更改enroll命名,添加了注释,向get_error_msg中添加了一些错误代码

venv/Lib/site-packages/pip/_internal/locations/__init__.py

@@ -38,34 +38,14 @@ __all__ = [
 
 logger = logging.getLogger(__name__)
 
+if os.environ.get("_PIP_LOCATIONS_NO_WARN_ON_MISMATCH"):
+    _MISMATCH_LEVEL = logging.DEBUG
+else:
+    _MISMATCH_LEVEL = logging.WARNING
 
 _PLATLIBDIR: str = getattr(sys, "platlibdir", "lib")
 
-_USE_SYSCONFIG_DEFAULT = sys.version_info >= (3, 10)
-
-
-def _should_use_sysconfig() -> bool:
-    """This function determines the value of _USE_SYSCONFIG.
-
-    By default, pip uses sysconfig on Python 3.10+.
-    But Python distributors can override this decision by setting:
-        sysconfig._PIP_USE_SYSCONFIG = True / False
-    Rationale in https://github.com/pypa/pip/issues/10647
-
-    This is a function for testability, but should be constant during any one
-    run.
-    """
-    return bool(getattr(sysconfig, "_PIP_USE_SYSCONFIG", _USE_SYSCONFIG_DEFAULT))
-
-
-_USE_SYSCONFIG = _should_use_sysconfig()
-
-# Be noisy about incompatibilities if this platforms "should" be using
-# sysconfig, but is explicitly opting out and using distutils instead.
-if _USE_SYSCONFIG_DEFAULT and not _USE_SYSCONFIG:
-    _MISMATCH_LEVEL = logging.WARNING
-else:
-    _MISMATCH_LEVEL = logging.DEBUG
+_USE_SYSCONFIG = sys.version_info >= (3, 10)
 
 
 def _looks_like_bpo_44860() -> bool:
@@ -84,8 +64,8 @@ def _looks_like_bpo_44860() -> bool:
 
 def _looks_like_red_hat_patched_platlib_purelib(scheme: Dict[str, str]) -> bool:
     platlib = scheme["platlib"]
-    if "/$platlibdir/" in platlib:
-        platlib = platlib.replace("/$platlibdir/", f"/{_PLATLIBDIR}/")
+    if "/$platlibdir/" in platlib and hasattr(sys, "platlibdir"):
+        platlib = platlib.replace("/$platlibdir/", f"/{sys.platlibdir}/")
     if "/lib64/" not in platlib:
         return False
     unpatched = platlib.replace("/lib64/", "/lib/")
@@ -135,22 +115,6 @@ def _looks_like_red_hat_scheme() -> bool:
     )
 
 
-@functools.lru_cache(maxsize=None)
-def _looks_like_slackware_scheme() -> bool:
-    """Slackware patches sysconfig but fails to patch distutils and site.
-
-    Slackware changes sysconfig's user scheme to use ``"lib64"`` for the lib
-    path, but does not do the same to the site module.
-    """
-    if user_site is None:  # User-site not available.
-        return False
-    try:
-        paths = sysconfig.get_paths(scheme="posix_user", expand=False)
-    except KeyError:  # User-site not available.
-        return False
-    return "/lib64/" in paths["purelib"] and "/lib64/" not in user_site
-
-
 @functools.lru_cache(maxsize=None)
 def _looks_like_msys2_mingw_scheme() -> bool:
     """MSYS2 patches distutils and sysconfig to use a UNIX-like scheme.
@@ -306,17 +270,6 @@ def get_scheme(
         if skip_bpo_44860:
             continue
 
-        # Slackware incorrectly patches posix_user to use lib64 instead of lib,
-        # but not usersite to match the location.
-        skip_slackware_user_scheme = (
-            user
-            and k in ("platlib", "purelib")
-            and not WINDOWS
-            and _looks_like_slackware_scheme()
-        )
-        if skip_slackware_user_scheme:
-            continue
-
         # Both Debian and Red Hat patch Python to place the system site under
         # /usr/local instead of /usr. Debian also places lib in dist-packages
         # instead of site-packages, but the /usr/local check should cover it.
@@ -467,13 +420,6 @@ def _deduplicated(v1: str, v2: str) -> List[str]:
     return [v1, v2]
 
 
-def _looks_like_apple_library(path: str) -> bool:
-    """Apple patches sysconfig to *always* look under */Library/Python*."""
-    if sys.platform[:6] != "darwin":
-        return False
-    return path == f"/Library/Python/{get_major_minor_version()}/site-packages"
-
-
 def get_prefixed_libs(prefix: str) -> List[str]:
     """Return the lib locations under ``prefix``."""
     new_pure, new_plat = _sysconfig.get_prefixed_libs(prefix)
@@ -481,26 +427,6 @@ def get_prefixed_libs(prefix: str) -> List[str]:
         return _deduplicated(new_pure, new_plat)
 
     old_pure, old_plat = _distutils.get_prefixed_libs(prefix)
-    old_lib_paths = _deduplicated(old_pure, old_plat)
-
-    # Apple's Python (shipped with Xcode and Command Line Tools) hard-code
-    # platlib and purelib to '/Library/Python/X.Y/site-packages'. This will
-    # cause serious build isolation bugs when Apple starts shipping 3.10 because
-    # pip will install build backends to the wrong location. This tells users
-    # who is at fault so Apple may notice it and fix the issue in time.
-    if all(_looks_like_apple_library(p) for p in old_lib_paths):
-        deprecated(
-            reason=(
-                "Python distributed by Apple's Command Line Tools incorrectly "
-                "patches sysconfig to always point to '/Library/Python'. This "
-                "will cause build isolation to operate incorrectly on Python "
-                "3.10 or later. Please help report this to Apple so they can "
-                "fix this. https://developer.apple.com/bug-reporting/"
-            ),
-            replacement=None,
-            gone_in=None,
-        )
-        return old_lib_paths
 
     warned = [
         _warn_if_mismatch(
@@ -517,4 +443,4 @@ def get_prefixed_libs(prefix: str) -> List[str]:
     if any(warned):
         _log_context(prefix=prefix)
 
-    return old_lib_paths
+    return _deduplicated(old_pure, old_plat)