.eleventy.js

const pkg = require("./package.json");
const EleventyVite = require("./EleventyVite");

module.exports = function(eleventyConfig, options = {}) {
  try {
    eleventyConfig.versionCheck(pkg["11ty"].compatibility);
  } catch(e) {
    console.warn( `[11ty] Warning: Eleventy Plugin (${pkg.name}) Compatibility: ${e.message}` );
  }

  let eleventyVite = new EleventyVite(eleventyConfig.dir.output, options);

  // Adds support for automatic publicDir passthrough copy
  // vite/rollup will not touch these files and as part of the build will copy them to the root of your output folder
  let publicDir = eleventyVite.options.viteOptions?.publicDir || "public";
  eleventyConfig.ignores.add(publicDir);

  // Use passthrough copy on the public directory
  let passthroughCopyObject = {};
  passthroughCopyObject[`${publicDir}/`] = "/"
  eleventyConfig.addPassthroughCopy(passthroughCopyObject);

  // Add temp folder to the ignores
  eleventyConfig.ignores.add(eleventyVite.getIgnoreDirectory());

  let serverOptions = Object.assign({
    module: "@11ty/eleventy-dev-server",
    domDiff: false,
  }, options.serverOptions);

  serverOptions.setup = async () => {
    // Use Vite as Middleware
    let middleware = await eleventyVite.getServerMiddleware();

    return {
      middleware: [ middleware ]
    }
  };

  eleventyConfig.setServerOptions(serverOptions);

  // Run Vite build
  // TODO use `build.write` option to work with json or ndjson outputs
  eleventyConfig.on("eleventy.after", async ({ dir, runMode, outputMode, results }) => {
    // Skips the Vite build if:
    //   --serve
    //   --to=json
    //   --to=ndjson
    //   or 0 output files from Eleventy build
    // Notably, this *does* run Vite build in --watch mode
    if(runMode === "serve" || outputMode === "json" || outputMode === "ndjson" || results.length === 0) {
      return;
    }

    await eleventyVite.runBuild(results);
  });
};