#!/usr/bin/env bash
# Delete a deployed environment after a merge
# checks parent commits for environment/<env>.env

PROTECTED=master

function try_and_delete_environment () {
  if [ -f "environments/${1}.env" ]; then
    make delete env="${1}"
    exit 0
  fi
}

MERGED_ENVIRONMENT="${DRONE_SOURCE_BRANCH##*/}"
if [[ ! "$MERGED_ENVIRONMENT" =~ $PROTECTED ]]; then
  try_and_delete_environment "$MERGED_ENVIRONMENT"

  echo "Checking out parent commits for env file"
  for PARENT in $(git log --pretty=%P -n 1 | tac -s ' '); do
    git checkout "$PARENT"
    try_and_delete_environment "$MERGED_ENVIRONMENT"
  done
fi