Recently I needed to operate a ton of symbol updates on our libraries. Instead of processing those manually, I spent time working on a tool to translate back and forth symbol library data (stored in “.lib” and “.dcm” files) into the CSV format. I’ve decided to share this tool now that I think it is more or less stable (eg. I did not have any issue with it in the current form).
You can find it on GitHub: https://github.com/eeintech/kicad-database-utils-csv
I hope it can be useful to some, docs are on the Github page.