Re: [Nix-dev] break purity

Hi Oliver, Here is a minimal example stripped of all the other crap: https://github.com/fractalide/recompilation Cheers! /sjm ___ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev

Re: [Nix-dev] break purity

I'm afraid I don't really know what I'm looking at. Can you provide a smaller self-contained example that I can look at? On Sat, Apr 23, 2016 at 8:48 PM stewart mackenzie wrote: > Okay, I'm having a few problems implementing this, if you wouldn't > mind taking a look at this

Re: [Nix-dev] break purity

Okay, I'm having a few problems implementing this, if you wouldn't mind taking a look at this please: This is the package level default.nix which calls `buildFractalideComponent`: http://nixpaste.lbr.uno/ZTwRzV0-?nix Typically found here:

Re: [Nix-dev] break purity

Oliver, what is in prelude/shell.nix? (nix-build -E '(import prelude/shell.nix { nixpkgs = import /home/ollie/nixpkgs {}; }).dist') /sjm ___ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev

Re: [Nix-dev] break purity

On 16-04-22 06:33pm, Oliver Charles wrote: > It's certainly possible, because I just did it with Haskell ;) > > https://gist.github.com/ocharles/cbd5d7ce63bb570abb86e655f36435ab Why do you need to put the atime two hours in the past? Does cabal recompilation check for it in order to find out

Re: [Nix-dev] break purity

A completely different approach would be to somehow break up your big build into multiple derivations. This thread reminded me of nix-make: https://github.com/edolstra/nix-make/blob/master/examples/not-so-simple-header-auto/default.nix --Vladimir smime.p7s Description: S/MIME Cryptographic

Re: [Nix-dev] break purity

On 04/22/2016 08:33 PM, Oliver Charles wrote: > It's certainly possible, because I just did it with Haskell ;) > > https://gist.github.com/ocharles/cbd5d7ce63bb570abb86e655f36435ab Hehe, the classic Haskell approach: make the impurity explicit in order not to actually break purity...

Re: [Nix-dev] break purity

This is a clever optimization. Thank you Oliver. -- aycan > On 22 Apr 2016, at 21:33, Oliver Charles wrote: > > It's certainly possible, because I just did it with Haskell ;) > > https://gist.github.com/ocharles/cbd5d7ce63bb570abb86e655f36435ab > >> On Fri, Apr 22,

Re: [Nix-dev] break purity

You will save me hours of waiting in the future, definitely beer worthy! Much appreciated Oliver! On 23 Apr 2016 02:33, "Oliver Charles" wrote: > It's certainly possible, because I just did it with Haskell ;) > >

Re: [Nix-dev] break purity

It's certainly possible, because I just did it with Haskell ;) https://gist.github.com/ocharles/cbd5d7ce63bb570abb86e655f36435ab On Fri, Apr 22, 2016 at 7:16 PM stewart mackenzie wrote: > Yeah, I'm not so sure it's possible because one cannot copy from a > precompiled

Re: [Nix-dev] break purity

Yeah, I'm not so sure it's possible because one cannot copy from a precompiled derivation output to a new derivation output, ie copy cross derivation. As these multiple outputs (outputs = [x y z]) are seen as different derivations, this cannot happen right? Have you actually managed to make

Re: [Nix-dev] break purity

Ah, okay, I get your drift, I'll think how to make it succinct and tidy in the code :-) ___ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev

Re: [Nix-dev] break purity

Well you don't tie the knot in the expression itself. It's more that the pre-existing artefacts are a function input, and a function output: { stdenv, gcc, etc, artefacts ? null }: { preConfigure = "cp ${artefacts}/* .''; outputs = [ "out" "artefacts" ]; } Then you would nix-build to produce

Re: [Nix-dev] break purity

Interesting Oliver, though this sounds like it'll throw a recursive error. I'll investigate! cheers! ___ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev

Re: [Nix-dev] break purity

Something I'm experimenting with here is to actually have these intermediate artefacts be explicitly captured. I would use multiple outputs to have both the normal complete binaries, and another output for .o files and the like. Then you can feed this back in to future builds. Does that help?

[Nix-dev] break purity

Hi, I've got a bunch of artifacts being built in the /tmp/nix-build-component_name.drv-0 now I want to point the build manager, in this case cargo using the CARGO_TARGET_DIR env var to put the artifacts into a directory I make directly in the /tmp/target_${name} This way any further

Re: [Nix-dev] break purity

You can set up a build environment resembling what nix-build would use using the nix-shell command. All dependencies are provided, and each build phase gets a function. On 21 April 2016 at 17:42, stewart mackenzie wrote: > Hi, > > I've got a bunch of artifacts being built in