hi Pjotr, > > I don't know if setting search paths and environment variables and all > > is possible with Ruby gems. Is there any easy documentation about it? > > 'gem help install' gives quite a few options - including --bindir and > --install-dir. > > > In the past we have used wrapper packages for this. It would work a bit > > like this (but I don't know how it would impact Ruby things): > > > > 1 install a package with Nix > > 2 install addons > > 3 create an expression, which takes 1 and 2 as input and creates a > > wrapper package, that combines the two packages, using environment > > variables, search paths, and so on > > That works if you know the package beforehand. I think we have to > deal with 'addons' users want to install later. Most high-level > languages support this type of system: python eggs, ruby gems, perl > cpan, R modules etc. etc. By default they will install in /nix/store > where the language interpreter is installed. This causes problems.
Hm. I disagree there, but yes, there should be some solution. > I think the right thing to do is modify these package managers to > support Nix. Or provide good Nix expressions that can work with these package managers. We do this with more things. Wrappers are often not too hard to make. > The only other option is to allow 'addons' outside the store - as a > normal user would do under $HOME. However, how do we handle system > wide packages. > > One policy would be to say: > > - system wide: Use a Nix package > - user: Under $HOME > > That is the lazy option ;-). > > My problem is that I want to provide Ruby to biologists, and can not > support all GEMs they will think of. I still think that a wrapper that is a combination of Ruby plus all the gems you need for a certain package would be sufficient. Maybe we should just sit together for a few hours to just see if we can get it fixed without too much effort. armijn -- ------------------------------------------------------------------------- [EMAIL PROTECTED] | http://www.uulug.nl/ | UULug: Utrecht Linux Users Group ------------------------------------------------------------------------- _______________________________________________ nix-dev mailing list [email protected] https://mail.cs.uu.nl/mailman/listinfo/nix-dev
