# HG changeset patch
# User Bryan O'Sullivan <bryano@fb.com>
# Date 2016-01-12 22:49:35
# Node ID 4d10600c3f08880902707eaea5ca961a6d770aae
# Parent  47ac135113ec944826db6e76b7b8af76e4a166e1

util: simplify file I/O functions using context managers

diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -1445,25 +1445,16 @@ def ensuredirs(name, mode=None, notindex
         os.chmod(name, mode)
 
 def readfile(path):
-    fp = open(path, 'rb')
-    try:
+    with open(path, 'rb') as fp:
         return fp.read()
-    finally:
-        fp.close()
 
 def writefile(path, text):
-    fp = open(path, 'wb')
-    try:
+    with open(path, 'wb') as fp:
         fp.write(text)
-    finally:
-        fp.close()
 
 def appendfile(path, text):
-    fp = open(path, 'ab')
-    try:
+    with open(path, 'ab') as fp:
         fp.write(text)
-    finally:
-        fp.close()
 
 class chunkbuffer(object):
     """Allow arbitrary sized chunks of data to be efficiently read from an