From 020c1adebd8d847954ee19a5600466ceab4ba562 Mon Sep 17 00:00:00 2001
From: Shaun Jackman <sjackman@gmail.com>
Date: Fri, 8 Dec 2017 10:18:51 -0800
Subject: [PATCH] X11Requirement: Inherit from generic class [macOS]

Fix the warning: already initialized constant X11Requirement
---
 .../os/mac/requirements/x11_requirement.rb    | 25 +------------------
 Library/Homebrew/requirement.rb               |  6 +++--
 2 files changed, 5 insertions(+), 26 deletions(-)

diff --git a/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb b/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb
index ae4f5b8edf..0c319d1de3 100644
--- a/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb
+++ b/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb
@@ -1,21 +1,9 @@
 require "requirement"
 
-class XQuartzRequirement < Requirement
-  include Comparable
-
-  fatal true
+class X11Requirement < Requirement
   cask "xquartz"
   download "https://xquartz.macosforge.org"
 
-  env { ENV.x11 }
-
-  def initialize(name = "x11", tags = [])
-    @name = name
-    # no-op on version specified as a tag argument
-    tags.shift if /(\d\.)+\d/ =~ tags.first
-    super(tags)
-  end
-
   def min_version
     MacOS::XQuartz.minimum_version
   end
@@ -28,15 +16,4 @@ class XQuartzRequirement < Requirement
   def message
     "XQuartz #{min_version} (or newer) is required to install this formula. #{super}"
   end
-
-  def <=>(other)
-    return unless other.is_a? X11Requirement
-    0
-  end
-
-  def inspect
-    "#<#{self.class.name}: #{name.inspect} #{tags.inspect}>"
-  end
 end
-
-X11Requirement = XQuartzRequirement
diff --git a/Library/Homebrew/requirement.rb b/Library/Homebrew/requirement.rb
index 95807d5aef..91f84157e7 100644
--- a/Library/Homebrew/requirement.rb
+++ b/Library/Homebrew/requirement.rb
@@ -170,8 +170,10 @@ class Requirement
     attr_rw :fatal, :default_formula
     attr_rw :cask, :download
 
-    def satisfy(options = {}, &block)
-      @satisfied ||= Requirement::Satisfier.new(options, &block)
+    def satisfy(options = nil, &block)
+      return @satisfied if options.nil? && !block_given?
+      options = {} if options.nil?
+      @satisfied = Requirement::Satisfier.new(options, &block)
     end
 
     def env(*settings, &block)