[PATCH] isar-bootstrap-helper: Purge /var/lib/apt/lists on cleanup

[Jan Kiszka <jan.kiszka@siemens.com>]

This saves dozens of MB on the target image. The user just needs to run
"apt-get update" to restore it.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---

The lowest hanging fruit for tinyfication. Base image on armhf, e.g., is
now ~100 MB.

Claudius, to my understanding, this will not break reproducibility as
--clean is only done on the final target image, not during the build,
not on the buildchroots.

 meta/classes/isar-bootstrap-helper.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/isar-bootstrap-helper.bbclass b/meta/classes/isar-bootstrap-helper.bbclass
index d45cdd7..de056c1 100644
--- a/meta/classes/isar-bootstrap-helper.bbclass
+++ b/meta/classes/isar-bootstrap-helper.bbclass
@@ -136,6 +136,6 @@ setup_root_file_system() {
         sudo -E chroot "$ROOTFSDIR" \
             /usr/bin/apt-get clean
         sudo "$ROOTFSDIR/chroot-setup.sh" "cleanup" "$ROOTFSDIR"
-        sudo rm -f "$ROOTFSDIR/chroot-setup.sh"
+        sudo rm -rf "$ROOTFSDIR/chroot-setup.sh" "$ROOTFSDIR/var/lib/apt/lists/"*
     fi
 }
-- 
2.16.4