nnn/misc/auto-completion/bash/nnn-completion.bash

#
# Rudimentary Bash completion definition for nnn.
#
# Author:
#   Arun Prakash Jana <engineerarun@gmail.com>
#

_nnn () {
    COMPREPLY=()
    local IFS=$' \n'
    local cur=$2 prev=$3
    local -a opts opts_with_args
    opts=(
        -b
        -d
        -e
        -h
        -i
        -l
        -p
        -s
        -S
        -v
        -w
    )
    opts_with_arg=(
        -b
        -p
    )

    # Do not complete non option names
    [[ $cur == -* ]] || return 1

    # Do not complete when the previous arg is an option expecting an argument
    for opt in "${opts_with_arg[@]}"; do
        [[ $opt == $prev ]] && return 1
    done

    # Complete option names
    COMPREPLY=( $(compgen -W "${opts[*]}" -- "$cur") )
    return 0
}

complete -F _nnn nnn