X-Git-Url: https://git.decadent.org.uk/gitweb/?p=dak.git;a=blobdiff_plain;f=dak%2Fupdate_db.py;h=61a1089210295e5ab759d7858e59edc5f4bfb58e;hp=c83459b258a6f97db4c139b426f36cfd2da5de06;hb=245c6549dbacaeab5ee36ec74372b1df8675b477;hpb=38d6fa647e0f9bfcfb60c219ba52473793e3396c

diff --git a/dak/update_db.py b/dak/update_db.py
index c83459b2..61a10892 100755
--- a/dak/update_db.py
+++ b/dak/update_db.py
@@ -37,6 +37,8 @@ import os
 import apt_pkg
 import time
 import errno
+from glob import glob
+from re import findall
 
 from daklib import utils
 from daklib.config import Config
@@ -46,7 +48,6 @@ from daklib.daklog import Logger
 ################################################################################
 
 Cnf = None
-required_database_schema = 80
 
 ################################################################################
 
@@ -120,6 +121,7 @@ Updates dak's database schema to the lastest version. You should disable crontab
         print "Determining dak database revision ..."
         cnf = Config()
         logger = Logger('update-db')
+        modules = []
 
         try:
             # Build a connect string
@@ -155,25 +157,39 @@ Updates dak's database schema to the lastest version. You should disable crontab
             self.update_db_to_zero()
             database_revision = 0
 
+        dbfiles = glob(os.path.join(os.path.dirname(__file__), 'dakdb/update*.py'))
+        required_database_schema = max(map(int, findall('update(\d+).py', " ".join(dbfiles))))
+
         print "dak database schema at %d" % database_revision
         print "dak version requires schema %d"  % required_database_schema
 
-        if database_revision == required_database_schema:
+        if database_revision < required_database_schema:
+            print "\nUpdates to be applied:"
+            for i in range(database_revision, required_database_schema):
+                i += 1
+                dakdb = __import__("dakdb", globals(), locals(), ['update'+str(i)])
+                update_module = getattr(dakdb, "update"+str(i))
+                print "Update %d: %s" % (i, next(s for s in update_module.__doc__.split("\n") if s))
+                modules.append((update_module, i))
+            prompt = "\nUpdate database? (y/N) "
+            answer = utils.our_raw_input(prompt)
+            if answer.upper() != 'Y':
+                sys.exit(0)
+        else:
             print "no updates required"
             logger.log(["no updates required"])
             sys.exit(0)
 
-        for i in range (database_revision, required_database_schema):
+        for module in modules:
+            (update_module, i) = module
             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)
+                message = "updated database schema from %d to %d" % (database_revision, i)
                 print message
                 logger.log([message])
             except DBUpdateError as e:
                 # Seems the update did not work.
-                print "Was unable to update database schema from %d to %d." % (database_revision, i+1)
+                print "Was unable to update database schema from %d to %d." % (database_revision, i)
                 print "The error message received was %s" % (e)
                 logger.log(["DB Schema upgrade failed"])
                 logger.close()