Ensure file resources are released

git/refs/symbolic.py

@@ -88,25 +88,25 @@ def _iter_packed_refs(cls, repo):
 """Returns an iterator yielding pairs of sha1/path pairs (as bytes) for the corresponding refs.
  :note: The packed refs file will be kept open as long as we iterate"""
 try:
-fp=open(cls._get_packed_refs_path(repo), 'rt')
-forlineinfp:
-line=line.strip()
-ifnotline:
-continue
-ifline.startswith('#'):
-ifline.startswith('# pack-refs with:') andnotline.endswith('peeled'):
-raiseTypeError("PackingType of packed-Refs not understood: %r"%line)
-# END abort if we do not understand the packing scheme
-continue
-# END parse comment
+withopen(cls._get_packed_refs_path(repo), 'rt')asfp:
+forlineinfp:
+line=line.strip()
+ifnotline:
+continue
+ifline.startswith('#'):
+ifline.startswith('# pack-refs with:') andnotline.endswith('peeled'):
+raiseTypeError("PackingType of packed-Refs not understood: %r"%line)
+# END abort if we do not understand the packing scheme
+continue
+# END parse comment
 
-# skip dereferenced tag object entries - previous line was actual
-# tag reference for it
-ifline[0] =='^':
-continue
+# skip dereferenced tag object entries - previous line was actual
+# tag reference for it
+ifline[0] =='^':
+continue
 
-yieldtuple(line.split(' ', 1))
-# END for each line
+yieldtuple(line.split(' ', 1))
+# END for each line
 except (OSError, IOError):
 raiseStopIteration
 # END no packed-refs file handling