nixos – 如何为lua设置nix-shell脚本？

我正在尝试设置一个包含lua 5.2,lua套接字库和一些其他库的nix- shell脚本.但是,当我加载 shell时,只有Lua最终存在.

with import <nixpkgs> {};
stdenv.mkDerivation rec {
  name = "lua-env";
  buildInputs = [ lua52Packages.lua lua52Packages.luasocket lua52Packages.luasec lua52Packages.cjson ];
}

当我运行shell时,这就是我得到的：

savanni@lapis:~  $nix-shell lua.nix 

[nix-shell:~]$lua
Lua 5.2.3  Copyright (C) 1994-2013 Lua.org, PUC-Rio
> require 'socket'
stdin:1: module 'socket' not found:
    no field package.preload['socket']
    no file '/usr/share/lua/5.2/socket.lua'
    no file '/usr/share/lua/5.2/socket/init.lua'
    no file '/usr/lib/lua/5.2/socket.lua'
    no file '/usr/lib/lua/5.2/socket/init.lua'
    no file './socket.lua'
    no file '/usr/lib/lua/5.2/socket.so'
    no file '/usr/lib/lua/5.2/loadall.so'
    no file './socket.so'
stack traceback:
    [C]: in function 'require'
    stdin:1: in main chunk
    [C]: in ?
> 

[nix-shell:~]$exit
savanni@lapis:~  $

您必须设置LUA_PATH和LUA_CPATH

这个shell.nix应该可以工作,

with import <nixpkgs> {};
with luaPackages;

let
  libs = [lua cjson luasocket luasec];
in
stdenv.mkDerivation rec {
  name = "lua-env";
  buildInputs = libs;

  shellHook = ''
    export LUA_CPATH="${lib.concatStringsSep ";" (map getLuaCPath libs)}"
    export LUA_PATH="${lib.concatStringsSep ";" (map getLuaPath libs)}"
  '';
}

要检查这些路径是否已导出,

$nix-shell --run 'echo $LUA_CPATH; echo $LUA_PATH'
/nix/store/lp0ns0hjwx1klk6amnyic3f62bw7h8j7-lua-5.2.3/lib/lua/5.2/?.so;/nix/store/lp0ns0hjwx1klk6amnyic3f62bw7h8j7-lua-5.2.3/share/lua/5.2/?.so;/nix/store/ppdspfcm5nnfz0fk9zarjmpyv5lcmn18-lua5.2-cjson-2.1.0/lib/lua/5.2/?.so;/nix/store/ppdspfcm5nnfz0fk9zarjmpyv5lcmn18-lua5.2-cjson-2.1.0/share/lua/5.2/?.so;/nix/store/b71xyq7gkc8iccj6wr84zq31gqc3m9ix-lua5.2-socket-3.0-rc1/lib/lua/5.2/?.so;/nix/store/b71xyq7gkc8iccj6wr84zq31gqc3m9ix-lua5.2-socket-3.0-rc1/share/lua/5.2/?.so;/nix/store/6q8xn2bcfskmrfzql47jld5d2irvn5jr-lua5.2-sec-0.6/lib/lua/5.2/?.so;/nix/store/6q8xn2bcfskmrfzql47jld5d2irvn5jr-lua5.2-sec-0.6/share/lua/5.2/?.so
/nix/store/lp0ns0hjwx1klk6amnyic3f62bw7h8j7-lua-5.2.3/lib/lua/5.2/?.lua;/nix/store/lp0ns0hjwx1klk6amnyic3f62bw7h8j7-lua-5.2.3/share/lua/5.2/?.lua;/nix/store/ppdspfcm5nnfz0fk9zarjmpyv5lcmn18-lua5.2-cjson-2.1.0/lib/lua/5.2/?.lua;/nix/store/ppdspfcm5nnfz0fk9zarjmpyv5lcmn18-lua5.2-cjson-2.1.0/share/lua/5.2/?.lua;/nix/store/b71xyq7gkc8iccj6wr84zq31gqc3m9ix-lua5.2-socket-3.0-rc1/lib/lua/5.2/?.lua;/nix/store/b71xyq7gkc8iccj6wr84zq31gqc3m9ix-lua5.2-socket-3.0-rc1/share/lua/5.2/?.lua;/nix/store/6q8xn2bcfskmrfzql47jld5d2irvn5jr-lua5.2-sec-0.6/lib/lua/5.2/?.lua;/nix/store/6q8xn2bcfskmrfzql47jld5d2irvn5jr-lua5.2-sec-0.6/share/lua/5.2/?.lua