-from __future__ import print_function
+from __future__ import absolute_import, print_function
+from array import array
+from binascii import hexlify
from traceback import print_exception
-import sys
+import os, sys
+
+# Please see CODINGSTYLE for important exception handling guidelines
+# and the rationale behind add_ex_tb(), add_ex_ctx(), etc.
py_maj = sys.version_info[0]
py3 = py_maj >= 3
if py3:
+ from os import environb as environ
+
+ lc_ctype = environ.get(b'LC_CTYPE')
+ if lc_ctype and lc_ctype.lower() != b'iso-8859-1':
+ # Because of argv, options.py, pwd, grp, and any number of other issues
+ print('error: bup currently only works with ISO-8859-1, not LC_CTYPE=%s'
+ % lc_ctype.decode(),
+ file=sys.stderr)
+ print('error: this should already have been arranged, so indicates a bug',
+ file=sys.stderr)
+ sys.exit(2)
+
+ from os import fsencode
+ from shlex import quote
+ input = input
+ range = range
str_type = str
+ int_types = (int,)
+
+ def hexstr(b):
+ """Return hex string (not bytes as with hexlify) representation of b."""
+ return b.hex()
+
+ def reraise(ex):
+ raise ex.with_traceback(sys.exc_info()[2])
def add_ex_tb(ex):
"""Do nothing (already handled by Python 3 infrastructure)."""
return ex
- def chain_ex(ex, context_ex):
+ def add_ex_ctx(ex, context_ex):
+ """Do nothing (already handled by Python 3 infrastructure)."""
return ex
+ def items(x):
+ return x.items()
+
+ def argv_bytes(x):
+ """Return the original bytes passed to main() for an argv argument."""
+ return fsencode(x)
+
+ def bytes_from_uint(i):
+ return bytes((i,))
+
+ def bytes_from_byte(b): # python > 2: b[3] returns ord('x'), not b'x'
+ return bytes((b,))
+
+ byte_int = lambda x: x
+
+ def buffer(object, offset=None, size=None):
+ if size:
+ assert offset is not None
+ return memoryview(object)[offset:offset + size]
+ if offset:
+ return memoryview(object)[offset:]
+ return memoryview(object)
+
+ def join_bytes(*items):
+ """Return the concatenated bytes or memoryview arguments as bytes."""
+ return b''.join(items)
+
else: # Python 2
+ def fsencode(x):
+ return x
+
+ from pipes import quote
+ from os import environ
+
+ from bup.py2raise import reraise
+
+ input = raw_input
+ range = xrange
str_type = basestring
+ int_types = (int, long)
+
+ hexstr = hexlify
def add_ex_tb(ex):
"""Add a traceback to ex if it doesn't already have one. Return ex.
ex.__traceback__ = sys.exc_info()[2]
return ex
- def chain_ex(ex, context_ex):
+ def add_ex_ctx(ex, context_ex):
+ """Make context_ex the __context__ of ex (unless it already has one).
+ Return ex.
+
+ """
if context_ex:
- add_ex_tb(context_ex)
if not getattr(ex, '__context__', None):
ex.__context__ = context_ex
return ex
tb = getattr(ex, '__traceback__', None)
print_exception(type(ex), ex, tb)
+ def items(x):
+ return x.iteritems()
+
+ def argv_bytes(x):
+ """Return the original bytes passed to main() for an argv argument."""
+ return x
+
+ def bytes_from_uint(i):
+ return chr(i)
+
+ def bytes_from_byte(b):
+ return b
+
+ byte_int = ord
+
+ buffer = buffer
+
+ def join_bytes(x, y):
+ """Return the concatenated bytes or buffer arguments as bytes."""
+ if type(x) == buffer:
+ assert type(y) in (bytes, buffer)
+ return x + y
+ assert type(x) == bytes
+ if type(y) == bytes:
+ return b''.join((x, y))
+ assert type(y) in (bytes, buffer)
+ return buffer(x) + y
+
+
+def restore_lc_env():
+ # Once we're up and running with iso-8859-1, undo the bup-python
+ # LC_CTYPE hackery, so we don't affect unrelated subprocesses.
+ bup_lc_all = environ.get(b'BUP_LC_ALL')
+ if bup_lc_all:
+ del environ[b'LC_COLLATE']
+ del environ[b'LC_CTYPE']
+ del environ[b'LC_MONETARY']
+ del environ[b'LC_NUMERIC']
+ del environ[b'LC_TIME']
+ del environ[b'LC_MESSAGES']
+ del environ[b'LC_MESSAGES']
+ environ[b'LC_ALL'] = bup_lc_all
+ return
+ bup_lc_ctype = environ.get(b'BUP_LC_CTYPE')
+ if bup_lc_ctype:
+ environ[b'LC_CTYPE'] = bup_lc_ctype
+
def wrap_main(main):
"""Run main() and raise a SystemExit with the return value if it
returns, pass along any SystemExit it raises, convert
sys.exit(1)
-# Excepting wrap_main() in the traceback, these should produce the same output:
+# Excepting wrap_main() in the traceback, these should produce similar output:
# python2 lib/bup/compat.py
# python3 lib/bup/compat.py
# i.e.:
# diff -u <(python2 lib/bup/compat.py 2>&1) <(python3 lib/bup/compat.py 2>&1)
+#
+# Though the python3 output for 'second' will include a stacktrace
+# starting from wrap_main, rather than from outer().
if __name__ == '__main__':
try:
inner()
except Exception as ex:
- raise chain_ex(Exception('second'), ex)
+ add_ex_tb(ex)
+ try:
+ raise Exception('second')
+ except Exception as ex2:
+ raise add_ex_ctx(add_ex_tb(ex2), ex)
wrap_main(outer)
projects / bup.git / blobdiff