[Nix-dev] Handle runtime dependencies

[Wouter db]

Hi,

I don't get why you don't want to recompile when runtime dependencies 
change, they seem just as important to me as build time dependencies.

Don't you loose purity (dependablility) by this?

Wouter


Nicolas Pierron schreef:
> Hi,
>
> I have found a way to handle runtime dependencies which offer the
> opportunity to not recompile a program if its runtime dependencies
> have changed.The following code handle a new attribute
> (runtimeDependencies) inside mkDerivation. This attribute contains a
> derivation which has as source (src) the "clean" installed version.
>
>   addRuntimeDependenciesToDerivation = stdenv: stdenv //
>     { mkDerivation = args:
>         if args ? runtimeDependencies then
>           stdenv.mkDerivation ({
>             meta = args.meta;
>             name = args.name;
>             src = stdenv.mkDerivation (removeAttrs args
> ["runtimeDependencies"]);
>           } // args.runtimeDependencies)
>         else
>           stdenv.mkDerivation args
>         ;
>     };
>
> It is use as follow:
>
> { ... }:
>
> stdenv.mkDerivation rec {
>   name = "...";
>   src = fetchurl { ... };
>
>   runtimeDependencies = {
>      buildInputs = [ ... ];
>
>      buildCommand = '' ... '';
>   };
>
>   meta = { ... };
> }
>
> Should I commit this?
>
>