Build Atom with Parcel

Author: aminya

.gitignore

@@ -19,3 +19,4 @@ spec/fixtures/evil-files/
 !spec/fixtures/packages/package-with-incompatible-native-module-loaded-conditionally/node_modules/
 out/
 /electron/
+.parcel-cache

package.json

@@ -271,6 +271,78 @@
     "preinstall": "node -e 'process.exit(0)'",
     "test": "node script/test"
   },
+  "engines": {
+    "electron": "9.4.4"
+  },
+  "main-target": "./out/app/src/main-process/main.bundle.js",
+  "start-target": "./out/app/src/main-process/start.bundle.js",
+  "application-target": "./out/app/src/main-process/atom-application.bundle.js",
+  "initialize-target": "./out/app/src/initialize-application-window.bundle.js",
+  "targets": {
+    "main-target": {
+      "source": "./out/app/src/main-process/main.js",
+      "context": "electron-main",
+      "includeNodeModules": {
+        "electron": false,
+        "y18n": false
+      }
+    },
+    "start-target": {
+      "source": "./out/app/src/main-process/start.js",
+      "context": "electron-main",
+      "includeNodeModules": {
+        "electron": false,
+        "nslog": false,
+        "y18n": false
+      }
+    },
+    "application-target": {
+      "source": "./out/app/src/main-process/atom-application.js",
+      "context": "electron-renderer",
+      "includeNodeModules": {
+        "electron": false,
+        "atom": false,
+        "pathwatcher": false,
+        "@atom/nsfw": false,
+        "@atom/watcher": false,
+        "fs-admin": false,
+        "git-utils": false,
+        "oniguruma": false,
+        "superstring": false
+      }
+    },
+    "initialize-target": {
+      "source": "./out/app/src/initialize-application-window.js",
+      "context": "electron-renderer",
+      "includeNodeModules": {
+        "electron": false,
+        "atom": false,
+        "pathwatcher": false,
+        "@atom/nsfw": false,
+        "@atom/watcher": false,
+        "fs-admin": false,
+        "git-utils": false,
+        "oniguruma": false,
+        "superstring": false,
+        "keybinding-resolver": false,
+        "keytar": false,
+        "loophole": false,
+        "pegjs": false,
+        "@atom/fuzzy-native": false,
+        "scrollbar-style": false,
+        "spellchecker": false,
+        "ctags": false,
+        "keyboard-layout": false,
+        "open-on-github": false,
+        "typescript": false,
+        "coffee-script": false,
+        "babel-core": false
+      }
+    }
+  },
+  "alias": {
+    "react-dom": "react-dom/cjs/react-dom.production.min.js"
+  },
   "standard-engine": "./script/node_modules/standard",
   "standard": {
     "env": {

script/lib/generate-startup-snapshot.js

@@ -6,6 +6,46 @@ const terser = require('terser');
 const CONFIG = require('../config');
 
 module.exports = function(packagedAppPath) {
+  console.log('Bundling with Parcel');
+  const parcel = childProcess.spawnSync(
+    process.execPath,
+    [
+      path.join(
+        CONFIG.repositoryRootPath,
+        'script',
+        'node_modules',
+        'parcel',
+        'lib',
+        'bin.js'
+      ),
+      'build',
+      CONFIG.repositoryRootPath,
+      '--detailed-report'
+    ],
+    { stdio: ['inherit', 'inherit', 'pipe'] }
+  );
+  if (parcel.stderr) {
+    console.error(parcel.stderr);
+  }
+  // replace bundles with the source
+  [
+    path.join(CONFIG.intermediateAppPath, 'src/main-process/main.bundle.js'),
+    path.join(CONFIG.intermediateAppPath, 'src/main-process/start.bundle.js'),
+    path.join(
+      CONFIG.intermediateAppPath,
+      'src/main-process/atom-application.bundle.js'
+    ),
+    path.join(
+      CONFIG.intermediateAppPath,
+      'src/initialize-application-window.bundle.js'
+    )
+  ].map(bundleFile => {
+    const sourceFile = bundleFile.replace('.bundle.js', '.js');
+    fs.unlinkSync(sourceFile);
+    fs.renameSync(bundleFile, sourceFile);
+    fs.renameSync(bundleFile + '.map', sourceFile + '.map');
+  });
+
   const snapshotScriptPath = path.join(CONFIG.buildOutputPath, 'startup.js');
   const coreModules = new Set([
     'electron',