Fix encoding warnings with PEP 597 enabled

.github/workflows/.tests-matrix.yaml

@@ -22,6 +22,9 @@ defaults:
   run:
     shell: bash
 
+env:
+  PYTHONWARNDEFAULTENCODING: 'true'
+
 jobs:
   mypy:
     name: mypy

src/poetry/masonry/builders/editable.py

@@ -3,7 +3,6 @@
 import csv
 import hashlib
 import json
-import locale
 import os
 
 from base64 import urlsafe_b64encode
@@ -16,6 +15,7 @@
 
 from poetry.utils._compat import WINDOWS
 from poetry.utils._compat import decode
+from poetry.utils._compat import getencoding
 from poetry.utils.env import build_environment
 from poetry.utils.helpers import is_dir_writable
 from poetry.utils.pip import pip_install
@@ -125,7 +125,7 @@ def _add_pth(self) -> list[Path]:
 
         try:
             pth_file = self._env.site_packages.write_text(
-                pth_file, content, encoding=locale.getpreferredencoding()
+                pth_file, content, encoding=getencoding()
             )
             self._debug(
                 f"  - Adding <c2>{pth_file.name}</c2> to <b>{pth_file.parent}</b> for"
@@ -252,7 +252,8 @@ def _add_dist_info(self, added_files: list[Path]) -> None:
                     "dir_info": {"editable": True},
                     "url": self._poetry.file.path.parent.absolute().as_uri(),
                 }
-            )
+            ),
+            encoding="utf-8",
         )
         added_files.append(direct_url_json)
 

src/poetry/repositories/installed_repository.py

@@ -13,6 +13,7 @@
 from poetry.core.utils.helpers import module_name
 
 from poetry.repositories.repository import Repository
+from poetry.utils._compat import getencoding
 from poetry.utils._compat import metadata
 
 
@@ -58,7 +59,7 @@ def get_package_paths(cls, env: Env, name: str) -> set[Path]:
             if not pth_file.exists():
                 continue
 
-            with pth_file.open() as f:
+            with pth_file.open(encoding=getencoding()) as f:
                 for line in f:
                     line = line.strip()
                     if line and not line.startswith(("#", "import ", "import\t")):

src/poetry/utils/_compat.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import locale
 import sys
 
 from contextlib import suppress
@@ -52,6 +53,13 @@ def encode(string: str, encodings: list[str] | None = None) -> bytes:
     return string.encode(encodings[0], errors="ignore")
 
 
+def getencoding() -> str:
+    if sys.version_info < (3, 11):
+        return locale.getpreferredencoding()
+    else:
+        return locale.getencoding()
+
+
 def is_relative_to(this: Path, other: Path) -> bool:
     """
     Return whether `this` path is relative to the `other` path. This is compatibility wrapper around
@@ -72,6 +80,7 @@ def is_relative_to(this: Path, other: Path) -> bool:
     "WINDOWS",
     "decode",
     "encode",
+    "getencoding",
     "is_relative_to",
     "metadata",
     "tomllib",

src/poetry/utils/env/base_env.py

@@ -330,8 +330,9 @@ def _run(self, cmd: list[str], **kwargs: Any) -> str:
                 subprocess.check_call(cmd, stderr=stderr, env=env, **kwargs)
                 output = ""
             else:
+                encoding = "locale" if sys.version_info >= (3, 10) else None
                 output = subprocess.check_output(
-                    cmd, stderr=stderr, env=env, text=True, **kwargs
+                    cmd, stderr=stderr, env=env, text=True, encoding=encoding, **kwargs
                 )
         except CalledProcessError as e:
             raise EnvCommandError(e)

src/poetry/utils/env/env_manager.py

@@ -105,8 +105,11 @@ def _full_python_path(python: str) -> Path | None:
             return None
 
         try:
+            encoding = "locale" if sys.version_info >= (3, 10) else None
             executable = subprocess.check_output(
-                [path_python, "-c", "import sys; print(sys.executable)"], text=True
+                [path_python, "-c", "import sys; print(sys.executable)"],
+                text=True,
+                encoding=encoding,
             ).strip()
             return Path(executable)
 
@@ -147,8 +150,11 @@ def get_python_version(
             executable = EnvManager._detect_active_python(io)
 
             if executable:
+                encoding = "locale" if sys.version_info >= (3, 10) else None
                 python_patch = subprocess.check_output(
-                    [executable, "-c", GET_PYTHON_VERSION_ONELINER], text=True
+                    [executable, "-c", GET_PYTHON_VERSION_ONELINER],
+                    text=True,
+                    encoding=encoding,
                 ).strip()
 
                 version = ".".join(str(v) for v in python_patch.split(".")[:precision])
@@ -188,8 +194,11 @@ def activate(self, python: str) -> Env:
             raise PythonVersionNotFound(python)
 
         try:
+            encoding = "locale" if sys.version_info >= (3, 10) else None
             python_version_string = subprocess.check_output(
-                [python_path, "-c", GET_PYTHON_VERSION_ONELINER], text=True
+                [python_path, "-c", GET_PYTHON_VERSION_ONELINER],
+                text=True,
+                encoding=encoding,
             )
         except CalledProcessError as e:
             raise EnvCommandError(e)
@@ -354,8 +363,9 @@ def remove(self, python: str) -> Env:
         if python_path.is_file():
             # Validate env name if provided env is a full path to python
             try:
+                encoding = "locale" if sys.version_info >= (3, 10) else None
                 env_dir = subprocess.check_output(
-                    [python, "-c", GET_ENV_PATH_ONELINER], text=True
+                    [python, "-c", GET_ENV_PATH_ONELINER], text=True, encoding=encoding
                 ).strip("\n")
                 env_name = Path(env_dir).name
                 if not self.check_env_is_for_current_project(
@@ -398,8 +408,11 @@ def remove(self, python: str) -> Env:
             pass
 
         try:
+            encoding = "locale" if sys.version_info >= (3, 10) else None
             python_version_string = subprocess.check_output(
-                [python, "-c", GET_PYTHON_VERSION_ONELINER], text=True
+                [python, "-c", GET_PYTHON_VERSION_ONELINER],
+                text=True,
+                encoding=encoding,
             )
         except CalledProcessError as e:
             raise EnvCommandError(e)
@@ -481,8 +494,11 @@ def create_venv(
         python_patch = ".".join([str(v) for v in sys.version_info[:3]])
         python_minor = ".".join([str(v) for v in sys.version_info[:2]])
         if executable:
+            encoding = "locale" if sys.version_info >= (3, 10) else None
             python_patch = subprocess.check_output(
-                [executable, "-c", GET_PYTHON_VERSION_ONELINER], text=True
+                [executable, "-c", GET_PYTHON_VERSION_ONELINER],
+                text=True,
+                encoding=encoding,
             ).strip()
             python_minor = ".".join(python_patch.split(".")[:2])
 
@@ -527,10 +543,12 @@ def create_venv(
                     continue
 
                 try:
+                    encoding = "locale" if sys.version_info >= (3, 10) else None
                     python_patch = subprocess.check_output(
                         [python, "-c", GET_PYTHON_VERSION_ONELINER],
                         stderr=subprocess.STDOUT,
                         text=True,
+                        encoding=encoding,
                     ).strip()
                 except CalledProcessError:
                     continue

src/poetry/utils/env/virtual_env.py

@@ -136,7 +136,7 @@ def includes_system_site_packages(self) -> bool:
         return pyvenv_cfg.exists() and (
             re.search(
                 r"^\s*include-system-site-packages\s*=\s*true\s*$",
-                pyvenv_cfg.read_text(),
+                pyvenv_cfg.read_text(encoding="utf-8"),
                 re.IGNORECASE | re.MULTILINE,
             )
             is not None

src/poetry/vcs/git/system.py

@@ -40,12 +40,13 @@ def run(*args: Any, **kwargs: Any) -> None:
         git_command = find_git_command()
         env = os.environ.copy()
         env["GIT_TERMINAL_PROMPT"] = "0"
-        subprocess.check_call(
+        subprocess.check_call(  # type: ignore[call-arg]
             git_command + list(args),
             stderr=subprocess.DEVNULL,
             stdout=subprocess.DEVNULL,
             env=env,
             text=True,
+            encoding="utf-8",
         )
 
     @staticmethod

tests/console/commands/env/test_remove.py

@@ -76,13 +76,18 @@ def test_remove_all(
     if envs_file == "empty":
         envs_file_path.touch()
     elif envs_file == "self":
-        envs_file_path.write_text(f'[{venv_name}]\nminor = "3.9"\npatch = "3.9.1"\n')
+        envs_file_path.write_text(
+            f'[{venv_name}]\nminor = "3.9"\npatch = "3.9.1"\n', encoding="utf-8"
+        )
     elif envs_file == "other":
-        envs_file_path.write_text('[other-abcdefgh]\nminor = "3.9"\npatch = "3.9.1"\n')
+        envs_file_path.write_text(
+            '[other-abcdefgh]\nminor = "3.9"\npatch = "3.9.1"\n', encoding="utf-8"
+        )
     elif envs_file == "self_and_other":
         envs_file_path.write_text(
             f'[{venv_name}]\nminor = "3.9"\npatch = "3.9.1"\n'
-            '[other-abcdefgh]\nminor = "3.9"\npatch = "3.9.1"\n'
+            '[other-abcdefgh]\nminor = "3.9"\npatch = "3.9.1"\n',
+            encoding="utf-8",
         )
     else:
         # no envs file -> nothing to prepare
@@ -97,7 +102,7 @@ def test_remove_all(
 
     if envs_file is not None:
         assert envs_file_path.exists()
-        envs_file_content = envs_file_path.read_text()
+        envs_file_content = envs_file_path.read_text(encoding="utf-8")
         assert venv_name not in envs_file_content
         if "other" in envs_file:
             assert "other-abcdefgh" in envs_file_content

tests/console/commands/self/test_install.py

@@ -45,7 +45,7 @@ def test_self_install(
     assert isinstance(command, SelfInstallCommand)
     pyproject_path = command.system_pyproject
     if pyproject_content:
-        pyproject_path.write_text(pyproject_content)
+        pyproject_path.write_text(pyproject_content, encoding="utf-8")
     else:
         assert not pyproject_path.exists()
 

tests/console/commands/self/test_self_command.py

@@ -29,9 +29,11 @@ def test_generate_system_pyproject_trailing_newline(
     example_system_pyproject: str,
 ) -> None:
     cmd = SelfCommand()
-    cmd.system_pyproject.write_text(example_system_pyproject + "\n" * existing_newlines)
+    cmd.system_pyproject.write_text(
+        example_system_pyproject + "\n" * existing_newlines, encoding="utf-8"
+    )
     cmd.generate_system_pyproject()
-    generated = cmd.system_pyproject.read_text()
+    generated = cmd.system_pyproject.read_text(encoding="utf-8")
 
     assert len(generated) - len(generated.rstrip("\n")) == existing_newlines
 
@@ -40,10 +42,12 @@ def test_generate_system_pyproject_carriage_returns(
     example_system_pyproject: str,
 ) -> None:
     cmd = SelfCommand()
-    cmd.system_pyproject.write_text(example_system_pyproject + "\n")
+    cmd.system_pyproject.write_text(example_system_pyproject + "\n", encoding="utf-8")
     cmd.generate_system_pyproject()
 
-    with open(cmd.system_pyproject, newline="") as f:  # do not translate newlines
+    with open(
+        cmd.system_pyproject, newline="", encoding="utf-8"
+    ) as f:  # do not translate newlines
         generated = f.read()
 
     assert "\r\r" not in generated

tests/console/commands/test_init.py

@@ -91,7 +91,7 @@ def test_noninteractive(
     assert tester.io.fetch_output() == expected
     assert tester.io.fetch_error() == ""
 
-    toml_content = (tmp_path / "pyproject.toml").read_text()
+    toml_content = (tmp_path / "pyproject.toml").read_text(encoding="utf-8")
     assert 'name = "my-package"' in toml_content
     assert 'pytest = "^3.6.0"' in toml_content
 
@@ -853,9 +853,11 @@ def test_init_existing_pyproject_simple(
 [tool.black]
 line-length = 88
 """
-    pyproject_file.write_text(existing_section)
+    pyproject_file.write_text(existing_section, encoding="utf-8")
     tester.execute(inputs=init_basic_inputs)
-    assert f"{existing_section}\n{init_basic_toml}" in pyproject_file.read_text()
+    assert f"{existing_section}\n{init_basic_toml}" in pyproject_file.read_text(
+        encoding="utf-8"
+    )
 
 
 @pytest.mark.parametrize("linesep", ["\n", "\r\n"])
@@ -871,10 +873,10 @@ def test_init_existing_pyproject_consistent_linesep(
 [tool.black]
 line-length = 88
 """.replace("\n", linesep)
-    with open(pyproject_file, "w", newline="") as f:
+    with open(pyproject_file, "w", newline="", encoding="utf-8") as f:
         f.write(existing_section)
     tester.execute(inputs=init_basic_inputs)
-    with open(pyproject_file, newline="") as f:
+    with open(pyproject_file, newline="", encoding="utf-8") as f:
         content = f.read()
     init_basic_toml = init_basic_toml.replace("\n", linesep)
     assert f"{existing_section}{linesep}{init_basic_toml}" in content
@@ -891,7 +893,7 @@ def test_init_non_interactive_existing_pyproject_add_dependency(
 [tool.black]
 line-length = 88
 """
-    pyproject_file.write_text(existing_section)
+    pyproject_file.write_text(existing_section, encoding="utf-8")
 
     repo.add_package(get_package("foo", "1.19.2"))
 
@@ -915,7 +917,9 @@ def test_init_non_interactive_existing_pyproject_add_dependency(
 python = "^3.6"
 foo = "^1.19.2"
 """
-    assert f"{existing_section}\n{expected}" in pyproject_file.read_text()
+    assert f"{existing_section}\n{expected}" in pyproject_file.read_text(
+        encoding="utf-8"
+    )
 
 
 def test_init_existing_pyproject_with_build_system_fails(
@@ -927,13 +931,13 @@ def test_init_existing_pyproject_with_build_system_fails(
 requires = ["setuptools >= 40.6.0", "wheel"]
 build-backend = "setuptools.build_meta"
 """
-    pyproject_file.write_text(existing_section)
+    pyproject_file.write_text(existing_section, encoding="utf-8")
     tester.execute(inputs=init_basic_inputs)
     assert (
         tester.io.fetch_error().strip()
         == "A pyproject.toml file with a defined build-system already exists."
     )
-    assert existing_section in pyproject_file.read_text()
+    assert existing_section in pyproject_file.read_text(encoding="utf-8")
 
 
 @pytest.mark.parametrize(
@@ -1069,7 +1073,7 @@ def mock_check_output(cmd: str, *_: Any, **__: Any) -> str:
 python = ">={python}"
 """
 
-    assert expected in pyproject_file.read_text()
+    assert expected in pyproject_file.read_text(encoding="utf-8")
 
 
 def test_get_pool(mocker: MockerFixture, source_dir: Path) -> None:

tests/console/commands/test_new.py

@@ -228,7 +228,7 @@ def mock_check_output(cmd: str, *_: Any, **__: Any) -> str:
 python = ">={python}"
 """
 
-    assert expected in pyproject_file.read_text()
+    assert expected in pyproject_file.read_text(encoding="utf-8")
 
 
 def test_basic_interactive_new(

tests/console/commands/test_run.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import subprocess
+import sys
 
 from typing import TYPE_CHECKING
 
@@ -116,7 +117,8 @@ def test_run_console_scripts_of_editable_dependencies_on_windows(
 
     cmd_script_file = tmp_venv._bin_dir / "quix.cmd"
     # `/b` ensures we only exit the script instead of any cmd.exe proc that called it
-    cmd_script_file.write_text("exit /b 123")
+    encoding = "locale" if sys.version_info >= (3, 10) else None
+    cmd_script_file.write_text("exit /b 123", encoding=encoding)
     # We prove that the CMD script executed successfully by verifying the exit code
     # matches what we wrote in the script
     assert tester.execute("quix") == 123