util.paths module added

This module is intended to return pathlib objects to common paths in
order to avoid multiple redefinitions in various objects

gpoa/util/paths.py

@@ -0,0 +1,31 @@
+import pathlib
+
+def default_policy_path():
+    '''
+    Returns path pointing to Default Policy directory.
+    '''
+    return pathlib.Path('/usr/share/local-policy/default')
+
+def cache_dir():
+    '''
+    Returns path pointing to gpupdate's cache directory
+    '''
+    cachedir = pathlib.Path('/var/cache/gpupdate')
+
+    if not cachedir.exists():
+        cachedir.mkdir(parents=True, exist_ok=True)
+
+    return cachedir
+
+def local_policy_cache():
+    '''
+    Returns path to directory where lies local policy settings cache
+    transformed into GPT.
+    '''
+    lpcache = pathlib.Path.joinpath(cache_dir(), 'local-policy')
+
+    if not lpcache.exists():
+        lpcache.mkdir(parents=True, exist_ok=True)
+
+    return lpcache
+