Improved helper scripts. (#1986)

* added additional (more restrictive) checks

Signed-off-by: lns <matzeton@googlemail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/utils/mergeipaddrlist.py b/utils/mergeipaddrlist.py
index 36dfba43f..cef9b4660 100755
--- a/utils/mergeipaddrlist.py
+++ b/utils/mergeipaddrlist.py
@@ -16,5 +16,11 @@ ipFile = open(sys.argv[1])
 ipAddresses = list(ipFile.readlines())
 ipAddresses = sorted(ipAddresses)
 cidrs = netaddr.cidr_merge(ipAddresses)
+
+lines = 0
 for cidr in cidrs:
+    lines += 1
     print(cidr)
+
+if lines == 0:
+    sys.stderr.write(f'{sys.argv[0]}: file {sys.argv[1]} is empty\n')