Include list of common languages

lib/linguist/common.yml

@@ -0,0 +1,60 @@
+# The languages which will appear on http://github.com/languages
+
+- Ada
+- ActionScript
+- Arc
+- Assembly
+- ASP
+- Boo
+- C
+- "C#"
+- C++
+- Clojure
+- CoffeeScript
+- ColdFusion
+- Common Lisp
+- D
+- Delphi
+- Dylan
+- Eiffel
+- Emacs Lisp
+- Erlang
+- "F#"
+- Factor
+- FORTRAN
+- Go
+- Groovy
+- Haskell
+- HaXe
+- Io
+- Java
+- JavaScript
+- Lua
+- Max/MSP
+- Mirah
+- Nu
+- Objective-C
+- Objective-J
+- OCaml
+- ooc
+- Perl
+- PHP
+- Pure Data
+- Python
+- R
+- Racket
+- Ruby
+- Scala
+- Scheme
+- sclang
+- Self
+- Shell
+- Smalltalk
+- SuperCollider
+- Tcl
+- Vala
+- Verilog
+- VHDL
+- VimL
+- Visual Basic
+- XQuery

lib/linguist/language.rb

@@ -57,6 +57,7 @@ module Linguist
       @lexer      = Lexer.find_by_alias(@lexer_name)
       @extensions = attributes[:extensions] || []
       @popular    = attributes[:popular] || false
+      @common     = attributes[:common] || false
     end
 
     attr_reader :name, :lexer_name, :lexer, :extensions
@@ -77,6 +78,10 @@ module Linguist
       !popular?
     end
 
+    def common?
+      @common
+    end
+
     def colorize(text)
       lexer.colorize(text)
     end
@@ -95,6 +100,7 @@ module Linguist
   end
 
   popular = YAML.load_file(File.expand_path("../popular.yml", __FILE__))
+  common  = YAML.load_file(File.expand_path("../common.yml", __FILE__))
 
   YAML.load_file(File.expand_path("../extensions.yml", __FILE__)).each do |name, options|
     Language.create(
@@ -102,7 +108,8 @@ module Linguist
       :lexer_name => options[:lexer],
       :default_lexer => options[:default_lexer],
       :extensions => options[:ext],
-      :popular => popular.include?(name)
+      :popular => popular.include?(name),
+      :common => common.include?(name)
     )
   end
 end

test/test_language.rb

@@ -96,6 +96,14 @@ class TestLanguage < Test::Unit::TestCase
     assert Language['Brainfuck'].unpopular?
   end
 
+  def test_common
+    assert Language['Perl'].common?
+    assert Language['Python'].common?
+    assert Language['Ruby'].common?
+    assert !Language['Brainfuck'].common?
+    assert !Language['Makefile'].common?
+  end
+
   def test_colorize
     assert_equal <<-HTML, Language['Text'].colorize("Hello")
 <div class="highlight"><pre>Hello