1 files changed, 56 insertions, 10 deletions

diff --git a/diff.c b/diff.c
index 2253ec8802..4acccd9d7e 100644
--- a/diff.c
+++ b/diff.c
@@ -2233,14 +2233,12 @@ static void init_diff_words_data(struct emit_callback *ecbdata,
 	struct diff_options *o = xmalloc(sizeof(struct diff_options));
 	memcpy(o, orig_opts, sizeof(struct diff_options));
 
-	ecbdata->diff_words =
-		xcalloc(1, sizeof(struct diff_words_data));
+	CALLOC_ARRAY(ecbdata->diff_words, 1);
 	ecbdata->diff_words->type = o->word_diff;
 	ecbdata->diff_words->opt = o;
 
 	if (orig_opts->emitted_symbols)
-		o->emitted_symbols =
-			xcalloc(1, sizeof(struct emitted_diff_symbols));
+		CALLOC_ARRAY(o->emitted_symbols, 1);
 
 	if (!o->word_regex)
 		o->word_regex = userdiff_word_regex(one, o->repo->index);
@@ -2509,7 +2507,7 @@ static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
 					  const char *name_b)
 {
 	struct diffstat_file *x;
-	x = xcalloc(1, sizeof(*x));
+	CALLOC_ARRAY(x, 1);
 	ALLOC_GROW(diffstat->files, diffstat->nr + 1, diffstat->alloc);
 	diffstat->files[diffstat->nr++] = x;
 	if (name_b) {
@@ -4593,6 +4591,9 @@ void repo_diff_setup(struct repository *r, struct diff_options *options)
 
 	options->orderfile = diff_order_file_cfg;
 
+	if (!options->flags.ignore_submodule_set)
+		options->flags.ignore_untracked_in_submodules = 1;
+
 	if (diff_no_prefix) {
 		options->a_prefix = options->b_prefix = "";
 	} else if (!diff_mnemonic_prefix) {
@@ -4915,7 +4916,7 @@ static int diff_opt_find_object(const struct option *option,
 		return error(_("unable to resolve '%s'"), arg);
 
 	if (!opt->objfind)
-		opt->objfind = xcalloc(1, sizeof(*opt->objfind));
+		CALLOC_ARRAY(opt->objfind, 1);
 
 	opt->pickaxe_opts |= DIFF_PICKAXE_KIND_OBJFIND;
 	opt->flags.recursive = 1;
@@ -5345,6 +5346,19 @@ static int diff_opt_word_diff_regex(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_rotate_to(const struct option *opt, const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	if (!strcmp(opt->long_name, "skip-to"))
+		options->skip_instead_of_rotate = 1;
+	else
+		options->skip_instead_of_rotate = 0;
+	options->rotate_to = arg;
+	return 0;
+}
+
 static void prep_parse_options(struct diff_options *options)
 {
 	struct option parseopts[] = {
@@ -5596,6 +5610,12 @@ static void prep_parse_options(struct diff_options *options)
 			  DIFF_PICKAXE_REGEX, PARSE_OPT_NONEG),
 		OPT_FILENAME('O', NULL, &options->orderfile,
 			     N_("control the order in which files appear in the output")),
+		OPT_CALLBACK_F(0, "rotate-to", options, N_("<path>"),
+			       N_("show the change in the specified path first"),
+			       PARSE_OPT_NONEG, diff_opt_rotate_to),
+		OPT_CALLBACK_F(0, "skip-to", options, N_("<path>"),
+			       N_("skip the output to the specified path"),
+			       PARSE_OPT_NONEG, diff_opt_rotate_to),
 		OPT_CALLBACK_F(0, "find-object", options, N_("<object-id>"),
 			       N_("look for differences that change the number of occurrences of the specified object"),
 			       PARSE_OPT_NONEG, diff_opt_find_object),
@@ -6333,6 +6353,32 @@ static void diff_flush_patch_all_file_pairs(struct diff_options *o)
 	}
 }
 
+static void diff_free_file(struct diff_options *options)
+{
+	if (options->close_file)
+		fclose(options->file);
+}
+
+static void diff_free_ignore_regex(struct diff_options *options)
+{
+	int i;
+
+	for (i = 0; i < options->ignore_regex_nr; i++) {
+		regfree(options->ignore_regex[i]);
+		free(options->ignore_regex[i]);
+	}
+	free(options->ignore_regex);
+}
+
+void diff_free(struct diff_options *options)
+{
+	if (options->no_free)
+		return;
+
+	diff_free_file(options);
+	diff_free_ignore_regex(options);
+}
+
 void diff_flush(struct diff_options *options)
 {
 	struct diff_queue_struct *q = &diff_queued_diff;
@@ -6396,8 +6442,7 @@ void diff_flush(struct diff_options *options)
 		 * options->file to /dev/null should be safe, because we
 		 * aren't supposed to produce any output anyway.
 		 */
-		if (options->close_file)
-			fclose(options->file);
+		diff_free_file(options);
 		options->file = xfopen("/dev/null", "w");
 		options->close_file = 1;
 		options->color_moved = 0;
@@ -6430,8 +6475,7 @@ void diff_flush(struct diff_options *options)
 free_queue:
 	free(q->queue);
 	DIFF_QUEUE_CLEAR(q);
-	if (options->close_file)
-		fclose(options->file);
+	diff_free(options);
 
 	/*
 	 * Report the content-level differences with HAS_CHANGES;
@@ -6666,6 +6710,8 @@ void diffcore_std(struct diff_options *options)
 		diffcore_pickaxe(options);
 	if (options->orderfile)
 		diffcore_order(options->orderfile);
+	if (options->rotate_to)
+		diffcore_rotate(options);
 	if (!options->found_follow)
 		/* See try_to_follow_renames() in tree-diff.c */
 		diff_resolve_rename_copy();