Some lua and awesome improvements

- Move lgi to luaPackages
- Use luaPackages in awesome and passthru lua
- Allow to pass lua modules to the awesome WM so that those can be used in the configuration

nixos/modules/services/x11/window-managers/awesome.nix

···
 let
 
   cfg = config.services.xserver.windowManager.awesome;
+  awesome = cfg.package;
 
 in
 
···
 
   options = {
 
-    services.xserver.windowManager.awesome.enable = mkOption {
-      default = false;
-      description = "Enable the Awesome window manager.";
+    services.xserver.windowManager.awesome = {
+
+      enable = mkEnableOption "Awesome window manager";
+
+      luaModules = mkOption {
+        default = [];
+        type = types.listOf types.package;
+        description = "List of lua packages available for being used in the Awesome configuration.";
+        example = literalExample "[ luaPackages.oocairo ]";
+      };
+
+      package = mkOption {
+        default = null;
+        type = types.nullOr types.package;
+        description = "Package to use for running the Awesome WM.";
+        apply = pkg: if pkg == null then pkgs.awesome else pkg;
+      };
+
     };
 
   };
···
       { name = "awesome";
         start =
           ''
-            ${pkgs.awesome}/bin/awesome &
+            ${concatMapStrings (pkg: ''
+              export LUA_CPATH=$LUA_CPATH''${LUA_CPATH:+;}${pkg}/lib/lua/${awesome.lua.luaversion}/?.so
+              export LUA_PATH=$LUA_PATH''${LUA_PATH:+;}${pkg}/lib/lua/${awesome.lua.luaversion}/?.lua
+            '') cfg.luaModules}
+
+            ${awesome}/bin/awesome &
             waitPID=$!
           '';
       };
 
-    environment.systemPackages = [ pkgs.awesome ];
+    environment.systemPackages = [ awesome ];
 
   };
 

pkgs/applications/window-managers/awesome/3.4.nix

···
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; linux;
   };
+
+  passthru = {
+    inherit lua;
+  };
+
 }

pkgs/applications/window-managers/awesome/default.nix

···
-{ stdenv, fetchurl, lua, cairo, cmake, imagemagick, pkgconfig, gdk_pixbuf
+{ stdenv, fetchurl, luaPackages, cairo, cmake, imagemagick, pkgconfig, gdk_pixbuf
 , xlibs, libstartup_notification, libxdg_basedir, libpthreadstubs
-, xcb-util-cursor, lgi, makeWrapper, pango, gobjectIntrospection, unclutter
+, xcb-util-cursor, makeWrapper, pango, gobjectIntrospection, unclutter
 , compton, procps, iproute, coreutils, curl, alsaUtils, findutils, rxvt_unicode
 , which, dbus, nettools, git, asciidoc, doxygen, xmlto, docbook_xml_dtd_45
 , docbook_xsl }:
 
 let
   version = "3.5.5";
-in
+in with luaPackages;
 
 stdenv.mkDerivation rec {
   name = "awesome-${version}";
···
     dbus
     doxygen
     gdk_pixbuf
+    gobjectIntrospection
     git
     imagemagick
     lgi
···
 
   LD_LIBRARY_PATH = "${cairo}/lib:${pango}/lib:${gobjectIntrospection}/lib";
   GI_TYPELIB_PATH = "${pango}/lib/girepository-1.0";
-  LUA_CPATH = "${lgi}/lib/lua/5.1/?.so";
-  LUA_PATH  = "${lgi}/share/lua/5.1/?.lua;${lgi}/share/lua/5.1/lgi/?.lua";
+  LUA_CPATH = "${lgi}/lib/lua/${lua.luaversion}/?.so";
+  LUA_PATH  = "${lgi}/share/lua/${lua.luaversion}/?.lua;${lgi}/share/lua/${lua.luaversion}/lgi/?.lua";
 
   postInstall = ''
     wrapProgram $out/bin/awesome \
-      --set LUA_CPATH '"${lgi}/lib/lua/5.1/?.so"' \
-      --set LUA_PATH '"${lgi}/share/lua/5.1/?.lua;${lgi}/share/lua/5.1/lgi/?.lua"' \
-      --set GI_TYPELIB_PATH "${pango}/lib/girepository-1.0" \
+      --prefix LUA_CPATH ";" '"${lgi}/lib/lua/${lua.luaversion}/?.so"' \
+      --prefix LUA_PATH ";" '"${lgi}/share/lua/${lua.luaversion}/?.lua;${lgi}/share/lua/${lua.luaversion}/lgi/?.lua"' \
+      --prefix GI_TYPELIB_PATH : "$GI_TYPELIB_PATH" \
       --prefix LD_LIBRARY_PATH : "${cairo}/lib:${pango}/lib:${gobjectIntrospection}/lib" \
       --prefix PATH : "${compton}/bin:${unclutter}/bin:${procps}/bin:${iproute}/sbin:${coreutils}/bin:${curl}/bin:${alsaUtils}/bin:${findutils}/bin:${rxvt_unicode}/bin"
 
     wrapProgram $out/bin/awesome-client \
       --prefix PATH : "${which}/bin"
   '';
+
+  passthru = {
+    inherit lua;
+  };
 }

pkgs/development/libraries/lgi/default.nix

···
-{ stdenv, fetchurl, pkgconfig, gobjectIntrospection, lua, glib }:
-
-stdenv.mkDerivation {
-  name = "lgi-0.7.2";
-
-  src = fetchurl {
-    url    = https://github.com/pavouk/lgi/archive/0.7.2.tar.gz;
-    sha256 = "0ihl7gg77b042vsfh0k7l53b7sl3d7mmrq8ns5lrsf71dzrr19bn";
-  };
-
-  meta = with stdenv.lib; {
-    description = "Gobject-introspection based dynamic Lua binding to GObject based libraries";
-    homepage    = https://github.com/pavouk/lgi;
-    license     = "custom";
-    maintainers = with maintainers; [ lovek323 ];
-    platforms   = platforms.unix;
-  };
-
-  buildInputs = [ glib gobjectIntrospection lua pkgconfig ];
-
-  preBuild = ''
-    sed -i "s|/usr/local|$out|" lgi/Makefile
-  '';
-}

pkgs/top-level/all-packages.nix

···
     libpng = libpng12;
   };
 
-  lgi = callPackage ../development/libraries/lgi { };
-
   lib3ds = callPackage ../development/libraries/lib3ds { };
 
   libaacs = callPackage ../development/libraries/libaacs { };

pkgs/top-level/lua-packages.nix

···
    for each package in a separate file: the call to the function would
    be almost as must code as the function itself. */
 
-{ fetchurl, stdenv, lua, callPackage, unzip, zziplib
-, pcre, oniguruma, gnulib, tre, glibc, sqlite, openssl, expat
+{ fetchurl, stdenv, lua, callPackage, unzip, zziplib, pkgconfig, libtool
+, pcre, oniguruma, gnulib, tre, glibc, sqlite, openssl, expat, cairo
+, perl, gtk, python, glib, gobjectIntrospection
 }:
 
 let
···
   isLua52 = lua.luaversion == "5.2";
   self = _self;
   _self = with self; {
+  inherit lua;
   inherit (stdenv.lib) maintainers;
 
   #define build lua package function
···
       license = stdenv.lib.licenses.mit;
     };
   };
+
+  lgi = stdenv.mkDerivation rec {
+    name = "lgi-${version}";
+    version = "0.7.2";
+
+    src = fetchurl {
+      url    = "https://github.com/pavouk/lgi/archive/${version}.tar.gz";
+      sha256 = "0ihl7gg77b042vsfh0k7l53b7sl3d7mmrq8ns5lrsf71dzrr19bn";
+    };
+
+    meta = with stdenv.lib; {
+      description = "GObject-introspection based dynamic Lua binding to GObject based libraries";
+      homepage    = https://github.com/pavouk/lgi;
+      license     = "custom";
+      maintainers = with maintainers; [ lovek323 ];
+      platforms   = platforms.unix;
+    };
+
+    buildInputs = [ glib gobjectIntrospection lua pkgconfig ];
+
+    makeFlags = [ "LUA_VERSION=${lua.luaversion}" ];
+
+    preBuild = ''
+      sed -i "s|/usr/local|$out|" lgi/Makefile
+    '';
+  };
+
 }; in self