git-apply: do not fail on binary diff when not applying nor checking.

We run git-apply with --stat and --summary at the end of the pull
by default, which causes it to barf when the pull brought in changes
to binary files.  Just mark them as binary patch and proceed when
not applying nor checking.

[jc: I almost missed --check until I saw Linus did something similar.]

Signed-off-by: Junio C Hamano <junkio@cox.net>

apply.c

@@ -53,7 +53,7 @@ struct fragment {
 struct patch {
 	char *new_name, *old_name, *def_name;
 	unsigned int old_mode, new_mode;
-	int is_rename, is_copy, is_new, is_delete;
+	int is_rename, is_copy, is_new, is_delete, is_binary;
 	int lines_added, lines_deleted;
 	int score;
 	struct fragment *fragments;
@@ -890,8 +890,18 @@ static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
 
 	patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
 
-	if (!patchsize && !metadata_changes(patch))
-		die("patch with only garbage at line %d", linenr);
+	if (!patchsize && !metadata_changes(patch)) {
+		static const char binhdr[] = "Binary files ";
+
+		if (sizeof(binhdr) - 1 < size - offset - hdrsize &&
+		    !memcmp(binhdr, buffer + hdrsize, sizeof(binhdr)-1))
+			patch->is_binary = 1;
+
+		if (patch->is_binary && !apply && !check)
+			;
+		else
+			die("patch with only garbage at line %d", linenr);
+	}
 
 	return offset + hdrsize + patchsize;
 }
@@ -949,9 +959,12 @@ static void show_stats(struct patch *patch)
 		add = (add * max + max_change / 2) / max_change;
 		del = total - add;
 	}
-	printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
-		len, name, patch->lines_added + patch->lines_deleted,
-		add, pluses, del, minuses);
+	if (patch->is_binary)
+		printf(" %s%-*s |  Bin\n", prefix, len, name);
+	else
+		printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
+		       len, name, patch->lines_added + patch->lines_deleted,
+		       add, pluses, del, minuses);
 	if (qname)
 		free(qname);
 }