[PATCH v2 2/3] builtin/branch: clean up action-picking logic in cmd_branch()

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Add a variable, noncreate_actions, to cmd_branch() that will tell us
whether or not cmd_branch() will default to creating a branch (instead
of performing another action). 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.

Incidentally, fix an incorrect usage string that combined the 'list'
usage of git branch (-l) with the 'create' usage; this string has been
incorrect since its inception, a8dfd5eac4 (Make builtin-branch.c use
parse_options., 2007-10-07).

Signed-off-by: Glen Choo <chooglen@xxxxxxxxxx>
---
 builtin/branch.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/builtin/branch.c b/builtin/branch.c
index 19f2845e7a..83b8016b38 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -27,7 +27,7 @@
 
 static const char * const builtin_branch_usage[] = {
 	N_("git branch [<options>] [-r | -a] [--merged] [--no-merged]"),
-	N_("git branch [<options>] [-l] [-f] <branch-name> [<start-point>]"),
+	N_("git branch [<options>] [-l] [<pattern>...]"),
 	N_("git branch [<options>] [-r] (-d | -D) <branch-name>..."),
 	N_("git branch [<options>] (-m | -M) [<old-branch>] <new-branch>"),
 	N_("git branch [<options>] (-c | -C) [<old-branch>] <new-branch>"),
@@ -616,14 +616,15 @@ static int edit_branch_description(const char *branch_name)
 
 int cmd_branch(int argc, const char **argv, const char *prefix)
 {
-	int delete = 0, rename = 0, copy = 0, force = 0, list = 0;
-	int show_current = 0;
-	int reflog = 0, edit_description = 0;
-	int quiet = 0, unset_upstream = 0;
+	/* possible actions */
+	int delete = 0, rename = 0, copy = 0, force = 0, list = 0,
+	    unset_upstream = 0, show_current = 0, edit_description = 0;
+	int noncreate_actions = 0;
+	/* possible options */
+	int reflog = 0, quiet = 0, icase = 0;
 	const char *new_upstream = NULL;
 	enum branch_track track;
 	struct ref_filter filter;
-	int icase = 0;
 	static struct ref_sorting *sorting;
 	struct string_list sorting_options = STRING_LIST_INIT_DUP;
 	struct ref_format format = REF_FORMAT_INIT;
@@ -706,8 +707,10 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 	    filter.reachable_from || filter.unreachable_from || filter.points_at.nr)
 		list = 1;
 
-	if (!!delete + !!rename + !!copy + !!new_upstream + !!show_current +
-	    list + edit_description + unset_upstream > 1)
+	noncreate_actions = !!delete + !!rename + !!copy + !!new_upstream +
+			    !!show_current + !!list + !!edit_description +
+			    !!unset_upstream;
+	if (noncreate_actions > 1)
 		usage_with_options(builtin_branch_usage, options);
 
 	if (filter.abbrev == -1)
@@ -845,7 +848,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 		strbuf_addf(&buf, "branch.%s.merge", branch->name);
 		git_config_set_multivar(buf.buf, NULL, NULL, CONFIG_FLAGS_MULTI_REPLACE);
 		strbuf_release(&buf);
-	} else if (argc > 0 && argc <= 2) {
+	} else if (!noncreate_actions && argc > 0 && argc <= 2) {
 		if (filter.kind != FILTER_REFS_BRANCHES)
 			die(_("The -a, and -r, options to 'git branch' do not take a branch name.\n"
 				  "Did you mean to use: -a|-r --list <pattern>?"));
-- 
2.33.GIT




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