Merge branch 'main' into stdlib

conda_smithy/linter/hints.py

@@ -181,6 +181,13 @@ def hint_check_spdx(about_section, hints):
 
 
 def hint_pip_no_build_backend(host_or_build_section, package_name, hints):
+    # we do NOT exclude all build backends since some of them
+    # need another backend to bootstrap
+    # the list below are the ones that self-bootstrap without
+    # another build backend
+    if package_name in ["pdm-backend", "setuptools"]:
+        return
+
     if host_or_build_section and any(
         req.split(" ")[0] == "pip" for req in host_or_build_section
     ):

conda_smithy/linter/utils.py

@@ -2,6 +2,7 @@
 import os
 import re
 import sys
+import time
 from collections.abc import Sequence
 from functools import lru_cache
 from glob import glob
@@ -208,8 +209,15 @@ def _lint_package_version(version: Optional[str]) -> Optional[str]:
         return invalid_version.format(ver=ver, err=e)
 
 
-@lru_cache(maxsize=1)
 def load_linter_toml_metdata():
+    # ensure we refresh the cache every hour
+    ttl = 3600
+    time_salt = int(time.time() / ttl)
+    return load_linter_toml_metdata_internal(time_salt)
+
+
+@lru_cache(maxsize=1)
+def load_linter_toml_metdata_internal(time_salt):
     hints_toml_url = "https://raw.githubusercontent.com/conda-forge/conda-forge-pinning-feedstock/main/recipe/linter_hints/hints.toml"
     hints_toml_req = requests.get(hints_toml_url)
     if hints_toml_req.status_code != 200:

news/2046-pip-hint-exclude.rst

@@ -0,0 +1,23 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* Fixed error where some python build backends were flagged as not having a backend. (#2046)
+
+**Security:**
+
+* <news item>