# frozen_string_literal: true

# Cloud Foundry Java Buildpack

# Copyright 2013-2018 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 'pathname'

require 'java_buildpack/util'

require 'java_buildpack/util/jar_finder'

require 'java_buildpack/util/java_main_utils'

require 'java_buildpack/util/shell'

module JavaBuildpack

module Util

# Utilities for dealing with Spring Boot applications

class SpringBootUtils

include JavaBuildpack::Util::Shell

def initialize

@jar_finder = JavaBuildpack::Util::JarFinder.new(/.*spring-boot-([\d].*)\.jar/)

end

# Caches the dependencies of a Thin Launcher application by execute the application with +dryRun+

#

# @param [Pathname] java_home the Java home to find +java+ in

# @param [Pathname] application_root the root of the application to run

# @param [Pathname] thin_root the root to cache cache dependencies at

def cache_thin_dependencies(java_home, application_root, thin_root)

shell "#{java_home + 'bin/java'} -Dthin.dryrun -Dthin.root=#{thin_root} -cp #{application_root} #{THIN_WRAPPER}"

end

# Indicates whether an application is a Spring Boot application

#

# @param [Application] application the application to search

# @return [Boolean] +true+ if the application is a Spring Boot application, +false+ otherwise

def is?(application)

JavaBuildpack::Util::JavaMainUtils.manifest(application).key?(SPRING_BOOT_VERSION) ||

@jar_finder.is?(application)

end

# Indicates whether an application is a Spring Boot Thin Launcher application

#

# @param [Application] application the application to search

# @return [Boolean] +true+ if the application is a Spring Boot Thin Launcher application, +false+ otherwise

def thin?(application)

THIN_WRAPPER == JavaBuildpack::Util::JavaMainUtils.main_class(application)

end

# The lib directory of Spring Boot used by the application

#

# @param [Droplet] droplet the droplet to search

# @return [String] the lib directory of Spring Boot used by the application

def lib(droplet)

candidate = manifest_lib_dir(droplet)

return candidate if candidate&.exist?

candidate = boot_inf_lib_dir(droplet)

return candidate if candidate&.exist?

candidate = web_inf_lib_dir(droplet)

return candidate if candidate&.exist?

candidate = lib_dir(droplet)

return candidate if candidate&.exist?

raise 'No lib directory found'

end

# The version of Spring Boot used by the application

#

# @param [Application] application the application to search

# @return [String] the version of Spring Boot used by the application

def version(application)

JavaBuildpack::Util::JavaMainUtils.manifest(application)[SPRING_BOOT_VERSION] ||

@jar_finder.version(application)

end

private

SPRING_BOOT_LIB = 'Spring-Boot-Lib'

SPRING_BOOT_VERSION = 'Spring-Boot-Version'

THIN_WRAPPER = 'org.springframework.boot.loader.wrapper.ThinJarWrapper'

private_constant :SPRING_BOOT_LIB, :SPRING_BOOT_VERSION

def boot_inf_lib_dir(droplet)

droplet.root + 'BOOT-INF/lib'

end

def manifest_lib_dir(droplet)

value = JavaBuildpack::Util::JavaMainUtils.manifest(droplet)[SPRING_BOOT_LIB]

value ? droplet.root + value : nil

end

def lib_dir(droplet)

droplet.root + 'lib'

end

def web_inf_lib_dir(droplet)

droplet.root + 'WEB-INF/lib'

end

end

end

end