setup.py

#!/usr/bin/env python

from __future__ import annotations

import glob
import os
import os.path
import sys
from typing import TYPE_CHECKING, Any

if sys.version_info < (3, 8, 0):
    sys.stderr.write("ERROR: You need Python 3.8 or later to use mypy.\n")
    exit(1)

# we'll import stuff from the source tree, let's ensure is on the sys path
sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)))

# This requires setuptools when building; setuptools is not needed
# when installing from a wheel file (though it is still needed for
# alternative forms of installing, as suggested by README.md).
from setuptools import Extension, find_packages, setup
from setuptools.command.build_py import build_py

from mypy.version import __version__ as version

if TYPE_CHECKING:
    from typing_extensions import TypeGuard

description = "Optional static typing for Python"
long_description = """
Mypy -- Optional Static Typing for Python
=========================================

Add type annotations to your Python programs, and use mypy to type
check them.  Mypy is essentially a Python linter on steroids, and it
can catch many programming errors by analyzing your program, without
actually having to run it.  Mypy has a powerful type system with
features such as type inference, gradual typing, generics and union
types.
""".lstrip()


def is_list_of_setuptools_extension(items: list[Any]) -> TypeGuard[list[Extension]]:
    return all(isinstance(item, Extension) for item in items)


def find_package_data(base, globs, root="mypy"):
    """Find all interesting data files, for setup(package_data=)

    Arguments:
      root:  The directory to search in.
      globs: A list of glob patterns to accept files.
    """

    rv_dirs = [root for root, dirs, files in os.walk(base)]
    rv = []
    for rv_dir in rv_dirs:
        files = []
        for pat in globs:
            files += glob.glob(os.path.join(rv_dir, pat))
        if not files:
            continue
        rv.extend([os.path.relpath(f, root) for f in files])
    return rv


class CustomPythonBuild(build_py):
    def pin_version(self):
        path = os.path.join(self.build_lib, "mypy")
        self.mkpath(path)
        with open(os.path.join(path, "version.py"), "w") as stream:
            stream.write(f'__version__ = "{version}"\n')

    def run(self):
        self.execute(self.pin_version, ())
        build_py.run(self)


cmdclass = {"build_py": CustomPythonBuild}

package_data = ["py.typed"]

package_data += find_package_data(os.path.join("mypy", "typeshed"), ["*.py", "*.pyi"])
package_data += [os.path.join("mypy", "typeshed", "stdlib", "VERSIONS")]

package_data += find_package_data(os.path.join("mypy", "xml"), ["*.xsd", "*.xslt", "*.css"])

USE_MYPYC = False
# To compile with mypyc, a mypyc checkout must be present on the PYTHONPATH
if len(sys.argv) > 1 and "--use-mypyc" in sys.argv:
    sys.argv.remove("--use-mypyc")
    USE_MYPYC = True
if os.getenv("MYPY_USE_MYPYC", None) == "1":
    USE_MYPYC = True

if USE_MYPYC:
    MYPYC_BLACKLIST = tuple(
        os.path.join("mypy", x)
        for x in (
            # Need to be runnable as scripts
            "__main__.py",
            "pyinfo.py",
            os.path.join("dmypy", "__main__.py"),
            # Uses __getattr__/__setattr__
            "split_namespace.py",
            # Lies to mypy about code reachability
            "bogus_type.py",
            # We don't populate __file__ properly at the top level or something?
            # Also I think there would be problems with how we generate version.py.
            "version.py",
            # Skip these to reduce the size of the build
            "stubtest.py",
            "stubgenc.py",
            "stubdoc.py",
            "stubutil.py",
        )
    ) + (
        # Don't want to grab this accidentally
        os.path.join("mypyc", "lib-rt", "setup.py"),
        # Uses __file__ at top level https://github.com/mypyc/mypyc/issues/700
        os.path.join("mypyc", "__main__.py"),
    )

    everything = [os.path.join("mypy", x) for x in find_package_data("mypy", ["*.py"])] + [
        os.path.join("mypyc", x) for x in find_package_data("mypyc", ["*.py"], root="mypyc")
    ]
    # Start with all the .py files
    all_real_pys = [
        x for x in everything if not x.startswith(os.path.join("mypy", "typeshed") + os.sep)
    ]
    # Strip out anything in our blacklist
    mypyc_targets = [x for x in all_real_pys if x not in MYPYC_BLACKLIST]
    # Strip out any test code
    mypyc_targets = [
        x
        for x in mypyc_targets
        if not x.startswith(
            (
                os.path.join("mypy", "test") + os.sep,
                os.path.join("mypyc", "test") + os.sep,
                os.path.join("mypyc", "doc") + os.sep,
                os.path.join("mypyc", "test-data") + os.sep,
            )
        )
    ]
    # ... and add back in the one test module we need
    mypyc_targets.append(os.path.join("mypy", "test", "visitors.py"))

    # The targets come out of file system apis in an unspecified
    # order. Sort them so that the mypyc output is deterministic.
    mypyc_targets.sort()

    use_other_mypyc = os.getenv("ALTERNATE_MYPYC_PATH", None)
    if use_other_mypyc:
        # This bit is super unfortunate: we want to use a different
        # mypy/mypyc version, but we've already imported parts, so we
        # remove the modules that we've imported already, which will
        # let the right versions be imported by mypyc.
        del sys.modules["mypy"]
        del sys.modules["mypy.version"]
        del sys.modules["mypy.git"]
        sys.path.insert(0, use_other_mypyc)

    from mypyc.build import mypycify

    opt_level = os.getenv("MYPYC_OPT_LEVEL", "3")
    debug_level = os.getenv("MYPYC_DEBUG_LEVEL", "1")
    force_multifile = os.getenv("MYPYC_MULTI_FILE", "") == "1"
    ext_modules = mypycify(
        mypyc_targets + ["--config-file=mypy_bootstrap.ini"],
        opt_level=opt_level,
        debug_level=debug_level,
        # Use multi-file compilation mode on windows because without it
        # our Appveyor builds run out of memory sometimes.
        multi_file=sys.platform == "win32" or force_multifile,
    )
    assert is_list_of_setuptools_extension(ext_modules), "Expected mypycify to use setuptools"

else:
    ext_modules = []


classifiers = [
    "Development Status :: 5 - Production/Stable",
    "Environment :: Console",
    "Intended Audience :: Developers",
    "License :: OSI Approved :: MIT License",
    "Programming Language :: Python :: 3",
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
    "Programming Language :: Python :: 3.11",
    "Topic :: Software Development",
    "Typing :: Typed",
]

setup(
    name="mypy",
    version=version,
    description=description,
    long_description=long_description,
    author="Jukka Lehtosalo",
    author_email="jukka.lehtosalo@iki.fi",
    url="https://www.mypy-lang.org/",
    license="MIT License",
    py_modules=[],
    ext_modules=ext_modules,
    packages=find_packages(),
    package_data={"mypy": package_data},
    entry_points={
        "console_scripts": [
            "mypy=mypy.__main__:console_entry",
            "stubgen=mypy.stubgen:main",
            "stubtest=mypy.stubtest:main",
            "dmypy=mypy.dmypy.client:console_entry",
            "mypyc=mypyc.__main__:main",
        ]
    },
    classifiers=classifiers,
    cmdclass=cmdclass,
    # When changing this, also update mypy-requirements.txt.
    install_requires=[
        "typing_extensions>=4.1.0",
        "mypy_extensions >= 1.0.0",
        "tomli>=1.1.0; python_version<'3.11'",
    ],
    # Same here.
    extras_require={
        "dmypy": "psutil >= 4.0",
        "python2": "",
        "reports": "lxml",
        "install-types": "pip",
    },
    python_requires=">=3.8",
    include_package_data=True,
    project_urls={
        "News": "https://mypy-lang.org/news.html",
        "Documentation": "https://mypy.readthedocs.io/en/stable/index.html",
        "Repository": "https://github.com/python/mypy",
    },
)