#!/usr/bin/bash -eux
RPMDIR=$(rpm --eval '%_topdir')/RPMS/noarch
RPMPKG="${RPMDIR}/isort-5.7.0-0.noarch.rpm"

mkdir -p $(rpm --eval '%_topdir')/SOURCES/

spectool -g -R isort.spec

for py_version in 3.6 3.7 3.8 3.9 3.10; do
  rpmbuild -ba --define "python3_test_version ${py_version}" isort.spec

  # sanity check for provides; if this is broken, so is the test
  rpm -qp --provides ${RPMPKG} | grep "python${py_version}dist(isort)"

  # only the "main" Python version has setuptools installed,
  # everything else does not
  if [ "$py_version" = "$(rpm --eval '%python3_version')" ]; then
    # all main Python/setuptools versions in Fedora 33+ are recent enough
    # not to justify a generated dependency wrt the console_script
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(setuptools)" && exit 1 || true
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(importlib-metadata)"  && exit 1 || true
  else
    # no setuptools installed, we assume an old version of setuptools was used to prepare the data
    # hence the package always requires setuptools
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(setuptools)"
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(importlib-metadata)"  && exit 1 || true
  fi

  # the rest is only possible on the CI or in mock/container, where we are root
  # never run this script as root on your host OS, it is destructive
  # also, it only works once (improvements welcome)
  test $EUID -ne 0 && continue
  export RPM_BUILD_ROOT=/

  # install setuptools and build again
  python${py_version} -m ensurepip
  rpmbuild -ba --define "python3_test_version ${py_version}" isort.spec

  # the ensurepip version of setuptools is recent enough on Fedora 33+
  # WARNING: Once we flip the rpmwheels bcond in python3.6, this assumption will break
  rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(setuptools)"  && exit 1 || true
  # but older Pythons still need importlib_metadata
  if [[ "$py_version" = "3.6" || "$py_version" = "3.7" ]]; then
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(importlib-metadata)"
  else
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(importlib-metadata)" && exit 1 || true
  fi

  # install setuptools 47.2 and build again
  python${py_version} -m pip uninstall --yes setuptools
  python${py_version} -m pip install 'setuptools>=47.2.0,<47.3.0'
  rpmbuild -ba --define "python3_test_version ${py_version}" isort.spec

  # this version of setuptools never uses importlib_metadata
  rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(importlib-metadata)"  && exit 1 || true
  # older Pythons use setuptools, newer Pythons use importlib.metadata
  if [[ "$py_version" = "3.6" || "$py_version" = "3.7" ]]; then
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(setuptools)"
  else
    rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(setuptools)" && exit 1 || true
  fi

  # install an even older setuptools version and build again
  python${py_version} -m pip uninstall --yes setuptools
  python${py_version} -m pip install 'setuptools<47.2.0'
  rpmbuild -ba --define "python3_test_version ${py_version}" isort.spec

  # old console_scripts entyrpoint used pkg_resources only
  rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(setuptools)"
  rpm -qp --requires ${RPMPKG} | grep "python${py_version}dist(importlib-metadata)"  && exit 1 || true
done