feat: mv example from README to .ini file

README.md

@@ -4,22 +4,9 @@ Update DNS records with your current external IP address using the netcup DNS AP
 
 ## Configuration
 
-For each netcup customer, create a `.ini` configuration file. Here is an example:
+For each netcup customer, create a `.ini` configuration file.
 
-```ini
-[credentials]
-customer = 123456
-api_key = abcdefghijklmnopqrstuvwxyz
-api_password = abcdefghijklmnopqrstuvwxyz
-
-[example.com]
-hostname = @
-type = A
-
-[foo.bar]
-hostname = @
-type = A
-```
+There is an [example configuration](cfg/example.ini).
 
 ## TODOs
 

cfg/example.ini

@@ -0,0 +1,12 @@
+;[credentials]
+;customer = 123456
+;api_key = abcdefghijklmnopqrstuvwxyz
+;api_password = abcdefghijklmnopqrstuvwxyz
+;
+;[example.com]
+;hostname = @
+;type = A
+;
+;[foo.bar]
+;hostname = @
+;type = A

src/netcup_dns/main.py

@@ -26,6 +26,10 @@ def main():
     for cfg_file in cfg_files:
         cfg = configparser.ConfigParser()
         cfg.read(cfg_file)
+        if len(cfg.sections()) == 0:
+            # Skip completely empty configuration file.
+            continue
+
         customer = cfg['credentials']['customer']
         api_key = cfg['credentials']['api_key']
         api_password = cfg['credentials']['api_password']