.eleventy.js

const fs = require("fs");

const rssPlugin = require('@11ty/eleventy-plugin-rss');
const syntaxHighlight = require('@11ty/eleventy-plugin-syntaxhighlight');

// Import filters
const dateFilter = require('./src/filters/date-filter.js');
const markdownFilter = require('./src/filters/markdown-filter.js');

// Import transforms
const htmlMinTransform = require('./src/transforms/html-min-transform.js');
const parseTransform = require('./src/transforms/parse-transform.js');

// Import data files
const site = require('./src/_data/site.json');

module.exports = function(config) {
  // Filters
  config.addFilter('dateFilter', dateFilter);
  config.addFilter('markdownFilter', markdownFilter);


  // Transforms
  config.addTransform('htmlmin', htmlMinTransform);
  config.addTransform('parse', parseTransform);

   // Passthrough copy
   config.addPassthroughCopy({"src/assets/images": "assets/images"});
   config.addPassthroughCopy({"src/assets/js": "assets/js"});
   config.addPassthroughCopy({"src/lib": "lib"});
   config.addPassthroughCopy({"src/assets/stylesheets": "assets/stylesheets"});
   config.addPassthroughCopy({"src/news/images": "news/images"})

  // Plugins
  config.addPlugin(rssPlugin);
  config.addPlugin(syntaxHighlight);

  // 404
  config.setBrowserSyncConfig({
    callbacks: {
      ready: function(err, bs) {

        bs.addMiddleware("*", (req, res) => {
          const content_404 = fs.readFileSync('dist/404.html');
          // Provides the 404 content without redirect.
          res.write(content_404);
          // Add 404 http status code in request header.
          // res.writeHead(404, { "Content-Type": "text/html" });
          res.writeHead(404);
          res.end();
        });
      }
    }
  });

  return {
    dir: {
      input: 'src',
      output: 'dist',
      includes: "_includes"
    },
    templateFormats: ["html", "md"],
    htmlTemplateEngine: "liquid",
    	// 1.1 Enable elventy to pass dirs specified above
    passthroughFileCopy: true
  };
};