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build system: have tar use $SOURCE_DATE_EPOCH for --mtime 

The --mtime argument to 'tar' sets the modification time for all files within
the archive, which determines the timestamp files will get when they are
extracted. In this case, rootfs and other tarballs will get mtimes which
correspond to the last commit timestamp of the build system, as reported by
git/subversion.

This is a step towards reproducible image builds.

Signed-off-by: bryan newbold <bnewbold@robocracy.org>
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48586
lede-17.01
Felix Fietkau 2016-01-31 23:29:16 +00:00
parent ad8169546c
commit be6acba4dc
3 changed files with 15 additions and 4 deletions
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8
include/image.mk
View File

@ -186,7 +186,8 @@ ifneq ($(CONFIG_NAND_SUPPORT),)
[ -z "$(2)" ] || $(CP) "$(KDIR)/root.$(2)" "$(KDIR_TMP)/sysupgrade-$(1)/root"
[ -z "$(3)" ] || $(CP) "$(3)" "$(KDIR_TMP)/sysupgrade-$(1)/kernel"
(cd "$(KDIR_TMP)"; $(TAR) cvf \
"$(BIN_DIR)/$(IMG_PREFIX)-$(1)-$(2)-sysupgrade.tar" sysupgrade-$(1))
"$(BIN_DIR)/$(IMG_PREFIX)-$(1)-$(2)-sysupgrade.tar" sysupgrade-$(1) \
$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)")
endef
# $(1) board name
@ -248,7 +249,10 @@ define Image/mkfs/cpiogz
endef
define Image/mkfs/targz
$(TAR) -czpf $(BIN_DIR)/$(IMG_PREFIX)$(if $(PROFILE_SANITIZED),-$(PROFILE_SANITIZED))-rootfs.tar.gz --numeric-owner --owner=0 --group=0 --sort=name -C $(TARGET_DIR)/ .
$(TAR) -czpf $(BIN_DIR)/$(IMG_PREFIX)$(if $(PROFILE_SANITIZED),-$(PROFILE_SANITIZED))-rootfs.tar.gz \
--numeric-owner --owner=0 --group=0 --sort=name \
$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
-C $(TARGET_DIR)/ .
endef
E2SIZE=$(shell echo $$(($(CONFIG_TARGET_ROOTFS_PARTSIZE)*1024*1024)))

4
include/kernel-build.mk
View File

@ -54,7 +54,9 @@ ifdef CONFIG_COLLECT_KERNEL_DEBUG
$(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \
$(KERNEL_BUILD_DIR)/debug/modules/
$(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug
$(TAR) c -C $(KERNEL_BUILD_DIR) debug | bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2
$(TAR) c -C $(KERNEL_BUILD_DIR) debug \
$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
| bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2
endef
endif

7
scripts/sysupgrade-nand.sh
View File

@ -56,7 +56,12 @@ echo "BOARD=${board}" > "${tmpdir}/sysupgrade-${board}/CONTROL"
[ -z "${rootfs}" ] || cp "${rootfs}" "${tmpdir}/sysupgrade-${board}/root"
[ -z "${kernel}" ] || cp "${kernel}" "${tmpdir}/sysupgrade-${board}/kernel"
(cd "$tmpdir"; tar cvf sysupgrade.tar sysupgrade-${board})
mtime=""
if [ -n "$SOURCE_DATE_EPOCH" ]; then
mtime="--mtime=@${SOURCE_DATE_EPOCH}"
fi
(cd "$tmpdir"; tar cvf sysupgrade.tar sysupgrade-${board} ${mtime})
err="$?"
if [ -e "$tmpdir/sysupgrade.tar" ]; then
cp "$tmpdir/sysupgrade.tar" "$outfile"