gulpfile.babel.js

'use strict';

const gulp = require('gulp'),
    source = require('vinyl-source-stream'),
    rename = require('gulp-rename'),
    browserify = require('browserify'),
    glob = require('glob'),
    es = require('event-stream'),
    del = require('del'),
    wrapper = require('gulp-wrapper'),
    bufferify = require('vinyl-buffer'),
    bump = require('gulp-bump'),
    babelify = require('babelify');

const distFolder = './dist';
const sourceFiles = './src/lendy/**/*.js';

const header = file => {
    const fileName = file.path.replace(__dirname, '').replace('/src/lendy/', '').replace('.js', '');

    const pkg = require('./package.json');

    return [
        '// ==UserScript==',
        `// @name           ${pkg.name} => ${fileName}`,
        `// @version        ${pkg.version}`,
        `// @timestamp      ${new Date().toISOString()}`,
        `// @author         ${pkg.author}`,
        `// @match          https://lendy.co.uk/${fileName}`,
        '// @homepageURL    https://github.com/bbonanno/saving-stream-enhancer',
        `// @downloadURL    https://raw.githubusercontent.com/bbonanno/saving-stream-enhancer/master/dist/lendy/${fileName}.user.js`,
        '// @require        http://code.jquery.com/jquery-latest.min.js',
        '// @require        https://raw.githubusercontent.com/christianbach/tablesorter/master/jquery.tablesorter.min.js',
        '// ==/UserScript==',
        '\n'
    ].join('\n');
};

gulp.task('clean', function (cb) {
    return del([distFolder], cb);
});

gulp.task('dist', ['clean', 'bump'], function (done) {
    glob(sourceFiles, function (err, files) {
        if (err) done(err);

        const tasks = files.map(function (entry) {
            return browserify({entries: [entry]})
                .transform('babelify', {presets: ['es2015']})
                .bundle()
                .pipe(source(entry))
                .pipe(bufferify())
                .pipe(wrapper({
                    header: header
                }))
                .pipe(rename(file => {
                    file.dirname = file.dirname.replace('src/', '');
                    file.extname = '.user.js';
                }))
                .pipe(gulp.dest(distFolder));
        });
        es.merge(tasks).on('end', done);
    })
});

gulp.task('default', ['dist']);

gulp.task('watch', function () {
    gulp.watch(sourceFiles, ['dist']);
});

gulp.task('bump', function () {
    gulp.src('./package.json')
        .pipe(bump())
        .pipe(gulp.dest('./'));
});