Re: [PATCH v2 1/1] status: be prepared for not-yet-started interactive rebase

> Some developers might want to call `git status` in a working
> directory where they just started an interactive rebase, but the
> edit script is still opened in the editor.
>
> Let's show a meaningful message in such cases.
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
>  t/t7512-status-help.sh | 19 +++++++++++++++++++
>  wt-status.c            | 14 ++++++++++----
>  2 files changed, 29 insertions(+), 4 deletions(-)
>
> diff --git a/t/t7512-status-help.sh b/t/t7512-status-help.sh
> index 5c3db656df..458608cc1e 100755
> --- a/t/t7512-status-help.sh
> +++ b/t/t7512-status-help.sh
> @@ -944,4 +944,23 @@ EOF
>         test_i18ncmp expected actual
>  '
>
> +test_expect_success 'status: handle not-yet-started rebase -i gracefully' '
> +       ONTO=$(git rev-parse --short HEAD^) &&
> +       COMMIT=$(git rev-parse --short HEAD) &&
> +       EDITOR="git status --untracked-files=no >actual" git rebase -i HEAD^ &&
> +       cat >expected <<EOF &&
> +On branch several_commits
> +No commands done.
> +Next command to do (1 remaining command):
> +   pick $COMMIT four_commit
> +  (use "git rebase --edit-todo" to view and edit)
> +You are currently editing a commit while rebasing branch '\''several_commits'\'' on '\''$ONTO'\''.
> +  (use "git commit --amend" to amend the current commit)
> +  (use "git rebase --continue" once you are satisfied with your changes)
> +
> +nothing to commit (use -u to show untracked files)
> +EOF
> +       test_i18ncmp expected actual
> +'
> +
>  test_done
> diff --git a/wt-status.c b/wt-status.c
> index a715e71906..4dff0b3e21 100644
> --- a/wt-status.c
> +++ b/wt-status.c
> @@ -1135,14 +1135,17 @@ static void abbrev_sha1_in_line(struct strbuf *line)
>         strbuf_list_free(split);
>  }
>
> -static void read_rebase_todolist(const char *fname, struct string_list *lines)
> +static int read_rebase_todolist(const char *fname, struct string_list *lines)
>  {
>         struct strbuf line = STRBUF_INIT;
>         FILE *f = fopen(git_path("%s", fname), "r");
>
> -       if (!f)
> +       if (!f) {
> +               if (errno == ENOENT)
> +                       return -1;
>                 die_errno("Could not open file %s for reading",
>                           git_path("%s", fname));