mk-poetry-dep.nix

{ autoPatchelfHook
, pkgs
, lib
, python
, buildPythonPackage
, pythonPackages
, poetryLib
}:
{ name
, version
, files
, source
, dependencies ? {}
, pythonPackages
, python-versions
, pwd
, supportedExtensions ? lib.importJSON ./extensions.json
, ...
}:

pythonPackages.callPackage (
  { preferWheel ? false
  , ...
  }@args:

    let

      inherit (poetryLib) isCompatible getManyLinuxDeps fetchFromPypi;

      inherit (import ./pep425.nix {
        inherit lib python;
        inherit (pkgs) stdenv;
      }) selectWheel
        ;

      fileCandidates = let
        supportedRegex = ("^.*?(" + builtins.concatStringsSep "|" supportedExtensions + ")");
        matchesVersion = fname: builtins.match ("^.*" + builtins.replaceStrings [ "." ] [ "\\." ] version + ".*$") fname != null;
        hasSupportedExtension = fname: builtins.match supportedRegex fname != null;
        isCompatibleEgg = fname: ! lib.strings.hasSuffix ".egg" fname || lib.strings.hasSuffix "py${python.pythonVersion}.egg" fname;
      in
        builtins.filter (f: matchesVersion f.file && hasSupportedExtension f.file && isCompatibleEgg f.file) files;

      toPath = s: pwd + "/${s}";

      isSource = source != null;
      isGit = isSource && source.type == "git";
      isLocal = isSource && source.type == "directory";

      localDepPath = toPath source.url;
      pyProject = poetryLib.readTOML (localDepPath + "/pyproject.toml");

      buildSystemPkgs = poetryLib.getBuildSystemPkgs {
        inherit pythonPackages pyProject;
      };

      fileInfo = let
        isBdist = f: lib.strings.hasSuffix "whl" f.file;
        isSdist = f: ! isBdist f && ! isEgg f;
        isEgg = f: lib.strings.hasSuffix ".egg" f.file;

        binaryDist = selectWheel fileCandidates;
        sourceDist = builtins.filter isSdist fileCandidates;
        eggs = builtins.filter isEgg fileCandidates;

        entries = (if preferWheel then binaryDist ++ sourceDist else sourceDist ++ binaryDist) ++ eggs;

        lockFileEntry = builtins.head entries;

        _isEgg = isEgg lockFileEntry;

      in
        rec {
          inherit (lockFileEntry) file hash;
          name = file;
          format =
            if _isEgg then "egg"
            else if lib.strings.hasSuffix ".whl" name then "wheel"
            else "setuptools";
          kind =
            if _isEgg then python.pythonVersion
            else if format == "setuptools" then "source"
            else (builtins.elemAt (lib.strings.splitString "-" name) 2);
        };

      # Prevent infinite recursion
      skipSetupToolsSCM = [
        "setuptools_scm"
        "setuptools-scm"
        "toml" # Toml is an extra for setuptools-scm
      ];
      baseBuildInputs = lib.optional (! lib.elem name skipSetupToolsSCM) pythonPackages.setuptools-scm;

      format = if isLocal then "pyproject" else if isGit then "setuptools" else fileInfo.format;

    in

      buildPythonPackage {
        pname = name;
        version = version;

        inherit format;

        doCheck = false; # We never get development deps

        # Stripping pre-built wheels lead to `ELF load command address/offset not properly aligned`
        dontStrip = format == "wheel";

        nativeBuildInputs = [
          pythonPackages.poetry2nixFixupHook
        ]
        ++ lib.optional (!isSource && (getManyLinuxDeps fileInfo.name).str != null) autoPatchelfHook
        ++ lib.optional (format == "pyproject") pythonPackages.removePathDependenciesHook
        ;

        buildInputs = (
          baseBuildInputs
          ++ lib.optional (!isSource) (getManyLinuxDeps fileInfo.name).pkg
          ++ lib.optional isLocal buildSystemPkgs
        );

        propagatedBuildInputs = let
          compat = isCompatible python.pythonVersion;
          deps = lib.filterAttrs (n: v: v) (
            lib.mapAttrs (
              n: v: let
                constraints = v.python or "";
              in
                compat constraints
            ) dependencies
          );
          depAttrs = lib.attrNames deps;
        in
          builtins.map (n: pythonPackages.${lib.toLower n}) depAttrs;

        meta = {
          broken = ! isCompatible python.pythonVersion python-versions;
          license = [];
          inherit (python.meta) platforms;
        };

        passthru = {
          inherit args;
        };

        # We need to retrieve kind from the interpreter and the filename of the package
        # Interpreters should declare what wheel types they're compatible with (python type + ABI)
        # Here we can then choose a file based on that info.
        src = if isGit then (
          builtins.fetchGit {
            inherit (source) url;
            rev = source.reference;
          }
        ) else if isLocal then (poetryLib.cleanPythonSources { src = localDepPath; }) else fetchFromPypi {
          pname = name;
          inherit (fileInfo) file hash kind;
        };
      }

) {}