In reply to@adis:blad.is
Nixpkgs is stuck with it's crummy manual packaging, and I don't see any way to push any kinda sanity forward there

In reply to @k900:0upti.me
I think there's value in unvendoring dependencies the way nixpkgs does

In reply to @k900:0upti.me
Like I think pyproject.nix would be great in nixpkgs

If you'd take the pyproject.nix approach with an abstract project representation and renderers you could do something like

 let 
  project = load ./pyproject.toml;
  attrs = render python3 project;
attrs // {
  buildInputs = attrs.buildInputs ++ [ pkgs.openssl ];
}

If you'd take the pyproject.nix approach with an abstract project representation and renderers you could do something like

 let 
  project = load ./pyproject.toml;
  attrs = render python3 project;
in
python3.buildPythonPackage (attrs // {
  buildInputs = attrs.buildInputs ++ [ pkgs.openssl ];
})

If you'd take the pyproject.nix approach with an abstract project representation and renderers you could do something like

 let 
  project = load ./pyproject.toml;
  attrs = render python3 project;
in
python3.buildPythonPackage (attrs // {
  buildInputs = attrs.buildInputs ++ [ pkgs.openssl ];
})

Thinking a bit out loud here about a possible interface for lock files:

{ lib, pkgs, poetry2nix, pyproject }:
let
  # Stub attrs, not yet implemented
  pdm = { };
  overlays = { };

  # Use project abstraction from pyproject.nix
  project = pyproject.project.loadPyproject {
    pyproject = lib.importTOML ./pyproject.toml;
  };

  # Python packages overlay
  overlay = let
    # Create an overlay from pdm.lock
    pdmPackages = pdm.mkOverlay {
      pyproject = lib.importTOML ./pyproject.toml;
      pdmLock = lib.importTOML ./pdm.lock;
    };
    # Pdm.lock is not having PEP-517 build systems locked, use overrides from poetry2nix
    pdmWithBuild = overlays.intersect pdmPackages poetry2nix.overlays.build-systems;
  # Only apply build system overrides to packages that actually need them (packages created by the overlay generator)
  in overlays.intersect pdmPackages poetry2nix.build-systems;

  # Create an overriden interpreter
  python = pkgs.python3.override {
    # Note the self argument.
    # It's important so the interpreter/set is internally consistent.
    self = python;
    packageOverrides = overlay;
  };

  # Render buildPythonPackage with our overriden interpreter
  attrs = pyproject.lib.renderers.buildPythonPackage { inherit python project; };

in python.pkgs.buildPythonPackage attrs

Thinking a bit out loud here about a possible interface for lock files (cross post from #pyproject.nix:blad.is ):

{ lib, pkgs, poetry2nix, pyproject }:
let
  # Stub attrs, not yet implemented
  pdm = { };
  overlays = { };

  # Use project abstraction from pyproject.nix
  project = pyproject.project.loadPyproject {
    pyproject = lib.importTOML ./pyproject.toml;
  };

  # Python packages overlay
  overlay = let
    # Create an overlay from pdm.lock
    pdmPackages = pdm.mkOverlay {
      pyproject = lib.importTOML ./pyproject.toml;
      pdmLock = lib.importTOML ./pdm.lock;
    };
    # Pdm.lock is not having PEP-517 build systems locked, use overrides from poetry2nix
    pdmWithBuild = overlays.intersect pdmPackages poetry2nix.overlays.build-systems;
  # Only apply build system overrides to packages that actually need them (packages created by the overlay generator)
  in overlays.intersect pdmPackages poetry2nix.build-systems;

  # Create an overriden interpreter
  python = pkgs.python3.override {
    # Note the self argument.
    # It's important so the interpreter/set is internally consistent.
    self = python;
    packageOverrides = overlay;
  };

  # Render buildPythonPackage with our overriden interpreter
  attrs = pyproject.lib.renderers.buildPythonPackage { inherit python project; };

in python.pkgs.buildPythonPackage attrs