Pkg with `poetry`, `poetry2nix` and a `flake.nix`

flake.nix

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+# 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:
+{
+  description = "piker: trading gear for hackers (pkged with poetry2nix)";
+
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  inputs.poetry2nix = {
+    url = "github:nix-community/poetry2nix";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    poetry2nix,
+  }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        # use PWD as sources
+        projectDir = ./.;
+        pyproject = ./pyproject.toml;
+        poetrylock = ./poetry.lock;
+
+        # TODO: port to 3.11 and support both versions?
+        python = "python3.10";
+
+        # see https://github.com/nix-community/poetry2nix/tree/master#api
+        # for more functions and examples.
+        # inherit
+        # (poetry2nix.legacyPackages.${system})
+        # mkPoetryApplication;
+        # pkgs = nixpkgs.legacyPackages.${system};
+        pkgs = nixpkgs.legacyPackages.x86_64-linux;
+
+      in
+        {
+          # let
+          # devEnv = poetry2nix.mkPoetryEnv {
+          #     projectDir = ./.;
+          # };
+
+          packages = {
+            piker = poetry2nix.mkPoetryEditablePackage {
+            # env = poetry2nix.mkPoetryEnv {
+
+              # NOTE: taken from surrounding inputs
+              # projectDir = projectDir;
+              editablePackageSources = { piker = ./piker; };
+
+              # override msgspec to include setuptools as input
+              # https://github.com/nix-community/poetry2nix/blob/master/docs/edgecases.md#modulenotfounderror-no-module-named-packagenamed
+              overrides = poetry2nix.defaultPoetryOverrides.extend
+                (self: super: {
+                  msgspec = super.msgspec.overridePythonAttrs
+                    (
+                      old: {
+                        buildInputs = (old.buildInputs or [ ]) ++ [ super.setuptools ];
+                      }
+                    );
+                  }
+                );
+
+            };
+        };
+
+
+        # boot xonsh inside the poetry virtualenv when
+        # define the custom entry point via an expected
+        # output-attr that `nix-develop` scans for:
+        # https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-develop.html#flake-output-attributes
+        devShells.default = pkgs.mkShell {
+          # packages = [ poetry2nix.packages.${system}.poetry ];
+          packages = [ poetry2nix.packages.x86_64-linux.poetry ];
+          shellHook = "poetry run xonsh";
+          # shellHook = "poetry shell";
+        };
+      }
+    );
+}

pyproject.toml

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+[tool.poetry]
+name = "piker"
+version = "0.1.0.alpha0.dev0"
+description = "trading gear for hackers"
+authors = ["Tyler Goodlet <jgbt@protonmail.com>"]
+license = "AGPLv3"
+readme = "README.md"
+
+
+[tool.poetry.dependencies]
+python = "^3.10"
+tomli = "^2.0.1"
+tomli-w = "^1.0.0"
+colorlog = "^6.7.0"
+attrs = "^23.1.0"
+pygments = "^2.16.1"
+colorama = "^0.4.6"
+msgspec = "^0.18.0"
+typer = "^0.9.0"
+rich = "^13.5.2"
+trio = "^0.22.2"
+trio-websocket = "^0.10.3"
+trio-util = "^0.7.0"
+async-generator = "^1.10"
+asks = "^3.0.0"
+ib-insync = "^0.9.86"
+pendulum = "^2.1.2"
+bidict = "^0.22.1"
+cython = "^3.0.0"
+numpy = "1.24"
+numba = "^0.57.1"
+polars = "^0.18.13"
+pyqt5 = "^5.15.9"
+qdarkstyle = ">=3.0.2"
+fuzzywuzzy = {extras = ["speedup"], version = "^0.18.0"}
+xonsh = "^0.14.0"
+
+# pinned from git
+tractor = { path = '../tractor/', develop = true }
+# tractor = { git = 'https://github.com/goodboy/tractor.git', branch = 'piker_pin' }
+pyqtgraph = { git = 'https://github.com/pikers/pyqtgraph.git' }
+asyncvnc = { git = 'https://github.com/pikers/asyncvnc.git', branch = 'main' }
+tomlkit = { git = 'https://github.com/pikers/tomlkit.git', branch = 'piker_pin' }
+
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
+
+
+[tool.poetry.scripts]
+poetry = "poetry.console.application:main"