mirror of
https://github.com/balkian/balkian.github.com.git
synced 2024-11-14 23:52:29 +00:00
59 lines
1.4 KiB
Markdown
59 lines
1.4 KiB
Markdown
|
---
|
||
|
|
date: '2023-11-13T18:21:46+01:00'
|
||
|
|
title: 'Nix Recipe for Python Projects'
|
||
|
|
---
|
||
|
|
|
||
|
|
|
||
|
|
This is a quick and easy recipe to add a `default.nix` to any Python project with a `requirements.txt` file:
|
||
|
|
|
||
|
|
|
||
|
|
```nix
|
||
|
|
with import <nixpkgs> { };
|
||
|
|
|
||
|
|
let
|
||
|
|
pythonPackages = python311Packages;
|
||
|
|
in pkgs.mkShell rec {
|
||
|
|
name = "impurePythonEnv";
|
||
|
|
venvDir = "./.venv";
|
||
|
|
buildInputs = [
|
||
|
|
# A python interpreter including the 'venv' module is required to bootstrap
|
||
|
|
# the environment.
|
||
|
|
pythonPackages.python
|
||
|
|
|
||
|
|
# This execute some shell code to initialize a venv in $venvDir before
|
||
|
|
# dropping into the shell
|
||
|
|
pythonPackages.venvShellHook
|
||
|
|
|
||
|
|
# Those are dependencies that we would like to use from nixpkgs, which will
|
||
|
|
# add them to PYTHONPATH and thus make them accessible from within the venv.
|
||
|
|
pythonPackages.numpy
|
||
|
|
pythonPackages.requests
|
||
|
|
|
||
|
|
# In this particular example, in order to compile any binary extensions they may
|
||
|
|
# require, the python modules listed in the hypothetical requirements.txt need
|
||
|
|
# the following packages to be installed locally:
|
||
|
|
taglib
|
||
|
|
openssl
|
||
|
|
git
|
||
|
|
libxml2
|
||
|
|
libxslt
|
||
|
|
libzip
|
||
|
|
zlib
|
||
|
|
];
|
||
|
|
|
||
|
|
# Now we can execute any commands within the virtual environment.
|
||
|
|
# This is optional and can be left out to run pip manually.
|
||
|
|
postShellHook = ''
|
||
|
|
pip install -r requirements.txt
|
||
|
|
'';
|
||
|
|
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
Now, you will get a clean environment by running:
|
||
|
|
|
||
|
|
```
|
||
|
|
nix-shell
|
||
|
|
```
|