[Bug 635427] Re: Adding ppa does not work properly on downstream distros based on Ubuntu

[Raony Guimarães]

How can I help to move this feature forward?

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https://bugs.launchpad.net/bugs/635427

Title:
  Adding ppa does not work properly on downstream distros based on
  Ubuntu

Status in software-properties package in Ubuntu:
  Confirmed

Bug description:
  When adding a PPA using the "sudo add-apt-repository ppa:ppa-name"
  command, the distribution codename specified in /etc/lsb-release is
  used when adding the entry to /etc/apt/sources.list.   Unfortunately,
  this has the side effect of causing the add PPA functionality to not
  work properly on downstream distros who ship with their own codename
  -- the user must manually change the incorrect distribution entry to
  the relevant Ubuntu one and refresh the package repos before using the
  PPA.

  Downstream distros wishing to use their own repos alongside the Ubuntu
  ones must provide a unique distribution codename in their mirrors file
  in /usr/share/python-apt/templates, otherwise software-properties-gtk
  thinks the downstream distro's repository is a mirror of the Ubuntu
  one, and forces the user choose between them.

  A better solution that would solve both needs would be add a check to
  the add PPA process:

  When adding a PPA, check the current distribution codename against a
  set of known official Ubuntu codenames.  If they match, continue as
  before.  If they do not match, default to using the Ubuntu codename
  current for the installed version of software-properties package.

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