Remove the experimental fast-deps feature

src/pip/_internal/cli/cmdoptions.py

@@ -1009,7 +1009,6 @@ def check_list_path_option(options: Values) -> None:
     default=[],
     choices=[
         "2020-resolver",
-        "fast-deps",
         "truststore",
         "no-binary-enable-wheel-cache",
     ],

src/pip/_internal/cli/req_command.py

@@ -287,24 +287,6 @@ def make_requirement_preparer(
         temp_build_dir_path = temp_build_dir.path
         assert temp_build_dir_path is not None
 
-        resolver_variant = cls.determine_resolver_variant(options)
-        if resolver_variant == "2020-resolver":
-            lazy_wheel = "fast-deps" in options.features_enabled
-            if lazy_wheel:
-                logger.warning(
-                    "pip is using lazily downloaded wheels using HTTP "
-                    "range requests to obtain dependency information. "
-                    "This experimental feature is enabled through "
-                    "--use-feature=fast-deps and it is not ready for "
-                    "production."
-                )
-        else:
-            lazy_wheel = False
-            if "fast-deps" in options.features_enabled:
-                logger.warning(
-                    "fast-deps has no effect when used with the legacy resolver."
-                )
-
         return RequirementPreparer(
             build_dir=temp_build_dir_path,
             src_dir=options.src_dir,
@@ -317,7 +299,6 @@ def make_requirement_preparer(
             finder=finder,
             require_hashes=options.require_hashes,
             use_user_site=use_user_site,
-            lazy_wheel=lazy_wheel,
             verbosity=verbosity,
         )
 

src/pip/_internal/operations/prepare.py

@@ -10,8 +10,6 @@
 import shutil
 from typing import Dict, Iterable, List, Optional
 
-from pip._vendor.packaging.utils import canonicalize_name
-
 from pip._internal.distributions import make_distribution_for_install_requirement
 from pip._internal.distributions.installed import InstalledDistribution
 from pip._internal.exceptions import (
@@ -28,12 +26,7 @@
 from pip._internal.metadata import BaseDistribution, get_metadata_distribution
 from pip._internal.models.direct_url import ArchiveInfo
 from pip._internal.models.link import Link
-from pip._internal.models.wheel import Wheel
 from pip._internal.network.download import BatchDownloader, Downloader
-from pip._internal.network.lazy_wheel import (
-    HTTPRangeRequestUnsupported,
-    dist_from_wheel_url,
-)
 from pip._internal.network.session import PipSession
 from pip._internal.operations.build.build_tracker import BuildTracker
 from pip._internal.req.req_install import InstallRequirement
@@ -220,7 +213,6 @@ def __init__(
         finder: PackageFinder,
         require_hashes: bool,
         use_user_site: bool,
-        lazy_wheel: bool,
         verbosity: int,
     ) -> None:
         super().__init__()
@@ -249,9 +241,6 @@ def __init__(
         # Should install in user site-packages?
         self.use_user_site = use_user_site
 
-        # Should wheels be downloaded lazily?
-        self.use_lazy_wheel = lazy_wheel
-
         # How verbose should underlying tooling be?
         self.verbosity = verbosity
 
@@ -356,10 +345,7 @@ def _fetch_metadata_only(
                 "Metadata-only fetching is not used as hash checking is required",
             )
             return None
-        # Try PEP 658 metadata first, then fall back to lazy wheel if unavailable.
-        return self._fetch_metadata_using_link_data_attr(
-            req
-        ) or self._fetch_metadata_using_lazy_wheel(req.link)
+        return self._fetch_metadata_using_link_data_attr(req)
 
     def _fetch_metadata_using_link_data_attr(
         self,
@@ -402,35 +388,6 @@ def _fetch_metadata_using_link_data_attr(
             )
         return metadata_dist
 
-    def _fetch_metadata_using_lazy_wheel(
-        self,
-        link: Link,
-    ) -> Optional[BaseDistribution]:
-        """Fetch metadata using lazy wheel, if possible."""
-        # --use-feature=fast-deps must be provided.
-        if not self.use_lazy_wheel:
-            return None
-        if link.is_file or not link.is_wheel:
-            logger.debug(
-                "Lazy wheel is not used as %r does not point to a remote wheel",
-                link,
-            )
-            return None
-
-        wheel = Wheel(link.filename)
-        name = canonicalize_name(wheel.name)
-        logger.info(
-            "Obtaining dependency information from %s %s",
-            name,
-            wheel.version,
-        )
-        url = link.url.split("#", 1)[0]
-        try:
-            return dist_from_wheel_url(name, url, self._session)
-        except HTTPRangeRequestUnsupported:
-            logger.debug("%s does not support range requests", url)
-            return None
-
     def _complete_partial_requirements(
         self,
         partially_downloaded_reqs: Iterable[InstallRequirement],

tests/data/src/simplewheel-1.0/build/lib/simplewheel/__init__.py

@@ -0,0 +1 @@
+__version__ = "1.0"