Merge pull request #217866 from glittershark/add-back-rails

rubyPackages: Add back rails

Closes https://github.com/NixOS/nixpkgs/issues/193615
Closes https://github.com/NixOS/nixpkgs/issues/217691

pkgs/development/ruby-modules/gem-config/default.nix

@@ -229,6 +229,7 @@ in
 
   gpgme = attrs: {
     buildInputs = [ gpgme ];
+    nativeBuildInputs = [ pkg-config ];
     buildFlags = [ "--use-system-libraries" ];
   };
 

pkgs/development/ruby-modules/with-packages/Gemfile

@@ -110,7 +110,7 @@ gem 'pry-byebug'
 gem 'pry-doc'
 gem 'public_suffix'
 gem 'puma'
-# gem 'rails'  # causes the Bundler resolver to explode, probably due conflict with CocoaPods activesupport requirement
+gem 'rails'
 gem 'rainbow'
 # gem 'rbczmq' deprecated
 gem 'rbnacl'