only call the coffeescript compiler as much as needed. so much faster

Gemfile

@@ -11,4 +11,4 @@ gem 'guard-shell'
 gem 'guard-coffeescript'
 gem 'growl'
 gem 'rake', '0.8.7'
-gem 'mocha'
+gem 'mocha', '0.9.12'

bin/jasmine-headless-webkit

@@ -8,6 +8,7 @@ end
 
 $:.unshift(File.join(gem_dir, 'lib'))
 
+require 'benchmark'
 require 'yaml'
 require 'fileutils'
 require 'getoptlong'

lib/jasmine/files_list.rb

@@ -37,25 +37,42 @@ module Jasmine
 
     private
     def to_html(files)
+      coffeescript_run = []
+
       files.collect { |file|
         next @code_for_file[file] if @code_for_file[file]
 
-        @code_for_file[file] = (case File.extname(file)
+        coffeescript_run << file if (ext = File.extname(file)) == '.coffee'
+          
+        output = []
+        if (files.last == file or ext != '.coffee') and !coffeescript_run.empty?
+          output << ensure_coffeescript_run!(coffeescript_run)
+        end
+
+        if ext != '.coffee'
+          output << case File.extname(file)
           when '.js'
             %{<script type="text/javascript" src="#{file}"></script>}
-        when '.coffee'
-          begin
-            %{<script type="text/javascript">#{CoffeeScript.compile(fh = File.open(file))}</script>}
+          when '.css'
+            %{<link rel="stylesheet" href="#{file}" type="text/css" />}
+          end
+        end
+
+        @code_for_file[file] = output
+      }.flatten.reject(&:empty?)
+    end
+
+    def ensure_coffeescript_run!(files)
+      data = StringIO.new
+      files.each { |file| data << File.read(file) }
+      data.rewind
+
+      %{<script type="text/javascript">#{CoffeeScript.compile(data)}</script>}
     rescue CoffeeScript::CompilationError => e
       puts "[%s] %s: %s" % [ 'coffeescript'.color(:red), file.color(:yellow), e.message.to_s.color(:white) ]
       exit 1
     ensure
-            fh.close
-          end
-        when '.css'
-          %{<link rel="stylesheet" href="#{file}" type="text/css" />}
-        end)
-      }
+      files.clear
     end
 
     def spec_filter

spec/lib/jasmine/files_list_spec.rb

@@ -112,6 +112,7 @@ describe Jasmine::FilesList do
   describe '#.*files_to_html' do
     include FakeFS::SpecHelpers
 
+    context 'one coffeescript file' do
       before do
         files_list.instance_variable_set(:@files, [
                                          'test.js',
@@ -124,12 +125,12 @@ describe Jasmine::FilesList do
                                          'test.coffee'
         ])
 
-      File.open('test.coffee', 'w')
+        File.open('test.coffee', 'w') { |fh| fh.print "first" }
 
-      CoffeeScript.stubs(:compile).returns("i compiled")
+        CoffeeScript.stubs(:compile).with() { |field| field.read == "first" }.returns("i compiled")
       end
 
-    describe '#files_to_html' do
+      context '#files_to_html' do
         it "should create the right HTML" do
           files_list.files_to_html.should == [
             %{<script type="text/javascript" src="test.js"></script>},
@@ -139,7 +140,7 @@ describe Jasmine::FilesList do
         end
       end
 
-    describe '#filtered_files_to_html' do
+      context '#filtered_files_to_html' do
         it "should create the right HTML" do
           files_list.filtered_files_to_html.should == [
             %{<script type="text/javascript" src="test.js"></script>},
@@ -148,5 +149,37 @@ describe Jasmine::FilesList do
         end
       end
     end
+
+    context 'two coffeescript files' do
+      before do
+        files_list.instance_variable_set(:@files, [
+                                         'test.js',
+                                         'test.coffee',
+                                         'test2.coffee',
+                                         'test.css'
+        ])
+
+        files_list.instance_variable_set(:@filtered_files, [
+                                         'test.js',
+                                         'test.coffee'
+        ])
+
+        File.open('test.coffee', 'w') { |fh| fh.print "first" }
+        File.open('test2.coffee', 'w') { |fh| fh.print "second" }
+
+        CoffeeScript.stubs(:compile).with() { |field| field.read == "firstsecond" }.returns("i compiled")
+      end
+
+      context '#files_to_html' do
+        it "should create the right HTML" do
+          files_list.files_to_html.should == [
+            %{<script type="text/javascript" src="test.js"></script>},
+            %{<script type="text/javascript">i compiled</script>},
+            %{<link rel="stylesheet" href="test.css" type="text/css" />}
+          ]
+        end
+      end
+    end
+  end
 end