gulpfile.js

'use strict';

var gulp = require('gulp');
const git = require('gulp-git');
const replace = require('gulp-replace');
const path = require('path');
const {exec} = require('child_process');
const fs = require('fs-extra');

// build the docs (including demos)
gulp.task('build:clean', () => {
  return fs.remove(path.join(__dirname, 'build'));
});

gulp.task('build:copy-sources:bower', () => {
  return gulp.src(['bower_components/**/*'])
    .pipe(gulp.dest('build/bower_components'));
});

gulp.task('build:copy-sources:vaadin-router', () => {
  return gulp.src(['dist/vaadin-router.umd.js'])
    .pipe(gulp.dest('build/bower_components/vaadin-router/dist'));
});

gulp.task('build:copy-sources', gulp.series(
  'build:clean',
  gulp.parallel('build:copy-sources:bower', 'build:copy-sources:vaadin-router')
));

gulp.task('docs:clean', () => {
  return fs.remove(path.join(__dirname, 'docs'));
});

gulp.task('docs:copy', async() => {
  // docs
  await Promise.all([
    fs.copy(
      path.join(__dirname, 'index.html'),
      path.join(__dirname, 'build', 'bower_components', 'vaadin-router', 'index.html')),
    fs.copy(
      path.join(__dirname, 'analysis.json'),
      path.join(__dirname, 'build', 'bower_components', 'vaadin-router', 'analysis.json')),
    fs.copy(
      path.join(__dirname, 'polymer.json'),
      path.join(__dirname, 'build', 'polymer.json'))
  ]);

  await polymerBuild();

  await fs.copy(
    path.join(__dirname, 'build', 'build', 'es5-bundled', 'bower_components'),
    path.join(__dirname, 'docs'));

  // demo
  await Promise.all([
    fs.copy(
      path.join(__dirname, 'demo'),
      path.join(__dirname, 'build', 'bower_components', 'vaadin-router', 'demo')),
    fs.copy(
      path.join(__dirname, 'demo', 'polymer.json'),
      path.join(__dirname, 'build', 'polymer.json'))
  ]);

  await polymerBuild();

  await fs.copy(
    path.join(__dirname, 'build', 'build', 'es5-bundled', 'bower_components', 'vaadin-router', 'demo'),
    path.join(__dirname, 'docs', 'vaadin-router', 'demo'));

  // demo iframe
  await fs.copy(
    path.join(__dirname, 'demo', 'polymer.iframe.json'),
    path.join(__dirname, 'build', 'polymer.json'));

  await polymerBuild();

  await fs.copy(
    path.join(__dirname, 'build', 'build', 'es5-bundled', 'bower_components', 'vaadin-router', 'demo', 'iframe.html'),
    path.join(__dirname, 'docs', 'vaadin-router', 'demo', 'iframe.html'));

  // HTML imports for the code splitting demos
  await fs.copy(
    path.join(__dirname, 'bower_components', 'polymer', 'lib', 'utils', 'import-href.html'),
    path.join(__dirname, 'docs', 'polymer', 'lib', 'utils', 'import-href.html'));

  await fs.copy(
    path.join(__dirname, 'bower_components', 'polymer', 'lib', 'utils', 'boot.html'),
    path.join(__dirname, 'docs', 'polymer', 'lib', 'utils', 'boot.html'));
});

gulp.task('docs', gulp.series('docs:clean', 'build:copy-sources', 'docs:copy'));

function polymerBuild() {
  return new Promise((resolve, reject) => {
    exec(
      'polymer build',
      {cwd: path.join(__dirname, 'build')},
      (error, stdout, stderr) => {
        if (error) {
          reject(error);
        } else {
          resolve();
        }
      });
  });
}

gulp.task('version:update', function() {
  // Should be run from 'preversion'
  // Assumes that the old version is in package.json and the new version in the `npm_package_version` environment variable
  const oldversion = require('./package.json').version;
  const newversion = process.env.npm_package_version;
  if (!oldversion) {
    throw new 'No old version found in package.json';
  }
  if (!newversion) {
    throw new 'New version must be given as a npm_package_version environment variable.';
  }
  return gulp.src(['src/router-meta.js'])
    .pipe(replace(oldversion, newversion))
    .pipe(gulp.dest('src'))
    .pipe(git.add());
});