+ class ExitStack:
+ def __init__(self):
+ self.contexts = []
+
+ def __enter__(self):
+ return self
+
+ def __exit__(self, value_type, value, traceback):
+ init_value = value
+ for ctx in reversed(self.contexts):
+ try:
+ ctx.__exit__(value_type, value, traceback)
+ except BaseException as ex:
+ add_ex_tb(ex)
+ if value:
+ add_ex_ctx(ex, value)
+ value_type = type(ex)
+ value = ex
+ traceback = ex.__traceback__
+ if value is not init_value:
+ raise value
+
+ def enter_context(self, x):
+ self.contexts.append(x)
+
+ def items(x):
+ return x.iteritems()
+
+ def argv_bytes(x):
+ """Return the original bytes passed to main() for an argv argument."""
+ return x
+
+ bytes_from_uint = chr
+
+ def bytes_from_byte(b):
+ return b
+
+ byte_int = ord
+
+ buffer = buffer
+
+try:
+ import bup_main
+except ModuleNotFoundError:
+ bup_main = None
+
+if bup_main:
+ def get_argvb():
+ "Return a new list containing the current process argv bytes."
+ return bup_main.argv()
+ if py3:
+ def get_argv():
+ "Return a new list containing the current process argv strings."
+ return [x.decode(errors='surrogateescape') for x in bup_main.argv()]
+ else:
+ def get_argv():
+ return bup_main.argv()
+else:
+ def get_argvb():
+ raise Exception('get_argvb requires the bup_main module');
+ def get_argv():
+ raise Exception('get_argv requires the bup_main module');
+