Advanced finder plugin for awesome NNN file manager (command selection and history)

finder

#!/usr/bin/env bash
#
# Description: Advanced file finder plugin for awesome NNN file manager
#
# Features:
#  - Predefined commands selection menu
#  - History of unique commands
#
# Requires: bash, fzf, [fd]
#
# Bugs: Filenames with spaces brakes grep. Please report if you find some more.
#
# Author: nick133

history_file="$HOME/.config/nnn/history/find_commands.hst"
history_maxlines=12

find_commands=(
    '' '* Hint: Press Escape to cancel' ''
    '[ History ]'
    'grep -lZ "???" `fd --type f -HL ".*$"`'
    'grep -lZF "main()" `fd -t f -HLg "*.c"`'
    'fd -HL0g "*.*"'
    'fd -HL0 --size +1M ".*$"'
    'fd -HL0 --max-depth 1 ".*$"'
    'fd -HL0 --change-newer-than "2021-01-12 10:00:00" ".*$"'
    'fd -HL0 --change-older-than "2021-01-12 10:00:00" ".*$"'
)

fuzzy() {
    title=$1
    shift

    if [[ -n "$1" ]]
    then
        lines=$1
        shift
    else
        lines=3
    fi

    fzf -i -e --layout=reverse --info=hidden \
        --bind home:page-up --bind end:page-down \
        --header="$title" --header-lines=$lines --prompt='' --pointer='>>' $@
}

select_command=$(for cmd in "${find_commands[@]}"
    do printf "$cmd\n"
done | fuzzy "    <<<  Find files / Regex search  >>>")

mkdir -p "$(dirname $history_file)"

[[ -z "$select_command" ]] && exit 1

if [[ "$select_command" == "[ History ]" ]]
then
    select_command="$(sort -r $history_file | fuzzy [\ History\ ] 0)"
    [[ -z "$select_command" ]] && exit 1
fi

clear && echo
read -p "==> Edit command: " -re -i "$select_command" cmd
if [[ -n "$cmd" ]]
then
    hist_lines=$(wc -l $history_file | awk '{ print $1 }')

    if [[ "$hist_lines" -eq $history_maxlines ]]
    then
        tail -n $(($history_maxlines - 1)) $history_file > $history_file.new
        mv -f $history_file.new $history_file
    fi

    echo $cmd >> $history_file
    uniq $history_file > $history_file.new
    mv -f $history_file.new $history_file

    printf "%s" "+l" > "$NNN_PIPE"
    eval "$cmd" > "$NNN_PIPE"
fi