Asciidoctor cannot find its gems

[ericsagnes]

Issue description

Asciidoctor is not working because it cannot find its gems.

Steps to reproduce

$ $(nix-build -A asciidoctor)/bin/asciidoctor
/nix/store/fcmv963alkwz92c83jmp8aibi0kphzir-ruby-2.2.7/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- bundler (LoadError)
        from /nix/store/fcmv963alkwz92c83jmp8aibi0kphzir-ruby-2.2.7/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from /nix/store/x581qik16cwkmhbbb8vdn0pbsd0hdal2-asciidoctor-1.5.5/bin/asciidoctor:15:in `<main>'

It happens that in the executable Gem.use_paths points to a non existing path:

Gem.use_paths("/nix/store/9wf7crpvsa996vdgzxy2y533hp6z2646-bundler-1.15.3/lib/ruby/gems/2.2.0", ENV["GEM_PATH"])

$ ls /nix/store/9wf7crpvsa996vdgzxy2y533hp6z2646-bundler-1.15.3/lib/ruby/gems/2.2.0
ls: cannot access '/nix/store/9wf7crpvsa996vdgzxy2y533hp6z2646-bundler-1.15.3/lib/ruby/gems/2.2.0': No such file or directory

But

$ ls /nix/store/9wf7crpvsa996vdgzxy2y533hp6z2646-bundler-1.15.3/lib/ruby/gems/2.3.0/
bin  build_info  cache  doc  extensions  gems  specifications

exists.

Note

The issue can be solved for asciidoctor by switching from ruby_2_2 to ruby in the asciidoctor nix expression.

cc maintainer @yacinehmito
@NeQuissimus that made recent changes to ruby.

Technical details

• System: (NixOS: 17.09pre111447.a7c8f5e419)
• Nix version: (nix-env (Nix) 1.11.13)
• Nixpkgs version: ( master, commit fd6e51d5505c128c2051ddcbcb395d12c0d94299)
• Sandboxing enabled: (true)

[yacinehmito]

The issue can be solved for asciidoctor by switching from ruby_2_2 to ruby in the asciidoctor nix expression.

Would you mind submitting a PR if it works for you?

[vcunat]

Fixed by the PR, I guess.