Exit process with error code if the operation fails

When the license setting process failed, the process still returned with success (exit code = 0).
This made it more difficult to detect a problem: the caller process had to parse the output text of the process.

Exit code is now set to non-zero value, so the caller process can detect errors without searching for specific text patterns.

totalsegmentator/config.py

@@ -75,7 +75,7 @@ def setup_totalseg(totalseg_id=None):
 def set_license_number(license_number):
     if not is_valid_license(license_number):
         print("ERROR: Invalid license number. Please check your license number or contact support.")
-        sys.exit(0)
+        sys.exit(1)
 
     totalseg_dir = get_totalseg_dir()
     totalseg_config_file = totalseg_dir / "config.json"

totalsegmentator/libs.py

@@ -80,7 +80,7 @@ def download_model_with_license_and_unpack(task_name, config_dir):
         else:
             if r.json()['status'] == "invalid_license":
                 print(f"ERROR: Invalid license number ({license_number}). Please check your license number or contact support.")
-                sys.exit(0)
+                sys.exit(1)
 
     except Exception as e:
         raise e

totalsegmentator/python_api.py

@@ -29,13 +29,13 @@ def show_license_info():
 
               For commercial usage contact: jakob.wasserthal@usb.ch
               """))
-        sys.exit(0)
+        sys.exit(1)
     elif status == "invalid_license":
         print(message)
-        sys.exit(0)
+        sys.exit(1)
     elif status == "missing_config_file":
         print(message)
-        sys.exit(0)
+        sys.exit(1)
 
 
 def totalsegmentator(input, output, ml=False, nr_thr_resamp=1, nr_thr_saving=6,