set -e
+update_grub_wrapper() {
+ # default, unless configured otherwise:
+ ISO_LOCATION=/boot/grml
+
+ if [ -r /etc/default/grml-rescueboot ] ; then
+ . /etc/default/grml-rescueboot
+ fi
+
+ if ! ls "${ISO_LOCATION}"/*iso >/dev/null 2>&1 ; then
+ echo "INFO: No *.iso files found inside ${ISO_LOCATION}."
+ echo "INFO: Execute 'update-grml-rescueboot' to download and integrate a Grml ISO."
+ return 0
+ fi
+
+ if ! which update-grub >/dev/null 2>&1; then
+ echo "WARN: ISOs found inside ${ISO_LOCATION} but update-grub not present (huh?)"
+ return 0
+ fi
+
+ if ! [ -e /boot/grub/grub.cfg ] ; then
+ echo "WARN: ISOs found inside ${ISO_LOCATION} but /boot/grub/grub.cfg does not exist."
+ echo "WARN: Ignoring request to run update-grub to avoid possible boot loader problems."
+ return 0
+ fi
+
+ echo "INFO: ISOs found inside ${ISO_LOCATION}, invoking update-grub:"
+ update-grub
+}
+
case "$1" in
configure)
- # default, unless configured otherwise:
- ISO_LOCATION=/boot/grml
-
- if [ -r /etc/default/grml-rescueboot ] ; then
- . /etc/default/grml-rescueboot
- fi
-
- if ! ls "${ISO_LOCATION}"/*iso >/dev/null 2>&1 ; then
- echo "INFO: No *.iso files found inside ${ISO_LOCATION}."
- echo "INFO: Please create ${ISO_LOCATION} and place rescue ISO(s) there."
- echo "INFO: Finally invoke update-grub and enjoy your rescue system."
- else
- if ! which update-grub >/dev/null 2>&1; then
- echo "WARN: ISOs found inside ${ISO_LOCATION} but update-grub not present (huh?)"
- else
- echo "INFO: ISOs found inside ${ISO_LOCATION}, invoking update-grub:"
- update-grub
- fi
- fi
+ update_grub_wrapper
;;
abort-upgrade|abort-remove|abort-deconfigure)