lofi task runner

run-tasks.js

/* eslint-disable no-console, arrow-body-style, quote-props, no-param-reassign */
const chokidar = require('chokidar');
const compileCSS = require('./css');
const cp = require('child_process');
const debounce = require('lodash/debounce');
const fs = require('fs');
const path = require('path');
const Promise = require('bluebird');

function run(cmd, args = []) {
  return new Promise((resolve, reject) => {
    const child = cp.spawn(cmd, args, {shell: true});
    child.on('close', (code) => {
      if (code === 0) return resolve(child);
      return reject(child);
    });
    child.stdout.pipe(process.stdout);
    child.stderr.pipe(process.stderr);
  });
}

function copyFAFonts() {
  return run('cp', ['-v', './node_modules/font-awesome/fonts/*webfont*', 'fonts/']);
}

function compileWebpack() {
  return run('./node_modules/.bin/webpack', []);
}

function watch(opts) {
  const debouncedCompileCSS = debounce(compileCSS, 200);
  chokidar.watch('**/*.less').on('change', () => debouncedCompileCSS(opts));
}

const taskDefinitions = {
  'css': compileCSS,
  'webpack': compileWebpack,
  'copy-fa-fonts': copyFAFonts,
};

function main(args) {
  const opts = {};
  args = args.filter((arg) => {
    const m = /^-+(.+)$/.exec(arg);
    if (m) {
      opts[m[1]] = true;
    }
    return !m;
  });
  let selectedTasks = args;
  if (!selectedTasks.length) selectedTasks = Array.from(Object.keys(taskDefinitions));
  const taskFns = selectedTasks.map((task) => taskDefinitions[task](opts));
  Promise.all(taskFns).then(() => {
    if (opts.watch) {
      console.log('starting watch');
      watch(opts);
    }
  });
}

if (!module.parent) {
  main(process.argv.slice(2));
}