[PATCH] wic:rootfs-u-boot.py: Set timestamps for newly updated files

[venkata.pyla@toshiba-tsip.com]

From: venkata pyla <venkata.pyla@toshiba-tsip.com>

The u-boot rootfs image is not reproducible because the
`update-u-boot-script` is creating new files with build timestamps,
whereas the rootfs files timestamps are set to SOURCE_DATE_EPOCH during
do_rootfs_finalize task and so for set the timestamps for the newly
updated files.

Signed-off-by: venkata pyla <venkata.pyla@toshiba-tsip.com>
---
 meta/scripts/lib/wic/plugins/source/rootfs-u-boot.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/meta/scripts/lib/wic/plugins/source/rootfs-u-boot.py b/meta/scripts/lib/wic/plugins/source/rootfs-u-boot.py
index 93600dc2..b7011775 100644
--- a/meta/scripts/lib/wic/plugins/source/rootfs-u-boot.py
+++ b/meta/scripts/lib/wic/plugins/source/rootfs-u-boot.py
@@ -106,6 +106,15 @@ class RootfsUBootPlugin(RootfsPlugin):
             rm_cmd = "rm -f %s/usr/bin/%s" % (real_rootfs_dir, qemu_static)
             exec_cmd(rm_cmd)
 
+        # For reproducibility set the time stamp of newly updated files
+        if os.getenv('SOURCE_DATE_EPOCH'):
+            sde_time = int(os.getenv('SOURCE_DATE_EPOCH'))
+            os.utime(u_boot_script, (sde_time, sde_time))
+            os.utime(os.path.join(real_rootfs_dir, "boot/boot.scr"),
+                     (sde_time, sde_time))
+            os.utime(os.path.join(real_rootfs_dir, "tmp"),
+                     (sde_time, sde_time))
+
         RootfsPlugin.do_prepare_partition(part, source_params, cr, cr_workdir,
                                           oe_builddir, bootimg_dir, kernel_dir,
                                           krootfs_dir, native_sysroot)
-- 
2.20.1