[slf4j-dev] Cross Building SLF4S against Scala versions

[Heiko Seeberger]

And here comes the solution:
http://github.com/hseeberger/scala-profiles-demo

Run Maven twice:
1. mvn install
2. mvn -Pscala-2.7.7 install

You wil get exactly what we need:
./scala-profiles-demo_2.7.7
./scala-profiles-demo_2.7.7/1.0-SNAPSHOT
./scala-profiles-demo_2.7.7/1.0-SNAPSHOT/maven-metadata-local.xml
./scala-profiles-demo_2.7.7/1.0-SNAPSHOT/scala-profiles-demo_2.7.7-1.0-SNAPSHOT.jar
./scala-profiles-demo_2.7.7/1.0-SNAPSHOT/scala-profiles-demo_2.7.7-1.0-SNAPSHOT.pom
./scala-profiles-demo_2.7.7/maven-metadata-local.xml
./scala-profiles-demo_2.8.0
./scala-profiles-demo_2.8.0/1.0-SNAPSHOT
./scala-profiles-demo_2.8.0/1.0-SNAPSHOT/maven-metadata-local.xml
./scala-profiles-demo_2.8.0/1.0-SNAPSHOT/scala-profiles-demo_2.8.0-1.0-SNAPSHOT.jar
./scala-profiles-demo_2.8.0/1.0-SNAPSHOT/scala-profiles-demo_2.8.0-1.0-SNAPSHOT.pom
./scala-profiles-demo_2.8.0/maven-metadata-local.xml

Heiko

On 8 September 2010 08:19, Heiko Seeberger
<heiko.seeberger at googlemail.com>wrote:

> Hi Ceki,
>
> Different Scala versions are binary incompatible and I don't believe that
> will change in the near future, even if Martin has said that once. IMHO
> 2.8.1 will not be binary compatible with 2.8.0. And 2.8.2 won't be with
> 2.8.1 nor with  2.8.0. And of course neither of these is compatible with
> 2.7.x. If you are interested in the reasons, you will find numerous
> resources on the web, e.g. [1] or [2]. Maybe starting from 2.9 EPFL will
> manage to solve that issue.
>
> But that's not a reason to pack and go home. The solution is simple:
> Cross-build your libraries and frameworks against all the versions you want
> to support. If you look at an example of such a library deployed to a Maven
> style repository you will see that the artifact ID is suffixed with _2.8.0
> or whatever Scala version [3]. So there is not only the project version but
> also the Scala version. SBT [4] makes that very easy, but I think I know a
> solution for Maven, too.
>
> Akka has not yet been released (only milestones) and therefore they can
> target only one Scala version. But they already do it the style I described,
> i.e. they are ready for multiple versions. Lift already does builds against
> 2.7.7 and 2.8.0. And there will be others.
>
> For something as widespread as SLF4J there in NO WAY not supporting 2.7.7
> plus 2.8.0 plus 2.8.x. It just must be cross-built.
>
> So your (d) is not an option, but as I already mentioned I hope to find a
> Maven based solution.
>
> Heiko
>
> [1]
> http://stackoverflow.com/questions/2053265/scala-binary-incompatibility-between-releases
> [2]
> http://it-republik.de/jaxenter/news/Scala---Die-Reifepruefung-056248.html
> [3]
> http://scala-tools.org/repo-releases/com/weiglewilczek/scalamodules/scalamodules-core_2.8.0/2.0.0.RC2/
> [4] http://code.google.com/p/simple-build-tool/
>
> On 7 September 2010 22:59, Ceki Gülcü <ceki at qos.ch> wrote:
>
>> On 07/09/2010 10:53 PM, Ceki Gülcü wrote:
>>
>>> On 07/09/2010 8:08 PM, Heiko Seeberger wrote:
>>>
>>
>>  As we will probably see Scala 2.8.1 end of this year and milestones and
>>>> release candidates even earlier, this is an important issue for SLF4S.
>>>> How could we deal with that?
>>>>
>>>
>>> There is no way 2.8.1 will be (or can be) incompatible with 2.8. The 2.7
>>> to 2.8 binary incompatibility was a single fluke occurrence.
>>>
>>
>> 2.8.1 will be binary compatible with 2.8.0. See http://bit.ly/93ie5V
>>
>> _______________________________________________
>> slf4j-dev mailing list
>> slf4j-dev at qos.ch
>> http://qos.ch/mailman/listinfo/slf4j-dev
>>
>
>
>
> --
> Heiko Seeberger
>
>
> Company: weiglewilczek.com
> Blog: heikoseeberger.name
> Follow me: twitter.com/hseeberger
> OSGi on Scala: scalamodules.org
> Lift, the simply functional web framework: liftweb.net
> Akka - Simpler Scalability, Fault-Tolerance, Concurrency & Remoting through
> Actors: akkasource.org
>



-- 
Heiko Seeberger

Company: weiglewilczek.com
Blog: heikoseeberger.name
Follow me: twitter.com/hseeberger
OSGi on Scala: scalamodules.org
Lift, the simply functional web framework: liftweb.net
Akka - Simpler Scalability, Fault-Tolerance, Concurrency & Remoting through
Actors: akkasource.org
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