nixpkgs/pkgs/development/interpreters/lua-5/interpreter.nix

{ lib, stdenv, fetchurl, readline
, compat ? false
, callPackage
, makeWrapper
, self
, packageOverrides ? (final: prev: {})
, pkgsBuildBuild
, pkgsBuildHost
, pkgsBuildTarget
, pkgsHostHost
, pkgsTargetTarget
, version
, hash
, passthruFun
, patches ? []
, postConfigure ? null
, postBuild ? null
, staticOnly ? stdenv.hostPlatform.isStatic
, luaAttr ? "lua${lib.versions.major version}_${lib.versions.minor version}"
} @ inputs:
let
  luaPackages = self.pkgs;

  luaversion = lib.versions.majorMinor version;

plat = if (stdenv.isLinux && lib.versionOlder self.luaversion "5.4") then "linux"
       else if (stdenv.isLinux && lib.versionAtLeast self.luaversion "5.4") then "linux-readline"
       else if stdenv.isDarwin then "macosx"
       else if stdenv.hostPlatform.isMinGW then "mingw"
       else if stdenv.isFreeBSD then "freebsd"
       else if stdenv.isSunOS then "solaris"
       else if stdenv.hostPlatform.isBSD then "bsd"
       else if stdenv.hostPlatform.isUnix then "posix"
       else "generic";

compatFlags = if (lib.versionOlder self.luaversion "5.3") then " -DLUA_COMPAT_ALL"
              else if (lib.versionOlder self.luaversion "5.4") then " -DLUA_COMPAT_5_1 -DLUA_COMPAT_5_2"
              else " -DLUA_COMPAT_5_3";
in

stdenv.mkDerivation rec {
  pname = "lua";
  inherit version;

  src = fetchurl {
    url = "https://www.lua.org/ftp/${pname}-${version}.tar.gz";
    sha256 = hash;
  };

  LuaPathSearchPaths    = luaPackages.luaLib.luaPathList;
  LuaCPathSearchPaths   = luaPackages.luaLib.luaCPathList;
  setupHook = luaPackages.lua-setup-hook LuaPathSearchPaths LuaCPathSearchPaths;

  nativeBuildInputs = [ makeWrapper ];
  buildInputs = [ readline ];

  inherit patches;

  # we can't pass flags to the lua makefile because for portability, everything is hardcoded
  postPatch = ''
    {
      echo -e '
        #undef  LUA_PATH_DEFAULT
        #define LUA_PATH_DEFAULT "./share/lua/${luaversion}/?.lua;./?.lua;./?/init.lua"
        #undef  LUA_CPATH_DEFAULT
        #define LUA_CPATH_DEFAULT "./lib/lua/${luaversion}/?.so;./?.so;./lib/lua/${luaversion}/loadall.so"
      '
    } >> src/luaconf.h
  '' + lib.optionalString (!stdenv.isDarwin && !staticOnly) ''
    # Add a target for a shared library to the Makefile.
    sed -e '1s/^/LUA_SO = liblua.so/' \
        -e 's/ALL_T *= */&$(LUA_SO) /' \
        -i src/Makefile
    cat ${./lua-dso.make} >> src/Makefile
  '' ;

  # see configurePhase for additional flags (with space)
  makeFlags = [
    "INSTALL_TOP=${placeholder "out"}"
    "INSTALL_MAN=${placeholder "out"}/share/man/man1"
    "R=${version}"
    "LDFLAGS=-fPIC"
    "V=${luaversion}"
    "PLAT=${plat}"
    "CC=${stdenv.cc.targetPrefix}cc"
    "RANLIB=${stdenv.cc.targetPrefix}ranlib"
    # Lua links with readline wich depends on ncurses. For some reason when
    # building pkgsStatic.lua it fails because symbols from ncurses are not
    # found. Adding ncurses here fixes the problem.
    "MYLIBS=-lncurses"
  ];

  configurePhase = ''
    runHook preConfigure

    makeFlagsArray+=(CFLAGS='-O2 -fPIC${lib.optionalString compat compatFlags} $(${
      if lib.versionAtLeast luaversion "5.2" then "SYSCFLAGS" else "MYCFLAGS"})' )
    makeFlagsArray+=(${lib.optionalString stdenv.isDarwin "CC=\"$CC\""}${lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) " 'AR=${stdenv.cc.targetPrefix}ar rcu'"})

    installFlagsArray=( TO_BIN="lua luac" INSTALL_DATA='cp -d' \
      TO_LIB="${if stdenv.isDarwin then "liblua.${version}.dylib"
                else ("liblua.a" + lib.optionalString (!staticOnly) " liblua.so liblua.so.${luaversion} liblua.so.${version}" )}" )

    runHook postConfigure
  '';
  inherit postConfigure;

  inherit postBuild;

  postInstall = ''
    mkdir -p "$out/share/doc/lua" "$out/lib/pkgconfig"
    mv "doc/"*.{gif,png,css,html} "$out/share/doc/lua/"
    rmdir $out/{share,lib}/lua/${luaversion} $out/{share,lib}/lua
    mkdir -p "$out/lib/pkgconfig"

    cat >"$out/lib/pkgconfig/lua.pc" <<EOF
    prefix=$out
    libdir=$out/lib
    includedir=$out/include
    INSTALL_BIN=$out/bin
    INSTALL_INC=$out/include
    INSTALL_LIB=$out/lib
    INSTALL_MAN=$out/man/man1

    Name: Lua
    Description: An Extensible Extension Language
    Version: ${version}
    Requires:
    Libs: -L$out/lib -llua
    Cflags: -I$out/include
    EOF
    ln -s "$out/lib/pkgconfig/lua.pc" "$out/lib/pkgconfig/lua-${luaversion}.pc"
    ln -s "$out/lib/pkgconfig/lua.pc" "$out/lib/pkgconfig/lua${luaversion}.pc"
    ln -s "$out/lib/pkgconfig/lua.pc" "$out/lib/pkgconfig/lua${lib.replaceStrings [ "." ] [ "" ] luaversion}.pc"
  '';

  # copied from python
  passthru = let
    # When we override the interpreter we also need to override the spliced versions of the interpreter
    inputs' = lib.filterAttrs (n: v: ! lib.isDerivation v && n != "passthruFun") inputs;
    override = attr: let lua = attr.override (inputs' // { self = lua; }); in lua;
  in passthruFun rec {
    inherit self luaversion packageOverrides luaAttr;
    executable = "lua";
    luaOnBuildForBuild = override pkgsBuildBuild.${luaAttr};
    luaOnBuildForHost = override pkgsBuildHost.${luaAttr};
    luaOnBuildForTarget = override pkgsBuildTarget.${luaAttr};
    luaOnHostForHost = override pkgsHostHost.${luaAttr};
    luaOnTargetForTarget = lib.optionalAttrs (lib.hasAttr luaAttr pkgsTargetTarget) (override pkgsTargetTarget.${luaAttr});
  };

  meta = {
    homepage = "https://www.lua.org";
    description = "Powerful, fast, lightweight, embeddable scripting language";
    longDescription = ''
      Lua combines simple procedural syntax with powerful data
      description constructs based on associative arrays and extensible
      semantics. Lua is dynamically typed, runs by interpreting bytecode
      for a register-based virtual machine, and has automatic memory
      management with incremental garbage collection, making it ideal
      for configuration, scripting, and rapid prototyping.
    '';
    license = lib.licenses.mit;
    platforms = lib.platforms.unix;
  };
}