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The honest motivation for this little refactoring is https://github.com/google/crubit. In build rules that don't yet work in the open-source yet we need to patch
rust.bzl
with a custom logic encapsulated in a function (the function collects extra dependencies from aspects). This function is called fromrust.bzl
, and it needs to callcrate_root_src
. To prevent aload
cycle I'm moving the function toutils.bzl
. I understand that it would be much better to justify this PR with a working build rules in Crubit, but that's unfortunately not easily achievable yet.