I have already found a solution for the problem I stated in my last post. I was able to make a shorty Python script that get the information out of the Mercurial repository using Mercurial classes.

It was more simple than I expected. If I manage to clean that up, it would probably be an useful Mercurial extension.

I only paste the Python code here. I would like to setup a git repository for my $HOME/bin scripts. This is definitely not the final product, but it's already something you can use.

#!/usr/bin/python

import mercurial
import sys
from mercurial import ui, hg;

myui = ui.ui()
try:
    # Instanciate the repository.
    hg_repo = hg.repository(myui, sys.argv[1])

    # Get some informations.
    hg_branch = hg_repo.dirstate.branch()
    hg_rev = hg_repo.changelog.rev(hg_repo.changelog.tip())
    if hg_repo.dirstate._dirty:
        hg_dirty = "1"
    else:
        hg_dirty = ""

    print "hg_rev=%s\nhg_branch=%s\nhg_dirty=%s" % (hg_rev, hg_branch, hg_dirty)
except Exception, ex:
    sys.exit(1)