1596     @annotatesubrepoerror

  1597     def diff(self, ui, diffopts, node2, match, prefix, **opts):

  1598         node1 = self._state[1]

  1599         cmd = ['diff']

  1600         if opts['stat']:

  1601             cmd.append('--stat')

  1602         else:

  1603             # for Git, this also implies '-p'

  1604             cmd.append('-U%d' % diffopts.context)

  1605 

  1606         gitprefix = os.path.join(prefix, self._path)

  1607 

  1608         if diffopts.noprefix:

  1609             cmd.extend(['--src-prefix=%s/' % gitprefix,

  1610                         '--dst-prefix=%s/' % gitprefix])

  1611         else:

  1612             cmd.extend(['--src-prefix=a/%s/' % gitprefix,

  1613                         '--dst-prefix=b/%s/' % gitprefix])

  1614 

  1615         if diffopts.ignorews:

  1616             cmd.append('--ignore-all-space')

  1617         if diffopts.ignorewsamount:

  1618             cmd.append('--ignore-space-change')

  1619         if self._gitversion(self._gitcommand(['--version'])) >= (1, 8, 4) \

  1620                 and diffopts.ignoreblanklines:

  1621             cmd.append('--ignore-blank-lines')

  1622 

  1623         cmd.append(node1)

  1624         if node2:

  1625             cmd.append(node2)

  1626 

  1627         if match.anypats():

  1628             return #No support for include/exclude yet

  1629 

  1630         if match.always():

  1631             ui.write(self._gitcommand(cmd))

  1632         elif match.files():

  1633             for f in match.files():

  1634                 ui.write(self._gitcommand(cmd + [f]))

  1635         elif match(gitprefix): #Subrepo is matched

  1636             ui.write(self._gitcommand(cmd))

  1637