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

diff --git a/trailer.c b/trailer.c
index 83225c6828b30d893a641142c8c7c2684ac4f6a4..847417ef89906694aaa3b27809d2a50b6afef789 100644 (file)
--- a/trailer.c
+++ b/trailer.c
@@ -976,7 +976,6 @@ void process_trailers(const char *file,
                      struct string_list *trailers)
 {
        LIST_HEAD(head);
-       LIST_HEAD(arg_head);
        struct strbuf sb = STRBUF_INIT;
        int trailer_end;
        FILE *outfile = stdout;
@@ -991,9 +990,11 @@ void process_trailers(const char *file,
        /* Print the lines before the trailers */
        trailer_end = process_input_file(outfile, sb.buf, &head, opts);
 
-       process_command_line_args(&arg_head, trailers);
-
-       process_trailers_lists(&head, &arg_head);
+       if (!opts->only_input) {
+               LIST_HEAD(arg_head);
+               process_command_line_args(&arg_head, trailers);
+               process_trailers_lists(&head, &arg_head);
+       }
 
        print_all(outfile, &head, opts);