#!/bin/bash
set -e

function __addline {
    local filename=$1
    shift
    local line="$@"

    grep "^$line\$" $filename || echo $line >> $filename
}

function _path_low {
    PATH="$1:$PATH"
    test -r ~/.bash_profile && __addline ~/.bash_profile "export PATH='$1'":'"$PATH"'
    __addline ~/.profile "export PATH='$1'":'"$PATH"'
    __addline ~/.zshenv "export PATH='$1'":'"$PATH"'
}

function _path_high {
    PATH="$PATH:$1"
    test -r ~/.bash_profile && __addline ~/.bash_profile 'export PATH="$PATH"':"'$PATH'"
    __addline ~/.profile "export PATH='$1'":'"$PATH"'
    __addline ~/.zshenv "export PATH='$1'":'"$PATH"'
}

function _path {
    _path_low $@
}