Improve error handling in prepack script (#209)

scripts/prepack.js

@@ -1,34 +1,36 @@
 #!/usr/bin/env node
 import fs from 'node:fs/promises';
+import process from 'node:process';
 import { execaCommand } from 'execa';
 
-async function getMetadata () {
-	const metadata = JSON.parse(await fs.readFile('package.json', 'utf8'));
-
+/**
+ * @param {Record<string, any>} packageMeta
+ */
+function processPackageJson (packageMeta) {
 	// Cleanup package.json
-	delete metadata.scripts;
-	delete metadata.devDependencies;
-	delete metadata.engines.pnpm;
-	delete metadata.imports['#test/*'];
-	delete metadata.packageManager;
-	delete metadata.pnpm;
-
-	for (const subpath of Object.keys(metadata.exports ?? {})) {
-		delete metadata.exports[subpath].docs;
+	delete packageMeta.scripts;
+	delete packageMeta.devDependencies;
+	delete packageMeta.engines.pnpm;
+	delete packageMeta.imports['#test/*'];
+	delete packageMeta.packageManager;
+	delete packageMeta.pnpm;
+
+	const exports = packageMeta.exports ?? {};
+
+	for (const subpath of Object.keys(exports)) {
+		delete exports[subpath].docs;
 	}
 
-	return metadata;
+	return packageMeta;
 }
 
-const metadata = await getMetadata();
-
 /** @type {import('execa').Options} */
 const options = {
 	stdio: 'inherit',
 };
 
 console.log('pnpm install');
-await execaCommand('pnpm install', options);
+await execaCommand('pnpm install --prod=false', options);
 
 console.log('pnpm run build');
 await execaCommand('pnpm run build', options);
@@ -39,8 +41,25 @@ await execaCommand('pnpm run lint', options);
 console.log('pnpm run test');
 await execaCommand('pnpm run test', options);
 
-console.log('mv package.json …');
-await fs.rename('package.json', '.package.dev.json');
+const packageJson = await fs.readFile('package.json', 'utf8');
+const newPackageJson = JSON.stringify(processPackageJson(JSON.parse(packageJson)));
+
+try {
+	console.log('mv package.json …');
+	await fs.rename('package.json', '.package.dev.json');
 
-console.log('new package.json');
-await fs.writeFile('package.json', JSON.stringify(metadata));
+	console.log('new package.json');
+	await fs.writeFile('package.json', newPackageJson);
+} catch (error) {
+	console.error(error);
+
+	console.error('# Reverting changes to package.json');
+	await fs.writeFile('package.json', packageJson);
+
+	console.error('rm …');
+	await fs.rm('.package.dev.json', {
+		force: true,
+	});
+
+	process.exit(1);
+}