FuMenu - minimalists terminal and desktop menu based on fzf, designed primarily for sway

fumenu

#!/usr/bin/env /usr/bin/bash
#
# FuMenu v0.2 (2022)
# Minimalistic fzf-powered terminal menu system
#
# Features:
#   * title
#   * submenus
#   * configurable separators
#   * source for use as function
#   * gui support
#
# Requirements: fzf, bash, [alacritty, sway]
#
# Config search order:
#   1. From command line option: fumenu menu.rc
#   2. '.menurc' and then 'menurc' from current working directory
#   3. $HOME/.config/menurc
#
# Example .menurc:
#
# menu_main=("〜Menu title〜"
#     "+Submenu"     submenu
#     "Menu item 1"  ex_menu_item1
#     "Menu item 2"  ex_menu_item2
#     -
#     "Menu item after separator 3"  ex_menu_item3
#     "Menu item 4"  ex_menu_item4
# )
#
# submenu=("Submenu title"
#     ..  menu_main
#     "Submenu item 1"  ex_submenu_item1
#     "Submenu item N"  ex_submenu_itemN
# )
#
# ex_menu_item1() {
#     action_for_item1.sh
#     sleep 2
#     exit 0
# }
#

#### ~config~ ####
separator="        "
# 1st symbol to mark submenu
submark="+"
subsym="𝅌"
#subsym=" 🢒"
backmark=".."
standalone=yes

#### ~guts~ ####
(return 0 2>/dev/null) && sourced=1

if [[ "$1" == "-h" ]]
then
    echo -e "FuMenu v0.2 (2022)"
    echo -e "Minimalistic fzf-powered terminal menu system\n"
    echo -e "* Put alacritty.yml in the same dir as .menurc for terminal settings."
    echo -e "* File can be sourced without execution to access fuctions only.\n"
    echo -e "Usage: fumenu [-t] config.menurc"
    echo -e "  -h        This help"
    echo -e "  -t        Run in GUI terminal"
    exit 0
elif [[ "$1" == "-t" ]]
then
    menurc="$2"
    terminal="alacritty"
    termconfig="$(dirname $2)/alacritty.yml" 

    [[ -r "$termconfig" ]] && terminal+=" --config-file=$termconfig"

    if [[ "$standalone" ]]
    then
        if pidof sway >/dev/null
        then
            swaymsg -t get_tree | grep -q '"name": "QuickLaunch Menu",' && beep && exit 0
        else
            ps -o args -C alacritty | grep -q "^$terminal .\+/fumenu .\+" && beep && exit 0
        fi
    fi

    $terminal -e $0 $menurc 2>/dev/null &
    exit 0
elif [[ -n "$1" ]]
then
    menurc="$1"
fi

[[ -z "$sourced" ]] && {
    declare -a rcpath
    [[ -n "$menurc" ]] && rcpath+=("$menurc")

    rcpath+=("./.menurc")
    rcpath+=("./menurc")
    rcpath+=("$HOME/.config/menurc")

    for rc in "${rcpath[@]}"
    do
        [[ -r "$rc" ]] && {
            source "$rc"
            break
        }
    done

    unset rcpath
}

fuzzy() {
    local title=$1
    shift
    fzf -i -e +m +s --layout=reverse --info=hidden --padding 0,0,0,2 --cycle \
        --bind home:page-up --bind end:page-down --border=rounded \
        --header="$title" --header-lines=1 --prompt='' --pointer=' ' \
        --color='gutter:#222222,pointer:#000000,header:#7777ff,border:#202020' \
        --color='bg+:#7777ff,fg+:#000000,fg:#aaaaaa' $@
}

exec_menu() {
    local menu_title=""
    local -n menu_items=$1
    local -a menu_names
    local -A menu_actions

    local key=
    local submenu=

    for i in "${menu_items[@]}"
    do
        if [[ -z "$menu_title" ]]
        then
            menu_title="$i"
        elif [[ -z "$key" ]]
        then
            if [[ "$i" == "-" ]]
            then
                menu_names+=("$separator")
                [[ -z "${menu_actions[$separator]}" ]] && menu_actions["$separator"]=":"
            else
                if [[ "${i:0:1}" == "$submark" ]]
                then
                    submenu=true
                    key="${i:1}$subsym"
                elif [[ "$i" == "$backmark" ]]
                then
                    submenu=true
                    key="$i      "
                else
                    key="$i"
                fi
                menu_names+=("$key")
            fi
        else
            if [[ -n "$submenu" ]]
            then
                menu_actions["$key"]="exec_menu $i"
                submenu=
            else
                if [[ "${i:((${#i} - 1)):1}" == "&" ]]
                then
                    menu_actions["$key"]="setsid -f ${i:0:((${#i} - 1))}"
                else
                    menu_actions["$key"]="$i"
                fi
            fi
            key=
        fi
    done

    clear
    # First echo for empty line between the header and items (--header-lines=1)
    local selected=$(
        (echo -e
        for i in "${menu_names[@]}"
            do echo -e "$i"
        done) | fuzzy "$menu_title"
    )

    [[ -n "$selected" ]] && eval "${menu_actions[$selected]}"
}

[[ -z "$sourced" ]] && exec_menu menu_main || export exec_menu