#!/usr/bin/env bash

# Copyright 2016 The Kubernetes Authors All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Bash 'Strict Mode'
# http://redsymbol.net/articles/unofficial-bash-strict-mode
set -euo pipefail
IFS=$'\n\t'

# Helper Functions -------------------------------------------------------------

# Display error message and exit
error_exit() {
  echo "error: ${1:-"unknown error"}" 1>&2
  exit 1
}

# Checks if a command exists.  Returns 1 or 0
command_exists() {
  hash "${1}" 2>/dev/null
}

# Program Functions ------------------------------------------------------------

verify_prereqs() {
  echo "Verifying Prerequisites...."
  if command_exists gsutil; then
    echo "Thumbs up! Looks like you have gsutil. Let's continue."
  else
    error_exit "Couldn't find gsutil. Bailing out."
  fi
}

# Main -------------------------------------------------------------------------

main() {

  echo "Deleting previous repository folder..."
  rm -rf repository/
  echo "Packaging all repositories..."
  for d in */; do 
    echo "Packging $d ..."
    helm package $d
  done
  mkdir repository/
  mv *.tgz repository/
  helm repo index repository/ --url http://influx-charts.storage.googleapis.com

  echo "Getting ready to sync your local directory (./repository) to a remote repository at gs://influx-charts"

  verify_prereqs

  # dry run of the command
  gsutil rsync -d -n repository/ gs://influx-charts

  echo "Syncing repository/ with gs://influx-charts"
  gsutil rsync -d repository/ gs://influx-charts

  echo "Your remote chart repository now matches the contents of the repository/ directory!"

}

main "${@:-}"