#!/usr/bin/env bash

function error_handler() {
  echo >&2 "Exited with BAD EXIT CODE '${2}' in ${0} script at line: ${1}."
  exit "$2"
}
trap 'error_handler ${LINENO} $?' ERR
set -o errtrace -o errexit -o nounset -o pipefail

if [[ -z "${SPIFFWORKFLOW_BACKEND_GIT_PUBLISH_CLONE_URL:-}" ]]; then
  echo >&2 "ERROR: SPIFFWORKFLOW_BACKEND_GIT_PUBLISH_CLONE_URL must be specified to clone the git repo."
  exit 1
fi

if [[ -z "${SPIFFWORKFLOW_BACKEND_GIT_SOURCE_BRANCH:-}" ]]; then
  echo >&2 "ERROR: SPIFFWORKFLOW_BACKEND_GIT_SOURCE_BRANCH must be specified to clone the git repo."
  exit 1
fi

if [[ -z "${SPIFFWORKFLOW_BACKEND_BPMN_SPEC_ABSOLUTE_DIR:-}" ]]; then
  echo >&2 "ERROR: SPIFFWORKFLOW_BACKEND_BPMN_SPEC_ABSOLUTE_DIR must be specified to clone the git repo."
  exit 1
fi

if [[ -n "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY:-}" ]]; then
  if [[ -z "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH:-}" ]]; then
    export SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH=$(mktemp /tmp/ssh_private_key.XXXXXX)
  fi
  chmod 600 "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH}"
  echo "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY}" >"${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH}"
fi

# otherwise git clone will not clone since the directory is not empty
if [[ -d "${SPIFFWORKFLOW_BACKEND_BPMN_SPEC_ABSOLUTE_DIR}/lost+found" ]]; then
  rm -r "${SPIFFWORKFLOW_BACKEND_BPMN_SPEC_ABSOLUTE_DIR}/lost+found"
fi

export GIT_SSH_COMMAND="ssh -F /dev/null -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i ${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH}"
git clone -b "$SPIFFWORKFLOW_BACKEND_GIT_SOURCE_BRANCH" "$SPIFFWORKFLOW_BACKEND_GIT_PUBLISH_CLONE_URL" "$SPIFFWORKFLOW_BACKEND_BPMN_SPEC_ABSOLUTE_DIR"