+static int stdout_is_tty;
+static int get_colorbool_found;
+static int get_diff_color_found;
+static int git_get_colorbool_config(const char *var, const char *value)
+{
+ if (!strcmp(var, get_color_slot)) {
+ get_colorbool_found =
+ git_config_colorbool(var, value, stdout_is_tty);
+ }
+ if (!strcmp(var, "diff.color")) {
+ get_diff_color_found =
+ git_config_colorbool(var, value, stdout_is_tty);
+ }
+ return 0;
+}
+
+static int get_colorbool(int argc, const char **argv)
+{
+ /*
+ * git config --get-colorbool <slot> [<stdout-is-tty>]
+ *
+ * returns "true" or "false" depending on how <slot>
+ * is configured.
+ */
+
+ if (argc == 2)
+ stdout_is_tty = git_config_bool("command line", argv[1]);
+ else if (argc == 1)
+ stdout_is_tty = isatty(1);
+ else
+ usage(git_config_set_usage);
+ get_colorbool_found = -1;
+ get_diff_color_found = -1;
+ get_color_slot = argv[0];
+ git_config(git_get_colorbool_config);
+
+ if (get_colorbool_found < 0) {
+ if (!strcmp(get_color_slot, "color.diff"))
+ get_colorbool_found = get_diff_color_found;
+ if (get_colorbool_found < 0)
+ get_colorbool_found = 0;
+ }
+
+ if (argc == 1) {
+ return get_colorbool_found ? 0 : 1;
+ } else {
+ printf("%s\n", get_colorbool_found ? "true" : "false");
+ return 0;
+ }
+}
+