Fix lxc-info state regex for recent lxc versions

[fpletz]

Recent versions of lxc-info (some pre-1.0 alpha or beta) use a different output format than prior versions (0.9).

Instead of

state:RUNNING

the output is now

State:          RUNNING

This patches adjusts the regex that parses this output to match both output formats and adds a unit test.

See the lxc code at https://github.com/lxc/lxc/blob/master/src/lxc/lxc_info.c#L303 for reference.

[fgrehm]

Thanks! There are other PRs targetting that and I'll try to merge yours or one of them and cut a new release as soon as I have a chance :-)

[fgrehm]

Oh sorry, actually this has been merged with #197, I'll keep this around as I want to bring those specs in :-) If you are interested on building the plugin from sources, please have a look at the next branch of the project.

Thanks!

[fgrehm]

I've added a spec to make sure the state detection is case insentive and I pushed to the next branch. I'll keep working on things from that branch and I hope to cut a new release soon :-)

Thanks for putting up this PR!

[fpletz]

Thanks for merging and your explanations. I have some more fixes for current versions of LXC which I hope to get in shape to submit a PR soon.

[fgrehm]

Oh, the plugin is broken on latest 1.0 beta? :-( I've set up a Saucy VBox VM with 1.0 beta3 to try things out but haven't had a chance to do that yet.

Just so you know, the next version of the plugin will be the last one to support vagrant < 1.4 and it would be great to have it working without issues with recent lxc versions so that people are not forced to upgrade their vagrant installations. If you are able to submit that PR or LMK what problems you are facing over there it'll be awesome :-)

[fpletz]

It's not really broken on recent betas, we just need to work around some odd behaviour changes. I've opened #222 with the one that annoys me most.