Hey yall. Is there a way to get the address of the caller in a macro?

Like the BUILD file path? The caller doesn't have an address

Yes like the BUILD file path

There is not in the current macro system, but it's feasible to add I think. Would need a design for how the user accesses the symbol - probably with a top-level symbol like

buildroot()

? Mind sharing the motivation?

Ah yes. At a high-level, the motivation is to provide clean packaging macros, reduce boilerplate, and practice DRY Here is a concrete use case. Say I want to package a spark job into a PEX. But at the same time, I need to define a YAML file to let another system know that there is a new job PEX. (The YAML would also contain a bunch of additional configs). My build file look something like

spark_job(
    name="job",
    source="entrypoint.py",
    pex_name="path.to.src.python.my.job.pex",
    cluster_config={...},
    ...
)

Currently I need to specify the pex_name because other wise the job submit system won't know where to find the PEX. With a

buildroot()

, I can easily generate the

pex_name

in my macro