[PATCH v2 1/2] sstate: Generate image packages using sparse

[Adriaan Schmidt <adriaan.schmidt@siemens.com>]

From: Jan Kiszka <jan.kiszka@siemens.com>

Avoids needless expansion of sparse files while filling the sstate
cache.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Adriaan Schmidt <adriaan.schmidt@siemens.com>
---
 meta/classes/rootfs.bbclass                         | 2 +-
 meta/recipes-core/isar-bootstrap/isar-bootstrap.inc | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta/classes/rootfs.bbclass b/meta/classes/rootfs.bbclass
index f3272c07..bbb5ac0a 100644
--- a/meta/classes/rootfs.bbclass
+++ b/meta/classes/rootfs.bbclass
@@ -307,7 +307,7 @@ rootfs_install_sstate_prepare() {
     # so we use some mount magic to prevent that
     mkdir -p ${WORKDIR}/mnt/rootfs
     sudo mount --bind ${WORKDIR}/rootfs ${WORKDIR}/mnt/rootfs -o ro
-    sudo tar -C ${WORKDIR}/mnt -cpf rootfs.tar --one-file-system rootfs
+    sudo tar -C ${WORKDIR}/mnt -cpSf rootfs.tar --one-file-system rootfs
     sudo umount ${WORKDIR}/mnt/rootfs
     sudo chown $(id -u):$(id -g) rootfs.tar
 }
diff --git a/meta/recipes-core/isar-bootstrap/isar-bootstrap.inc b/meta/recipes-core/isar-bootstrap/isar-bootstrap.inc
index a453b36c..604cd24c 100644
--- a/meta/recipes-core/isar-bootstrap/isar-bootstrap.inc
+++ b/meta/recipes-core/isar-bootstrap/isar-bootstrap.inc
@@ -412,7 +412,7 @@ SSTATEPOSTINSTFUNCS += "bootstrap_sstate_finalize"
 
 bootstrap_sstate_prepare() {
     # this runs in SSTATE_BUILDDIR, which will be deleted automatically
-    sudo tar -C $(dirname "${ROOTFSDIR}") -cpf bootstrap.tar --one-file-system $(basename "${ROOTFSDIR}")
+    sudo tar -C $(dirname "${ROOTFSDIR}") -cpSf bootstrap.tar --one-file-system $(basename "${ROOTFSDIR}")
     sudo chown $(id -u):$(id -g) bootstrap.tar
 }
 
-- 
2.30.2