#!/bin/bash
WARNED='0'
FAILED='0'
FEATURES='-ipc-sandbox -network-sandbox -pid-sandbox'
export FEATURES
[ -d '/etc/portage/env' ] || mkdir -p /etc/portage/env/
printf 'FEATURES="%s test"' "${FEATURES}" >> /etc/portage/env/features-test

pretend_build() {
  emerge --getbinpkg=y --buildpkg=n --jobs="$(nproc)" --load-average="$(nproc)" --verbose --pretend "${1}"
}

dep_build() {
  emerge --getbinpkg=y --buildpkg=n --jobs="$(nproc)" --load-average="$(nproc)" --verbose --onlydeps "${1}"
}

build() {
  emerge --getbinpkg=y --buildpkg=n --jobs="$(nproc)" --load-average="$(nproc)" --verbose "${1}"
}

for i in $(git --no-pager diff --name-only "$(git rev-parse --verify origin/master 2> /dev/null)" HEAD); do
  if [ "${i%.ebuild}" != "${i}" ]; then
    test_ebuild="$(printf '%s' "${i%.ebuild}" | awk -F'/' '{print "="$1"/"$3}')"
    printf '%s features-test' "${test_ebuild}" >> /etc/portage/package.env
    printf '%s looks like an ebuild, testing visibility\n' "${i}"
    if pretend_build "${test_ebuild}" ; then
      printf '%s appears to be unmasked, building deps\n' "${i}"
      if dep_build "${test_ebuild}"; then
        printf '%s deps have built, build testing\n' "${i}"
        if build "${test_ebuild}"; then
          printf '%s build SUCCESS\n' "${i}"
        else
          printf '%s build FAILED\n' "${i}"
          FAILED="1"
        fi
      else
        printf 'WARNING WARNING WARNING\n'
        printf '%s deps failed to build.  This is a bad sign which we are ignoring for now\n' "${i}"
        printf 'WARNING WARNING WARNING\n'
        WARNED='1'
      fi
    else
      printf '%s appears to be masked, skipping build test\n' "${i}"
    fi
  fi
done
if [ "${WARNED}" = '1' ]; then
  printf 'WARNING WARNING WARNING\n'
  printf 'There were warnings during this build which may be fatal later.  Please review the logs.\n'
  printf 'WARNING WARNING WARNING\n'
else
  printf 'No warnings generated by this script.\n'
fi
if [ "${FAILED}" = '0' ]; then
  printf 'No failures seen by this script.\n'
else
  printf 'FAILED FAILED FAILED\n'
  printf 'Something above failed, please review the output.\n'
  printf 'FAILED FAILED FAILED\n'
fi
exit "${FAILED}"