Add `read_config_file` function.

* gd_diff.py (read_config_file): New function.
* tests/test_gd_diff.py (test_read_config_file_fail)
(test_read_config_file_success): Tests for read_config_file.

1 files changed, 14 insertions, 0 deletions

diff --git a/gd_diff.py b/gd_diff.py
index 5f069d1..220f832 100644
--- a/gd_diff.py
+++ b/gd_diff.py
@@ -6,6 +6,7 @@
 #  gns-deb-diff is under the Public Domain. See
 #  <https://creativecommons.org/publicdomain/zero/1.0>
 
+import json
 import os
 import re
 import shlex
@@ -229,6 +230,19 @@ def config_file():
     return os.path.join(config_dir(), 'config')
 
 
+def read_config_file():
+    """Return config as a Python Object; False when config does not \
+    exist.
+
+    """
+    cf = config_file()
+
+    if not os.path.isfile(cf):
+        return False
+
+    return json.load(open(cf, 'r'))
+
+
 def pkgs_dir():
     """Return the `pkgs` directory.