.eleventy.js

const { DateTime } = require("luxon");
const CleanCSS = require("clean-css");
const UglifyJS = require("uglify-js");
const htmlmin = require("html-minifier");
const eleventyNavigationPlugin = require("@11ty/eleventy-navigation");
const {
  fortawesomeBrandsPlugin,
} = require("@vidhill/fortawesome-brands-11ty-shortcode");

module.exports = (eleventyConfig) => {
  eleventyConfig.addPlugin(fortawesomeBrandsPlugin);

  // Eleventy Navigation https://www.11ty.dev/docs/plugins/navigation/
  eleventyConfig.addPlugin(eleventyNavigationPlugin);

  // Configuration API: use eleventyConfig.addLayoutAlias(from, to) to add
  // layout aliases! Say you have a bunch of existing content using
  // layout: post. If you don’t want to rewrite all of those values, just map
  // post to a new file like this:
  // eleventyConfig.addLayoutAlias("post", "layouts/my_new_post_layout.njk");

  // Merge data instead of overriding
  // https://www.11ty.dev/docs/data-deep-merge/
  eleventyConfig.setDataDeepMerge(true);

  filterTags = (tags) => {
    return (tags || []).filter((tag) => ["all", "tagList"].indexOf(tag) === -1);
  };
  eleventyConfig.addFilter("filterTags", filterTags);

  // Create an array of all tags
  eleventyConfig.addCollection("tagList", (collection) => {
    let tagSet = new Set();
    collection.getFilteredByGlob("./projects/*.md").forEach((item) => {
      item.data.tags.forEach((tag) => tagSet.add(tag));
    });

    return filterTags([...tagSet]);
  });

  // Date formatting (human readable)
  eleventyConfig.addFilter("readableDate", (dateObj) => {
    return DateTime.fromJSDate(dateObj).toFormat("dd LLL yyyy");
  });

  // Date formatting (machine readable)
  eleventyConfig.addFilter("machineDate", (dateObj) => {
    return DateTime.fromJSDate(dateObj).toFormat("yyyy-MM-dd");
  });

  // Minify CSS
  eleventyConfig.addFilter("cssmin", (code) => {
    return new CleanCSS({}).minify(code).styles;
  });

  // Minify JS
  eleventyConfig.addFilter("jsmin", (code) => {
    let minified = UglifyJS.minify(code);
    if (minified.error) {
      console.log("UglifyJS error: ", minified.error);
      return code;
    }
    return minified.code;
  });

  // Minify HTML output
  eleventyConfig.addTransform("htmlmin", (content, outputPath) => {
    if (outputPath && outputPath.indexOf(".html") > -1) {
      let minified = htmlmin.minify(content, {
        useShortDoctype: true,
        removeComments: true,
        collapseWhitespace: true,
      });
      return minified;
    }
    return content;
  });

  // Don't process folders with static assets e.g. images
  eleventyConfig.addPassthroughCopy("favicon.ico");
  eleventyConfig.addPassthroughCopy("static/img");
  eleventyConfig.addPassthroughCopy("static/fonts");
  eleventyConfig.addPassthroughCopy("CNAME");
  eleventyConfig.addPassthroughCopy("_includes/assets/");

  /* Markdown Plugins */
  let markdownIt = require("markdown-it");
  let markdownItAnchor = require("markdown-it-anchor");
  let options = {
    html: true,
    breaks: true,
    linkify: true,
  };
  let opts = {
    permalink: false,
  };

  eleventyConfig.setLibrary(
    "md",
    markdownIt(options).use(markdownItAnchor, opts)
  );

  eleventyConfig.addPairedShortcode("mdRender", (title) => {
    return markdownIt().renderInline(title);
  });

  return {
    templateFormats: ["md", "njk", "html", "liquid"],

    // If your site lives in a different subdirectory, change this.
    // Leading or trailing slashes are all normalized away, so don’t worry about it.
    // If you don’t have a subdirectory, use "" or "/" (they do the same thing)
    // This is only used for URLs (it does not affect your file structure)
    pathPrefix: "/",

    markdownTemplateEngine: "liquid",
    htmlTemplateEngine: "njk",
    dataTemplateEngine: "njk",
    dir: {
      input: ".",
      includes: "_includes",
      data: "_data",
      output: "_site",
    },
  };
};