# Encoding: utf-8

# Cloud Foundry Java Buildpack

# Copyright 2013 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.

require 'fileutils'

require 'java_buildpack/component'

require 'java_buildpack/logging/logger_factory'

require 'java_buildpack/util/filtering_pathname'

require 'pathname'

module JavaBuildpack

module Component

# An abstraction around the droplet that will be created and used at runtime. This abstraction is intended to hide

# the work done by components within their own sandboxes, while exposing changes made to the user's application.

# Think of this as a mutable representation of a component's sandbox and the application that was uploaded.

#

# A new instance of this type should be created for each component.

class Droplet

# @!attribute [r] additional_libraries

# @return [AdditionalLibraries] the shared +AdditionalLibraries+ instance for all components

attr_reader :additional_libraries

# @!attribute [r] component_id

# @return [String] the id of component using this droplet

attr_reader :component_id

# @!attribute [r] java_home

# @return [ImmutableJavaHome, MutableJavaHome] the shared +JavaHome+ instance for all components. If the

# component using this instance is a jre, then this will be an

# instance of +MutableJavaHome+. Otherwise it will be an instance of

# +ImmutableJavaHome+.

attr_reader :java_home

# @!attribute [r] java_opts

# @return [JavaOpts] the shared +JavaOpts+ instance for all components

attr_reader :java_opts

# @!attribute [r] root

# @return [JavaBuildpack::Util::FilteringPathname] the root of the droplet's fileystem filtered so that it

# excludes files in the sandboxes of other components

attr_reader :root

# @!attribute [r] sandbox

# @return [Pathname] the root of the component's sandbox

attr_reader :sandbox

# Creates a new instance of the droplet abstraction

#

# @param [AdditionalLibraries] additional_libraries the shared +AdditionalLibraries+ instance for all components

# @param [String] component_id the id of the component that will use this +Droplet+

# @param [ImmutableJavaHome, MutableJavaHome] java_home the shared +JavaHome+ instance for all components. If the

# component using this instance is a jre, then this should be

# an instance of +MutableJavaHome+. Otherwise it should be an

# instance of +ImmutableJavaHome+.

# @param [JavaOpts] java_opts the shared +JavaOpts+ instance for all components

# @param [Pathname] root the root of the droplet

def initialize(additional_libraries, component_id, java_home, java_opts, root)

@additional_libraries = additional_libraries

@component_id = component_id

@java_home = java_home

@java_opts = java_opts

@logger = JavaBuildpack::Logging::LoggerFactory.instance.get_logger Droplet

buildpack_root = root + '.java-buildpack'

sandbox_root = buildpack_root + component_id

@sandbox = JavaBuildpack::Util::FilteringPathname.new(sandbox_root, ->(path) { in?(path, sandbox_root) }, true)

@root = JavaBuildpack::Util::FilteringPathname.new(root,

->(path) { !in?(path, buildpack_root) || in?(path, @sandbox) },

true)

end

# Copy resources from a components resources directory to a directory

#

# @param [Pathname] target_directory the directory to copy to. Defaults to the component's +sandbox+.

# @return [Void]

def copy_resources(target_directory = @sandbox)

resources = RESOURCES_DIRECTORY + @component_id

if resources.exist?

FileUtils.mkdir_p target_directory

FileUtils.cp_r("#{resources}/.", target_directory)

@logger.debug { "Resources #{resources} found" }

else

@logger.debug { "No resources #{resources} found" }

end

end

private

RESOURCES_DIRECTORY = Pathname.new(File.expand_path('../../../../resources', __FILE__)).freeze

private_constant :RESOURCES_DIRECTORY

def in?(path, root)

path.ascend do |parent|

return true if parent == root

end

false

end

end

end

end