grep -p: support user defined regular expressions

Respect the userdiff attributes and config settings when looking for
lines with function definitions in git grep -p.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/builtin-grep.c b/builtin-grep.c
index 037452ec79..9343cc5e5d 100644
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -11,6 +11,7 @@
 #include "tree-walk.h"
 #include "builtin.h"
 #include "parse-options.h"
+#include "userdiff.h"
 #include "grep.h"
 
 #ifndef NO_EXTERNAL_GREP
@@ -30,6 +31,12 @@ static int grep_config(const char *var, const char *value, void *cb)
 {
 	struct grep_opt *opt = cb;
 
+	switch (userdiff_config(var, value)) {
+	case 0: break;
+	case -1: return -1;
+	default: return 0;
+	}
+
 	if (!strcmp(var, "color.grep")) {
 		opt->color = git_config_colorbool(var, value, -1);
 		return 0;