interpret-trailers: add an option to show only existing trailers

diff --git a/builtin/interpret-trailers.c b/builtin/interpret-trailers.c
index afb12c11bc9966c7786f6602e3940ea0ffaa39be..2d90e0e4808144e3fcc016b0f6a9366b6ab66a8d 100644 (file)
--- a/builtin/interpret-trailers.c
+++ b/builtin/interpret-trailers.c
@@ -25,6 +25,7 @@ int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
                OPT_BOOL(0, "in-place", &opts.in_place, N_("edit files in place")),
                OPT_BOOL(0, "trim-empty", &opts.trim_empty, N_("trim empty trailers")),
                OPT_BOOL(0, "only-trailers", &opts.only_trailers, N_("output only the trailers")),
+               OPT_BOOL(0, "only-input", &opts.only_input, N_("do not apply config rules")),
                OPT_STRING_LIST(0, "trailer", &trailers, N_("trailer"),
                                N_("trailer(s) to add")),
                OPT_END()
@@ -33,6 +34,12 @@ int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
        argc = parse_options(argc, argv, prefix, options,
                             git_interpret_trailers_usage, 0);
 
+       if (opts.only_input && trailers.nr)
+               usage_msg_opt(
+                       _("--trailer with --only-input does not make sense"),
+                       git_interpret_trailers_usage,
+                       options);
+
        if (argc) {
                int i;
                for (i = 0; i < argc; i++)