opscode/omnibus — pull request #329 by sethvargo (2014-08-25 20:29:32+00:00)
Title: Raise custom errors when a shell command fails

Looks like this:

```text
The following shell command exited with status 32:

$ I_LOVE_YOU=barney TICKLE_ME=elmo evil command

Output:

command failed

Error:

The quick brown fox did not jump over the barn!
```

Fixes #322