fix: Disable python codegen support by default

[tpasternak]

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Description of this change

[tpasternak]

@agluszak

[FrankPortman]

I happened to see this PR when browsing this repo and this change looks potentially significant to me as I have macros/rules that generate PyInfo/files -> py_library in my codebase. Is there any documentation for this change?

[andponlin-canva]

I happened to see this PR when browsing this repo and this change looks potentially significant to me as I have macros/rules that generate PyInfo/files -> py_library in my codebase. Is there any documentation for this change?

Hello @FrankPortman ; I added some comments here which also includes an example.

[FrankPortman]

Thanks - if my understanding is correct then this flag and tag are required to make IntelliJ properly detect and remove the "red squiggle" from codegenned files. But my basic usage of both macros and rules to code generate Python files has not had issues with IntelliJ as of now. Is this change a general safety net or only needed if you intend to output directories rather than marking individual files?

[andponlin-canva]

Yes the flag and tag will be required to make this work fully. The intention is to remove the "red squiggle" (see here) and to allow code-complete on generated code. The example project demonstrates Python code-generation not working previously for the case of a directory and the case of straight files outputs.

[andponlin-canva]

But my basic usage of both macros and rules to code generate Python files has not had issues with IntelliJ as of now

@FrankPortman ; If I understand you correctly, you are facading your Rules' files-based (no directory) output with a py_library which is working for you in Intelli-J? This change presumes that you might be using the Rule directly and the Rule has the option of having directory-based outputs. This may be the two differences from the approach that you have.