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""" XMLError handling module """
from bzrlib.lazy_import import lazy_import
lazy_import(globals(), """
from bzrlib import (
errors,
osutils,
trace,
)
""")
from writer import _escape_cdata
class XMLError(errors.BzrError):
""" A class that wraps an BzrError and 'serialize' it as xml."""
internal_error = False
def __init__(self, error):
self.error = error
def __str__(self):
"""__str__"""
xml = '<?xml version="1.0" encoding="%s"?>' % \
osutils.get_user_encoding()
try:
xml += '<error>%s</error>' % self.get_cause_xml()
except Exception, e:
xml += '<error><message>%s</message></error>' % \
_escape_cdata(str(e))
return xml
def get_cause_xml(self):
"""return the cause as an xml string: class, dict and message"""
s = '<class>%s</class><dict>%s</dict>' \
'<message>%s</message>' \
% (self.error.__class__.__name__,
self._get_dict_as_xml(self.error.__dict__),
_escape_cdata(str(self.error)))
return s
def _get_dict_as_xml(self, dict):
"""returns a dict as xml using <key> and <value> tags"""
return ''.join(['<key>%s</key><value>%s</value>' % \
(_escape_cdata(key),
_escape_cdata(str(val))) \
for key, val in dict.iteritems() if val is not None])
def report_exception(exc_info, err_file):
""" replace the default report_exception with a custom one that returns
a xml representation of the error.
:return: The appropriate exit code for this error.
"""
exc_type, exc_object, exc_tb = exc_info
# Log the full traceback to ~/.bzr.log
trace.log_exception_quietly()
err_file.write(str(XMLError(exc_object)))
return errors.EXIT_ERROR
def handle_error_xml(func):
""" a decorator that handle errors using our custom report_exception"""
def xml_error_handling(*args, **kwargs):
""" the wrapper"""
try:
return func(*args, **kwargs)
except:
import sys, os
exitcode = report_exception(sys.exc_info(), sys.stderr)
if os.environ.get('BZR_PDB'):
print '**** entering debugger'
import pdb
pdb.post_mortem(sys.exc_traceback)
return exitcode
return xml_error_handling
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