Extract attr_rw from Formula for reuse

Closes Homebrew/homebrew#20239.

Library/Homebrew/compilers.rb

@@ -6,19 +6,12 @@ end
 
 class CompilerFailure
   attr_reader :compiler
+  attr_rw :build, :cause
 
   def initialize compiler, &block
     @compiler = compiler
     instance_eval(&block) if block_given?
-    @build ||= 9999
+    @build = (@build || 9999).to_i
-  end
-
-  def build val=nil
-    val.nil? ? @build.to_i : @build = val.to_i
-  end
-
-  def cause val=nil
-    val.nil? ? @cause : @cause = val
   end
 end
 

Library/Homebrew/extend/module.rb

@@ -0,0 +1,11 @@
+class Module
+  def attr_rw(*attrs)
+    attrs.each do |attr|
+      module_eval <<-EOS, __FILE__, __LINE__ + 1
+        def #{attr}(val=nil)
+          val.nil? ? @#{attr} : @#{attr} = val
+        end
+      EOS
+    end
+  end
+end

Library/Homebrew/formula.rb

@@ -688,16 +688,6 @@ class Formula
   class << self
     # The methods below define the formula DSL.
 
-    def self.attr_rw(*attrs)
-      attrs.each do |attr|
-        class_eval <<-EOS, __FILE__, __LINE__ + 1
-          def #{attr}(val=nil)
-            val.nil? ? @#{attr} : @#{attr} = val
-          end
-        EOS
-      end
-    end
-
     attr_rw :homepage, :keg_only_reason, :skip_clean_all, :cc_failures
     attr_rw :plist_startup, :plist_manual
 

Library/Homebrew/formula_support.rb

@@ -77,6 +77,7 @@ end
 
 class Bottle < SoftwareSpec
   attr_writer :url
+  attr_rw :root_url, :prefix, :cellar, :revision
 
   def initialize
     super
@@ -103,22 +104,6 @@ class Bottle < SoftwareSpec
       end
     EOS
   end
-
-  def root_url val=nil
-    val.nil? ? @root_url : @root_url = val
-  end
-
-  def prefix val=nil
-    val.nil? ? @prefix : @prefix = val
-  end
-
-  def cellar val=nil
-    val.nil? ? @cellar : @cellar = val
-  end
-
-  def revision val=nil
-    val.nil? ? @revision : @revision = val
-  end
 end
 
 

Library/Homebrew/global.rb

@@ -1,3 +1,4 @@
+require 'extend/module'
 require 'extend/fileutils'
 require 'extend/pathname'
 require 'extend/ARGV'

Library/Homebrew/requirement.rb

@@ -88,18 +88,7 @@ class Requirement
   end
 
   class << self
-    # The default formula to install to satisfy this requirement.
+    attr_rw :fatal, :build, :default_formula
-    def default_formula(val=nil)
-      val.nil? ? @default_formula : @default_formula = val.to_s
-    end
-
-    def fatal(val=nil)
-      val.nil? ? @fatal : @fatal = val
-    end
-
-    def build(val=nil)
-      val.nil? ? @build : @build = val
-    end
 
     def satisfy(options={}, &block)
       @satisfied ||= Requirement::Satisfier.new(options, &block)

Library/Homebrew/test/testing_env.rb

@@ -7,9 +7,11 @@
 ABS__FILE__ = File.expand_path(__FILE__)
 $:.push(File.expand_path(__FILE__+'/../..'))
 
+require 'extend/module'
 require 'extend/fileutils'
 require 'extend/pathname'
 require 'extend/string'
+require 'extend/symbol'
 require 'exceptions'
 require 'utils'
 require 'rbconfig'