closure linter with Grunt

Gruntfile.js

shell: {
  closure_linter: '../tools/js/gjslinter/closure_linter',
  src: ['app/scripts/controllers',
        'app/scripts/services app/scripts/app.js'],
  clean_deps: {
    command: 'rm -f <%= closureDepsWriter.zwoup.dest %>',
    options: {
      stdout: true
    }
  },
  fixstyle: {
      command: '<%= shell.closure_linter %>/fixjsstyle.py -r' +
               '<%= shell.src.join(\' \') %> --strict',
      options: {
        stdout: true
      }
  },
  checkstyle: {
    command: '<%= shell.closure_linter %>/gjslint.py -r '+
             '<%= shell.src.join(\' \') %> --strict',
    options: {
      stdout: true
    }
  }
}