Add more external dep options

* Chicken Scheme
* Node.js
* Rubinius

Closes Homebrew/homebrew#8466.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Library/Homebrew/exceptions.rb

@@ -76,8 +76,10 @@ class UnsatisfiedExternalDependencyError < Homebrew::InstallationError
   def tool
     case type
       when :python then 'easy_install'
-      when :ruby, :jruby then 'rubygems'
+      when :ruby, :jruby, :rbx then 'rubygems'
       when :perl then 'cpan'
+      when :node then 'npm'
+      when :chicken then 'chicken-install'
     end
   end
 
@@ -91,6 +93,12 @@ class UnsatisfiedExternalDependencyError < Homebrew::InstallationError
         "cpan -i"
       when :jruby
         "jruby -S gem install"
+      when :rbx
+        "rbx gem install"
+      when :node
+        "npm install"
+      when :chicken
+        "chicken-install"
     end
   end
 end

Library/Homebrew/formula.rb

@@ -740,7 +740,7 @@ EOF
 
     def depends_on name
       @deps ||= []
-      @external_deps ||= {:python => [], :perl => [], :ruby => [], :jruby => []}
+      @external_deps ||= {:python => [], :perl => [], :ruby => [], :jruby => [], :chicken => [], :rbx => [], :node => []}
 
       case name
       when String, Formula
@@ -748,7 +748,7 @@ EOF
       when Hash
         key, value = name.shift
         case value
-        when :python, :perl, :ruby, :jruby
+        when :python, :perl, :ruby, :jruby, :chicken, :rbx, :node
           @external_deps[value] << key
         when :optional, :recommended, :build
           @deps << key

Library/Homebrew/formula_installer.rb

@@ -319,7 +319,10 @@ def external_dep_check dep, type
     when :python then %W{/usr/bin/env python -c import\ #{dep}}
     when :jruby then %W{/usr/bin/env jruby -rubygems -e require\ '#{dep}'}
     when :ruby then %W{/usr/bin/env ruby -rubygems -e require\ '#{dep}'}
+    when :rbx then %W{/usr/bin/env rbx -rubygems -e require\ '#{dep}'}
     when :perl then %W{/usr/bin/env perl -e use\ #{dep}}
+    when :chicken then %W{/usr/bin/env csi -e (use #{dep})}
+    when :node then %W{/usr/bin/env node -e require('#{dep}');}
   end
 end
 
@@ -343,7 +346,7 @@ class Formula
   end
 
   def check_external_deps
-    [:ruby, :python, :perl, :jruby].each do |type|
+    [:ruby, :python, :perl, :jruby, :rbx, :chicken, :node].each do |type|
       self.external_deps[type].each do |dep|
         unless quiet_system(*external_dep_check(dep, type))
           raise UnsatisfiedExternalDependencyError.new(dep, type)

Library/Homebrew/test/test_external_deps.rb

@@ -73,6 +73,54 @@ class GoodJRubyBall <TestBall
   end
 end
 
+class BadChickenBall <TestBall
+  depends_on "notapackage" => :chicken
+
+  def initialize name=nil
+    super "uses_chicken_ball"
+  end
+end
+
+class GoodChickenBall <TestBall
+  depends_on "extras" => :chicken
+
+  def initialize name=nil
+    super "uses_chicken_ball"
+  end
+end
+
+class BadRubiniusBall <TestBall
+  depends_on "notapackage" => :rbx
+
+  def initialize name=nil
+    super "uses_rubinius_ball"
+  end
+end
+
+class GoodRubiniusBall <TestBall
+  depends_on "date" => :rbx
+
+  def intialize
+    super "uses_rubinius_ball"
+  end
+end
+
+class BadNodeBall <TestBall
+  depends_on "notapackage" => :node
+
+  def initialize
+    super "uses_node_ball"
+  end
+end
+
+class GoodNodeBall <TestBall
+  depends_on "util" => :node
+
+  def initialize
+    super "uses_node_balls"
+  end
+end
+
 
 class ExternalDepsTests < Test::Unit::TestCase
   def check_deps_fail f
@@ -120,4 +168,31 @@ class ExternalDepsTests < Test::Unit::TestCase
   def test_good_jruby_deps
     check_deps_pass GoodJRubyBall unless `/usr/bin/which jruby`.chomp.empty?
   end
+
+  # Only run these next two tests if rubinius is installed.
+  def test_bad_rubinius_deps
+    check_deps_fail BadRubiniusBall unless `/usr/bin/which rbx`.chomp.empty?
+  end
+
+  def test_good_rubinius_deps
+    check_deps_pass GoodRubiniusBall unless `/usr/bin/which rbx`.chomp.empty?
+  end
+
+  # Only run these next two tests if chicken scheme is installed.
+  def test_bad_chicken_deps
+    check_deps_fail BadChickenBall unless `/usr/bin/which csc`.chomp.empty?
+  end
+
+  def test_good_chicken_deps
+    check_deps_pass GoodChickenBall unless `/usr/bin/which csc`.chomp.empty?
+  end
+
+  # Only run these next two tests if node.js is installed.
+  def test_bad_node_deps
+    check_deps_fail BadNodeBall unless `/usr/bin/which node`.chomp.empty?
+  end
+
+  def test_good_node_deps
+    check_deps_pass GoodNodeBall unless `/usr/bin/which node`.chomp.empty?
+  end
 end