potiuk commented on code in PR #61350:
URL: https://github.com/apache/airflow/pull/61350#discussion_r2758892139


##########
scripts/ci/prek/check_airflow_imports_in_shared.py:
##########
@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# /// script
+# requires-python = ">=3.10,<3.11"
+# dependencies = [
+#   "rich>=13.6.0",
+# ]
+# ///
+from __future__ import annotations
+
+import argparse
+import ast
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).parent.resolve()))
+from common_prek_utils import console
+
+
+def check_file_for_prohibited_imports(file_path: Path) -> list[tuple[int, 
str]]:
+    try:
+        source = file_path.read_text(encoding="utf-8")
+        tree = ast.parse(source, filename=str(file_path))
+    except (OSError, UnicodeDecodeError, SyntaxError):
+        return []

Review Comment:
   > I did some quick benchmarking locally just to see how ast.parse scales as 
we add more guardrails. While it’s definitely not a major issue today, the 
overhead is interesting to look at for the future:
   > 
   > Folders    Files   Lines   Parse (s)       I/O (s)
   > **Providers**      1,990   337,628 0.59s   0.05s
   > **Airflow Core**   619     104,664 0.21s   0.02s
   > **Other Support Tools**    373     68,009  0.15s   0.01s
   > **Shared Libs**    44      8,179   0.01s   0.001s
   
   In most cases we only parse the files that changed in a PR (prek framework 
provides it) so this is even less of an issue than you think.



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