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File Name : wheel_builder.py

"""Orchestrator for building wheels from InstallRequirements."""

from __future__ import annotations

import logging
import os.path
import re
from collections.abc import Iterable
from tempfile import TemporaryDirectory

from pip._vendor.packaging.utils import canonicalize_name, canonicalize_version
from pip._vendor.packaging.version import InvalidVersion, Version

from pip._internal.cache import WheelCache
from pip._internal.exceptions import InvalidWheelFilename, UnsupportedWheel
from pip._internal.metadata import FilesystemWheel, get_wheel_distribution
from pip._internal.models.link import Link
from pip._internal.models.wheel import Wheel
from pip._internal.operations.build.wheel import build_wheel_pep517
from pip._internal.operations.build.wheel_editable import build_wheel_editable
from pip._internal.req.req_install import InstallRequirement
from pip._internal.utils.logging import indent_log
from pip._internal.utils.misc import ensure_dir, hash_file
from pip._internal.utils.urls import path_to_url
from pip._internal.vcs import vcs

logger = logging.getLogger(__name__)

_egg_info_re = re.compile(r"([a-z0-9_.]+)-([a-z0-9_.!+-]+)", re.IGNORECASE)

BuildResult = tuple[list[InstallRequirement], list[InstallRequirement]]

def _contains_egg_info(s: str) -> bool:
    """Determine whether the string looks like an egg_info.

:param s: The string to parse. E.g. foo-2.1
    """
    return bool(_egg_info_re.search(s))

def _should_cache(
    req: InstallRequirement,
) -> bool | None:
    """
    Return whether a built InstallRequirement can be stored in the persistent
    wheel cache, assuming the wheel cache is available.
    """
    if req.editable or not req.source_dir:
        # never cache editable requirements
        return False

if req.link and req.link.is_vcs:
        # VCS checkout. Do not cache
        # unless it points to an immutable commit hash.
        assert not req.editable
        assert req.source_dir
        vcs_backend = vcs.get_backend_for_scheme(req.link.scheme)
        assert vcs_backend
        if vcs_backend.is_immutable_rev_checkout(req.link.url, req.source_dir):
            return True
        return False

assert req.link
    base, ext = req.link.splitext()
    if _contains_egg_info(base):
        return True

# Otherwise, do not cache.
    return False

def _get_cache_dir(
    req: InstallRequirement,
    wheel_cache: WheelCache,
) -> str:
    """Return the persistent or temporary cache directory where the built
    wheel need to be stored.
    """
    cache_available = bool(wheel_cache.cache_dir)
    assert req.link
    if cache_available and _should_cache(req):
        cache_dir = wheel_cache.get_path_for_link(req.link)
    else:
        cache_dir = wheel_cache.get_ephem_path_for_link(req.link)
    return cache_dir

def _verify_one(req: InstallRequirement, wheel_path: str) -> None:
    canonical_name = canonicalize_name(req.name or "")
    w = Wheel(os.path.basename(wheel_path))
    if w.name != canonical_name:
        raise InvalidWheelFilename(
            f"Wheel has unexpected file name: expected {canonical_name!r}, "
            f"got {w.name!r}",
        )
    dist = get_wheel_distribution(FilesystemWheel(wheel_path), canonical_name)
    dist_verstr = str(dist.version)
    if canonicalize_version(dist_verstr) != canonicalize_version(w.version):
        raise InvalidWheelFilename(
            f"Wheel has unexpected file name: expected {dist_verstr!r}, "
            f"got {w.version!r}",
        )
    metadata_version_value = dist.metadata_version
    if metadata_version_value is None:
        raise UnsupportedWheel("Missing Metadata-Version")
    try:
        metadata_version = Version(metadata_version_value)
    except InvalidVersion:
        msg = f"Invalid Metadata-Version: {metadata_version_value}"
        raise UnsupportedWheel(msg)
    if metadata_version >= Version("1.2") and not isinstance(dist.version, Version):
        raise UnsupportedWheel(
            f"Metadata 1.2 mandates PEP 440 version, but {dist_verstr!r} is not"
        )

def _build_one(
    req: InstallRequirement,
    output_dir: str,
    verify: bool,
    editable: bool,
) -> str | None:
    """Build one wheel.

:return: The filename of the built wheel, or None if the build failed.
    """
    artifact = "editable" if editable else "wheel"
    try:
        ensure_dir(output_dir)
    except OSError as e:
        logger.warning(
            "Building %s for %s failed: %s",
            artifact,
            req.name,
            e,
        )
        return None

# Install build deps into temporary directory (PEP 518)
    with req.build_env:
        wheel_path = _build_one_inside_env(req, output_dir, editable)
    if wheel_path and verify:
        try:
            _verify_one(req, wheel_path)
        except (InvalidWheelFilename, UnsupportedWheel) as e:
            logger.warning("Built %s for %s is invalid: %s", artifact, req.name, e)
            return None
    return wheel_path

def _build_one_inside_env(
    req: InstallRequirement,
    output_dir: str,
    editable: bool,
) -> str | None:
    with TemporaryDirectory(dir=output_dir) as wheel_directory:
        assert req.name
        assert req.metadata_directory
        assert req.pep517_backend
        if editable:
            wheel_path = build_wheel_editable(
                name=req.name,
                backend=req.pep517_backend,
                metadata_directory=req.metadata_directory,
                wheel_directory=wheel_directory,
            )
        else:
            wheel_path = build_wheel_pep517(
                name=req.name,
                backend=req.pep517_backend,
                metadata_directory=req.metadata_directory,
                wheel_directory=wheel_directory,
            )

if wheel_path is not None:
            wheel_name = os.path.basename(wheel_path)
            dest_path = os.path.join(output_dir, wheel_name)
            try:
                wheel_hash, length = hash_file(wheel_path)
                # We can do a replace here because wheel_path is guaranteed to
                # be in the same filesystem as output_dir. This will perform an
                # atomic rename, which is necessary to avoid concurrency issues
                # when populating the cache.
                os.replace(wheel_path, dest_path)
                logger.info(
                    "Created wheel for %s: filename=%s size=%d sha256=%s",
                    req.name,
                    wheel_name,
                    length,
                    wheel_hash.hexdigest(),
                )
                logger.info("Stored in directory: %s", output_dir)
                return dest_path
            except Exception as e:
                logger.warning(
                    "Building wheel for %s failed: %s",
                    req.name,
                    e,
                )
        return None

def build(
    requirements: Iterable[InstallRequirement],
    wheel_cache: WheelCache,
    verify: bool,
) -> BuildResult:
    """Build wheels.

:return: The list of InstallRequirement that succeeded to build and
        the list of InstallRequirement that failed to build.
    """
    if not requirements:
        return [], []

# Build the wheels.
    logger.info(
        "Building wheels for collected packages: %s",
        ", ".join(req.name for req in requirements),  # type: ignore
    )

with indent_log():
        build_successes, build_failures = [], []
        for req in requirements:
            assert req.name
            cache_dir = _get_cache_dir(req, wheel_cache)
            wheel_file = _build_one(
                req,
                cache_dir,
                verify,
                req.editable and req.permit_editable_wheels,
            )
            if wheel_file:
                # Record the download origin in the cache
                if req.download_info is not None:
                    # download_info is guaranteed to be set because when we build an
                    # InstallRequirement it has been through the preparer before, but
                    # let's be cautious.
                    wheel_cache.record_download_origin(cache_dir, req.download_info)
                # Update the link for this.
                req.link = Link(path_to_url(wheel_file))
                req.local_file_path = req.link.file_path
                assert req.link.is_wheel
                build_successes.append(req)
            else:
                build_failures.append(req)

# notify success/failure
    if build_successes:
        logger.info(
            "Successfully built %s",
            " ".join([req.name for req in build_successes]),  # type: ignore
        )
    if build_failures:
        logger.info(
            "Failed to build %s",
            " ".join([req.name for req in build_failures]),  # type: ignore
        )
    # Return a list of requirements that failed to build
    return build_successes, build_failures

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-12-03 11:32:24
..	dir	-	root/root	0755	2025-12-03 11:32:24
__pycache__	dir	-	root/root	0755	2025-12-03 11:32:24
cli	dir	-	root/root	0755	2025-12-03 11:32:24
commands	dir	-	root/root	0755	2025-12-03 11:32:24
distributions	dir	-	root/root	0755	2025-12-03 11:32:24
index	dir	-	root/root	0755	2025-12-03 11:32:24
locations	dir	-	root/root	0755	2025-12-03 11:32:24
metadata	dir	-	root/root	0755	2025-12-03 11:32:24
models	dir	-	root/root	0755	2025-12-03 11:32:24
network	dir	-	root/root	0755	2025-12-03 11:32:24
operations	dir	-	root/root	0755	2025-12-03 11:32:24
req	dir	-	root/root	0755	2025-12-03 11:32:24
resolution	dir	-	root/root	0755	2025-12-03 11:32:24
utils	dir	-	root/root	0755	2025-12-03 11:32:24
vcs	dir	-	root/root	0755	2025-12-03 11:32:24
__init__.py	text/x-script.python	511 B	root/root	0755	2025-12-03 11:32:24
build_env.py	text/plain	13.87 KB	root/root	0644	2025-12-03 11:32:24
cache.py	text/plain	10.1 KB	root/root	0644	2025-12-03 11:32:24
configuration.py	text/plain	14.23 KB	root/root	0644	2025-12-03 11:32:24
exceptions.py	text/plain	28.9 KB	root/root	0644	2025-12-03 11:32:24
main.py	text/x-script.python	338 B	root/root	0644	2025-12-03 11:32:24
pyproject.py	text/x-script.python	4.45 KB	root/root	0644	2025-12-03 11:32:24
self_outdated_check.py	text/x-script.python	8.27 KB	root/root	0644	2025-12-03 11:32:24
wheel_builder.py	text/plain	8.8 KB	root/root	0644	2025-12-03 11:32:24