Fix issues caught by linter

* Add a .pylintrc to silence annoying messages
* Fix imports
* Add missing `parse_db_url` function
* Add a new `gn_auth.auth.db.redis` module

1 files changed, 22 insertions, 0 deletions

diff --git a/gn_auth/auth/db/redis.py b/gn_auth/auth/db/redis.py
new file mode 100644
index 0000000..fdf1d6f
--- /dev/null
+++ b/gn_auth/auth/db/redis.py
@@ -0,0 +1,22 @@
+"""Connections for Redis."""
+import logging
+import traceback
+import contextlib
+from typing import Iterator
+
+from redis import Redis, RedisError, ConnectionError as RedisConnectionError
+
+@contextlib.contextmanager
+def connection(redis_uri) -> Iterator[Redis]:
+    """Connection to redis"""
+    rconn = Redis.from_url(redis_uri, decode_responses=True)
+    try:
+        if not rconn.ping():
+            raise RedisConnectionError("Could not connect to Redis.")
+        yield rconn
+    except RedisError as _rerr:
+        logging.debug(traceback.format_exc())
+        raise
+    finally:
+        rconn.disconnect()
+        rconn.close()