-- {{{ Helper functions
function file_exists(name)
    local f = io.open(name, "r")
    if f~=nil then io.close(f) return true else return false end
end

function run_once(cmd)
    findme = cmd
    firstspace = cmd:find(" ")
    if firstspace then
        findme = cmd:sub(0, firstspace-1)
    end
    awful.util.spawn_with_shell("pgrep -u $USER -x " .. findme .. " > /dev/null || (" .. cmd .. ")")
end

function tablelength(T)
    local count = 0
    for _ in pairs(T) do count = count + 1 end
    return count
end

local function set_wallpaper(s)
    -- Wallpaper
    if beautiful.wallpaper then
        local wallpaper = beautiful.wallpaper
        -- If wallpaper is a function, call it with the screen
        if type(wallpaper) == "function" then
            wallpaper = wallpaper(s)
        end
        gears.wallpaper.maximized(wallpaper, s, false)
        --gears.wallpaper.centered(wallpaper, s, true)
    end
end