[Bug 1539352] Re: Removed clicks come back on OTA update

[Jean-Baptiste Lallement]

It seems to be part of the original click databases design [1] and taken
into consideration from day 1.

"[...]
There was an idea early on that we'd deal with preinstalled apps by going
round and registering them all for all active users on first boot.  This
would have lots of problems for the packaging system, though.  Most notably,
doing it that way makes it hard for a user to remove an app and make it
stick, *because it would tend to reappear on system updates*.
[...]"

Understanding why the original idea is not part of the current
implementation would be a good starting point IMHO.

[1] http://bazaar.launchpad.net/~ubuntu-
branches/ubuntu/vivid/click/vivid/view/head:/doc/databases.rst

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https://bugs.launchpad.net/bugs/1539352

Title:
  Removed clicks come back on OTA update

Status in Canonical System Image:
  Confirmed
Status in click package in Ubuntu:
  New

Bug description:
  I have a krillin which was on OTA8.5.
  I removed every single click on the device, so all that's left are the deb based apps (phone, browser, contacts, messaging, system settings and sd card thing).

  I had removed all the clicks using "sudo click unregister foo 1.0" for
  each click.

  I updated to OTA9 and loads of previously removed apps have come back.

  This should not happen (IMO).

  Attached screenshot showing the applications which came back.

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