.eleventy.js

const { DateTime } = require("luxon");
const pluginRss = require("@11ty/eleventy-plugin-rss");
const timeToRead = require("eleventy-plugin-time-to-read");
const syntaxHighlight = require("@11ty/eleventy-plugin-syntaxhighlight");

module.exports = function (eleventyConfig) {
  eleventyConfig.addPassthroughCopy("./src/css");
  eleventyConfig.addPassthroughCopy("./src/js");
  eleventyConfig.addPassthroughCopy("./src/assets");
  eleventyConfig.addPassthroughCopy("./src/admin");
  eleventyConfig.addPassthroughCopy("./src/robots.txt");

  eleventyConfig.addPlugin(timeToRead);
  eleventyConfig.addPlugin(syntaxHighlight);

  eleventyConfig.addFilter("postDate", (dateObj) => {
    return DateTime.fromJSDate(dateObj).toLocaleString(DateTime.DATE_MED);
  });

  eleventyConfig.addPlugin(pluginRss);
  eleventyConfig.addLiquidFilter("dateToRfc3339", pluginRss.dateToRfc3339);

  function filterTagList(tags) {
    return (tags || []).filter(
      (tag) => ["all", "nav", "post", "posts"].indexOf(tag) === -1
    );
  }

  eleventyConfig.addFilter("filterTagList", filterTagList);

  // Create an array of all tags
  eleventyConfig.addCollection("tagList", function (collection) {
    let tagSet = new Set();
    collection.getAll().forEach((item) => {
      (item.data.tags || []).forEach((tag) => tagSet.add(tag));
    });

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

  return {
    markdownTemplateEngine: "md",

    htmlTemplateEngine: "njk",

    dir: {
      input: "src",
      output: "public",
    },
  };
};