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python3-mlcommons-loadgen: support reproducibility

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Implement the SOURCE_DATE_EPOCH specification[1] for reproducible
builds. If SOURCE_DATE_EPOCH is set, use it as timestamp instead of the
current time.

[1] https://reproducible-builds.org/specs/source-date-epoch/

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
This commit is contained in:
Hongxu Jia 2025-09-26 16:19:12 +08:00 committed by Khem Raj
parent df688fc3c7
commit 4b589e4099
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2 changed files with 45 additions and 0 deletions
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meta-python/recipes-devtools/python3-mlcommons-loadgen/files/source-date-epoch.patch Normal file
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@ -0,0 +1,41 @@
From dd7925397b84c2a327cd4594edba9f7ca5acef61 Mon Sep 17 00:00:00 2001
From: Hongxu Jia <hongxu.jia@windriver.com>
Date: Fri, 26 Sep 2025 14:02:23 +0800
Subject: [PATCH] Honor the SOURCE_DATE_EPOCH variable
Implement the SOURCE_DATE_EPOCH specification[1] for reproducible
builds. If SOURCE_DATE_EPOCH is set, use it as timestamp instead of the
current time.
[1] https://reproducible-builds.org/specs/source-date-epoch/
Upstream-Status: Submitted [https://github.com/mlcommons/inference/pull/2345]
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
---
version_generator.py | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/version_generator.py b/version_generator.py
index 2e75243..5202da9 100644
--- a/version_generator.py
+++ b/version_generator.py
@@ -110,8 +110,13 @@ def generate_loadgen_version_definitions(cc_filename, loadgen_root):
# Write the version into the function definition
ofile.write(func_def("Version", f"\"{version_contents}\""))
- date_time_now_local = datetime.datetime.now().isoformat()
- date_time_now_utc = datetime.datetime.utcnow().isoformat()
+ if os.environ.get('SOURCE_DATE_EPOCH', False):
+ source_date_epoch = int(os.environ['SOURCE_DATE_EPOCH'])
+ date_time_now_local = datetime.datetime.fromtimestamp(source_date_epoch).isoformat()
+ date_time_now_utc = datetime.datetime.fromtimestamp(source_date_epoch, tz=datetime.timezone.utc).isoformat()
+ else:
+ date_time_now_local = datetime.datetime.now().isoformat()
+ date_time_now_utc = datetime.datetime.utcnow().isoformat()
ofile.write(func_def("BuildDateLocal", '"' + date_time_now_local + '"'))
ofile.write(func_def("BuildDateUtc", '"' + date_time_now_utc + '"'))
--
2.34.1

4
meta-python/recipes-devtools/python3-mlcommons-loadgen/python3-mlcommons-loadgen_5.1.0.bb
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@ -14,6 +14,10 @@ DEPENDS = "python3-pybind11-native"
inherit setuptools3 pypi
SRC_URI += " \
file://source-date-epoch.patch \
"
PYPI_PACKAGE = "mlcommons_loadgen"
UPSTREAM_CHECK_PYPI_PACKAGE = "mlcommons_loadgen"