Disclaimer: Pants newb. I'm interested in using pants to pull a zip of IntelliJ jars from JetBrains, unpack them, and use them as a jar_library. (Contrast with the Pants IntelliJ plugin which currently does all of this w/ a shell script, which gets the job done, but is less dog-foody.). I've got jar_library downloading their zip, then unpacked_jars getting the files I care about, but seems like the only places to go from here are: remote_sources (feels "right", but can't produce a jar_library), looking "under the covers" in ./.pants.d/unpack-jars/unpack-jars/, or writing a custom plugin/target/whatever.