From 164e68c7d324b2d941057213fed4bc1cf2d60d56 Mon Sep 17 00:00:00 2001
From: wyvie <elijahrum@gmail.com>
Date: Tue, 23 Sep 2014 13:53:53 +0400
Subject: [PATCH] Added description to languages-support.xml

---
 doc/language-support.xml | 48 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/doc/language-support.xml b/doc/language-support.xml
index e7ffa8af1183..79b56c572d69 100644
--- a/doc/language-support.xml
+++ b/doc/language-support.xml
@@ -330,6 +330,54 @@ Runtime) instead of the OpenJRE.</para>
 </section>
 
 
+<section xml:id="ssec-language-lua"><title>Lua</title>
+
+<para>
+  Lua packages are built by the <varname>buildLuaPackage</varname> function.  This function is
+  implemented
+  in <link xlink:href="https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/lua-modules/generic/default.nix">
+  <filename>pkgs/development/lua-modules/generic/default.nix</filename></link>
+  and works similarly to <varname>buildPerlPackage</varname>. (See
+  <xref linkend="ssec-language-perl"/> for details.)
+</para>
+
+<para>
+  Lua packages are defined
+  in <link xlink:href="https://github.com/NixOS/nixpkgs/blob/master/pkgs/top-level/lua-packages.nix"><filename>pkgs/top-level/lua-packages.nix</filename></link>.
+  Most of them are simple. For example:
+
+  <programlisting>
+fileSystem = buildLuaPackage {
+  name = "filesystem-1.6.2";
+  src = fetchurl {
+    url = "https://github.com/keplerproject/luafilesystem/archive/v1_6_2.tar.gz";
+    sha256 = "1n8qdwa20ypbrny99vhkmx8q04zd2jjycdb5196xdhgvqzk10abz";
+  };  
+  meta = {
+    homepage = "https://github.com/keplerproject/luafilesystem";
+    hydraPlatforms = stdenv.lib.platforms.linux;
+    maintainers = with maintainers; [ flosse ];
+  };
+};
+  </programlisting>
+</para>
+
+<para>
+  Though, more complicated package should be placed in a seperate file in 
+  <link
+  xlink:href="https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/lua-modules"><filename>pkgs/development/lua-modules</filename></link>.
+</para>
+<para>
+  Lua packages accept additional parameter <varname>disabled</varname>, which defines
+  the condition of disabling package from luaPackages. For example, if package has
+  <varname>disabled</varname> assigned to <literal>lua.luaversion != "5.1"</literal>,
+  it will not be included in any luaPackages except lua51Packages, making it
+  only be built for lua 5.1.
+</para>
+
+</section>
+
+
 <!--
 <section><title>Haskell</title>