utility module make folders #1343

[MontrealSergiy]

see #1343 for details

[prioux]

The code to make the directories should not be performed in a method that is meant to return a descriptor to the framework. It should be done in "setup", that's the proper place where everything related to preparing a work directory is supposed to happen.

[prioux]

Actually I double checked, the on-disk invoke struct is created during 'cluster_commands()' so that's the method you need to override instead of setup().

[MontrealSergiy]

So do I keep old version (with minor improvements in variable names and plus of course), or should I avoid altering the command line and created subfolders directly instead?

[prioux]

Don't modify the command line. Just writ the ruby code that run the mkdir. That's it.

[MontrealSergiy]

ok. Another possibility is to factor out invocation struct massaging into separate method, so setup can be used

[MontrealSergiy]

Done.

(adjusted to create subfolders asap)

[MontrealSergiy]

As agreed in person with Pierre, the method cluster_commands() is modified (but in a more complex way than at the first attempt)