131 lines
4.4 KiB
Nix
131 lines
4.4 KiB
Nix
{ pkgs, lib, lua }:
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let
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requiredLuaModules = drvs: with lib; let
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modules = filter hasLuaModule drvs;
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in unique ([lua] ++ modules ++ concatLists (catAttrs "requiredLuaModules" modules));
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# Check whether a derivation provides a lua module.
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hasLuaModule = drv: drv ? luaModule;
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in
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rec {
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inherit hasLuaModule requiredLuaModules;
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luaPathList = [
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"share/lua/${lua.luaversion}/?.lua"
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"share/lua/${lua.luaversion}/?/init.lua"
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];
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luaCPathList = [
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"lib/lua/${lua.luaversion}/?.so"
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];
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/* generate paths without a prefix
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*/
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luaPathRelStr = lib.concatStringsSep ";" luaPathList;
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luaCPathRelStr = lib.concatStringsSep ";" luaCPathList;
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/* generate LUA_(C)PATH value for a specific derivation, i.e., with absolute paths
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*/
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genLuaPathAbsStr = drv: lib.concatMapStringsSep ";" (x: "${drv}/${x}") luaPathList;
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genLuaCPathAbsStr = drv: lib.concatMapStringsSep ";" (x: "${drv}/${x}") luaCPathList;
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/* Generate a LUA_PATH with absolute paths
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*/
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# genLuaPathAbs = drv:
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# lib.concatStringsSep ";" (map (x: "${drv}/x") luaPathList);
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luaAtLeast = lib.versionAtLeast lua.luaversion;
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luaOlder = lib.versionOlder lua.luaversion;
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isLua51 = (lib.versions.majorMinor lua.version) == "5.1";
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isLua52 = (lib.versions.majorMinor lua.version) == "5.2";
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isLua53 = lua.luaversion == "5.3";
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isLuaJIT = lib.getName lua == "luajit";
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/* generates the relative path towards the folder where
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seems stable even when using lua_modules_path = ""
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Example:
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getDataFolder luaPackages.stdlib
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=> stdlib-41.2.2-1-rocks/stdlib/41.2.2-1/doc
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*/
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getDataFolder = drv:
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"${drv.pname}-${drv.version}-rocks/${drv.pname}/${drv.version}";
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/* Convert derivation to a lua module.
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so that luaRequireModules can be run later
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*/
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toLuaModule = drv:
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drv.overrideAttrs( oldAttrs: {
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# Use passthru in order to prevent rebuilds when possible.
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passthru = (oldAttrs.passthru or {}) // {
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luaModule = lua;
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requiredLuaModules = requiredLuaModules drv.propagatedBuildInputs;
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};
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});
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/* generate luarocks config
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generateLuarocksConfig {
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externalDeps = [ { name = "CRYPTO"; dep = pkgs.openssl; } ];
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rocksSubdir = "subdir";
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};
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*/
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generateLuarocksConfig = {
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externalDeps
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, requiredLuaRocks
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, extraVariables ? {}
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, rocksSubdir
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}: let
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rocksTrees = lib.imap0
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(i: dep: "{ name = [[dep-${toString i}]], root = '${dep}', rocks_dir = '${dep}/${dep.rocksSubdir}' }")
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requiredLuaRocks;
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# Explicitly point luarocks to the relevant locations for multiple-output
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# derivations that are external dependencies, to work around an issue it has
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# (https://github.com/luarocks/luarocks/issues/766)
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depVariables = lib.concatMap ({name, dep}: [
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"${name}_INCDIR='${lib.getDev dep}/include';"
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"${name}_LIBDIR='${lib.getLib dep}/lib';"
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"${name}_BINDIR='${lib.getBin dep}/bin';"
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]) externalDeps';
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# example externalDeps': [ { name = "CRYPTO"; dep = pkgs.openssl; } ]
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externalDeps' = lib.filter (dep: !lib.isDerivation dep) externalDeps;
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externalDepsDirs = map
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(x: "'${builtins.toString x}'")
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(lib.filter (lib.isDerivation) externalDeps);
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extraVariablesStr = lib.concatStringsSep "\n "
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(lib.mapAttrsToList (k: v: "${k}='${v}';") extraVariables);
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in ''
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local_cache = ""
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-- To prevent collisions when creating environments, we install the rock
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-- files into per-package subdirectories
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rocks_subdir = '${rocksSubdir}'
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-- Then we need to tell luarocks where to find the rock files per
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-- dependency
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rocks_trees = {
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${lib.concatStringsSep "\n, " rocksTrees}
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}
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'' + lib.optionalString lua.pkgs.isLuaJIT ''
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-- Luajit provides some additional functionality built-in; this exposes
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-- that to luarock's dependency system
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rocks_provided = {
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jit='${lua.luaversion}-1';
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ffi='${lua.luaversion}-1';
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luaffi='${lua.luaversion}-1';
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bit='${lua.luaversion}-1';
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}
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'' + ''
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-- For single-output external dependencies
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external_deps_dirs = {
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${lib.concatStringsSep "\n, " externalDepsDirs}
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}
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variables = {
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-- Some needed machinery to handle multiple-output external dependencies,
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-- as per https://github.com/luarocks/luarocks/issues/766
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${lib.optionalString (lib.length depVariables > 0) ''
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${lib.concatStringsSep "\n " depVariables}''}
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${extraVariablesStr}
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}
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'';
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}
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