[PATCH 56/76] diff.c: convert --submodule

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 diff.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/diff.c b/diff.c
index bf7d2afcce..4d3eababe3 100644
--- a/diff.c
+++ b/diff.c
@@ -4725,14 +4725,6 @@ static int parse_dirstat_opt(struct diff_options 
*options, const char *params)
        return 1;
 }
 
-static int parse_submodule_opt(struct diff_options *options, const char *value)
-{
-       if (parse_submodule_params(options, value))
-               die(_("Failed to parse --submodule option parameter: '%s'"),
-                       value);
-       return 1;
-}
-
 static const char diff_status_letters[] = {
        DIFF_STATUS_ADDED,
        DIFF_STATUS_COPIED,
@@ -5079,6 +5071,20 @@ static int diff_opt_relative(const struct option *opt,
        return 0;
 }
 
+static int diff_opt_submodule(const struct option *opt,
+                             const char *arg, int unset)
+{
+       struct diff_options *options = opt->value;
+
+       BUG_ON_OPT_NEG(unset);
+       if (!arg)
+               arg = "log";
+       if (parse_submodule_params(options, arg))
+               return error(_("failed to parse --submodule option parameter: 
'%s'"),
+                            arg);
+       return 0;
+}
+
 static int diff_opt_textconv(const struct option *opt,
                             const char *arg, int unset)
 {
@@ -5342,6 +5348,10 @@ static void prep_parse_options(struct diff_options 
*options)
                               N_("ignore changes to submodules in the diff 
generation"),
                               PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
                               diff_opt_ignore_submodules),
+               OPT_CALLBACK_F(0, "submodule", options, N_("<format>"),
+                              N_("specify how differences in submodules are 
shown"),
+                              PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
+                              diff_opt_submodule),
                { OPTION_CALLBACK, 0, "output", options, N_("<file>"),
                  N_("Output to a specific file"),
                  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5391,9 +5401,7 @@ int diff_opt_parse(struct diff_options *options,
                if (cm & COLOR_MOVED_WS_ERROR)
                        return -1;
                options->color_moved_ws_handling = cm;
-       } else if (skip_to_optional_arg_default(arg, "--submodule", &arg, 
"log"))
-               return parse_submodule_opt(options, arg);
-       else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
+       } else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
                return parse_ws_error_highlight_opt(options, arg);
        else if (!strcmp(arg, "--ita-invisible-in-index"))
                options->ita_invisible_in_index = 1;
-- 
2.20.0.482.g66447595a7