Minimal rc.lua with randow wallpaper and key binding

rc.lua

local gears = require("gears")
local awful = require("awful")
require("awful.autofocus")
local beautiful = require("beautiful")
local menubar = require("menubar")

beautiful.init(gears.filesystem.get_themes_dir() .. "gtk/theme.lua")

local terminal = "xterm"
local modkey = "Mod4"

menubar.utils.terminal = terminal

awful.layout.layouts = {
    awful.layout.suit.floating,
}

awful.screen.connect_for_each_screen(function(s)
    awful.tag({ "uno" }, s, awful.layout.layouts[1])
end)

local walldir = "/usr/share/backgrounds/archlinux"
local interval = 600

local wallpaper_timer = gears.timer {
    timeout = interval,
    autostart = true
}

wallpaper_timer:connect_signal("timeout", function()
    local files = {}
    local cmd = 'find ' .. walldir .. ' -type f'
    awful.spawn.with_line_callback (cmd, {
        stdout = function(line)
            table.insert(files, line)
        end,
        output_done = function()
            local index = math.random(1, #files)
            local image = files[index]
            for s = 1, screen.count() do
                gears.wallpaper.maximized(image, s, true)
            end
        end,
    })
end)

if wallpaper_timer.started then
    wallpaper_timer:emit_signal('timeout')
end

local globalkeys = gears.table.join(
    awful.key({ modkey,           }, "Return", function () awful.spawn(terminal) end,
              {description = "open a terminal", group = "launcher"}),
    awful.key({ modkey, "Control" }, "r", awesome.restart,
              {description = "reload awesome", group = "awesome"}),
    awful.key({ modkey, "Shift"   }, "q", awesome.quit,
              {description = "quit awesome", group = "awesome"}),
    awful.key({ modkey,           }, "w", function() wallpaper_timer:emit_signal('timeout') end,
              {description = "quit awesome", group = "awesome"}),
    awful.key({ modkey }, "p", function() menubar.show() end,
              {description = "show the menubar", group = "launcher"})
)

local clientbuttons = gears.table.join(
    awful.button({ }, 1, function (c)
        c:emit_signal("request::activate", "mouse_click", {raise = true})
    end),
    awful.button({ modkey }, 1, function (c)
        c:emit_signal("request::activate", "mouse_click", {raise = true})
        awful.mouse.client.move(c)
    end),
    awful.button({ modkey }, 3, function (c)
        c:emit_signal("request::activate", "mouse_click", {raise = true})
        awful.mouse.client.resize(c)
    end)
)

root.keys(globalkeys)

awful.rules.rules = {
    {
        rule = { },
        properties = {
            border_width = beautiful.border_width,
            border_color = beautiful.border_normal,
            focus = awful.client.focus.filter,
            raise = true,
            buttons = clientbuttons,
            screen = awful.screen.preferred,
            placement = awful.placement.no_overlap+awful.placement.no_offscreen
        }
    }
}

client.connect_signal("mouse::enter", function(c)
    c:emit_signal("request::activate", "mouse_enter", {raise = false})
end)

client.connect_signal("focus", function(c) c.border_color = beautiful.border_focus end)
client.connect_signal("unfocus", function(c) c.border_color = beautiful.border_normal end)