containerctl: Fix python version detection

Signed-off-by: Enno Tensing <tenno@suij.in>

containerctl

@@ -17,28 +17,22 @@ get_python_path()
 	pyver="$(/usr/bin/env "${py}" -c 'import sys; print(sys.version_info.minor)')"
 	if [ "${pyver}" -lt "11" ]
 	then
-		py="python3.13"
+		pyver="13"
+		py="python3.${pyver}"
 	else
 		printf '%b' "${py}"
 		return
 	fi
 
-	if /usr/bin/env "${py}" 2> /dev/null
-	then
-		return
-	fi
-
-	py="python3.12"
-	if /usr/bin/env "${py}" 2> /dev/null
-	then
-		return
-	fi
-
-	py="python3.11"
-	if /usr/bin/env "${py}" 2> /dev/null
+	while [ "${pyver}" -ge 11 ]
+	do
+		if /usr/bin/env "${py}" -c "print('${py}')" 2> /dev/null
 		then
 			return
 		fi
+		pyver=$((pyver - 1))
+		py="python3.${pyver}"
+	done
 
 	log_error 'containerctl needs at least Python 3.11 to run!'
 	exit 1