ruby: install rubygems directly into the derivation

Having a separate rubygems package can lead to split-brain scenarios.

Since rubygems is designed to replace himself on a ruby installation,
let's do that.

pkgs/development/interpreters/ruby/build-ruby-gem/default.nix

@@ -18,7 +18,7 @@
 # Normal gem packages can be used outside of bundler; a binstub is created in
 # $out/bin.
 
-{ lib, ruby, rubygems, bundler, fetchurl, fetchgit, makeWrapper, git,
+{ lib, ruby, bundler, fetchurl, fetchgit, makeWrapper, git,
   buildRubyGem, darwin
 } @ defs:
 
@@ -54,9 +54,6 @@ lib.makeOverridable (
 
 let
   shellEscape = x: "'${lib.replaceChars ["'"] [("'\\'" + "'")] x}'";
-  rubygems = (attrs.rubygems or defs.rubygems).override {
-    inherit ruby;
-  };
   src = attrs.src or (
     if type == "gem" then
       fetchurl {
@@ -79,14 +76,14 @@ let
 in
 
 stdenv.mkDerivation (attrs // {
-  inherit ruby rubygems;
+  inherit ruby;
   inherit doCheck;
   inherit dontBuild;
   inherit dontStrip;
   inherit type;
 
   buildInputs = [
-    ruby rubygems makeWrapper
+    ruby makeWrapper
   ] ++ lib.optionals (type == "git") [ git bundler ]
     ++ lib.optional stdenv.isDarwin darwin.libobjc
     ++ buildInputs;

pkgs/development/interpreters/ruby/bundler-env/default.nix

@@ -1,6 +1,5 @@
 { stdenv, runCommand, writeText, writeScript, writeScriptBin, ruby, lib
 , callPackage, defaultGemConfig, fetchurl, fetchgit, buildRubyGem, buildEnv
-, rubygems
 , git
 , makeWrapper
 , bundler
@@ -28,10 +27,9 @@ let
   );
   hasBundler = builtins.hasAttr "bundler" importedGemset;
   bundler = if hasBundler then gems.bundler else defs.bundler.override (attrs: { inherit ruby; });
-  rubygems = defs.rubygems.override (attrs: { inherit ruby; });
   gems = lib.flip lib.mapAttrs configuredGemset (name: attrs:
     buildRubyGem ((removeAttrs attrs ["source"]) // attrs.source // {
-      inherit ruby rubygems;
+      inherit ruby;
       gemName = name;
       gemPath = map (gemName: gems."${gemName}") (attrs.dependencies or []);
     }));
@@ -45,7 +43,6 @@ let
 
     cd $out
     chmod +w Gemfile.lock
-    source ${rubygems}/nix-support/setup-hook
     export GEM_PATH=${bundler}/${ruby.gemPath}
     ${ruby}/bin/ruby -rubygems -e \
       "require 'bundler'; Bundler.definition.lock('Gemfile.lock')"
@@ -56,8 +53,6 @@ let
     paths = envPaths;
     pathsToLink = [ "/lib" ];
     postBuild = ''
-      source ${rubygems}/nix-support/setup-hook
-
       ${ruby}/bin/ruby ${./gen-bin-stubs.rb} \
         "${ruby}/bin/ruby" \
         "${confFiles}/Gemfile" \

pkgs/development/interpreters/ruby/default.nix

@@ -9,6 +9,10 @@ let
   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}.${teenyVersion}";
@@ -32,12 +36,8 @@ let
       , autoreconfHook, bison, autoconf
       , darwin ? null
       }:
-      stdenv.mkDerivation rec {
-        inherit version;
-
-        name = "ruby-${version}";
-
-        src = if useRailsExpress then fetchFromGitHub {
+      let rubySrc =
+        if useRailsExpress then fetchFromGitHub {
           owner  = "ruby";
           repo   = "ruby";
           rev    = tag;
@@ -46,6 +46,18 @@ let
           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";
@@ -67,11 +79,15 @@ let
 
         enableParallelBuilding = true;
 
-        patches = (import ./patchsets.nix {
+        patches =
+          [ ./gem_hook.patch ] ++
+          (import ./patchsets.nix {
             inherit patchSet useRailsExpress ops patchLevel;
           })."${versionNoPatch}";
 
-        postUnpack = opString isRuby21 ''
+        postUnpack = ''
+          cp -r ${unpackdir rubygemsSrc} ${sourceRoot}/rubygems
+        '' + opString isRuby21 ''
           rm "$sourceRoot/enc/unicode/name2ctype.h"
         '';
 
@@ -99,6 +115,11 @@ let
         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
@@ -119,7 +140,7 @@ let
 
         meta = {
           license = stdenv.lib.licenses.ruby;
-          homepage = "http://www.ruby-lang.org/en/";
+          homepage = http://www.ruby-lang.org/en/;
           description = "The Ruby language";
           platforms = stdenv.lib.platforms.all;
         };

pkgs/development/interpreters/ruby/gem_hook.patch

@@ -1,7 +1,7 @@
-diff --git a/lib/rubygems/installer.rb b/lib/rubygems/installer.rb
+diff --git a/rubygems/lib/rubygems/installer.rb b/rubygems/lib/rubygems/installer.rb
 index d1ef3cb..bf15652 100755
---- a/lib/rubygems/installer.rb
-+++ b/lib/rubygems/installer.rb
+--- a/rubygems/lib/rubygems/installer.rb
++++ b/rubygems/lib/rubygems/installer.rb
 @@ -545,6 +545,13 @@ Results logged to #{File.join(Dir.pwd, 'gem_make.out')}
  
        say path if Gem.configuration.really_verbose

pkgs/development/interpreters/ruby/rubygems-src.nix

@@ -0,0 +1,8 @@
+{ fetchurl
+, version ? "2.4.8"
+, sha256 ? "0pl4civyf0vhqsqbqaivvxrb3fsg8sid9a8jv5vfnk4hypz3ahss"
+}:
+fetchurl {
+  url = "http://production.cf.rubygems.org/rubygems/rubygems-${version}.tgz";
+  sha256 = sha256;
+}

pkgs/development/interpreters/ruby/rubygems.nix

@@ -1,35 +0,0 @@
-{ stdenv, lib, fetchurl, makeWrapper, ruby }:
-
-stdenv.mkDerivation rec {
-  name = "rubygems-${version}";
-  version = "2.4.8";
-  src = fetchurl {
-    url = "http://production.cf.rubygems.org/rubygems/${name}.tgz";
-    sha256 = "0pl4civyf0vhqsqbqaivvxrb3fsg8sid9a8jv5vfnk4hypz3ahss";
-  };
-
-  patches = [ ./gem_hook.patch ];
-
-  buildInputs = [ruby makeWrapper];
-
-  buildPhase = ":";
-
-  installPhase = ''
-    ruby setup.rb --prefix=$out/
-
-    wrapProgram $out/bin/gem --prefix RUBYLIB : $out/lib
-
-    find $out -type f -name "*.rb" |
-      xargs sed -i "s@/usr/bin/env@$(type -p env)@g"
-
-    mkdir -pv $out/nix-support
-    cat > $out/nix-support/setup-hook <<EOF
-    export RUBYOPT=rubygems
-    addToSearchPath RUBYLIB $out/lib
-    EOF
-  '';
-
-  meta = {
-    description = "A package management framework for Ruby";
-  };
-}

pkgs/top-level/all-packages.nix

@@ -5611,8 +5611,6 @@ let
   ruby_2_2 = ruby_2_2_3;
   ruby_2_3 = ruby_2_3_0;
 
-  rubygems = hiPrio (callPackage ../development/interpreters/ruby/rubygems.nix {});
-
   scsh = callPackage ../development/interpreters/scsh { };
 
   scheme48 = callPackage ../development/interpreters/scheme48 { };
@@ -16517,6 +16515,7 @@ aliases = with self; rec {
   rdiff_backup = rdiff-backup;  # added 2014-11-23
   rekonqWrapper = rekonq; # added 2015-01
   rssglx = rss-glx; #added 2015-03-25
+  rubygems = throw "deprecated 2016-03-02: rubygems is now bundled with ruby";
   rxvt_unicode_with-plugins = rxvt_unicode-with-plugins; # added 2015-04-02
   samsungUnifiedLinuxDriver = samsung-unified-linux-driver; # added 2016-01-25
   saneBackends = sane-backends; # added 2016-01-02