From 48a8af32f3889a2b022c85f7258168150c4c00b4 Mon Sep 17 00:00:00 2001
From: Jack Nagel <jacknagel@gmail.com>
Date: Sun, 27 Jan 2013 23:57:34 -0600
Subject: [PATCH] Filter optional and reccommended requirements

---
 Library/Homebrew/formula_installer.rb | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index adafbc11dd..623d2b9303 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -104,15 +104,23 @@ class FormulaInstaller
   end
 
   def check_requirements
-    needed_reqs = ARGV.filter_for_dependencies do
-      f.recursive_requirements.reject(&:satisfied?)
+    unsatisfied = ARGV.filter_for_dependencies do
+      f.recursive_requirements.select do |req|
+        if req.satisfied?
+          false
+        elsif req.build?
+          not pour_bottle?
+        elsif req.optional? || req.recommended?
+          f.recursive_dependencies.map(&:to_formula).any? do |dep|
+            dep.build.with?(req.name)
+          end || f.build.with?(req.name)
+        end
+      end
     end
 
-    needed_reqs.reject!(&:build?) if pour_bottle?
-
-    unless needed_reqs.empty?
-      puts needed_reqs.map(&:message) * "\n"
-      fatals = needed_reqs.select(&:fatal?)
+    unless unsatisfied.empty?
+      puts unsatisfied.map(&:message) * "\n"
+      fatals = unsatisfied.select(&:fatal?)
       raise UnsatisfiedRequirements.new(f, fatals) unless fatals.empty?
     end
   end