Nativefier/gulp/build.js

import gulp from 'gulp';
import PATHS from './helpers/src-paths';

import del from 'del';
import runSequence from 'run-sequence';

gulp.task('build', callback => {
    runSequence('clean', ['build-cli', 'build-app', 'build-tests'], callback);
});

gulp.task('clean', callback => {
    del(PATHS.CLI_DEST).then(() => {
        del(PATHS.APP_DEST).then(() => {
            del(PATHS.TEST_DEST).then(() => {
                callback();
            });
        });
    });
});