Bundle sql worker with webpack

webpack-sql-worker.config.ts

@@ -0,0 +1,36 @@
+// Copyright 2019-2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { resolve, join } from 'path';
+// eslint-disable-next-line import/no-extraneous-dependencies
+import { Configuration } from 'webpack';
+
+const context = __dirname;
+
+// A path relative to `ts/sql/` in `asar.unpacked`
+const libDir = join('..', '..', 'node_modules', 'better-sqlite3');
+const bindingFile = join(libDir, 'build', 'Release', 'better_sqlite3.node');
+
+const workerConfig: Configuration = {
+  context,
+  mode: 'development',
+  devtool: false,
+  entry: ['./ts/sql/mainWorker.js'],
+  target: 'node',
+  output: {
+    path: resolve(context, 'ts', 'sql'),
+    filename: 'mainWorker.bundle.js',
+    publicPath: './',
+  },
+  resolve: {
+    extensions: ['.js'],
+    alias: {
+      bindings: join(context, 'ts', 'sql', 'mainWorkerBindings.js'),
+    },
+  },
+  externals: {
+    'better_sqlite3.node': `commonjs2 ${bindingFile}`,
+  },
+};
+
+export default [workerConfig];