[dak/master] Add logging to update-db including transaction id.

[Torsten Werner <twerner@debian.org>]

Signed-off-by: Torsten Werner <twerner@debian.org>
---
 dak/update_db.py |   23 ++++++++++++++++++++++-
 1 files changed, 22 insertions(+), 1 deletions(-)

diff --git a/dak/update_db.py b/dak/update_db.py
index 540667f..6322917 100755
--- a/dak/update_db.py
+++ b/dak/update_db.py
@@ -41,6 +41,7 @@ import errno
 from daklib import utils
 from daklib.config import Config
 from daklib.dak_exceptions import DBUpdateError
+from daklib.daklog import Logger
 
 ################################################################################
 
@@ -102,10 +103,23 @@ Updates dak's database schema to the lastest version. You should disable crontab
 
 ################################################################################
 
+    def get_transaction_id(self):
+        '''
+        Returns the current transaction id as a string.
+        '''
+        cursor = self.db.cursor()
+        cursor.execute("SELECT txid_current();")
+        id = cursor.fetchone()[0]
+        cursor.close()
+        return id
+
+################################################################################
+
     def update_db(self):
         # Ok, try and find the configuration table
         print "Determining dak database revision ..."
         cnf = Config()
+        logger = Logger(cnf.Cnf, 'update-db')
 
         try:
             # Build a connect string
@@ -120,6 +134,7 @@ Updates dak's database schema to the lastest version. You should disable crontab
             pass
 
         database_revision = int(self.get_db_rev())
+        logger.log(['transaction id before update: %s' % self.get_transaction_id()])
 
         if database_revision == -1:
             print "dak database schema predates update-db."
@@ -140,20 +155,26 @@ Updates dak's database schema to the lastest version. You should disable crontab
 
         if database_revision == required_database_schema:
             print "no updates required"
+            logger.log(["no updates required"])
             sys.exit(0)
 
         for i in range (database_revision, required_database_schema):
-            print "updating database schema from %d to %d" % (database_revision, i+1)
             try:
                 dakdb = __import__("dakdb", globals(), locals(), ['update'+str(i+1)])
                 update_module = getattr(dakdb, "update"+str(i+1))
                 update_module.do_update(self)
+                message = "updated database schema from %d to %d" % (database_revision, i+1)
+                print message
+                logger.log([message])
             except DBUpdateError, e:
                 # Seems the update did not work.
                 print "Was unable to update database schema from %d to %d." % (database_revision, i+1)
                 print "The error message received was %s" % (e)
+                logger.log(["DB Schema upgrade failed"])
+                logger.close()
                 utils.fubar("DB Schema upgrade failed")
             database_revision += 1
+        logger.close()
 
 ################################################################################
 
-- 
1.7.2.5