[Bug 1160048] [NEW] add-apt-repository won't uncomment a commented-out source

[Alan Pope ㋛]

Public bug reported:

Assume you're frequently testing software, so you add, remove (purge)
and re-add PPAs.

sudo add-apt-repository lp:someteam/ppa
sudo apt-get uppdate
sudo apt-get install someprogram

... time passes and you no longer need that program, or wish to test
your system without it ..

sudo ppa-purge lp:someteam/ppa

This will remove the ppa by commenting out the "deb ..." line in the
sources file in /etc/apt/sources.list.d

Later, you need to do more testing of the app or some other app from the
same ppa so you re-add it:-

sudo add-apt-repository lp:someteam/ppa

However, this does _not_ add the PPA because the line/file already
exists, albeit with a # in front of the "deb ...".

Some might argue that it is the fault of ppa-purge for commenting the
line out. I disagree. I believe ppa-purge _should_ comment out the "deb
..." line because sometimes you want to go back to the file to remind
yourself what the ppa was that you got something from, or to just
manually re-enable it.

Given the single role of add-apt-repository is to add a ppa, I'd
conclude it's add-apt-repository which is broken, given it doesn't add
one in this common scenario.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: software-properties-common 0.92.17
ProcVersionSignature: Ubuntu 3.8.0-14.24-generic 3.8.4
Uname: Linux 3.8.0-14-generic x86_64
ApportVersion: 2.9.2-0ubuntu4
Architecture: amd64
Date: Mon Mar 25 21:39:42 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-06-29 (269 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: software-properties
UpgradeStatus: Upgraded to raring on 2013-01-18 (66 days ago)

** Affects: software-properties (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug raring

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https://bugs.launchpad.net/bugs/1160048

Title:
  add-apt-repository won't uncomment a commented-out source

Status in “software-properties” package in Ubuntu:
  New

Bug description:
  Assume you're frequently testing software, so you add, remove (purge)
  and re-add PPAs.

  sudo add-apt-repository lp:someteam/ppa
  sudo apt-get uppdate
  sudo apt-get install someprogram

  ... time passes and you no longer need that program, or wish to test
  your system without it ..

  sudo ppa-purge lp:someteam/ppa

  This will remove the ppa by commenting out the "deb ..." line in the
  sources file in /etc/apt/sources.list.d

  Later, you need to do more testing of the app or some other app from
  the same ppa so you re-add it:-

  sudo add-apt-repository lp:someteam/ppa

  However, this does _not_ add the PPA because the line/file already
  exists, albeit with a # in front of the "deb ...".

  Some might argue that it is the fault of ppa-purge for commenting the
  line out. I disagree. I believe ppa-purge _should_ comment out the
  "deb ..." line because sometimes you want to go back to the file to
  remind yourself what the ppa was that you got something from, or to
  just manually re-enable it.

  Given the single role of add-apt-repository is to add a ppa, I'd
  conclude it's add-apt-repository which is broken, given it doesn't add
  one in this common scenario.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: software-properties-common 0.92.17
  ProcVersionSignature: Ubuntu 3.8.0-14.24-generic 3.8.4
  Uname: Linux 3.8.0-14-generic x86_64
  ApportVersion: 2.9.2-0ubuntu4
  Architecture: amd64
  Date: Mon Mar 25 21:39:42 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2012-06-29 (269 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: software-properties
  UpgradeStatus: Upgraded to raring on 2013-01-18 (66 days ago)

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