clevis bash completion - experimental

clevis

# bash completion support for clevis.

_clevis() {
    local dir prev cur field
    dir=$(dirname "$(command -v clevis)")
    prev=${COMP_WORDS[COMP_CWORD-1]}
    cur=${COMP_WORDS[COMP_CWORD]}
    field=$((COMP_CWORD + 1))

    if [ "${prev}" = '-d' ]; then
        cur=${cur:=/dev/}
        _filedir
        return
    fi

    if [[ ${COMP_WORDS[COMP_CWORD-1]} == "clevis" ]]; then
        name="clevis-*"
    fi

    if [[ ${COMP_WORDS[COMP_CWORD-2]} == "clevis" ]]; then
        name="clevis-${COMP_WORDS[COMP_CWORD-1]}-*"
    fi

    suggestions=$(find "${dir}" -name "${name}" -executable \
                  | cut -d '-' -f"${field}" | sort | uniq)

    if [[ -n "${cur}" ]]; then
        suggestions=$(for word in "${suggestions[@]}"; do \
                      echo "${word}" | grep -- "${cur}"; done)
    fi

    COMPREPLY=($(compgen -W "${suggestions}" -- "${cur}"))
}

complete -F _clevis clevis
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