typechecking poetry.utils.env

cd4247f4 · David Hotham · Bjorn Neergaard · 59a9fd3f · cd4247f4 · cd4247f4
Commit cd4247f4 authored May 21, 2022 by David Hotham Committed by Bjorn Neergaard May 22, 2022
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pyproject.toml
+1 -12

src/poetry/utils/env.py
+129 -88

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--- a/pyproject.toml
+++ b/pyproject.toml
@@ -115,18 +115,6 @@ enable_error_code = [
    "truthy-bool",
 ]
-# The following whitelist is used to allow for incremental adoption
-# of Mypy. Modules should be removed from this whitelist as and when
-# their respective type errors have been addressed. No new modules
-# should be added to this whitelist.
-# see https://github.com/python-poetry/poetry/pull/4510.
-[[tool.mypy.overrides]]
-module = [
-  'poetry.utils.env',
-]
-ignore_errors = true
 # use of importlib-metadata backport at python3.7 makes it impossible to
 # satisfy mypy without some ignores: but we get a different set of ignores at
 # different python versions.
@@ -152,6 +140,7 @@ module = [
  'poetry.core.*',
  'requests_toolbelt.*',
  'shellingham.*',
+  'virtualenv.*',
 ]
 ignore_missing_imports = true

--- a/src/poetry/utils/env.py
+++ b/src/poetry/utils/env.py
@@ -18,7 +18,6 @@ from pathlib import Path
 from subprocess import CalledProcessError
 from typing import TYPE_CHECKING
 from typing import Any
-from typing import TypeVar
 import packaging.tags
 import tomlkit
@@ -29,7 +28,6 @@ from packaging.tags import Tag
 from packaging.tags import interpreter_name
 from packaging.tags import interpreter_version
 from packaging.tags import sys_tags
-from poetry.core.poetry import Poetry
 from poetry.core.semver.helpers import parse_constraint
 from poetry.core.semver.version import Version
 from poetry.core.toml.file import TOMLFile
@@ -51,10 +49,11 @@ if TYPE_CHECKING:
    from collections.abc import Iterator
    from cleo.io.io import IO
+    from poetry.core.poetry import Poetry as CorePoetry
    from poetry.core.version.markers import BaseMarker
+    from virtualenv.seed.wheels.util import Wheel
+    from poetry.poetry import Poetry
-P = TypeVar("P", bound=Poetry)
 GET_SYS_TAGS = f"""
@@ -226,7 +225,7 @@ class SitePackages:
        self,
        purelib: Path,
        platlib: Path | None = None,
-        fallbacks: list[Path] = None,
+        fallbacks: list[Path] | None = None,
        skip_write_checks: bool = False,
    ) -> None:
        self._purelib = purelib
@@ -302,7 +301,7 @@ class SitePackages:
    def distributions(
        self, name: str | None = None, writable_only: bool = False
-    ) -> Iterable[metadata.PathDistribution]:
+    ) -> Iterable[metadata.Distribution]:
        path = list(
            map(
                str, self._candidates if not writable_only else self.writable_candidates
@@ -313,7 +312,7 @@ class SitePackages:
    def find_distribution(
        self, name: str, writable_only: bool = False
-    ) -> metadata.PathDistribution | None:
+    ) -> metadata.Distribution | None:
        for distribution in self.distributions(name=name, writable_only=writable_only):
            return distribution
        return None
@@ -324,6 +323,7 @@ class SitePackages:
        for distribution in self.distributions(
            name=distribution_name, writable_only=writable_only
        ):
+            assert distribution.files is not None
            for file in distribution.files:
                if file.name.endswith(suffix):
                    yield Path(distribution.locate_file(file))
@@ -334,6 +334,7 @@ class SitePackages:
        for distribution in self.distributions(
            name=distribution_name, writable_only=writable_only
        ):
+            assert distribution.files is not None
            for file in distribution.files:
                if file.name == name:
                    yield Path(distribution.locate_file(file))
@@ -362,16 +363,18 @@ class SitePackages:
        for distribution in self.distributions(
            name=distribution_name, writable_only=True
        ):
+            assert distribution.files is not None
            for file in distribution.files:
-                file = Path(distribution.locate_file(file))
+                path = Path(distribution.locate_file(file))
                # We can't use unlink(missing_ok=True) because it's not always available
-                if file.exists():
+                if path.exists():
-                    file.unlink()
+                    path.unlink()
-            if distribution._path.exists():
+            distribution_path: Path = distribution._path  # type: ignore[attr-defined]
-                remove_directory(str(distribution._path), force=True)
+            if distribution_path.exists():
+                remove_directory(str(distribution_path), force=True)
-            paths.append(distribution._path)
+            paths.append(distribution_path)
        return paths
@@ -409,10 +412,14 @@ class SitePackages:
        raise OSError(f"Unable to access any of {paths_csv(candidates)}")
    def write_text(self, path: str | Path, *args: Any, **kwargs: Any) -> Path:
-        return self._path_method_wrapper(path, "write_text", *args, **kwargs)[0]
+        paths = self._path_method_wrapper(path, "write_text", *args, **kwargs)
+        assert isinstance(paths, tuple)
+        return paths[0]
    def mkdir(self, path: str | Path, *args: Any, **kwargs: Any) -> Path:
-        return self._path_method_wrapper(path, "mkdir", *args, **kwargs)[0]
+        paths = self._path_method_wrapper(path, "mkdir", *args, **kwargs)
+        assert isinstance(paths, tuple)
+        return paths[0]
    def exists(self, path: str | Path) -> bool:
        return any(
@@ -498,7 +505,7 @@ class EnvManager:
    ENVS_FILE = "envs.toml"
-    def __init__(self, poetry: P) -> None:
+    def __init__(self, poetry: Poetry) -> None:
        self._poetry = poetry
    def _full_python_path(self, python: str) -> str:
@@ -516,7 +523,7 @@ class EnvManager:
        return executable
-    def _detect_active_python(self, io: IO) -> str:
+    def _detect_active_python(self, io: IO) -> str | None:
        executable = None
        try:
@@ -558,7 +565,7 @@ class EnvManager:
        python = self._full_python_path(python)
        try:
-            python_version = decode(
+            python_version_string = decode(
                subprocess.check_output(
                    list_to_shell_command([python, "-c", GET_PYTHON_VERSION_ONELINER]),
                    shell=True,
@@ -567,7 +574,7 @@ class EnvManager:
        except CalledProcessError as e:
            raise EnvCommandError(e)
-        python_version = Version.parse(python_version.strip())
+        python_version = Version.parse(python_version_string.strip())
        minor = f"{python_version.major}.{python_version.minor}"
        patch = python_version.text
@@ -649,7 +656,7 @@ class EnvManager:
                envs_file.write(envs)
-    def get(self, reload: bool = False) -> VirtualEnv | SystemEnv:
+    def get(self, reload: bool = False) -> Env:
        if self._env is not None and not reload:
            return self._env
@@ -798,7 +805,7 @@ class EnvManager:
            pass
        try:
-            python_version = decode(
+            python_version_string = decode(
                subprocess.check_output(
                    list_to_shell_command([python, "-c", GET_PYTHON_VERSION_ONELINER]),
                    shell=True,
@@ -807,13 +814,13 @@ class EnvManager:
        except CalledProcessError as e:
            raise EnvCommandError(e)
-        python_version = Version.parse(python_version.strip())
+        python_version = Version.parse(python_version_string.strip())
        minor = f"{python_version.major}.{python_version.minor}"
        name = f"{base_env_name}-py{minor}"
-        venv = venv_path / name
+        venv_path = venv_path / name
-        if not venv.exists():
+        if not venv_path.exists():
            raise ValueError(f'<warning>Environment "{name}" does not exist.</warning>')
        if envs_file.exists():
@@ -826,9 +833,9 @@ class EnvManager:
                    del envs[base_env_name]
                    envs_file.write(envs)
-        self.remove_venv(venv)
+        self.remove_venv(venv_path)
-        return VirtualEnv(venv, venv)
+        return VirtualEnv(venv_path, venv_path)
    def create_venv(
        self,
@@ -836,7 +843,7 @@ class EnvManager:
        name: str | None = None,
        executable: str | None = None,
        force: bool = False,
-    ) -> SystemEnv | VirtualEnv:
+    ) -> Env:
        if self._env is not None and not force:
            return self._env
@@ -1019,7 +1026,7 @@ class EnvManager:
        cls,
        path: Path | str,
        executable: str | Path | None = None,
-        flags: dict[str, bool] = None,
+        flags: dict[str, bool] | None = None,
        with_pip: bool | None = None,
        with_wheel: bool | None = None,
        with_setuptools: bool | None = None,
@@ -1086,7 +1093,7 @@ class EnvManager:
                remove_directory(file_path, force=True)
    @classmethod
-    def get_system_env(cls, naive: bool = False) -> SystemEnv | GenericEnv:
+    def get_system_env(cls, naive: bool = False) -> Env:
        """
        Retrieve the current Python environment.
@@ -1100,7 +1107,7 @@ class EnvManager:
        (e.g. plugin installation or self update).
        """
        prefix, base_prefix = Path(sys.prefix), Path(cls.get_base_prefix())
-        env = SystemEnv(prefix)
+        env: Env = SystemEnv(prefix)
        if not naive:
            if prefix.joinpath("poetry_env").exists():
                env = GenericEnv(base_prefix, child_env=env)
@@ -1118,11 +1125,13 @@ class EnvManager:
    @classmethod
    def get_base_prefix(cls) -> Path:
-        if hasattr(sys, "real_prefix"):
+        real_prefix = getattr(sys, "real_prefix", None)
-            return Path(sys.real_prefix)
+        if real_prefix is not None:
+            return Path(real_prefix)
-        if hasattr(sys, "base_prefix"):
+        base_prefix = getattr(sys, "base_prefix", None)
-            return Path(sys.base_prefix)
+        if base_prefix is not None:
+            return Path(base_prefix)
        return Path(sys.prefix)
@@ -1131,10 +1140,10 @@ class EnvManager:
        name = name.lower()
        sanitized_name = re.sub(r'[ $`!*@"\\\r\n\t]', "_", name)[:42]
        normalized_cwd = os.path.normcase(cwd)
-        h = hashlib.sha256(encode(normalized_cwd)).digest()
+        h_bytes = hashlib.sha256(encode(normalized_cwd)).digest()
-        h = base64.urlsafe_b64encode(h).decode()[:8]
+        h_str = base64.urlsafe_b64encode(h_bytes).decode()[:8]
-        return f"{sanitized_name}-{h}"
+        return f"{sanitized_name}-{h_str}"
 class Env:
@@ -1161,16 +1170,16 @@ class Env:
        self._base = base or path
-        self._marker_env = None
+        self._marker_env: dict[str, Any] | None = None
-        self._pip_version = None
+        self._pip_version: Version | None = None
-        self._site_packages = None
+        self._site_packages: SitePackages | None = None
-        self._paths = None
+        self._paths: dict[str, str] | None = None
-        self._supported_tags = None
+        self._supported_tags: list[Tag] | None = None
-        self._purelib = None
+        self._purelib: Path | None = None
-        self._platlib = None
+        self._platlib: Path | None = None
-        self._script_dirs = None
+        self._script_dirs: list[Path] | None = None
-        self._embedded_pip_path = None
+        self._embedded_pip_path: str | None = None
    @property
    def path(self) -> Path:
@@ -1181,12 +1190,13 @@ class Env:
        return self._base
    @property
-    def version_info(self) -> tuple[int]:
+    def version_info(self) -> tuple[Any, ...]:
        return tuple(self.marker_env["version_info"])
    @property
    def python_implementation(self) -> str:
-        return self.marker_env["platform_python_implementation"]
+        implementation: str = self.marker_env["platform_python_implementation"]
+        return implementation
    @property
    def python(self) -> str:
@@ -1242,9 +1252,11 @@ class Env:
        self._find_pip_executable()
    def get_embedded_wheel(self, distribution: str) -> Path:
-        return get_embed_wheel(
+        wheel: Wheel = get_embed_wheel(
            distribution, f"{self.version_info[0]}.{self.version_info[1]}"
-        ).path
+        )
+        path: Path = wheel.path
+        return path
    @property
    def pip_embedded(self) -> str:
@@ -1351,15 +1363,17 @@ class Env:
    @classmethod
    def get_base_prefix(cls) -> Path:
-        if hasattr(sys, "real_prefix"):
+        real_prefix = getattr(sys, "real_prefix", None)
-            return Path(sys.real_prefix)
+        if real_prefix is not None:
+            return Path(real_prefix)
-        if hasattr(sys, "base_prefix"):
+        base_prefix = getattr(sys, "base_prefix", None)
-            return Path(sys.base_prefix)
+        if base_prefix is not None:
+            return Path(base_prefix)
        return Path(sys.prefix)
-    def get_version_info(self) -> tuple[int]:
+    def get_version_info(self) -> tuple[Any, ...]:
        raise NotImplementedError()
    def get_python_implementation(self) -> str:
@@ -1421,12 +1435,15 @@ class Env:
            if self._is_windows:
                kwargs["shell"] = True
+            command: str | list[str]
            if kwargs.get("shell", False):
-                cmd = list_to_shell_command(cmd)
+                command = list_to_shell_command(cmd)
+            else:
+                command = cmd
            if input_:
                output = subprocess.run(
-                    cmd,
+                    command,
                    stdout=subprocess.PIPE,
                    stderr=subprocess.STDOUT,
                    input=encode(input_),
@@ -1434,10 +1451,12 @@ class Env:
                    **kwargs,
                ).stdout
            elif call:
-                return subprocess.call(cmd, stderr=subprocess.STDOUT, env=env, **kwargs)
+                return subprocess.call(
+                    command, stderr=subprocess.STDOUT, env=env, **kwargs
+                )
            else:
                output = subprocess.check_output(
-                    cmd, stderr=subprocess.STDOUT, env=env, **kwargs
+                    command, stderr=subprocess.STDOUT, env=env, **kwargs
                )
        except CalledProcessError as e:
            raise EnvCommandError(e, input=input_)
@@ -1461,11 +1480,10 @@ class Env:
    @property
    def script_dirs(self) -> list[Path]:
        if self._script_dirs is None:
-            self._script_dirs = (
+            scripts = self.paths.get("scripts")
-                [Path(self.paths["scripts"])]
+            self._script_dirs = [
-                if "scripts" in self.paths
+                Path(scripts) if scripts is not None else self._bin_dir
-                else self._bin_dir
+            ]
-            )
            if self.userbase:
                self._script_dirs.append(self.userbase / self._script_dirs[0].name)
        return self._script_dirs
@@ -1498,6 +1516,9 @@ class Env:
        return str(bin_path)
    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Env):
+            return False
        return other.__class__ == self.__class__ and other.path == self.path
    def __repr__(self) -> str:
@@ -1517,8 +1538,8 @@ class SystemEnv(Env):
    def sys_path(self) -> list[str]:
        return sys.path
-    def get_version_info(self) -> tuple[int]:
+    def get_version_info(self) -> tuple[Any, ...]:
-        return sys.version_info
+        return tuple(sys.version_info)
    def get_python_implementation(self) -> str:
        return platform.python_implementation()
@@ -1543,6 +1564,7 @@ class SystemEnv(Env):
        with warnings.catch_warnings():
            warnings.filterwarnings("ignore", "setup.py install is deprecated")
            obj = d.get_command_obj("install", create=True)
+        assert obj is not None
        obj.finalize_options()
        paths = sysconfig.get_paths().copy()
@@ -1553,9 +1575,12 @@ class SystemEnv(Env):
            paths[key] = getattr(obj, f"install_{key}")
-        if site.check_enableusersite() and hasattr(obj, "install_usersite"):
+        if site.check_enableusersite():
-            paths["usersite"] = obj.install_usersite
+            usersite = getattr(obj, "install_usersite", None)
-            paths["userbase"] = obj.install_userbase
+            userbase = getattr(obj, "install_userbase", None)
+            if usersite is not None and userbase is not None:
+                paths["usersite"] = usersite
+                paths["userbase"] = userbase
        return paths
@@ -1614,20 +1639,26 @@ class VirtualEnv(Env):
        # In this case we need to get sys.base_prefix
        # from inside the virtualenv.
        if base is None:
-            self._base = Path(self.run_python_script(GET_BASE_PREFIX).strip())
+            output = self.run_python_script(GET_BASE_PREFIX)
+            assert isinstance(output, str)
+            self._base = Path(output.strip())
    @property
    def sys_path(self) -> list[str]:
        output = self.run_python_script(GET_SYS_PATH)
-        return json.loads(output)
+        assert isinstance(output, str)
+        paths: list[str] = json.loads(output)
+        return paths
-    def get_version_info(self) -> tuple[int]:
+    def get_version_info(self) -> tuple[Any, ...]:
        output = self.run_python_script(GET_PYTHON_VERSION)
+        assert isinstance(output, str)
        return tuple(int(s) for s in output.strip().split("."))
    def get_python_implementation(self) -> str:
-        return self.marker_env["platform_python_implementation"]
+        implementation: str = self.marker_env["platform_python_implementation"]
+        return implementation
    def get_pip_command(self, embedded: bool = False) -> list[str]:
        # We're in a virtualenv that is known to be sane,
@@ -1639,16 +1670,22 @@ class VirtualEnv(Env):
    def get_supported_tags(self) -> list[Tag]:
        output = self.run_python_script(GET_SYS_TAGS)
+        assert isinstance(output, str)
        return [Tag(*t) for t in json.loads(output)]
    def get_marker_env(self) -> dict[str, Any]:
        output = self.run_python_script(GET_ENVIRONMENT_INFO)
+        assert isinstance(output, str)
-        return json.loads(output)
+        env: dict[str, Any] = json.loads(output)
+        return env
    def get_pip_version(self) -> Version:
-        output = self.run_pip("--version").strip()
+        output = self.run_pip("--version")
+        assert isinstance(output, str)
+        output = output.strip()
        m = re.match("pip (.+?)(?: from .+)?$", output)
        if not m:
            return Version.parse("0.0")
@@ -1657,7 +1694,9 @@ class VirtualEnv(Env):
    def get_paths(self) -> dict[str, str]:
        output = self.run_python_script(GET_PATHS)
-        return json.loads(output)
+        assert isinstance(output, str)
+        paths: dict[str, str] = json.loads(output)
+        return paths
    def is_venv(self) -> bool:
        return True
@@ -1666,7 +1705,7 @@ class VirtualEnv(Env):
        # A virtualenv is considered sane if "python" exists.
        return os.path.exists(self.python)
-    def _run(self, cmd: list[str], **kwargs: Any) -> int | None:
+    def _run(self, cmd: list[str], **kwargs: Any) -> int | str:
        kwargs["env"] = self.get_temp_environ(environ=kwargs.get("env"))
        return super()._run(cmd, **kwargs)
@@ -1771,8 +1810,10 @@ class GenericEnv(VirtualEnv):
    def get_paths(self) -> dict[str, str]:
        output = self.run_python_script(GET_PATHS_FOR_GENERIC_ENVS)
+        assert isinstance(output, str)
-        return json.loads(output)
+        paths: dict[str, str] = json.loads(output)
+        return paths
    def execute(self, bin: str, *args: str, **kwargs: Any) -> int | None:
        command = self.get_command_from_bin(bin) + list(args)
@@ -1786,7 +1827,7 @@ class GenericEnv(VirtualEnv):
        return exe.returncode
-    def _run(self, cmd: list[str], **kwargs: Any) -> int | None:
+    def _run(self, cmd: list[str], **kwargs: Any) -> int | str:
        return super(VirtualEnv, self)._run(cmd, **kwargs)
    def is_venv(self) -> bool:
@@ -1795,7 +1836,7 @@ class GenericEnv(VirtualEnv):
 class NullEnv(SystemEnv):
    def __init__(
-        self, path: Path = None, base: Path | None = None, execute: bool = False
+        self, path: Path | None = None, base: Path | None = None, execute: bool = False
    ) -> None:
        if path is None:
            path = Path(sys.prefix)
@@ -1803,7 +1844,7 @@ class NullEnv(SystemEnv):
        super().__init__(path, base=base)
        self._execute = execute
-        self.executed = []
+        self.executed: list[list[str]] = []
    def get_pip_command(self, embedded: bool = False) -> list[str]:
        return [
@@ -1811,12 +1852,12 @@ class NullEnv(SystemEnv):
            self.pip_embedded if embedded else self.pip,
        ]
-    def _run(self, cmd: list[str], **kwargs: Any) -> int | None:
+    def _run(self, cmd: list[str], **kwargs: Any) -> int | str:
        self.executed.append(cmd)
        if self._execute:
            return super()._run(cmd, **kwargs)
-        return None
+        return 0
    def execute(self, bin: str, *args: str, **kwargs: Any) -> int | None:
        self.executed.append([bin] + list(args))
@@ -1832,7 +1873,7 @@ class NullEnv(SystemEnv):
 @contextmanager
 def ephemeral_environment(
    executable: str | Path | None = None,
-    flags: dict[str, bool] = None,
+    flags: dict[str, bool] | None = None,
 ) -> Iterator[VirtualEnv]:
    with temporary_directory() as tmp_dir:
        # TODO: cache PEP 517 build environment corresponding to each project venv
@@ -1847,7 +1888,7 @@ def ephemeral_environment(
 @contextmanager
 def build_environment(
-    poetry: P, env: Env | None = None, io: IO | None = None
+    poetry: CorePoetry, env: Env | None = None, io: IO | None = None
 ) -> Iterator[Env]:
    """
    If a build script is specified for the project, there could be additional build
@@ -1897,8 +1938,8 @@ class MockEnv(NullEnv):
        is_venv: bool = False,
        pip_version: str = "19.1",
        sys_path: list[str] | None = None,
-        marker_env: dict[str, Any] = None,
+        marker_env: dict[str, Any] | None = None,
-        supported_tags: list[Tag] = None,
+        supported_tags: list[Tag] | None = None,
        **kwargs: Any,
    ) -> None:
        super().__init__(**kwargs)
@@ -1908,7 +1949,7 @@ class MockEnv(NullEnv):
        self._platform = platform
        self._os_name = os_name
        self._is_venv = is_venv
-        self._pip_version = Version.parse(pip_version)
+        self._pip_version: Version = Version.parse(pip_version)
        self._sys_path = sys_path
        self._mock_marker_env = marker_env
        self._supported_tags = supported_tags