Help with packaging a python application

Help
1

Hi! I would like to develop an application in python, but I’m having some difficulties with understanding flakes. This is what I’m having so far:

When I try:

user@kaktus ~/G/fuujin (main)> nix run .#fuujin
error: unable to execute '/nix/store/jnjyd134y9pr0v0cncdpyz7nj6f7y0p9-python3.11-fuujin-0.1.0/bin/fuujin': No such file or directory
user@kaktus ~/G/fuujin (main) [1]>

I get an error. Can you guys help me out?

2

To build an application, you need buildPythonApplication, and also your pyproject.toml has to define at least one entry point as far as I remember.

3

This is my flake.nix:

{
  description = "";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
        python = pkgs.python311;
      in
      {
        packages.fuujin = python.pkgs.buildPythonPackage rec {
          pname = "fuujin";
          version = "0.1.0";
#          license = pkgs.licenses.gpl;
          pyproject = true;
          src = ./fuujin;
          nativeBuildInputs = [ python.pkgs.setuptools ];
          propagatedBuildInputs = [
            python.pkgs.requests
            python.pkgs.numpy
          ];
        };
      });
}

I didn’t quite know what to put in pyproject.toml, so I left it empty…

4

I know how it looks like. I checked the repo. Doesn’t change what I said.

1 Like
5

I’m sorry, I understood that you didn’t look, because I used buildPythonPackage.

6

Yeah. But you need buildPythonApplication instead, and also your pyproject.toml needs to declare entry points.

7

f*

I could swear that I thought it’s the same… Thank you for your patience. However it still failed to execute:

user@kaktus ~/G/fuujin (main)> nix run .#fuujin
error: unable to execute '/nix/store/zb27kpxacd4xl7iz509k0dfpdcj7yvzi-fuujin-0.1.0/bin/fuujin': No such file or directory
user@kaktus ~/G/fuujin (main) [1]>
8

There is still no entry point.

9

Thank you, I didn’t understand you at that moment. After some time reading and following this guide:

I finally managed to get it working:

user@kaktus ~ (main)> tree
.
├── docs
│   └── main.md
├── flake.lock
├── flake.nix
├── fuujin
│   ├── __init__.py
│   ├── __main__.py
│   ├── master.py
│   └── __pycache__
│       └── master.cpython-311.pyc
├── fuujin.code-workspace
├── LICENSE
├── poetry.lock
├── pyproject.toml
├── README.md
├── result -> /nix/store/yh268ppq2dvglbmmaxmv9ld8xd4107cb-fuujin-0.1.0
└── TODO.md

5 directories, 13 files
user@kaktus ~ (main)>

pyproject.toml:

[project]
name = "fuujin"
version = "0.1.0"
description = ""

[tool.poetry.dependencies]
python = "^3.11"

[project.scripts]
fuujin = "fuujin.master:test"

Thank you for your help @NobbZ !