fix: support esm entrypoints for asar shim

.gitignore

@@ -1,7 +1,9 @@
 node_modules
 dist
-entry-asar/*.js*
-entry-asar/*.ts
+entry-asar/cjs/*.js*
+entry-asar/cjs/*.d.ts
+entry-asar/esm/*.?js*
+entry-asar/esm/*.d.?ts
 *.app
 test/fixtures/apps
 coverage

entry-asar/cjs/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": ".",
+  },
+  "include": [
+    ".",
+    "../ambient.d.ts"
+  ],
+  "exclude": []
+}

entry-asar/esm/has-asar.mts

@@ -0,0 +1,28 @@
+import { app } from 'electron';
+import { createRequire } from 'node:module';
+import path from 'node:path';
+
+if (process.arch === 'arm64') {
+  await setPaths('arm64');
+} else {
+  await setPaths('x64');
+}
+
+async function setPaths(platform: string) {
+  // This should return the full path, ending in something like
+  // Notion.app/Contents/Resources/app.asar
+  const appPath = app.getAppPath();
+  const asarFile = `app-${platform}.asar`;
+
+  // Maybe we'll handle this in Electron one day
+  if (path.basename(appPath) === 'app.asar') {
+    const platformAppPath = path.join(path.dirname(appPath), asarFile);
+
+    // This is an undocumented API. It exists.
+    app.setAppPath(platformAppPath);
+  }
+
+  const require = createRequire(import.meta.url);
+  process._archPath = require.resolve(`../${asarFile}`);
+  await import(process._archPath);
+}

entry-asar/esm/no-asar.mts

@@ -0,0 +1,29 @@
+import { app } from 'electron';
+import { createRequire } from 'node:module';
+import path from 'node:path';
+
+if (process.arch === 'arm64') {
+  await setPaths('arm64');
+} else {
+  await setPaths('x64');
+}
+
+async function setPaths(platform: string) {
+  // This should return the full path, ending in something like
+  // Notion.app/Contents/Resources/app
+  const appPath = app.getAppPath();
+  const appFolder = `app-${platform}`;
+
+  // Maybe we'll handle this in Electron one day
+  if (path.basename(appPath) === 'app') {
+    const platformAppPath = path.join(path.dirname(appPath), appFolder);
+
+    // This is an undocumented private API. It exists.
+    app.setAppPath(platformAppPath);
+  }
+
+   const require = createRequire(import.meta.url);
+   process._archPath = require.resolve(`../${appFolder}`);
+
+   await import(process._archPath);
+}

entry-asar/esm/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfig.esm.json",
+  "compilerOptions": {
+    "module": "ESNext",
+    "target":"ESNext",
+    "outDir": ".",
+  },
+  "include": [
+    ".",
+    "../ambient.d.ts"
+  ],
+  "exclude": []
+}

package.json

@@ -20,12 +20,13 @@
   "files": [
     "dist/*",
     "entry-asar/*",
-    "!entry-asar/**/*.ts",
+    "!entry-asar/**/*.{ts,mts}",
+    "!entry-asar/**/tsconfig.json",
     "README.md"
   ],
   "author": "Samuel Attard",
   "scripts": {
-    "build": "tsc -p tsconfig.cjs.json && tsc -p tsconfig.esm.json && tsc -p tsconfig.entry-asar.json",
+    "build": "tsc -p tsconfig.cjs.json && tsc -p tsconfig.esm.json && tsc -p entry-asar/esm/tsconfig.json && tsc -p entry-asar/cjs/tsconfig.json",
     "build:docs": "npx typedoc",
     "lint": "prettier --check \"{src,entry-asar,test}/**/*.ts\" \"*.ts\"",
     "prettier:write": "prettier --write \"{src,entry-asar,test}/**/*.ts\" \"*.ts\"",

src/index.ts

@@ -233,14 +233,27 @@ export const makeUniversalApp = async (opts: MakeUniversalOpts): Promise<void> =
 
         const entryAsar = path.resolve(tmpDir, 'entry-asar');
         await fs.mkdir(entryAsar);
-        await fs.copy(
-          path.resolve(__dirname, '..', '..', 'entry-asar', 'no-asar.js'),
-          path.resolve(entryAsar, 'index.js'),
-        );
+
         let pj = await fs.readJson(
           path.resolve(opts.x64AppPath, 'Contents', 'Resources', 'app', 'package.json'),
         );
-        pj.main = 'index.js';
+
+        // Load a shim that redirects to the correct folder for the architecture.
+        // This needs to be a different file depending on if the app entrypoint is CommonJS or ESM.
+        if (pj.type === 'module' || pj.main.endsWith('.mjs')) {
+          await fs.copy(
+            path.resolve(__dirname, '..', '..', 'entry-asar', 'esm', 'no-asar.mjs'),
+            path.resolve(entryAsar, 'index.mjs'),
+          );
+          pj.main = 'index.mjs';
+        } else {
+          await fs.copy(
+            path.resolve(__dirname, '..', '..', 'entry-asar', 'cjs', 'no-asar.js'),
+            path.resolve(entryAsar, 'index.js'),
+          );
+          pj.main = 'index.js';
+        }
+
         await fs.writeJson(path.resolve(entryAsar, 'package.json'), pj);
         await asar.createPackage(
           entryAsar,
@@ -313,10 +326,6 @@ export const makeUniversalApp = async (opts: MakeUniversalOpts): Promise<void> =
 
         const entryAsar = path.resolve(tmpDir, 'entry-asar');
         await fs.mkdir(entryAsar);
-        await fs.copy(
-          path.resolve(__dirname, '..', '..', 'entry-asar', 'has-asar.js'),
-          path.resolve(entryAsar, 'index.js'),
-        );
         let pj = JSON.parse(
           (
             await asar.extractFile(
@@ -325,7 +334,23 @@ export const makeUniversalApp = async (opts: MakeUniversalOpts): Promise<void> =
             )
           ).toString('utf8'),
         );
-        pj.main = 'index.js';
+
+        // Load a shim that redirects to the correct `app.asar` for the architecture.
+        // This needs to be a different file depending on if the app entrypoint is CommonJS or ESM.
+        if (pj.type === 'module' || pj.main.endsWith('.mjs')) {
+          await fs.copy(
+            path.resolve(__dirname, '..', '..', 'entry-asar', 'esm', 'has-asar.mjs'),
+            path.resolve(entryAsar, 'index.mjs'),
+          );
+          pj.main = 'index.mjs';
+        } else {
+          await fs.copy(
+            path.resolve(__dirname, '..', '..', 'entry-asar', 'cjs', 'has-asar.js'),
+            path.resolve(entryAsar, 'index.js'),
+          );
+          pj.main = 'index.js';
+        }
+
         await fs.writeJson(path.resolve(entryAsar, 'package.json'), pj);
         const asarPath = path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar');
         await asar.createPackage(entryAsar, asarPath);

tsconfig.json

@@ -17,7 +17,6 @@
     "declaration": true
   },
   "include": [
-    "src",
-    "entry-asar"
-  ]
+    "src"
+  ],
 }