[PATCH 10/15] rebase-interactive: use todo_list_transform() in edit_todo_list()

[Alban Gruin <alban.gruin@xxxxxxxxx>]

Just like complete_action(), edit_todo_list() used a
function (transform_todo_file()) that read the todo-list from the disk
and wrote it back, resulting in useless disk accesses.

This changes edit_todo_list() to call directly todo_list_transform()
instead.

Signed-off-by: Alban Gruin <alban.gruin@xxxxxxxxx>
---
 rebase-interactive.c | 40 +++++++++++++++++++---------------------
 1 file changed, 19 insertions(+), 21 deletions(-)

diff --git a/rebase-interactive.c b/rebase-interactive.c
index 7c7f720a3d..f42d48e192 100644
--- a/rebase-interactive.c
+++ b/rebase-interactive.c
@@ -78,39 +78,37 @@ void append_todo_help(unsigned edit_todo, unsigned keep_empty,
 
 int edit_todo_list(unsigned flags)
 {
-	struct strbuf buf = STRBUF_INIT;
 	const char *todo_file = rebase_path_todo();
+	struct todo_list todo_list = TODO_LIST_INIT;
+	int res = 0;
 
-	if (strbuf_read_file(&buf, todo_file, 0) < 0)
+	if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
 		return error_errno(_("could not read '%s'."), todo_file);
 
-	strbuf_stripspace(&buf, 1);
-	if (write_message(buf.buf, buf.len, todo_file, 0)) {
-		strbuf_release(&buf);
-		return -1;
-	}
-
-	strbuf_release(&buf);
+	strbuf_stripspace(&todo_list.buf, 1);
+	if (!todo_list_parse_insn_buffer(todo_list.buf.buf, &todo_list))
+		todo_list_transform(&todo_list, flags | TODO_LIST_SHORTEN_IDS);
 
-	transform_todo_file(flags | TODO_LIST_SHORTEN_IDS);
-
-	if (strbuf_read_file(&buf, todo_file, 0) < 0)
-		return error_errno(_("could not read '%s'."), todo_file);
+	append_todo_help(1, 0, &todo_list.buf);
 
-	append_todo_help(1, 0, &buf);
-	if (write_message(buf.buf, buf.len, todo_file, 0)) {
-		strbuf_release(&buf);
+	if (write_message(todo_list.buf.buf, todo_list.buf.len, todo_file, 0)) {
+		todo_list_release(&todo_list);
 		return -1;
 	}
 
-	strbuf_release(&buf);
-
-	if (launch_sequence_editor(todo_file, NULL, NULL))
+	strbuf_reset(&todo_list.buf);
+	if (launch_sequence_editor(todo_file, &todo_list.buf, NULL)) {
+		todo_list_release(&todo_list);
 		return -1;
+	}
 
-	transform_todo_file(flags & ~(TODO_LIST_SHORTEN_IDS));
+	if (!todo_list_parse_insn_buffer(todo_list.buf.buf, &todo_list)) {
+		todo_list_transform(&todo_list, flags & ~(TODO_LIST_SHORTEN_IDS));
+		res = write_message(todo_list.buf.buf, todo_list.buf.len, todo_file, 0);
+	}
 
-	return 0;
+	todo_list_release(&todo_list);
+	return res;
 }
 
 define_commit_slab(commit_seen, unsigned char);
-- 
2.19.1