bin/build-site.js

#!/usr/bin/env node

'use strict';

var http_server = require('http-server');
var bluebird = require('bluebird');
var fs = bluebird.promisifyAll(require('fs'));
var watchGlob = require('watch-glob');
var replace = require('replace');
var exec = require('child-process-promise').exec;
var mkdirp = bluebird.promisify(require('mkdirp'));

var POUCHDB_CSS = __dirname + '/../docs/static/css/pouchdb.css';
var POUCHDB_LESS = __dirname + '/../docs/static/less/pouchdb/pouchdb.less';

process.chdir('docs');

function checkJekyll() {
  return exec('gem list jekyll -i').then(function (result) {
    if (!/true/.test(result.stdout)) {
      throw new Error('You need to do: gem install jekyll');
    }
  });
}

function buildCSS() {
  return mkdirp(__dirname + '/../docs/static/css').then(function () {
    var cmd = __dirname + '/../node_modules/less/bin/lessc ' + POUCHDB_LESS;
    return exec(cmd);
  }).then(function (child) {
    return fs.writeFileAsync(POUCHDB_CSS, child.stdout);
  }).then(function () {
    console.log('Updated: ', POUCHDB_CSS);
  });
}

function buildJekyll(path) {
  // Dont rebuild on website artifacts being written
  if (path && /^_site/.test(path.relative)) {
    return;
  }
  return exec('jekyll build').then(function () {
    console.log('=> Rebuilt jekyll');
    return highlightEs6();
  }).then(function () {
    console.log('=> Highlighted ES6');
  });
}

function highlightEs6() {
  var path = require('path').resolve(__dirname, '../docs/_site');

  // TODO: this is a fragile and hacky way to get
  // 'async' and 'await' to highlight correctly
  // in this blog post.
  replace({
    regex: '<span class="nx">(await|async|of)</span>',
    replacement: '<span class="kd">$1</span>',
    paths: [path],
    recursive: true
  });
}

function onError(err) {
  console.error(err);
  process.exit(1);
}

function buildEverything() {
  return bluebird.resolve()
    .then(checkJekyll)
    .then(buildCSS)
    .then(buildJekyll)
    .catch(onError);
}

if (!process.env.BUILD) {
  watchGlob('**', buildJekyll);
  watchGlob('docs/static/less/*/*.less', buildCSS);
  http_server.createServer({root: '_site', cache: '-1'}).listen(4000);
  console.log('Server address: http://0.0.0.0:4000');
}

buildEverything();