docs: provide example how to convert target addresses to source files in rules API #20524
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A plugin may need to output a list of resources (e.g. source code files) so that it can be fed to another program (outside of Pants). Pants operates on targets, and they can won't be understood by anything outside of Pants.
E.g.
some/config/folder/example1.cfg:../config
would need to be trimmed to map to a file. This is similar to whatfiledeps
goal would do, but without including BUILD files which are often irrelevant.This snippet shows how this is done.