index.js

import { fileURLToPath } from "node:url";
import { build } from "esbuild";

const usageOptions = {
  deno: "deno",
  compile: "deno-compile",
};

/** @type {import('.').default} */
export default function (opts = {}) {
  const { out = "build", buildOptions = {}, usage = usageOptions.deno } = opts;

  return {
    name: "deno-deploy-adapter",

    async adapt(builder) {
      const tmp = builder.getBuildDirectory("deno-deploy-adapter");

      builder.rimraf(out);
      builder.rimraf(tmp);
      builder.mkdirp(tmp);

      const outDir = `${out}/static/${builder.config.kit.paths.base}`;
      builder.writeClient(outDir);
      builder.writePrerendered(outDir);

      builder.writeServer(`${out}/server`);

      const denoPath = fileURLToPath(new URL("./files", import.meta.url).href);
      builder.copy(denoPath, `${out}`, {});

      const modPath = fileURLToPath(
        new URL("./files/mod.ts", import.meta.url).href,
      );
      builder.copy(modPath, `${out}/mod.ts`, {
        replace: {
          SERVER: "./server.js",
          APP_DIR: builder.getAppPath(),
          PRERENDERED: JSON.stringify(builder.prerendered.paths),
          CURRENT_DIRNAME: usage === usageOptions.deno
            ? "fromFileUrl(import.meta.url)"
            : "Deno.execPath()",
        },
      });

      const defaultOptions = {
        entryPoints: [`${out}/server.js`],
        outfile: `${out}/server.js`,
        bundle: true,
        format: "esm",
        target: "esnext",
        platform: "node",
        allowOverwrite: true,
      };

      for (const key of Object.keys(buildOptions)) {
        if (Object.hasOwn(defaultOptions, key)) {
          console.warn(
            `Warning: "buildOptions" has override for default "${key}" this may break deployment.`,
          );
        }
      }

      try {
        await build({
          ...defaultOptions,
          ...buildOptions,
        });
      } catch (err) {
        console.error(err);
        process.exit(1);
      } finally {
        builder.rimraf(`${out}/server`);
        console.warn(`
PLEASE NOTE: This adapter is no longer maintained.
Deno is now compatible with the official Node adapters:
https://svelte.dev/docs/kit/adapters
Use adapter v0.16.0 to hide this message.
`);
      }
    },
  };
}