Joining forces vs. starting from scratch (was Re: Proposal to start a new implementation...)

[Matt Harris]

On 4/12/17 5:08 PM, Magnus Melin wrote:
> On 12.4.2017 02:06, Óvári wrote:
>> Why did R Kent James demand CardBook
>> <https://addons.mozilla.org/thunderbird/addon/cardbook/> be licensed 
>> under MPL
>> then? Zero win for CardBook...
>
> Depends on the perspective and your goals for your code. Being license 
> compatible to core code makes it possible to include it in core. In 
> parts or as a whole. If inclusion of some sort is the goal, the 
> license needs to be compatible.
>
>> LibreOffice <https://www.libreoffice.org/> seems to be working, why 
>> not copy
>> their licensing model?
>
> They are actually using the MPLv2, like Thunderbird.
>
> As I see it the problem with MPL is that you don't have to provide 
> your whole derivative work as open source. Only the actual changes, 
> which makes porting a feature extremely impractical as the changes can 
> rely on other code which you don't have to provide.

I would prefer a license that requires any derivative to be open 
source.  That is a derivative mail client.  I have no issue with say a 
JS library being sucked into another project,  with only an attribution.
Matt
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