Clean up SoftwareSpec and Resource initializers

Library/Homebrew/cmd/create.rb

@@ -104,8 +104,8 @@ class FormulaCreator
 
     # XXX: why is "and version" here?
     unless ARGV.include? "--no-fetch" and version
-      r = Resource.new(:default, url, version)
-      r.owner = self
+      r = Resource.new
+      r.url, r.version, r.owner = url, version, self
       @sha1 = r.fetch.sha1 if r.download_strategy == CurlDownloadStrategy
     end
 

Library/Homebrew/resource.rb

@@ -10,18 +10,16 @@ class Resource
 
   attr_reader :name
   attr_reader :checksum, :mirrors, :specs, :using
+  attr_writer :url, :checksum, :version
 
   # Formula name must be set after the DSL, as we have no access to the
   # formula name before initialization of the formula
   attr_accessor :owner
 
-  # XXX: for bottles, address this later
-  attr_writer :url, :checksum
-
-  def initialize name, url=nil, version=nil, &block
+  def initialize name=nil, &block
     @name = name
-    @url = url
-    @version = version
+    @url = nil
+    @version = nil
     @mirrors = []
     @specs = {}
     @checksum = nil
@@ -34,7 +32,7 @@ class Resource
   end
 
   def download_name
-    name == :default ? owner.name : "#{owner.name}--#{name}"
+    name.nil? ? owner.name : "#{owner.name}--#{name}"
   end
 
   def download_strategy

Library/Homebrew/software_spec.rb

@@ -17,8 +17,8 @@ class SoftwareSpec
   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)
+  def initialize
+    @resource = Resource.new
     @resources = {}
     @build = BuildOptions.new(ARGV.options_only)
     @dependency_collector = DependencyCollector.new
@@ -65,8 +65,10 @@ class SoftwareSpec
 end
 
 class HeadSoftwareSpec < SoftwareSpec
-  def initialize url=nil, version=Version.new(:HEAD)
+  def initialize
     super
+    @resource.url = url
+    @resource.version = Version.new('HEAD')
   end
 
   def verify_download_integrity fn