[PATCH v4 23/28] trailer: add new helper functions to API

["Linus Arver via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Linus Arver <linusa@xxxxxxxxxx>

This is a preparatory refactor for deprecating "new_trailer_item" from
the API (which will let us deprecate
parse_trailers_from_command_line_args()).

Expose new helper functions from the API, because we'll be calling them
from interpret-trailers.c soon when we move
parse_trailers_from_command_line_args() there.

Move free_new_trailers() from the builtin to trailer.c because later on
we will adjust it to free arg_item structs, which are private to
trailer.c.

Signed-off-by: Linus Arver <linusa@xxxxxxxxxx>
---
 builtin/interpret-trailers.c | 12 ---------
 trailer.c                    | 49 ++++++++++++++++++++++++++++++++++++
 trailer.h                    |  8 ++++++
 3 files changed, 57 insertions(+), 12 deletions(-)

diff --git a/builtin/interpret-trailers.c b/builtin/interpret-trailers.c
index f674b5f4b9e..9169c320921 100644
--- a/builtin/interpret-trailers.c
+++ b/builtin/interpret-trailers.c
@@ -45,18 +45,6 @@ static int option_parse_if_missing(const struct option *opt,
 	return trailer_set_if_missing(opt->value, arg);
 }
 
-static void free_new_trailers(struct list_head *trailers)
-{
-	struct list_head *pos, *tmp;
-	struct new_trailer_item *item;
-
-	list_for_each_safe(pos, tmp, trailers) {
-		item = list_entry(pos, struct new_trailer_item, list);
-		list_del(pos);
-		free(item);
-	}
-}
-
 static int option_parse_trailer(const struct option *opt,
 				   const char *arg, int unset)
 {
diff --git a/trailer.c b/trailer.c
index 3b8f0ba103c..9b8cb94c021 100644
--- a/trailer.c
+++ b/trailer.c
@@ -66,6 +66,11 @@ static LIST_HEAD(conf_head);
 
 static char *separators = ":";
 
+const char *trailer_default_separators(void)
+{
+	return separators;
+}
+
 static int configured;
 
 #define TRAILER_ARG_STRING "$ARG"
@@ -424,6 +429,29 @@ int trailer_set_if_missing(enum trailer_if_missing *item, const char *value)
 	return 0;
 }
 
+void trailer_set_conf_where(enum trailer_where where,
+			    struct trailer_conf *conf)
+{
+	conf->where = where;
+}
+
+void trailer_set_conf_if_exists(enum trailer_if_exists if_exists,
+				struct trailer_conf *conf)
+{
+	conf->if_exists = if_exists;
+}
+
+void trailer_set_conf_if_missing(enum trailer_if_missing if_missing,
+				 struct trailer_conf *conf)
+{
+	conf->if_missing = if_missing;
+}
+
+struct trailer_conf *new_trailer_conf(void)
+{
+	 return xcalloc(1, sizeof(struct trailer_conf));
+}
+
 void duplicate_trailer_conf(struct trailer_conf *dst,
 			    const struct trailer_conf *src)
 {
@@ -434,6 +462,15 @@ void duplicate_trailer_conf(struct trailer_conf *dst,
 	dst->cmd = xstrdup_or_null(src->cmd);
 }
 
+void free_trailer_conf(struct trailer_conf *conf)
+{
+	free(conf->name);
+	free(conf->key);
+	free(conf->command);
+	free(conf->cmd);
+	free(conf);
+}
+
 static struct arg_item *get_conf_item(const char *name)
 {
 	struct list_head *pos;
@@ -1076,6 +1113,18 @@ void free_trailers(struct list_head *trailers)
 	}
 }
 
+void free_new_trailers(struct list_head *trailers)
+{
+	struct list_head *pos, *tmp;
+	struct new_trailer_item *item;
+
+	list_for_each_safe(pos, tmp, trailers) {
+		item = list_entry(pos, struct new_trailer_item, list);
+		list_del(pos);
+		free(item);
+	}
+}
+
 size_t trailer_block_start(struct trailer_block *trailer_block)
 {
 	return trailer_block->start;
diff --git a/trailer.h b/trailer.h
index f80f8f7e63f..a2569c10451 100644
--- a/trailer.h
+++ b/trailer.h
@@ -46,8 +46,14 @@ struct new_trailer_item {
 	enum trailer_if_missing if_missing;
 };
 
+void trailer_set_conf_where(enum trailer_where, struct trailer_conf *);
+void trailer_set_conf_if_exists(enum trailer_if_exists, struct trailer_conf *);
+void trailer_set_conf_if_missing(enum trailer_if_missing, struct trailer_conf *);
+
+struct trailer_conf *new_trailer_conf(void);
 void duplicate_trailer_conf(struct trailer_conf *dst,
 			    const struct trailer_conf *src);
+const char *trailer_default_separators(void);
 void trailer_add_arg_item(struct list_head *arg_head, char *tok, char *val,
 			  const struct trailer_conf *conf,
 			  const struct new_trailer_item *new_trailer_item);
@@ -98,6 +104,8 @@ void format_trailers(const struct process_trailer_options *,
 		     struct list_head *trailers,
 		     struct strbuf *out);
 void free_trailers(struct list_head *);
+void free_new_trailers(struct list_head *);
+void free_trailer_conf(struct trailer_conf *);
 
 /*
  * Convenience function to format the trailers from the commit msg "msg" into
-- 
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