From 30b63b090c9ab4f733f91b0141100865e8bc99ac Mon Sep 17 00:00:00 2001
From: Carl Lerche <carllerche@mac.com>
Date: Sun, 6 Jun 2010 13:02:17 -0700
Subject: Get the basic platform DSL working

---
 lib/bundler/definition.rb          |  1 +
 lib/bundler/dependency.rb          | 27 +++++++++++++++++++++++++++
 spec/install/gems/platform_spec.rb | 16 ++++++++++++++--
 spec/support/matchers.rb           |  6 +++++-
 spec/support/platforms.rb          | 14 ++++++++++++++
 5 files changed, 61 insertions(+), 3 deletions(-)

diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index 5f07ebbc27..e22ab9c159 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -66,6 +66,7 @@ module Bundler
 
     def specs_for(groups)
       deps = dependencies.select { |d| (d.groups & groups).any? }
+      deps.delete_if { |d| !d.current_platform? }
       specs.for(expand_dependencies(deps))
     end
 
diff --git a/lib/bundler/dependency.rb b/lib/bundler/dependency.rb
index 1d0a912d96..060ccce592 100644
--- a/lib/bundler/dependency.rb
+++ b/lib/bundler/dependency.rb
@@ -40,6 +40,11 @@ module Bundler
       platforms
     end
 
+    def current_platform?
+      return true if @platforms.empty?
+      @platforms.any? { |p| send("#{p}?") }
+    end
+
     def to_lock
       out = "  #{name}"
 
@@ -51,5 +56,27 @@ module Bundler
 
       out << "\n"
     end
+
+  private
+
+    def ruby?
+      !mswin? && (!defined?(RUBY_ENGINE) || RUBY_ENGINE == "ruby" || RUBY_ENGINE == "rbx")
+    end
+
+    def ruby_18?
+      ruby? && RUBY_VERSION < "1.9"
+    end
+
+    def ruby_19?
+      ruby? && RUBY_VERSION >= "1.9"
+    end
+
+    def jruby?
+      RUBY_ENGINE == "jruby"
+    end
+
+    def mswin?
+      # w0t?
+    end
   end
 end
diff --git a/spec/install/gems/platform_spec.rb b/spec/install/gems/platform_spec.rb
index e8e2020d25..e1b00bf8cf 100644
--- a/spec/install/gems/platform_spec.rb
+++ b/spec/install/gems/platform_spec.rb
@@ -87,15 +87,27 @@ end
 
 # TODO: Don't make the tests hardcoded to a platform
 describe "bundle install with platform conditionals" do
-  it "works" do
+  it "installs gems tagged w/ the current platform" do
     install_gemfile <<-G
       source "file://#{gem_repo1}"
 
-      platforms :ruby do
+      platforms :#{local_tag} do
         gem "nokogiri"
       end
     G
 
     should_be_installed "nokogiri 1.4.2"
   end
+
+  it "doesn't install gems tagged w/ a different platform" do
+    install_gemfile <<-G
+      source "file://#{gem_repo1}"
+
+      platforms :#{not_local_tag} do
+        gem "nokogiri"
+      end
+    G
+
+    should_not_be_installed "nokogiri"
+  end
 end
\ No newline at end of file
diff --git a/spec/support/matchers.rb b/spec/support/matchers.rb
index c70522c3c9..ba32897ac2 100644
--- a/spec/support/matchers.rb
+++ b/spec/support/matchers.rb
@@ -53,7 +53,11 @@ module Spec
             puts "WIN"
           end
         R
-        out.should == "WIN" || Gem::Version.new(out).should_not == Gem::Version.new(version)
+        if version.nil? || out == "WIN"
+          out.should == "WIN"
+        else
+          Gem::Version.new(out).should_not == Gem::Version.new(version)
+        end
       end
     end
 
diff --git a/spec/support/platforms.rb b/spec/support/platforms.rb
index 18fa233183..e17573855a 100644
--- a/spec/support/platforms.rb
+++ b/spec/support/platforms.rb
@@ -27,5 +27,19 @@ module Spec
     def not_local
       all_platforms.reject { |p| p == Gem::Platform.local }
     end
+
+    def local_tag
+      if RUBY_PLATFORM == "java"
+        :jruby
+      elsif RUBY_VERSION >= "1.9"
+        :ruby_19
+      else
+        :ruby_18
+      end
+    end
+
+    def not_local_tag
+      [:ruby_18, :ruby_19, :jruby].find { |tag| tag != local_tag }
+    end
   end
 end
\ No newline at end of file
-- 
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