Add --no-build-isolation so check-manifest can succeed without an internet connection

[asottile]

this is a bit of a proof-of-concept I wanted to float before committing more to this

the reason I wanted to try and tackle this is @graingert wanted to use check-manifest in https://pre-commit.ci (which forbids network at runtime for free tier because I'd rather not deal with abuse for free 😄)

with this dockerfile:

FROM ubuntu:focal
RUN : \
    && apt-get update \
    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
        git \
        ca-certificates \
        python3-venv \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*
RUN git clone https://github.com/twisted/ldaptor
COPY . /code
RUN python3 -m venv /venv && /venv/bin/pip install /code wheel

I'm able to get ldaptor passing:

$ docker run --rm -ti --net=none --workdir /ldaptor foo /venv/bin/check-manifest --no-build-isolation
lists of files in version control and sdist match

[gaborbernat]

[mgedmin]

LGTM!

Would you like to add a changelog note for this change? I think it's also worth mentioning (separately from the new command-line argument) about the switch from the deprecated pep517.build to python-build (I hope I got the project name right; I know the package is just build on pypi but it's very generic and ungooglable).

[asottile]

cool! I also added a little blurb / example as well to the pre-commit documentation

[mgedmin]

Thank you! check-manifest 0.45 is released now.