ci: Add type definition check (#2462)

Author: dplewis

.github/workflows/ci.yml

@@ -27,8 +27,8 @@ jobs:
         with:
           cache: npm
       - run: npm ci
-      - name: Build Types
-        run: npm run build:types
+      - name: Type Definition Check
+        run: npm run ci:typecheck
       - name: Test Types
         run: npm run test:types 2>&1 | tee silent.txt;
   check-docs:

ci/typecheck.js

@@ -0,0 +1,35 @@
+const fs = require('fs').promises;
+const { exec } = require('child_process');
+const util = require('util');
+
+async function getTypes(files) {
+  const types = {};
+  const promise = files.map((file) => {
+    if (file.includes('.d.ts')) {
+      return fs.readFile(`./types/${file}`, 'utf8').then((content) => {
+        types[file] = content;
+      });
+    }
+  });
+  await Promise.all(promise);
+  return types;
+}
+
+(async () => {
+  const execute = util.promisify(exec);
+  const currentFiles = await fs.readdir('./types');
+  const currentTypes = await getTypes(currentFiles);
+  await execute('npm run build:types');
+  const newFiles = await fs.readdir('./types');
+  const newTypes = await getTypes(newFiles);
+  for (const file of newFiles) {
+    if (currentTypes[file] !== newTypes[file]) {
+      console.error(
+        '\x1b[31m%s\x1b[0m',
+        'Type definitions files cannot be updated manually. Use `npm run build:types` to generate type definitions.'
+      );
+      process.exit(1);
+    }
+  }
+  process.exit(0);
+})();

package.json

@@ -97,7 +97,8 @@
   },
   "scripts": {
     "build": "node build_releases.js",
-    "build:types": "tsc && prettier --write 'types/{**/*,*}.ts' && npm run lint:fix",
+    "build:types": "tsc && prettier --write 'types/{**/*,*}.ts'",
+    "ci:typecheck": "node ./ci/typecheck.js",
     "release": "node build_releases.js && npm publish",
     "test": "cross-env PARSE_BUILD=node jest",
     "test:mongodb": "npm run test:mongodb:runnerstart && npm run integration",