WIP: Add multi python examples

examples/v1-multi-python/code1/pypkg1/default.nix

@@ -0,0 +1,35 @@
+# NOTE: Move into top-level subdirectory to have all nix tooling in one place?
+{
+  config,
+  lib,
+  dream2nix,
+  ...
+}: let
+  l = lib // builtins;
+in {
+  imports = [
+    dream2nix.modules.drv-parts.mkDerivation
+    dream2nix.modules.drv-parts.pip
+  ];
+
+  name = "pypkg1";
+  version = "1";
+
+  deps = {nixpkgs, ...}: {
+    inherit (nixpkgs) stdenv;
+  };
+
+  mkDerivation = {
+    src = ./.;
+  };
+
+  pip = {
+    # NOTE: Pass via CLI or define once for multiple packages?
+    pypiSnapshotDate = "2023-06-30";
+
+    # NOTE: How do we select the optional dev dependencies?
+    requirementsFile = [
+      "."
+    ];
+  };
+}

examples/v1-multi-python/code1/pypkg1/pyproject.toml

@@ -0,0 +1,20 @@
+[build-system]
+requires = ["setuptools>=65.4.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+
+[project]
+name = "pypkg1"
+version = "1.0.0"
+dependencies = [
+  "cryptography"
+]
+
+[project.optional-dependencies]
+dev = [
+  "ruff",
+]
+
+
+[tool.setuptools.packages.find]
+where = ["src"]

examples/v1-multi-python/flake.nix

@@ -0,0 +1,43 @@
+{
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.dream2nix.url = "github:nix-community/dream2nix";
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    dream2nix,
+  }:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+        l = nixpkgs.lib // builtins;
+
+        callModule = module:
+          dream2nix.lib.evalModules {
+            packageSets = {
+              nixpkgs = pkgs;
+            };
+            modules = [
+              module
+              # ./lock.nix
+            ];
+          };
+
+        hello = callModule ./hello;
+        pypkg1 = callModule ./code1/pypkg1;
+      in {
+        devShell = pkgs.mkShell {
+          # SITEPACKAGES = pyenv.out + "/" + pyenv.sitePackages;
+          buildInputs = [
+            hello
+            pypkg1
+          ];
+        };
+
+        packages = {
+          inherit hello pypkg1;
+        };
+      }
+    );
+}

examples/v1-multi-python/hello/default.nix

@@ -0,0 +1,26 @@
+{
+  config,
+  lib,
+  dream2nix,
+  ...
+}: let
+  l = lib // builtins;
+in {
+  imports = [
+    dream2nix.modules.drv-parts.mkDerivation
+  ];
+
+  name = "hello";
+  version = "2.12";
+
+  deps = {nixpkgs, ...}: {
+    inherit (nixpkgs) stdenv;
+  };
+
+  mkDerivation = {
+    src = l.fetchTarball {
+      url = "https://ftp.gnu.org/gnu/hello/hello-${config.version}.tar.gz";
+      sha256 = "sha256-4GQeKLIxoWfYiOraJub5RsHNVQBr2H+3bfPP22PegdU=";
+    };
+  };
+}

examples/v1-pip-compile/README.md

@@ -0,0 +1,26 @@
+## Motivation
+
+A project consists of multiple python packages in different subdirectories. Each
+of these has dependencies and optional dev dependencies. Compiled requirements
+with hashes exist, written with pip-compile:
+
+- ``code1/pypkg1/requirements.txt``
+- ``code1/pypkg1/requirements-dev.txt``
+
+Two modes of operation:
+
+1. Use compiled requirements files and create nix lock files accordingly.
+2. Create nix lock files without using compiled requirements, but only
+   dependency declarations in pyproject.toml, and pip-compile afterwards for
+   projects not using nix.
+
+We'd like to create environments where requirements for individual packages and
+combinations of these packages are available.
+
+For the projects' python packages:
+
+1. Do not install, environment with requirements only.
+
+2. Install selected packages.
+
+3. Install selected packages in editable mode.

examples/v1-pip-compile/code1/pypkg1/default.nix

@@ -0,0 +1,49 @@
+# NOTE: Move into top-level subdirectory to have all nix tooling in one place?
+{
+  config,
+  lib,
+  dream2nix,
+  ...
+}: let
+  l = lib // builtins;
+in {
+  imports = [
+    dream2nix.modules.drv-parts.pip
+  ];
+
+  name = "pypkg1";
+  version = "1";
+
+  deps = {nixpkgs, ...}: {
+    inherit
+      (nixpkgs)
+      stdenv
+      ;
+    python = nixpkgs.python310;
+    setuptools = nixpkgs.python310Packages.setuptools;
+  };
+
+  mkDerivation = {
+    src = ./.;
+
+    # NOTE: Should be taken from pyproject.toml [build-sytem].
+    nativeBuildInputs = [
+      config.deps.setuptools
+    ];
+  };
+
+  buildPythonPackage = {
+    format = "pyproject";
+  };
+
+  pip = {
+    # NOTE: Pass via CLI or define once for multiple packages?
+    pypiSnapshotDate = "2023-06-30";
+
+    requirementsFiles = [
+      # NOTE: Switch flavour in central location
+      # "code1/pypkg1/requirements.txt",
+      "code1/pypkg1/requirements-dev.txt"
+    ];
+  };
+}

examples/v1-pip-compile/code1/pypkg1/pyproject.toml

@@ -0,0 +1,20 @@
+[build-system]
+requires = ["setuptools>=65.4.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+
+[project]
+name = "pypkg1"
+version = "1.0.0"
+dependencies = [
+  "cryptography"
+]
+
+[project.optional-dependencies]
+dev = [
+  "ruff",
+]
+
+
+[tool.setuptools.packages.find]
+where = ["src"]

examples/v1-pip-compile/code1/pypkg1/requirements-dev.txt

@@ -0,0 +1,116 @@
+#
+# This file is autogenerated by pip-compile with Python 3.10
+# by the following command:
+#
+#    pip-compile --extra=dev --generate-hashes --output-file=requirements-dev.txt pyproject.toml
+#
+cffi==1.15.1 \
+    --hash=sha256:00a9ed42e88df81ffae7a8ab6d9356b371399b91dbdf0c3cb1e84c03a13aceb5 \
+    --hash=sha256:03425bdae262c76aad70202debd780501fabeaca237cdfddc008987c0e0f59ef \
+    --hash=sha256:04ed324bda3cda42b9b695d51bb7d54b680b9719cfab04227cdd1e04e5de3104 \
+    --hash=sha256:0e2642fe3142e4cc4af0799748233ad6da94c62a8bec3a6648bf8ee68b1c7426 \
+    --hash=sha256:173379135477dc8cac4bc58f45db08ab45d228b3363adb7af79436135d028405 \
+    --hash=sha256:198caafb44239b60e252492445da556afafc7d1e3ab7a1fb3f0584ef6d742375 \
+    --hash=sha256:1e74c6b51a9ed6589199c787bf5f9875612ca4a8a0785fb2d4a84429badaf22a \
+    --hash=sha256:2012c72d854c2d03e45d06ae57f40d78e5770d252f195b93f581acf3ba44496e \
+    --hash=sha256:21157295583fe8943475029ed5abdcf71eb3911894724e360acff1d61c1d54bc \
+    --hash=sha256:2470043b93ff09bf8fb1d46d1cb756ce6132c54826661a32d4e4d132e1977adf \
+    --hash=sha256:285d29981935eb726a4399badae8f0ffdff4f5050eaa6d0cfc3f64b857b77185 \
+    --hash=sha256:30d78fbc8ebf9c92c9b7823ee18eb92f2e6ef79b45ac84db507f52fbe3ec4497 \
+    --hash=sha256:320dab6e7cb2eacdf0e658569d2575c4dad258c0fcc794f46215e1e39f90f2c3 \
+    --hash=sha256:33ab79603146aace82c2427da5ca6e58f2b3f2fb5da893ceac0c42218a40be35 \
+    --hash=sha256:3548db281cd7d2561c9ad9984681c95f7b0e38881201e157833a2342c30d5e8c \
+    --hash=sha256:3799aecf2e17cf585d977b780ce79ff0dc9b78d799fc694221ce814c2c19db83 \
+    --hash=sha256:39d39875251ca8f612b6f33e6b1195af86d1b3e60086068be9cc053aa4376e21 \
+    --hash=sha256:3b926aa83d1edb5aa5b427b4053dc420ec295a08e40911296b9eb1b6170f6cca \
+    --hash=sha256:3bcde07039e586f91b45c88f8583ea7cf7a0770df3a1649627bf598332cb6984 \
+    --hash=sha256:3d08afd128ddaa624a48cf2b859afef385b720bb4b43df214f85616922e6a5ac \
+    --hash=sha256:3eb6971dcff08619f8d91607cfc726518b6fa2a9eba42856be181c6d0d9515fd \
+    --hash=sha256:40f4774f5a9d4f5e344f31a32b5096977b5d48560c5592e2f3d2c4374bd543ee \
+    --hash=sha256:4289fc34b2f5316fbb762d75362931e351941fa95fa18789191b33fc4cf9504a \
+    --hash=sha256:470c103ae716238bbe698d67ad020e1db9d9dba34fa5a899b5e21577e6d52ed2 \
+    --hash=sha256:4f2c9f67e9821cad2e5f480bc8d83b8742896f1242dba247911072d4fa94c192 \
+    --hash=sha256:50a74364d85fd319352182ef59c5c790484a336f6db772c1a9231f1c3ed0cbd7 \
+    --hash=sha256:54a2db7b78338edd780e7ef7f9f6c442500fb0d41a5a4ea24fff1c929d5af585 \
+    --hash=sha256:5635bd9cb9731e6d4a1132a498dd34f764034a8ce60cef4f5319c0541159392f \
+    --hash=sha256:59c0b02d0a6c384d453fece7566d1c7e6b7bae4fc5874ef2ef46d56776d61c9e \
+    --hash=sha256:5d598b938678ebf3c67377cdd45e09d431369c3b1a5b331058c338e201f12b27 \
+    --hash=sha256:5df2768244d19ab7f60546d0c7c63ce1581f7af8b5de3eb3004b9b6fc8a9f84b \
+    --hash=sha256:5ef34d190326c3b1f822a5b7a45f6c4535e2f47ed06fec77d3d799c450b2651e \
+    --hash=sha256:6975a3fac6bc83c4a65c9f9fcab9e47019a11d3d2cf7f3c0d03431bf145a941e \
+    --hash=sha256:6c9a799e985904922a4d207a94eae35c78ebae90e128f0c4e521ce339396be9d \
+    --hash=sha256:70df4e3b545a17496c9b3f41f5115e69a4f2e77e94e1d2a8e1070bc0c38c8a3c \
+    --hash=sha256:7473e861101c9e72452f9bf8acb984947aa1661a7704553a9f6e4baa5ba64415 \
+    --hash=sha256:8102eaf27e1e448db915d08afa8b41d6c7ca7a04b7d73af6514df10a3e74bd82 \
+    --hash=sha256:87c450779d0914f2861b8526e035c5e6da0a3199d8f1add1a665e1cbc6fc6d02 \
+    --hash=sha256:8b7ee99e510d7b66cdb6c593f21c043c248537a32e0bedf02e01e9553a172314 \
+    --hash=sha256:91fc98adde3d7881af9b59ed0294046f3806221863722ba7d8d120c575314325 \
+    --hash=sha256:94411f22c3985acaec6f83c6df553f2dbe17b698cc7f8ae751ff2237d96b9e3c \
+    --hash=sha256:98d85c6a2bef81588d9227dde12db8a7f47f639f4a17c9ae08e773aa9c697bf3 \
+    --hash=sha256:9ad5db27f9cabae298d151c85cf2bad1d359a1b9c686a275df03385758e2f914 \
+    --hash=sha256:a0b71b1b8fbf2b96e41c4d990244165e2c9be83d54962a9a1d118fd8657d2045 \
+    --hash=sha256:a0f100c8912c114ff53e1202d0078b425bee3649ae34d7b070e9697f93c5d52d \
+    --hash=sha256:a591fe9e525846e4d154205572a029f653ada1a78b93697f3b5a8f1f2bc055b9 \
+    --hash=sha256:a5c84c68147988265e60416b57fc83425a78058853509c1b0629c180094904a5 \
+    --hash=sha256:a66d3508133af6e8548451b25058d5812812ec3798c886bf38ed24a98216fab2 \
+    --hash=sha256:a8c4917bd7ad33e8eb21e9a5bbba979b49d9a97acb3a803092cbc1133e20343c \
+    --hash=sha256:b3bbeb01c2b273cca1e1e0c5df57f12dce9a4dd331b4fa1635b8bec26350bde3 \
+    --hash=sha256:cba9d6b9a7d64d4bd46167096fc9d2f835e25d7e4c121fb2ddfc6528fb0413b2 \
+    --hash=sha256:cc4d65aeeaa04136a12677d3dd0b1c0c94dc43abac5860ab33cceb42b801c1e8 \
+    --hash=sha256:ce4bcc037df4fc5e3d184794f27bdaab018943698f4ca31630bc7f84a7b69c6d \
+    --hash=sha256:cec7d9412a9102bdc577382c3929b337320c4c4c4849f2c5cdd14d7368c5562d \
+    --hash=sha256:d400bfb9a37b1351253cb402671cea7e89bdecc294e8016a707f6d1d8ac934f9 \
+    --hash=sha256:d61f4695e6c866a23a21acab0509af1cdfd2c013cf256bbf5b6b5e2695827162 \
+    --hash=sha256:db0fbb9c62743ce59a9ff687eb5f4afbe77e5e8403d6697f7446e5f609976f76 \
+    --hash=sha256:dd86c085fae2efd48ac91dd7ccffcfc0571387fe1193d33b6394db7ef31fe2a4 \
+    --hash=sha256:e00b098126fd45523dd056d2efba6c5a63b71ffe9f2bbe1a4fe1716e1d0c331e \
+    --hash=sha256:e229a521186c75c8ad9490854fd8bbdd9a0c9aa3a524326b55be83b54d4e0ad9 \
+    --hash=sha256:e263d77ee3dd201c3a142934a086a4450861778baaeeb45db4591ef65550b0a6 \
+    --hash=sha256:ed9cb427ba5504c1dc15ede7d516b84757c3e3d7868ccc85121d9310d27eed0b \
+    --hash=sha256:fa6693661a4c91757f4412306191b6dc88c1703f780c8234035eac011922bc01 \
+    --hash=sha256:fcd131dd944808b5bdb38e6f5b53013c5aa4f334c5cad0c72742f6eba4b73db0
+    # via cryptography
+cryptography==41.0.1 \
+    --hash=sha256:059e348f9a3c1950937e1b5d7ba1f8e968508ab181e75fc32b879452f08356db \
+    --hash=sha256:1a5472d40c8f8e91ff7a3d8ac6dfa363d8e3138b961529c996f3e2df0c7a411a \
+    --hash=sha256:1a8e6c2de6fbbcc5e14fd27fb24414507cb3333198ea9ab1258d916f00bc3039 \
+    --hash=sha256:1fee5aacc7367487b4e22484d3c7e547992ed726d14864ee33c0176ae43b0d7c \
+    --hash=sha256:5d092fdfedaec4cbbffbf98cddc915ba145313a6fdaab83c6e67f4e6c218e6f3 \
+    --hash=sha256:5f0ff6e18d13a3de56f609dd1fd11470918f770c6bd5d00d632076c727d35485 \
+    --hash=sha256:7bfc55a5eae8b86a287747053140ba221afc65eb06207bedf6e019b8934b477c \
+    --hash=sha256:7fa01527046ca5facdf973eef2535a27fec4cb651e4daec4d043ef63f6ecd4ca \
+    --hash=sha256:8dde71c4169ec5ccc1087bb7521d54251c016f126f922ab2dfe6649170a3b8c5 \
+    --hash=sha256:8f4ab7021127a9b4323537300a2acfb450124b2def3756f64dc3a3d2160ee4b5 \
+    --hash=sha256:948224d76c4b6457349d47c0c98657557f429b4e93057cf5a2f71d603e2fc3a3 \
+    --hash=sha256:9a6c7a3c87d595608a39980ebaa04d5a37f94024c9f24eb7d10262b92f739ddb \
+    --hash=sha256:b46e37db3cc267b4dea1f56da7346c9727e1209aa98487179ee8ebed09d21e43 \
+    --hash=sha256:b4ceb5324b998ce2003bc17d519080b4ec8d5b7b70794cbd2836101406a9be31 \
+    --hash=sha256:cb33ccf15e89f7ed89b235cff9d49e2e62c6c981a6061c9c8bb47ed7951190bc \
+    --hash=sha256:d198820aba55660b4d74f7b5fd1f17db3aa5eb3e6893b0a41b75e84e4f9e0e4b \
+    --hash=sha256:d34579085401d3f49762d2f7d6634d6b6c2ae1242202e860f4d26b046e3a1006 \
+    --hash=sha256:eb8163f5e549a22888c18b0d53d6bb62a20510060a22fd5a995ec8a05268df8a \
+    --hash=sha256:f73bff05db2a3e5974a6fd248af2566134d8981fd7ab012e5dd4ddb1d9a70699
+    # via pypkg1 (pyproject.toml)
+pycparser==2.21 \
+    --hash=sha256:8ee45429555515e1f6b185e78100aea234072576aa43ab53aefcae078162fca9 \
+    --hash=sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206
+    # via cffi
+ruff==0.0.275 \
+    --hash=sha256:0c4e6468da26f77b90cae35319d310999f471a8c352998e9b39937a23750149e \
+    --hash=sha256:0dbdea02942131dbc15dd45f431d152224f15e1dd1859fcd0c0487b658f60f1a \
+    --hash=sha256:1cc599022fe5ffb143a965b8d659eb64161ab8ab4433d208777eab018a1aab67 \
+    --hash=sha256:22efd9f41af27ef8fb9779462c46c35c89134d33e326c889971e10b2eaf50c63 \
+    --hash=sha256:2c09662112cfa22d7467a19252a546291fd0eae4f423e52b75a7a2000a1894db \
+    --hash=sha256:508b13f7ca37274cceaba4fb3ea5da6ca192356323d92acf39462337c33ad14e \
+    --hash=sha256:5206fc1cd8c1c1deadd2e6360c0dbcd690f1c845da588ca9d32e4a764a402c60 \
+    --hash=sha256:5859ee543b01b7eb67835dfd505faa8bb7cc1550f0295c92c1401b45b42be399 \
+    --hash=sha256:5e6554a072e7ce81eb6f0bec1cebd3dcb0e358652c0f4900d7d630d61691e914 \
+    --hash=sha256:6afb1c4422f24f361e877937e2a44b3f8176774a476f5e33845ebfe887dd5ec2 \
+    --hash=sha256:80043726662144876a381efaab88841c88e8df8baa69559f96b22d4fa216bef1 \
+    --hash=sha256:8347fc16aa185aae275906c4ac5b770e00c896b6a0acd5ba521f158801911998 \
+    --hash=sha256:a19ce3bea71023eee5f0f089dde4a4272d088d5ac0b675867e074983238ccc65 \
+    --hash=sha256:a63a0b645da699ae5c758fce19188e901b3033ec54d862d93fcd042addf7f38d \
+    --hash=sha256:c8ace4d40a57b5ea3c16555f25a6b16bc5d8b2779ae1912ce2633543d4e9b1da \
+    --hash=sha256:d9b264d78621bf7b698b6755d4913ab52c19bd28bee1a16001f954d64c1a1220 \
+    --hash=sha256:ec43658c64bfda44fd84bbea9da8c7a3b34f65448192d1c4dd63e9f4e7abfdd4
+    # via pypkg1 (pyproject.toml)