Fixed environment variable path

Ticket: CFE-4468
Signed-off-by: Victor Moene <[email protected]>

cf_remote/paths.py

@@ -1,4 +1,5 @@
 import os
+from cf_remote.utils import user_error
 
 
 def path_append(dir, subdir):
@@ -7,8 +8,17 @@ def path_append(dir, subdir):
 
 
 def cfengine_dir(subdir=None):
-    cf_remote_dir = ".cfengine" if "CF_REMOTE_DIR" not in os.environ else os.environ["CF_REMOTE_DIR"]
-    return path_append("~/{}/".format(cf_remote_dir), subdir)
+    override_dir = os.getenv("CF_REMOTE_DIR")
+
+    if override_dir:
+        parent = os.path.dirname(override_dir)
+
+        if not os.path.exists(parent):
+            user_error("'{}' doesn't exist. Make sure this path is correct and exists.".format(parent))
+
+        return path_append(override_dir, subdir)
+
+    return path_append("~/.cfengine/", subdir)
 
 
 def cf_remote_dir(subdir=None):