[Buildroot] [PATCH v3 14/18] python3: generate reproducible .pyc

Jérôme Pouiller jezz at sysmic.org
Wed Nov 23 11:08:14 UTC 2016


.pyc files contain modification time of .py source. In order to make
build reproducible, we fix modification time of all .py before to
compile .pyc files.

This work was sponsored by `BA Robotic Systems'.

Signed-off-by: Jérôme Pouiller <jezz at sysmic.org>
---
 package/python3/python3.mk | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/package/python3/python3.mk b/package/python3/python3.mk
index b3f31c0..a526c0f 100644
--- a/package/python3/python3.mk
+++ b/package/python3/python3.mk
@@ -219,10 +219,18 @@ PYTHON3_PATH = $(TARGET_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)/sysconfigdat
 $(eval $(autotools-package))
 $(eval $(host-autotools-package))
 
+ifeq ($(BR2_REPRODUCIBLE),y)
+define PYTHON3_FIX_TIME
+	find $(TARGET_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR) -name '*.py' -print0 | \
+		xargs -0 --no-run-if-empty touch -d @$(SOURCE_DATE_EPOCH)
+endef
+PYTHON3_TARGET_FINALIZE_HOOKS += PYTHON3_FIX_TIME
+endif
+
 define PYTHON3_CREATE_PYC_FILES
 	PYTHONPATH="$(PYTHON3_PATH)" \
 	$(HOST_DIR)/usr/bin/python$(PYTHON3_VERSION_MAJOR) \
-		support/scripts/pycompile.py \
+		support/scripts/pycompile.py $(if $(BR2_REPRODUCIBLE),--force) \
 		$(TARGET_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)
 endef
 
-- 
1.9.1



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