#!/usr/bin/env bash
set -e

usage() {
  echo "Usage: $0 dev|build [src_dir [output_dir]]" >&2
  exit 1
}

checkdir() {
  if [[ -z $1 ]]; then
    echo ""
    return 0
  fi
  local DIR=`readlink -f $1`
  if [[ ! -d "$DIR" ]]; then
    echo "$DIR does not exist or is not a directory" >&2
    usage
  fi
  echo "$DIR"
  return 0
}

case "$1" in
  dev|build) COMMAND="$1" ;;
  *)
      echo "unknown command: '$1'" >&2
      usage
    ;;
esac

export SRC=`checkdir ${2:-src}`
export OUTPUT=`checkdir ${3:-public}`

BASE=`dirname $(readlink -f $0)`/..
exec "$BASE/node_modules/.bin/gulp" --cwd "$BASE" "$COMMAND"