gulpfile.js

'use strict';
const gulp = require('gulp');
const webpack = require('webpack');
const webpackStream = require('webpack-stream');
const babel = require('gulp-babel');
const filter = require('gulp-filter');
const sass = require('gulp-sass');
const concat = require('gulp-concat');
const replace = require('gulp-replace');
const rename = require('gulp-rename');
const cleanCSS = require('gulp-clean-css');
const eslint = require('gulp-eslint');
const insert = require('gulp-insert');
const template = require('gulp-template');
const packageJson = require('./package.json');

// Clean lib folder.
gulp.task('clean', require('del').bind(null, ['dist', 'lib']));

// ESLint
gulp.task('eslint', function eslintTask() {
  return gulp.src(['./src/**/*.js', '!./src/**/*.spec.js'])
    .pipe(eslint())
    .pipe(eslint.format())
    .pipe(eslint.failAfterError());
});

// Run babel on source code.
gulp.task('babel', gulp.series('eslint', function babelTask() {
  const FormioFilter = filter('**/Formio.js', { restore: true });
  return gulp.src(['./src/**/*.js', '!./src/**/*.spec.js'])
    .pipe(FormioFilter)
    .pipe(replace('---VERSION---', packageJson.version))
    .pipe(FormioFilter.restore)
    .pipe(babel())
    .pipe(gulp.dest('lib'));
}));

// Run babel without linting
gulp.task('babel-nolint', gulp.series(function babelTask() {
  return gulp.src(['./src/**/*.js', '!./src/**/*.spec.js'])
    .pipe(babel())
    .pipe(gulp.dest('lib'));
}));

// Compile all *.ejs files to pre-compiled templates and append *.js to the filename.
gulp.task('templates', () =>
  gulp.src('./src/**/*.ejs')
    .pipe(template.precompile({
      evaluate: /\{%([\s\S]+?)%\}/g,
      interpolate: /\{\{([\s\S]+?)\}\}/g,
      escape: /\{\{\{([\s\S]+?)\}\}\}/g,
      variable: 'ctx'
    }))
    .pipe(insert.prepend('Object.defineProperty(exports, "__esModule", {\n' +
      '  value: true\n' +
      '});\n' +
      'exports.default='))
    .pipe(rename({
      extname: '.ejs.js'
    }))
    .pipe(gulp.dest('lib'))
);

// Move font-awesome fonts into dist folder.
gulp.task('builder-fonts', function builderFonts() {
  return gulp.src('node_modules/font-awesome/fonts/*').pipe(gulp.dest('dist/fonts'));
});

// Generate styles
const compileStyles = (styles, file) => {
  const sassFilter = filter('**/*.scss', { restore: true });
  return gulp.src(styles)
    .pipe(sassFilter)
    .pipe(sass().on('error', sass.logError))
    .pipe(sassFilter.restore)
    .pipe(concat(`${file}.css`))
    .pipe(replace(/\.\.\/\.\.\/icons\/\/?/g, 'icons/'))
    /* eslint-disable quotes */
    .pipe(replace('icons/cross.svg', `'data:image/svg+xml;charset=utf8,%3Csvg width="21" height="21" viewBox="0 0 21 21" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="%23FFF" fill-rule="evenodd"%3E%3Cpath d="M2.592.044l18.364 18.364-2.548 2.548L.044 2.592z"/%3E%3Cpath d="M0 18.364L18.364 0l2.548 2.548L2.548 20.912z"/%3E%3C/g%3E%3C/svg%3E'`))
    .pipe(replace('icons/cross-inverse.svg', `'data:image/svg+xml;charset=utf8,%3Csvg width="21" height="21" viewBox="0 0 21 21" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="%23000" fill-rule="evenodd"%3E%3Cpath d="M2.592.044l18.364 18.364-2.548 2.548L.044 2.592z"/%3E%3Cpath d="M0 18.364L18.364 0l2.548 2.548L2.548 20.912z"/%3E%3C/g%3E%3C/svg%3E'`))
    /* eslint-enable quotes */
    .pipe(replace(/\.\.\/fonts\/\/?/g, 'fonts/'))
    .pipe(gulp.dest('dist'))
    .pipe(rename(`${file}.min.css`))
    .pipe(cleanCSS({ compatibility: 'ie8' }))
    .pipe(gulp.dest('dist'));
};
gulp.task('styles-form', function formStyles() {
  return compileStyles([
    './node_modules/flatpickr/dist/flatpickr.min.css',
    './node_modules/choices.js/public/assets/styles/choices.min.css',
    './node_modules/dialog-polyfill/dialog-polyfill.css',
    './src/sass/formio.form.scss'
  ], 'formio.form');
});
gulp.task('styles-builder', function builderStyles() {
  return compileStyles([
    './node_modules/flatpickr/dist/flatpickr.min.css',
    './node_modules/choices.js/public/assets/styles/choices.min.css',
    './node_modules/dialog-polyfill/dialog-polyfill.css',
    './node_modules/dragula/dist/dragula.css',
    './src/sass/formio.form.scss',
    './src/sass/formio.form.builder.scss'
  ], 'formio.builder');
});
gulp.task('styles-full', gulp.series('builder-fonts', function fullStyles() {
  return compileStyles([
    './node_modules/flatpickr/dist/flatpickr.min.css',
    './node_modules/choices.js/public/assets/styles/choices.min.css',
    './node_modules/dialog-polyfill/dialog-polyfill.css',
    './node_modules/dragula/dist/dragula.css',
    './node_modules/font-awesome/css/font-awesome.css',
    './src/sass/formio.form.scss',
    './src/sass/formio.form.builder.scss'
  ], 'formio.full');
}));

// Script builds.
const webpackDev = require('./config/webpack.dev');
const webpackProd = require('./config/webpack.prod');
const buildDev = (input, output) => webpackStream(webpackDev(input, output), webpack).pipe(gulp.dest('dist'));
const buildProd = (input, output) => webpackStream(webpackProd(input, output), webpack).pipe(gulp.dest('dist'));
const build = (input, output) => {
  const prodFile = output.replace(/\.js$/, '.min.js');
  gulp.task(output, () => buildDev(input, output));
  gulp.task(prodFile, () => buildProd(input, prodFile));
  return gulp.parallel(output, prodFile);
};
gulp.task('scripts-formio', build('Formio.js', 'formio.js'));
gulp.task('scripts-utils', build('utils/utils.js', 'formio.utils.js'));
gulp.task('scripts-full', build('index.js', 'formio.full.js'));
gulp.task('scripts-form', build('formio.form.js', 'formio.form.js'));
gulp.task('formio.embed.min.js', () => buildProd('formio.embed.js', 'formio.embed.min.js'));
gulp.task('formio.embed.js', () =>
  gulp.src('./dist/formio.embed.min.js')
    .pipe(rename('formio.embed.js'))
    .pipe(gulp.dest('dist')));
gulp.task('scripts-embed', gulp.series('formio.embed.min.js', 'formio.embed.js'));
gulp.task('scripts-contrib', build('contrib/index.js', 'formio.contrib.js'));

gulp.task('jquery', () => gulp.src('./node_modules/jquery/dist/**/*.*').pipe(gulp.dest('./app/jquery')));
gulp.task('fontawesome', () => gulp.src('./node_modules/font-awesome/**/*.*').pipe(gulp.dest('./app/fontawesome')));
gulp.task('bootstrap', () => gulp.src('./node_modules/bootstrap/dist/**/*.*').pipe(gulp.dest('./app/bootstrap')));
gulp.task('bootswatch', () => gulp.src('./node_modules/bootswatch/**/*.*').pipe(gulp.dest('./app/bootswatch')));

// Copy the version and dependencies into the distribution package.json file.
gulp.task('package-version', function() {
  const pkg = require('./package.json');
  return gulp.src([
    'src/package.json'
  ])
    .pipe(replace(/"version": ""/, `"version": "${pkg.version}"`))
    .pipe(replace(/"dependencies": {}/, `"dependencies": ${JSON.stringify(pkg.dependencies)}`))
    .pipe(gulp.dest('lib'));
});

// Copy over the dist folder into the lib folder.
gulp.task('dist', () => gulp.src(['dist/**/*.*']).pipe(gulp.dest('lib/dist')));

// Copy over the types folder and index.d.ts into the lib folder.
gulp.task('types-index', () => gulp.src(['index.d.ts']).pipe(gulp.dest('lib')));
gulp.task('types-folder', () => gulp.src(['types/**/*.*']).pipe(gulp.dest('lib/types')));
gulp.task('types', gulp.parallel('types-index', 'types-folder'));

// Copy over the readme and changelog files
gulp.task('readme', () => gulp.src(['README.md', 'Changelog.md']).pipe(gulp.dest('lib')));

// Watch for changes.
gulp.task('watch', () => gulp.watch(['./src/*.js', './src/**/*.js'], gulp.series('scripts-full')));

// Copy over the moment-timezones to the resource folder.
gulp.task('timezones', () => gulp.src('./node_modules/moment-timezone/data/packed/latest.json').pipe(gulp.dest('./resources')));

// Create a new build.
gulp.task('build', gulp.series(
  'clean',
  'babel',
  'templates',
  'package-version',
  gulp.parallel(
    'jquery',
    'timezones',
    'fontawesome',
    'bootstrap',
    'bootswatch'
  ),
  gulp.parallel(
    'styles-form',
    'styles-builder',
    'styles-full',
    'scripts-formio',
    'scripts-utils',
    'scripts-embed',
    'scripts-contrib',
    'scripts-form',
    'scripts-full'
  ),
  'dist',
  'types',
  'readme'
));

// Create a new build (scripts only)
gulp.task('rebuild-scripts', gulp.series(
  'babel-nolint',
  gulp.parallel(
    'scripts-formio',
    'scripts-utils',
    'scripts-embed',
    'scripts-contrib',
    'scripts-form',
    'scripts-full'
  ),
  'dist',
  'types'
));

// Watch for changes.
gulp.task('watch-rebuild', () => gulp.watch(['./src/*.js', './src/**/*.js'], gulp.series('rebuild-scripts')));

// Default task. Build and watch.
gulp.task('default', gulp.series('babel', 'scripts-full', 'watch'));