New upstream version 3.0.5upstream/3.0.5

1 files changed, 10 insertions, 6 deletions

diff --git a/engine/SCons/dblite.py b/engine/SCons/dblite.py
index 87a1763..14bd93d 100644
--- a/engine/SCons/dblite.py
+++ b/engine/SCons/dblite.py
@@ -75,7 +75,8 @@ class dblite(object):
 
     def __init__(self, file_base_name, flag, mode):
         assert flag in (None, "r", "w", "c", "n")
-        if (flag is None): flag = "r"
+        if flag is None:
+            flag = "r"
 
         base, ext = os.path.splitext(file_base_name)
         if ext == dblite_suffix:
@@ -106,17 +107,20 @@ class dblite(object):
             self._chown_to = -1  # don't chown
             self._chgrp_to = -1  # don't chgrp
 
-        if (self._flag == "n"):
-            self._open(self._file_name, "wb", self._mode)
+        if self._flag == "n":
+            with self._open(self._file_name, "wb", self._mode):
+                pass  # just make sure it exists
         else:
             try:
                 f = self._open(self._file_name, "rb")
             except IOError as e:
-                if (self._flag != "c"):
+                if self._flag != "c":
                     raise e
-                self._open(self._file_name, "wb", self._mode)
+                with self._open(self._file_name, "wb", self._mode):
+                    pass  # just make sure it exists
             else:
                 p = f.read()
+                f.close()
                 if len(p) > 0:
                     try:
                         if bytes is not str:
@@ -132,7 +136,7 @@ class dblite(object):
                             corruption_warning(self._file_name)
 
     def close(self):
-        if (self._needs_sync):
+        if self._needs_sync:
             self.sync()
 
     def __del__(self):