[Bug 2073941] [NEW] lxd-installer should prompt before installing LXD

[Simon Déziel]

Public bug reported:

As reported in https://discourse.ubuntu.com/t/when-an-lxc-command-is-
used-on-a-system-without-lxc-lxd-lxd-is-immediately-installed-should-it-
be-that-way/46570, is is quite easy to accidentally trigger the on-
demand installation of LXD's snap which takes a while.

A better behavior would be for `lxd-installer` to detect if there is a
terminal and if yes, prompt for a confirmation before doing the lengthy
installation process. If no terminal is detect, it should assume that
LXD is to be installed on-demand (current behavior).

** Affects: lxd-installer (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2073941

Title:
  lxd-installer should prompt before installing LXD

Status in lxd-installer package in Ubuntu:
  New

Bug description:
  As reported in https://discourse.ubuntu.com/t/when-an-lxc-command-is-
  used-on-a-system-without-lxc-lxd-lxd-is-immediately-installed-should-
  it-be-that-way/46570, is is quite easy to accidentally trigger the on-
  demand installation of LXD's snap which takes a while.

  A better behavior would be for `lxd-installer` to detect if there is a
  terminal and if yes, prompt for a confirmation before doing the
  lengthy installation process. If no terminal is detect, it should
  assume that LXD is to be installed on-demand (current behavior).

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