How should reconfiguring CopySpecs on the Amp task work?

[vierbergenlars]

There are a couple of different options.

1. Throw away the already configured CopySpec and initialize it to a clean new one. This allows you to make complete adjustments, like you would do to a normal property; you don't have to take into account previous manipulations of the CopySpec. We have to look if it is possible to create a detached copySpec and attach it to the task's root CopySpec during task execution.
2. Use the existing CopySpec and configure it further. This allows you to make adjustments to the CopySpec that was configured previously, but you will have to take into account previous manipulations. But that also means you can extend on the current configuration of the CopySpec (for example, to add an extra file or to add expansions)
3. (Current situation) Create a new CopySpec for every invocation and add it to a hidden parent CopySpec. This gives you a clean environment to configure your CopySpec every time; but there is no way to remove the previously configured CopySpec, which means all files in that one will also be copied.