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Cédric Champeau
committed
on 08 Jan
Support depending on multiple variants of the same component
This commit changes the resolution engine so that it is possible
to resolve mul… Show more
Support depending on multiple variants of the same component

This commit changes the resolution engine so that it is possible

to resolve multiple variants of the same component when using

variant-aware dependency management.

Before, in order to have 2 dependencies on the same component

but using different variants, one had to use explicit configuration

dependencies. Now, with this change, it is possible to have

two dependencies on the same component, but with different attributes.

Those components would resolve to different variants.

Special treatment is applied when attributes are declared on constraints:

in this case, we _merge_ the constraint attributes, and make sure that

the edge is computed using the merged attributes. Should they be

incompatible, the build would fail as before.

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