Merge branch 'jc/diffcore-rotate'

"git {diff,log} --{skip,rotate}-to=<path>" allows the user to
discard diff output for early paths or move them to the end of the
output.

* jc/diffcore-rotate:
  diff: --{rotate,skip}-to=<path>

1 files changed, 21 insertions, 0 deletions

diff --git a/diff.c b/diff.c
index bf2cbf15e7..6956f5e335 100644
--- a/diff.c
+++ b/diff.c
@@ -5348,6 +5348,19 @@ 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[] = {
@@ -5599,6 +5612,12 @@ 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),
@@ -6693,6 +6712,8 @@ 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();