Returns a path to version.ini.

def VersionPath():
  """Returns a path to version.ini."""

  # Try to get a version.ini. It should be in the resources if the code
  # was packed with "pip sdist". It will be 2 levels up from grr_response_core
  # if the code was installed via "pip install -e".
  version_ini = (
      package.ResourcePath("grr-response-core", "version.ini") or
      package.ResourcePath("grr-response-core", "../../version.ini"))

  if not os.path.exists(version_ini):
    raise RuntimeError("Can't find version.ini at %s" % version_ini)

  return version_ini