ref(build): Convert postbuild.sh to node script

packages/browser/.npmignore

@@ -1,6 +1,6 @@
 # Info: the paths in this file are adjusted to match once this
 # file is copied to `./build`. This is done by a postbuild script
-# located in sentry-javascript/scripts/postbuild.sh
+# located in sentry-javascript/scripts/postbuild.ts
 
 *
 

packages/browser/package.json

@@ -44,7 +44,7 @@
     "webpack": "^4.30.0"
   },
   "scripts": {
-    "build": "run-p build:cjs build:esm build:bundle build:types && bash ../../scripts/postbuild.sh",
+    "build": "run-p build:cjs build:esm build:bundle build:types && ts-node ../../scripts/postbuild.ts",
     "build:bundle": "rollup --config",
     "build:cjs": "tsc -p tsconfig.cjs.json",
     "build:dev": "run-p build:cjs build:esm build:types",

scripts/postbuild.ts

@@ -0,0 +1,48 @@
+/*
+  This script prepares the central `build` directory for NPM package creation.
+  It first copies all non-code files into the `build` directory, including `package.json` which
+  is edited to adjust entry point paths. These corrections are performed so that they align with
+  the directory structure inside `build`.
+*/
+
+import * as fs from 'fs';
+
+import * as path from 'path';
+
+const BUILD_DIR = 'build';
+const ASSETS = ['README.md', 'LICENSE', 'package.json', '.npmignore'];
+const ENTRY_POINTS = ['main', 'module', 'types'];
+
+// check if build dirs exists
+if (!fs.existsSync(BUILD_DIR)) {
+  console.error(`Directory ${BUILD_DIR} DOES NOT exist`);
+  console.error("This script should only be executed after you've run `yarn build`.");
+  process.exit(1);
+}
+
+// copy non-code assets to build dir
+ASSETS.forEach(asset => {
+  if (!fs.existsSync(asset)) {
+    console.error(`Asset ${asset} does not exist.`);
+    process.exit(1);
+  }
+  fs.copyFileSync(asset, path.join(BUILD_DIR, asset));
+});
+
+// package.json modifications
+const packageJsonPath = path.join(process.cwd(), BUILD_DIR, 'package.json');
+const pkg: { [key: string]: string } = require(packageJsonPath);
+
+// modify entry points to point to correct paths (i.e. delete the build directory)
+ENTRY_POINTS.filter(entryPoint => !!pkg[entryPoint]).forEach(entryPoint => {
+  pkg[entryPoint] = pkg[entryPoint].replace(`${BUILD_DIR}/`, '');
+});
+
+// TODO decide if we want this:
+delete pkg.scripts;
+delete pkg.volta;
+
+// write modified package.json to file
+fs.writeFileSync(packageJsonPath, JSON.stringify(pkg, null, 2));
+
+console.log('Successfully finished postbuild commands');