gulpfile.js

'use strict';

const pkg = require('./package'),
	gulp = require('gulp'),
	gulpif = require('gulp-if'),
	gutil = require('gulp-util'),
	sync = require('gulp-sync')(gulp).sync,
	eslint = require('gulp-eslint'),
	mocha = require('gulp-mocha'),
	istanbul = require('gulp-istanbul'),
	mkdirp = require('mkdirp'),
	path = require('path'),
	fs = require('fs'),
	del = require('del'),
	_ = require('lodash'),
	argv = require('minimist')(process.argv.slice(2), {
		boolean: ['debug', 'bail'],
		string: ['file', 'grep'],
		alias: {
			file: 'f',
			grep: 'g',
			debug: 'd',
			bail: 'b'
		}
	});

// Print banner
gutil.log([
	fs.readFileSync('.banner', 'utf8'),
	`${pkg.name} v${pkg.version}`,
	pkg.description
].map(_.unary(gutil.colors.green)).join('\n'));

argv.debug && gutil.log('Paremeters:', argv);

function initTestMode() {
	global.testMode = 'unit';
	process.env.JUNIT_REPORT_PATH = 'build/test/results/report.xml'; // eslint-disable-line
	process.env.JUNIT_REPORT_STACK = true; // eslint-disable-line
	global.requireLib = function(libmodule) {
		return require(path.resolve(__dirname, 'lib', libmodule || './'));
	};
}

gulp.task('clean', (done) => {
	del(['build']).then((paths) => {
		argv.debug && paths.length && gutil.log('Deleted files/folders:\n', paths.join('\n'));
		done();
	});
});

gulp.task('lint', () => {
	const src = argv.file || [
		'**/*.js',
		'!node_modules/**/*',
		'!build/**/*'
	];
	argv.debug && gutil.log('Running code lint on:', src);
	return gulp.src(src)
		.pipe(eslint())
		.pipe(gulpif(!argv.bail, eslint.format()))
		.pipe(gulpif(!argv.bail, eslint.failAfterError()))
		.pipe(gulpif(argv.bail, eslint.failOnError()));
});

gulp.task('test', () => {
	const testSrc = argv.file || 'test/**/*.test.js';
	argv.debug && gutil.log('Running unit tests for:', testSrc);
	initTestMode();
	return gulp.src(testSrc)
		.pipe(mocha({
			reporter: 'mocha-jenkins-reporter',
			debug: argv.debug,
			grep: argv.grep,
			bail: argv.bail
		}));
});

gulp.task('test-cov', (done) => {
	mkdirp.sync('./build/test/results');
	mkdirp.sync('./build/test/coverage');
	gulp.src('lib/**/*.js')
		.pipe(istanbul({
			includeUntested: true
		}))
		.pipe(istanbul.hookRequire())
		.on('finish', () => {
			const testSrc = argv.file || 'test/**/*.test.js';
			initTestMode();
			argv.debug && gutil.log('Running instrumented unit tests for:', testSrc);
			gulp.src(testSrc)
				.pipe(mocha({
					reporter: 'mocha-jenkins-reporter',
					debug: argv.debug,
					grep: argv.grep,
					bail: argv.bail
				}))
				.pipe(istanbul.writeReports({
					dir: './build/test/coverage',
					reporters: ['lcov', 'json', 'text', 'text-summary', 'cobertura'],
					reportOpts: { dir: './build/test/coverage' }
				}))
				.on('end', done);
		});
});

gulp.task('default', sync(['clean', 'lint', 'test']));
gulp.task('ci', sync(['clean', 'lint', 'test-cov']));