[Sparkle] Avoiding an incompatible update

[Andy Matuschak]

Whoa, whoa, it's way simpler than all this: there's a  
sparkle:minimumSystemVersion element supported in trunk. I don't think  
it's documented, but just put the minimum system version for the  
version in question as the value of that element as a child of the RSS  
item.

- Andy Matuschak

On Jan 20, 2008, at 6:09 PM, Justin Bur <jbur at druide.com> wrote:

> SparklePlus, which I think Andy has incorporated into the trunk now,
> allows sending various system profile information as arguments on the
> http request for the appcast. The appcast is not a fixed xml file,
> but rather a php script that interprets these arguments for
> statistical purposes – or for customizing the appcast.
>
> Although it is considered polite to ask permission before
> transmitting people's system details, I think it is legitimate to
> send just the system version number, if that is a piece of
> information you need to offer the correct update. The rest of the
> profile information should not be sent (the code to compile and
> transmit it should be commented out).
>
> The only problem with this solution is that it won't help you unless
> you've adopted it for the release *before* the one that needs to
> decide whether you're on Tiger or Leopard... you can't really upgrade
> in the field!
>
> Justin
>
> On Jan 20, 2008, at 17:21, David Dunham wrote:
>
>> I'm planning a Leopard-only update, and realized that I don't have
>> anything in place to prevent a user running Tiger from updating to
>> this version. How are people handling this?
>>
>> One thought that crossed my mind was to switch the URL that Sparkle
>> uses. This would allow the Leopard only version to have Sparkle
>> updates. And it would keep Tiger users safe. But it would prevent
>> Leopard users from learning about the update.
>>
>> David Dunham           A Sharp, LLC           +1 206 783 7404
>> The Opal outliner is now available!  http://a-sharp.com/opal/
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