Re: [PATCH 3/6] fetch: control lifecycle of FETCH_HEAD in a single place

[Christian Couder <christian.couder@xxxxxxxxx>]

On Sat, Feb 12, 2022 at 5:49 PM Patrick Steinhardt <ps@xxxxxx> wrote:
>
> There are two different locations where we're appending to FETCH_HEAD:
> first when storing updated references, and second when backfilling tags.
> Both times we open the file, append to it and then commit it into place,
> which is essentially duplicate work.
>
> Improve the lifecycle of updating FETCH_HEAD by opening and committing
> it once in `do_fetch()`, where we pass the structure down to code which

s/down to code/down to the code/

> wants to append to it.

> @@ -1601,6 +1596,10 @@ static int do_fetch(struct transport *transport,
>         if (!update_head_ok)
>                 check_not_current_branch(ref_map, worktrees);
>
> +       retcode = open_fetch_head(&fetch_head);
> +       if (retcode)
> +               goto cleanup;
> +
>         if (tags == TAGS_DEFAULT && autotags)
>                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
>         if (prune) {
> @@ -1617,7 +1616,8 @@ static int do_fetch(struct transport *transport,
>                                    transport->url);
>                 }
>         }
> -       if (fetch_and_consume_refs(transport, ref_map, worktrees)) {
> +
> +       if (fetch_and_consume_refs(transport, ref_map, &fetch_head, worktrees)) {
>                 retcode = 1;
>                 goto cleanup;
>         }

I think the following (if it works) would be more consistent with
what's done for open_fetch_head() above:

retcode = fetch_and_consume_refs(transport, ref_map, &fetch_head, worktrees)
if (retcode)
      goto cleanup;