CmdActions reference to dependencies, targets and changed dependencies

[schettino72]

An action may now look like this:

"zip %(targets)s %(changed)s"

[Philipp Tölke (toelke+lp)]

1) add an attribute "task" to Action. this way action has access to
it's task meta information. So on Task constructor we do:

   for action in self.actions:
        action.task = self

2) on Dependency.up_to_date return a list of changed dependencies. an
empty list would mean up-to-date.

3) on runner.py we would save the changed files in the task object:
 task.dep_changed = dependencyManager.up_to_date(task.name,
                                 task.file_dep, task.targets, task.run_once)

4) finally on CmdAction we would build the dict from the task data

 action = self.action % {'targets': " ".join(self.task.targets),
                                  'changed': " ".join(self.task.dep_changed),
                                  'dependencies': " ".join(self.task.dependencies)}

[schettino72 (schettino72)]

2) on Dependency.up_to_date return a list of changed dependencies. an
empty list would mean up-to-date.

actually just returning a list wont work... a task might not be up-to-date but have no changed dependencies. so return 2 values is_up_to_date, and changed list.

[Philipp Tölke (toelke+lp)]

My original patch took care of that. I had exactly that bug :-)

[Philipp Tölke (toelke+lp)]

Please see ~toelke%2Blp/doit/onlychanged-bug/

I think this fixes this bug.

[schettino72 (schettino72)]

thanks. merged on rev 132.

I guess the status "Fix Committed" applies only to trunk. So next time please leave it to me change it to Fix Committed after I merge.