Hi Taeer, For instance, the python model of > python27Packages.package1 > python27Packages.package2 > is very different from the haskell model of > (haskellPackages.ghcWithPackages (h: with h; [ > package1 > package2 > ])
Actually, they're quite similar. For Python we also have `python.buildEnv` and `python.withPackages` of which the use is identical to your Haskell example. In certain cases it is possible to install or use individual Python packages but using `python.buildEnv` or `python.withPackages` generally works better. On Fri, Jul 15, 2016 at 9:41 PM, Taeer Bar-Yam <[email protected]> wrote: > Dear Knowledgable Nixers, > > *Introduction* > I have been trying to get ruby gems installed in any way on my nixos > machine. I have been reading up on the wikis, and I understand that this is > not yet well put together. However, it seems that even things that aught to > be working are not. > > *Problem* > I put "bundler" in my configuration.nix, and it installs fine. However, > when I try to actually run it, I get the error message: > /nix/store/n5gqlhs1nmadxkbibv42wnxq3m7f404k-ruby-2.3.0-p0/lib/ruby/2.3.0/rubygems.rb:241:in > `bin_path': can't find gem bundler (>= 0) (Gem::GemNotFoundException) > from /run/current-system/sw/bin/bundler:14:in `<main>' > > I tried to add the gem I wanted to my configuration.nix directly using > buildRubyGem, but ruby was not able to find it. > > The method the manual prescribes is dependent on already having bundler > installed, so I have not had a chance to test that. > > *Request/Solution* > I am interested in contributing to the nix community by developing a > better system for ruby gem installation, so I guess what I am looking for > is the following: > > 1) For now, what is the current simplest way to install a ruby gem so that > I can, in the terminal, type > $ irb > > require 'desired_gem' > and it will work? > This can include simply installing bundler and using that locally with a > gemfile, but I would prefer that any system-wide installation be done > through configuration.nix > > 2) If I'm going to add a system for installing ruby gems, what would be > the right way to design it? I understand that programming languages > sometimes have structure that prevents us from always using the ideal path, > so can y'all point me to a programming language that is considered "done > right"? > > For instance, the python model of > python27Packages.package1 > python27Packages.package2 > > is very different from the haskell model of > (haskellPackages.ghcWithPackages (h: with h; [ > package1 > package2 > ]) > My understanding is that the haskell model is a less-than-ideal kludge > because haskell wont allow the python method. Is that right? Is there an > even better way than python? > > Lastly, is there anyone already working on this that I should get in touch > with instead of splitting efforts? > > Thank you, > --Taeer > > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev > >
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