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Poetry2nix

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https://github.com/nix-community/poetry2nix62 Servers

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22 Jan 2022
@k900:0upti.meK900It's that it doesn't even know you're trying to add stuff17:21:59
@k900:0upti.meK900And you're trying to add stuff that has native dependencies17:22:11
@k900:0upti.meK900And those dependencies need to exist in your shell17:22:19
@k900:0upti.meK900Which is managed by Nix, which doesn't know you're trying to add stuff17:22:29
@sephi:matrix.orgsephi The pillow dependency and all the other dependencies you see are already in my environment, I’m just trying to add gunicorn (which doesn’t have pillow as a dependency). I have no idea why poetry is trying to upgrade all these dependencies. 17:25:41
@sephi:matrix.orgsephi Ah it seems I can just do poetry add --lock gunicorn to only update the pyproject.toml & poetry.lock files without trying to install anything 17:37:23
@lelit:matrix.orglelit joined the room.20:05:15
23 Jan 2022
@mou_bugtracker:matrix.orgmou

i'm a little confused by nix scoping rules and closures. I have this minimal flake file

  description = "Application packaged using poetry2nix";

  inputs.flake-utils.url = "github:numtide/flake-utils";
  inputs.nixpkgs.url = "github:NixOS/nixpkgs";
  inputs.poetry2nix.url = "github:nix-community/poetry2nix";

  outputs = { self, nixpkgs, flake-utils, poetry2nix }:
    {
      # Nixpkgs overlay providing the application
      overlay = nixpkgs.lib.composeManyExtensions [
        poetry2nix.overlay
        (final: prev: {
          # The application
          myapp = prev.poetry2nix.mkPoetryApplication {
            projectDir = ./.;
          };
        })
      ];
    } // (flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ self.overlay ];
        };
      in
      {
        apps = {
          myapp = pkgs.myapp;
        };

        defaultApp = pkgs.myapp;
        devShell = poetry2nix.mkPoetryEnv {
          projectDir = ./.;
          editablePackageSources = {
            emptyproject = ./.;
          };
        };
       }));
}

And it's produce this error:

error: attribute 'mkPoetryEnv' missing

       at /nix/store/c0qrx1svg4p1xviy2jsmjsqmz09rbdjx-source/flake.nix:33:20:

           32|         defaultApp = pkgs.myapp;
           33|         devShell = poetry2nix.mkPoetryEnv {
             |                    ^
           34|           projectDir = ./.;
(use '--show-trace' to show detailed location information)

I expect what since poetr2nix is an binding references argument of outputs function, it will be available for evaluation of this function expression.

14:07:13
@mou_bugtracker:matrix.orgmou *

i'm a little confused by nix scoping rules and closures. I have this minimal flake file

  description = "Application packaged using poetry2nix";

  inputs.flake-utils.url = "github:numtide/flake-utils";
  inputs.nixpkgs.url = "github:NixOS/nixpkgs";
  inputs.poetry2nix.url = "github:nix-community/poetry2nix";

  outputs = { self, nixpkgs, flake-utils, poetry2nix }:
    {
      # Nixpkgs overlay providing the application
      overlay = nixpkgs.lib.composeManyExtensions [
        poetry2nix.overlay
        (final: prev: {
          # The application
          myapp = prev.poetry2nix.mkPoetryApplication {
            projectDir = ./.;
          };
        })
      ];
    } // (flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ self.overlay ];
        };
      in
      {
        apps = {
          myapp = pkgs.myapp;
        };

        defaultApp = pkgs.myapp;
        devShell = poetry2nix.mkPoetryEnv {
          projectDir = ./.;
          editablePackageSources = {
            emptyproject = ./.;
          };
        };
       }));
}

And it's produce this error:

error: attribute 'mkPoetryEnv' missing

       at /nix/store/c0qrx1svg4p1xviy2jsmjsqmz09rbdjx-source/flake.nix:33:20:

           32|         defaultApp = pkgs.myapp;
           33|         devShell = poetry2nix.mkPoetryEnv {
             |                    ^
           34|           projectDir = ./.;
(use '--show-trace' to show detailed location information)

I expect what since poetry2nix is an binding references argument of outputs function, it will be available for evaluation of this function expression.

14:07:39
@k900:0upti.meK900 poetry2nix the flake doesn't have a mkPoetryEnv attribute 14:08:56
@k900:0upti.meK900 The poetry2nix package in nixpkgs does 14:09:46
@k900:0upti.meK900If you want to use poetry2nix from git instead of the one in nixpkgs, you can use the overlay in the flake14:10:10
@mou_bugtracker:matrix.orgmou confusing. can i do import of git hosted flake in nix repl? to explore it and experiment 14:11:08
@k900:0upti.meK900 You can with builtins.getFlake 14:11:23
@mou_bugtracker:matrix.orgmouthanks14:11:30
@k900:0upti.meK900

But basically you want something like

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small";
    flake-utils.url = "github:numtide/flake-utils";
    poetry2nix = {
      url = "github:nix-community/poetry2nix";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-utils.follows = "flake-utils";
    };
  };

  outputs = { self, nixpkgs, flake-utils, poetry2nix }:
    flake-utils.lib.eachDefaultSystem
      (system:
        let
          pkgs = import nixpkgs {
            overlays = [ poetry2nix.overlay ];
            inherit system;
          };
        in
        {
          packages.your-app = pkgs.poetry2nix.mkPoetryApplication {
               # stuff
          };
        }
      )
}
14:12:38
@mou_bugtracker:matrix.orgmou

also expression in lambda passed to eachDefaultSystem contains this binding

  23           inherit system;
  24           overlays = [ self.overlay ];
  25         };

Does it import nixpkgs with revision locked by flake, or just version defined as channel?

14:13:24
@k900:0upti.meK900 import nixpkgs re-imports the nixpkgs input 14:14:00
@k900:0upti.meK900 import <nixpkgs> imports the channel 14:14:05
@k900:0upti.meK900 (and will fail if you're not using --impure) 14:14:14
@mou_bugtracker:matrix.orgmou *

also expression in lambda passed to eachDefaultSystem contains this binding

  22         pkgs = import nixpkgs {
  23           inherit system;
  24           overlays = [ self.overlay ];
  25         };

Does it import nixpkgs with revision locked by flake, or just version defined as channel?

14:14:31
@mou_bugtracker:matrix.orgmouthanks for clarification14:14:45
@mou_bugtracker:matrix.orgmouSo poetry2nix flake made all other functionality available through applying overlay to nixpkgs? So it kind of glue between everything defined in this flake modules and all other nix infrastructure?14:37:58
@k900:0upti.meK900poetry2nix is included in nixpkgs14:38:30
@k900:0upti.meK900The overlay just replaces the stable version in nixpkgs with the latest version from git14:38:43
@k900:0upti.meK900Well, not really latest, but whichever one you have pinned14:38:50
@mou_bugtracker:matrix.orgmou i'm trying to figure out how to work with shell and all my attempts to use mkPoetryEnv and using nix develop produces environments without python interpreter itself (and without poetry cli, but this is minor) even if derivation is called python3-3.9.9-env. I'm using snipets from Readme but have feelings i missed something important for understanding. 14:50:53
@mou_bugtracker:matrix.orgmouBut according to python mkPoetryEnv returns result of python.withPackages. I guess i need to read about this function too14:52:46
@mou_bugtracker:matrix.orgmou I found problem. I should use as devShell not the entire attirbute set returned by mkPoetryEnv, but only attribute env 15:16:12
@nialov:matrix.orgnialov joined the room.15:23:20

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