Imports github.com/emersion/go-ical github.com/emersion/go-vcard github.com/emersion/go-webdav github.com/emersion/go-webdav/caldav github.com/emersion/go-webdav/carddav github.com/rs/zerolog/log Standard library imports context crypto/sha1 encoding/base64 encoding/json errors fmt io io/fs net/http net/url os path path/filepath regexp strings