ubuntu-release-upgrader will need to know how to switch snaps between Ubuntu release channels during an upgrade

Bug #1748581 reported by Steve Langasek on 2018-02-10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubuntu-release-upgrader (Ubuntu)

Bug Description

As part of the plan for including snaps in Ubuntu images by default (https://wiki.ubuntu.com/UbuntuSeededSnaps), we intend for the snap installs to be pinned to (possibly empty) per-Ubuntu-release channels in the Snap Store.

This means that as part of a dist upgrade, ubuntu-release-upgrader will need to switch the channels of any relevant installed snaps from the channel for one release, to the channel for the next release, with snap refresh.

(In many cases both channels will be empty and this will involve downloading no new snaps, just changing the pin on the client.)

Since 18.04 is the first release with snaps by default, this doesn't need to be implemented in 18.04; but will need to be supported by the release upgrader in 18.10 at latest.

Steve Langasek (vorlon) on 2018-02-10
Changed in ubuntu-release-upgrader (Ubuntu):
importance: Undecided → High
tags: added: rls-cc-incoming
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