Re: [PATCH v2] bisect: fix "reset" when branch is checked out elsewhere

[Eric Sunshine <sunshine@sunshineco.com>]

On Sat, Feb 4, 2023 at 6:02 PM Rubén Justo <rjusto@gmail.com> wrote:
> Since 1d0fa89 (checkout: add --ignore-other-wortrees, 2015-01-03) we
> have a safety valve in checkout/switch to prevent the same branch from
> being checked out simultaneously in multiple worktrees.
>
> If a branch is bisected in a worktree while also being checked out in
> another worktree; when the bisection is finished, checking out the
> branch back in the current worktree may fail.
>
> Let's teach bisect to use the "--ignore-other-worktrees" flag.
>
> Signed-off-by: Rubén Justo <rjusto@gmail.com>
> ---
> diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
> @@ -122,6 +122,29 @@ test_expect_success 'bisect start without -- takes unknown arg as pathspec' '
> +test_expect_success 'bisect reset: back in a branch checked out also elsewhere' '
> +       echo "shared" > branch.expect &&
> +       test_bisect_reset() {
> +               git -C $1 bisect start &&
> +               git -C $1 bisect good $HASH1 &&
> +               git -C $1 bisect bad $HASH3 &&
> +               git -C $1 bisect reset &&
> +               git -C $1 branch --show-current > branch.output &&
> +               cmp branch.expect branch.output
> +       } &&
> +       test_when_finished "
> +               git worktree remove wt1 &&
> +               git worktree remove wt2 &&
> +               git branch -d shared
> +       " &&

As mentioned in my review[1] of one of your other patches, &&-chaining
within the argument to test_when_finished() is probably undesirable in
this case since failure of any cleanup command would cause
test_when_finish() to fail, which would cause the test to fail
overall.

[1]: https://lore.kernel.org/git/CAPig+cQpizjmhmDKb=HPrcYqqRq7JpvC-NZvY7B9eBbG+NrfKw@mail.gmail.com/

> +       git worktree add wt1 -b shared &&
> +       git worktree add wt2 -f shared &&
> +       # we test in both worktrees to ensure that works
> +       # as expected with "first" and "next" worktrees
> +       test_bisect_reset wt1 &&
> +       test_bisect_reset wt2
> +'