From 42aa93b8ff2f7879282b06efc73a31ec7785e602 Mon Sep 17 00:00:00 2001 From: Benjamin Peterson Date: Sat, 9 Dec 2017 10:26:52 -0800 Subject: closes bpo-31650: PEP 552 (Deterministic pycs) implementation (#4575) Python now supports checking bytecode cache up-to-dateness with a hash of the source contents rather than volatile source metadata. See the PEP for details. While a fairly straightforward idea, quite a lot of code had to be modified due to the pervasiveness of pyc implementation details in the codebase. Changes in this commit include: - The core changes to importlib to understand how to read, validate, and regenerate hash-based pycs. - Support for generating hash-based pycs in py_compile and compileall. - Modifications to our siphash implementation to support passing a custom key. We then expose it to importlib through _imp. - Updates to all places in the interpreter, standard library, and tests that manually generate or parse pyc files to grok the new format. - Support in the interpreter command line code for long options like --check-hash-based-pycs. - Tests and documentation for all of the above. --- Lib/test/test_py_compile.py | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'Lib/test/test_py_compile.py') diff --git a/Lib/test/test_py_compile.py b/Lib/test/test_py_compile.py index 4a6caa5718..bcb686c86b 100644 --- a/Lib/test/test_py_compile.py +++ b/Lib/test/test_py_compile.py @@ -122,6 +122,24 @@ class PyCompileTests(unittest.TestCase): # Specifying optimized bytecode should lead to a path reflecting that. self.assertIn('opt-2', py_compile.compile(self.source_path, optimize=2)) + def test_invalidation_mode(self): + py_compile.compile( + self.source_path, + invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH, + ) + with open(self.cache_path, 'rb') as fp: + flags = importlib._bootstrap_external._classify_pyc( + fp.read(), 'test', {}) + self.assertEqual(flags, 0b11) + py_compile.compile( + self.source_path, + invalidation_mode=py_compile.PycInvalidationMode.UNCHECKED_HASH, + ) + with open(self.cache_path, 'rb') as fp: + flags = importlib._bootstrap_external._classify_pyc( + fp.read(), 'test', {}) + self.assertEqual(flags, 0b1) + if __name__ == "__main__": unittest.main() -- cgit v1.2.1