Rakefile in opal-0.3.43 vs Rakefile in opal-0.3.44

@@ -45,73 +45,83 @@
 
     #build path for spec files\dirs.
     #Example:
     #spec:core => spec/core/
     #spec:core:array:allocae => spec/core/array/allocate_spec.rb
-    def path(dirs) 
+    def path(dirs)
       path = "#{Dir.pwd}"
       dirs.each do |dir|
-        base = path + "/#{dir}" 
+        base = path + "/#{dir}"
         if Dir.exists?(base)
           path = base
         else
           path = Dir.glob("#{base}_spec.rb")
-        end  
+        end
       end
       path = [path].flatten
       raise "File or Dir with task #{t.name} not found." if path.empty?
       path
     end
-    
+
     RunSpec.new(path(t.name.split(":")))
   end
 end
 
 desc "Build opal.js and opal-parser.js to build/"
 task :dist do
   Opal::Processor.arity_check_enabled = false
 
-  env = Sprockets::Environment.new
-  Opal.paths.each { |p| env.append_path p }
+  env = Opal::Environment.new
 
   Dir.mkdir 'build' unless File.directory? 'build'
 
-  File.open('build/opal.js', 'w+') { |f| f << env['opal'].to_s }
-  File.open('build/opal-parser.js', 'w+') { |f| f << env['opal-parser'].to_s }
-end
+  %w[opal opal-parser].each do |lib|
+    puts "* building #{lib}..."
 
-desc "Check file sizes for opal.js runtime"
-task :sizes do
-  Opal::Processor.arity_check_enabled = false
+    src = env[lib].to_s
+    min = uglify src
+    gzp = gzip min
 
-  env = Sprockets::Environment.new
-  Opal.paths.each { |p| env.append_path p }
+    File.open("build/#{lib}.js", 'w+')        { |f| f << src }
+    File.open("build/#{lib}.min.js", 'w+')    { |f| f << min } if min
+    File.open("build/#{lib}.min.js.gz", 'w+') { |f| f << gzp } if gzp
 
-  src = env['opal'].to_s
-  min = uglify src
-  gzp = gzip min
+    print "done. (development: #{src.size}B"
+    print ", minified: #{min.size}B" if min
+    print ", gzipped: #{gzp.size}Bx"  if gzp
+    puts  ")."
+    puts
+  end
+end
 
-  puts "development: #{src.size}, minified: #{min.size}, gzipped: #{gzp.size}"
+desc "Check file sizes for opal.js runtime"
+task :sizes => :dist do
 end
 
 desc "Rebuild grammar.rb for opal parser"
 task :racc do
   %x(racc -l lib/opal/grammar.y -o lib/opal/grammar.rb)
 end
 
 # Used for uglifying source to minify
 def uglify(str)
-  IO.popen('uglifyjs -nc', 'r+') do |i|
+  IO.popen('uglifyjs --no-mangle --compress warnings=false', 'r+') do |i|
     i.puts str
     i.close_write
     return i.read
   end
+rescue Errno::ENOENT
+  $stderr.puts '"uglifyjs" command not found (install with: "npm install -g uglify-js")'
+  nil
 end
 
 # Gzip code to check file size
 def gzip(str)
   IO.popen('gzip -f', 'r+') do |i|
     i.puts str
     i.close_write
     return i.read
   end
+rescue Errno::ENOENT
+  $stderr.puts '"gzip" command not found, it is required to produce the .gz version'
+  nil
 end