annotate tests/logexceptions.py @ 39016:39b8277e2115

changegroup: differentiate between fulltext and diff based deltas

Previously, revisiondelta encoded a delta and an optional prefix
containing a delta header. The underlying code could populate
the delta with either a real delta or a fulltext revision.

Following the theme of wanting to defer serialization of revision
data to the changegroup format as long as possible, it seems
prudent for the revision delta instance to capture what type of
data is being represented. This could possibly allow us to
encode revision data differently in the future. But for the
short term, it makes the behavior of a revisiondelta more
explicit.

Differential Revision: https://phab.mercurial-scm.org/D4213

# logexceptions.py - Write files containing info about Mercurial exceptions
#
# Copyright 2017 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

import inspect
import os
import sys
import traceback
import uuid

from mercurial import (
    dispatch,
    extensions,
)

def handleexception(orig, ui):
    res = orig(ui)

    if not ui.environ.get(b'HGEXCEPTIONSDIR'):
        return res

    dest = os.path.join(ui.environ[b'HGEXCEPTIONSDIR'],
                        str(uuid.uuid4()).encode('ascii'))

    exc_type, exc_value, exc_tb = sys.exc_info()

    stack = []
    tb = exc_tb
    while tb:
        stack.append(tb)
        tb = tb.tb_next
    stack.reverse()

    hgframe = 'unknown'
    hgline = 'unknown'

    # Find the first Mercurial frame in the stack.
    for tb in stack:
        mod = inspect.getmodule(tb)
        if not mod.__name__.startswith(('hg', 'mercurial')):
            continue

        frame = tb.tb_frame

        try:
            with open(inspect.getsourcefile(tb), 'r') as fh:
                hgline = fh.readlines()[frame.f_lineno - 1].strip()
        except (IndexError, OSError):
            pass

        hgframe = '%s:%d' % (frame.f_code.co_filename, frame.f_lineno)
        break

    primary = traceback.extract_tb(exc_tb)[-1]
    primaryframe = '%s:%d' % (primary.filename, primary.lineno)

    with open(dest, 'wb') as fh:
        parts = [
            str(exc_value),
            primaryframe,
            hgframe,
            hgline,
            ui.environ[b'TESTNAME'].decode('utf-8', 'replace'),
        ]
        fh.write(b'\0'.join(p.encode('utf-8', 'replace') for p in parts))

def extsetup(ui):
    extensions.wrapfunction(dispatch, 'handlecommandexception',
                            handleexception)