Rev 3352: (mbp) LockableFiles.__del__ should just warn, not auto-unlock in file:///home/pqm/archives/thelove/bzr/%2Btrunk/

Canonical.com Patch Queue Manager pqm at pqm.ubuntu.com
Thu Apr 10 07:03:43 BST 2008


At file:///home/pqm/archives/thelove/bzr/%2Btrunk/

------------------------------------------------------------
revno: 3352
revision-id:pqm at pqm.ubuntu.com-20080410060333-ws6qe72jt38gs6lu
parent: pqm at pqm.ubuntu.com-20080410040830-5zcdt8ub29i9f2q8
parent: mbp at sourcefrog.net-20080410025707-8uwd2jdig77ihvsi
committer: Canonical.com Patch Queue Manager <pqm at pqm.ubuntu.com>
branch nick: +trunk
timestamp: Thu 2008-04-10 07:03:33 +0100
message:
  (mbp) LockableFiles.__del__ should just warn, not auto-unlock
modified:
  NEWS                           NEWS-20050323055033-4e00b5db738777ff
  bzrlib/lockable_files.py       control_files.py-20051111201905-bb88546e799d669f
    ------------------------------------------------------------
    revno: 3296.1.4
    revision-id:mbp at sourcefrog.net-20080410025707-8uwd2jdig77ihvsi
    parent: mbp at sourcefrog.net-20080410024112-5qhikyu623dqjgsc
    committer: Martin Pool <mbp at sourcefrog.net>
    branch nick: lock-warnings
    timestamp: Thu 2008-04-10 12:57:07 +1000
    message:
      Update news for LockableFiles gc
    modified:
      NEWS                           NEWS-20050323055033-4e00b5db738777ff
    ------------------------------------------------------------
    revno: 3296.1.3
    revision-id:mbp at sourcefrog.net-20080410024112-5qhikyu623dqjgsc
    parent: mbp at sourcefrog.net-20080409023218-js7bteu4qrdn3coe
    parent: pqm at pqm.ubuntu.com-20080409233555-n26cmi0y1hb98tf6
    committer: Martin Pool <mbp at sourcefrog.net>
    branch nick: lock-warnings
    timestamp: Thu 2008-04-10 12:41:12 +1000
    message:
      merge trunk
    added:
      bzrlib/tests/test_mutabletree.py test_mutabletree.py-20080405014429-2v0cdi3re320p8db-1
      bzrlib/tests/test_uncommit.py  test_uncommit.py-20080316104338-y3gxu67g5m2qih10-1
      bzrlib/transport/nosmart.py    nosmart.py-20080402095843-6ib17idympwy1zkr-1
      doc/developers/integration.txt integration.txt-20080404022341-2lorxocp1in07zij-1
      doc/developers/plugin-api.txt  pluginapi.txt-20080229110225-q2j5y4agqhlkjn0s-1
    renamed:
      bzrlib/tests/test_revisionnamespaces.py => bzrlib/tests/test_revisionspec.py testrevisionnamespaces.py-20050711050225-8b4af89e6b1efe84
    modified:
      NEWS                           NEWS-20050323055033-4e00b5db738777ff
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      bzrlib/tests/test_versionedfile.py test_versionedfile.py-20060222045249-db45c9ed14a1c2e5
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      bzrlib/weave.py                knit.py-20050627021749-759c29984154256b
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      bzrlib/workingtree_4.py        workingtree_4.py-20070208044105-5fgpc5j3ljlh5q6c-1
      doc/developers/HACKING.txt     HACKING-20050805200004-2a5dc975d870f78c
      doc/developers/index.txt       index.txt-20070508041241-qznziunkg0nffhiw-1
      doc/developers/repository.txt  repository.txt-20070709152006-xkhlek456eclha4u-1
      doc/en/user-guide/annotating_changes.txt annotating_changes.t-20071122141511-0knao2lklsdsvb1q-1
      doc/en/user-guide/bazaar_workflows.txt bazaar_workflows.txt-20071114035000-q36a9h57ps06uvnl-1
      doc/en/user-guide/core_concepts.txt core_concepts.txt-20071114035000-q36a9h57ps06uvnl-2
      doc/en/user-guide/http_smart_server.txt fastcgi.txt-20061005091552-rz8pva0olkxv0sd8-3
      doc/en/user-guide/installing_bazaar.txt installing_bazaar.tx-20071114035000-q36a9h57ps06uvnl-4
      doc/en/user-guide/introducing_bazaar.txt introducing_bazaar.t-20071114035000-q36a9h57ps06uvnl-5
      doc/en/user-guide/partner_intro.txt partner_workflow.txt-20071122141511-0knao2lklsdsvb1q-4
      doc/en/user-guide/undoing_mistakes.txt undoing_mistakes.txt-20071121092300-8fyacngt1w98e5mp-1
      bzrlib/tests/test_revisionspec.py testrevisionnamespaces.py-20050711050225-8b4af89e6b1efe84
    ------------------------------------------------------------
    revno: 3296.1.2
    revision-id:mbp at sourcefrog.net-20080409023218-js7bteu4qrdn3coe
    parent: mbp at sourcefrog.net-20080319015416-e4itv3rnisq1064z
    committer: Martin Pool <mbp at sourcefrog.net>
    branch nick: lock-warnings
    timestamp: Wed 2008-04-09 12:32:18 +1000
    message:
      LockableFiles should warn but not automatically unlock
    modified:
      bzrlib/lockable_files.py       control_files.py-20051111201905-bb88546e799d669f
    ------------------------------------------------------------
    revno: 3296.1.1
    revision-id:mbp at sourcefrog.net-20080319015416-e4itv3rnisq1064z
    parent: pqm at pqm.ubuntu.com-20080318200038-jo7mqokvib9aojt9
    committer: Martin Pool <mbp at sourcefrog.net>
    branch nick: lock-warnings
    timestamp: Wed 2008-03-19 12:54:16 +1100
    message:
      If LockableFiles is destroyed while locked, just mutter
    modified:
      bzrlib/lockable_files.py       control_files.py-20051111201905-bb88546e799d669f
=== modified file 'NEWS'
--- a/NEWS	2008-04-10 02:32:51 +0000
+++ b/NEWS	2008-04-10 06:03:33 +0000
@@ -231,6 +231,13 @@
 
   INTERNALS:
 
+    * If a ``LockableFiles`` object is not explicitly unlocked (for example
+      because of a missing ``try/finally`` block, it will give a warning but
+      not automatically unlock itself.  (Previously they did.)  This
+      sometimes caused knock-on errors if for example the network connection
+      had already failed, and should not be relied upon by code. 
+      (Martin Pool, #109520)
+
     * The ``read_response_tuple`` method of ``SmartClientRequestProtocol*``
       classes will now raise ``UnknownSmartMethod`` when appropriate, so that
       callers don't need to try distinguish unknown request errors from other

=== modified file 'bzrlib/lockable_files.py'
--- a/bzrlib/lockable_files.py	2007-12-13 20:17:06 +0000
+++ b/bzrlib/lockable_files.py	2008-04-09 02:32:18 +0000
@@ -1,4 +1,4 @@
-# Copyright (C) 2005, 2006 Canonical Ltd
+# Copyright (C) 2005, 2006, 2008 Canonical Ltd
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,6 +17,7 @@
 from cStringIO import StringIO
 import codecs
 #import traceback
+from warnings import warn
 
 import bzrlib
 from bzrlib.decorators import (needs_read_lock,
@@ -104,11 +105,9 @@
 
     def __del__(self):
         if self.is_locked():
-            # XXX: This should show something every time, and be suitable for
-            # headless operation and embedding
-            from warnings import warn
-            warn("file group %r was not explicitly unlocked" % self)
-            self._lock.unlock()
+            # do not automatically unlock; there should have been a
+            # try/finally to unlock this.
+            warn("%r was gc'd while locked" % self)
 
     def break_lock(self):
         """Break the lock of this lockable files group if it is held.




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