trailer: pass process_trailer_opts to trailer_info_get()

Most of the trailer code has an "opts" struct which is
filled in by the caller. We don't pass it down to
trailer_info_get(), which does the initial parsing, because
there hasn't yet been a need to do so.

Let's start passing it down in preparation for adding new
options. Note that there's a single caller which doesn't
otherwise have such an options struct. Since it's just one
caller (that we'd have to modify anyway), let's not bother
with any special treatment like accepting a NULL options
struct, and just have it allocate one with the defaults.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sequencer.c

@@ -224,11 +224,12 @@ static const char *get_todo_path(const struct replay_opts *opts)
 static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob,
 	int ignore_footer)
 {
+	struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
 	struct trailer_info info;
 	size_t i;
 	int found_sob = 0, found_sob_last = 0;
 
-	trailer_info_get(&info, sb->buf);
+	trailer_info_get(&info, sb->buf, &opts);
 
 	if (info.trailer_start == info.trailer_end)
 		return 0;

trailer.c

@@ -950,7 +950,7 @@ static size_t process_input_file(FILE *outfile,
 	struct strbuf val = STRBUF_INIT;
 	size_t i;
 
-	trailer_info_get(&info, str);
+	trailer_info_get(&info, str, opts);
 
 	/* Print lines before the trailers as is */
 	if (!opts->only_trailers)
@@ -1067,7 +1067,8 @@ void process_trailers(const char *file,
 	strbuf_release(&sb);
 }
 
-void trailer_info_get(struct trailer_info *info, const char *str)
+void trailer_info_get(struct trailer_info *info, const char *str,
+		      const struct process_trailer_options *opts)
 {
 	int patch_start, trailer_end, trailer_start;
 	struct strbuf **trailer_lines, **ptr;
@@ -1159,7 +1160,7 @@ void format_trailers_from_commit(struct strbuf *out, const char *msg,
 {
 	struct trailer_info info;
 
-	trailer_info_get(&info, msg);
+	trailer_info_get(&info, msg, opts);
 	format_trailer_info(out, &info, opts);
 	trailer_info_release(&info);
 }

trailer.h

@@ -77,7 +77,8 @@ void process_trailers(const char *file,
 		      const struct process_trailer_options *opts,
 		      struct list_head *new_trailer_head);
 
-void trailer_info_get(struct trailer_info *info, const char *str);
+void trailer_info_get(struct trailer_info *info, const char *str,
+		      const struct process_trailer_options *opts);
 
 void trailer_info_release(struct trailer_info *info);