#!/bin/bash

# Bring in the variables from SOLUTION file, supporting
# nested substitution
. SOLUTION

function fail {
  >&2 echo "$*"
  exit -1
}

case "${OS_DISTRO}" in
  rhel)
    SOLUTION_SUFFIX=".rhel-8.0"
    ;;
  ubuntu)
    SOLUTION_SUFFIX=""
    ;;
  *)
    SOLUTION_SUFFIX=".${OS_DISTRO}-${OS_RELEASE}"
    [[ -d "templates/${OS_DISTRO}" ]] || {
      echo "Unrecognized OS_DISTRO: '${OS_DISTRO}'"
      exit -1
    }
    [[ ! -e "Dockerfile.solution.${SOLUTION_SUFFIX}" ]] && {
      SOLUTION_SUFFIX=""
    }
    ;;
esac

[[ ! -e "Dockerfile${SOLUTION_SUFFIX}" ]] && {
  cat << EOF
'${OS_DISTRO}' set as OS_DISTRO, but Dockerfile${SOLUTION_SUFFIX} does
not exist.

Using Dockerfile instead.
EOF

  SOLUTION_SUFFIX=""
}

export DOCKERFILE="Dockerfile${SOLUTION_SUFFIX}"
export SOLUTION="Dockerfile.solution${SOLUTION_SUFFIX}"

[[ "${SOLUTION}" -nt "${DOCKERFILE}" ]] && {
  echo "${SOLUTION} is newer than ${DOCKERFILE}. Running scripts/build-dockerfile.sh"
  scripts/build-dockerfile.sh || fail "Unable to update ${DOCKERFILE}"
}

scripts/build-image.sh || fail "Unable to build ${DOCKERFILE}"