It is hard to make it clearer; suppose a version 2.0 of some library X got all
@deprecated methods from 1.0 removed. A clean up. The project could have two
dependencies that both refer to this library:
P -> A -> X 2.0
-> B -> X 1.0
If this is resolved, then indeed X 2.0 is included, however B expects the 1.0
version and may be using a @deprecated method that is no longer present. The
end project will crash.
Is it possible to tell Maven that 2.0 is not a substitute for 1.0?
On 13-4-2011 13:42, Benson Margulies wrote:
There is perhaps a communications problem here. I don't think this is
about ranges. I suspect that it is about:
- project g:A version 1 depends on x:y:2.0
- project g:B version 1 depends on g:A:1 and x:y:1.0
What ends up in the classpath of B? x:y:2.0, I think.
On Wed, Apr 13, 2011 at 7:17 AM, Schrecker, Wolfgang
<wolfgang.schrec...@atosorigin.com> wrote:
Maybe http://maven.apache.org/enforcer/enforcer-rules/index.html
could help.
Wolfgang
-----Ursprüngliche Nachricht-----
Von: Jörg Schaible [mailto:joerg.schai...@scalaris.com]
Gesendet: Mittwoch, 13. April 2011 11:55
An: users@maven.apache.org
Betreff: Re: breaking backwards compatibility
Hi Tom,
Tom Eugelink wrote:
I know Maven version management can be, ah, challenging, so I stick to
Maven compatible versioning. Maybe not to the deepest level (1.0.0-b01),
but surely in a very common accepted style (1.0). I am not having any
problems with Maven using the wrong versions.
My question is with how to tell Maven two releases are no longer
compatible. So if one dependency uses 1.x and the other uses 2.x, and 2.x
is "declared" not backwards compatible to 1.x, then Maven should either:
1. report a build error on a version conflict 2. or include both versions
of the artifact.
What means "not compatible" for a single artifact? If my application only
uses a constant defined in some class, the dependency is only incompatible
if this constant is no longer available, has a different type or a value
that causes a failure situation in my own app.
You can define real incompatibility only from the consumer side. So what
could Maven actually report by default?
- Jörg
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