[Bug 1466099] [NEW] tools/maas2roottar doesn't exit non-zero if mount-image-callback is not installed

[Ryan Harper]

Public bug reported:

I'm using maas2roottar to unpack the maas image in a script like so:

       curtin/tools/maas2roottar $ephimg $roottar
        [ "$?" != "0" ] && {
            log "ERROR: Failed to convert ephemeral to roottar";
            return 1;
        }


But on a system that didn't have mount-image-callback from cloud-image-utils package, maas2roottar did not exit zero:

 /home/adam/download/curtin/tools/maas2roottar /home/adam/download/maas/daily/wily/amd64/20150612/root-image.gz /home/adam/download/maas/daily/wily/amd64/20150612/root.tar.gz
sudo: mount-image-callback: command not found
+ '[' 0 '!=' 0 ']'

looking at the call in maas2roottar; it just needs a check on the return
code of mount-image-callback


    $sudo mount-image-callback "$img" -- "$0" create-tgz \
        ${vflags} "${pt[@]}" _MOUNTPOINT_ "$output"


1.  % lsb_release -rd
Description:	Ubuntu 14.04.2 LTS
Release:	14.04

2.  % bzr info
Standalone tree (format: 2a)
Location:
  branch root: .

Related branches:
  parent branch: bzr+ssh://bazaar.launchpad.net/+branch/curtin/
(foudres) curtin % bzr revno
214

3.  maas2roottar return non-zero if mount-image-callback command is not
available

4. maas2roottar did not exit non-zero on system witout mount-image-
callback installed.

** Affects: curtin (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1466099

Title:
  tools/maas2roottar doesn't exit non-zero if mount-image-callback is
  not installed

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