[dak/master] Port database.get_or_set_keyring_id => dbconn.get_or_set_keyring

[Chris Lamb <lamby@debian.org>]

Signed-off-by: Chris Lamb <lamby@debian.org>
---
 daklib/dbconn.py |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/daklib/dbconn.py b/daklib/dbconn.py
index 23aeda6..c0b7d0e 100755
--- a/daklib/dbconn.py
+++ b/daklib/dbconn.py
@@ -981,6 +981,42 @@ class Keyring(object):
 
 __all__.append('Keyring')
 
+def get_or_set_keyring(keyring, session=None):
+    """
+    If C{keyring} does not have an entry in the C{keyrings} table yet, create one
+    and return the new Keyring
+    If C{keyring} already has an entry, simply return the existing Keyring
+
+    @type keyring: string
+    @param keyring: the keyring name
+
+    @rtype: Keyring
+    @return: the Keyring object for this keyring
+
+    """
+    privatetrans = False
+    if session is None:
+        session = DBConn().session()
+        privatetrans = True
+
+    try:
+        obj = session.query(Keyring).filter_by(keyring_name=keyring).first()
+
+        if obj is None:
+            obj = Keyring(keyring_name=keyring)
+            session.add(obj)
+            if privatetrans:
+                session.commit()
+            else:
+                session.flush()
+
+        return obj
+    finally:
+        if privatetrans:
+            session.close()
+
+__all__.append('get_or_set_keyring')
+
 ################################################################################
 
 class Location(object):
-- 
1.5.6.5