declare-option -hidden str-list filetype_modules

define-command -hidden -params 1 filetype-module-load %{
    evaluate-commands %sh{
        ft="$1"
        file="$kak_config/filetypes/$ft.kak"
        [ -f "$file" ] || exit 0
        for loaded in $kak_opt_filetype_modules; do
            [ "$loaded" = "$ft" ] && exit 0
        done
        printf 'set-option -add global filetype_modules %%{%s}\n' "$ft"
        printf 'source %%{%s}\n' "$file"
        printf 'try %%{ filetype-%s }\n' "$ft"
    }
}

hook global WinSetOption filetype=(.+) %{
    filetype-module-load %val{hook_param_capture_1}
}