#!/usr/bin/env ruby
# Encoding: utf-8
# Cloud Foundry Java Buildpack
# Copyright 2013-2016 the original author or authors.
#
# 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.

$stdout.sync = true
$stderr.sync = true
$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)

require 'java_buildpack/buildpack'

build_dir = ARGV[0]

components = JavaBuildpack::Buildpack.with_buildpack(build_dir, 'Detect failed with exception %s') do |buildpack|
  buildpack.detect
end.compact

if components.empty?
  abort
else
  str = components.join(' ')
  puts str.length > 255 ? str.slice(0..251) + '...' : str
end