Nicolas Pierron <[email protected]> writes: > Hi all, > > I wrote a bit of documentation to for people who cannot understand > NixOS logic. You might find main use case of modules described on > > https://nixos.org/wiki/NixOS:Modules
That's a nice overview! I just thought configuration.nix and other "no-declaration" modules were just the config attribute of a "full module". Reading the source (which is in nixpkgs, not nixos) made it clear eventually, but this wiki page sums it up nicely. Thanks! > > On Sat, Jul 21, 2012 at 9:25 AM, Mathijs Kwik <[email protected]> > wrote: >> Ah :) >> >> I did read the sources of lib/eval-config and saw that >> configuration.nix is just treated as a module, so I did understand >> that part. However it wasn't clear to me how to use that to add >> additional modules (config option "modules" of course doesn't exist). > > The reason is that modules are filtered to avoid duplicates and this > option may cause the evaluation of a configuration to have no > fix-point. > In addition, of having no fix-point, this is likely to cause a huge > memory consumption compared to our current system, which does not do > that well right now. > >> But indeed, now it's clear. Didn't see lib/modules in nixpkgs yet. >> Quite ingenious :) > > Thanks, I think I will keep this email around for the bad days :) > >> I'll revert my commit. >> >> On Sat, Jul 21, 2012 at 6:11 PM, Shea Levy <[email protected]> wrote: >>> Nope, it works for both. 'configuration files' are actually a >>> special case of a module (a module that has no options and >>> unconditionally sets other options). >>> >>> On Jul 21, 2012, at 12:05 PM, Mathijs Kwik <[email protected]> wrote: >>>> As I understood, "require" is for including configuration files (that >>>> set options). >>>> >>>> This new option allows adding modules, leading to new options to configure. >>>> >>>> On Sat, Jul 21, 2012 at 6:00 PM, Shea Levy <[email protected]> wrote: >>>>> How does the 'require' option not suit this need? >>>>> >>>>> On Jul 21, 2012, at 11:38 AM, Mathijs Kwik <[email protected]> >>>>> wrote: >>>>>> The environment variable "NIXOS_EXTRA_MODULES" is now checked to >>>>>> contain a path to a file similar to modules/module-list.nix. > > You might find some examples in my laptops configurations: > I browsed all you guys' configs a bit after Michael pointed me to that repo. Fortunately it's all quite similar to what I'm doing :) > https://nixos.org/repos/nix/configurations/trunk/misc/nicolas.b.pierron/ > > I made a few modules in the common directory which are included in > most of my configurations. Which was the first reason of NixOS module > system ;) Have a nice weekend, Mathijs _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
