[Bug 1502291] [NEW] 'do-release-upgrade -d' should always offer to upgrade to the most recent development release

[Mathew Hodson]

Public bug reported:

On Trusty, 'do-release-upgrade -d' is currently offering an upgrade to
14.10. It should offer to upgrade to Wily, because Wily is the current
development release.

It makes sense if we are skipping versions for stable releases to also
skip versions for development releases. The code in update-manager
parses the meta-release files to determine which release to upgrade. As
an example here is the meta-release-development entry for Utopic.

Dist: utopic
Name: Utopic Unicorn
Version: 14.10
Date: Thu, 23 Oct 2014 14:10:00 UTC
Supported: 0
Description: This is the 14.10 release
Release-File: http://archive.ubuntu.com/ubuntu/dists/utopic/Release
ReleaseNotes: http://changelogs.ubuntu.com/EOLReleaseAnnouncement
UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/utopic/main/dist-upgrader-all/current/utopic.tar.gz
UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/utopic/main/dist-upgrader-all/current/utopic.tar.gz.gpg

We currently just check the date and supported status to determine to
which release to upgrade, as the meta release files don't really contain
information about whether or not a release is obsolete. If we are
running with the -d switch we could check to see if the release date is
greater than today. There should probably be a fudge factor of a day
though as otherwise people may not be able to upgrade on release day.

** Affects: update-manager (Ubuntu)
     Importance: Low
         Status: New


** Tags: trusty

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

** Changed in: ubuntu-release-upgrader (Ubuntu)
     Assignee: Brian Murray (brian-murray) => (unassigned)

** Package changed: ubuntu-release-upgrader (Ubuntu) => update-manager
(Ubuntu)

** Description changed:

  On Trusty, 'do-release-upgrade -d' is currently offering an upgrade to
  14.10. It should offer to upgrade to Wily, because Wily is the current
  development release.
  
  It makes sense if we are skipping versions for stable releases to also
  skip versions for development releases. The code in update-manager
  parses the meta-release files to determine which release to upgrade. As
- an example here is the meta-release-development entry for utopic.
+ an example here is the meta-release-development entry for Utopic.
  
  Dist: utopic
  Name: Utopic Unicorn
  Version: 14.10
  Date: Thu, 23 Oct 2014 14:10:00 UTC
  Supported: 0
  Description: This is the 14.10 release
  Release-File: http://archive.ubuntu.com/ubuntu/dists/utopic/Release
  ReleaseNotes: http://changelogs.ubuntu.com/EOLReleaseAnnouncement
  UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/utopic/main/dist-upgrader-all/current/utopic.tar.gz
  UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/utopic/main/dist-upgrader-all/current/utopic.tar.gz.gpg
  
  We currently just check the date and supported status to determine to
  which release to upgrade, as the meta release files don't really contain
  information about whether or not a release is obsolete. If we are
  running with the -d switch we could check to see if the release date is
  greater than today. There should probably be a fudge factor of a day
  though as otherwise people may not be able to upgrade on release day.

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https://bugs.launchpad.net/bugs/1502291

Title:
  'do-release-upgrade -d' should always offer to upgrade to the most
  recent development release

Status in update-manager package in Ubuntu:
  New

Bug description:
  On Trusty, 'do-release-upgrade -d' is currently offering an upgrade to
  14.10. It should offer to upgrade to Wily, because Wily is the current
  development release.

  It makes sense if we are skipping versions for stable releases to also
  skip versions for development releases. The code in update-manager
  parses the meta-release files to determine which release to upgrade.
  As an example here is the meta-release-development entry for Utopic.

  Dist: utopic
  Name: Utopic Unicorn
  Version: 14.10
  Date: Thu, 23 Oct 2014 14:10:00 UTC
  Supported: 0
  Description: This is the 14.10 release
  Release-File: http://archive.ubuntu.com/ubuntu/dists/utopic/Release
  ReleaseNotes: http://changelogs.ubuntu.com/EOLReleaseAnnouncement
  UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/utopic/main/dist-upgrader-all/current/utopic.tar.gz
  UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/utopic/main/dist-upgrader-all/current/utopic.tar.gz.gpg

  We currently just check the date and supported status to determine to
  which release to upgrade, as the meta release files don't really
  contain information about whether or not a release is obsolete. If we
  are running with the -d switch we could check to see if the release
  date is greater than today. There should probably be a fudge factor of
  a day though as otherwise people may not be able to upgrade on release
  day.

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