Re: [PATCH 2/2] ci(check-whitespace): restrict to the intended commits

[Taylor Blau <me@ttaylorr.com>]

On Wed, Jul 14, 2021 at 03:25:15PM -0700, Junio C Hamano wrote:
> "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
> writes:
>
> > Unfortunately, this means that we no longer can rely on a shallow clone:
> > There is no way of knowing just how many commits the upstream branch
> > advanced after the commit from which the PR branch branched off. So
> > let's just go with a full clone instead, and be safe rather than sorry
> > (if we have "too shallow" a situation, a commit range `@{u}..` may very
> > well include a shallow commit itself, and the output of `git show
> > --check <shallow>` is _not_ pretty).
>
> Makes sense.
>
> As long as you have pull-request base, I suspect that you could
> shallow clone the base and incrementally fetch the rest to update,
> perhaps?  But I do not know if it is worth doing so for a small
> project like ours.

Agreed, and...

> >      - uses: actions/checkout@v2
> >        with:
> > -        fetch-depth: ${{ env.COMMIT_DEPTH }}
> > +        fetch-depth: 0

...I wondered whether "fetch-depth: 0" was the default and whether or
not this hunk could have just removed "fetch-depth" entirely. But the
default is "1", and "0" means "fetch everything". So we really do need
it.

Thanks,
Taylor