Many thanks for this. I wonder if it will solve my particular problem.
Whilst I use FLE to log my SOTA activations I have a big long list of contacts whilst chasing from home that I need to get into the system. Usually just one or two contacts a day over the course of several months.
If I use FLE as far as I’m aware I would need a separate file for each day’s contacts. if I use your CLI tool am I able to specify multiple sections in one file, each with a different date, so I can generate a single SOTA CSV file to cover a couple of months?
I added some CGI-BIN modules which run GO code to the Wainwrights on the Air site https://wota.org.uk which fit in very well with the existing PHP system. One module allows the use of SOTA CSV compatible logging files to be uploaded. So we are golang amateur radio soulmates in some ways 
Kind regards, Mark, M0NOM