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Hi, |
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I'd like to share my frustration at the state of Python in general, |
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and Python packages in Gentoo. So I'd like to 'bootstrap' python3_8 -- |
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that is, add it to the most common dependency, dev-python/setuptools. |
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Simple thing, right? |
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1. There's no such thing as trivial dependency graph in Python. If you |
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think that setuptools has a few deps, you're entirely wrong. I actually |
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had to write a tool to even assemble list of deps to start with, |
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and the number is: 174. I mean, in order to enable py3.8 on setuptools, |
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you have to enable it on at least 173 other packages. |
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Sure, some of those packages are just doc-deps or test-deps, and some |
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could be avoided one way or another. However, avoiding them is only |
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temporary and involves more effort than it saves. |
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2. There are some packages that dropped Python 2.7 but still have 2.7 |
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deps. So we need to also add py3.8 to older versions that still has |
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2.7. Plus, some packages have explicit <-deps. So we need to add 3.8 |
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to them, and hope that the old version will actually work with 3.8, |
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and then to their extra dependencies. |
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This is all handiwork. The number is now 178 packages, or 187 ebuilds. |
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3. Of course there are packages with new deps dropping keywords whose |
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maintainers (or bumpers) never bothered filing a keywordreq. Because |
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why bother, somebody else will do that when it blocks everything, |
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right?! |
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Well, guess what. python3_8 flag is going to be masked on non-amd64 |
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because people didn't bother keywording new versions of their packages |
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on other arches. |
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If you choose to realize your mistake now, and are willing to fix it, |
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start keywording new versions. |
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Here's the initial CI run: |
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https://github.com/gentoo/gentoo/pull/13638 |
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The packages haven't been tested yet. If you want to help, feel free to |
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apply it locally, and run tests in all those packages, and try to |
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assemble a reasonably readable report of what fails. Then probably diff |
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the failures against py3.7 because some packages probably fail there |
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as well. |
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Of course many of those packages don't have tests at all. Because it |
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was too much effort, and the four-letter company didn't pay for them. |
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Because it was too hard to use GitHub snapshot over pypi tarball that |
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doesn't bundle tests because obviously nobody wants them. Help with |
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that welcome too. |
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Help with getting rid of py2 revdeps of py3-only packages would be very |
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welcome too. |
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In other words, there's a lot of work to get Python near-sane in Gentoo, |
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and we'd welcome all the help we can get. TIA. |
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|
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-- |
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Best regards, |
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Michał Górny |
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