Merge branch 'feature/58020_make_grub_menu_accessible' into 'master'

Add script to toggle whether the GRUB menu is shown

See merge request os2borgerpc/os2borgerpc-scripts!260

Author: Marcus Funch

common/system/grub_menu_make_accessible.sh

@@ -0,0 +1,26 @@
+#! /usr/bin/env sh
+
+GRUB_MENU_ACCESSIBLE="$1"
+WAIT_HOW_LONG="$2"  # set to -1 to wait forever
+
+GRUB_CONFIG="/etc/default/grub"
+
+set -x
+
+echo "Show relevant settings before:"
+grep "TIMEOUT_STYLE" $GRUB_CONFIG
+grep "GRUB_TIMEOUT=" $GRUB_CONFIG
+
+if [ "$GRUB_MENU_ACCESSIBLE" = "True" ]; then
+  sed --in-place "s/GRUB_TIMEOUT_STYLE=hidden/GRUB_TIMEOUT_STYLE=menu/" $GRUB_CONFIG
+  sed --in-place "s/GRUB_TIMEOUT=.*/GRUB_TIMEOUT=$WAIT_HOW_LONG/" $GRUB_CONFIG
+else
+  sed --in-place "s/GRUB_TIMEOUT_STYLE=menu/GRUB_TIMEOUT_STYLE=hidden/" $GRUB_CONFIG
+  sed --in-place "s/GRUB_TIMEOUT=.*/GRUB_TIMEOUT=0/" $GRUB_CONFIG
+fi
+
+echo "Show full GRUB config after:"
+cat $GRUB_CONFIG
+
+# Now update GRUB's actual configuration with the new settings
+update-grub