hide special charecters and lower funny usernames

Author: Sphesihle Makhathini

stimela/__init__.py

@@ -3,6 +3,7 @@
 import inspect
 import pkg_resources
 import logging
+import re
 
 try:
     __version__ = pkg_resources.require("stimela")[0].version
@@ -13,6 +14,7 @@
 USER = os.environ["USER"]
 UID = os.getuid()
 GID = os.getgid()
+CAB_USERNAME = re.sub('[^0-9a-zA-Z]+', '_', USER).lower() 
 
 root = os.path.dirname(__file__)
 

stimela/main.py

@@ -7,7 +7,6 @@
 from stimela import docker, singularity, udocker, podman, utils
 from stimela.utils import logger
 from stimela.cargo import cab
-import re
 
 BASE = stimela.BASE
 CAB = stimela.CAB
@@ -17,7 +16,7 @@
 LOG_HOME = stimela.LOG_HOME
 LOG_FILE = stimela.LOG_FILE
 GLOBALS = stimela.GLOBALS
-CAB_USERNAME = re.sub('[^0-9a-zA-Z]+', '_', USER).lower()
+CAB_USERNAME = stimela.CAB_USERNAME
 
 class MultilineFormatter(argparse.HelpFormatter):
     def _fill_text(self, text, width, indent):

stimela/recipe.py

@@ -22,6 +22,7 @@
 CAB_PATH = os.path.abspath(os.path.dirname(cab.__file__))
 BIN = os.path.abspath(os.path.dirname(sys.executable))
 
+
 CONT_IO = {
     "docker": {
         "input": "/input",
@@ -818,7 +819,7 @@ def __init__(self, name, data=None,
 
         self.stimela_path = os.path.dirname(docker.__file__)
 
-        self.build_label = build_label or USER
+        self.build_label = build_label or stimela.CAB_USERNAME
         self.ms_dir = ms_dir
         if not os.path.exists(self.ms_dir):
             self.log.info(