Open manpages from Awesome

rc.lua

--
--
-- efine these functions somewhere in your rc.lua or utils.lua
--
--

function l_split(str, pat)
   local t = {}  -- NOTE: use {n = 0} in Lua-5.0
   local fpat = "(.-)" .. pat
   local last_end = 1
   local s, e, cap = str:find(fpat, 1)
   while s do
      if s ~= 1 or cap ~= "" then
         table.insert(t,cap)
      end
      last_end = e+1
      s, e, cap = str:find(fpat, last_end)
   end
   if last_end <= #str then
      cap = str:sub(last_end)
      table.insert(t, cap)
   end
   return t
end

function split_manpage(str)
   return l_split(str,'[()]+')
end

-- 
--
-- Add the below blocks into your rc.lua
--
--

-- Create the manpage prompt
local manpageprompt_textbox = wibox.widget.textbox()
-- Create a shortcut function
local function run_manpage_prompt()
    awful.prompt.run {
        prompt       = '<b>Manpage: </b>',
        text         = '',
        bg_cursor    = '#ff0000',
        textbox      = awful.screen.focused().mypromptbox.widget,
        exe_callback = function(input)
            if not input or #input == 0 then return end
	    local splut = split_manpage(input)
	    local mansect = splut[2]
	    local manpage = splut[1]
            awful.spawn.with_shell(browser .. ' http://man7.org/linux/man-pages/man' .. mansect .. '/' .. manpage .. '.' .. mansect .. '.html')
        end
    }
end

--
--
-- Finally, define an awful key combination:
--
--

-- manpage prompt
awful.key({ "Control", altkey, modkey }, "m", run_manpage_prompt,
          {description = "run manpage prompt", group = "launcher"}),