Add `configured_p` function.

* gd_diff.py (configured_p): New function.
* tests/test_gd_diff.py (test_configured_p_no)
(test_configured_p_yes): Test functions for `configured_p`.

1 files changed, 9 insertions, 0 deletions

diff --git a/gd_diff.py b/gd_diff.py
index ef0c070..fccc557 100644
--- a/gd_diff.py
+++ b/gd_diff.py
@@ -217,3 +217,12 @@ def config_dir():
 
 def config_file():
     return os.path.join(config_dir(), 'config')
+
+
+def configured_p():
+    """Returns True if gns-deb-diff is configured; False otherwise.
+    """
+    if os.path.isfile(config_file()):
+        return True
+    else:
+        return False