view contrib/debugshell.py @ 42304:9c6c0f736e1d

rust-dirstate: call parse/pack bindings from Python

A future patch will need to address the issue of Rust module policy,
to avoid having ugly duplicate imports and conditionals all over the place.

As the rewrite of dirstate in Rust progresses, we will need fewer of those
"contact points".

Differential Revision: https://phab.mercurial-scm.org/D6350

# 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)