Hi,
I'm trying to understand how to use poetry2nix but I've this poroblem, this is my current flake.nix:

{
  description = "My Python application";

  inputs = {
    nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
    flake-utils-plus.url = github:gytis-ivaskevicius/flake-utils-plus/v1.3.1;
  };

  outputs = { self, nixpkgs, flake-utils-plus }:
    flake-utils-plus.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};

        caseGeneratorApp = pkgs.poetry2nix.mkPoetryEnv {
          projectDir = ./case;
          editablePackageSources = {
            src = ./case/src;
          };
        };

        packageName = "case_generator";
      in
      {

        defaultPackage = caseGeneratorApp;
        devShell = pkgs.mkShell {
          name = "development";
          buildInputs = [
            caseGeneratorApp
          ];
        };
      });
}

When I enter in the development shell withnix develop I get the scripts exposed by poetry and configured in the pyproject.toml in my PATH, and I can correctly execute them. But if I edit these sources (in ./case/src/) it makes no difference. I've to exit and re-enter in the shell to make the changes work.

Am I doing things correctly? If someone know a simple and working flake using poetry2nix I would be happy to take a look.

Thank you

In reply to @aciceri:nixos.dev

Hi,
I'm trying to understand how to use poetry2nix but I've this poroblem, this is my current flake.nix:

{
  description = "My Python application";

  inputs = {
    nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
    flake-utils-plus.url = github:gytis-ivaskevicius/flake-utils-plus/v1.3.1;
  };

  outputs = { self, nixpkgs, flake-utils-plus }:
    flake-utils-plus.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};

        caseGeneratorApp = pkgs.poetry2nix.mkPoetryEnv {
          projectDir = ./case;
          editablePackageSources = {
            src = ./case/src;
          };
        };

        packageName = "case_generator";
      in
      {

        defaultPackage = caseGeneratorApp;
        devShell = pkgs.mkShell {
          name = "development";
          buildInputs = [
            caseGeneratorApp
          ];
        };
      });
}

When I enter in the development shell withnix develop I get the scripts exposed by poetry and configured in the pyproject.toml in my PATH, and I can correctly execute them. But if I edit these sources (in ./case/src/) it makes no difference. I've to exit and re-enter in the shell to make the changes work.

Am I doing things correctly? If someone know a simple and working flake using poetry2nix I would be happy to take a look.

Thank you

In reply to @aciceri:nixos.dev
Ahh, I understand. What do you suggest me then? What would be the correct way to use a flake to manage a development flow like this?

I've seen people using --impure combined with environment variables to reference paths outside of the store.
That could work.

I'm not a flakes user so I might not be of too much help.

here is a copy paste of an example from one of the apps I packaged last week

      devShell = (pkgs.poetry2nix.mkPoetryEnv {
        projectDir = ./.;
        editablePackageSources.YOUR_APP = ./YOUR_SRC_DIR;
      }).env.overrideAttrs (old: {
        propagatedNativeBuildInputs = (old.propagatedNativeBuildInputs or [ ]) ++ nativeDependencies;
        shellHook = (old.shellHook or "") + ''
          export GDAL_LIBRARY_PATH="${pkgs.gdal}/lib/libgdal.so"
          export GEOS_LIBRARY_PATH="${pkgs.geos}/lib/libgeos_c.so"
        '';
        buildInputs = extraDevDependencies;
      });

In reply to @averagechris:matrix.org
zrsk: I have been packaging a few python apps as nix flakes. I'm no expert, but what's worked for me with editable installs is mkPoetryEnv as devShell instead of mkShell with the env as an input

hello folks, I'm trying to use poetry2nix (total noob in nix, sorry) with a new project I'm developing.

it's weird that I can run this without problems:

> nix develop -c python -c 'import plumbum; print(plumbum.__file__)'
warning: Git tree '/var/home/yajo/prodevel/automirror' is dirty
/nix/store/5vnfif1w37raxbaxqn5qvpc9caqdgrkf-python3-3.9.6-env/lib/python3.9/site-packages/plumbum/__init__.py

however, when I attempt to build it, it fails:

> nix build
warning: Git tree '/var/home/yajo/prodevel/automirror' is dirty
error: --- Error -------------------------------------------------------------------------------------------------------------------------------------------------------------- nix
builder for '/nix/store/6s1kmxzh0nm65hj0zb18f1hs913szy0q-python3.9-automirror-0.0.0.drv' failed with exit code 1; last 10 log lines:
  Removed build tracker: '/build/pip-req-tracker-3skg7iy7'
  Finished creating a wheel...
  Finished executing pipBuildPhase
  installing
  Executing pipInstallPhase
  /build/source/dist /build/source
  Processing ./automirror-0.0.0-py3-none-any.whl
  Requirement already satisfied: git-aggregator<3.0.0,>=2.1.0 in /nix/store/nv8c0dhjcqxdrr08wgp25al6qfiqs5kk-python3.9-git-aggregator-2.1.0/lib/python3.9/site-packages (from automirror==0.0.0) (2.1.0)
  ERROR: Could not find a version that satisfies the requirement plumbum<2.0.0,>=1.7.2 (from automirror) (from versions: none)
  ERROR: No matching distribution found for plumbum<2.0.0,>=1.7.2

of course, plumbum is in my dependencies, added with poetry add plumbum just like normal; actually there's another dependency and that one gives no problems