looks like i almost get my first working flake with dev environment but ended up with code duplication to solve external library build dependency on poetry. And i can not think of good solution to extract duplication. Maybe anybody can suggest good idiomatic solution?

  description = "Exyaru (Atushka) project"; 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
          exyaru = prev.poetry2nix.mkPoetryApplication {
            projectDir = ./.;
            overrides = prev.poetry2nix.defaultPoetryOverrides.extend ( self: super: {
              uengine = super.uengine.overridePythonAttrs (
                old: {
                  buildInputs = (old.buildInputs or [ ]) ++ [ self.poetry ];
                }
              );
            });
          };
        })
      ];
    } // (flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ self.overlay ];
        };
      in
      rec {
        apps = {
          exyaru = pkgs.exyaru;
        };

        defaultApp = pkgs.exyaru;

        packages = {
          exyaru = pkgs.exyaru;
        };

        defaultPackage = pkgs.exyaru;

        devShell = (pkgs.poetry2nix.mkPoetryEnv {
          projectDir = ./.;
          overrides = pkgs.poetry2nix.defaultPoetryOverrides.extend ( self: super: {
            uengine = super.uengine.overridePythonAttrs (
              old: {
                buildInputs = (old.buildInputs or [ ]) ++ [ self.poetry ];
              }
            );
          });
          editablePackageSources = {
            exyaru = ./.;
          };
        }).env.overrideAttrs (oldAttrs: {
          buildInputs = [ pkgs.poetry ];
        });
      }));
}

looks like i almost get my first working flake with dev environment but ended up with code duplication to solve external library build dependency on poetry. And i can not think of good solution to extract duplication. Maybe anybody can suggest good idiomatic solution?

{
  description = "Exyaru (Atushka) project"; 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
          exyaru = prev.poetry2nix.mkPoetryApplication {
            projectDir = ./.;
            overrides = prev.poetry2nix.defaultPoetryOverrides.extend ( self: super: {
              uengine = super.uengine.overridePythonAttrs (
                old: {
                  buildInputs = (old.buildInputs or [ ]) ++ [ self.poetry ];
                }
              );
            });
          };
        })
      ];
    } // (flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ self.overlay ];
        };
      in
      rec {
        apps = {
          exyaru = pkgs.exyaru;
        };

        defaultApp = pkgs.exyaru;

        packages = {
          exyaru = pkgs.exyaru;
        };

        defaultPackage = pkgs.exyaru;

        devShell = (pkgs.poetry2nix.mkPoetryEnv {
          projectDir = ./.;
          overrides = pkgs.poetry2nix.defaultPoetryOverrides.extend ( self: super: {
            uengine = super.uengine.overridePythonAttrs (
              old: {
                buildInputs = (old.buildInputs or [ ]) ++ [ self.poetry ];
              }
            );
          });
          editablePackageSources = {
            exyaru = ./.;
          };
        }).env.overrideAttrs (oldAttrs: {
          buildInputs = [ pkgs.poetry ];
        });
      }));
}

Is there a way of overriding the package version specified by poetry and just using whatever is defined in nixpkgs instead? The command I'm imagining might naively look like this:

  overrides = pkgs.poetry2nix.overrides.withDefaults (self: super: {
    debugpy = pkgs.python3Packages.debugpy;
    ...

it builds fine, then at runtime I get this Expected: /nix/store/vx25bdp4pqfkmj5zh8vbkxl0z8l05kcd-python3-3.7.12-env/lib/python3.7/site-packages/debugpy/_vendored/pydevd/pydevd_attach_to_process/attach_x86_64.dylib to exist..

It looks like there's some build logic in https://github.com/NixOS/nixpkgs/blob/nixos-21.11/pkgs/development/python-modules/debugpy/default.nix to create the missing file.

I tried adding the preBuild to my overrides:

    debugpy = super.debugpy.overridePythonAttrs (
      old: {
        inherit (pkgs.python3Packages.debugpy) preBuild;
      }
    );

but then I just get a different runtime error /nix/store/qd710abqqj5b1g3zad6m7a4rrq7xa3ym-python3-3.7.12-env/lib/python3.7/site-packages/debugpy/_vendored/force_pydevd.py:20: UserWarning: incompatible copy of pydevd already imported.

Since it's a dev dependency I figured it might be simpler to just use the nix packaged version entirely?

In reply to @k900:0upti.me
There's a direnv plugin: https://github.com/fehnomenal/intellij-direnv

In reply to @k900:0upti.me
There's a direnv plugin: https://github.com/fehnomenal/intellij-direnv

In reply to @magisa:matrix.org
Hello all!
I am very new to this so apologies in advance if I ask something very dumb. I want to install lmdb bindings for python. However if i create a simple poetry pyproject.toml only with that dependancy the build fails. I understand why. It's because there is a very dumb line in there (https://github.com/jnwatson/py-lmdb/blob/master/setup.py#L117-L119) which tries to access /usr/bin/patch. That obviously does not exist on NixOS. I am trying to make this work but I am kind of struggling. If I was to build the package imperative stylez I would install lmdb and then export LMDB_FORCE_SYSTEM before calling setup.py. I know how do the former (I think) from extraPackages in mkPoetryEnv but I do not know how do the latter. I cannot find an option to add a bash script before the build.
Appreciate any help you can give me. Thx

i'm also beginner so my advice may not lead you to solution. But if i faced this problem, in first place i would look into implementation of this module in nixpkgs https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/python-modules/lmdb/default.nix

As i understand, for poetry2nix you can define override, which will apply changes to default derivation parameters right before building