docs: document the is_python config settings #2336
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| If you need to match a version that isn't present, you can manually define | ||
| a `config_setting` and have it match `python_version` or | ||
| `python_version_major_minor`. |
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New versions can be added via python.single_override, so it would be best to do that instead and then the config setting values will be updated. I think we should call out that for bzlmod this is only needed if users are configuring/registering their own toolchains.
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I updated the text to mention both options. The main case I have in mind is for non-root modules: they may want to define their own to insulate themselves from what a root module might do. The other main case is for unreleased versions or, yes, customized toolchains.
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Not sure if this is still needed given #2350. |
…o doc.is.python.config.settings
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Yeah, that PR will take care of most of the problem.
I think the doc is still necessary, though, since (1) the root module can cause targets to disappear, (2) we know people customize TOOL_VERSIONS, and (3) eventually we'll drop some of the very old python versions in our own versions file (or otherwise make them more of an opt-in type of thing).
| If you need to match a version that isn't present, you can manually define | ||
| a `config_setting` and have it match `python_version` or | ||
| `python_version_major_minor`. |
There was a problem hiding this comment.
I updated the text to mention both options. The main case I have in mind is for non-root modules: they may want to define their own to insulate themselves from what a root module might do. The other main case is for unreleased versions or, yes, customized toolchains.
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This documents the
//python/config_settings:is_python_*config settings. It adds a disclaimerthat the available targets may vary depending on the root module settings, and tells users
how to match versions when one isn't available.