Add cjs bundle output for @powersync/common.

Author: rkistner

.gitignore

@@ -1,7 +1,8 @@
 node_modules
 lib
 dist
-tsconfig.tsbuildinfo
+cjs
+*.tsbuildinfo
 .vscode
 .DS_STORE
 .idea

packages/common/package.json

@@ -6,9 +6,18 @@
     "access": "public"
   },
   "description": "API definitions for JourneyApps PowerSync",
-  "main": "dist/index.js",
-  "types": "lib/index.d.ts",
   "type": "module",
+  "main": "dist/bundle.cjs",
+  "module": "dist/bundle.mjs",
+  "types": "lib/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/bundle.mjs",
+      "require": "./dist/bundle.cjs",
+      "default": "./dist/bundle.mjs",
+      "types": "./lib/index.d.ts"
+    }
+  },
   "author": "JOURNEYAPPS",
   "license": "Apache-2.0",
   "files": [
@@ -24,8 +33,8 @@
   },
   "homepage": "https://docs.powersync.com",
   "scripts": {
-    "build": "tsc -b && rollup -c rollup.config.mjs",
-    "clean": "rm -rf lib tsconfig.tsbuildinfo dist",
+    "build": "tsc -b && rollup -c rollup.config.mjs && rollup -c rollup-cjs.config.mjs",
+    "clean": "rm -rf lib dist tsconfig.tsbuildinfo",
     "test": "vitest"
   },
   "dependencies": {

packages/common/rollup-cjs.config.mjs

@@ -0,0 +1,41 @@
+import commonjs from '@rollup/plugin-commonjs';
+import inject from '@rollup/plugin-inject';
+import json from '@rollup/plugin-json';
+import nodeResolve from '@rollup/plugin-node-resolve';
+import terser from '@rollup/plugin-terser';
+
+export default (commandLineArgs) => {
+  const sourcemap = (commandLineArgs.sourceMap || 'true') == 'true';
+
+  // Clears rollup CLI warning https://github.com/rollup/rollup/issues/2694
+  delete commandLineArgs.sourceMap;
+
+  return {
+    // esm input is better, even for cjs output
+    input: 'lib/index.js',
+    output: {
+      file: 'dist/bundle.cjs',
+      format: 'cjs',
+      sourcemap: sourcemap
+    },
+    plugins: [
+      json(),
+      nodeResolve({ preferBuiltins: false, browser: true }),
+      commonjs({}),
+      inject({
+        Buffer: ['buffer', 'Buffer'],
+        ReadableStream: ['web-streams-polyfill/ponyfill', 'ReadableStream'],
+        // Used by can-ndjson-stream
+        TextDecoder: ['text-encoding', 'TextDecoder']
+      }),
+      terser()
+    ],
+    // This makes life easier
+    external: [
+      // This has dynamic logic - makes bundling hard
+      'cross-fetch',
+      // TODO: make the useDefaults logic better. Currently need access to this package directly
+      'js-logger'
+    ]
+  };
+};

packages/common/rollup.config.mjs

@@ -13,7 +13,7 @@ export default (commandLineArgs) => {
   return {
     input: 'lib/index.js',
     output: {
-      file: 'dist/index.js',
+      file: 'dist/bundle.mjs',
       format: 'esm',
       sourcemap: sourcemap
     },

packages/common/tsconfig-cjs.json

@@ -5,7 +5,7 @@
     "jsx": "react",
     "types": ["node"],
     "rootDir": "src",
-    "outDir": "./lib/esm",
+    "outDir": "./lib",
     "lib": ["esnext"],
     "declaration": true,
     "module": "node16",