#!/bin/bash
set -e

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

    grep "^$line\$" $filename >/dev/null || echo $line >> $filename
}

function _profile {
    [ -w ~/.bash_profile ] && __addline ~/.bash_profile $@
    __addline ~/.profile "$@"
    __addline ~/.zshenv "$@"
}

function _path_low {
    PATH="$1:$PATH"
    _profile "export PATH='$1'":'"$PATH"'
}

function _path_high {
    PATH="$PATH:$1"
    _profile 'export PATH="$PATH"':"'$1'"
}

function _path {
    _path_low $@
}