git-check-attr: Extract a function error_with_usage()

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/check-attr.c b/builtin/check-attr.c
index c5270786d476271ca7cd25a27a9eeffc99aa3dad..d0042227c219d4e595cf73059af28318da7f3b66 100644 (file)
--- a/builtin/check-attr.c
+++ b/builtin/check-attr.c
@@ -68,6 +68,12 @@ static void check_attr_stdin_paths(int cnt, struct git_attr_check *check)
        strbuf_release(&nbuf);
 }
 
+static NORETURN void error_with_usage(const char *msg)
+{
+       error("%s", msg);
+       usage_with_options(check_attr_usage, check_attr_options);
+}
+
 int cmd_check_attr(int argc, const char **argv, const char *prefix)
 {
        struct git_attr_check *check;
@@ -103,8 +109,7 @@ int cmd_check_attr(int argc, const char **argv, const char *prefix)
        else if (stdin_paths && filei < argc)
                errstr = "Can't specify files with --stdin";
        if (errstr) {
-               error("%s", errstr);
-               usage_with_options(check_attr_usage, check_attr_options);
+               error_with_usage(errstr);
        }
 
        check = xcalloc(cnt, sizeof(*check));