Provide a CLI

[flying-sheep]

As mentioned in #1 and the description, it would be useful to have a CLI. (Creating this so people can get notified)

My use case for this project is to replace the way Linux distribution packages are packaged. As Thomas said in https://github.com/pradyunsg/installer/issues/1#issuecomment-622970860, people currently use error prone command lines like this:

python -m pip install --root $RPM_BUILD_ROOT --no-deps --disable-pip-version-check --progress-bar off --verbose --ignore-installed --no-warn-script-location pyproject-wheeldir/*.whl

Would be great to have a very simple command line that does exactly that: Given a

• Python binary with version $pythonver,
• $root directory, and
• wheel file

it installs the

• package and dist info to $root/usr/lib/python$pythonver/site-packages/,
• headers to $root/usr/include/,
• scripts to $root/usr/bin/, and
• data to $root (I assume)

[pradyunsg]

I'm gonna move the whole conversation about destdir to #58, and hide all the comments related to it here as off-topic.

[FFY00]

One other desirable feature would be dependency checking. https://github.com/pypa/build provides a function for this, if you want to use it.

https://github.com/pypa/build/blob/9258bccd200bf02ff101abde5f8d39d0e88cc621/src/build/__init__.py#L84

[pradyunsg]

This is done, with #94.

[flying-sheep]

Yay! This is so beautiful. I couldn’t wait and made a git package to try it out: https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=python-installer-git

An Arch PKGBUILD for a Python package can very soon look like:

pypiname=...
pkgname=python-$pypiname
pkgver=...
[…]
makedepends=(python-build python-installer)  # nothing more

build() {
	cd "$srcdir/$pypiname-$pkgver"
	python -m build -w
}

package() {
	cd "$srcdir/$pypiname-$pkgver"
	python -m installer -d "$pkgdir" "dist/$pypiname-$pkgver-py3-none-any.whl"
}