Sync zip file with folder?

Question

I know specifying a zip file in the command add the files to the zip file itself, but how can I really sync a folder having already a zip file so that it does add new files, replace modified files and delete absent files in the folder?

Answer 1

The command-line "zip" tool has the -FS (or --filesync) flag that does exactly this (updates existing, adds new, deletes removed).

See http://www.info-zip.org/mans/zip.html.