Making this work in nixpkgs

[CMCDragonkai]

I've noticed grpc-haskell and loads of downstream deps are broken in nixpkgs master.

However since it is working here, it should be possible to make it work in nixpkgs as well.

First was proto3-wire which had an older version, fixed by overriding with a custom derivation pointing to the 1.2.0.

Second thing was parameterized. It was fixed by disabling tests: louispan/parameterized#2

Third thing was proto3-suite with 1 test failure due to a missing test file. Fixed by disabling tests.

But finally there's some C compilation issues. We can see alot of changes in release.nix but, not sure what is causing the C issues here.

Why not push up the specific overlays here to nixpkgs upstream so that grpc-haskell can work cleanly?

[nzhang-zh]

I tried importing the release.nix from this repo directly in my nix files.

But because we have a different nixpkgs pin, haskell package conflict occurs.

My shell.nix

{ pkgs ? import ./pkgs.nix }:

with pkgs;
let
  haskellPackages = haskell.packages.ghc865;
  grpc-haskell-src = builtins.fetchGit {
    url = https://github.com/awakesecurity/gRPC-haskell;
    rev = "d8f6e0b476797938f5c759146a2bbdc829ba1a84";
  };
  grpc-haskell = (import "${grpc-haskell-src}/release.nix").grpc-haskell;
  drv = (haskellPackages.callPackage ./default.nix { inherit grpc-haskell; }).env;
in
  drv.overrideAttrs (attrs: {
    src = null;
    nativeBuildInputs =...
    shellHook = ...
  })

Error message is:

Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: matrix-ark-0.1.0.0 (user goal)
[__1] trying: grpc-haskell-0.0.1.0/installed-IZB... (dependency of matrix-ark)
[__2] next goal: conduit-extra (dependency of matrix-ark)
[__2] rejecting: conduit-extra-1.3.5/installed-GDE... (conflict: grpc-haskell
=> async==2.2.2/installed-6rO..., conduit-extra =>
async==2.2.2/installed-Axg...)
[__2] fail (backjumping, conflict set: conduit-extra, grpc-haskell,
matrix-ark)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: grpc-haskell, matrix-ark,
conduit-extra

[CMCDragonkai]

This is still broken on Nixpkgs 21.05:

nix-repl> :b pkgs.haskellPackages.grpc-haskell      
builder for '/nix/store/6h7m7i87gk1mrj6iv7hg65nlx0c0jz2c-grpc-haskell-core-0.0.0.0.drv' failed with exit code 1; last 10 log lines:
  Using tar found on system at:
  /nix/store/hlmzk7zf3xp54dgf6kmk0qg13wc9ma8j-gnutar-1.34/bin/tar
  No uhc found
  building
  Preprocessing library for grpc-haskell-core-0.0.0.0..
  c2hs: Errors during expansion of binding hooks:
  
  src/Network/GRPC/Unsafe.chs:222: (column 7) [ERROR]  >>> Unknown identifier!
    Cannot find a definition for `grpc_channel_ping' in the header file.
cannot build derivation '/nix/store/6v5mc2mcmyqqwhpqy9j9mkzs4adjp32r-grpc-haskell-0.1.0.drv': 1 dependencies couldn't be built
[0 built (1 failed)]
error: build of '/nix/store/6v5mc2mcmyqqwhpqy9j9mkzs4adjp32r-grpc-haskell-0.1.0.drv' failed

[CMCDragonkai]

Tasty is resolved but preprocessing is still a problem. Seems like the default.nix needs to be fixed as well.