Path management for Bash

path.sh

function join {
    local IFS="$1"
    shift
    echo "$*"
}

export CUSTOM_PATHS=(
    "$HOME/Apps/myapp"
    "$HOME/Apps/myapp2/bin"
)
export DEFAULT_PATH="$PATH:`join : ${CUSTOM_PATHS[@]}`"
export PATH="$DEFAULT_PATH"

function reset_path {
    export PATH="$DEFAULT_PATH"
}

function add_path {
    export PATH="$DEFAULT_PATH:$1"
}