Add nix support

[allgreed]

I'd love to use this tool as much as possible with the internal workflow, however, for that I'd need this package to be buildable with nix.

There is some PR #1 , however I was just trying to hack something quickly, clearly, as mentioned by @wbachnik we need to do better than that.

AC:

• dt-cli can be built with nix and used as a part of an env without downgrading libraries

Follow up ACs (probably worth splitting, but not sure):

• each release is automatically verified (CI) to be buildable with nix
• there is an "infrastrcture" (default.nix, .envrc) that allows local development with nix

Potential low hanging fruits after this issue:

• publishing to nixpkgs

Potentially useful + thoughs:

• poetry2nix
• I don't think that flakes are mature enough and provide sufficient cross-platform support to be utilized
• bumping downstream nixpkgs might provider newer versions of the packages and solve at least part of the problem temporarily

Current downstream, working nix expression:

  click-aliases = with pkgs.python38Packages; buildPythonPackage rec {
      pname = "click-aliases";
      version = "1.0.1";

      src = fetchPypi{
        inherit version;
        inherit pname;
        sha256 = "18q5wya46mdlm2g8x6bcxhzqf09nxy7lbvpqyh1fp207gq3i507l";
      };

      buildInputs = [ click ];
  };
  dtcli = with pkgs.python38Packages; buildPythonPackage rec {
      pname = "dt-cli";
      version = "0.0.9a0";

      src = fetchPypi{
        inherit version;
        inherit pname;
        sha256 = "17v90ykiph88dz1pxl801dpv6lc2ajsxns460zjjwbqpi9x2p1bv";
      };

      propagatedBuildInputs = [ pyyaml asn1crypto click click-aliases cryptography ];
  };

[vduseev]

I guess that's totally up to you @allgreed :) None of us currently use nix env in our workflow but being present in this field is a good thing right now. Even Hashicorp started actively delving into nix recently.

[allgreed]

Sure, I've assigned myself. But if anyone else has bandwidth and desire to deal with this before I do feel free to ping me ;)

[allgreed]

Packaging the release binary works ok, but this should stay open as the binary releases are a half-measure ;c

[allgreed]

Following expression works, with the caveats described below:

let
  nixpkgs = builtins.fetchGit {
    url = "https://github.com/nixos/nixpkgs/";
    ref = "refs/heads/nixos-unstable";
    rev = "e10da1c7f542515b609f8dfbcf788f3d85b14936";
    # obtain via `git ls-remote https://github.com/nixos/nixpkgs nixos-unstable`
    # 27-04-2022
  };
  pkgs = import nixpkgs { config = {}; };
  pythonCore = pkgs.python38;
  myAppEnv = pkgs.poetry2nix.mkPoetryEnv {
    projectDir = ./.;
    python = pythonCore;
    overrides = with pkgs; poetry2nix.overrides.withDefaults (self: super: {
      cryptography = super.cryptography.overridePythonAttrs(old:{
        cargoDeps = pkgs.rustPlatform.fetchCargoTarball {
          inherit (old) src;
          name = "${old.pname}-${old.version}";
          sourceRoot = "${old.pname}-${old.version}/src/rust/";
          sha256 = "sha256:01h511h6l4qvjxbaw662m1l84pb4wrhwxmnb3qj6ik13mx2m477m";
        };
        cargoRoot = "src/rust";
        nativeBuildInputs = old.nativeBuildInputs ++ (with pkgs.rustPlatform; [
          rust.rustc
          rust.cargo
          cargoSetupHook
        ]);
      });
      pyparsing = super.pyparsing.overridePythonAttrs (old: {
        buildInputs = (old.buildInputs or [ ]) ++ [
          self.flit-core
        ];
      });
    });
    #editablePackageSources = {
      #my-app = ./dtcli;
    #};
  };
in myAppEnv.env

Following steps need to be taken:

• this patch applied

  From c4f2a6c923e7af97932d9e2f6758abdacfae6dab Mon Sep 17 00:00:00 2001
  From: "Olgierd \"Allgreed\" Kasprowicz" <olgierd.kasprowicz@dynatrace.com>
  Date: Mon, 2 May 2022 20:30:13 +0200
  Subject: [PATCH] ble---
  pyproject.toml | 2 --
  1 file changed, 2 deletions(-)diff --git a/pyproject.toml b/pyproject.toml
  index 4f57912..ff9d3b0 100644
  --- a/pyproject.toml
  +++ b/pyproject.toml
  @@ -35,10 +35,8 @@ flake8-comprehensions = "^3.4.0"
  flake8-docstrings = "^1.6.0"
  flake8-import-order = "^0.18.1"
  flake8-polyfill = "^1.0.2"
  -ipython = "^7.22.0"
  mypy = "^0.812"
  pydocstyle = "^6.0.0"
  -pyinstaller = "^4.3"
  pytest = "^5.2"
  pytest-black = "^0.3.12"
  pytest-cov = "^2.11.1"
  -- 
  2.25.1

  Following commands ran:

  python -m venv env
  . env/bin/activate
  pip install poetry
  poetry lock

  So basically it works when we remove those 2 dev dependencies and regenerate the lock.

[vduseev]

Closing as this is out of scope now