experiment: pbs-installer

pyproject.toml

@@ -28,6 +28,7 @@ dependencies = [
     "virtualenv (>=20.26.6,<21.0.0)",
     "xattr (>=1.0.0,<2.0.0) ; sys_platform == 'darwin'",
     "findpython (>=0.6.2,<0.7.0)",
+    "pbs-installer[download,install] (>=2025.1.6,<2026.0.0)",
 ]
 authors = [
     { name = "Sébastien Eustace", email = "sebastien@eustace.io" }

src/poetry/config/config.py

@@ -17,6 +17,7 @@
 from poetry.config.file_config_source import FileConfigSource
 from poetry.locations import CONFIG_DIR
 from poetry.locations import DEFAULT_CACHE_DIR
+from poetry.locations import data_dir
 from poetry.toml import TOMLFile
 
 
@@ -107,6 +108,7 @@ def validator(cls, policy: str) -> bool:
 class Config:
     default_config: ClassVar[dict[str, Any]] = {
         "cache-dir": str(DEFAULT_CACHE_DIR),
+        "data-dir": str(data_dir()),
         "virtualenvs": {
             "create": True,
             "in-project": None,
@@ -129,6 +131,7 @@ class Config:
             "no-binary": None,
             "only-binary": None,
         },
+        "python": {"installation-dir": os.path.join("{data-dir}", "python")},
         "solver": {
             "lazy-wheel": True,
         },
@@ -223,6 +226,13 @@ def virtualenvs_path(self) -> Path:
             path = Path(self.get("cache-dir")) / "virtualenvs"
         return Path(path).expanduser()
 
+    @property
+    def python_installation_dir(self) -> Path:
+        path = self.get("python.installation-dir")
+        if path is None:
+            path = Path(self.get("cache-dir")) / "python"
+        return Path(path).expanduser()
+
     @property
     def installer_max_workers(self) -> int:
         # This should be directly handled by ThreadPoolExecutor

src/poetry/console/application.py

@@ -80,6 +80,10 @@ def _load() -> Command:
     "env list",
     "env remove",
     "env use",
+    # Python commands,
+    "python install",
+    "python list",
+    "python remove",
     # Self commands
     "self add",
     "self install",

src/poetry/console/commands/python/install.py

@@ -0,0 +1,195 @@
+from __future__ import annotations
+
+from subprocess import CalledProcessError
+from typing import TYPE_CHECKING
+from typing import ClassVar
+from typing import cast
+
+import pbs_installer as pbi
+
+from cleo.helpers import argument
+from cleo.helpers import option
+from poetry.core.constraints.version.version import Version
+from poetry.core.version.exceptions import InvalidVersionError
+
+from poetry.config.config import Config
+from poetry.console.commands.command import Command
+from poetry.console.commands.python.remove import PythonRemoveCommand
+from poetry.console.exceptions import ConsoleMessage
+from poetry.console.exceptions import PoetryRuntimeError
+from poetry.utils.env.python_manager import PoetryPythonPathProvider
+
+
+if TYPE_CHECKING:
+    from cleo.io.inputs.argument import Argument
+    from cleo.io.inputs.option import Option
+
+
+BAD_PYTHON_INSTALL_INFO = [
+    "This could happen because you are missing platform dependencies required.",
+    "Please refer to https://gregoryszorc.com/docs/python-build-standalone/main/running.html#runtime-requirements "
+    "for more information about the necessary requirements.",
+    "Please remove the failing Python installation using <c1>poetry python remove <version></> before continuing.",
+]
+
+
+class PythonInstallCommand(Command):
+    name = "python install"
+
+    arguments: ClassVar[list[Argument]] = [
+        argument("python", "The python version to install.")
+    ]
+
+    options: ClassVar[list[Option]] = [
+        option("clean", "c", "Cleanup installation if check fails.", flag=True),
+        option(
+            "free-threaded", "f", "Use free-threaded version if available.", flag=True
+        ),
+        option(
+            "implementation",
+            "i",
+            "Python implementation to use. (cpython, pypy)",
+            flag=False,
+            default="cpython",
+        ),
+        option(
+            "reinstall", "r", "Reinstall if installation already exists.", flag=True
+        ),
+    ]
+
+    description = "Install the specified Python version from the Python Standalone Builds project."
+
+    def handle(self) -> int:
+        request = self.argument("python")
+        impl = self.option("implementation").lower()
+        reinstall = self.option("reinstall")
+        free_threaded = self.option("free-threaded")
+
+        try:
+            version = Version.parse(request)
+        except (ValueError, InvalidVersionError):
+            self.io.write_error_line(
+                f"<error>Invalid Python version requested <b>{request}</></error>"
+            )
+            return 1
+
+        if free_threaded and version < Version.parse("3.13.0"):
+            self.io.write_error_line("")
+            self.io.write_error_line(
+                "Free threading is not supported for Python versions prior to <c1>3.13.0</>.\n\n"
+                "See https://docs.python.org/3/howto/free-threading-python.html for more information."
+            )
+            self.io.write_error_line("")
+            return 1
+
+        try:
+            pyver, _ = pbi.get_download_link(
+                request, implementation=impl, free_threaded=free_threaded
+            )
+        except ValueError:
+            self.io.write_error_line(
+                "No suitable standalone build found for the requested Python version."
+            )
+            return 1
+
+        version = Version.from_parts(
+            major=pyver.major, minor=pyver.minor, patch=pyver.micro
+        )
+
+        provider: PoetryPythonPathProvider = cast(
+            PoetryPythonPathProvider, PoetryPythonPathProvider.create()
+        )
+        bad_executables = set()
+
+        for python in provider.find_pythons():
+            try:
+                if python.implementation.lower() != impl:
+                    continue
+
+                if version == Version.parse(str(python.version)):
+                    if reinstall:
+                        break
+                    self.io.write_line(
+                        "Python version already installed at "
+                        f"<b>{PoetryPythonPathProvider.installation_dir(version, impl)}</>.\n"
+                    )
+                    self.io.write_line(
+                        f"Use <c1>--reinstall</> to install anyway, "
+                        f"or use <c1>poetry python remove {version}</> first."
+                    )
+                    return 1
+            except CalledProcessError:
+                bad_executables.add(python.executable)
+
+        if bad_executables:
+            raise PoetryRuntimeError(
+                reason="One or more installed version do not work on your system. This is not a Poetry issue.",
+                messages=[
+                    ConsoleMessage("\n".join(e.as_posix() for e in bad_executables))
+                    .indent("  - ")
+                    .make_section("Failing Executables")
+                    .wrap("info"),
+                    *[
+                        ConsoleMessage(m).wrap("warning")
+                        for m in BAD_PYTHON_INSTALL_INFO
+                    ],
+                ],
+            )
+
+        request_title = f"<c1>{request}</> (<b>{impl}</>)"
+
+        try:
+            self.io.write(f"Downloading and installing {request_title} ... ")
+            # this can be broken into download, and install_file if required to make
+            # use of Poetry's own mechanics for download and unpack
+            pbi.install(
+                request,
+                Config().python_installation_dir,
+                True,
+                implementation=impl,
+                free_threaded=free_threaded,
+            )
+        except ValueError:
+            self.io.write("<fg=red>Failed</>\n")
+            self.io.write_error_line("")
+            self.io.write_error_line(
+                "No suitable standalone build found for the requested Python version."
+            )
+            self.io.write_error_line("")
+            return 1
+
+        self.io.write("<fg=green>Done</>\n")
+
+        self.io.write(f"Testing {request_title} ... ")
+
+        provider = PoetryPythonPathProvider(
+            PoetryPythonPathProvider.installation_bin_paths(version, impl)
+        )
+
+        for python in provider.find_pythons():
+            try:
+                # this forces a python -c command internally in pbs-installer
+                _ = python.version
+            except CalledProcessError as e:
+                self.io.write("<fg=red>Failed</>\n")
+
+                installation_dir = PoetryPythonPathProvider.installation_dir(
+                    version, impl
+                )
+                if installation_dir.exists() and self.option("clean"):
+                    PythonRemoveCommand.remove_python_installation(
+                        request, impl, self.io
+                    )
+
+                raise PoetryRuntimeError.create(
+                    reason="The installed version did not work on your system. This is not a Poetry issue.",
+                    exception=e,
+                    info=[
+                        ConsoleMessage(f"{m}\n").wrap("info").text
+                        for m in BAD_PYTHON_INSTALL_INFO
+                    ],
+                )
+
+        self.io.write("<fg=green>Done</>\n")
+
+        return 0

src/poetry/console/commands/python/list.py

@@ -0,0 +1,142 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+from typing import ClassVar
+from typing import NamedTuple
+
+from cleo.helpers import argument
+from cleo.helpers import option
+from pbs_installer._install import THIS_ARCH
+from pbs_installer._install import THIS_PLATFORM
+from pbs_installer._versions import PYTHON_VERSIONS
+
+from poetry.config.config import Config
+from poetry.console.commands.command import Command
+from poetry.utils.env.python_manager import Python
+
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+    from cleo.io.inputs.argument import Argument
+    from cleo.io.inputs.option import Option
+
+
+class PythonInfo(NamedTuple):
+    major: int
+    minor: int
+    patch: int
+    implementation: str
+    executable: Path | None
+
+
+class PythonListCommand(Command):
+    name = "python list"
+
+    arguments: ClassVar[list[Argument]] = [
+        argument("version", "Python version to search for.", optional=True)
+    ]
+
+    options: ClassVar[list[Option]] = [
+        option(
+            "all",
+            "a",
+            "List all versions, including those available for download.",
+            flag=True,
+        ),
+        option(
+            "implementation", "i", "Python implementation to search for.", flag=False
+        ),
+        option("managed", "m", "List only Poetry managed Python versions.", flag=True),
+    ]
+
+    description = "Shows Python versions available for this environment."
+
+    def handle(self) -> int:
+        rows: list[PythonInfo] = []
+
+        for pv in Python.find_all():
+            rows.append(
+                PythonInfo(
+                    major=pv.major,
+                    minor=pv.minor,
+                    patch=pv.patch,
+                    implementation=pv.implementation.lower(),
+                    executable=pv.executable,
+                )
+            )
+
+        if self.option("all"):
+            for pv in PYTHON_VERSIONS:
+                for _ in {
+                    k[1]
+                    for k in PYTHON_VERSIONS[pv]
+                    if (k[0], k[1]) == (THIS_PLATFORM, THIS_ARCH)
+                }:
+                    rows.append(
+                        PythonInfo(
+                            major=pv.major,
+                            minor=pv.minor,
+                            patch=pv.micro,
+                            implementation=pv.implementation.lower(),
+                            executable=None,
+                        )
+                    )
+
+        rows.sort(
+            key=lambda x: (x.major, x.minor, x.patch, x.implementation), reverse=True
+        )
+
+        table = self.table(style="compact")
+        table.set_headers(
+            [
+                "<fg=magenta;options=bold>Version</>",
+                "<fg=magenta;options=bold>Implementation</>",
+                "<fg=magenta;options=bold>Manager</>",
+                "<fg=magenta;options=bold>Path</>",
+            ]
+        )
+
+        implementations = {"cpython": "CPython", "pypy": "PyPy"}
+        python_installation_path = Config().python_installation_dir
+
+        row_count = 0
+
+        for pv in rows:
+            version = f"{pv.major}.{pv.minor}.{pv.patch}"
+            implementation = implementations.get(
+                pv.implementation.lower(), pv.implementation
+            )
+            is_poetry_managed = (
+                pv.executable is None
+                or pv.executable.resolve().is_relative_to(python_installation_path)
+            )
+
+            if self.option("managed") and not is_poetry_managed:
+                continue
+
+            manager = (
+                "<fg=blue>Poetry</>" if is_poetry_managed else "<fg=yellow>System</>"
+            )
+            path = (
+                f"<fg=green>{pv.executable.as_posix()}</>"
+                if pv.executable
+                else "Downloadable."
+            )
+
+            table.add_row(
+                [
+                    f"<c1>{version}</>",
+                    f"<b>{implementation}</>",
+                    f"{manager}",
+                    f"{path}",
+                ]
+            )
+            row_count += 1
+
+        if row_count > 0:
+            table.render()
+        else:
+            self.io.write_line("No Python installations found.")
+
+        return 0