[RFC PATCH 5/9] sequencer: move the code writing total_nr on the disk to a new function

[Alban Gruin]

The total amount of commands can be used to show the progression of the
rebasing in a shell.  This number is written to the disk by
read_populate_todo() when the todo list is loaded from
sequencer_continue() or pick_commits(), but not by complete_action(),
which releases its todo list before calling sequencer_continue(), which
reloads it immediatly afterwards.

To avoid to reload the todo list from the disk, sequencer_continue()
will be modified to accept a todo list, and if it is not null,
read_populate_todo() will not be called.

This moves the part writing total_nr to a new function so it can be
called by complete_action().

Signed-off-by: Alban Gruin <alban.gr...@gmail.com>
---
 sequencer.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/sequencer.c b/sequencer.c
index ec9c3d4dc5..d66b80d49f 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2343,6 +2343,16 @@ void sequencer_post_commit_cleanup(struct repository *r, 
int verbose)
        sequencer_remove_state(&opts);
 }
 
+static void todo_list_write_total_nr(struct todo_list *todo_list)
+{
+       FILE *f = fopen_or_warn(rebase_path_msgtotal(), "w");
+
+       if (f) {
+               fprintf(f, "%d\n", todo_list->total_nr);
+               fclose(f);
+       }
+}
+
 static int read_populate_todo(struct repository *r,
                              struct todo_list *todo_list,
                              struct replay_opts *opts)
@@ -2388,7 +2398,6 @@ static int read_populate_todo(struct repository *r,
 
        if (is_rebase_i(opts)) {
                struct todo_list done = TODO_LIST_INIT;
-               FILE *f = fopen_or_warn(rebase_path_msgtotal(), "w");
 
                if (strbuf_read_file(&done.buf, rebase_path_done(), 0) > 0 &&
                    !todo_list_parse_insn_buffer(r, done.buf.buf, &done))
@@ -2400,10 +2409,7 @@ static int read_populate_todo(struct repository *r,
                        + count_commands(todo_list);
                todo_list_release(&done);
 
-               if (f) {
-                       fprintf(f, "%d\n", todo_list->total_nr);
-                       fclose(f);
-               }
+               todo_list_write_total_nr(todo_list);
        }
 
        return 0;
-- 
2.22.0