Re: [SyncEvolution] Google Calendar sync

As those who have tried the "google" config template know, only contact synchronization over SyncML works, because that is all that Google supports. Those who want to synchronize their Google calendar have to use third-party bridges to that data (ScheduleWorld, Goosync). http://bugzilla.meego.com/show_bug.cgi?id=319 A "native" solution would be to access the Google calendar via CalDAV. I gave that a try, using the Evolution Data Server CalDAV/Google backend as implementation of the protocol. In theory, this should have worked out-of-the-box with SyncEvolution, although setting it up would be fairly complex: * set up syncevo-http-server to access Google calendar * set up a client config to access the normal local calendar and syncevo-http-server * run command line with "--daemon=no", because that is currently the only way how we can have SyncML client and server on the same host In practice I ran into several problems which makes this approach unusable right now. For those who are interested in details, below is a description of the problems. My conclusion right now is: 1. We need a better solution for backend A<->backend B syncs (I sometimes call that "local sync"). 2. We should better write a CalDAV backend instead of relying on EDS. Not only will that avoid the issues below (which could be fixed), such a backend would also be useful for users not interested in running EDS and perform better. I'm assuming here that CalDAV has functionality that would helps us (like efficient listing of all items) which we can't use when going through EDS because it doesn't have corresponding APIs.