update to oneiric quit due to missing btrfs

[Hans Bakker]

Traceback (most recent call last):

  File "/tmp/update-manager-3uvvzV/oneiric", line 7, in <module>
    sys.exit(main())

  File "/tmp/update-manager-3uvvzV/DistUpgradeMain.py", line 202, in main
    if app.run():

  File "/tmp/update-manager-3uvvzV/DistUpgradeController.py", line 1642, in run
    return self.fullUpgrade()

  File "/tmp/update-manager-3uvvzV/DistUpgradeController.py", line 1612, in fullUpgrade
    if not self.doDistUpgrade():

  File "/tmp/update-manager-3uvvzV/DistUpgradeController.py", line 1006, in doDistUpgrade
    self._maybe_create_apt_btrfs_snapshot()

  File "/tmp/update-manager-3uvvzV/DistUpgradeController.py", line 990, in _maybe_create_apt_btrfs_snapshot
    res = apt_btrfs.create_btrfs_root_snapshot(prefix)

  File "/tmp/update-manager-3uvvzV/apt_btrfs_snapshot.py", line 122, in create_btrfs_root_snapshot
    os.path.join(mp, self.SNAP_PREFIX+additional_prefix+snap_id))

  File "/tmp/update-manager-3uvvzV/apt_btrfs_snapshot.py", line 69, in btrfs_subvolume_snapshot
    source, dest])

  File "/usr/lib/python2.7/subprocess.py", line 486, in call
    return Popen(*popenargs, **kwargs).wait()

  File "/usr/lib/python2.7/subprocess.py", line 672, in __init__
    errread, errwrite)

  File "/usr/lib/python2.7/subprocess.py", line 1213, in _execute_child
    raise child_exception

OSError: [Errno 2] File or directory does not exist

[Eduard Hasenleithner (eduard-hasenleithner)]

Apparently, "/tmp/update-manager-xxx/apt-btrfs_snapshot.py" does not check the existence of the "btrfs" tool and tries to call it unconditionally. After doing a "apt-get install btrfs-utils" - I don't have any btrfs partition - the upgrade continues.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

As far as I can tell apt_btrfs_snapshot is copied into update-manager at build time so its actually the apt-btrfs-snapshot where the fix will need to be made.

[Brian Murray (brian-murray)]

apt-btrfs-utils depends on btrfs but update-manager doesn't.

[Launchpad Janitor (janitor)]

This bug was fixed in the package apt-btrfs-snapshot - 0.2.1

---------------
apt-btrfs-snapshot (0.2.1) oneiric; urgency=low

  * test/test_apt_btrfs_snapshot.py, test/data/fstab.bug872145:
    - fix crash in fstab parsing (LP: #872145)
  * apt_btrfs_snapshot.py:
    - test for /sbin/btrfs in snapshot_supported() as well (LP: #800908)
 -- Michael Vogt <email address hidden> Tue, 11 Oct 2011 10:17:41 +0200