Updated omnibus postinst script to symlink to appbundle created bin…

…stubs (#2732)

* Updated `postinst` script to symlink to appbundle created binstubs
rather than rubygems binstubs in embedded directory.

The rubygems binstubs do not account for GEM_HOME or GEM_PATHS existing
in the invoking shell. This creates problems on systems with multiple
ruby versions. If GEM_HOME or GEM_PATH is set the rubygems embedded
binstubs will attempt to use this external gem source which will
generally result in errors for the user.

Signed-off-by: Miah Johnson <miah@chia-pet.org>

ci/verify-inspec.bat

@@ -0,0 +1,9 @@
+@ECHO OFF
+
+REM ; Set GEM_HOME and GEM_PATH to verify our appbundle inspec shim is correctly
+REM ; removing them from the environment while launching from our embedded ruby.
+SET GEM_HOME=C:\SHOULD_NOT_EXIST
+SET GEM_PATH=C:\SHOULD_NOT_EXIST
+
+cd C:\opscode\inspec\bin
+inspec version

ci/verify-inspec.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -evx
+
+# Set GEM_HOME and GEM_PATH to verify our appbundle inspec shim is correctly
+# removing them from the environment while launching from our embedded ruby.
+export GEM_HOME=/SHOULD_NOT_EXIST
+export GEM_PATH=/SHOULD_NOT_EXIST
+
+export PATH=$PATH:/usr/local/bin
+inspec version

omnibus/package-scripts/inspec/postinst

@@ -5,7 +5,7 @@
 #
 
 PROGNAME=`basename $0`
-INSTALLER_DIR=/opt/inspec/embedded
+INSTALLER_DIR=/opt/inspec
 CONFIG_DIR=/etc/inspec
 USAGE="usage: $0"