Ensure logging is configured even on older Setuptools versions.python-logging-compat

2 files changed, 31 insertions, 0 deletions

diff --git a/src/wheel/_setuptools_logging.py b/src/wheel/_setuptools_logging.py
new file mode 100644
index 0000000..70efa06
--- /dev/null
+++ b/src/wheel/_setuptools_logging.py
@@ -0,0 +1,23 @@
+# copied from setuptools.logging, omitting monkeypatching
+import sys
+import logging
+
+
+def _not_warning(record):
+    return record.levelno < logging.WARNING
+
+
+def configure():
+    """
+    Configure logging to emit warning and above to stderr
+    and everything else to stdout. This behavior is provided
+    for compatibilty with distutils.log but may change in
+    the future.
+    """
+    err_handler = logging.StreamHandler()
+    err_handler.setLevel(logging.WARNING)
+    out_handler = logging.StreamHandler(sys.stdout)
+    out_handler.addFilter(_not_warning)
+    handlers = err_handler, out_handler
+    logging.basicConfig(
+        format="{message}", style='{', handlers=handlers, level=logging.DEBUG)
diff --git a/src/wheel/util.py b/src/wheel/util.py
index af470b5..775433f 100644
--- a/src/wheel/util.py
+++ b/src/wheel/util.py
@@ -5,6 +5,14 @@ import logging
 
 log = logging.getLogger('wheel')
 
+# ensure Python logging is configured
+try:
+    __import__('setuptools.logging')
+except ImportError:
+    # setuptools < ??
+    from . import _setuptools_logging
+    _setuptools_logging.configure()
+
 
 def urlsafe_b64encode(data: bytes) -> bytes:
     """urlsafe_b64encode without padding"""