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{ pkgs
, lib
, poetryLib
, pyProject
, python
, editablePackageSources
}:
let
name = poetryLib.moduleName pyProject.tool.poetry.name;
# Just enough standard PKG-INFO fields for an editable installation
pkgInfoFields = {
Metadata-Version = "2.1";
Name = name;
# While the pyproject.toml could contain arbitrary version strings, for
# simplicity we just use the same one for PKG-INFO, even though that
# should follow follow PEP 440: https://www.python.org/dev/peps/pep-0345/#version
# This is how poetry transforms it: https://github.com/python-poetry/poetry/blob/6cd3645d889f47c10425961661b8193b23f0ed79/poetry/version/version.py
Version = pyProject.tool.poetry.version;
Summary = pyProject.tool.poetry.description;
};
pkgInfoFile = builtins.toFile "${name}-PKG-INFO"
(lib.concatStringsSep "\n" (lib.mapAttrsToList (key: value: "${key}: ${value}") pkgInfoFields));
entryPointsFile = builtins.toFile "${name}-entry_points.txt"
(lib.generators.toINI { } pyProject.tool.poetry.plugins);
# A python package that contains simple .egg-info and .pth files for an editable installation
editablePackage = python.pkgs.toPythonModule (pkgs.runCommandNoCC "${name}-editable"
{ } ''
mkdir -p "$out/${python.sitePackages}"
cd "$out/${python.sitePackages}"
# See https://docs.python.org/3.8/library/site.html for info on such .pth files
# These add another site package path for each line
touch poetry2nix-editable.pth
${lib.concatMapStringsSep "\n" (src: ''
echo "${toString src}" >> poetry2nix-editable.pth
'')
(lib.attrValues editablePackageSources)}
# Create a very simple egg so pkg_resources can find this package
# See https://setuptools.readthedocs.io/en/latest/formats.html for more info on the egg format
mkdir "${name}.egg-info"
cd "${name}.egg-info"
ln -s ${pkgInfoFile} PKG-INFO
${lib.optionalString (pyProject.tool.poetry ? plugins) ''
ln -s ${entryPointsFile} entry_points.txt
''}
''
);
in
editablePackage
|