libretrodocs

#!/usr/bin/env bash

local="${HOME}/.config/retroarch"
repo='https://github.com/libretro/docs'
open='okular'

cd -- "${local}" || exit

if [[ "${1}" == '' ]]; then
    mode="$(printf 'open\nupdate' | fzf)"
else
    mode="${1}"
fi

if [[ "${mode}" == "update" ]]; then
    if [[ -e "${local}/docs" ]]; then
        cd docs || exit
        git pull --depth 1 -- "${repo}"
    else
        git clone --depth 1 -- "${repo}"
    fi
elif [[ "${mode}" == "open" ]]; then
    cd docs || exit

    if [[ "${2}" == '' ]]; then
        category="$(find ./* -mindepth 1 -maxdepth 1 -type d -printf '%P\n' |
            grep -v -E '(image|overrides|stylesheets)' |
            sort |
            fzf --reverse --preview 'ls -- docs/{}')"
    else
        category="${2}"
    fi

    if [[ ! "${category}" == '' ]]; then
        selection="$(find "docs/${category}" -type f -iname '*.md' |
            sed "s+docs/${category}/++" |
            sort |
            fzf --reverse --preview "cat -- docs/${category}/{}")"
        input_file="docs/${category}/${selection}"
        if [[ ! "${selection}" == '' ]]; then
            realpath "${input_file}"
            "${open}" "${input_file}"
        fi
    fi
fi