Rely on zc.lockfile 2.0 with the new SimpleLockFile so that _fp is unwritten.

Author: jaraco

pytest_services/locks.py

@@ -8,6 +8,7 @@
 import time
 
 import pytest
+import zc.lockfile
 
 marker = object()
 
@@ -53,7 +54,7 @@ def file_lock(filename, remove=True, timeout=20):
     :param filename: the name of the file that will be locked.
 
     """
-    with contextlib.closing(zc.lockfile.LockFile(filename)) as lockfile:
+    with contextlib.closing(zc.lockfile.SimpleLockFile(filename)) as lockfile:
         yield lockfile._fp
 
 

setup.py

@@ -19,7 +19,7 @@
     'requests',
     'psutil',
     'pytest',
-    'zc.lockfile',
+    'zc.lockfile >= 2.0',
 ]
 
 PY2 = sys.version_info[0] < 3