parameters: (self)
docstring: Called just before the task is executed.
  
          This is mainly intended to give the target Nodes a chance to
          unlink underlying files and make all necessary directories before
          the Action is actually called to build the targets.
docstring_summary: Called just before the task is executed.
docstring_tokens: Called just before the task is executed .
function: def prepare(self):
          """
          Called just before the task is executed.
  
          This is mainly intended to give the target Nodes a chance to
          unlink underlying files and make all necessary directories before
          the Action is actually called to build the targets.
          """
          global print_prepare
          T = self.tm.trace
          if T: T.write(self.trace_message(u'Task.prepare()', self.node))
  
          # Now that it's the appropriate time, give the TaskMaster a
          # chance to raise any exceptions it encountered while preparing
          # this task.
          self.exception_raise()
  
          if self.tm.message:
              self.display(self.tm.message)
              self.tm.message = None
  
          # Let the targets take care of any necessary preparations.
          # This includes verifying that all of the necessary sources
          # and dependencies exist, removing the target file(s), etc.
          #
          # As of April 2008, the get_executor().prepare() method makes
          # sure that all of the aggregate sources necessary to build this
          # Task's target(s) exist in one up-front check.  The individual
          # target t.prepare() methods check that each target's explicit
          # or implicit dependencies exists, and also initialize the
          # .sconsign info.
          executor = self.targets[0].get_executor()
          if executor is None:
              return
          executor.prepare()
          for t in executor.get_action_targets():
              if print_prepare:
                  print "Preparing target %s..."%t
                  for s in t.side_effects:
                      print "...with side-effect %s..."%s
              t.prepare()
              for s in t.side_effects:
                  if print_prepare:
                      print "...Preparing side-effect %s..."%s
                  s.prepare()
function_tokens: def prepare ( self ) : global print_prepare T = self . tm . trace if T : T . write ( self . trace_message ( u'Task.prepare()' , self . node ) ) # Now that it's the appropriate time, give the TaskMaster a # chance to raise any exceptions it encountered while preparing # this task. self . exception_raise ( ) if self . tm . message : self . display ( self . tm . message ) self . tm . message = None # Let the targets take care of any necessary preparations. # This includes verifying that all of the necessary sources # and dependencies exist, removing the target file(s), etc. # # As of April 2008, the get_executor().prepare() method makes # sure that all of the aggregate sources necessary to build this # Task's target(s) exist in one up-front check.  The individual # target t.prepare() methods check that each target's explicit # or implicit dependencies exists, and also initialize the # .sconsign info. executor = self . targets [ 0 ] . get_executor ( ) if executor is None : return executor . prepare ( ) for t in executor . get_action_targets ( ) : if print_prepare : print "Preparing target %s..." % t for s in t . side_effects : print "...with side-effect %s..." % s t . prepare ( ) for s in t . side_effects : if print_prepare : print "...Preparing side-effect %s..." % s s . prepare ( )