armbian-install: add check for btrfs-progs

Author: JohnTheCoolingFan

packages/bsp/common/usr/bin/armbian-install

@@ -669,6 +669,17 @@ format_disk()
 	[[ $? -ne 0 ]] && exit 10
 	FilesystemChoosen=${FilesystemOptions[(2*$FilesystemChoices)-1]}
 
+	if [[ $FilesystemChoosen == *btrfs* ]] && ! command -v btrfs; then
+		dialog --yes-label "Install" --no-label 'Deny' --title "$title" --backtitle "$backtitle" --yesno "\nThe btrfs-progs package is not installed.\n\nIt is required to format the root partition as btrfs. Install it now?" 10 75
+		if [[ $? -eq 0 ]]; then
+			apt update && apt install --yes btrfs-progs
+		else
+			dialog --title "$title" --backtitle "$backtitle" --colors --infobox\
+			"\nCannot proceed without btrfs-progs" 5 60
+			exit 10
+		fi
+	fi
+
 	dialog --title "$title" --backtitle "$backtitle" --infobox "\nFormating $1 to $FilesystemChoosen ... please wait." 5 60
 	mkfs.${FilesystemChoosen} ${mkopts[$FilesystemChoosen]} "$1" >> $logfile 2>&1
 }