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Re: [epp-dev] Include versus requires/import

There are a few differences. I don't know if I've got them all correct, but I'll give it a shot (please correct me if I'm wrong).

Build time differences:

Required means that the following features will be needed for the install to proceed, but not packaged with the feature. For example, if I 'require' SWT in my feature, my feature won't actually ship with SWT. This is not really needed anymore because my UI bundle likely has a dependency on SWT (which essentially means the same thing).  

Included features means that the feature will actually be pulled down and shipped as part of the feature.

p2 (Installation) Differences.

Requires allows you to set a range. My 'Awesome C++ Analysis tool' requires the CDT version [8.0 - 9.0). It won't work will less than 8.0, and I don't support it on 9.0 and above. I don't ship CDT as part of my feature, but it needs to be there.

Included features means my Feature is expecting (and shipping) an exact version of CDT.  So, for C/C++ EPP SR0 (June 2012) we likely want to indicate an 'exact' version of the CDT that ships.  This means that in 10 years, if someone wants to re-create that version, it's easy (since the versions are baked into the features).

Cheers,
Ian

On Tue, Mar 20, 2012 at 9:10 AM, Doug Schaefer <dschaefer@xxxxxxx> wrote:
Hey gang,

Looking through the changes Linuxtools made to the CPP package to merge the two, I noticed that they Include their features as opposed to add them to the required section. I assume this was to allow for optionality. Should we be including all our features this way? What's the difference between include and require?

Thanks,
Doug.

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R. Ian Bull | EclipseSource Victoria | +1 250 477 7484
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