diff-parseopt: convert --relative

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index d423a06b41b1c3bf362ea7601df80ed9dea1a102..b9c267a19977061ebeaf0678fd219247e02bbb9b 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -4960,6 +4960,18 @@ static enum parse_opt_result diff_opt_output(struct parse_opt_ctx_t *ctx,
        return 0;
 }
 
+static int diff_opt_relative(const struct option *opt,
+                            const char *arg, int unset)
+{
+       struct diff_options *options = opt->value;
+
+       BUG_ON_OPT_NEG(unset);
+       options->flags.relative_name = 1;
+       if (arg)
+               options->prefix = arg;
+       return 0;
+}
+
 static int diff_opt_unified(const struct option *opt,
                            const char *arg, int unset)
 {
@@ -5094,6 +5106,10 @@ static void prep_parse_options(struct diff_options *options)
                         N_("use empty blobs as rename source")),
 
                OPT_GROUP(N_("Diff other options")),
+               OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
+                              N_("when run from subdir, exclude changes outside and show relative paths"),
+                              PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
+                              diff_opt_relative),
                { OPTION_CALLBACK, 0, "output", options, N_("<file>"),
                  N_("Output to a specific file"),
                  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5125,15 +5141,8 @@ int diff_opt_parse(struct diff_options *options,
        if (ac)
                return ac;
 
-       /* renames options */
-       if (skip_to_optional_arg_default(arg, "--relative", &arg, NULL)) {
-               options->flags.relative_name = 1;
-               if (arg)
-                       options->prefix = arg;
-       }
-
        /* xdiff options */
-       else if (!strcmp(arg, "--minimal"))
+       if (!strcmp(arg, "--minimal"))
                DIFF_XDL_SET(options, NEED_MINIMAL);
        else if (!strcmp(arg, "--no-minimal"))
                DIFF_XDL_CLR(options, NEED_MINIMAL);