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require 'forwardable'
require 'resource'
require 'checksum'
require 'version'
class SoftwareSpec
extend Forwardable
attr_reader :resources, :owner
def_delegators :@resource, :stage, :fetch
def_delegators :@resource, :download_strategy, :verify_download_integrity
def_delegators :@resource, :checksum, :mirrors, :specs, :using, :downloader
def_delegators :@resource, :url, :version, :mirror, *Checksum::TYPES
def initialize url=nil, version=nil
@resource = Resource.new(:default, url, version)
@resources = {}
end
def owner= owner
@resource.owner = owner
resources.each_value { |r| r.owner = owner }
end
def resource? name
resources.has_key?(name)
end
def resource name, &block
if block_given?
raise DuplicateResourceError.new(name) if resource?(name)
resources[name] = Resource.new(name, &block)
else
resources.fetch(name) { raise ResourceMissingError.new(owner, name) }
end
end
end
class HeadSoftwareSpec < SoftwareSpec
def initialize url=nil, version=Version.new(:HEAD)
super
end
def verify_download_integrity fn
return
end
end
class Bottle < SoftwareSpec
attr_rw :root_url, :prefix, :cellar, :revision
def_delegators :@resource, :url=
def initialize
super
@revision = 0
@prefix = '/usr/local'
@cellar = '/usr/local/Cellar'
end
# Checksum methods in the DSL's bottle block optionally take
# a Hash, which indicates the platform the checksum applies on.
Checksum::TYPES.each do |cksum|
class_eval <<-EOS, __FILE__, __LINE__ + 1
def #{cksum}(val=nil)
return @#{cksum} if val.nil?
@#{cksum} ||= Hash.new
case val
when Hash
key, value = val.shift
@#{cksum}[value] = Checksum.new(:#{cksum}, key)
end
if @#{cksum}.has_key? bottle_tag
@resource.checksum = @#{cksum}[bottle_tag]
end
end
EOS
end
end
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