Preemptively add version compare function

setup/setup.txt

@@ -76,6 +76,66 @@ fi
 echo "A2CLOUD version available: $version"
 echo "A2CLOUD version installed: ${installedVersion:-None}"
 
+function a2cCmpInstalled() {
+	local iMajor iMinor iRev
+	local cMajor cMinor cRev
+
+	[[ -z "$installedVersion" ]] && return 0 # No, not installed
+	[[ -z "$1" ]] && return 1
+	iMajor=${installedVersion%%.*}
+	iMinor=${installedVersion#*.}
+	iMinor=${iMinor%%.*}
+	iRev=${installedVersion##*.}
+	cMajor=${2%%.*}
+	cMinor=${2#*.}
+	cMinor=${cMinor%%.*}
+	cRev=${2##*.}
+
+	case "$1" in
+		lt|le)
+			if [[ "$iMajor" -lt "$cMajor" ]]; then
+				return 0
+			elif [[ "$iMajor" -eq "$cMajor" ]]; then
+				if [[ "$iMinor" -lt "$cMinor" ]]; then
+					return 0
+				elif [[ "$iMinor" -eq "$cMinor" ]]; then
+					if [[ "$iRev" -le "$cRev" ]]; then
+						if [[ "$1" == "le" || "$iRev" -lt "$cRev" ]]; then
+							return 0
+						fi
+					fi
+				fi
+			fi
+			;;
+		gt|ge)
+			if [[ "$iMajor" -gt "$cMajor" ]]; then
+				return 0
+			elif [[ "$iMajor" -eq "$cMajor" ]]; then
+				if [[ "$iMinor" -gt "$cMinor" ]]; then
+					return 0
+				elif [[ "$iMinor" -eq "$cMinor" ]]; then
+					if [[ "$iRev" -ge "$cRev" ]]; then
+						if [[ "$1" == "ge" || "$iRev" -gt "$cRev" ]]; then
+							return 0
+						fi
+					fi
+				fi
+			fi
+			;;
+		eq)
+			if [[ "$iMajor" -eq "$cMajor" ]]; then
+				if [[ "$iMinor" -eq "$cMinor" ]]; then
+					if [[ "$iRev" -eq "$cRev" ]]; then
+						return 0
+					fi
+				fi
+			fi
+			;;
+	esac
+
+	return 1
+}
+
 ### A2CLOUD: Process command line args
 buildA2CloudDisk=
 downloadBinaries=1