# debugshell extension

"""a python shell with repo, changelog & manifest objects"""

from __future__ import absolute_import

import code

import mercurial

import sys

from mercurial import (

    demandimport,

    pycompat,

    registrar,

)

cmdtable = {}

command = registrar.command(cmdtable)

def pdb(ui, repo, msg, **opts):

    objects = {

        'mercurial': mercurial,

        'repo': repo,

        'cl': repo.changelog,

        'mf': repo.manifestlog,

    }

    code.interact(msg, local=objects)

def ipdb(ui, repo, msg, **opts):

    import IPython

    cl = repo.changelog

    mf = repo.manifestlog

    cl, mf # use variables to appease pyflakes

    IPython.embed()

@command(b'debugshell|dbsh', [])

def debugshell(ui, repo, **opts):

    bannermsg = ("loaded repo : %s\n"

                 "using source: %s" % (pycompat.sysstr(repo.root),

                                       mercurial.__path__[0]))

    pdbmap = {

        'pdb'  : 'code',

        'ipdb' : 'IPython'

    }

    debugger = ui.config(b"ui", b"debugger")

    if not debugger:

        debugger = 'pdb'

    else:

        debugger = pycompat.sysstr(debugger)

    # if IPython doesn't exist, fallback to code.interact

    try:

        with demandimport.deactivated():

            __import__(pdbmap[debugger])

    except ImportError:

        ui.warn((b"%s debugger specified but %s module was not found\n")

                % (debugger, pdbmap[debugger]))

        debugger = b'pdb'

    getattr(sys.modules[__name__], debugger)(ui, repo, bannermsg, **opts)