[PATCH] image_types: Set SOURCE_DATE_EPOCH for squashfs

[PATCH] image_types: Set SOURCE_DATE_EPOCH for squashfs

[William A. Kennington III]

We want to use the reproducible timestamp for all of the files that is
set rootfs-postcommands.bbclass, derived from
REPRODUCIBLE_TIMESTAMP_ROOTFS. Without this, we use a hardcoded time
that is built into the squashfs sources.

Signed-off-by: William A. Kennington III <wak@google.com>
---
 meta/classes-recipe/image_types.bbclass | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/meta/classes-recipe/image_types.bbclass b/meta/classes-recipe/image_types.bbclass
index a731e585b2..764e6a5574 100644
--- a/meta/classes-recipe/image_types.bbclass
+++ b/meta/classes-recipe/image_types.bbclass
@@ -109,11 +109,19 @@ IMAGE_CMD:btrfs () {
 	mkfs.btrfs ${EXTRA_IMAGECMD} -r ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.btrfs
 }
 
-IMAGE_CMD:squashfs = "mksquashfs ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.squashfs ${EXTRA_IMAGECMD} -noappend"
-IMAGE_CMD:squashfs-xz = "mksquashfs ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.squashfs-xz ${EXTRA_IMAGECMD} -noappend -comp xz"
-IMAGE_CMD:squashfs-lzo = "mksquashfs ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.squashfs-lzo ${EXTRA_IMAGECMD} -noappend -comp lzo"
-IMAGE_CMD:squashfs-lz4 = "mksquashfs ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.squashfs-lz4 ${EXTRA_IMAGECMD} -noappend -comp lz4"
-IMAGE_CMD:squashfs-zst = "mksquashfs ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.squashfs-zst ${EXTRA_IMAGECMD} -noappend -comp zstd"
+oe_mksquashfs () {
+    local comp=$1
+    local suffix=$2
+
+    # Use the bitbake reproducible timestamp instead of the hardcoded squashfs one
+    export SOURCE_DATE_EPOCH=$(stat -c '%Y' ${IMAGE_ROOTFS})
+    mksquashfs ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.squashfs${comp:+-}${suffix:-$comp} ${EXTRA_IMAGECMD} -noappend ${comp:+-comp }$comp
+}
+IMAGE_CMD:squashfs = "oe_mksquashfs"
+IMAGE_CMD:squashfs-xz = "oe_mksquashfs xz"
+IMAGE_CMD:squashfs-lzo = "oe_mksquashfs lzo"
+IMAGE_CMD:squashfs-lz4 = "oe_mksquashfs lz4"
+IMAGE_CMD:squashfs-zst = "oe_mksquashfs zstd zst"
 
 IMAGE_CMD:erofs = "mkfs.erofs ${EXTRA_IMAGECMD} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.erofs ${IMAGE_ROOTFS}"
 IMAGE_CMD:erofs-lz4 = "mkfs.erofs -zlz4 ${EXTRA_IMAGECMD} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.erofs-lz4 ${IMAGE_ROOTFS}"
-- 
2.37.2.672.g94769d06f0-goog