[Distutils] free project idea

[Ronny Pfannschmidt]

my suggestion would be provide a whl_setup.py that works in a fashion
similar to the current ez_setup

however instead of using easy_install + eggs, it would use pip install
--target into a folder relative to the setup.py that invoked it
if there was a mechanism to prevent pip from invoking setup.py with its
stub, that system could even be used to install  more recent setuptools
itself into the "setup site"

a setup.py would then just use whl_setup to get at setuptools, and as a
nice extra, it could hijack the install_requirements method of a
distrbution,
so pip would be used to install the requirements into the "setup site"
as well

that way we could get rid of the need for eggs to make setup_requires
nice, and could just have pip deal with all the details

in addition it could bail out on too old pip (after all it needs a
properly working install target support to provide the "setup site" with
packages, and a even newer pip version should the stub-disabling be
implemented)

-- Ronny

On 10/21/2015 08:35 PM, Daniel Holth wrote:
> Take this setup.py that implements setup requirements (requirements
> needed for setup.py itself to run)
> https://bitbucket.org/dholth/setup-requires/src/tip/setup.py
>
> Require your new build system using that mechanism, by mentioning it
> in setup.cfg
>
> Then instead of calling setup() from setuptools at the bottom, emulate
> the setup.py build system interface documented
> at http://pip.readthedocs.org/en/stable/reference/pip_install/#build-system-interface to
> invoke new build system. Check to make sure whether pip accepts
> .dist-info when calling the egg_info command.
>
> Then write a command for new build system that adds the shim setup.py
> to an sdist.
>
> Now you have a setup.py that can download and install new-build-system
> and interoperate with pip, without having to change pip at all.
>
>
> _______________________________________________
> Distutils-SIG maillist  -  Distutils-SIG at python.org
> https://mail.python.org/mailman/listinfo/distutils-sig

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