       char *gpg_sign_opt;
+       int autostash;
+       char *cmd;
+       int allow_empty_message;
+       int rebase_merges, rebase_cousins;
+       char *strategy, *strategy_opts;
 };
 
 static int is_interactive(struct rebase_options *opts)
@@ -101,6 +106,23 @@ static int is_interactive(struct rebase_options *opts)
                opts->type == REBASE_PRESERVE_MERGES;
 }
 
+static void imply_interactive(struct rebase_options *opts, const char *option)
+{
+       switch (opts->type) {
+       case REBASE_AM:
+               die(_("%s requires an interactive rebase"), option);
+               break;
+       case REBASE_INTERACTIVE:
+       case REBASE_PRESERVE_MERGES:
+               break;
+       case REBASE_MERGE:
+               /* we silently *upgrade* --merge to --interactive if needed */
+       default:
+               opts->type = REBASE_INTERACTIVE; /* implied */
+               break;
+       }
+}
+
 /* Returns the filename prefixed by the state_dir */
 static const char *state_dir_path(const char *filename, struct rebase_options *opts)
 {
@@ -168,18 +190,106 @@ static int read_basic_state(struct rebase_options *opts)
        if (file_exists(state_dir_path("verbose", opts)))
                opts->flags |= REBASE_VERBOSE;
 
+       if (file_exists(state_dir_path("signoff", opts))) {
+               opts->signoff = 1;
+               opts->flags |= REBASE_FORCE;
+       }
+
+       if (file_exists(state_dir_path("allow_rerere_autoupdate", opts))) {
+               strbuf_reset(&buf);
+               if (read_one(state_dir_path("allow_rerere_autoupdate", opts),
+                           &buf))
+                       return -1;
+               if (!strcmp(buf.buf, "--rerere-autoupdate"))
+                       opts->allow_rerere_autoupdate = 1;
+               else if (!strcmp(buf.buf, "--no-rerere-autoupdate"))
+                       opts->allow_rerere_autoupdate = 0;
+               else
+                       warning(_("ignoring invalid allow_rerere_autoupdate: "
+                                 "'%s'"), buf.buf);
+       } else
+               opts->allow_rerere_autoupdate = -1;
+
+       if (file_exists(state_dir_path("gpg_sign_opt", opts))) {
+               strbuf_reset(&buf);
+               if (read_one(state_dir_path("gpg_sign_opt", opts),
+                           &buf))
+                       return -1;
+               free(opts->gpg_sign_opt);
+               opts->gpg_sign_opt = xstrdup(buf.buf);
+       }
+
+       if (file_exists(state_dir_path("strategy", opts))) {
+               strbuf_reset(&buf);
+               if (read_one(state_dir_path("strategy", opts), &buf))
+                       return -1;
+               free(opts->strategy);
+               opts->strategy = xstrdup(buf.buf);
+       }
+
+       if (file_exists(state_dir_path("strategy_opts", opts))) {
+               strbuf_reset(&buf);
+               if (read_one(state_dir_path("strategy_opts", opts), &buf))
+                       return -1;
+               free(opts->strategy_opts);
+               opts->strategy_opts = xstrdup(buf.buf);
+       }
+
        strbuf_release(&buf);
 
        return 0;
 }
 
+static int apply_autostash(struct rebase_options *opts)
+{
+       const char *path = state_dir_path("autostash", opts);
+       struct strbuf autostash = STRBUF_INIT;
+       struct child_process stash_apply = CHILD_PROCESS_INIT;
+
+       if (!file_exists(path))
+               return 0;
+
+       if (read_one(state_dir_path("autostash", opts), &autostash))
+               return error(_("Could not read '%s'"), path);
+       argv_array_pushl(&stash_apply.args,
+                        "stash", "apply", autostash.buf, NULL);
+       stash_apply.git_cmd = 1;
+       stash_apply.no_stderr = stash_apply.no_stdout =
+               stash_apply.no_stdin = 1;
+       if (!run_command(&stash_apply))
+               printf(_("Applied autostash.\n"));
+       else {
+               struct argv_array args = ARGV_ARRAY_INIT;
+               int res = 0;
+
+               argv_array_pushl(&args,
+                                "stash", "store", "-m", "autostash", "-q",
+                                autostash.buf, NULL);
+               if (run_command_v_opt(args.argv, RUN_GIT_CMD))
+                       res = error(_("Cannot store %s"), autostash.buf);
+               argv_array_clear(&args);
+               strbuf_release(&autostash);
+               if (res)
+                       return res;
+
+               fprintf(stderr,
+                       _("Applying autostash resulted in conflicts.\n"
+                         "Your changes are safe in the stash.\n"
+                         "You can run \"git stash pop\" or \"git stash drop\" "
+                         "at any time.\n"));
+       }
+
+       strbuf_release(&autostash);
+       return 0;
+}
+
 static int finish_rebase(struct rebase_options *opts)
 {
        struct strbuf dir = STRBUF_INIT;
        const char *argv_gc_auto[] = { "gc", "--auto", NULL };
 
        delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
-       apply_autostash();
+       apply_autostash(opts);
        close_all_packs(the_repository->objects);
        /*
         * We ignore errors in 'gc --auto', since the
@@ -249,6 +359,26 @@ static int run_specific_rebase(struct rebase_options *opts)
        if (opts->switch_to)
                add_var(&script_snippet, "switch_to", opts->switch_to);
        add_var(&script_snippet, "action", opts->action ? opts->action : "");
+       add_var(&script_snippet, "signoff", opts->signoff ? "--signoff" : "");
+       add_var(&script_snippet, "allow_rerere_autoupdate",
+               opts->allow_rerere_autoupdate < 0 ? "" :
+               opts->allow_rerere_autoupdate ?
+               "--rerere-autoupdate" : "--no-rerere-autoupdate");
+       add_var(&script_snippet, "keep_empty", opts->keep_empty ? "yes" : "");
+       add_var(&script_snippet, "autosquash", opts->autosquash ? "t" : "");
+       add_var(&script_snippet, "gpg_sign_opt", opts->gpg_sign_opt);
+       add_var(&script_snippet, "cmd", opts->cmd);
+       add_var(&script_snippet, "allow_empty_message",
+               opts->allow_empty_message ?  "--allow-empty-message" : "");
+       add_var(&script_snippet, "rebase_merges",
+               opts->rebase_merges ? "t" : "");
+       add_var(&script_snippet, "rebase_cousins",
+               opts->rebase_cousins ? "t" : "");
+       add_var(&script_snippet, "strategy", opts->strategy);
+       add_var(&script_snippet, "strategy_opts", opts->strategy_opts);
+       add_var(&script_snippet, "rebase_root", opts->root ? "t" : "");
+       add_var(&script_snippet, "squash_onto",
+               opts->squash_onto ? oid_to_hex(opts->squash_onto) : "");
 
        switch (opts->type) {
        case REBASE_AM:
@@ -286,7 +416,7 @@ static int run_specific_rebase(struct rebase_options *opts)
        } else if (status == 2) {
                struct strbuf dir = STRBUF_INIT;
 
-               apply_autostash();
+               apply_autostash(opts);
                strbuf_addstr(&dir, opts->state_dir);
                remove_dir_recursively(&dir, 0);
                strbuf_release(&dir);
@@ -409,6 +539,23 @@ static int rebase_config(const char *var, const char *value, void *data)
                return 0;
        }
 
+       if (!strcmp(var, "rebase.autosquash")) {
+               opts->autosquash = git_config_bool(var, value);
+               return 0;
+       }
+
+       if (!strcmp(var, "commit.gpgsign")) {
+               free(opts->gpg_sign_opt);
+               opts->gpg_sign_opt = git_config_bool(var, value) ?
+                       xstrdup("-S") : NULL;
+               return 0;
+       }
+
+       if (!strcmp(var, "rebase.autostash")) {
+               opts->autostash = git_config_bool(var, value);
+               return 0;
+       }
+
        return git_default_config(var, value, data);
 }
 
@@ -452,12 +599,67 @@ static int can_fast_forward(struct commit *onto, struct object_id *head_oid,
        return res && is_linear_history(onto, head);
 }
 
+/* -i followed by -m is still -i */
+static int parse_opt_merge(const struct option *opt, const char *arg, int unset)
+{
+       struct rebase_options *opts = opt->value;
+
+       if (!is_interactive(opts))
+               opts->type = REBASE_MERGE;
+
+       return 0;
+}
+
+/* -i followed by -p is still explicitly interactive, but -p alone is not */
+static int parse_opt_interactive(const struct option *opt, const char *arg,
+                                int unset)
+{
+       struct rebase_options *opts = opt->value;
+
+       opts->type = REBASE_INTERACTIVE;
+       opts->flags |= REBASE_INTERACTIVE_EXPLICIT;
+
+       return 0;
+}
+
+static void NORETURN error_on_missing_default_upstream(void)
+{
+       struct branch *current_branch = branch_get(NULL);
+
+       printf(_("%s\n"
+                "Please specify which branch you want to rebase against.\n"
+                "See git-rebase(1) for details.\n"
+                "\n"
+                "    git rebase '<branch>'\n"
+                "\n"),
+               current_branch ? _("There is no tracking information for "
+                       "the current branch.") :
+                       _("You are not currently on a branch."));
+
+       if (current_branch) {
+               const char *remote = current_branch->remote_name;
+
+               if (!remote)
+                       remote = _("<remote>");
+
+               printf(_("If you wish to set tracking information for this "
+                        "branch you can do so with:\n"
+                        "\n"
+                        "    git branch --set-upstream-to=%s/<branch> %s\n"
+                        "\n"),
+                      remote, current_branch->name);
+       }
+       exit(1);
+}
+
 int cmd_rebase(int argc, const char **argv, const char *prefix)
 {
        struct rebase_options options = {
                .type = REBASE_UNSPECIFIED,
                .flags = REBASE_NO_QUIET,
                .git_am_opt = STRBUF_INIT,
+               .allow_rerere_autoupdate  = -1,
+               .allow_empty_message = 1,
        };
        const char *branch_name;
        int ret, flags, total_argc, in_progress = 0;
@@ -475,6 +677,18 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
                ACTION_EDIT_TODO,
                ACTION_SHOW_CURRENT_PATCH,
        } action = NO_ACTION;
+       int committer_date_is_author_date = 0;
+       int ignore_date = 0;
+       int ignore_whitespace = 0;
+       const char *gpg_sign = NULL;
+       int opt_c = -1;
+       struct string_list whitespace = STRING_LIST_INIT_NODUP;
+       struct string_list exec = STRING_LIST_INIT_NODUP;
+       const char *rebase_merges = NULL;
+       int fork_point = -1;
+       struct string_list strategy_options = STRING_LIST_INIT_NODUP;
+       struct object_id squash_onto;
+       char *squash_onto_name = NULL;
        struct option builtin_rebase_options[] = {
                OPT_STRING(0, "onto", &options.onto_name,
                           N_("revision"),
@@ -490,6 +704,15 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
                {OPTION_NEGBIT, 'n', "no-stat", &options.flags, NULL,
                        N_("do not show diffstat of what changed upstream"),
                        PARSE_OPT_NOARG, NULL, REBASE_DIFFSTAT },
+               OPT_BOOL(0, "ignore-whitespace", &ignore_whitespace,
+                        N_("passed to 'git apply'")),
+               OPT_BOOL(0, "signoff", &options.signoff,
+                        N_("add a Signed-off-by: line to each commit")),
+               OPT_BOOL(0, "committer-date-is-author-date",
+                        &committer_date_is_author_date,
+                        N_("passed to 'git am'")),
+               OPT_BOOL(0, "ignore-date", &ignore_date,
+                        N_("passed to 'git am'")),
                OPT_BIT('f', "force-rebase", &options.flags,
                        N_("cherry-pick all commits, even if unchanged"),
                        REBASE_FORCE),
@@ -510,6 +733,55 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
                OPT_CMDMODE(0, "show-current-patch", &action,
                            N_("show the patch file being applied or merged"),
                            ACTION_SHOW_CURRENT_PATCH),
+               { OPTION_CALLBACK, 'm', "merge", &options, NULL,
+                       N_("use merging strategies to rebase"),
+                       PARSE_OPT_NOARG | PARSE_OPT_NONEG,
+                       parse_opt_merge },
+               { OPTION_CALLBACK, 'i', "interactive", &options, NULL,
+                       N_("let the user edit the list of commits to rebase"),
+                       PARSE_OPT_NOARG | PARSE_OPT_NONEG,
+                       parse_opt_interactive },
+               OPT_SET_INT('p', "preserve-merges", &options.type,
+                           N_("try to recreate merges instead of ignoring "
+                              "them"), REBASE_PRESERVE_MERGES),
+               OPT_BOOL(0, "rerere-autoupdate",
+                        &options.allow_rerere_autoupdate,
+                        N_("allow rerere to update index  with resolved "
+                           "conflict")),
+               OPT_BOOL('k', "keep-empty", &options.keep_empty,
+                        N_("preserve empty commits during rebase")),
+               OPT_BOOL(0, "autosquash", &options.autosquash,
+                        N_("move commits that begin with "
+                           "squash!/fixup! under -i")),
+               { OPTION_STRING, 'S', "gpg-sign", &gpg_sign, N_("key-id"),
+                       N_("GPG-sign commits"),
+                       PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
+               OPT_STRING_LIST(0, "whitespace", &whitespace,
+                               N_("whitespace"), N_("passed to 'git apply'")),
+               OPT_SET_INT('C', NULL, &opt_c, N_("passed to 'git apply'"),
+                           REBASE_AM),
+               OPT_BOOL(0, "autostash", &options.autostash,
+                        N_("automatically stash/stash pop before and after")),
+               OPT_STRING_LIST('x', "exec", &exec, N_("exec"),
+                               N_("add exec lines after each commit of the "
+                                  "editable list")),
+               OPT_BOOL(0, "allow-empty-message",
+                        &options.allow_empty_message,
+                        N_("allow rebasing commits with empty messages")),
+               {OPTION_STRING, 'r', "rebase-merges", &rebase_merges,
+                       N_("mode"),
+                       N_("try to rebase merges instead of skipping them"),
+                       PARSE_OPT_OPTARG, NULL, (intptr_t)""},
+               OPT_BOOL(0, "fork-point", &fork_point,
+                        N_("use 'merge-base --fork-point' to refine upstream")),
+               OPT_STRING('s', "strategy", &options.strategy,
+                          N_("strategy"), N_("use the given merge strategy")),
+               OPT_STRING_LIST('X', "strategy-option", &strategy_options,
+                               N_("option"),
+                               N_("pass the argument through to the merge "
+                                  "strategy")),
+               OPT_BOOL(0, "root", &options.root,
+                        N_("rebase all reachable commits up to the root(s)")),
                OPT_END(),
        };
 
@@ -539,6 +811,11 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 
        git_config(rebase_config, &options);
 
+       strbuf_reset(&buf);
+       strbuf_addf(&buf, "%s/applying", apply_dir());
+       if(file_exists(buf.buf))
+               die(_("It looks like 'git am' is in progress. Cannot rebase."));
+
        if (is_directory(apply_dir())) {
                options.type = REBASE_AM;
                options.state_dir = apply_dir();
@@ -577,6 +854,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
                usage_with_options(builtin_rebase_usage,
                                   builtin_rebase_options);
 
+       if (action != NO_ACTION && !in_progress)
+               die(_("No rebase in progress?"));
+
        if (action == ACTION_EDIT_TODO && !is_interactive(&options))
                die(_("The --edit-todo action can only be used during "
                      "interactive rebase."));
@@ -687,6 +967,101 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
        if (!(options.flags & REBASE_NO_QUIET))
                strbuf_addstr(&options.git_am_opt, " -q");
 
+       if (committer_date_is_author_date) {
+               strbuf_addstr(&options.git_am_opt,
+                             " --committer-date-is-author-date");
+               options.flags |= REBASE_FORCE;
+       }
+
+       if (ignore_whitespace)
+               strbuf_addstr(&options.git_am_opt, " --ignore-whitespace");
+
+       if (ignore_date) {
+               strbuf_addstr(&options.git_am_opt, " --ignore-date");
+               options.flags |= REBASE_FORCE;
+       }
+
+       if (options.keep_empty)
+               imply_interactive(&options, "--keep-empty");
+
+       if (gpg_sign) {
+               free(options.gpg_sign_opt);
+               options.gpg_sign_opt = xstrfmt("-S%s", gpg_sign);
+       }
+
+       if (opt_c >= 0)
+               strbuf_addf(&options.git_am_opt, " -C%d", opt_c);
+
+       if (whitespace.nr) {
+               int i;
+
+               for (i = 0; i < whitespace.nr; i++) {
+                       const char *item = whitespace.items[i].string;
+
+                       strbuf_addf(&options.git_am_opt, " --whitespace=%s",
+                                   item);
+
+                       if ((!strcmp(item, "fix")) || (!strcmp(item, "strip")))
+                               options.flags |= REBASE_FORCE;
+               }
+       }
+
+       if (exec.nr) {
+               int i;
+
+               imply_interactive(&options, "--exec");
+
+               strbuf_reset(&buf);
+               for (i = 0; i < exec.nr; i++)
+                       strbuf_addf(&buf, "exec %s\n", exec.items[i].string);
+               options.cmd = xstrdup(buf.buf);
+       }
+
+       if (rebase_merges) {
+               if (!*rebase_merges)
+                       ; /* default mode; do nothing */
+               else if (!strcmp("rebase-cousins", rebase_merges))
+                       options.rebase_cousins = 1;
+               else if (strcmp("no-rebase-cousins", rebase_merges))
+                       die(_("Unknown mode: %s"), rebase_merges);
+               options.rebase_merges = 1;
+               imply_interactive(&options, "--rebase-merges");
+       }
+
+       if (strategy_options.nr) {
+               int i;
+
+               if (!options.strategy)
+                       options.strategy = "recursive";
+
+               strbuf_reset(&buf);
+               for (i = 0; i < strategy_options.nr; i++)
+                       strbuf_addf(&buf, " --%s",
+                                   strategy_options.items[i].string);
+               options.strategy_opts = xstrdup(buf.buf);
+       }
+
+       if (options.strategy) {
+               options.strategy = xstrdup(options.strategy);
+               switch (options.type) {
+               case REBASE_AM:
+                       die(_("--strategy requires --merge or --interactive"));
+               case REBASE_MERGE:
+               case REBASE_INTERACTIVE:
+               case REBASE_PRESERVE_MERGES:
+                       /* compatible */
+                       break;
+               case REBASE_UNSPECIFIED:
+                       options.type = REBASE_MERGE;
+                       break;
+               default:
+                       BUG("unhandled rebase type (%d)", options.type);
+               }
+       }
+
+       if (options.root && !options.onto_name)
+               imply_interactive(&options, "--root without --onto");
+
        switch (options.type) {
        case REBASE_MERGE:
        case REBASE_INTERACTIVE:
@@ -703,10 +1078,26 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
                break;
        }
 
+       if (options.signoff) {
+               if (options.type == REBASE_PRESERVE_MERGES)
+                       die("cannot combine '--signoff' with "
+                           "'--preserve-merges'");
+               strbuf_addstr(&options.git_am_opt, " --signoff");
+               options.flags |= REBASE_FORCE;
+       }
+
        if (!options.root) {
-               if (argc < 1)
-                       die("TODO: handle @{upstream}");
-               else {
+               if (argc < 1) {
+                       struct branch *branch;
+
+                       branch = branch_get(NULL);
+                       options.upstream_name = branch_get_upstream(branch,
+                                                                   NULL);
+                       if (!options.upstream_name)
+                               error_on_missing_default_upstream();
+                       if (fork_point < 0)
+                               fork_point = 1;
+               } else {
                        options.upstream_name = argv[0];
                        argc--;
                        argv++;
@@ -717,8 +1108,22 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
                if (!options.upstream)
                        die(_("invalid upstream '%s'"), options.upstream_name);
                options.upstream_arg = options.upstream_name;
-       } else
-               die("TODO: upstream for --root");
+       } else {
+               if (!options.onto_name) {
+                       if (commit_tree("", 0, the_hash_algo->empty_tree, NULL,
+                                       &squash_onto, NULL, NULL) < 0)
+                               die(_("Could not create new root commit"));
+                       options.squash_onto = &squash_onto;
+                       options.onto_name = squash_onto_name =
+                               xstrdup(oid_to_hex(&squash_onto));
+               }
+               options.upstream_name = NULL;
+               options.upstream = NULL;
+               if (argc > 1)
+                       usage_with_options(builtin_rebase_usage,
+                                          builtin_rebase_options);
+               options.upstream_arg = "--root";
+       }
 
        /* Make sure the branch to rebase onto is valid. */
        if (!options.onto_name)
@@ -781,9 +1186,73 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
        } else
                BUG("unexpected number of arguments left to parse");
 
+       if (fork_point > 0) {
+               struct commit *head =
+                       lookup_commit_reference(the_repository,
+                                               &options.orig_head);
+               options.restrict_revision =
+                       get_fork_point(options.upstream_name, head);
+       }
+
        if (read_index(the_repository->index) < 0)
                die(_("could not read index"));
 
+       if (options.autostash) {
+               struct lock_file lock_file = LOCK_INIT;
+               int fd;
+
+               fd = hold_locked_index(&lock_file, 0);
+               refresh_cache(REFRESH_QUIET);
+               if (0 <= fd)
+                       update_index_if_able(&the_index, &lock_file);
+               rollback_lock_file(&lock_file);
+
+               if (has_unstaged_changes(0) || has_uncommitted_changes(0)) {
+                       const char *autostash =
+                               state_dir_path("autostash", &options);
+                       struct child_process stash = CHILD_PROCESS_INIT;
+                       struct object_id oid;
+                       struct commit *head =
+                               lookup_commit_reference(the_repository,
+                                                       &options.orig_head);
+
+                       argv_array_pushl(&stash.args,
+                                        "stash", "create", "autostash", NULL);
+                       stash.git_cmd = 1;
+                       stash.no_stdin = 1;
+                       strbuf_reset(&buf);
+                       if (capture_command(&stash, &buf, GIT_MAX_HEXSZ))
+                               die(_("Cannot autostash"));
+                       strbuf_trim_trailing_newline(&buf);
+                       if (get_oid(buf.buf, &oid))
+                               die(_("Unexpected stash response: '%s'"),
+                                   buf.buf);
+                       strbuf_reset(&buf);
+                       strbuf_add_unique_abbrev(&buf, &oid, DEFAULT_ABBREV);
+
+                       if (safe_create_leading_directories_const(autostash))
+                               die(_("Could not create directory for '%s'"),
+                                   options.state_dir);
+                       write_file(autostash, "%s", buf.buf);
+                       printf(_("Created autostash: %s\n"), buf.buf);
+                       if (reset_head(&head->object.oid, "reset --hard",
+                                      NULL, 0) < 0)
+                               die(_("could not reset --hard"));
+                       printf(_("HEAD is now at %s"),
+                              find_unique_abbrev(&head->object.oid,
+                                                 DEFAULT_ABBREV));
+                       strbuf_reset(&buf);
+                       pp_commit_easy(CMIT_FMT_ONELINE, head, &buf);
+                       if (buf.len > 0)
+                               printf(" %s", buf.buf);
+                       putchar('\n');
+
+                       if (discard_index(the_repository->index) < 0 ||
+                               read_index(the_repository->index) < 0)
+                               die(_("could not read index"));
+               }
+       }
+
        if (require_clean_work_tree("rebase",
                                    _("Please commit or stash them."), 1, 1)) {
                ret = 1;
@@ -802,6 +1271,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
         */
        if (can_fast_forward(options.onto, &options.orig_head, &merge_base) &&
            !is_interactive(&options) && !options.restrict_revision &&
+           options.upstream &&
            !oidcmp(&options.upstream->object.oid, &options.onto->object.oid)) {
                int flag;
 
@@ -876,6 +1346,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
                diff_flush(&opts);
        }
 
+       if (is_interactive(&options))
+               goto run_rebase;
+
        /* Detach HEAD and reset the tree */
        if (options.flags & REBASE_NO_QUIET)
                printf(_("First, rewinding head to replay your work on top of "
@@ -901,5 +1374,8 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 cleanup:
        strbuf_release(&revisions);
        free(options.head_name);
+       free(options.gpg_sign_opt);
+       free(options.cmd);
+       free(squash_onto_name);
        return ret;
 }