const { build } = require('./gulpfile');


module.exports = {
	defaultProjectFolder: 'src',
	commands: {
		deploy: {
			projectFolder: 'dist',
			beforeExecuting: async options => {
				await build();
				return options;
			},
		},
		validate: {
			projectFolder: 'dist',
			beforeExecuting: async options => {
				await build();
				options.arguments.server = true;
				return options;
			},
		},
	},
};

gulpfile.js

const { src, dest, series } = require('gulp');
var ts = require('gulp-typescript');
const del = require('del');
var jest = require('jest');

function test() {
	return jest.runCLI(
		{
			transform: {
				'^.+\\.jsx?$': 'babel-jest',
				'^.+\\.tsx?$': 'ts-jest',
			},
			testRegex: '(/__tests__/tests/.*|(\\.|/)(test|spec))\\.tsx?$',
			moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
			preset: 'ts-jest',
		},
		[process.cwd()]
	);
}

function clean() {
	console.log('Running clean');
	return del(['dist/**', '!dist']);
}

function copy() {
	console.log('Running copy');
	return new Promise((resolve, reject) => {
		var paths = ['src/**/*.xml'];
		src(paths)
			.pipe(dest('dist/'))
			.on('end', resolve)
			.on('error', reject);
	});
}

function buildTypeScript() {
	console.log('Transpiling TypeScript to JS');
	return new Promise((resolve, reject) => {
		var tsProject = ts.createProject('tsconfig.json');
		var tsResult = tsProject.src().pipe(tsProject());
		tsResult.js
			.pipe(dest('dist'))
			.on('end', () => {
				console.log('Transpiling done!');
				resolve();
			})
			.on('error', reject);
	});
}

function build() {
	console.log('Building project...');
	return new Promise((resolve, reject) => {
		try {
			series(test, clean, copy, buildTypeScript)(_ => {
				console.log('Building complete');
				resolve();
			});
		} catch (error) {
			console.log(error);
			reject(error);
		}
	});
}

module.exports = {
	build,
    test,
    clean
};

gulp

del