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836 lines
30 KiB
Python
836 lines
30 KiB
Python
"""
|
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Create a wheel that, when installed, will make the source package 'editable'
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(add it to the interpreter's path, including metadata) per PEP 660. Replaces
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'setup.py develop'.
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|
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.. note::
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One of the mechanisms briefly mentioned in PEP 660 to implement editable installs is
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to create a separated directory inside ``build`` and use a .pth file to point to that
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directory. In the context of this file such directory is referred as
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*auxiliary build directory* or ``auxiliary_dir``.
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"""
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|
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import logging
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import os
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import re
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import shutil
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import sys
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import traceback
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import warnings
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from contextlib import suppress
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from enum import Enum
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from inspect import cleandoc
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from itertools import chain
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from pathlib import Path
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from tempfile import TemporaryDirectory
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from typing import (
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TYPE_CHECKING,
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Dict,
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Iterable,
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Iterator,
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List,
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Mapping,
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Optional,
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Tuple,
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TypeVar,
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Union,
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)
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from setuptools import Command, SetuptoolsDeprecationWarning, errors, namespaces
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from setuptools.command.build_py import build_py as build_py_cls
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from setuptools.discovery import find_package_path
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from setuptools.dist import Distribution
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if TYPE_CHECKING:
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from wheel.wheelfile import WheelFile # noqa
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if sys.version_info >= (3, 8):
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from typing import Protocol
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elif TYPE_CHECKING:
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from typing_extensions import Protocol
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else:
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from abc import ABC as Protocol
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_Path = Union[str, Path]
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_P = TypeVar("_P", bound=_Path)
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_logger = logging.getLogger(__name__)
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|
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class _EditableMode(Enum):
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"""
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Possible editable installation modes:
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`lenient` (new files automatically added to the package - DEFAULT);
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`strict` (requires a new installation when files are added/removed); or
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`compat` (attempts to emulate `python setup.py develop` - DEPRECATED).
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"""
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STRICT = "strict"
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LENIENT = "lenient"
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COMPAT = "compat" # TODO: Remove `compat` after Dec/2022.
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@classmethod
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def convert(cls, mode: Optional[str]) -> "_EditableMode":
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if not mode:
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return _EditableMode.LENIENT # default
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_mode = mode.upper()
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if _mode not in _EditableMode.__members__:
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raise errors.OptionError(f"Invalid editable mode: {mode!r}. Try: 'strict'.")
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if _mode == "COMPAT":
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msg = """
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The 'compat' editable mode is transitional and will be removed
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in future versions of `setuptools`.
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Please adapt your code accordingly to use either the 'strict' or the
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'lenient' modes.
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|
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For more information, please check:
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https://setuptools.pypa.io/en/latest/userguide/development_mode.html
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"""
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warnings.warn(msg, SetuptoolsDeprecationWarning)
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return _EditableMode[_mode]
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|
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_STRICT_WARNING = """
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New or renamed files may not be automatically picked up without a new installation.
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"""
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_LENIENT_WARNING = """
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Options like `package-data`, `include/exclude-package-data` or
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`packages.find.exclude/include` may have no effect.
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"""
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class editable_wheel(Command):
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"""Build 'editable' wheel for development.
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(This command is reserved for internal use of setuptools).
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"""
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description = "create a PEP 660 'editable' wheel"
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user_options = [
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("dist-dir=", "d", "directory to put final built distributions in"),
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("dist-info-dir=", "I", "path to a pre-build .dist-info directory"),
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("mode=", None, cleandoc(_EditableMode.__doc__ or "")),
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]
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def initialize_options(self):
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self.dist_dir = None
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self.dist_info_dir = None
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self.project_dir = None
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self.mode = None
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def finalize_options(self):
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dist = self.distribution
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self.project_dir = dist.src_root or os.curdir
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self.package_dir = dist.package_dir or {}
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self.dist_dir = Path(self.dist_dir or os.path.join(self.project_dir, "dist"))
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def run(self):
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try:
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self.dist_dir.mkdir(exist_ok=True)
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self._ensure_dist_info()
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# Add missing dist_info files
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self.reinitialize_command("bdist_wheel")
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bdist_wheel = self.get_finalized_command("bdist_wheel")
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bdist_wheel.write_wheelfile(self.dist_info_dir)
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self._create_wheel_file(bdist_wheel)
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except Exception as ex:
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traceback.print_exc()
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msg = """
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Support for editable installs via PEP 660 was recently introduced
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in `setuptools`. If you are seeing this error, please report to:
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https://github.com/pypa/setuptools/issues
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Meanwhile you can try the legacy behavior by setting an
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environment variable and trying to install again:
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SETUPTOOLS_ENABLE_FEATURES="legacy-editable"
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"""
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raise errors.InternalError(cleandoc(msg)) from ex
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def _ensure_dist_info(self):
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if self.dist_info_dir is None:
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dist_info = self.reinitialize_command("dist_info")
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dist_info.output_dir = self.dist_dir
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dist_info.ensure_finalized()
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dist_info.run()
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self.dist_info_dir = dist_info.dist_info_dir
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else:
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assert str(self.dist_info_dir).endswith(".dist-info")
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assert Path(self.dist_info_dir, "METADATA").exists()
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def _install_namespaces(self, installation_dir, pth_prefix):
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# XXX: Only required to support the deprecated namespace practice
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dist = self.distribution
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if not dist.namespace_packages:
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return
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src_root = Path(self.project_dir, self.package_dir.get("", ".")).resolve()
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installer = _NamespaceInstaller(dist, installation_dir, pth_prefix, src_root)
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installer.install_namespaces()
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def _find_egg_info_dir(self) -> Optional[str]:
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parent_dir = Path(self.dist_info_dir).parent if self.dist_info_dir else Path()
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candidates = map(str, parent_dir.glob("*.egg-info"))
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return next(candidates, None)
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def _configure_build(
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self, name: str, unpacked_wheel: _Path, build_lib: _Path, tmp_dir: _Path
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):
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"""Configure commands to behave in the following ways:
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- Build commands can write to ``build_lib`` if they really want to...
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(but this folder is expected to be ignored and modules are expected to live
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in the project directory...)
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- Binary extensions should be built in-place (editable_mode = True)
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- Data/header/script files are not part of the "editable" specification
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so they are written directly to the unpacked_wheel directory.
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"""
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# Non-editable files (data, headers, scripts) are written directly to the
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# unpacked_wheel
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dist = self.distribution
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wheel = str(unpacked_wheel)
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build_lib = str(build_lib)
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data = str(Path(unpacked_wheel, f"{name}.data", "data"))
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headers = str(Path(unpacked_wheel, f"{name}.data", "headers"))
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scripts = str(Path(unpacked_wheel, f"{name}.data", "scripts"))
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# egg-info may be generated again to create a manifest (used for package data)
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egg_info = dist.reinitialize_command("egg_info", reinit_subcommands=True)
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egg_info.egg_base = str(tmp_dir)
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egg_info.ignore_egg_info_in_manifest = True
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build = dist.reinitialize_command("build", reinit_subcommands=True)
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install = dist.reinitialize_command("install", reinit_subcommands=True)
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build.build_platlib = build.build_purelib = build.build_lib = build_lib
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install.install_purelib = install.install_platlib = install.install_lib = wheel
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install.install_scripts = build.build_scripts = scripts
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install.install_headers = headers
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install.install_data = data
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install_scripts = dist.get_command_obj("install_scripts")
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install_scripts.no_ep = True
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build.build_temp = str(tmp_dir)
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build_py = dist.get_command_obj("build_py")
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build_py.compile = False
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build_py.existing_egg_info_dir = self._find_egg_info_dir()
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self._set_editable_mode()
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build.ensure_finalized()
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install.ensure_finalized()
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def _set_editable_mode(self):
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"""Set the ``editable_mode`` flag in the build sub-commands"""
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dist = self.distribution
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build = dist.get_command_obj("build")
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for cmd_name in build.get_sub_commands():
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cmd = dist.get_command_obj(cmd_name)
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if hasattr(cmd, "editable_mode"):
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cmd.editable_mode = True
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elif hasattr(cmd, "inplace"):
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cmd.inplace = True # backward compatibility with distutils
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|
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def _collect_build_outputs(self) -> Tuple[List[str], Dict[str, str]]:
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|
files: List[str] = []
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mapping: Dict[str, str] = {}
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build = self.get_finalized_command("build")
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for cmd_name in build.get_sub_commands():
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cmd = self.get_finalized_command(cmd_name)
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if hasattr(cmd, "get_outputs"):
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files.extend(cmd.get_outputs() or [])
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if hasattr(cmd, "get_output_mapping"):
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mapping.update(cmd.get_output_mapping() or {})
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return files, mapping
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|
|
|
def _run_build_commands(
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self, dist_name: str, unpacked_wheel: _Path, build_lib: _Path, tmp_dir: _Path
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) -> Tuple[List[str], Dict[str, str]]:
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self._configure_build(dist_name, unpacked_wheel, build_lib, tmp_dir)
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self._run_build_subcommands()
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files, mapping = self._collect_build_outputs()
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self._run_install("headers")
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self._run_install("scripts")
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self._run_install("data")
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return files, mapping
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|
|
|
def _run_build_subcommands(self):
|
|
"""
|
|
Issue #3501 indicates that some plugins/customizations might rely on:
|
|
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|
1. ``build_py`` not running
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|
2. ``build_py`` always copying files to ``build_lib``
|
|
|
|
However both these assumptions may be false in editable_wheel.
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|
This method implements a temporary workaround to support the ecosystem
|
|
while the implementations catch up.
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|
"""
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|
# TODO: Once plugins/customisations had the chance to catch up, replace
|
|
# `self._run_build_subcommands()` with `self.run_command("build")`.
|
|
# Also remove _safely_run, TestCustomBuildPy. Suggested date: Aug/2023.
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|
build: Command = self.get_finalized_command("build")
|
|
for name in build.get_sub_commands():
|
|
cmd = self.get_finalized_command(name)
|
|
if name == "build_py" and type(cmd) != build_py_cls:
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|
self._safely_run(name)
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|
else:
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|
self.run_command(name)
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|
|
|
def _safely_run(self, cmd_name: str):
|
|
try:
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|
return self.run_command(cmd_name)
|
|
except Exception:
|
|
msg = f"""{traceback.format_exc()}\n
|
|
If you are seeing this warning it is very likely that a setuptools
|
|
plugin or customization overrides the `{cmd_name}` command, without
|
|
tacking into consideration how editable installs run build steps
|
|
starting from v64.0.0.
|
|
|
|
Plugin authors and developers relying on custom build steps are encouraged
|
|
to update their `{cmd_name}` implementation considering the information in
|
|
https://setuptools.pypa.io/en/latest/userguide/extension.html
|
|
about editable installs.
|
|
|
|
For the time being `setuptools` will silence this error and ignore
|
|
the faulty command, but this behaviour will change in future versions.\n
|
|
"""
|
|
warnings.warn(msg, SetuptoolsDeprecationWarning, stacklevel=2)
|
|
|
|
def _create_wheel_file(self, bdist_wheel):
|
|
from wheel.wheelfile import WheelFile
|
|
|
|
dist_info = self.get_finalized_command("dist_info")
|
|
dist_name = dist_info.name
|
|
tag = "-".join(bdist_wheel.get_tag())
|
|
build_tag = "0.editable" # According to PEP 427 needs to start with digit
|
|
archive_name = f"{dist_name}-{build_tag}-{tag}.whl"
|
|
wheel_path = Path(self.dist_dir, archive_name)
|
|
if wheel_path.exists():
|
|
wheel_path.unlink()
|
|
|
|
unpacked_wheel = TemporaryDirectory(suffix=archive_name)
|
|
build_lib = TemporaryDirectory(suffix=".build-lib")
|
|
build_tmp = TemporaryDirectory(suffix=".build-temp")
|
|
|
|
with unpacked_wheel as unpacked, build_lib as lib, build_tmp as tmp:
|
|
unpacked_dist_info = Path(unpacked, Path(self.dist_info_dir).name)
|
|
shutil.copytree(self.dist_info_dir, unpacked_dist_info)
|
|
self._install_namespaces(unpacked, dist_info.name)
|
|
files, mapping = self._run_build_commands(dist_name, unpacked, lib, tmp)
|
|
strategy = self._select_strategy(dist_name, tag, lib)
|
|
with strategy, WheelFile(wheel_path, "w") as wheel_obj:
|
|
strategy(wheel_obj, files, mapping)
|
|
wheel_obj.write_files(unpacked)
|
|
|
|
return wheel_path
|
|
|
|
def _run_install(self, category: str):
|
|
has_category = getattr(self.distribution, f"has_{category}", None)
|
|
if has_category and has_category():
|
|
_logger.info(f"Installing {category} as non editable")
|
|
self.run_command(f"install_{category}")
|
|
|
|
def _select_strategy(
|
|
self,
|
|
name: str,
|
|
tag: str,
|
|
build_lib: _Path,
|
|
) -> "EditableStrategy":
|
|
"""Decides which strategy to use to implement an editable installation."""
|
|
build_name = f"__editable__.{name}-{tag}"
|
|
project_dir = Path(self.project_dir)
|
|
mode = _EditableMode.convert(self.mode)
|
|
|
|
if mode is _EditableMode.STRICT:
|
|
auxiliary_dir = _empty_dir(Path(self.project_dir, "build", build_name))
|
|
return _LinkTree(self.distribution, name, auxiliary_dir, build_lib)
|
|
|
|
packages = _find_packages(self.distribution)
|
|
has_simple_layout = _simple_layout(packages, self.package_dir, project_dir)
|
|
is_compat_mode = mode is _EditableMode.COMPAT
|
|
if set(self.package_dir) == {""} and has_simple_layout or is_compat_mode:
|
|
# src-layout(ish) is relatively safe for a simple pth file
|
|
src_dir = self.package_dir.get("", ".")
|
|
return _StaticPth(self.distribution, name, [Path(project_dir, src_dir)])
|
|
|
|
# Use a MetaPathFinder to avoid adding accidental top-level packages/modules
|
|
return _TopLevelFinder(self.distribution, name)
|
|
|
|
|
|
class EditableStrategy(Protocol):
|
|
def __call__(self, wheel: "WheelFile", files: List[str], mapping: Dict[str, str]):
|
|
...
|
|
|
|
def __enter__(self):
|
|
...
|
|
|
|
def __exit__(self, _exc_type, _exc_value, _traceback):
|
|
...
|
|
|
|
|
|
class _StaticPth:
|
|
def __init__(self, dist: Distribution, name: str, path_entries: List[Path]):
|
|
self.dist = dist
|
|
self.name = name
|
|
self.path_entries = path_entries
|
|
|
|
def __call__(self, wheel: "WheelFile", files: List[str], mapping: Dict[str, str]):
|
|
entries = "\n".join((str(p.resolve()) for p in self.path_entries))
|
|
contents = bytes(f"{entries}\n", "utf-8")
|
|
wheel.writestr(f"__editable__.{self.name}.pth", contents)
|
|
|
|
def __enter__(self):
|
|
msg = f"""
|
|
Editable install will be performed using .pth file to extend `sys.path` with:
|
|
{self.path_entries!r}
|
|
"""
|
|
_logger.warning(msg + _LENIENT_WARNING)
|
|
return self
|
|
|
|
def __exit__(self, _exc_type, _exc_value, _traceback):
|
|
...
|
|
|
|
|
|
class _LinkTree(_StaticPth):
|
|
"""
|
|
Creates a ``.pth`` file that points to a link tree in the ``auxiliary_dir``.
|
|
|
|
This strategy will only link files (not dirs), so it can be implemented in
|
|
any OS, even if that means using hardlinks instead of symlinks.
|
|
|
|
By collocating ``auxiliary_dir`` and the original source code, limitations
|
|
with hardlinks should be avoided.
|
|
"""
|
|
def __init__(
|
|
self, dist: Distribution,
|
|
name: str,
|
|
auxiliary_dir: _Path,
|
|
build_lib: _Path,
|
|
):
|
|
self.auxiliary_dir = Path(auxiliary_dir)
|
|
self.build_lib = Path(build_lib).resolve()
|
|
self._file = dist.get_command_obj("build_py").copy_file
|
|
super().__init__(dist, name, [self.auxiliary_dir])
|
|
|
|
def __call__(self, wheel: "WheelFile", files: List[str], mapping: Dict[str, str]):
|
|
self._create_links(files, mapping)
|
|
super().__call__(wheel, files, mapping)
|
|
|
|
def _normalize_output(self, file: str) -> Optional[str]:
|
|
# Files relative to build_lib will be normalized to None
|
|
with suppress(ValueError):
|
|
path = Path(file).resolve().relative_to(self.build_lib)
|
|
return str(path).replace(os.sep, '/')
|
|
return None
|
|
|
|
def _create_file(self, relative_output: str, src_file: str, link=None):
|
|
dest = self.auxiliary_dir / relative_output
|
|
if not dest.parent.is_dir():
|
|
dest.parent.mkdir(parents=True)
|
|
self._file(src_file, dest, link=link)
|
|
|
|
def _create_links(self, outputs, output_mapping):
|
|
self.auxiliary_dir.mkdir(parents=True, exist_ok=True)
|
|
link_type = "sym" if _can_symlink_files(self.auxiliary_dir) else "hard"
|
|
mappings = {
|
|
self._normalize_output(k): v
|
|
for k, v in output_mapping.items()
|
|
}
|
|
mappings.pop(None, None) # remove files that are not relative to build_lib
|
|
|
|
for output in outputs:
|
|
relative = self._normalize_output(output)
|
|
if relative and relative not in mappings:
|
|
self._create_file(relative, output)
|
|
|
|
for relative, src in mappings.items():
|
|
self._create_file(relative, src, link=link_type)
|
|
|
|
def __enter__(self):
|
|
msg = "Strict editable install will be performed using a link tree.\n"
|
|
_logger.warning(msg + _STRICT_WARNING)
|
|
return self
|
|
|
|
def __exit__(self, _exc_type, _exc_value, _traceback):
|
|
msg = f"""\n
|
|
Strict editable installation performed using the auxiliary directory:
|
|
{self.auxiliary_dir}
|
|
|
|
Please be careful to not remove this directory, otherwise you might not be able
|
|
to import/use your package.
|
|
"""
|
|
warnings.warn(msg, InformationOnly)
|
|
|
|
|
|
class _TopLevelFinder:
|
|
def __init__(self, dist: Distribution, name: str):
|
|
self.dist = dist
|
|
self.name = name
|
|
|
|
def __call__(self, wheel: "WheelFile", files: List[str], mapping: Dict[str, str]):
|
|
src_root = self.dist.src_root or os.curdir
|
|
top_level = chain(_find_packages(self.dist), _find_top_level_modules(self.dist))
|
|
package_dir = self.dist.package_dir or {}
|
|
roots = _find_package_roots(top_level, package_dir, src_root)
|
|
|
|
namespaces_: Dict[str, List[str]] = dict(chain(
|
|
_find_namespaces(self.dist.packages or [], roots),
|
|
((ns, []) for ns in _find_virtual_namespaces(roots)),
|
|
))
|
|
|
|
name = f"__editable__.{self.name}.finder"
|
|
finder = _make_identifier(name)
|
|
content = bytes(_finder_template(name, roots, namespaces_), "utf-8")
|
|
wheel.writestr(f"{finder}.py", content)
|
|
|
|
content = bytes(f"import {finder}; {finder}.install()", "utf-8")
|
|
wheel.writestr(f"__editable__.{self.name}.pth", content)
|
|
|
|
def __enter__(self):
|
|
msg = "Editable install will be performed using a meta path finder.\n"
|
|
_logger.warning(msg + _LENIENT_WARNING)
|
|
return self
|
|
|
|
def __exit__(self, _exc_type, _exc_value, _traceback):
|
|
...
|
|
|
|
|
|
def _can_symlink_files(base_dir: Path) -> bool:
|
|
with TemporaryDirectory(dir=str(base_dir.resolve())) as tmp:
|
|
path1, path2 = Path(tmp, "file1.txt"), Path(tmp, "file2.txt")
|
|
path1.write_text("file1", encoding="utf-8")
|
|
with suppress(AttributeError, NotImplementedError, OSError):
|
|
os.symlink(path1, path2)
|
|
if path2.is_symlink() and path2.read_text(encoding="utf-8") == "file1":
|
|
return True
|
|
|
|
try:
|
|
os.link(path1, path2) # Ensure hard links can be created
|
|
except Exception as ex:
|
|
msg = (
|
|
"File system does not seem to support either symlinks or hard links. "
|
|
"Strict editable installs require one of them to be supported."
|
|
)
|
|
raise LinksNotSupported(msg) from ex
|
|
return False
|
|
|
|
|
|
def _simple_layout(
|
|
packages: Iterable[str], package_dir: Dict[str, str], project_dir: Path
|
|
) -> bool:
|
|
"""Return ``True`` if:
|
|
- all packages are contained by the same parent directory, **and**
|
|
- all packages become importable if the parent directory is added to ``sys.path``.
|
|
|
|
>>> _simple_layout(['a'], {"": "src"}, "/tmp/myproj")
|
|
True
|
|
>>> _simple_layout(['a', 'a.b'], {"": "src"}, "/tmp/myproj")
|
|
True
|
|
>>> _simple_layout(['a', 'a.b'], {}, "/tmp/myproj")
|
|
True
|
|
>>> _simple_layout(['a', 'a.a1', 'a.a1.a2', 'b'], {"": "src"}, "/tmp/myproj")
|
|
True
|
|
>>> _simple_layout(['a', 'a.a1', 'a.a1.a2', 'b'], {"a": "a", "b": "b"}, ".")
|
|
True
|
|
>>> _simple_layout(['a', 'a.a1', 'a.a1.a2', 'b'], {"a": "_a", "b": "_b"}, ".")
|
|
False
|
|
>>> _simple_layout(['a', 'a.a1', 'a.a1.a2', 'b'], {"a": "_a"}, "/tmp/myproj")
|
|
False
|
|
>>> _simple_layout(['a', 'a.a1', 'a.a1.a2', 'b'], {"a.a1.a2": "_a2"}, ".")
|
|
False
|
|
>>> _simple_layout(['a', 'a.b'], {"": "src", "a.b": "_ab"}, "/tmp/myproj")
|
|
False
|
|
"""
|
|
layout = {
|
|
pkg: find_package_path(pkg, package_dir, project_dir)
|
|
for pkg in packages
|
|
}
|
|
if not layout:
|
|
return False
|
|
parent = os.path.commonpath([_parent_path(k, v) for k, v in layout.items()])
|
|
return all(
|
|
_normalize_path(Path(parent, *key.split('.'))) == _normalize_path(value)
|
|
for key, value in layout.items()
|
|
)
|
|
|
|
|
|
def _parent_path(pkg, pkg_path):
|
|
"""Infer the parent path containing a package, that if added to ``sys.path`` would
|
|
allow importing that package.
|
|
When ``pkg`` is directly mapped into a directory with a different name, return its
|
|
own path.
|
|
>>> _parent_path("a", "src/a")
|
|
'src'
|
|
>>> _parent_path("b", "src/c")
|
|
'src/c'
|
|
"""
|
|
parent = pkg_path[:-len(pkg)] if pkg_path.endswith(pkg) else pkg_path
|
|
return parent.rstrip("/" + os.sep)
|
|
|
|
|
|
def _find_packages(dist: Distribution) -> Iterator[str]:
|
|
yield from iter(dist.packages or [])
|
|
|
|
py_modules = dist.py_modules or []
|
|
nested_modules = [mod for mod in py_modules if "." in mod]
|
|
if dist.ext_package:
|
|
yield dist.ext_package
|
|
else:
|
|
ext_modules = dist.ext_modules or []
|
|
nested_modules += [x.name for x in ext_modules if "." in x.name]
|
|
|
|
for module in nested_modules:
|
|
package, _, _ = module.rpartition(".")
|
|
yield package
|
|
|
|
|
|
def _find_top_level_modules(dist: Distribution) -> Iterator[str]:
|
|
py_modules = dist.py_modules or []
|
|
yield from (mod for mod in py_modules if "." not in mod)
|
|
|
|
if not dist.ext_package:
|
|
ext_modules = dist.ext_modules or []
|
|
yield from (x.name for x in ext_modules if "." not in x.name)
|
|
|
|
|
|
def _find_package_roots(
|
|
packages: Iterable[str],
|
|
package_dir: Mapping[str, str],
|
|
src_root: _Path,
|
|
) -> Dict[str, str]:
|
|
pkg_roots: Dict[str, str] = {
|
|
pkg: _absolute_root(find_package_path(pkg, package_dir, src_root))
|
|
for pkg in sorted(packages)
|
|
}
|
|
|
|
return _remove_nested(pkg_roots)
|
|
|
|
|
|
def _absolute_root(path: _Path) -> str:
|
|
"""Works for packages and top-level modules"""
|
|
path_ = Path(path)
|
|
parent = path_.parent
|
|
|
|
if path_.exists():
|
|
return str(path_.resolve())
|
|
else:
|
|
return str(parent.resolve() / path_.name)
|
|
|
|
|
|
def _find_virtual_namespaces(pkg_roots: Dict[str, str]) -> Iterator[str]:
|
|
"""By carefully designing ``package_dir``, it is possible to implement the logical
|
|
structure of PEP 420 in a package without the corresponding directories.
|
|
|
|
Moreover a parent package can be purposefully/accidentally skipped in the discovery
|
|
phase (e.g. ``find_packages(include=["mypkg.*"])``, when ``mypkg.foo`` is included
|
|
by ``mypkg`` itself is not).
|
|
We consider this case to also be a virtual namespace (ignoring the original
|
|
directory) to emulate a non-editable installation.
|
|
|
|
This function will try to find these kinds of namespaces.
|
|
"""
|
|
for pkg in pkg_roots:
|
|
if "." not in pkg:
|
|
continue
|
|
parts = pkg.split(".")
|
|
for i in range(len(parts) - 1, 0, -1):
|
|
partial_name = ".".join(parts[:i])
|
|
path = Path(find_package_path(partial_name, pkg_roots, ""))
|
|
if not path.exists() or partial_name not in pkg_roots:
|
|
# partial_name not in pkg_roots ==> purposefully/accidentally skipped
|
|
yield partial_name
|
|
|
|
|
|
def _find_namespaces(
|
|
packages: List[str], pkg_roots: Dict[str, str]
|
|
) -> Iterator[Tuple[str, List[str]]]:
|
|
for pkg in packages:
|
|
path = find_package_path(pkg, pkg_roots, "")
|
|
if Path(path).exists() and not Path(path, "__init__.py").exists():
|
|
yield (pkg, [path])
|
|
|
|
|
|
def _remove_nested(pkg_roots: Dict[str, str]) -> Dict[str, str]:
|
|
output = dict(pkg_roots.copy())
|
|
|
|
for pkg, path in reversed(list(pkg_roots.items())):
|
|
if any(
|
|
pkg != other and _is_nested(pkg, path, other, other_path)
|
|
for other, other_path in pkg_roots.items()
|
|
):
|
|
output.pop(pkg)
|
|
|
|
return output
|
|
|
|
|
|
def _is_nested(pkg: str, pkg_path: str, parent: str, parent_path: str) -> bool:
|
|
"""
|
|
Return ``True`` if ``pkg`` is nested inside ``parent`` both logically and in the
|
|
file system.
|
|
>>> _is_nested("a.b", "path/a/b", "a", "path/a")
|
|
True
|
|
>>> _is_nested("a.b", "path/a/b", "a", "otherpath/a")
|
|
False
|
|
>>> _is_nested("a.b", "path/a/b", "c", "path/c")
|
|
False
|
|
>>> _is_nested("a.a", "path/a/a", "a", "path/a")
|
|
True
|
|
>>> _is_nested("b.a", "path/b/a", "a", "path/a")
|
|
False
|
|
"""
|
|
norm_pkg_path = _normalize_path(pkg_path)
|
|
rest = pkg.replace(parent, "", 1).strip(".").split(".")
|
|
return (
|
|
pkg.startswith(parent)
|
|
and norm_pkg_path == _normalize_path(Path(parent_path, *rest))
|
|
)
|
|
|
|
|
|
def _normalize_path(filename: _Path) -> str:
|
|
"""Normalize a file/dir name for comparison purposes"""
|
|
# See pkg_resources.normalize_path
|
|
file = os.path.abspath(filename) if sys.platform == 'cygwin' else filename
|
|
return os.path.normcase(os.path.realpath(os.path.normpath(file)))
|
|
|
|
|
|
def _empty_dir(dir_: _P) -> _P:
|
|
"""Create a directory ensured to be empty. Existing files may be removed."""
|
|
shutil.rmtree(dir_, ignore_errors=True)
|
|
os.makedirs(dir_)
|
|
return dir_
|
|
|
|
|
|
def _make_identifier(name: str) -> str:
|
|
"""Make a string safe to be used as Python identifier.
|
|
>>> _make_identifier("12abc")
|
|
'_12abc'
|
|
>>> _make_identifier("__editable__.myns.pkg-78.9.3_local")
|
|
'__editable___myns_pkg_78_9_3_local'
|
|
"""
|
|
safe = re.sub(r'\W|^(?=\d)', '_', name)
|
|
assert safe.isidentifier()
|
|
return safe
|
|
|
|
|
|
class _NamespaceInstaller(namespaces.Installer):
|
|
def __init__(self, distribution, installation_dir, editable_name, src_root):
|
|
self.distribution = distribution
|
|
self.src_root = src_root
|
|
self.installation_dir = installation_dir
|
|
self.editable_name = editable_name
|
|
self.outputs = []
|
|
self.dry_run = False
|
|
|
|
def _get_target(self):
|
|
"""Installation target."""
|
|
return os.path.join(self.installation_dir, self.editable_name)
|
|
|
|
def _get_root(self):
|
|
"""Where the modules/packages should be loaded from."""
|
|
return repr(str(self.src_root))
|
|
|
|
|
|
_FINDER_TEMPLATE = """\
|
|
import sys
|
|
from importlib.machinery import ModuleSpec
|
|
from importlib.machinery import all_suffixes as module_suffixes
|
|
from importlib.util import spec_from_file_location
|
|
from itertools import chain
|
|
from pathlib import Path
|
|
|
|
MAPPING = {mapping!r}
|
|
NAMESPACES = {namespaces!r}
|
|
PATH_PLACEHOLDER = {name!r} + ".__path_hook__"
|
|
|
|
|
|
class _EditableFinder: # MetaPathFinder
|
|
@classmethod
|
|
def find_spec(cls, fullname, path=None, target=None):
|
|
for pkg, pkg_path in reversed(list(MAPPING.items())):
|
|
if fullname == pkg or fullname.startswith(f"{{pkg}}."):
|
|
rest = fullname.replace(pkg, "", 1).strip(".").split(".")
|
|
return cls._find_spec(fullname, Path(pkg_path, *rest))
|
|
|
|
return None
|
|
|
|
@classmethod
|
|
def _find_spec(cls, fullname, candidate_path):
|
|
init = candidate_path / "__init__.py"
|
|
candidates = (candidate_path.with_suffix(x) for x in module_suffixes())
|
|
for candidate in chain([init], candidates):
|
|
if candidate.exists():
|
|
return spec_from_file_location(fullname, candidate)
|
|
|
|
|
|
class _EditableNamespaceFinder: # PathEntryFinder
|
|
@classmethod
|
|
def _path_hook(cls, path):
|
|
if path == PATH_PLACEHOLDER:
|
|
return cls
|
|
raise ImportError
|
|
|
|
@classmethod
|
|
def _paths(cls, fullname):
|
|
# Ensure __path__ is not empty for the spec to be considered a namespace.
|
|
return NAMESPACES[fullname] or MAPPING.get(fullname) or [PATH_PLACEHOLDER]
|
|
|
|
@classmethod
|
|
def find_spec(cls, fullname, target=None):
|
|
if fullname in NAMESPACES:
|
|
spec = ModuleSpec(fullname, None, is_package=True)
|
|
spec.submodule_search_locations = cls._paths(fullname)
|
|
return spec
|
|
return None
|
|
|
|
@classmethod
|
|
def find_module(cls, fullname):
|
|
return None
|
|
|
|
|
|
def install():
|
|
if not any(finder == _EditableFinder for finder in sys.meta_path):
|
|
sys.meta_path.append(_EditableFinder)
|
|
|
|
if not NAMESPACES:
|
|
return
|
|
|
|
if not any(hook == _EditableNamespaceFinder._path_hook for hook in sys.path_hooks):
|
|
# PathEntryFinder is needed to create NamespaceSpec without private APIS
|
|
sys.path_hooks.append(_EditableNamespaceFinder._path_hook)
|
|
if PATH_PLACEHOLDER not in sys.path:
|
|
sys.path.append(PATH_PLACEHOLDER) # Used just to trigger the path hook
|
|
"""
|
|
|
|
|
|
def _finder_template(
|
|
name: str, mapping: Mapping[str, str], namespaces: Dict[str, List[str]]
|
|
) -> str:
|
|
"""Create a string containing the code for the``MetaPathFinder`` and
|
|
``PathEntryFinder``.
|
|
"""
|
|
mapping = dict(sorted(mapping.items(), key=lambda p: p[0]))
|
|
return _FINDER_TEMPLATE.format(name=name, mapping=mapping, namespaces=namespaces)
|
|
|
|
|
|
class InformationOnly(UserWarning):
|
|
"""Currently there is no clear way of displaying messages to the users
|
|
that use the setuptools backend directly via ``pip``.
|
|
The only thing that might work is a warning, although it is not the
|
|
most appropriate tool for the job...
|
|
"""
|
|
|
|
|
|
class LinksNotSupported(errors.FileError):
|
|
"""File system does not seem to support either symlinks or hard links."""
|