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Redo `flake.nix` using `pyproject.nix` recos 

Particularly using their recommended "impure template",
- https://pyproject-nix.github.io/pyproject.nix/templates.html#impure
- code: https://github.com/pyproject-nix/pyproject.nix/blob/master/templates/impure/flake.nix

Note the `shellHook` now contains various `uv`-specific osenv settings
and cmds to get a dev-env setup the way i would do it by default, that
includes all dev and extra (group) deps. For now i've hard coded the
"virt-env subdir" used by `uv` to match the cpython version. We can
obviously parameterize this much better in the future.

For those who want to spawn a diff shell then bash see the commented
line, for ex. i personally use `nix develop -c uv run xonsh`.
nixround2_n_sway_testing
Tyler Goodlet 2025-12-16 12:15:40 -05:00
parent d4fe6b7717
commit b2fe31bfc6
1 changed files with 39 additions and 169 deletions
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flake.nix
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@ -1,180 +1,50 @@
# NOTE: to convert to a poetry2nix env like this here are the
# steps:
# - install poetry in your system nix config
# - convert the repo to use poetry using `poetry init`:
# https://python-poetry.org/docs/basic-usage/#initialising-a-pre-existing-project
# - then manually ensuring all deps are converted over:
# - add this file to the repo and commit it
# -
# GROKin tips:
# - CLI eps are (ostensibly) added via an `entry_points.txt`:
# - https://packaging.python.org/en/latest/specifications/entry-points/#file-format
# - https://github.com/nix-community/poetry2nix/blob/master/editable.nix#L49
# An "impure" template thx to `pyproject.nix`,
# https://pyproject-nix.github.io/pyproject.nix/templates.html#impure
# https://github.com/pyproject-nix/pyproject.nix/blob/master/templates/impure/flake.nix
{
description = "piker: trading gear for hackers (pkged with poetry2nix)";
description = "An impure `piker` overlay using `uv` with Nix(OS)";
inputs.flake-utils.url = "github:numtide/flake-utils";
inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
# see https://github.com/nix-community/poetry2nix/tree/master#api
inputs.poetry2nix = {
# url = "github:nix-community/poetry2nix";
# url = "github:K900/poetry2nix/qt5-explicit-deps";
url = "/home/lord_fomo/repos/poetry2nix";
inputs.nixpkgs.follows = "nixpkgs";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
};
outputs = {
self,
nixpkgs,
flake-utils,
poetry2nix,
}:
# TODO: build cross-OS and use the `${system}` var thingy..
flake-utils.lib.eachDefaultSystem (system:
let
# use PWD as sources
projectDir = ./.;
pyproject = ./pyproject.toml;
poetrylock = ./poetry.lock;
outputs =
{ nixpkgs, ... }:
let
inherit (nixpkgs) lib;
forAllSystems = lib.genAttrs lib.systems.flakeExposed;
in
{
devShells = forAllSystems (
system:
let
pkgs = nixpkgs.legacyPackages.${system};
in
{
default = pkgs.mkShell {
packages = [
pkgs.python313
pkgs.uv
];
# TODO: port to 3.11 and support both versions?
python = "python3.10";
shellHook = ''
unset PYTHONPATH
# for more functions and examples.
# inherit
# (poetry2nix.legacyPackages.${system})
# mkPoetryApplication;
# pkgs = nixpkgs.legacyPackages.${system};
# expose C++ stdlib to overlay
export LD_LIBRARY_PATH="${pkgs.stdenv.cc.cc.lib}/lib:$LD_LIBRARY_PATH"
pkgs = nixpkgs.legacyPackages.x86_64-linux;
lib = pkgs.lib;
p2npkgs = poetry2nix.legacyPackages.x86_64-linux;
# always use the ./py313/ venv-subdir
export UV_PROJECT_ENVIRONMENT="py313"
# define all pkg overrides per dep, see edgecases.md:
# https://github.com/nix-community/poetry2nix/blob/master/docs/edgecases.md
# TODO: add these into the json file:
# https://github.com/nix-community/poetry2nix/blob/master/overrides/build-systems.json
pypkgs-build-requirements = {
asyncvnc = [ "setuptools" ];
eventkit = [ "setuptools" ];
ib-insync = [ "setuptools" "flake8" ];
msgspec = [ "setuptools"];
pdbp = [ "setuptools" ];
pyqt6-sip = [ "setuptools" ];
tabcompleter = [ "setuptools" ];
tractor = [ "setuptools" ];
tricycle = [ "setuptools" ];
trio-typing = [ "setuptools" ];
trio-util = [ "setuptools" ];
xonsh = [ "setuptools" ];
};
# sync project-env with all extras
uv sync --dev --all-extras
# auto-generate override entries
p2n-overrides = p2npkgs.defaultPoetryOverrides.extend (self: super:
builtins.mapAttrs (package: build-requirements:
(builtins.getAttr package super).overridePythonAttrs (old: {
buildInputs = (
old.buildInputs or [ ]
) ++ (
builtins.map (
pkg: if builtins.isString pkg then builtins.getAttr pkg super else pkg
) build-requirements
);
})
) pypkgs-build-requirements
);
# override some ahead-of-time compiled extensions
# to be built with their wheels.
ahot_overrides = p2n-overrides.extend(
final: prev: {
# llvmlite = prev.llvmlite.override {
# preferWheel = false;
# };
# TODO: get this workin with p2n and nixpkgs..
# pyqt6 = prev.pyqt6.override {
# preferWheel = true;
# };
# NOTE: this DOESN'T work atm but after a fix
# to poetry2nix, it will and actually this line
# won't be needed - thanks @k900:
# https://github.com/nix-community/poetry2nix/pull/1257
pyqt5 = prev.pyqt5.override {
# withWebkit = false;
preferWheel = true;
};
# see PR from @k900:
# https://github.com/nix-community/poetry2nix/pull/1257
# pyqt5-qt5 = prev.pyqt5-qt5.override {
# withWebkit = false;
# preferWheel = true;
# };
# TODO: patch in an override for polars to build
# from src! See the details likely needed from
# the cryptography entry:
# https://github.com/nix-community/poetry2nix/blob/master/overrides/default.nix#L426-L435
polars = prev.polars.override {
preferWheel = true;
};
}
);
# WHY!? -> output-attrs that `nix develop` scans for:
# https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-develop.html#flake-output-attributes
in
rec {
packages = {
# piker = poetry2nix.legacyPackages.x86_64-linux.mkPoetryEditablePackage {
# editablePackageSources = { piker = ./piker; };
piker = p2npkgs.mkPoetryApplication {
projectDir = projectDir;
# SEE ABOVE for auto-genned input set, override
# buncha deps with extras.. like `setuptools` mostly.
# TODO: maybe propose a patch to p2n to show that you
# can even do this in the edgecases docs?
overrides = ahot_overrides;
# XXX: won't work on llvmlite..
# preferWheels = true;
# NOTE, to launch the py-venv installed `xonsh` (like @goodboy)
# run the `nix develop` cmd with,
# >> nix develop -c uv run xonsh
'';
};
};
# devShells.default = pkgs.mkShell {
# projectDir = projectDir;
# python = "python3.10";
# overrides = ahot_overrides;
# inputsFrom = [ self.packages.x86_64-linux.piker ];
# packages = packages;
# # packages = [ poetry2nix.packages.${system}.poetry ];
# };
# TODO: grok the difference here..
# - avoid re-cloning git repos on every develop entry..
# - ideally allow hacking on the src code of some deps
# (tractor, pyqtgraph, tomlkit, etc.) WITHOUT having to
# re-install them every time a change is made.
# - boot a usable xonsh inside the poetry virtualenv when
# defined via a custom entry point?
devShells.default = p2npkgs.mkPoetryEnv {
# env = p2npkgs.mkPoetryEnv {
projectDir = projectDir;
python = pkgs.python310;
overrides = ahot_overrides;
editablePackageSources = packages;
# piker = "./";
# tractor = "../tractor/";
# }; # wut?
};
}
); # end of .outputs scope
}
);
};
}