nixpkgs/pkgs/development/interpreters/ruby/default.nix

{ stdenv, lib, fetchurl, fetchFromSavannah, fetchFromGitHub
, zlib, openssl, gdbm, ncurses, readline, groff, libyaml, libffi, autoreconfHook, bison
, autoconf, darwin ? null
} @ args:

let
  op = stdenv.lib.optional;
  ops = stdenv.lib.optionals;
  opString = stdenv.lib.optionalString;
  patchSet = import ./rvm-patchsets.nix { inherit fetchFromGitHub; };
  config = import ./config.nix { inherit fetchFromSavannah; };
  rubygemsSrc = import ./rubygems-src.nix { inherit fetchurl; };
  unpackdir = obj:
    lib.removeSuffix ".tgz"
      (lib.removeSuffix ".tar.gz" obj.name);

  generic = { majorVersion, minorVersion, teenyVersion, patchLevel, sha256 }: let
    versionNoPatch = "${majorVersion}.${minorVersion}.${teenyVersion}";
    version = "${versionNoPatch}-p${patchLevel}";
    fullVersionName = if patchLevel != "0" && stdenv.lib.versionOlder versionNoPatch "2.1"
      then version
      else versionNoPatch;
    tag = "v" + stdenv.lib.replaceChars ["." "p" "-"] ["_" "_" ""] fullVersionName;
    isRuby21 = majorVersion == "2" && minorVersion == "1";
    baseruby = self.override { useRailsExpress = false; };
    self = lib.makeOverridable (
      { stdenv, lib, fetchurl, fetchFromSavannah, fetchFromGitHub
      , useRailsExpress ? true
      , zlib, zlibSupport ? true
      , openssl, opensslSupport ? true
      , gdbm, gdbmSupport ? true
      , ncurses, readline, cursesSupport ? true
      , groff, docSupport ? false
      , libyaml, yamlSupport ? true
      , libffi, fiddleSupport ? true
      , autoreconfHook, bison, autoconf
      , darwin ? null
      }:
      let rubySrc =
        if useRailsExpress then fetchFromGitHub {
          owner  = "ruby";
          repo   = "ruby";
          rev    = tag;
          sha256 = sha256.git;
        } else fetchurl {
          url = "http://cache.ruby-lang.org/pub/ruby/${majorVersion}.${minorVersion}/ruby-${fullVersionName}.tar.gz";
          sha256 = sha256.src;
        };
      in
      stdenv.mkDerivation rec {
        inherit version;

        name = "ruby-${version}";

        srcs = [ rubySrc rubygemsSrc ];
        sourceRoot =
          if useRailsExpress then
            "ruby-${tag}-src"
          else
            unpackdir rubySrc;

        # Have `configure' avoid `/usr/bin/nroff' in non-chroot builds.
        NROFF = "${groff}/bin/nroff";

        buildInputs = ops useRailsExpress [ autoreconfHook bison ]
          ++ (op fiddleSupport libffi)
          ++ (ops cursesSupport [ ncurses readline ])
          ++ (op docSupport groff)
          ++ (op zlibSupport zlib)
          ++ (op opensslSupport openssl)
          ++ (op gdbmSupport gdbm)
          ++ (op yamlSupport libyaml)
          # Looks like ruby fails to build on darwin without readline even if curses
          # support is not enabled, so add readline to the build inputs if curses
          # support is disabled (if it's enabled, we already have it) and we're
          # running on darwin
          ++ (op (!cursesSupport && stdenv.isDarwin) readline)
          ++ (ops stdenv.isDarwin (with darwin; [ libiconv libobjc libunwind ]));

        enableParallelBuilding = true;

        patches =
          [ ./gem_hook.patch ] ++
          (import ./patchsets.nix {
            inherit patchSet useRailsExpress ops patchLevel;
          })."${versionNoPatch}";

        postUnpack = ''
          cp -r ${unpackdir rubygemsSrc} ${sourceRoot}/rubygems
        '' + opString isRuby21 ''
          rm "$sourceRoot/enc/unicode/name2ctype.h"
        '';

        postPatch = if isRuby21 then ''
          rm tool/config_files.rb
          cp ${config}/config.guess tool/
          cp ${config}/config.sub tool/
        ''
        else opString useRailsExpress ''
          sed -i configure.in -e '/config.guess/d'
          cp ${config}/config.guess tool/
          cp ${config}/config.sub tool/
        '';

        configureFlags = ["--enable-shared" "--enable-pthread"]
          ++ op useRailsExpress "--with-baseruby=${baseruby}/bin/ruby"
          ++ ops stdenv.isDarwin [
            # on darwin, we have /usr/include/tk.h -- so the configure script detects
            # that tk is installed
            "--with-out-ext=tk"
            # on yosemite, "generating encdb.h" will hang for a very long time without this flag
            "--with-setjmp-type=setjmp"
          ];

        installFlags = stdenv.lib.optionalString docSupport "install-doc";
        # Bundler tries to create this directory
        postInstall = ''
          # Update rubygems
          pushd rubygems
          $out/bin/ruby setup.rb
          popd

          # Bundler tries to create this directory
          mkdir -pv $out/${passthru.gemPath}
          mkdir -p $out/nix-support
          cat > $out/nix-support/setup-hook <<EOF
          addGemPath() {
            addToSearchPath GEM_PATH \$1/${passthru.gemPath}
          }

          envHooks+=(addGemPath)
          EOF
        '' + opString useRailsExpress ''
          rbConfig=$(find $out/lib/ruby -name rbconfig.rb)

          # Prevent the baseruby from being included in the closure.
          sed -i '/^  CONFIG\["BASERUBY"\]/d' $rbConfig
          sed -i "s|'--with-baseruby=${baseruby}/bin/ruby'||" $rbConfig
        '';

        meta = {
          license = stdenv.lib.licenses.ruby;
          homepage = http://www.ruby-lang.org/en/;
          description = "The Ruby language";
          platforms = stdenv.lib.platforms.all;
        };

        passthru = rec {
          inherit majorVersion minorVersion teenyVersion patchLevel;
          rubyEngine = "ruby";
          baseRuby = baseruby;
          libPath = "lib/${rubyEngine}/${versionNoPatch}";
          gemPath = "lib/${rubyEngine}/gems/${versionNoPatch}";
        };
      }
    ) args; in self;

in {
  ruby_1_9_3 = generic {
    majorVersion = "1";
    minorVersion = "9";
    teenyVersion = "3";
    patchLevel = "551";
    sha256 = {
      src = "1s2ibg3s2iflzdv7rfxi1qqkvdbn2dq8gxdn0nxrb77ls5ffanxv";
      git = "1r9xzzxmci2ajb34qb4y1w424mz878zdgzxkfp9w60agldxnb36s";
    };
  };

  ruby_2_0_0 = generic {
    majorVersion = "2";
    minorVersion = "0";
    teenyVersion = "0";
    patchLevel = "647";
    sha256 = {
      src = "1v2vbvydarcx5801gx9lc6gr6dfi0i7qbzwhsavjqbn79rdsz2n8";
      git = "186pf4q9xymzn4zn1sjppl1skrl5f0159ixz5cz8g72dmmynq3g3";
    };
  };

  ruby_2_1_7 = generic {
    majorVersion = "2";
    minorVersion = "1";
    teenyVersion = "7";
    patchLevel = "0";
    sha256 = {
      src = "10fxlqmpbq9407zgsx060q22yj4zq6c3czbf29h7xk1rmjb1b77m";
      git = "1fmbqd943akqjwsfbj9bg394ac46qmpavm8s0kv2w87rflrjcjfb";
    };
  };

  ruby_2_2_3 = generic {
    majorVersion = "2";
    minorVersion = "2";
    teenyVersion = "3";
    patchLevel = "0";
    sha256 = {
      src = "1kpdf7f8pw90n5bckpl2idzggk0nn0240ah92sj4a1w6k4pmyyfz";
      git = "1ssq3c23ay57ypfis47y2n817hfmb71w0xrdzp57j6bv12jqmgrx";
    };
  };

  ruby_2_3_0 = generic {
    majorVersion = "2";
    minorVersion = "3";
    teenyVersion = "0";
    patchLevel = "0";
    sha256 = {
      # src = "1ssq3c23ay57ypfis47y2n817hfmb71w0xrdzp57j6bv12jqmgrx";
      src = "01z5cya4a7y751d4pb3aak5qcwmmvnwkbgz9z171p8hsbw7acnxs";
      git = "0nl0pp96m0jxi422mqx09jqn9bff90pzz0xxa0ikrx7by0g00npg";
    };
  };
}