Hi Eike,
On 02/07/2013 11:55, Ziller Eike wrote:
> Hi,
>
> this is the proposed API / binary compatibility policy for 3.0 onward:
>
> * Source and binary compatibility within a minor release series
>     * no "unnecessary" public API changes after the Beta release,
>       changes must be communicated (e.g. note on the mailing list with the 
> change)
>     * public API fixed starting with the RC release
>     * plugins written against the final (.0) release can also be loaded in 
> following patch releases
>       i.e. patch releases have a compatVersion tag for .0 in the plugin spec

Looks good indeed, but you only address binary compatibility between 
patch releases.
What about minor releases? I suppose there's no binary compatibility for 
minor releases (ie a plugin written for 3.0 won't work for 3.1), but I 
prefer to ask just to be clear.

> Example:
>
> The public API of the Qt Creator 3.0 series will be fixed starting from 3.0 
> RC, which has internal version
> number 2.8.8x, compatVersion 2.8.8x (a). The final 3.0.0 release is binary 
> compatible to the 3.0 RC,
> but has compatVersion 3.0.0 (b). So even though the 3.0.0 release is factually
> binary compatible with 3.0 RC, it can only load plugins that were written 
> against 3.0.0.
> A patch release 3.0.1 is binary compatible to 3.0.0, and has compatVersion 
> 3.0.0 (c), so plugins that were
> written against 3.0.0 load in 3.0.1. Plugins that are written against 3.0.1 
> can decide themselves if
> they require 3.0.1 (d), or work with 3.0.0 (e) (by setting the version tag of 
> the dependency accordingly).

I'm not sure I'm following you here. Plugins written against 3.0.1 can 
decide to depend on Core 3.0.1 only. In this case, those plugins won't 
have a compatVersion of 3.0.0 (like in (c)), but 3.0.1, right?
So the dependency really depends on the compatVersion, not the version.

Thanks,
Nicolas

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