Cut all dependencies on bash [duplicate of #4319]

[lberki]

This will be a "death of a thousand cuts" kind of thing, because we probably use tiny little shell scripts all over the place.

[davidzchen]

What exactly is the scope of this? Is it mostly limited to non-test code? Will we have a separate set of shell tests on Windows that run on either powershell or cmd.exe?

Also, what are the implications of Windows support on the sh_* rules?

[lberki]

Yes :)

We haven't really figured out yet what we'll do about this. My hunch is that sh_* rules will stay the same, and they will simply not work on Windows for the time being.

[johnynek]

why not just ship a bash as part of bazel that can be used on windows and consider bash to be part of the standard tools? There seem to be a few possibilities.

It would be really nice if skylark rules can assume a working bash and a minimal set of tools (unzip, find, zip, ...)

[laszlocsomor]

I envision Bash support via a local repository.
Also I'd like Bazel to depend on Bash only if you try to build sh_* rules (or depend on labels under the make-believe @local_sh_config// repo).

[laszlocsomor]

Duplicate of #4319