How to include dependencies from a github repo

[coot]

I am trying out Haskell.nix here. It's not clear to me how to add a missing dependency of cabal projects which are not yet published on hackage. When I run

nix-build -A monadic-party2019.components.library
error: attribute 'typed-protocols' missing, at /home/marcin/repos/coot/monadic-party-2019/.plan
.nix/monadic-party2019.nix:26:12

typed-protocols is missing, and my question is how to add it to the pkg set?

I followed these instructions to create default.nix, and pkgs.nix file from a plan.json created by cabal.

[rvl]

Thanks for the report. I think this is a either a bug or missing functionality in plan-to-nix.

I can reproduce it using the nix-tools from Haskell.nix master, and Cabal 2.4.

To make it build, the dependencies need to be added to the pkg-def-extras like this:

pkgSet = haskell.mkCabalProjectPkgSet {
  plan-pkgs = import ./pkgs.nix;
  pkg-def-extras = [
    (hackage: {
      packages = {
        typed-protocols = ./typed-protocols.nix;
        io-sim-classes = ./io-sim-classes.nix;
        io-sim = ./io-sim.nix;
        ouroboros-network = ./ouroboros-network.nix;
        contra-tracer = ./contra-tracer.nix;
      };
    })
  ];
  modules = [];
};

But then the files such as ./typed-protocols.nix need to be generated. I don't know if there's an easy way to do this.

If you set up a stack.yaml with those dependencies, loosen the pipes version bounds, fix some haddock syntax, and use stack-to-nix then it will build.

[coot]

Thanks @rvl

[angerman]

This is the plan.json cabal new-configure generates.

Specifically the entry to typed-protocols looks like:

    {
      "type": "configured",
      "id": "typed-protocols-0.1.0.0-inplace",
      "pkg-name": "typed-protocols",
      "pkg-version": "0.1.0.0",
      "flags": {},
      "style": "local",
      "pkg-src": {
        "type": "source-repo",
        "source-repo": {
          "type": "git",
          "location": "https://github.com/input-output-hk/ouroboros-network",
          "tag": "422c60bf4bf38d120dca97f75a4a1545928dfacd",
          "subdir": "typed-protocols"
        }
      },

This should be parsed correctly with the current source version of nix-tools.

Running plan-to-nix on it yields: https://gist.github.com/c026b4d270bbc23a19b8a09059f143bd

which curiously contains all the items.

Edit: so maybe we just need to bump nix-tools?

[ocharles]

I'm planning with haskell.nix today and struggling with this. I have

source-repository-package
  type: git
  location: https://github.com/circuithub/haskell-access
  tag: 272918c7a76157a7210e1468f6105864ace48fff

source-repository-package
  type: git
  location: https://github.com/circuithub/comparable-key
  tag: a784f7e45c53391acaa5e1b2407bc6298ea9b4a2

source-repository-package
  type: git
  location: https://github.com/circuithub/haskell-filepicker-policy
  tag: 661b5fc9ea7f27e313092f0a04b83d1a278cae96

source-repository-package
  type: git
  location: https://github.com/circuithub/haskell-gerber
  tag: f3127a77fe56933b965667b1c997643dbc265ea0
  subdir: gerber

source-repository-package
  type: git
  location: https://github.com/circuithub/haskell-gerber
  tag: f3127a77fe56933b965667b1c997643dbc265ea0
  subdir: gerber-diagrams

source-repository-package
  type: git
  location: https://github.com/circuithub/rel8
  tag: 30dd46dbdc61ef9dfb561b094a92626f26a5e5ac

in my cabal.project, and cabal new-configure has a plan that builds everything as expected. However, plan-to-nix only has access, comparable-key, filepicker-policy and rel8 - not gerber or gerber-diagrams. Perhaps something is struggling with things that use subdir?

[ocharles]

input-output-hk/nix-tools@3d02129 has a very relevant commit message, but it's not reachable from the pinned nix-tools here.

[angerman]

@ocharles can you try bumping nix-tools to the latest master and confirm that works?

[ocharles]

Have done so and I can confirm it works

[angerman]

Nix-Tools was bumped in #157

[masaeedu]

Sorry if this is off topic here, but is there an analogous way to depend on a Stack-based github project from a Cabal-based project that's been set up using haskell.nix?