builtin/branch: consolidate action-picking logic in cmd_branch()

Consolidate the logic for deciding when to create a new branch in cmd_branch(), and save the result for reuse. Besides making the function more explicit, this allows us to validate options that can only be used when creating a branch. Such an option does not exist yet, but one will be introduced in a subsequent commit. Helped-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Glen Choo <chooglen@google.com> Reviewed-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Glen Choo committed Jan 28, 2022 at 16:04 UTC 6e0a2ca0277e6010cd403c70d8f15b66af345d33
1 file changed +11 -8
builtin/branch.c
+11 -8
@@ -616,14 +616,15 @@ static int edit_branch_description(const char *branch_name)
616
617 int cmd_branch(int argc, const char **argv, const char *prefix)
618 {
619 - int delete = 0, rename = 0, copy = 0, force = 0, list = 0;
620 - int show_current = 0;
621 - int reflog = 0, edit_description = 0;
622 - int quiet = 0, unset_upstream = 0;
619 + /* possible actions */
620 + int delete = 0, rename = 0, copy = 0, list = 0,
621 + unset_upstream = 0, show_current = 0, edit_description = 0;
622 const char *new_upstream = NULL;
623 + int noncreate_actions = 0;
624 + /* possible options */
625 + int reflog = 0, quiet = 0, icase = 0, force = 0;
626 enum branch_track track;
627 struct ref_filter filter;
626 - int icase = 0;
628 static struct ref_sorting *sorting;
629 struct string_list sorting_options = STRING_LIST_INIT_DUP;
630 struct ref_format format = REF_FORMAT_INIT;
@@ -708,8 +709,10 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
709 filter.reachable_from || filter.unreachable_from || filter.points_at.nr)
710 list = 1;
711
711 - if (!!delete + !!rename + !!copy + !!new_upstream + !!show_current +
712 - list + edit_description + unset_upstream > 1)
712 + noncreate_actions = !!delete + !!rename + !!copy + !!new_upstream +
713 + !!show_current + !!list + !!edit_description +
714 + !!unset_upstream;
715 + if (noncreate_actions > 1)
716 usage_with_options(builtin_branch_usage, options);
717
718 if (filter.abbrev == -1)
@@ -849,7 +852,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
852 strbuf_addf(&buf, "branch.%s.merge", branch->name);
853 git_config_set_multivar(buf.buf, NULL, NULL, CONFIG_FLAGS_MULTI_REPLACE);
854 strbuf_release(&buf);
852 - } else if (argc > 0 && argc <= 2) {
855 + } else if (!noncreate_actions && argc > 0 && argc <= 2) {
856 if (filter.kind != FILTER_REFS_BRANCHES)
857 die(_("The -a, and -r, options to 'git branch' do not take a branch name.\n"
858 "Did you mean to use: -a|-r --list <pattern>?"));