Merge pull request #1335 from themiwi/patch-1

Adds call to os.path.abspath() in pkg_resources.normalize_path() on Cygwin

changelog.d/1335.change.rst

+In ``pkg_resources.normalize_path``, fix issue on Cygwin when cwd contains symlinks.

pkg_resources/__init__.py

@@ -2228,7 +2228,18 @@ register_namespace_handler(object, null_ns_handler)
 
 def normalize_path(filename):
     """Normalize a file/dir name for comparison purposes"""
-    return os.path.normcase(os.path.realpath(filename))
+    return os.path.normcase(os.path.realpath(_cygwin_patch(filename)))
+
+
+def _cygwin_patch(filename):  # pragma: nocover
+    """
+    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
+    symlink components. Using
+    os.path.abspath() works around this limitation. A fix in os.getcwd()
+    would probably better, in Cygwin even more so, except
+    that this seems to be by design...
+    """
+    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
 
 
 def _normalize_cached(filename, _cache={}):