Module: CoffeeScript

Defined in:
lib/coffee-rails-source-maps.rb

Class Method Summary collapse

Class Method Details

.compile(script, options = {}) ⇒ Object 



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# File 'lib/coffee-rails-source-maps.rb', line 12

def compile(script, options = {})
  script = script.read if script.respond_to?(:read)

  if options.key?(:no_wrap) && !options.key?(:bare)
    options[:bare] = options[:no_wrap]
  else
    options[:bare] = false
  end

  pathname = options[:pathname]
  if pathname.nil?
    return Source.context.call("CoffeeScript.compile", script, options)
  else
    clean_name = pathname.basename.to_s.split(".").first

    rel_path = if pathname.to_s.start_with?(Bundler.bundle_path.to_s)
      Pathname('bundler').join(pathname.relative_path_from(Bundler.bundle_path)).dirname
    else
      pathname.relative_path_from(Rails.root).dirname
    end

    map_dir = Rails.root.join("public/" + Rails.configuration.assets.prefix, "source_maps", rel_path)
    map_dir.mkpath

    map_file    = map_dir.join("#{clean_name}.map")
    coffee_file = map_dir.join("#{clean_name}.coffee")

    options[:sourceMap]   = true
    options[:filename]    = "#{clean_name}.coffee" # coffee requires filename option to work with source maps (see http://coffeescript.org/documentation/docs/coffee-script.html#section-4)
    options[:sourceFiles] = ["/#{coffee_file.relative_path_from(Rails.root.join("public"))}"] # specify coffee source file explicitly (see http://coffeescript.org/documentation/docs/sourcemap.html#section-8)

    wrapper = "      (function(script, options) {\n        try {\n          return CoffeeScript.compile(script, options);\n        } catch (err) {\n          if (err instanceof SyntaxError && err.location) {\n            throw new SyntaxError([options.filename, err.location.first_line + 1, err.location.first_column + 1].join(\":\") + \": \" + err.message)\n          } else {\n            throw err;\n          }\n        }\n      })\n    WRAPPER\n\n    file_path = \"var sourcePath='\#{pathname.basename}';\\n\"\n    ret = Source.context.call(wrapper, file_path + script, options)\n\n    puts file_path\n    coffee_file.open('w') {|f| f.puts script }\n    map_file.open('w')    {|f| f.puts ret[\"v3SourceMap\"]}\n\n    comment = \"//# sourceMappingURL=/\#{map_file.relative_path_from(Rails.root.join(\"public\"))}\\n\"\n    # This will add file source that can be used in directives or controllers\n    return file_path + ret['js'] + comment\n  end\n\nend\n"