Fix translation of pywintypes.error on py3

src/calibre/utils/lock.py

@@ -14,6 +14,7 @@ from calibre.constants import (
     __appname__, fcntl, filesystem_encoding, islinux, isosx, iswindows, plugins
 )
 from calibre.utils.monotonic import monotonic
+from calibre.utils.shared_file import raise_winerror
 
 speedup = plugins['speedup'][0]
 if iswindows:
@@ -61,7 +62,7 @@ def windows_open(path):
             None,  # No template file
         )
     except pywintypes.error as err:
-        raise WindowsError(err[0], err[2], path)
+        raise_winerror(err)
     fd = msvcrt.open_osfhandle(h.Detach(), 0)
     return os.fdopen(fd, 'r+b')
 

src/calibre/utils/shared_file.py

@@ -70,12 +70,14 @@ if iswindows:
         os.O_CREAT | os.O_TRUNC             : CREATE_ALWAYS
     }
 
-    def raise_winerror(pywinerr):
+    def raise_winerror(pywinerr, path=None):
         reraise(
-            WindowsError,
-            WindowsError(pywinerr.winerror,
-                         (pywinerr.funcname or '') + ': ' + (pywinerr.strerror or '')),
-            sys.exc_info()[2])
+            WindowsError, WindowsError(
+                pywinerr.winerror,
+                (pywinerr.funcname or '') + ': ' + (pywinerr.strerror or ''), path
+            ),
+            sys.exc_info()[2]
+        )
 
     def os_open(path, flags, mode=0o777, share_flags=FILE_SHARE_VALID_FLAGS):
         '''
@@ -114,7 +116,7 @@ if iswindows:
             h = win32file.CreateFileW(
                 path, access_flags, share_flags, None, create_flags, attrib_flags, None)
         except pywintypes.error as e:
-            raise_winerror(e)
+            raise_winerror(e, path)
         ans = msvcrt.open_osfhandle(h.Detach(), flags | os.O_NOINHERIT)
         return ans
 

src/calibre/utils/test_lock.py

@@ -191,6 +191,10 @@ def find_tests():
     return unittest.defaultTestLoader.loadTestsFromTestCase(IPCLockTest)
 
 
+def run_tests():
+    from calibre.utils.run_tests import run_tests
+    run_tests(find_tests)
+
+
 if __name__ == '__main__':
-    suite = find_tests()
-    unittest.TextTestRunner(verbosity=4).run(suite)
+    run_tests()