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{ pkgs, lib, lua }:
let
requiredLuaModules = drvs: with lib; let
modules = filter hasLuaModule drvs;
in unique ([lua] ++ modules ++ concatLists (catAttrs "requiredLuaModules" modules));
# Check whether a derivation provides a lua module.
hasLuaModule = drv: drv ? luaModule;
in
rec {
inherit hasLuaModule requiredLuaModules;
luaPathList = [
"share/lua/${lua.luaversion}/?.lua"
"share/lua/${lua.luaversion}/?/init.lua"
];
luaCPathList = [
"lib/lua/${lua.luaversion}/?.so"
];
/* generate paths without a prefix
*/
luaPathRelStr = lib.concatStringsSep ";" luaPathList;
luaCPathRelStr = lib.concatStringsSep ";" luaCPathList;
/* generate LUA_(C)PATH value for a specific derivation, i.e., with absolute paths
*/
genLuaPathAbsStr = drv: lib.concatMapStringsSep ";" (x: "${drv}/${x}") luaPathList;
genLuaCPathAbsStr = drv: lib.concatMapStringsSep ";" (x: "${drv}/${x}") luaCPathList;
/* Generate a LUA_PATH with absolute paths
*/
# genLuaPathAbs = drv:
# lib.concatStringsSep ";" (map (x: "${drv}/x") luaPathList);
luaAtLeast = lib.versionAtLeast lua.luaversion;
luaOlder = lib.versionOlder lua.luaversion;
isLua51 = (lib.versions.majorMinor lua.version) == "5.1";
isLua52 = (lib.versions.majorMinor lua.version) == "5.2";
isLua53 = lua.luaversion == "5.3";
isLuaJIT = lib.getName lua == "luajit";
/* generates the relative path towards the folder where
seems stable even when using lua_modules_path = ""
Example:
getDataFolder luaPackages.stdlib
=> stdlib-41.2.2-1-rocks/stdlib/41.2.2-1/doc
*/
getDataFolder = drv:
"${drv.pname}-${drv.version}-rocks/${drv.pname}/${drv.version}";
/* Convert derivation to a lua module.
so that luaRequireModules can be run later
*/
toLuaModule = drv:
drv.overrideAttrs( oldAttrs: {
# Use passthru in order to prevent rebuilds when possible.
passthru = (oldAttrs.passthru or {}) // {
luaModule = lua;
requiredLuaModules = requiredLuaModules drv.propagatedBuildInputs;
};
});
}
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