Enable `x86_64-darwin` for purs-bridge

[bladyjoker]

By just adding the system haskell.nix complains...

bladyjoker@morphism:~/Desktop/purescript-bridge$ nix -L --show-trace build .#test-all."x86_64-darwin"                                                                                    
warning: Git tree '/home/bladyjoker/Desktop/purescript-bridge' is dirty                                                                                                                  
trace: To make project.plan-nix for purescript-bridge a fixed-output derivation but not materialized, set `plan-sha256` to the output of the 'calculateMaterializedSha' script in 'passth
ru'.                                                                                                                                                                                     
trace: To materialize project.plan-nix for purescript-bridge entirely, pass a writable path as the `materialized` argument and run the 'updateMaterialized' script in 'passthru'.        
trace: To make project.plan-nix for purescript-bridge a fixed-output derivation but not materialized, set `plan-sha256` to the output of the 'calculateMaterializedSha' script in 'passth
ru'.                                                                                                                                                                                     
trace: To materialize project.plan-nix for purescript-bridge entirely, pass a writable path as the `materialized` argument and run the 'updateMaterialized' script in 'passthru'.        
error: a 'x86_64-darwin' with features {} is required to build '/nix/store/99vgr29sm65al3r02g5dc96wn87qbib7-nix-tools-plan-to-nix-pkgs.drv', but I am a 'x86_64-linux' with features {ben
chmark, big-parallel, kvm, nixos-test}                                                                                                                                                   
                                                                                                                                                                                         
       … while realising the context of path '/nix/store/0f37nza2l31rqwfdzmqd4byvqj80j3vv-nix-tools-plan-to-nix-pkgs'                                                                    
                                                                                                                                                                                         
       at /nix/store/3j90lc9a7kaydiw6q7gfglzg2w40fs47-source/lib/import-and-filter-project.nix:18:13:                                                                                    
                                                                                                                                                                                         
           17|   projectSubDir'' = if projectSubDir == "" then "" else projectSubDir + "/"; # With trailing /                                                                            
           18|   project = import "${projectNix}${projectSubDir'}";                                                                                                                      
             |             ^                                                                                                                                                             
           19| in project // {                                                                                                                                                           

       … while evaluating anonymous lambda

       at /nix/store/3j90lc9a7kaydiw6q7gfglzg2w40fs47-source/lib/import-and-filter-project.nix:5:1:

            4| { pkgs, haskellLib }:
            5| { projectNix, sourceRepos, src }:
             | ^
            6| let

       … from call site

       at /nix/store/3j90lc9a7kaydiw6q7gfglzg2w40fs47-source/overlays/haskell.nix:501:27:

          500|               callProjectResults = callCabalProjectToNix args;
          501|               plan-pkgs = importAndFilterProject {
             |                           ^
          502|                 inherit (callProjectResults) projectNix sourceRepos src;

       … while evaluating the attribute 'hsPkgs'

       at /nix/store/3j90lc9a7kaydiw6q7gfglzg2w40fs47-source/overlays/haskell.nix:527:43:

          526|               project = addProjectAndPackageAttrs rec {
          527|                   inherit (pkg-set.config) hsPkgs;
             |                                           ^
          528|                   inherit pkg-set;

[chfanghr]

It works on my machine for some reason (by reverting 0452ed8):

Update: make build-all and make test-all both work.

Update 2: we have some problems on M1 macOS - ghc is not cached. Maybe we can use binary cache from someone: input-output-hk/haskell.nix#1401 (comment)

Update 3: failed to build on M1

error: builder for '/nix/store/pjqqai59rz1fq7nh30x95d9p9xpgcrqg-scrypt-lib-scrypt-0.5.0.drv' failed with exit code 1;
       last 10 log lines:
       > /nix/store/hm2qzyqh6bh872rwlpjl4kw7a1nk173d-clang-wrapper-11.1.0/resource-root/include/mmintrin.h:525:12: error:
       >      error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
       >         return (__m64)__builtin_ia32_psubw((__v4hi)__m1, (__v4hi)__m2);
       >                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       >     |
       > 525 |     return (__m64)__builtin_ia32_psubw((__v4hi)__m1, (__v4hi)__m2);
       >     |            ^
       > fatal error: too many errors emitted, stopping now [-ferror-limit=]
       > 20 errors generated.
       > `cc' failed in phase `C Compiler'. (Exit code: 1)
       For full logs, run 'nix log /nix/store/pjqqai59rz1fq7nh30x95d9p9xpgcrqg-scrypt-lib-scrypt-0.5.0.drv'.
error: 1 dependencies of derivation '/nix/store/fj1spdbwjpgidxzvmbmbs5jwsxpmfm3p-ghc-shell-for-packages-env.drv' failed to build

[jhodgdev]

@bladyjoker any idea if this is going to be something simple to resolve?

[bladyjoker]

@bladyjoker any idea if this is going to be something simple to resolve?

Can't say really. On my side I can enable x86_64-darwin and aarch64-darwin, however, that's the easy part, making sure that works is beyond this repo. M1 is a fairly untested ground, x86 Darwin should work tho.

[jhodgdev]

No worries, mate. We are brainstorming a work-around for our use-case 👍

[peterbecich]

A.f.a.i.k. haskell.nix requires one of these solutions to build for both Linux and Mac:

• leave evalSystem blank; will build for both Linux and Mac; requires both builders?
• hard-code x86_64-darwin, x86_64-linux, aarch64-darwin, etc. Flake works for that system only?
• set evalSystem = builtins.currentSystem and use the --impure flag

I am writing this based upon my understanding of this comment (input-output-hk/haskell.nix#1401 (comment)) and some other troubleshooting.

I believe this question asks if flake-parts might be another solution: hercules-ci/flake-parts#84

[peterbecich]

I am trying to make the haskell.nix Flake work more easily between Mac and Linux: input-output-hk/haskell.nix#1825