Gruntfile.js

/*jshint expr: true, strict: false*/
module.exports = function(grunt) {

  var ASSETS_DIR = './public/'
    , STYLE_DIR = ASSETS_DIR + 'css/'
    , LESS_DIR = ASSETS_DIR + 'less/'
    , JS_DIR = ASSETS_DIR + 'js/'
    , TEST_DIR = 'tests/'
    , cssF = STYLE_DIR + 'style.css'
    , lessF = LESS_DIR + 'style.less'
    , frontendF = JS_DIR + '**/*.js'
    , backendF = ['./*.js', './config/*.js']
    , testF = TEST_DIR + '_*.js'
    , lesscmd = 'node ./node_modules/.bin/lessc --source-map-map-inline --source-map --source-map-rootpath=../less/ ' +
      lessF + ' ' + cssF
    , karmaCmd = 'node ./node_modules/.bin/karma config/karma.conf.js'
    , coverageCmd = 'node ./node_modules/.bin/karma config/test.coverage.js'
    , config = {
        pkg: grunt.file.readJSON('package.json')
      , exec: {
          less: lesscmd
        , karma: karmaCmd
        , coverage: coverageCmd
        }
      , clean: ['public/compiled']
      , jshint: {
          options: {
            jshintrc: true
          }
        , frontend: {
            files: {
              src: [frontendF]
            }
          }
        , backend: {
            files: {
              src: [backendF]
            }
          }
        , test: {
            files: {
              src: [testF]
            }
          }
        }
      , jscs: {
          frontend: {
            files: {
              src: frontendF
            }
          }
        , backend: {
            files: {
              src: backendF
            }
          }
        , test: {
            files: {
              src: testF
            }
          }
        , all: {
            files: {
              src: [frontendF, backendF, testF]
            }
          }
        , options: {
            config: '.jscsrc'
          , fix: false
          , verbose: true
          }
        }
      , watch: {}
      };
  grunt.initConfig(config);
  grunt.loadNpmTasks('grunt-exec');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-clean');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-jscs');
  grunt.registerTask('verify', ['jshint']);
  grunt.registerTask('fix-js', function() {
    config.jscs.options.fix = true;
    grunt.task.run('jscs:all');
  });
  grunt.registerTask('_watch', 'config a watch command', function() {
    config.watch = {
      backend: {
        files: backendF
      , tasks: ['jshint:backend', 'jscs:backend']
      , options: {
          spawn: false
        }
      }
    , frontend: {
        files: frontendF
      , tasks: ['jshint:frontend', 'jscs:frontend']
      , options: {
          spawn: true
        , atBegin: true
        }
      }
    , test: {
        files: testF
      , tasks: ['jshint:test', 'jscs:test']
      }
    , less: {
        files: [
          LESS_DIR + '*.less'
        , LESS_DIR + '**/*.less'
        , LESS_DIR + '**/**.less'
        ]
      , tasks: ['exec:less']
      , options: {
          livereload: false
        , livereloadOnError: false
        , spawn: false
        , atBegin: true
        }
      }
    , livereload: {
        options: {livereload: true}
      , files: [cssF]
      }
    };
    grunt.task.run('watch');
  });
  grunt.registerTask('default', ['_watch']);
};