Auto-generate bash functions for selecting kerl-installed Erlang versions. Functions are named based on the kerl-installed versions; for example, if you have R16B03 installed as r16b03, your shell will have a function named r16b03 for selecting that version. If you install a new version, run kerl_gen in your shell to regenerate the version selec…

.bashrc-kerl

export MYKERLVSN=''

no_kerl()
{
    kerl_deactivate
    unset _KERL_SAVED_AGNER_BIN _KERL_SAVED_AGNER_EXACT_PREFIX _KERL_SAVED_REBAR_PLT_DIR AGNER_BIN AGNER_EXACT_PREFIX
    MYKERLVSN=''
}

kerl_gen()
{
    for k in `ls /usr/local/var/kerl`; do
        k2=${k/-/_}
        eval $(echo "$k2() { . /usr/local/var/kerl/$k/activate; MYKERLVSN=$k; }")
    done
}
kerl_gen

which_kerl()
{
    [[ -n $MYKERLVSN ]] && printf ' (%s)' $MYKERLVSN
}

You can call which_gen in your bash prompt to have it display which kerl version is currently selected:

export PS1='$(which_kerl)\$ '