Comment 7 for bug 1053008

With live-build 3.0~a57-1ubuntu4, keeping chroot/var/lib/apt/lists except -{updates,security,proposed} seems a default behavior.

The motivation of introducing --keep-apt was working apport on live-session (Bug #942180) as far as I understand.
Now working it with a development release by default.

With a point release like Ubuntu 12.04.1 LTS, apport does not work on live session to -{updates,security,proposed} packages, but it's not an ubuntu-defaults-builder specific issue.
the official Ubuntu 12.04 LTS image also does not have -{updates,security,proposed} indices, so I can reproduce the apport-not-working issue by executing `ubuntu-bug base-files`.

$ apt-cache policy base-files
base-files:
  Installed: 6.5ubuntu6.2
  Candidate: 6.5ubuntu6.2
  Version table:
 *** 6.5ubuntu6.2 0
        100 /var/lib/dpkg/status
     6.5ubuntu6 0
        500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

so my conclusion is:
 1. --keep-apt is now the default behavior.
     if someone wants all indices removed, LB_APT_INDICES=false can be passed by --remove-apt or something.
     apport is still not working to -{updates,security,proposed} packages, but it's not an ubuntu-defaults-builder specific issue.

 2. if someone wants --keep-apt-components behavior, we need a new hook after `lb_chroot_archives chroot remove`.

Please correct me if I'm wrong.