build.ts

import * as dnt from "https://deno.land/x/dnt@0.40.0/mod.ts";
import * as esbuild from "https://deno.land/x/esbuild@v0.17.11/mod.js";
import packageInfo from "./package.json" with { type: "json" };

await dnt.emptyDir("./dist");

//** NPM ES Module for Node.js and Browser */

await dnt.build({
  entryPoints: ["./mod.ts"],
  outDir: "./dist",
  test: false,
  scriptModule: false,
  typeCheck: false,
  shims: {},
  package: {
    ...packageInfo,
    engines: {
      node: ">=14",
    },
    dependencies: {
      "node-fetch": "^3.2.3",
      "@peculiar/webcrypto": "^1.4.0",
      "ws": "^8.10.0",
    },
    main: "./esm/mod.js",
    type: "module",
  },
  mappings: {
    "node:module": "data:text/javascript,export default class Module {}",
  },
});

Deno.copyFileSync("LICENSE", "dist/LICENSE");
Deno.copyFileSync("README.md", "dist/README.md");

// Copy WebAssembly

Deno.copyFileSync(
  "src/core/libs/cardano_multiplatform_lib/cardano_multiplatform_lib_bg.wasm",
  "dist/esm/src/core/libs/cardano_multiplatform_lib/cardano_multiplatform_lib_bg.wasm",
);
Deno.copyFileSync(
  "src/core/libs/cardano_message_signing/cardano_message_signing_bg.wasm",
  "dist/esm/src/core/libs/cardano_message_signing/cardano_message_signing_bg.wasm",
);

//** Web ES Module */

const importPathPlugin = {
  name: "core-import-path",
  setup(build: any) {
    build.onResolve({
      filter:
        /^\.\/libs\/cardano_multiplatform_lib\/cardano_multiplatform_lib.generated.js$/,
    }, (args: any) => {
      return {
        path:
          "../esm/src/core/libs/cardano_multiplatform_lib/cardano_multiplatform_lib.generated.js",
        external: true,
      };
    });
    build.onResolve({
      filter:
        /^\.\/libs\/cardano_message_signing\/cardano_message_signing.generated.js$/,
    }, (args: any) => {
      return {
        path:
          "../esm/src/core/libs/cardano_message_signing/cardano_message_signing.generated.js",
        external: true,
      };
    });
  },
};

await esbuild.build({
  bundle: true,
  format: "esm",
  entryPoints: ["./dist/esm/mod.js"],
  outfile: "./dist/web/mod.js",
  minify: true,
  plugins: [
    importPathPlugin,
  ],
});
esbuild.stop();

/** Add necessary global import statements to NPM ES Module. */
const coreFile = `const isNode = globalThis?.process?.versions?.node;
if (isNode) {
    if (typeof btoa === 'undefined') {globalThis.btoa = function (str) {return Buffer.from(str, 'binary').toString('base64');}; globalThis.atob = function (b64Encoded) {return Buffer.from(b64Encoded, 'base64').toString('binary');};}
    const fetch = /* #__PURE__ */ await import(/* webpackIgnore: true */ "node-fetch");
    const { Crypto } = /* #__PURE__ */ await import(/* webpackIgnore: true */ "@peculiar/webcrypto");
    const { WebSocket } = /* #__PURE__ */ await import(/* webpackIgnore: true */ "ws");
    const fs = /* #__PURE__ */ await import(/* webpackIgnore: true */ "fs");
    if (!globalThis.WebSocket) globalThis.WebSocket = WebSocket;
    if (!globalThis.crypto) globalThis.crypto = new Crypto();
    if (!globalThis.fetch) globalThis.fetch = fetch.default;
    if (!globalThis.Headers) globalThis.Headers = fetch.Headers;
    if (!globalThis.Request) globalThis.Request = fetch.Request;
    if (!globalThis.Response) globalThis.Response = fetch.Response;
    if (!globalThis.fs) globalThis.fs = fs; 
}

const C = await (async () => {
  try {
    if (isNode) {
      return await import(
        /* webpackIgnore: true */ "./libs/cardano_multiplatform_lib/nodejs/cardano_multiplatform_lib.generated.js"
      );
    }
    return await import(
      "./libs/cardano_multiplatform_lib/cardano_multiplatform_lib.generated.js"
    );
  } catch (_e) {
    // This only ever happens during SSR rendering
    return null;
  }
})();
const M = await (async () => {
  try {
    if (isNode) {
      return await import(
        /* webpackIgnore: true */ "./libs/cardano_message_signing/nodejs/cardano_message_signing.generated.js"
      );
    }
    return await import(
      "./libs/cardano_message_signing/cardano_message_signing.generated.js"
    );
  } catch (_e) {
    // This only ever happens during SSR rendering
    return null;
  }
})();
if (!isNode) {
  async function unsafeInstantiate(module) {
    try {
      await module.instantiate();
    } catch (_e) {
      // This only ever happens during SSR rendering
    }
  }
  await Promise.all([
    unsafeInstantiate(C),
    unsafeInstantiate(M),
  ]);
}
export { C, M };
`;
Deno.writeTextFileSync("dist/esm/src/core/core.js", coreFile);

Deno.mkdirSync("dist/esm/src/core/libs/cardano_message_signing/nodejs");
Deno.mkdirSync("dist/esm/src/core/libs/cardano_multiplatform_lib/nodejs");

Deno.copyFileSync(
  "src/core/libs/cardano_message_signing/nodejs/cardano_message_signing.generated.js",
  "dist/esm/src/core/libs/cardano_message_signing/nodejs/cardano_message_signing.generated.js",
);

Deno.copyFileSync(
  "src/core/libs/cardano_multiplatform_lib/nodejs/cardano_multiplatform_lib.generated.js",
  "dist/esm/src/core/libs/cardano_multiplatform_lib/nodejs/cardano_multiplatform_lib.generated.js",
);

Deno.writeTextFile(
  "dist/esm/src/core/libs/cardano_message_signing/nodejs/package.json",
  JSON.stringify({ type: "commonjs" }),
);
Deno.writeTextFile(
  "dist/esm/src/core/libs/cardano_multiplatform_lib/nodejs/package.json",
  JSON.stringify({ type: "commonjs" }),
);