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-rw-r--r--diff.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/diff.c b/diff.c
index 439d4746c..d57bc299e 100644
--- a/diff.c
+++ b/diff.c
@@ -2496,6 +2496,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
DIFF_OPT_SET(options, ALLOW_EXTERNAL);
else if (!strcmp(arg, "--no-ext-diff"))
DIFF_OPT_CLR(options, ALLOW_EXTERNAL);
+ else if (!strcmp(arg, "--ignore-submodules"))
+ DIFF_OPT_SET(options, IGNORE_SUBMODULES);
/* misc options */
else if (!strcmp(arg, "-z"))
@@ -3355,6 +3357,9 @@ void diff_addremove(struct diff_options *options,
char concatpath[PATH_MAX];
struct diff_filespec *one, *two;
+ if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(mode))
+ return;
+
/* This may look odd, but it is a preparation for
* feeding "there are unchanged files which should
* not produce diffs, but when you are doing copy
@@ -3399,6 +3404,10 @@ void diff_change(struct diff_options *options,
char concatpath[PATH_MAX];
struct diff_filespec *one, *two;
+ if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(old_mode)
+ && S_ISGITLINK(new_mode))
+ return;
+
if (DIFF_OPT_TST(options, REVERSE_DIFF)) {
unsigned tmp;
const unsigned char *tmp_c;