Class: BrowserifyRails::DirectiveProcessor

Inherits:
Sprockets::DirectiveProcessor
  • Object
show all
Defined in:
lib/browserify-rails/directive_processor.rb

Defined Under Namespace

Classes: BrowserifyError, ModuleDepsError

Constant Summary collapse

BROWSERIFY_CMD = 
'./node_modules/.bin/browserify'.freeze
MODULE_DEPS_CMD = 
'./node_modules/.bin/module-deps'.freeze
COFFEEIFY_PATH = 
'./node_modules/coffeeify'.freeze

Instance Method Summary collapse

Instance Method Details

#commonjs_module?(data) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/browserify-rails/directive_processor.rb', line 49

def commonjs_module?(data)
  data.to_s.include?('module.exports') || data.to_s.include?('require')
end

#evaluate(context, locals, &block) ⇒ Object 



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# File 'lib/browserify-rails/directive_processor.rb', line 16

def evaluate(context, locals, &block)
  super

  if commonjs_module?(data)
    browserify_cmd = File.join(context.environment.root, BROWSERIFY_CMD)
    module_deps_cmd = File.join(context.environment.root, MODULE_DEPS_CMD)

    raise ArgumentError, "#{browserify_cmd} could not be found. Please run npm install." unless File.exist?(browserify_cmd)
    raise ArgumentError, "#{module_deps_cmd} could not be found. Please run npm install." unless File.exist?(module_deps_cmd)

    deps = JSON.parse(run_command("#{module_deps_cmd} #{pathname}"))
    deps.each do |dep|
      path = File.basename(dep['id'], context.environment.root)
      next if path == File.basename(pathname)

      if path =~ /<([^>]+)>/
        path = $1
      else
        path = "./#{path}" unless relative?(path)
      end

      context.depend_on_asset(path)
    end

    params = "-d"
    params += " -t coffeeify --extension='.coffee'" if File.directory?(COFFEEIFY_PATH)

    run_command("#{browserify_cmd} #{params} #{pathname}")
  else
    data
  end
end

#run_command(command) ⇒ Object 



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# File 'lib/browserify-rails/directive_processor.rb', line 53

def run_command(command)
  stdin, stdout, stderr = Open3.popen3("#{command}")
  begin
    result = stdout.read
    result_error = stderr.read.strip
    if result_error.empty?
      result
    else
      raise ModuleDepsError, result_error
    end
  ensure
    stdin.close
    stdout.close
    stderr.close
  end
end