0 byte builds cause a silent exit

[btm]

Version:

3.11.18

Environment:

Mac OS Mojave 10.14.5

Scenario:

The build is 0 bytes, but since we exit the same way for an error and a zero byte file, that is difficult to determine.

Steps to Reproduce:

mixlib-install install-script | sudo bash -s -- -P inspec -d /tmp -l https://packages.chef.io/files/unstable/inspec/4.7.23/mac_os_x/10.14/inspec-4.7.23-1.dmg

Expected Result:

An error is raised that the build is 0 bytes

Actual Result:

The stderr output of all the tools is raised, which don't appear incorrect unless you notice the size.

mixlib-install/lib/mixlib/install/generator/bourne/scripts/helpers.sh.erb

Line 128 in 93b25ce

if test $rc -ne 0 || test ! -s "$2"; then