[Bug 1267367] [NEW] lxc-create shouldn't create container when template is called with --help argument

[Jean-Baptiste Lallement]

Public bug reported:

When option --help is passed as template argument, lxc-create creates
the base directory structure of the container. Then next call to lxc-
create with the same name will fail because the container already
exists.

TEST CASE:
1. $ sudo lxc-create -n test--help -t ubuntu -- -h
[...]
output of lxc-ubuntu -h
[...]

$ sudo lxc-create -n test--help -t ubuntu -- -a amd64
Container already exists

EXPECTED RESULT
Container is not created and another call to lxc-create with the same name can be executed.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lxc 1.0.0~beta1-0ubuntu3
ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
Uname: Linux 3.12.0-7-generic x86_64
ApportVersion: 2.12.7-0ubuntu6
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Jan  9 09:19:01 2014
SourcePackage: lxc
UpgradeStatus: Upgraded to trusty on 2012-01-31 (708 days ago)
defaults.conf:
 lxc.network.type = veth
 lxc.network.link = lxcbr0
 lxc.network.flags = up

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


** Tags: amd64 apparmor apport-bug trusty

** Description changed:

  When option --help is passed as template argument, lxc-create creates
  the base directory structure of the container. Then next call to lxc-
  create with the same name will fail because the container already
  exists.
  
  TEST CASE:
  1. $ sudo lxc-create -n test--help -t ubuntu -- -h
  [...]
  output of lxc-ubuntu -h
  [...]
  
  $ sudo lxc-create -n test--help -t ubuntu -- -a amd64
  Container already exists
  
  EXPECTED RESULT
- Container is not create and another call to lxc-create with the same name can be executed.
+ Container is not created and another call to lxc-create with the same name can be executed.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: lxc 1.0.0~beta1-0ubuntu3
  ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
  Uname: Linux 3.12.0-7-generic x86_64
  ApportVersion: 2.12.7-0ubuntu6
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Jan  9 09:19:01 2014
  SourcePackage: lxc
  UpgradeStatus: Upgraded to trusty on 2012-01-31 (708 days ago)
  defaults.conf:
-  lxc.network.type = veth
-  lxc.network.link = lxcbr0
-  lxc.network.flags = up
+  lxc.network.type = veth
+  lxc.network.link = lxcbr0
+  lxc.network.flags = up

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https://bugs.launchpad.net/bugs/1267367

Title:
  lxc-create shouldn't create container when template is called with
  --help argument

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