restore support for old persistence media

[live-boot-grml.git] / components / 9990-misc-helpers.sh

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index 6f7b599..90aa6c7 100755 (executable)
--- a/components/9990-misc-helpers.sh
+++ b/components/9990-misc-helpers.sh
@@ -1646,6 +1646,32 @@ activate_custom_mounts ()
        echo ${used_devices}
 }
 
+fix_backwards_compatibility ()
+{
+       local device dir opt backing include_list
+       device=${1}
+       dir=${2}
+       opt=${3}
+
+       if [ -n "${PERSISTENCE_READONLY}" ]
+       then
+               return
+       fi
+
+       backing="$(mount_persistence_media ${device})"
+       if [ -z "${backing}" ]
+       then
+               return
+       fi
+
+       include_list="${backing}/${persistence_list}"
+       if [ ! -r "${include_list}" ] && [ ! -r "${backing}/${old_persistence_list}" ]
+       then
+               echo "# persistence backwards compatibility:
+${dir} ${opt},source=." > "${include_list}"
+       fi
+}
+
 is_mountpoint ()
 {
        directory="$1"