add support for `-f setuppy`

LICENSE

 MIT License
 
-Copyright (c) 2019-2020 Frost Ming
+Copyright (c) 2019-2021 Frost Ming
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

news/289.feature.md

+Support `-f setuppy` for `pdm export` to export the metadata as setup.py

pdm/formats/__init__.py

-from pdm.formats import flit, legacy, pipfile, poetry, requirements
+from __future__ import annotations
 
-FORMATS = {
+import os
+from typing import TYPE_CHECKING, Dict, Iterable, Protocol, Tuple
+
+from pdm.formats import flit, legacy, pipfile, poetry, requirements, setup_py
+
+if TYPE_CHECKING:
+    import argparse
+
+    from pdm.models.candidates import Candidate
+    from pdm.project import Project
+
+
+class FormatConverter(Protocol):
+    def check_fingerprint(self, project: Project, filename: os.PathLike) -> bool:
+        ...
+
+    def convert(self, project: Project, filename: os.PathLike) -> Tuple[dict, dict]:
+        ...
+
+    def export(
+        self,
+        project: Project,
+        candidates: Iterable[Candidate],
+        options: argparse.Namespace,
+    ) -> str:
+        ...
+
+
+FORMATS: Dict[str, FormatConverter] = {
     "pipfile": pipfile,
     "poetry": poetry,
     "flit": flit,
     "requirements": requirements,
     "legacy": legacy,
+    "setuppy": setup_py,
 }

pdm/formats/setup_py.py

+import os
+
+
+def check_fingerprint(project, filename):
+    return os.path.basename(filename) == "setup.py"
+
+
+def convert(project, filename):
+    raise NotImplementedError()
+
+
+def export(project, candidates, options):
+    from pdm.pep517.base import Builder
+
+    builder = Builder(project.root)
+    return builder.format_setup_py()

tests/fixtures/projects/demo-package/setup.py

+# -*- coding: utf-8 -*-
+from setuptools import setup
+
+import codecs
+
+with codecs.open("README.md", encoding="utf-8") as fp:
+    long_description = fp.read()
+INSTALL_REQUIRES = [
+    "flask",
+]
+
+setup_kwargs = {
+    "name": "demo-package",
+    "version": "0.1.0",
+    "description": "",
+    "long_description": long_description,
+    "license": "MIT",
+    "author": "",
+    "author_email": "frostming <mianghong@gmail.com>",
+    "maintainer": None,
+    "maintainer_email": None,
+    "url": "",
+    "packages": [
+        "my_package",
+    ],
+    "package_data": {"": ["*"]},
+    "long_description_content_type": "text/markdown",
+    "install_requires": INSTALL_REQUIRES,
+    "python_requires": ">=3.5",
+}
+
+
+setup(**setup_kwargs)

tests/test_formats.py

-from pdm.formats import flit, legacy, pipfile, poetry, requirements
+from pdm.formats import flit, legacy, pipfile, poetry, requirements, setup_py
+from pdm.project import Project
 from pdm.utils import cd
 from tests import FIXTURES
 
@@ -126,3 +127,9 @@ def test_convert_legacy_format(project):
     assert not result["dev-dependencies"]
     assert result["optional-dependencies"]["test"] == ["pytest"]
     assert settings["source"][0]["url"] == "https://test.pypi.org/simple"
+
+
+def test_export_setup_py():
+    project = Project(FIXTURES / "projects/demo-package")
+    content = setup_py.export(project, [], None)
+    assert content == project.root.joinpath("setup.py").read_text()