# caldav.provider - install to /usr/share/accounts/providers
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE provider>
<provider version="1.0" id="caldav">
    <name>CalDAV</name>
    <description>CalDAV Sync Provider</description>
    <icon>image://theme/icon-m-sync</icon>
</provider>

# caldav-yahoo.service - install to /usr/share/accounts/services
<?xml version="1.0" encoding="UTF-8" ?>
<service id="caldav-yahoo">
    <type>sync</type>
    <name>Yahoo! Calendar</name>
    <icon>image://theme/icon-m-sync</icon>
    <provider>caldav</provider>

    <template>
        <setting name="sync_profile">caldav-sync</setting>
        <group name="auth">
            <setting name="method">password</setting>
            <setting name="mechanism">password</setting>
        </group>
    </template>
</service>

# create an account (first zypper in libaccounts-glib-tools)
# $ ag-tool list-services # force reloading provider/service files
# $ ag-tool create-account caldav testcaldav disable
# find out what the ACCOUNT_ID of the account is
# $ ag-tool list-accounts
# manually create a per-account sync profile for that account:

# caldav-sync-ACCOUNT_ID.xml - install to /home/nemo/.cache/msyncd/sync/
<?xml version="1.0" encoding="UTF-8"?>
<profile name="caldav-sync" type="sync" >
    <key name="destinationtype" value="online"/>
    <key name="enabled" value="true"/>
    <key name="hidden" value="true"/>
    <key name="use_accounts" value="true"/>
    <key name="displayname" value="testcaldav"/>
    <key name="accountid" value="ACCOUNT_ID"/>
    <key name="remote_server_address" value="https://caldav.calendar.yahoo.com"/>
    <key name="account_service_name" value="caldav-yahoo"/>

    <!--
      Hack the caldav plugin code to read these keys and use them.
      On device, we store these credentials into an Identity associated
      with the Account, but ag-tool doesn't allow creating credentials,
      so for testing purposes, you can just hack the caldav plugin code
      to get it from here, instead of doing signon with the account.
      -->
    <key name="user_name" value="YOUR_USER_NAME"/>
    <key name="password" value="YOUR_PASSWORD"/>

    <profile type="client" name="caldav">
        <key value="two-way" name="Sync Direction"/>
        <key value="caldav" name="Sync Protocol"/>
        <key value="HTTP" name="Sync Transport"/>
        <key value="prefer remote" name="conflictpolicy" />
    </profile>
</profile>

# trigger a sync with that profile
# $ dbus-send --session --type=method_call --print-reply --dest=com.meego.msyncd /synchronizer com.meego.msyncd.startSync string:'caldav-sync-ACCOUNT_ID'