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# encoding: utf-8
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"""sys.excepthook for IPython itself, leaves a detailed report on disk.
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Authors:
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* Fernando Perez
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* Brian E. Granger
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2001-2007 Fernando Perez. <fperez@colorado.edu>
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# Copyright (C) 2008-2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import sys
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import traceback
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from pprint import pformat
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from pathlib import Path
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from IPython.core import ultratb
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from IPython.core.release import author_email
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from IPython.utils.sysinfo import sys_info
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from IPython.utils.py3compat import input
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from IPython.core.release import __version__ as version
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from typing import Optional
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#-----------------------------------------------------------------------------
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# Code
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#-----------------------------------------------------------------------------
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# Template for the user message.
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_default_message_template = """\
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Oops, {app_name} crashed. We do our best to make it stable, but...
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A crash report was automatically generated with the following information:
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- A verbatim copy of the crash traceback.
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- A copy of your input history during this session.
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- Data on your current {app_name} configuration.
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It was left in the file named:
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\t'{crash_report_fname}'
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If you can email this file to the developers, the information in it will help
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them in understanding and correcting the problem.
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You can mail it to: {contact_name} at {contact_email}
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with the subject '{app_name} Crash Report'.
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If you want to do it now, the following command will work (under Unix):
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mail -s '{app_name} Crash Report' {contact_email} < {crash_report_fname}
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In your email, please also include information about:
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- The operating system under which the crash happened: Linux, macOS, Windows,
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other, and which exact version (for example: Ubuntu 16.04.3, macOS 10.13.2,
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Windows 10 Pro), and whether it is 32-bit or 64-bit;
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- How {app_name} was installed: using pip or conda, from GitHub, as part of
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a Docker container, or other, providing more detail if possible;
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- How to reproduce the crash: what exact sequence of instructions can one
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input to get the same crash? Ideally, find a minimal yet complete sequence
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of instructions that yields the crash.
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To ensure accurate tracking of this issue, please file a report about it at:
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{bug_tracker}
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"""
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_lite_message_template = """
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If you suspect this is an IPython {version} bug, please report it at:
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https://github.com/ipython/ipython/issues
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or send an email to the mailing list at {email}
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You can print a more detailed traceback right now with "%tb", or use "%debug"
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to interactively debug it.
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Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
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{config}Application.verbose_crash=True
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"""
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class CrashHandler(object):
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"""Customizable crash handlers for IPython applications.
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Instances of this class provide a :meth:`__call__` method which can be
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used as a ``sys.excepthook``. The :meth:`__call__` signature is::
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def __call__(self, etype, evalue, etb)
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"""
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message_template = _default_message_template
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section_sep = '\n\n'+'*'*75+'\n\n'
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def __init__(
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self,
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app,
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contact_name: Optional[str] = None,
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contact_email: Optional[str] = None,
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bug_tracker: Optional[str] = None,
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show_crash_traceback: bool = True,
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call_pdb: bool = False,
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):
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"""Create a new crash handler
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Parameters
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----------
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app : Application
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A running :class:`Application` instance, which will be queried at
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crash time for internal information.
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contact_name : str
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A string with the name of the person to contact.
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contact_email : str
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A string with the email address of the contact.
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bug_tracker : str
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A string with the URL for your project's bug tracker.
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show_crash_traceback : bool
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If false, don't print the crash traceback on stderr, only generate
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the on-disk report
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call_pdb
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Whether to call pdb on crash
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Attributes
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----------
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These instances contain some non-argument attributes which allow for
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further customization of the crash handler's behavior. Please see the
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source for further details.
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"""
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self.crash_report_fname = "Crash_report_%s.txt" % app.name
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self.app = app
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self.call_pdb = call_pdb
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#self.call_pdb = True # dbg
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self.show_crash_traceback = show_crash_traceback
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self.info = dict(app_name = app.name,
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contact_name = contact_name,
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contact_email = contact_email,
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bug_tracker = bug_tracker,
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crash_report_fname = self.crash_report_fname)
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def __call__(self, etype, evalue, etb):
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"""Handle an exception, call for compatible with sys.excepthook"""
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# do not allow the crash handler to be called twice without reinstalling it
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# this prevents unlikely errors in the crash handling from entering an
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# infinite loop.
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sys.excepthook = sys.__excepthook__
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# Report tracebacks shouldn't use color in general (safer for users)
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color_scheme = 'NoColor'
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# Use this ONLY for developer debugging (keep commented out for release)
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#color_scheme = 'Linux' # dbg
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try:
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rptdir = self.app.ipython_dir
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except:
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rptdir = Path.cwd()
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if rptdir is None or not Path.is_dir(rptdir):
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rptdir = Path.cwd()
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report_name = rptdir / self.crash_report_fname
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# write the report filename into the instance dict so it can get
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# properly expanded out in the user message template
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self.crash_report_fname = report_name
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self.info['crash_report_fname'] = report_name
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TBhandler = ultratb.VerboseTB(
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color_scheme=color_scheme,
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long_header=1,
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call_pdb=self.call_pdb,
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)
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if self.call_pdb:
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TBhandler(etype,evalue,etb)
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return
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else:
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traceback = TBhandler.text(etype,evalue,etb,context=31)
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# print traceback to screen
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if self.show_crash_traceback:
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print(traceback, file=sys.stderr)
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# and generate a complete report on disk
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try:
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report = open(report_name, "w", encoding="utf-8")
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except:
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print('Could not create crash report on disk.', file=sys.stderr)
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return
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with report:
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# Inform user on stderr of what happened
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print('\n'+'*'*70+'\n', file=sys.stderr)
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print(self.message_template.format(**self.info), file=sys.stderr)
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# Construct report on disk
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report.write(self.make_report(traceback))
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input("Hit <Enter> to quit (your terminal may close):")
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def make_report(self,traceback):
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"""Return a string containing a crash report."""
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sec_sep = self.section_sep
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report = ['*'*75+'\n\n'+'IPython post-mortem report\n\n']
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rpt_add = report.append
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rpt_add(sys_info())
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try:
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config = pformat(self.app.config)
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rpt_add(sec_sep)
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rpt_add('Application name: %s\n\n' % self.app_name)
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rpt_add('Current user configuration structure:\n\n')
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rpt_add(config)
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except:
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pass
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rpt_add(sec_sep+'Crash traceback:\n\n' + traceback)
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return ''.join(report)
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def crash_handler_lite(etype, evalue, tb):
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"""a light excepthook, adding a small message to the usual traceback"""
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traceback.print_exception(etype, evalue, tb)
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from IPython.core.interactiveshell import InteractiveShell
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if InteractiveShell.initialized():
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# we are in a Shell environment, give %magic example
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config = "%config "
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else:
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# we are not in a shell, show generic config
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config = "c."
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print(_lite_message_template.format(email=author_email, config=config, version=version), file=sys.stderr)
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