Parse ruby specification

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.2.0 / 2013-11-09
+
+* add the ability to parse the ruby version specification
+
 ## 0.1.9 / 2012-11-19
 
 Bugfixes:
@@ -10,7 +14,7 @@ Bugfixes:
 
 * support :github option and exclude gems that use it
 * add CHANGELOG
-  
+
 ## 0.1.7 2012-10-17
 
 Bugfixes:

gemnasium-parser.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |gem|
   gem.name    = "gemnasium-parser"
-  gem.version = "0.1.9"
+  gem.version = "0.2.0"
 
   gem.authors     = "Steve Richert"
   gem.email       = "steve.richert@gmail.com"

lib/gemnasium/parser/gemfile.rb

@@ -28,6 +28,15 @@ def gemspec
         end
       end
 
+      def ruby
+        @ruby ||= begin
+          if spec = matches(Patterns::RUBY_CALL).last
+            opts = Patterns.options(spec["opts"])
+            Bundler::RubyVersion.new(spec['version'], opts['engine'], opts['engine_version'])
+          end
+        end
+      end
+
       def gemspec?
         !!gemspec
       end

lib/gemnasium/parser/patterns.rb

@@ -35,6 +35,9 @@ module Patterns
 
       ADD_DEPENDENCY_CALL = /^[ \t]*\w+\.add(?<type>_runtime|_development)?_dependency\(?[ \t]*#{QUOTED_GEM_NAME}(?:[ \t]*,[ \t]*#{REQUIREMENTS})?[ \t]*\)?[ \t]*#{COMMENT}$/
 
+      QUOTED_RUBY_VERSION = /(?:(?<gq>["'])(?<version>#{VERSION})\k<gq>|%q<(?<version>#{VERSION})>)/
+      RUBY_CALL = /^[ \t]*ruby\(?[ \t]*#{QUOTED_RUBY_VERSION}(?:[ \t]*,[ \t]*(?<opts>#{OPTIONS}))?[ \t]*\)?[ \t]*#{COMMENT}$/
+
       def self.options(string)
         {}.tap do |hash|
           return hash unless string

spec/gemnasium/parser/gemfile_spec.rb

@@ -43,6 +43,21 @@ def reset
     dependencies.size.should == 0
   end
 
+  it "does not barf on missing ruby specification" do
+    content(%(gem "rake"))
+    gemfile.ruby.should == nil
+  end
+
+  it "detects ruby specification" do
+    content(%(ruby "1.8.7"))
+    gemfile.ruby.should == Bundler::RubyVersion.new('1.8.7', 'ruby', '1.8.7')
+  end
+
+  it "detects ruby specification with engine and engine_version" do
+    content(%(ruby "1.8.7", :engine => "jruby", :engine_version => "1.6.7"))
+    gemfile.ruby.should == Bundler::RubyVersion.new('1.8.7', 'jruby', '1.6.7')
+  end
+
   it "parses gems with a period in the name" do
     content(%(gem "pygment.rb", ">= 0.8.7"))
     dependency.name.should == "pygment.rb"