vicious: load widget modules only when needed

There's no more need to edit init files and manually disable widgets.

Signed-off-by: Joerg T. (Mic92) <jthalheim@gmail.com>
Signed-off-by: Adrian C. (anrxc) <anrxc@sysphere.org>

README

@@ -29,9 +29,9 @@ $XDG_CONFIG_HOME (usually ~/.config):
 
   $ mv vicious $XDG_CONFIG_HOME/awesome/
 
-If you want you can disable widgets you will not use, to avoid having
-useless modules sitting in your memory. You can comment out any widget
-type from the "Configure widgets" list in the widgets/init.lua file.
+Vicious will only load modules for widget types you intend to use in
+your awesome configuration, to avoid having useless modules sitting in
+your memory.
 
 Then add the following to the top of your rc.lua:
 

contrib/init.lua

@@ -5,20 +5,13 @@
 --  * (c) 2010, Adrian C. <anrxc@sysphere.org>
 ---------------------------------------------------
 
--- {{{ Configure widgets
-require("vicious.contrib.batacpi")
-require("vicious.contrib.batpmu")
-require("vicious.contrib.batproc")
-require("vicious.contrib.dio")
-require("vicious.contrib.mpc")
-require("vicious.contrib.netcfg")
-require("vicious.contrib.net")
-require("vicious.contrib.ossvol")
-require("vicious.contrib.pop")
-require("vicious.contrib.pulse")
-require("vicious.contrib.rss")
-require("vicious.contrib.sensors")
--- }}}
+-- {{{ Setup environment
+local setmetatable = setmetatable
+local wrequire = require("vicious.helpers").wrequire
 
 -- Vicious: widgets for the awesome window manager
 module("vicious.contrib")
+-- }}}
+
+-- Load modules at runtime as needed
+setmetatable(_M, { __index = wrequire })

helpers.lua

@@ -9,6 +9,8 @@
 
 -- {{{ Grab environment
 local pairs = pairs
+local rawget = rawget
+local require = require
 local tonumber = tonumber
 local io = { open = io.open }
 local setmetatable = setmetatable
@@ -29,6 +31,13 @@ local scroller = {}
 -- }}}
 
 -- {{{ Helper functions
+-- {{{ Loader of vicious modules
+function wrequire(table,  key)
+    local module = rawget(table,  key)
+    return module or require(table._NAME .. "." .. key)
+end
+-- }}}
+
 -- {{{ Expose path as a Lua table
 function pathtotable(dir)
     return setmetatable({ _path = dir },

widgets/init.lua

@@ -5,32 +5,13 @@
 --  * (c) 2010, Adrian C. <anrxc@sysphere.org>
 ---------------------------------------------------
 
--- {{{ Configure widgets
-require("vicious.widgets.cpu")
-require("vicious.widgets.cpuinf")
-require("vicious.widgets.cpufreq")
-require("vicious.widgets.thermal")
-require("vicious.widgets.uptime")
-require("vicious.widgets.bat")
-require("vicious.widgets.mem")
-require("vicious.widgets.os")
-require("vicious.widgets.fs")
-require("vicious.widgets.dio")
-require("vicious.widgets.raid")
-require("vicious.widgets.hddtemp")
-require("vicious.widgets.net")
-require("vicious.widgets.wifi")
-require("vicious.widgets.mbox")
-require("vicious.widgets.mboxc")
-require("vicious.widgets.mdir")
-require("vicious.widgets.gmail")
-require("vicious.widgets.org")
-require("vicious.widgets.pkg")
-require("vicious.widgets.mpd")
-require("vicious.widgets.volume")
-require("vicious.widgets.weather")
-require("vicious.widgets.date")
--- }}}
+-- {{{ Setup environment
+local setmetatable = setmetatable
+local wrequire = require("vicious.helpers").wrequire
 
 -- Vicious: widgets for the awesome window manager
 module("vicious.widgets")
+-- }}}
+
+-- Load modules at runtime as needed
+setmetatable(_M, { __index = wrequire })