config: Set the config path when we read the file

Fixes #79. cfg_path was a terrible decision, and really shouldn't exist.
The idea was for the config object to keep track of where it was loaded
from -- but I'm abusing the ever loving stuffing out of it, and it
should be removed in a future release.

For the time being, however, I'm moving this line within the conditional
to ensure that cfg_path is only set when we are directly reading a file
on the disk. It's pedantic, but hopefully this will prevent any further
undefined behavior until I can revamp the config system.

taky/config.py

@@ -67,6 +67,9 @@ def load_config(path=None, explicit=False):
         cfg_dir = os.path.realpath(os.path.dirname(path))
         with open(path, "r", encoding="utf8") as cfg_fp:
             ret_config.read_file(cfg_fp, source=path)
+
+        # We know the file exists now, set the config path
+        ret_config.set("taky", "cfg_path", path)
     elif explicit:
         raise FileNotFoundError("Config file required, but not present")
     else:
@@ -75,9 +78,6 @@ def load_config(path=None, explicit=False):
 
         ret_config.set("taky", "root_dir", ".")
         ret_config.set("dp_server", "upload_path", "./dp-user")
-
-    # Set the config path
-    ret_config.set("taky","cfg_path",path)
 
     # Make directories absolute
     for (sect, opt) in [
@@ -136,7 +136,5 @@ def load_config(path=None, explicit=False):
                 f_path = os.path.realpath(os.path.join(cfg_dir, f_path))
                 ret_config.set("ssl", f_name, f_path)
 
-
-
     app_config.clear()
     app_config.update(ret_config)