/usr/libexec/path_helper is not

zshenv

# F!@#!$ing Apple calling /usr/libexec/path_helper from the always executed
# /etc/zshenv which has the result of re-ordering the PATH in a way we can't
# control.
#
# See: https://github.com/sorin-ionescu/prezto/issues/381#issuecomment-12745303

# Approach:
# 1: Store our current path, which is messed up by apple.
# 2: Determine the Apple default path.
# 3: Subtract the default path from the screwed up path.
# 4: Append the default path to the results of 3.
#
# Result: Our stuff will be first, and in the correct order, followed by the
# path_helper defaults

if [ -x /usr/libexec/path_helper ]; then
  FP="${PATH}"
  eval "$(PATH='' /usr/libexec/path_helper)"
  DP="${PATH}"
  PATH=$(/usr/bin/ruby -e "fp=%{$FP}.split(%{:}); dp=%{$DP}.split(%{:}); p=fp-dp+dp; puts p.join(%{:});")
fi