Allow .egg-info files (i.e. not directories)

Author: Chris Billington

importlib_metadata/_hooks.py

@@ -18,6 +18,7 @@
     from pathlib2 import Path
 
     FileNotFoundError = IOError, OSError
+    NotADirectoryError = IOError, OSError
     __metaclass__ = type
 
 
@@ -84,8 +85,7 @@ def _search_path(cls, root, pattern):
         return (
             item
             for item in root.iterdir()
-            if item.is_dir()
-            and re.match(
+            if re.match(
                 cls.search_template.format(pattern=normalized),
                 str(item.name),
                 flags=re.IGNORECASE,
@@ -99,7 +99,7 @@ def __init__(self, path):
         self._path = path
 
     def read_text(self, filename):
-        with suppress(FileNotFoundError):
+        with suppress(FileNotFoundError, NotADirectoryError):
             with self._path.joinpath(filename).open(encoding='utf-8') as fp:
                 return fp.read()
         return None

importlib_metadata/api.py

@@ -195,7 +195,11 @@ def metadata(self):
         The returned object will have keys that name the various bits of
         metadata.  See PEP 566 for details.
         """
-        text = self.read_text('METADATA') or self.read_text('PKG-INFO')
+        text = (
+            self.read_text('METADATA')
+            or self.read_text('PKG-INFO')
+            or self.read_text('')
+            )
         return _email_message_from_string(text)
 
     @property
@@ -246,7 +250,7 @@ def _read_dist_info_reqs(self):
 
     def _read_egg_info_reqs(self):
         source = self.read_text('requires.txt')
-        return self._deps_from_requires_text(source)
+        return source and self._deps_from_requires_text(source)
 
     @classmethod
     def _deps_from_requires_text(cls, source):