Mercurial hook preventing debugger initializator slipping into repository

prevent_debugger.py

from mercurial import hg, ui, util

searched_string = 'pdb.set_trace'

def hook(ui, repo, **kwargs):
        current_context = repo[None]
        for file_name in current_context.files():
                if not file_name.endswith('.py'):
                        continue
                file_context = current_context.filectx(file_name)
                file_data = file_context.data()
                if searched_string in file_data:
                        raise util.Abort("File %s contains forbidden string %s" % (file_name, searched_string))
        return False