Set things up to start working on the platform DSL

1 files changed, 21 insertions, 1 deletions

diff --git a/lib/bundler/dependency.rb b/lib/bundler/dependency.rb
index dacf991e04..1d0a912d96 100644
--- a/lib/bundler/dependency.rb
+++ b/lib/bundler/dependency.rb
@@ -7,19 +7,39 @@ module Bundler
     attr_reader :groups
     attr_reader :platforms
 
+    PLATFORM_MAP = {
+      :ruby    => Gem::Platform::RUBY,
+      :ruby_18 => Gem::Platform::RUBY,
+      :ruby_19 => Gem::Platform::RUBY,
+      :jruby   => Gem::Platform::JAVA,
+      :mswin   => Gem::Platform::MSWIN
+    }
+
     def initialize(name, version, options = {}, &blk)
       super(name, version)
 
       @autorequire = nil
       @groups      = Array(options["group"] || :default).map { |g| g.to_sym }
       @source      = options["source"]
-      @platforms   = []
+      @platforms   = Array(options["platforms"])
 
       if options.key?('require')
         @autorequire = Array(options['require'] || [])
       end
     end
 
+    def gem_platforms(valid_platforms)
+      return valid_platforms if @platforms.empty?
+
+      platforms = []
+      @platforms.each do |p|
+        platform = PLATFORM_MAP[p]
+        next unless valid_platforms.include?(platform)
+        platforms |= [platform]
+      end
+      platforms
+    end
+
     def to_lock
       out = "  #{name}"