Fix incremental rpm image generation

index ffe3b31..e2bec2d 100644
@@ -168,28 +168,24 @@ rpm_common_comand () {
 rpm_update_pkg () {
 
     manifest=$1
-    btmanifest=$manifest.bt
+    btmanifest=$manifest.bt.manifest
+    pre_btmanifest=${T}/${btmanifest##/*/}
     local target_rootfs="${INSTALL_ROOTFS_RPM}"
 
     # Save the rpm's build time for incremental image generation, and the file
     # would be moved to ${T}
-    rm -f $btmanifest
     for i in `cat $manifest`; do
         # Use "rpm" rather than "${RPM}" here, since we don't need the
         # '--dbpath' option
-        echo "$i `rpm -qp --qf '%{BUILDTIME}\n' $i`" >> $btmanifest
-    done
+        echo "$i `rpm -qp --qf '%{BUILDTIME}\n' $i`"
+    done | sort -u > $btmanifest
 
     # Only install the different pkgs if incremental image generation is set
-    if [ "${INC_RPM_IMAGE_GEN}" = "1" -a -f ${T}/total_solution_bt.manifest -a \
+    if [ "${INC_RPM_IMAGE_GEN}" = "1" -a -f "$pre_btmanifest" -a \
         "${IMAGE_PKGTYPE}" = "rpm" ]; then
-        cur_list="$btmanifest"
-        pre_list="${T}/total_solution_bt.manifest"
-        sort -u $cur_list -o $cur_list
-        sort -u $pre_list -o $pre_list
-        comm -1 -3 $cur_list $pre_list | sed 's#.*/\(.*\)\.rpm .*#\1#' > \
+        comm -1 -3 $btmanifest $pre_btmanifest | sed 's#.*/\(.*\)\.rpm .*#\1#' > \
             ${target_rootfs}/install/remove.manifest
-        comm -2 -3 $cur_list $pre_list | awk '{print $1}' > \
+        comm -2 -3 $btmanifest $pre_btmanifest | awk '{print $1}' > \
             ${target_rootfs}/install/incremental.manifest
 
         # Attempt to remove unwanted pkgs, the scripts(pre, post, etc.) has not

@@ -472,7 +468,7 @@ EOF
 	# probably a feature. The only way to convince rpm to actually run the preinstall scripts 
 	# for base-passwd and shadow first before installing packages that depend on these packages 
 	# is to do two image installs, installing one set of packages, then the other.
-	if [ "${INC_RPM_IMAGE_GEN}" = "1" -a -f ${T}/total_solution_bt.manifest ]; then
+	if [ "${INC_RPM_IMAGE_GEN}" = "1" -a -f "$pre_btmanifest" ]; then
 		echo "Skipping pre install due to exisitng image"
 	else
 		echo "# Initial Install manifest" > ${target_rootfs}/install/initial_install.manifest

index 9557433..90a6a9d 100644
@@ -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}

index 9039b21..fbc46c0 100644
@@ -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}
 }