Created
April 12, 2013 16:29
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Register Dart with the asset pipeline.
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module Dart | |
module Rails | |
class Railtie < ::Rails::Engine | |
initializer :setup_dart_rails do |app| | |
app.assets.register_engine '.dart', Dart::Rails::Template | |
end | |
end | |
end | |
end |
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require 'fileutils' | |
require 'open3' | |
module Dart | |
module Rails | |
class Template < Tilt::Template | |
include TiltCompat | |
def render(scope, locals, &block) | |
@data = dart(@file) | |
end | |
protected | |
def compile_target | |
@compile_target ||= File.open(File.join(cache_dir, 'output.js'), 'w') | |
end | |
def cache_dir | |
@cache_dir ||= ::Rails.root.join('tmp/cache/dart-rails').tap do |dir| | |
FileUtils.rm_r(dir) if Dir.exist?(dir) | |
Dir.mkdir(dir) | |
end | |
end | |
def dart(file, options = {}) | |
bin = ENV['DART2JS_BIN'] || '/usr/bin/env dart2js' | |
command = "#{bin} --out=#{compile_target.path} #{file}" | |
stdin, stdout, stderr = Open3.popen3(command) | |
if error = stdout.gets | |
raise error | |
end | |
stdin.close | |
stdout.close | |
stderr.close | |
`cat #{compile_target.path}` | |
end | |
def logger | |
::Rails.logger | |
end | |
end | |
end | |
end |
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module Dart | |
module Rails | |
module TiltCompat | |
class << self | |
def engine_initialized? | |
true | |
end | |
end | |
def prepare | |
true | |
end | |
end | |
end | |
end |
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