gulpfile.babel.js

import gulp from 'gulp';
import path from 'path';
import del from 'del';
import runSequence from 'run-sequence';
import babelCompiler from 'babel-core/register';
import gulpLoadPlugins from 'gulp-load-plugins';

const plugins = gulpLoadPlugins();

const paths = {
    js: ['./**/*.js', '!dist/**', '!node_modules/**', '!test/**', '!coverage/**', '!log/**'],
    files: ['./package.json', './.gitignore'],
    tests: {
        integration: './test/integration/**/*.js',
        unit: './test/unit/**/*.js'
    },
    build: 'dist'
};

const opt = {
    dir: './coverage',
    reporters: [ 'lcov', 'json', 'text', 'text-summary', 'clover'],
    reportOpts: { dir: './coverage' },
};

gulp.task('help', plugins.taskListing);

gulp.task('clean', () => del(['dist/**', '!dist']));

gulp.task('copy', () =>
    gulp.src(paths.files)
        .pipe(plugins.newer(paths.build))
        .pipe(gulp.dest(paths.build))
);

gulp.task('babel', () =>
    gulp.src([...paths.js, '!gulpfile.babel.js'], { base: '.' })
        .pipe(plugins.newer(paths.build))
        .pipe(plugins.sourcemaps.init())
        .pipe(plugins.babel())
        .pipe(plugins.sourcemaps.write('.', {
            includeContent: false,
            sourceRoot(file) {
                return path.relative(file.path, __dirname)
            }
        }))
        .pipe(gulp.dest(paths.build))
);

gulp.task('nodemon', ['copy', 'babel'], () =>
    plugins.nodemon({
        script: path.join(paths.build, 'index.js'),
        ignore: ['node_modules/**/*.js', 'dist/**/*.js'],
        tasks: ['copy', 'babel']
    })
    .on('restart', () => console.log('>> node restart'))
);

gulp.task('test', () =>
    gulp.src(['dist/app/**.*js'])
        .pipe(plugins.plumber())
        .pipe(plugins.istanbul())
        .pipe(plugins.istanbul.hookRequire())
        .on('finish', () =>
            gulp.src('./test/**/*.js')
                .pipe(plugins.mocha({
                    reporter: 'spec',
                    ui: 'bdd',
                    recursive: true,
                    compilers: {
                        js: babelCompiler
                    }
                }))
                .pipe(plugins.istanbul.writeReports(opt))
                .pipe(plugins.istanbul.enforceThresholds({ thresholds: { global: 10 } }))
                .on('end', () => console.log('>>Finished Running Tests'))
                .pipe(plugins.exit())
        )
);

gulp.task('serve', ['clean'], () => runSequence('nodemon'));

gulp.task('default', ['clean'], () => {
    runSequence(['copy', 'babel']);
});