def shell(ui, repo, **opts):
    import mercurial
    from mercurial import demandimport
    demandimport.disable()

    objs = {
        'mercurial': mercurial,
        'repo': repo,
        'ui': ui,
    }
    banner = 'repo: %s\nsource: %s' % (repo.root, mercurial.__path__[0])
    try:
        from IPython.config.loader import Config
        from IPython.frontend.terminal.embed import InteractiveShellEmbed as Sh
    except:
        import code, traceback
        traceback.print_exc()
        return code.interact(banner=banner, local=objs)
    else:
        cfg = Config()
        cfg.TerminalInteractiveShell.confirm_exit = False
        pc = cfg.PromptManager
        pc.in_template = '[\#]> '
        pc.in2_template = '.\D.  '
        pc.out_template = '[\#]= '
        return Sh(user_ns=objs, config=cfg, banner1=banner)()

def critique(ui, repo, entire=False, node=None, **kwargs):
    """Perform a critique of a changeset."""
    demandimport.disable()

    from flake8.engine import get_style_guide
    from pep8 import DiffReport, parse_udiff

    style = get_style_guide(parse_argv=False, ignore='E128')

    ctx = repo[node]

    if not entire:
        diff = ''.join(ctx.diff())
        style.options.selected_lines = {}
        for k, v in parse_udiff(diff).items():
            if k.startswith('./'):
                k = k[2:]

            style.options.selected_lines[k] = v

        style.options.report = DiffReport(style.options)

    deleted = repo.status(ctx.p1().node(), ctx.node())[2]
    files = [f for f in ctx.files() if f.endswith('.py') and f not in deleted]
    style.check_files(files)

    demandimport.enable()

def launch_browser(ui, request_url):
    # not all python installations have the webbrowser module
    from mercurial import demandimport
    demandimport.disable()
    try:
        import webbrowser
        webbrowser.open(request_url)
    except:
        ui.status('unable to launch browser - webbrowser module not available.')

    demandimport.enable()

#                                        # inrepo:  branch = mercurial branch
#
#   branch = branchname                  # if set, branch is always branchname

import os

from mercurial.i18n import gettext as _
from mercurial.node import bin, hex, nullid
from mercurial.context import workingctx

# mercurial's on-demand-importing hacks interfere with the:
#from zope.interface import Interface
# that Twisted needs to do, so disable it.
try:
    from mercurial import demandimport
    demandimport.disable()
except ImportError:
    pass

from buildbot.clients import sendchange
from twisted.internet import defer, reactor


def hook(ui, repo, hooktype, node=None, source=None, **kwargs):
    # read config parameters
    master = ui.config('hgbuildbot', 'master')
    if master:
        branchtype = ui.config('hgbuildbot', 'branchtype')
        branch = ui.config('hgbuildbot', 'branch')
    else:
        ui.write("* You must add a [hgbuildbot] section to .hg/hgrc in "

# -*- coding: utf-8 -*-
try:
    # The 'demandimport' breaks pyflakes and flake8._pyflakes
    from mercurial import demandimport
except ImportError:
    pass
else:
    demandimport.disable()
import os
import pycodestyle as pep8
import pyflakes
import pyflakes.checker

def patch_pyflakes():
    """Add error codes to Pyflakes messages."""
    codes = dict([line.split()[::-1] for line in (
        'F401 UnusedImport',
        'F402 ImportShadowedByLoopVar',
        'F403 ImportStarUsed',
        'F404 LateFutureImport',
        'F405 ImportStarUsage',
        'F810 Redefined',               # XXX Obsolete?
        'F811 RedefinedWhileUnused',
        'F812 RedefinedInListComp',
        'F821 UndefinedName',
        'F822 UndefinedExport',
        'F823 UndefinedLocal',
        'F831 DuplicateArgument',
        'F841 UnusedVariable',
    )])