From patchwork Wed Apr 12 02:42:42 2017
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Subject: [1, of,
 2] windows: add context manager support to mixedfilemodewrapper
From: Matt Harbison <mharbison72@gmail.com>
X-Patchwork-Id: 20125
Message-Id: <ef3aa25da8e5b3137b91.1491964962@Envy>
To: mercurial-devel@mercurial-scm.org
Date: Tue, 11 Apr 2017 22:42:42 -0400

# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 1491961091 14400
#      Tue Apr 11 21:38:11 2017 -0400
# Node ID ef3aa25da8e5b3137b917e9a1756df7a7eac5c3a
# Parent  7b6f5632f09d85b96b2f986961576eb165d44cbf
windows: add context manager support to mixedfilemodewrapper

I stumbled into this in the next patch.  The difference between getting a
context manager capable object or not from vfs classes was as subtle as adding a
'+' to the file mode.

diff --git a/mercurial/windows.py b/mercurial/windows.py
--- a/mercurial/windows.py
+++ b/mercurial/windows.py
@@ -64,6 +64,12 @@
         object.__setattr__(self, r'_fp', fp)
         object.__setattr__(self, r'_lastop', 0)
 
+    def __enter__(self):
+        return self._fp.__enter__()
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self._fp.__exit__(exc_type, exc_val, exc_tb)
+
     def __getattr__(self, name):
         return getattr(self._fp, name)