Getting absolute file path

[jiridusil]

Before running a test I need to update a yaml file on a file system outside of 'cypress' folder.

Example:
Under 'fixtures' folder I have a following directory structure:
-> env1 -> config.yaml
-> env2 -> config.yaml
-> env3 -> config.yaml

Before running a test I need to copy particular config.yaml from above to folder 'Users/jiri/source/'.

I want to use cy.exec('cp source_file target_folder');

The question is how to get an absolute (full) path of the config.yaml file from 'fixtures'. Thank you so much in advance.