Handle more file open/close with "with"

gitdb/db/ref.py

@@ -41,7 +41,8 @@ def _update_dbs_from_ref_file(self):
         # try to get as many as possible, don't fail if some are unavailable
         ref_paths = list()
         try:
-            ref_paths = [l.strip() for l in open(self._ref_file, 'r').readlines()]
+            with open(self._ref_file, 'r') as f:
+                ref_paths = [l.strip() for l in f]
         except (OSError, IOError):
             pass
         # END handle alternates

gitdb/test/db/test_ref.py

@@ -21,10 +21,9 @@ class TestReferenceDB(TestDBBase):
     def make_alt_file(self, alt_path, alt_list):
         """Create an alternates file which contains the given alternates.
         The list can be empty"""
-        alt_file = open(alt_path, "wb")
-        for alt in alt_list:
-            alt_file.write(alt.encode("utf-8") + "\n".encode("ascii"))
-        alt_file.close()
+        with open(alt_path, "wb") as alt_file:
+            for alt in alt_list:
+                alt_file.write(alt.encode("utf-8") + "\n".encode("ascii"))
 
     @with_rw_directory
     def test_writing(self, path):

gitdb/test/test_pack.py

@@ -197,7 +197,6 @@ def rewind_streams():
                 obj.stream.seek(0)
         # END utility
         for ppath, ipath, num_obj in zip((pack_path, ) * 2, (index_path, None), (len(pack_objs), None)):
-            pfile = open(ppath, 'wb')
             iwrite = None
             if ipath:
                 ifile = open(ipath, 'wb')
@@ -210,8 +209,8 @@ def rewind_streams():
             # END rewind streams
             iteration += 1
 
-            pack_sha, index_sha = PackEntity.write_pack(pack_objs, pfile.write, iwrite, object_count=num_obj)
-            pfile.close()
+            with open(ppath, 'wb') as pfile:
+                pack_sha, index_sha = PackEntity.write_pack(pack_objs, pfile.write, iwrite, object_count=num_obj)
             assert os.path.getsize(ppath) > 100
 
             # verify pack

gitdb/test/test_util.py

@@ -25,19 +25,15 @@ def test_basics(self):
     def _cmp_contents(self, file_path, data):
         # raise if data from file at file_path
         # does not match data string
-        fp = open(file_path, "rb")
-        try:
+        with open(file_path, "rb") as fp:
             assert fp.read() == data.encode("ascii")
-        finally:
-            fp.close()
 
     def test_lockedfd(self):
         my_file = tempfile.mktemp()
         orig_data = "hello"
         new_data = "world"
-        my_file_fp = open(my_file, "wb")
-        my_file_fp.write(orig_data.encode("ascii"))
-        my_file_fp.close()
+        with open(my_file, "wb") as my_file_fp:
+            my_file_fp.write(orig_data.encode("ascii"))
 
         try:
             lfd = LockedFD(my_file)