uses utilpack for envvar base

src/dls_multiconf_lib/envvar.py

@@ -1,32 +1,7 @@
-import logging
-import os
+from dls_utilpack.envvar import Envvar as DlsUtilpackEnvvar
 
-logger = logging.getLogger(__name__)
 
-
-class Envvar:
+class Envvar(DlsUtilpackEnvvar):
     """Class which covers environment variables, with default values."""
 
     MULTICONF_CONFIGFILE = "MULTICONF_CONFIGFILE"
-
-    def __init__(self, name, **kwargs):
-
-        environ = kwargs.get("environ")
-
-        if environ is None:
-            environ = os.environ
-
-        self.name = name
-        self.is_set = False
-        self.value = None
-
-        if name in environ:
-            self.is_set = True
-            self.value = environ[name]
-        else:
-            if "default" in kwargs:
-                self.is_set = True
-                self.value = kwargs["default"]
-            else:
-                self.is_set = False
-                self.value = None