Hi. I have a question about pants and Scala. We want to remove unused dependencies from our BUILD files to speed-up builds. We're using Scala and planning to use strict deps. I don't see anything which helps with this in Pants options, but maybe I miss something or there's a tool which already does this? The closest thing is "pants dep-usage", but it's not exactly what we need. Or, maybe, there's a tool which can construct BUILD files by analyzing .scala + .java files in a directory? If there are no such tools, what do you think is the best approach to build such a tool? Maybe we can use some info which pants already provides?

dep-usage

would be the recommended tool, yea.

I see, looks like we can almost safely remove dependencies marked with

"dependency_type": "unused"

and check those with small

products_used_ratio

. All we need is just simple too to sort/filter JSON - which is quite easy to implement. Thanks, I somehow missed

--no-summary

flag and it's exactly what we need.

Yep: "almost safely" is the key, heh. There will be false positives.

https://github.com/foursquare/fsqio/tree/master/src/python/fsqio/pants/buildgen can construct BUILD files based on your Scala files. i can’t recall if it supports Java. i used it at foursquare in a past life and we’ve been using it with no issues at my current company

@eager-raincoat-57702: nice! we've had plans for a while to bake that in via https://github.com/pantsbuild/pants/issues/6449 , and the time is almost nigh

awesome

yeah nice, if this allows dropping archaic buildgen plugins that we support + adding our webapp to use pants methods in order to automatically detect via dependency tree which checks/tests we should run that’d be awesome!

very exciting 😃