From 304a225058d64614de44c086ed424d4d772d9616 Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Sun, 20 May 2012 14:25:13 -0500
Subject: [PATCH] Add deprecated runtime flag

---
 Rakefile                       | 2 +-
 lib/execjs/disabled_runtime.rb | 4 ++++
 lib/execjs/external_runtime.rb | 5 +++++
 lib/execjs/runtime.rb          | 4 ++++
 lib/execjs/runtimes.rb         | 2 +-
 5 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/Rakefile b/Rakefile
index 34e997b..b80407d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -7,7 +7,7 @@ require "execjs/runtimes"
 
 tests = namespace :test do |tests|
   ExecJS::Runtimes.names.each do |name|
-    next if name.to_s == "Disabled"
+    next if ExecJS::Runtimes.const_get(name).deprecated?
 
     task(name.downcase) do
       ENV["EXECJS_RUNTIME"] = name.to_s
diff --git a/lib/execjs/disabled_runtime.rb b/lib/execjs/disabled_runtime.rb
index 27a33e2..dc67e82 100644
--- a/lib/execjs/disabled_runtime.rb
+++ b/lib/execjs/disabled_runtime.rb
@@ -18,6 +18,10 @@ module ExecJS
       raise Error, "ExecJS disabled"
     end
 
+    def deprecated?
+      true
+    end
+
     def available?
       true
     end
diff --git a/lib/execjs/external_runtime.rb b/lib/execjs/external_runtime.rb
index 54b4e22..4877975 100644
--- a/lib/execjs/external_runtime.rb
+++ b/lib/execjs/external_runtime.rb
@@ -95,6 +95,7 @@ module ExecJS
       @test_args   = options[:test_args]
       @test_match  = options[:test_match]
       @encoding    = options[:encoding]
+      @deprecated  = !!options[:deprecated]
       @binary      = nil
     end
 
@@ -103,6 +104,10 @@ module ExecJS
       binary ? true : false
     end
 
+    def deprecated?
+      @deprecated
+    end
+
     private
       def binary
         @binary ||= locate_binary
diff --git a/lib/execjs/runtime.rb b/lib/execjs/runtime.rb
index 92603f4..f64b67f 100644
--- a/lib/execjs/runtime.rb
+++ b/lib/execjs/runtime.rb
@@ -44,6 +44,10 @@ module ExecJS
       context_class.new(self, source)
     end
 
+    def deprecated?
+      false
+    end
+
     def available?
       raise NotImplementedError
     end
diff --git a/lib/execjs/runtimes.rb b/lib/execjs/runtimes.rb
index cb4d837..467c226 100644
--- a/lib/execjs/runtimes.rb
+++ b/lib/execjs/runtimes.rb
@@ -52,7 +52,7 @@ module ExecJS
     end
 
     def self.best_available
-      runtimes.find(&:available?)
+      runtimes.reject(&:deprecated?).find(&:available?)
     end
 
     def self.from_environment