If I understand the situation
A depends on B with a provided scope
B depends on C with a provided scope.
B should clearly indicate this on the outside of the box right under the
"Consuming this over a long period will cause cancer or at least confusion"
in big red letters: "You need to provide a compatible C in order to get
the desired effect from B."
It should also tell you what sort of C you need to provide for each sort
of B you need to consume.
If B is not, or can not be, delivered as a fully functional unit (black
box) it has to tell the user.
I would make a maven artifact BC out of a working combination of B and C
and store that in my repo as "BC" and make my A's depend on BC rather
than including both B and C as provided in A. I would then provide BC
rather than B and C or I would make it compile scope and get Maven to
include BC in my build.
Ron
On 15/03/2013 6:14 AM, Patrick Schlebusch wrote:
Thomas Broyer wrote at some time:
Because a class in A transitively depends on a class provided by C then
it
*has* to know about C. Class hierarchy is part of the API (which is one
reason you should generally prefer composition over inheritance).
The compiler needs to know about artifact C of course. But I as the
consumer of artifact B should not need to know B's dependencies. Actually
I thought this was the reason for the whole automatic resolution of
transitive dependencies. This is not for convenience, it hides internal
details of B from A.
Otherwise that would mean I would need to first look at the POMs of all my
dependencies and basically copy all provided scope dependencies to my
project. Which kind of reminds me of software development without Maven.
Best regards,
Patrick
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