Flit Migration guide — map setup files to flit config

Flit migration map for Python packages: finds every setup.py, setup.cfg and setuptools/old-flit pyproject.toml line and prints the exact flit_core 4 [project] line that replaces it, plus the blockers Flit cannot build. Runs entirely in your browser — nothing is uploaded.

# setup.py for "tidyframe" -- the file this project still builds from
import os
from setuptools import setup, find_packages

here = os.getcwd()
with open(os.path.join(here, "README.md")) as f:
    readme = f.read()

setup(
    name="tidyframe",
    version="2.4.1",
    description="Tidy helpers for pandas frames",
    long_description=readme,
    long_description_content_type="text/markdown",
    author="Dana Example",
    author_email="dana@example.org",
    url="https://github.com/example/tidyframe",
    license="MIT",
    packages=find_packages(exclude=["tests"]),
    package_dir={"": "src"},
    include_package_data=True,
    package_data={"tidyframe": ["schemas/*.json"]},
    data_files=[("share/man/man1", ["docs/tidyframe.1"])],
    python_requires=">=3.8",
    setup_requires=["wheel"],
    install_requires=["pandas>=2.0", "click>=8"],
    extras_require={"test": ["pytest>=7"], "docs": ["sphinx"]},
    entry_points={
        "console_scripts": ["tidyframe=tidyframe.cli:main"],
        "pandas_plugins": ["tidy=tidyframe.plugin:register"],
    },
    classifiers=["License :: OSI Approved :: MIT License"],
)

as of

Free here: Check the open setup.py, setup.cfg or pyproject.toml: every setuptools or old-flit line with its line number and the exact flit_core 4 replacement line, plus the blockers Flit cannot build. In the editor: Whole workspace: one dated migration plan mapping every item in every package to its flit_core 4 replacement, and a team CI gate that fails a build adding new setuptools-only use. — that part asks for a licence key.

Same engine as the VS Code extension, byte for byte.