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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
Date: Thu, 11 Jul 2019 13:44:13 +0200
Subject: [PATCH] 00328: Restore pyc to TIMESTAMP invalidation mode as default
in rpmbuild
Since Fedora 31, the $SOURCE_DATE_EPOCH is set in rpmbuild to the latest
%changelog date. This makes Python default to the CHECKED_HASH pyc
invalidation mode, bringing more reproducible builds traded for an import
performance decrease. To avoid that, we don't default to CHECKED_HASH
when $RPM_BUILD_ROOT is set (i.e. when we are building RPM packages).
See https://src.fedoraproject.org/rpms/redhat-rpm-config/pull-request/57#comment-27426
Downstream only: only used when building RPM packages
Ideally, we should talk to upstream and explain why we don't want this
---
Lib/py_compile.py | 3 ++-
Lib/test/test_py_compile.py | 2 ++
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/Lib/py_compile.py b/Lib/py_compile.py
index 388614e51b..db52725016 100644
--- a/Lib/py_compile.py
+++ b/Lib/py_compile.py
@@ -70,7 +70,8 @@ class PycInvalidationMode(enum.Enum):
def _get_default_invalidation_mode():
- if os.environ.get('SOURCE_DATE_EPOCH'):
+ if (os.environ.get('SOURCE_DATE_EPOCH') and not
+ os.environ.get('RPM_BUILD_ROOT')):
return PycInvalidationMode.CHECKED_HASH
else:
return PycInvalidationMode.TIMESTAMP
diff --git a/Lib/test/test_py_compile.py b/Lib/test/test_py_compile.py
index a4a52b180d..e53f5d92aa 100644
--- a/Lib/test/test_py_compile.py
+++ b/Lib/test/test_py_compile.py
@@ -19,6 +19,7 @@ def without_source_date_epoch(fxn):
def wrapper(*args, **kwargs):
with os_helper.EnvironmentVarGuard() as env:
env.unset('SOURCE_DATE_EPOCH')
+ env.unset('RPM_BUILD_ROOT')
return fxn(*args, **kwargs)
return wrapper
@@ -29,6 +30,7 @@ def with_source_date_epoch(fxn):
def wrapper(*args, **kwargs):
with os_helper.EnvironmentVarGuard() as env:
env['SOURCE_DATE_EPOCH'] = '123456789'
+ env.unset('RPM_BUILD_ROOT')
return fxn(*args, **kwargs)
return wrapper