Re: [RFC PATCH] rebisect: add script for easier bisect log editing

[Christian Couder <christian.couder@gmail.com>]

On Wed, Nov 8, 2017 at 2:59 PM, Adam Dinwoodie <adam@dinwoodie.org> wrote:
> Add a short script, vaguely inspired by `git rebase --interactive`, to
> ease the process described in the `git bisect` documentation of saving
> off a bisect log, editing it, then replaying it.

Nice idea.

> Signed-off-by: Adam Dinwoodie <adam@dinwoodie.org>
> ---
>
> When I'm bisecting, I find I need to semi-regularly go back and change
> my good/bad/skip response for some commits.  The bisect documentation
> describes doing this by saving `git bisect log` output, editing it, then
> using `git bisect replay`.  Which is a perfectly fine technique, but
> automation is A Good Thing(TM).  The below script is a short proof of
> concept for changing this process to be a single command.
>
> Ideally (at least from my perspective), this function would be rolled
> into the main `git bisect` tool, as `git bisect edit` or similar.

I agree and I don't think it would be very difficult to convert to
such a sub command.

> Before I start working on that, however, I wanted to see what the list
> thought of the idea.
>
>  contrib/git-rebisect.sh | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>  create mode 100755 contrib/git-rebisect.sh
>
> diff --git a/contrib/git-rebisect.sh b/contrib/git-rebisect.sh
> new file mode 100755
> index 000000000..60f20b278
> --- /dev/null
> +++ b/contrib/git-rebisect.sh
> @@ -0,0 +1,12 @@
> +#!/bin/sh
> +
> +GIT_EDITOR="$(git var GIT_EDITOR)"
> +GIT_DIR="$(git rev-parse --git-dir)"
> +GIT_BISECT_LOG_TMP="${GIT_DIR}/BISECT_LOG_EDIT"
> +
> +git bisect log >"$GIT_BISECT_LOG_TMP"
> +"$GIT_EDITOR" "$GIT_BISECT_LOG_TMP"
> +git bisect reset HEAD

I guess that using "reset HEAD" could be cheaper than just "reset" and
that's the reason you are using it.

> +git bisect start

Are you sure that this "start" is necessary? The doc says that "reset"
followed by "replay that-file" should be enough.

> +git bisect replay "$GIT_BISECT_LOG_TMP"
> +rm -f "$GIT_BISECT_LOG_TMP"

Thanks,
Christian.