.eleventy.js

const syntaxHighlight = require('@11ty/eleventy-plugin-syntaxhighlight');
const rss = require('@11ty/eleventy-plugin-rss');
const filters = require('./src/_11ty/filters.js');
const htmlmin = require('html-minifier');

module.exports = function (eleventyConfig) {
  // Plugins
  eleventyConfig.addPlugin(syntaxHighlight);
  eleventyConfig.addPlugin(rss);

  // Filters
  Object.keys(filters).forEach((filterName) => {
    eleventyConfig.addFilter(filterName, filters[filterName]);
  });

  // Transforms
  eleventyConfig.addTransform('htmlmin', function (content, outputPath) {
    if (outputPath.endsWith('.html')) {
      let minified = htmlmin.minify(content, {
        useShortDoctype: true,
        removeComments: true,
        collapseWhitespace: true,
      });
      return minified;
    }

    return content;
  });

  // Collections
  eleventyConfig.addCollection('entriesSorted', function (collection) {
    return collection.getFilteredByTag('entry').sort(function (a, b) {
      if (a.data.title < b.data.title) {
        return -1;
      }
      if (a.data.title > b.data.title) {
        return 1;
      }
      return 0;
    });
  });

  eleventyConfig.addPassthroughCopy({
    './src/assets/favicon': '/',
    './src/images': '/images',
    './src/assets': '/assets',
    './src/netlify.toml': '/netlify.toml',
  });

  return {
    templateFormats: ['md', 'njk'],

    pathPrefix: '/',

    markdownTemplateEngine: 'njk',
    htmlTemplateEngine: 'njk',
    dataTemplateEngine: 'njk',
    passthroughFileCopy: true,
    dir: {
      input: 'src',
      includes: '_includes',
      data: '_data',
      output: '_site',
    },
  };
};