shortlog -w: make wrap-line behaviour optional.

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

builtin-shortlog.c

@@ -277,11 +277,64 @@ static void get_from_rev(struct rev_info *rev, struct path_list *list)
 
 }
 
+static int parse_uint(char const **arg, int comma)
+{
+	unsigned long ul;
+	int ret;
+	char *endp;
+
+	ul = strtoul(*arg, &endp, 10);
+	if (endp != *arg && *endp && *endp != comma)
+		return -1;
+	ret = (int) ul;
+	if (ret != ul)
+		return -1;
+	*arg = endp;
+	if (**arg)
+		(*arg)++;
+	return ret;
+}
+
+static const char wrap_arg_usage[] = "-w[<width>[,<indent1>[,<indent2>]]]";
+#define DEFAULT_WRAPLEN 76
+#define DEFAULT_INDENT1 6
+#define DEFAULT_INDENT2 9
+
+static void parse_wrap_args(const char *arg, int *in1, int *in2, int *wrap)
+{
+	arg += 2; /* skip -w */
+
+	*wrap = parse_uint(&arg, ',');
+	if (*wrap < 0)
+		die(wrap_arg_usage);
+	*in1 = parse_uint(&arg, ',');
+	if (*in1 < 0)
+		die(wrap_arg_usage);
+	*in2 = parse_uint(&arg, '\0');
+	if (*in2 < 0)
+		die(wrap_arg_usage);
+
+	if (!*wrap)
+		*wrap = DEFAULT_WRAPLEN;
+	if (!*in1)
+		*in1 = DEFAULT_INDENT1;
+	if (!*in2)
+		*in2 = DEFAULT_INDENT2;
+	if (*wrap &&
+	    ((*in1 && *wrap <= *in1) ||
+	     (*in2 && *wrap <= *in2)))
+		die(wrap_arg_usage);
+}
+
 int cmd_shortlog(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info rev;
 	struct path_list list = { NULL, 0, 0, 1 };
 	int i, j, sort_by_number = 0, summary = 0;
+	int wrap_lines = 0;
+	int wrap = DEFAULT_WRAPLEN;
+	int in1 = DEFAULT_INDENT1;
+	int in2 = DEFAULT_INDENT2;
 
 	/* since -n is a shadowed rev argument, parse our args first */
 	while (argc > 1) {
@@ -290,6 +343,10 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 		else if (!strcmp(argv[1], "-s") ||
 				!strcmp(argv[1], "--summary"))
 			summary = 1;
+		else if (!prefixcmp(argv[1], "-w")) {
+			wrap_lines = 1;
+			parse_wrap_args(argv[1], &in1, &in2, &wrap);
+		}
 		else if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
 			usage(shortlog_usage);
 		else
@@ -325,10 +382,15 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 		} else {
 			printf("%s (%d):\n", list.items[i].path, onelines->nr);
 			for (j = onelines->nr - 1; j >= 0; j--) {
-				int col = print_wrapped_text(onelines->items[j].path,
-							     6, 9, 76);
-				if (col != 76)
-					putchar('\n');
+				const char *msg = onelines->items[j].path;
+
+				if (wrap_lines) {
+					int col = print_wrapped_text(msg, in1, in2, wrap);
+					if (col != wrap)
+						putchar('\n');
+				}
+				else
+					printf("      %s\n", msg);
 			}
 			putchar('\n');
 		}

t/t4201-shortlog.sh

@@ -29,7 +29,7 @@ git commit -m "$(echo "This is a very, very long first line for the commit messa
 echo 5 > a1
 git commit -m "a								12	34	56	78" a1
 
-git shortlog HEAD > out
+git shortlog -w HEAD > out
 
 cat > expect << EOF
 A U Thor (5):