Update env-setup script to make it work better

hacking/env-setup

-# -*- mode: shell-script -*-
-PREFIX_PYTHONPATH="`pwd`/lib"
-PREFIX_PATH="`pwd`/bin"
-PREFIX_MANPATH="`pwd`/docs/man"
-PREFIX_ANS_LIBRARY="`pwd`/library"
+#!/bin/bash
+# usage: source ./hacking/env-setup
+#    modifies environment for running Ansible from checkout
 
-echo "Prefixing PYTHONPATH with $PREFIX_PYTHONPATH"
-export PYTHONPATH=$PREFIX_PYTHONPATH:$PYTHONPATH
+PREFIX_PYTHONPATH="$PWD/lib"
+PREFIX_PATH="$PWD/bin"
 
-echo "Prefixing PATH with $PREFIX_PATH"
+export PYTHONPATH=$PREFIX_PYTHONPATH:$PYTHONPATH
 export PATH=$PREFIX_PATH:$PATH
-echo $PATH
+export ANSIBLE_LIBRARY="$PWD/library"
 
-echo "Prefixing MANPATH with $PREFIX_MANPATH"
-export MANPATH=$PREFIX_MANPATH:$MANPATH
+echo "PATH=$PATH"
+echo "PYTHONPATH=$PYTHONPATH"
+echo "ANSIBLE_LIBRARY=$ANSIBLE_LIBRARY"
 
-echo "Setting ANSIBLE_LIBRARY to ${PREFIX_ANS_LIBRARY}"
-export ANSIBLE_LIBRARY=${PREFIX_ANS_LIBRARY}
+echo "reminder: specify your host file with -i"
+echo "done."