#!/bin/bash
# Copyright (C) Extensible Service Proxy Authors
# All rights reserved.

# This script will download the service config and build it into
# serverless docker image to be used for Cloud Run.
#
# gcloud SDK has to be installed and configured with:
#   gcloud config set project ${PROJECT}
#   gcloud auth login
#
# Following gcloud commands can be used to find out service name
#   gcloud endpoints services list
#   gcloud endpoints configs list --service=${SERVICE}
# Use the latest one for the CONFIG_ID

function error_exit() {
  # ${BASH_SOURCE[1]} is the file name of the caller.
  echo "${BASH_SOURCE[1]}: line ${BASH_LINENO[0]}: ${1:-Unknown Error.} (exit ${2:-1})" 1>&2
  exit ${2:-1}
}

while getopts :c:s:p: arg; do
  case ${arg} in
    c) CONFIG_ID="${OPTARG}";;
    s) SERVICE="${OPTARG}";;
    p) PROJECT="${OPTARG}";;
    \?) error_exit "Unrecognized argument -${OPTARG}";;
  esac
done

[[ -n "${PROJECT}" ]] || error_exit "Missing required PROJECT"
[[ -n "${SERVICE}" ]] || error_exit "Missing required SERVICE"
[[ -n "${CONFIG_ID}" ]] || error_exit "Missing required CONFIG_ID"

(
set -x
cd "$(mktemp -d /tmp/docker.XXXX)"

gcloud endpoints configs describe "${CONFIG_ID}" --project="${PROJECT}" \
  --service="${SERVICE}" --format=json > service.json \
  || error_exit "Failed to download service config"


cat <<"EOF" > Dockerfile
FROM gcr.io/endpoints-release/endpoints-runtime-serverless:1

ENV ENDPOINTS_SERVICE_PATH /etc/nginx/service.json
COPY service.json ${ENDPOINTS_SERVICE_PATH}

ENTRYPOINT ["/env-start-esp.py"]
EOF

NEW_IMAGE="gcr.io/${PROJECT}/endpoints-runtime-serverless:${CONFIG_ID}"
gcloud builds submit --tag "${NEW_IMAGE}" .
)