1 files changed, 95 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/dns/_features.py b/.venv/lib/python3.12/site-packages/dns/_features.py
new file mode 100644
index 00000000..fa6d4955
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/dns/_features.py
@@ -0,0 +1,95 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+import importlib.metadata
+import itertools
+import string
+from typing import Dict, List, Tuple
+
+
+def _tuple_from_text(version: str) -> Tuple:
+    text_parts = version.split(".")
+    int_parts = []
+    for text_part in text_parts:
+        digit_prefix = "".join(
+            itertools.takewhile(lambda x: x in string.digits, text_part)
+        )
+        try:
+            int_parts.append(int(digit_prefix))
+        except Exception:
+            break
+    return tuple(int_parts)
+
+
+def _version_check(
+    requirement: str,
+) -> bool:
+    """Is the requirement fulfilled?
+
+    The requirement must be of the form
+
+        package>=version
+    """
+    package, minimum = requirement.split(">=")
+    try:
+        version = importlib.metadata.version(package)
+        # This shouldn't happen, but it apparently can.
+        if version is None:
+            return False
+    except Exception:
+        return False
+    t_version = _tuple_from_text(version)
+    t_minimum = _tuple_from_text(minimum)
+    if t_version < t_minimum:
+        return False
+    return True
+
+
+_cache: Dict[str, bool] = {}
+
+
+def have(feature: str) -> bool:
+    """Is *feature* available?
+
+    This tests if all optional packages needed for the
+    feature are available and recent enough.
+
+    Returns ``True`` if the feature is available,
+    and ``False`` if it is not or if metadata is
+    missing.
+    """
+    value = _cache.get(feature)
+    if value is not None:
+        return value
+    requirements = _requirements.get(feature)
+    if requirements is None:
+        # we make a cache entry here for consistency not performance
+        _cache[feature] = False
+        return False
+    ok = True
+    for requirement in requirements:
+        if not _version_check(requirement):
+            ok = False
+            break
+    _cache[feature] = ok
+    return ok
+
+
+def force(feature: str, enabled: bool) -> None:
+    """Force the status of *feature* to be *enabled*.
+
+    This method is provided as a workaround for any cases
+    where importlib.metadata is ineffective, or for testing.
+    """
+    _cache[feature] = enabled
+
+
+_requirements: Dict[str, List[str]] = {
+    ### BEGIN generated requirements
+    "dnssec": ["cryptography>=43"],
+    "doh": ["httpcore>=1.0.0", "httpx>=0.26.0", "h2>=4.1.0"],
+    "doq": ["aioquic>=1.0.0"],
+    "idna": ["idna>=3.7"],
+    "trio": ["trio>=0.23"],
+    "wmi": ["wmi>=1.5.1"],
+    ### END generated requirements
+}