gulpfile.js

let gulp  = require('gulp'),
    babel = require('gulp-babel'),
    mocha = require('gulp-mocha'),
    del   = require('del')


gulp.task('clean:dist', (cb) => { del(['dist'], cb) })

gulp.task('clean:tests', (cb) => { del(['tests_compiled'], cb) })

gulp.task('clean', ['clean:dist', 'clean:tests'])



gulp.task('build:dist', ['clean'], () =>
    gulp.src('src/**/*.js')
        .pipe(babel({blacklist: ["spec.functionName"]}))
        .pipe(gulp.dest('dist')))

gulp.task('build:tests', ['clean'], () =>
    gulp.src('tests/*.js')
        .pipe(babel({blacklist: ["spec.functionName"]}))
        .pipe(gulp.dest('tests_compiled')))

gulp.task('build:perf', ['clean'], () =>
    gulp.src('perf/*.js')
        .pipe(babel({blacklist: ["spec.functionName"]}))
        .pipe(gulp.dest('perf_compiled')))

gulp.task('build', ['build:dist', 'build:tests', 'build:perf'])



// gulp.task('test', () =>
//     gulp.src('tests/**/*.js', {read: false})
//         .pipe(mocha()))


// gulp.task('watch', () =>
//     gulp.watch(['src/**/*.js', 'tests/**/*.js'], ['build', 'test']))


gulp.task('default', ['clean', 'build'])