We currently have a bunch of bash files in our CI pipeline that get the list of targets to build (using

list, dependees, minimize, filter

). Is there a way to write a pants plugin that invokes these goals?

To clarify, you invoke several Pants commands and you'd prefer to have one custom command that does the same work?

yes, right now we do this:

local changed
  changed=($(./pants ${changed_parent} list))
  if [[ -z $changed ]]; then
    return 0
  fi

  local dependees
  dependees=($(./pants dependees --dependees-transitive --dependees-closed "${changed[@]}"))
  local minimized
  minimized=($(./pants minimize "${dependees[@]}"))

  local changed_targets
  changed_targets=($(./pants filter ${filter} "${minimized[@]}"))

  echo "Got changed targets ${changed_targets[@]}" "${TARGETS[@]}"
  TARGETS=("${changed_targets[@]}" "${TARGETS[@]}")

But bash syntax is clunky and we would like to add some more logic that would be easier to write in python. We would rather do

./pants run-ci-pipeline --step test

that would run the needed steps to calculate the targets and run tests against them

Yep, that should absolutely be possible with a custom goal. What version of Pants are you on, and what languages are you targeting?

we are on 1.29.0 and build scala projects

OK, so you need the plugin API for the v1 engine, not the one for the new v2 engine (which doesn't have Scala support yet).