533             hgrustext = os.environ.get('HGWITHRUSTEXT')

   533             hgrustext = os.environ.get('HGWITHRUSTEXT')

   534             # TODO record it for proper rebuild upon changes

   534             # TODO record it for proper rebuild upon changes

   535             # (see mercurial/__modulepolicy__.py)

   535             # (see mercurial/__modulepolicy__.py)

   536             if hgrustext != 'cpython' and hgrustext is not None:

   536             if hgrustext != 'cpython' and hgrustext is not None:

   537                 if hgrustext:

   537                 if hgrustext:

   539                     printf(msg, file=sys.stderr)

   539                     printf(msg, file=sys.stderr)

   540                 hgrustext = None

   540                 hgrustext = None

   541             self.rust = hgrustext is not None

   541             self.rust = hgrustext is not None

   542             self.no_rust = not self.rust

   542             self.no_rust = not self.rust

   543         return ret

   543         return ret