kakoune/share/kak/kakrc

def -params 1 -docstring "colorscheme <name>: enable named colorscheme" \
  -shell-candidates %{
      for col in ${kak_runtime}/colors/*.kak ${kak_config}/colors/*.kak; do
          candidate=$(basename "${col}" .kak)
          case ${candidate} in
             \**) ;;
             *) echo ${candidate} ;;
          esac
      done
  } \
  colorscheme %{ %sh{
    if [ $# -eq 1 ]; then
        if [ -f "${kak_config}/colors/$1.kak" ];then
            echo "source '${kak_config}/colors/$1.kak'"
        else
            echo "source '${kak_runtime}/colors/$1.kak'"
        fi
    else
        echo "echo -color Error 'Usage: colorscheme <scheme name>'"
    fi
}}

%sh{
    autoload_directory() {
        find -L "$1" -type f -name '*\.kak' \
            -exec printf 'try %%{ source "%s" } catch %%{ echo -debug Autoload: could not load "%s" }\n' '{}' '{}' \;
    }

    echo "colorscheme default"

    if [ -d "${kak_config}/autoload" ]; then
        autoload_directory ${kak_config}/autoload
    elif [ -d "${kak_runtime}/autoload" ]; then
        autoload_directory ${kak_runtime}/autoload
    fi

    if [ -f "${kak_runtime}/kakrc.local" ]; then
        echo "source '${kak_runtime}/kakrc.local'"
    fi

    if [ -f "${kak_config}/kakrc" ]; then
        echo "source '${kak_config}/kakrc'"
    fi
}