[Bug 1841225] [NEW] deb to snap transition uses an ubuntu release channel for the core18 snap

[Brian Murray]

Public bug reported:

The release upgrader (DistUpgradeQuirks.py) tries to run the following
command when upgrading a system without snaps installed to Ubuntu 19.10
(eoan):

snap install --channel stable/ubuntu-19.10 core18

This channel does not exist and the release upgrade will fail e.g.:

2019-08-23 03:24:45,533 DEBUG quirks: running eoanPostUpgrade
2019-08-23 03:24:45,533 DEBUG running Quirks.eoanPostUpgrade
2019-08-23 03:24:51,547 DEBUG install of snap core18 failed
2019-08-23 03:25:51,348 DEBUG install of snap gnome-3-28-1804 succeeded

The quirk should be updated so that an ubuntu release channel is not
used when installing the core18 snap.

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: High
         Status: Triaged

** Affects: ubuntu-release-upgrader (Ubuntu Eoan)
     Importance: High
         Status: Triaged


** Tags: eoan

** Tags added: eoan

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Triaged

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => High

** Also affects: ubuntu-release-upgrader (Ubuntu Eoan)
   Importance: High
       Status: Triaged

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https://bugs.launchpad.net/bugs/1841225

Title:
  deb to snap transition uses an ubuntu release channel for the core18
  snap

Status in ubuntu-release-upgrader package in Ubuntu:
  Triaged
Status in ubuntu-release-upgrader source package in Eoan:
  Triaged

Bug description:
  The release upgrader (DistUpgradeQuirks.py) tries to run the following
  command when upgrading a system without snaps installed to Ubuntu
  19.10 (eoan):

  snap install --channel stable/ubuntu-19.10 core18

  This channel does not exist and the release upgrade will fail e.g.:

  2019-08-23 03:24:45,533 DEBUG quirks: running eoanPostUpgrade
  2019-08-23 03:24:45,533 DEBUG running Quirks.eoanPostUpgrade
  2019-08-23 03:24:51,547 DEBUG install of snap core18 failed
  2019-08-23 03:25:51,348 DEBUG install of snap gnome-3-28-1804 succeeded

  The quirk should be updated so that an ubuntu release channel is not
  used when installing the core18 snap.

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