rootfs_rpm.bbclass: save rpmlib rather than remove it

The rpmlib was removed when images that add
"remove_packaging_data_files" to ROOTFS_POSTPROCESS_COMMAND, which would
make the increment rpm image generation doesn't work in the second
build, since list_installed_packages would get incorrect value in the
second build, move the rpmlib to ${T} rather than remove it, and move it
back when INC_RPM_IMAGE_GEN =1.

[YOCTO #2440]

(From OE-Core rev: c30e79510c06701f10f659eedaa0fe785538ac17)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Elizabeth Flanagan <elizabeth.flanagan@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 11 insertions, 1 deletions

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 573c90539c..fb932b9d66 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -143,6 +143,12 @@ fakeroot do_rootfs () {
     # When use the rpm incremental image generation, don't remove the rootfs
     if [ "${INC_RPM_IMAGE_GEN}" != "1" -o "${IMAGE_PKGTYPE}" != "rpm" ]; then
         rm -rf ${IMAGE_ROOTFS}
+    elif [ -d ${T}/saved_rpmlib/var/lib/rpm ]; then
+        # Move the rpmlib back
+        if [ ! -d ${IMAGE_ROOTFS}/var/lib/rpm ]; then
+                mkdir -p ${IMAGE_ROOTFS}/var/lib/
+                mv ${T}/saved_rpmlib/var/lib/rpm ${IMAGE_ROOTFS}/var/lib/
+        fi
     fi
         rm -rf ${MULTILIB_TEMP_ROOTFS}
         mkdir -p ${IMAGE_ROOTFS}
diff --git a/meta/classes/rootfs_rpm.bbclass b/meta/classes/rootfs_rpm.bbclass
index 9039b21a07..fbc46c056a 100644
--- a/meta/classes/rootfs_rpm.bbclass
+++ b/meta/classes/rootfs_rpm.bbclass
@@ -154,7 +154,11 @@ EOF
 }
 
 remove_packaging_data_files() {
-        rm -rf ${IMAGE_ROOTFS}${rpmlibdir}
+        # Save the rpmlib for increment rpm image generation
+        t="${T}/saved_rpmlib/var/lib"
+        rm -fr $t
+        mkdir -p $t
+        mv ${IMAGE_ROOTFS}${rpmlibdir} $t
         rm -rf ${IMAGE_ROOTFS}${opkglibdir}
 }