[PATCH 09/10] sstate: add caching to rootfs

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

Signed-off-by: Adriaan Schmidt <adriaan.schmidt@siemens.com>
---
 meta/classes/rootfs.bbclass | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/meta/classes/rootfs.bbclass b/meta/classes/rootfs.bbclass
index bd8a241..befe8c7 100644
--- a/meta/classes/rootfs.bbclass
+++ b/meta/classes/rootfs.bbclass
@@ -255,3 +255,27 @@ python do_rootfs() {
     pass
 }
 addtask rootfs before do_build
+
+do_rootfs[depends] = "base-apt:do_cache isar-apt:do_cache_config"
+
+SSTATETASKS += "do_rootfs"
+ROOTFS_SSTATE = "${WORKDIR}/rootfs-sstate"
+do_rootfs[dirs] += "${ROOTFS_SSTATE}"
+do_rootfs[cleandirs] += "${ROOTFS_SSTATE}"
+do_rootfs[sstate-plaindirs] = "${ROOTFS_SSTATE}"
+do_rootfs[sstate-interceptfuncs] = "rootfs_sstate_prepare"
+
+# the buildchroot is owned by root, so we need some sudoing to pack and unpack
+rootfs_sstate_prepare() {
+    sudo tar -C ${WORKDIR} -cpf ${ROOTFS_SSTATE}/rootfs.tar --one-file-system rootfs
+}
+
+rootfs_sstate_finalize() {
+    sudo tar -C ${WORKDIR} -xpf ${ROOTFS_SSTATE}/rootfs.tar
+}
+
+python do_rootfs_setscene() {
+    sstate_setscene(d)
+    bb.build.exec_func('buildchroot_sstate_finalize', d)
+}
+addtask do_rootfs_setscene
-- 
2.30.2