Add prepublishOnly script to test changed package names exist on npm

package.json

@@ -38,6 +38,7 @@
     "generate:map": "tsx scripts/generateClientTypesMap",
     "generate:tests": "tsx scripts/generateNewClientTests",
     "lint": "biome lint --write",
+    "prepublishOnly": "tsx scripts/testChangedPackageNames",
     "release": "npm run build && changeset publish",
     "test": "vitest"
   },

scripts/testChangedPackageNames/index.ts

@@ -0,0 +1,29 @@
+import { exec } from "node:child_process";
+import { mkdtemp } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { promisify } from "node:util";
+import { CLIENT_PACKAGE_NAMES_MAP as PACKAGE_NAMES_MAP_TO_PUBLISH } from "../../src/transforms/v2-to-v3/config";
+
+const execAsync = promisify(exec);
+
+(async () => {
+  // Create temporary directory
+  const tempDir = await mkdtemp(join(tmpdir(), "testChangedPackageNames-"));
+  await execAsync("npm install aws-sdk-js-codemod@latest", { cwd: tempDir });
+
+  const { CLIENT_PACKAGE_NAMES_MAP: PACKAGE_NAMES_MAP_LATEST } = await import(
+    join(tempDir, "node_modules/aws-sdk-js-codemod/dist/transforms/v2-to-v3/config")
+  );
+
+  const changedPackageNames = Object.keys(PACKAGE_NAMES_MAP_TO_PUBLISH)
+    .filter((key) => PACKAGE_NAMES_MAP_TO_PUBLISH[key] !== PACKAGE_NAMES_MAP_LATEST[key])
+    .map((key) => PACKAGE_NAMES_MAP_TO_PUBLISH[key]);
+
+  console.log(`Changed package names: ${changedPackageNames.join(", ")}`);
+  for (const packageName of changedPackageNames) {
+    const npmPackageName = `@aws-sdk/${packageName}`;
+    await execAsync(`npm show ${npmPackageName} version`);
+    console.log(`${npmPackageName} exists`);
+  }
+})();