rubocop --out does not create parent directories

[hashar]

It would be rather useful to have rubocop create parent directories of the file specified with --out

$ rubocop --format html --out log/rubocop.html
No such file or directory @ rb_sysopen - log/rubocop.html
...

My purpose is to have rubocop run via Jenkins on patch submission. By convention we put all result in a directory /log/ which is always created by Jenkins since it might not exist in the software repository.

We would like /log/ to be defined in .rubocop.yml but then, developers would have the issue above since /log/ does not exist in their repo.