function fish_enable_module
    set -l module $argv[1]
    set -l dir $__fish_sysconf_dir/modules/$module

    test -d $dir
    or return 1

    if test -d $dir/functions
        set -ga fish_function_path $dir/functions
    end

    if test -d $dir/completions
        set -ga fish_complete_path $dir/completions
    end

    if test -d $dir/conf.d
        for file in (path sort $dir/conf.d/*.fish)
            source $file
        end
    end
end