Prior to this commit, if a user passed in a script that was frozen,
the shell provisioner would fail to modify the script to replace line
endings for windows because the string was immutable. This commit fixes
that by dup'ing the string so that it can have its line endings replaced
Allows checksum validation on downloaded files via Util::Downloader
using MD5 and/or SHA1 checksums. This also integrates checksum validation
support with the shell provisioner for downloaded remote files.
of `args` itself and as an element inside of an `args` array. Added validation
around passing in arrays for arguments. Just knowing that it is an array is not
enough, because arrays can contain any other type.
The logic change in 57d4775140 introduced
a bug where neither strings nor arrays provided as `args` for shell
provisioners would pass validation.
This fixes that problem along with a few extras:
- split out arg validation into a private method
- update comment describing valid args
- add a few unit tests around config validation