Awesome DM widget

Place this script inside ~/.config/awesome/vicious/widgets directory.

cmus.lua

---------------------------------------------------
-- Licensed under the GNU General Public License v2
-- Based on mpd vidget for vicions by Adrian C. <anrxc@sysphere.org>
---------------------------------------------------
 
-- {{{ Grab environment
local tonumber = tonumber
local io = { popen = io.popen }
local setmetatable = setmetatable
local string = { gmatch = string.gmatch }
local helpers = require("vicious.helpers")
-- }}}
 
 
-- Provides information from cmus, a small, fast and powerful console music player for Unix-like operating systems
module("vicious.widgets.cmus")
 
 
-- {{{ cmus widget type
local function worker(format, warg)
    local cmus_state  = {
        ["{status}"] = "N/A",
        ["{artist}"] = "N/A",
        ["{title}"]  = "N/A",
        ["{album}"]  = "N/A",
        ["{genre}"]  = "N/A",
    }
 
 
    -- Get data from cmus 
    local f = io.popen("cmus-remote -Q")
 
    for line in f:lines() do
        for k, v in string.gmatch(line, "([%w]+)[%s]([%w]+)$") do
            if     k == "status" then cmus_state["{"..k.."}"] = helpers.capitalize(v)
            end
        end
        for k, v in string.gmatch(line, "tag[%s]([%w]+)[%s](.*)$") do
            if     k == "artist" then cmus_state["{"..k.."}"] = helpers.escape(v)
            elseif k == "status" then cmus_state["{"..k.."}"] = helpers.escape(v)
            elseif k == "title"  then cmus_state["{"..k.."}"] = helpers.escape(v)
            elseif k == "album"  then cmus_state["{"..k.."}"] = helpers.escape(v)
            elseif k == "genre"  then cmus_state["{"..k.."}"] = helpers.escape(v)
            end
        end
    end
    f:close()
 
    return cmus_state
end
-- }}}
 
setmetatable(_M, { __call = function(_, ...) return worker(...) end })

Then you need to include cmus_widget call to main awesome cofig file (rc.lua) like this:

rc.lua (awesome 3.4)

-- {{{ Cmus info
musicicon = widget({ type = "imagebox" })
musicicon.image = image(beautiful.widget_music)
-- Initialize widget
cmus_widget = widget({ type = "textbox" })
-- Register widget
vicious.register(cmus_widget, vicious.widgets.cmus,
    function (widget, args)
        if args["{status}"] == "Stopped" then 
            return " - "
        else 
            return args["{status}"]..': '.. args["{artist}"]..' - '.. args["{title}"]..'  ###  '.. args["{genre}"]
        end
    end, 7)
--}}}

rc.lua (awesome 3.5)

-- {{{ Cmus info
musicicon = wibox.widget.imagebox()
musicicon:set_image(beautiful.widget_music)
-- Initialize widget
cmus_widget = wibox.widget.textbox()
-- Register widget
vicious.register(cmus_widget, vicious.widgets.cmus,
    function (widget, args)
        if args["{status}"] == "Stopped" then
            return " - "
        else
            return args["{status}"]..': '.. args["{artist}"]..' - '.. args["{title}"]..'  ###  '.. args["{genre}"]
        end
    end, 7)
--}}}

Then look for mywibox defined somewhere in rc.lua and add cmus_widget

    -- Add widgets to the wibox - order matters
    mywibox[s].widgets = {
        {
            mylauncher,
            mytaglist[s],
            mypromptbox[s],
            layout = awful.widget.layout.horizontal.leftright
        },
        mylayoutbox[s],
        mytextclock,
        -- Add the cmus_widget to the wibox
        cmus_widget,
        -- --------------------------------
        s == 1 and mysystray or nil,
        mytasklist[s],
        layout = awful.widget.layout.horizontal.rightleft
    }

Or for awesome 3.5:

    -- Widgets that are aligned to the right
    local right_layout = wibox.layout.fixed.horizontal()
    if s == 1 then right_layout:add(wibox.widget.systray()) end
    right_layout:add(cmus_widget)
    right_layout:add(mytextclock)
    right_layout:add(mylayoutbox[s])