[Bug 854841] Re: add-apt-repository will write duplicate entries to /etc/apt/sources.list

[Kyle Stevens]

@Brian Murray - This still seems to be a problem in trusty (14.04).

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https://bugs.launchpad.net/bugs/854841

Title:
  add-apt-repository will write duplicate entries to
  /etc/apt/sources.list

Status in “software-properties” package in Ubuntu:
  Fix Released

Bug description:
  Hello,
  Add-apt-repository command allows one to add duplicate entries to sources list. Would it be possible to improve this utility it so it adds only unique entries?

  Eg. This command, when run twice, adds duplicate entries.
  $ sudo add-apt-repository "deb http://archive.canonical.com/ubuntu oneiric partner

  $ grep -Ri partner /etc/apt/sources.list

  ProblemType: BugDistroRelease: Ubuntu 11.10
  Package: python-software-properties 0.81.9
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
  Date: Tue Sep 20 18:38:17 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110919)
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bashSourcePackage: software-properties
  UpgradeStatus: No upgrade log present (probably fresh install)

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