push sheeet

pkgs/development/interpreters/ruby/rubygems/0001-add-post-extract-hook.patch

@@ -0,0 +1,34 @@
+From a6485cfcdf51ff8be452980f93cebfea97f34dec Mon Sep 17 00:00:00 2001
+From: zimbatm <zimbatm@zimbatm.com>
+Date: Wed, 21 Sep 2016 09:32:34 +0100
+Subject: [PATCH 1/3] add post-extract hook
+
+Allows nix to execute scripts just after the gem extraction
+---
+ lib/rubygems/installer.rb | 10 +++++++++-
+ 1 file changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/lib/rubygems/installer.rb b/lib/rubygems/installer.rb
+index d26b1e88..bf18fb7f 100644
+--- a/lib/rubygems/installer.rb
++++ b/lib/rubygems/installer.rb
+@@ -848,7 +848,15 @@ TEXT
+   # Ensures that files can't be installed outside the gem directory.
+ 
+   def extract_files
+-    @package.extract_files gem_dir
++    ret = @package.extract_files gem_dir
++    if ENV['NIX_POST_EXTRACT_FILES_HOOK']
++      puts
++      puts "running NIX_POST_EXTRACT_FILES_HOOK #{ENV['NIX_POST_EXTRACT_FILES_HOOK']} #{gem_dir}"
++      system(ENV['NIX_POST_EXTRACT_FILES_HOOK'], gem_dir.to_s)
++      puts "running NIX_POST_EXTRACT_FILES_HOOK done"
++      puts
++    end
++    ret
+   end
+ 
+   ##
+-- 
+2.21.0
+

pkgs/development/interpreters/ruby/rubygems/0002-binaries-with-env-shebang.patch

@@ -0,0 +1,28 @@
+From 2e1328bcdddd35e557eabdff83ac07f3591dc693 Mon Sep 17 00:00:00 2001
+From: zimbatm <zimbatm@zimbatm.com>
+Date: Wed, 21 Sep 2016 19:37:05 +0100
+Subject: [PATCH 2/3] binaries with env shebang
+
+By default, don't point to the absolute ruby derivation path. As a user
+installing a gem in the home, it would freeze the selected ruby version
+to the currently-installed ruby derivation.
+---
+ lib/rubygems/dependency_installer.rb | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/rubygems/dependency_installer.rb b/lib/rubygems/dependency_installer.rb
+index 34620860..00ab31d9 100644
+--- a/lib/rubygems/dependency_installer.rb
++++ b/lib/rubygems/dependency_installer.rb
+@@ -17,7 +17,7 @@ class Gem::DependencyInstaller
+   extend Gem::Deprecate
+ 
+   DEFAULT_OPTIONS = { # :nodoc:
+-    env_shebang: false,
++    env_shebang: true,
+     document: %w[ri],
+     domain: :both, # HACK: dup
+     force: false,
+-- 
+2.21.0
+

pkgs/development/interpreters/ruby/rubygems/0003-gem-install-default-to-user.patch

@@ -0,0 +1,26 @@
+From d69249d0ff210316121b44d971ddd2439b1bc393 Mon Sep 17 00:00:00 2001
+From: zimbatm <zimbatm@zimbatm.com>
+Date: Wed, 21 Sep 2016 09:40:39 +0100
+Subject: [PATCH 3/3] gem install default to user
+
+Default to not installing gems to the read-only system derivation.
+---
+ lib/rubygems/path_support.rb | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/rubygems/path_support.rb b/lib/rubygems/path_support.rb
+index ed680d65..749b9ea6 100644
+--- a/lib/rubygems/path_support.rb
++++ b/lib/rubygems/path_support.rb
+@@ -24,7 +24,7 @@ class Gem::PathSupport
+   # hashtable, or defaults to ENV, the system environment.
+   #
+   def initialize(env)
+-    @home = normalize_home_dir(env["GEM_HOME"] || Gem.default_dir)
++    @home = normalize_home_dir(env["GEM_HOME"] || Gem.user_dir || Gem.default_dir)
+     @path = split_gem_path env["GEM_PATH"], @home
+ 
+     @spec_cache_dir = env["GEM_SPEC_CACHE"] || Gem.default_spec_cache_dir
+-- 
+2.21.0
+

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

@@ -0,0 +1,46 @@
+{
+  fetchurl,
+  gitUpdater,
+  lib,
+  stdenv,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "rubygems";
+  version = "3.7.1";
+
+  src = fetchurl {
+    url = "https://rubygems.org/rubygems/rubygems-${version}.tgz";
+    hash = "sha256-dQyMdxGA1B7SNYNE5UYe3ugxWMCoG3eZaaEzmWG8EWM=";
+  };
+
+  patches = [
+    ./0001-add-post-extract-hook.patch
+    ./0002-binaries-with-env-shebang.patch
+    ./0003-gem-install-default-to-user.patch
+  ];
+
+  installPhase = ''
+    runHook preInstall
+    cp -r . $out
+    runHook postInstall
+  '';
+
+  passthru.updateScript = gitUpdater {
+    url = "https://github.com/rubygems/rubygems.git";
+    rev-prefix = "v";
+    ignoredVersions = "(pre|alpha|beta|rc|bundler).*";
+  };
+
+  meta = with lib; {
+    description = "Package management framework for Ruby";
+    changelog = "https://github.com/rubygems/rubygems/blob/v${version}/CHANGELOG.md";
+    homepage = "https://rubygems.org/";
+    license = with licenses; [
+      mit # or
+      ruby
+    ];
+    mainProgram = "gem";
+    maintainers = with maintainers; [ zimbatm ];
+  };
+}