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build: find the source date of a package only once per directory

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Make expands PKG_SOURCE_DATE_EPOCH for every recipe of a package, as
package-pack.mk exports it to the recipes. Every expansion runs
get_source_date_epoch.sh, which runs git.

Keep the result for each directory. The directory still depends on
whether the build directory has a version.date file.

Signed-off-by: John Crispin <john@phrozen.org>
This commit is contained in:
John Crispin committed 2026-09-22 18:18:58 +02:00
1 parent 43a9ff1c94
commit a44d3e3256
1 file changed
+5 -2
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include/package.mk
+5 -2
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@@ -15,8 +15,11 @@ PKG_SKIP_DOWNLOAD=$(USE_SOURCE_DIR)$(USE_GIT_TREE)$(USE_GIT_SRC_CHECKOUT)
MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) $(if $(filter 3.% 4.0 4.1,$(MAKE_VERSION)),-j))
PKG_SOURCE_DATE_EPOCH = $(if $(DUMP),,$(shell $(TOPDIR)/scripts/get_source_date_epoch.sh \
$(if $(wildcard $(PKG_BUILD_DIR)/version.date),$(PKG_BUILD_DIR),$(CURDIR))))
# Make expands PKG_SOURCE_DATE_EPOCH for every recipe of the package, so
# keep the result for each directory.
source_date_epoch=$(if $(filter undefined,$(origin source_date_epoch/$(1))),$(eval source_date_epoch/$(1):=$(shell $(TOPDIR)/scripts/get_source_date_epoch.sh $(1))))$(source_date_epoch/$(1))
PKG_SOURCE_DATE_EPOCH = $(if $(DUMP),,$(call source_date_epoch,$(if \
$(wildcard $(PKG_BUILD_DIR)/version.date),$(PKG_BUILD_DIR),$(CURDIR))))
ifeq ($(strip $(PKG_BUILD_PARALLEL)),0)
PKG_JOBS?=-j1