contrib/debugshell.py

histedit: suggest "histedit --abort" for inconsistent histedit state

Mercurial earlier than 2.7 allows users to do anything other than
starting new histedit, even though current histedit is not finished or
aborted yet. So, unfinished (and maybe inconsistent now) histedit
states may be left and forgotten in repositories.

Before this patch, histedit extension shows the message below, when it
detects such inconsistent state:

   abort: REV is not an ancestor of working directory
   (update to REV or descendant and run "hg histedit --continue" again)

But this message is incorrect, unless old Mercurial is re-installed,
because Mercurial 2.7 or later disallows users to update the working
directory to another revision.

This patch changes the hint message to suggest "hg histedit --abort".

# debugshell extension
"""a python shell with repo, changelog & manifest objects"""

import mercurial
import code

def debugshell(ui, repo, **opts):
    objects = {
        'mercurial': mercurial,
        'repo': repo,
        'cl': repo.changelog,
        'mf': repo.manifest,
    }
    bannermsg = "loaded repo : %s\n" \
                "using source: %s" % (repo.root,
                                      mercurial.__path__[0])
    code.interact(bannermsg, local=objects)

cmdtable = {
    "debugshell|dbsh": (debugshell, [])
}