Merge branch 'rs/diff-parseopts'

The way the diff machinery prepares the options array for the
parse_options API has been refactored to avoid resource leaks.

* rs/diff-parseopts:
  diff: remove parseopts member from struct diff_options
  diff: use add_diff_options() in diff_opt_parse()
  diff: factor out add_diff_options()

Author: gitster

builtin/range-diff.c

@@ -47,7 +47,7 @@ int cmd_range_diff(int argc, const char **argv, const char *prefix)
 
 	repo_diff_setup(the_repository, &diffopt);
 
-	options = parse_options_concat(range_diff_options, diffopt.parseopts);
+	options = add_diff_options(range_diff_options, &diffopt);
 	argc = parse_options(argc, argv, prefix, options,
 			     builtin_range_diff_usage, PARSE_OPT_KEEP_DASHDASH);
 

diff-no-index.c

@@ -255,8 +255,7 @@ int diff_no_index(struct rev_info *revs,
 	};
 	struct option *options;
 
-	options = parse_options_concat(no_index_options,
-				       revs->diffopt.parseopts);
+	options = add_diff_options(no_index_options, &revs->diffopt);
 	argc = parse_options(argc, argv, revs->prefix, options,
 			     diff_no_index_usage, 0);
 	if (argc != 2) {

diff.c

@@ -4615,8 +4615,6 @@ static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
 	builtin_checkdiff(name, other, attr_path, p->one, p->two, o);
 }
 
-static void prep_parse_options(struct diff_options *options);
-
 void repo_diff_setup(struct repository *r, struct diff_options *options)
 {
 	memcpy(options, &default_diff_options, sizeof(*options));
@@ -4662,8 +4660,6 @@ void repo_diff_setup(struct repository *r, struct diff_options *options)
 
 	options->color_moved = diff_color_moved_default;
 	options->color_moved_ws_handling = diff_color_moved_ws_default;
-
-	prep_parse_options(options);
 }
 
 static const char diff_status_letters[] = {
@@ -4821,8 +4817,6 @@ void diff_setup_done(struct diff_options *options)
 			options->filter = ~filter_bit[DIFF_STATUS_FILTER_AON];
 		options->filter &= ~options->filter_not;
 	}
-
-	FREE_AND_NULL(options->parseopts);
 }
 
 int parse_long_opt(const char *opt, const char **argv,
@@ -5419,7 +5413,8 @@ static int diff_opt_rotate_to(const struct option *opt, const char *arg, int uns
 	return 0;
 }
 
-static void prep_parse_options(struct diff_options *options)
+struct option *add_diff_options(const struct option *opts,
+				struct diff_options *options)
 {
 	struct option parseopts[] = {
 		OPT_GROUP(N_("Diff output format options")),
@@ -5689,22 +5684,25 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_END()
 	};
 
-	ALLOC_ARRAY(options->parseopts, ARRAY_SIZE(parseopts));
-	memcpy(options->parseopts, parseopts, sizeof(parseopts));
+	return parse_options_concat(opts, parseopts);
 }
 
 int diff_opt_parse(struct diff_options *options,
 		   const char **av, int ac, const char *prefix)
 {
+	struct option no_options[] = { OPT_END() };
+	struct option *parseopts = add_diff_options(no_options, options);
+
 	if (!prefix)
 		prefix = "";
 
-	ac = parse_options(ac, av, prefix, options->parseopts, NULL,
+	ac = parse_options(ac, av, prefix, parseopts, NULL,
 			   PARSE_OPT_KEEP_DASHDASH |
 			   PARSE_OPT_KEEP_UNKNOWN_OPT |
 			   PARSE_OPT_NO_INTERNAL_HELP |
 			   PARSE_OPT_ONE_SHOT |
 			   PARSE_OPT_STOP_AT_NON_OPTION);
+	free(parseopts);
 
 	return ac;
 }
@@ -6513,7 +6511,6 @@ void diff_free(struct diff_options *options)
 	diff_free_file(options);
 	diff_free_ignore_regex(options);
 	clear_pathspec(&options->pathspec);
-	FREE_AND_NULL(options->parseopts);
 }
 
 void diff_flush(struct diff_options *options)

diff.h

@@ -394,7 +394,6 @@ struct diff_options {
 	unsigned color_moved_ws_handling;
 
 	struct repository *repo;
-	struct option *parseopts;
 	struct strmap *additional_path_headers;
 
 	int no_free;
@@ -539,6 +538,7 @@ int git_diff_ui_config(const char *var, const char *value, void *cb);
 #define diff_setup(diffopts) repo_diff_setup(the_repository, diffopts)
 #endif
 void repo_diff_setup(struct repository *, struct diff_options *);
+struct option *add_diff_options(const struct option *, struct diff_options *);
 int diff_opt_parse(struct diff_options *, const char **, int, const char *);
 void diff_setup_done(struct diff_options *);
 int git_config_rename(const char *var, const char *value);