On Mon, Aug 21, 2017 at 5:17 PM, xoviat <xov...@gmail.com> wrote: > Of course, to be frank, the principle failure with this plan is that > third-party tools (buildout, os packagers) will not be compliant with PEP > 517 even after it is adopted, and will then complain about having to update > their build systems. >
I don't understand this statement. If buildout needs to be compliant, it will be (eventually). I can imagine a future where everything is distributed with wheels and buildout wouldn't need to build anything. Jim > > 2017-08-21 16:05 GMT-05:00 xoviat <xov...@gmail.com>: > >> Previously, the attempt to move setuptools off of vendored dependencies >> failed because it was not done correctly: install_requires was set to the >> vendored dependencies but not setup_requires, which would have been >> required to correctly specify dependencies. However, setup_requires would >> have introduced circular dependencies that are impossible to correctly >> resolve, so that would have simply shifted an impossible problem onto pip. >> >> The principle issue then, is that setuptools requires setuptools to build >> itself. And although, this problem was previously not worth solving because >> of 'setup.py install', it is now not a difficult problem to solve if we >> rethink slightly what should be included in the setuptools respository: >> - Rather than re-generating egg_info on each setup.py invocation, we can >> cache dist-info in the setuptools respository. >> - We can implement a simple entry_points script that updates dist-info >> based on the contents of setup.py, which is only runnable of course after >> setuptools is installed >> - We can implement the reference build backend for setuptools: simply >> copy the files and dist-info into a new compliant zip archive >> >> Viola! Setuptools is no longer required to build setuptools, and the >> installation process is fully compliant with Python PEPs. >> > > > _______________________________________________ > Distutils-SIG maillist - Distutils-SIG@python.org > https://mail.python.org/mailman/listinfo/distutils-sig > > -- Jim Fulton http://jimfulton.info
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