Gulp Error Reporting with Jshint, Gulp-Notify, and Livereload

gulp-error-reporting

/**
* init gulp plugins
*/
var gulp = require('gulp');
var plugins = require('gulp-load-plugins')();
var map = require('map-stream');
var events = require('events');
var emitter = new events.EventEmitter();
var path = require('path');
var gutil = require('gulp-util');
var currentTask = '';

/**
* custom reporter for jshint-stylish
*/
var jsHintErrorReporter = map(function (file, cb) {
    if (!file.jshint.success) {
        file.jshint.results.forEach(function (err) {
            if (err) {
                var msg = [
                    path.basename(file.path),
                    'LINE: ' + err.error.line,
                    'ERROR: ' + err.error.reason
                ];
                // Emit this error event
                emitter.emit('error', new Error(msg.join(" - ")));
            }
        });
    }
    cb(null, file);
});

/**
* error reporter object (for plugins)
*/
var reportError = function (error) {

    var lineNumber = (error.lineNumber) ? 'LINE ' + error.lineNumber + ' -- ' : '';
    var pluginName = (error.plugin) ? ': ['+error.plugin+']' : '['+currentTask+']';

    plugins.notify({
        title: 'Task Failed '+ pluginName,
        message: lineNumber + 'See console.'
    }).write(error);

    gutil.beep();

    var report = '';
    var chalk = gutil.colors.white.bgRed;

    report += chalk('TASK:') + pluginName+'\n';
    report += chalk('ERROR:') + ' ' + error.message + '\n';
    if (error.lineNumber) { report += chalk('LINE:') + ' ' + error.lineNumber + '\n'; }
    if (error.fileName) { report += chalk('FILE:') + ' ' + error.fileName + '\n'; }

    console.error(report);

    this.emit('end');
}

/**
* sass to css
*/
gulp.task('sass', function () {
    currentTask = 'sass';
    return gulp.src('styles/sass/screen.scss')
    .pipe(plugins.plumber({
        errorHandler: reportError
    }))
    .pipe(plugins.sass())
    .pipe(gulp.dest('styles'))
    .pipe(plugins.livereload());
});

/**
* jshints js/modules/*.js
*/
gulp.task('jshint', function() {
    return gulp.src(['js/modules/**/*.js'])
    .pipe(plugins.jshint('.jshintrc'))
    .pipe(plugins.jshint.reporter('jshint-stylish'))
    .pipe(jsHintErrorReporter)
        .on('error', plugins.notify.onError(function (error) {
            return error.message;
        }
    ))
    .pipe(plugins.livereload());
});

/**
* gulp watch
*/
gulp.task('watch', function() {
    plugins.livereload.listen();
    gulp.watch('styles/sass/**/**/*.scss', ['sass']);
    gulp.watch(['js/modules/*.js'], ['jshint']);
});