97 lines
2.5 KiB
Nix
97 lines
2.5 KiB
Nix
{
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description = "A Nix-flake-based Python development environment";
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inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1"; # unstable Nixpkgs
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outputs =
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{ self, ... }@inputs:
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let
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supportedSystems = [
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"x86_64-linux"
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"aarch64-linux"
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"x86_64-darwin"
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"aarch64-darwin"
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];
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forEachSupportedSystem =
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f:
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inputs.nixpkgs.lib.genAttrs supportedSystems (
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system:
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f {
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pkgs = import inputs.nixpkgs { inherit system; };
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}
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);
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/*
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Change this value ({major}.{min}) to
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update the Python virtual-environment
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version. When you do this, make sure
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to delete the `.venv` directory to
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have the hook rebuild it for the new
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version, since it won't overwrite an
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existing one. After this, reload the
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development shell to rebuild it.
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You'll see a warning asking you to
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do this when version mismatches are
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present. For safety, removal should
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be a manual step, even if trivial.
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*/
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version = "3.13";
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in
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{
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devShells = forEachSupportedSystem (
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{ pkgs }:
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let
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concatMajorMinor =
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v:
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pkgs.lib.pipe v [
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pkgs.lib.versions.splitVersion
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(pkgs.lib.sublist 0 2)
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pkgs.lib.concatStrings
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];
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python = pkgs."python${concatMajorMinor version}";
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in
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{
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default = pkgs.mkShellNoCC {
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venvDir = ".venv";
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postShellHook = ''
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venvVersionWarn() {
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local venvVersion
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venvVersion="$("$venvDir/bin/python" -c 'import platform; print(platform.python_version())')"
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[[ "$venvVersion" == "${python.version}" ]] && return
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cat <<EOF
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Warning: Python version mismatch: [$venvVersion (venv)] != [${python.version}]
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Delete '$venvDir' and reload to rebuild for version ${python.version}
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EOF
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}
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venvVersionWarn
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'';
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packages = with python.pkgs; [
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venvShellHook
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pip
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uv
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# Add whatever else you'd like here.
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# pkgs.basedpyright
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pkgs.black
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# or
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# python.pkgs.black
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pkgs.ruff
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# or
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# python.pkgs.ruff
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];
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};
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}
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);
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};
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}
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