Maven 2 - define dependency version from transitive dependency version

Question

I\'ll explain the question with my real situation.

I use logback 1.0.1 for logging, and it includes SLF4J 1.6.4 as a dependency. I also use the SLF4J API bridges for

Answer 1

Dependency Convergence may help you. Thank you @wemu!

I have a same? problem.

You can clone https://gist.github.com/f35db1ac6dc8b6f45393.git

  
    ch.qos.logback
    logback-classic
    1.1.3
    runtime 
  
  
    org.slf4j
    log4j-over-slf4j
    ${unified.slf4j-api.version}
    runtime
  
  
    org.slf4j
    slf4j-api
    ${unified.slf4j-api.version}
  


  UTF-8
  1.7.7


  
    
      org.apache.maven.plugins
       maven-enforcer-plugin
       1.4.1
       
         
           enforce
           
             
               
             
           
           
             enforce
           
         
       
     
  

At this point, things just work.

$ mvn -Dverbose=true dependency:tree verify
...
[INFO] test:enforcer-dependency-convergence-test:jar:0.1-SNAPSHOT
[INFO] +- ch.qos.logback:logback-classic:jar:1.1.3:runtime
[INFO] |  +- ch.qos.logback:logback-core:jar:1.1.3:runtime
[INFO] |  \- (org.slf4j:slf4j-api:jar:1.7.7:runtime - omitted for duplicate)
[INFO] +- org.slf4j:log4j-over-slf4j:jar:1.7.7:runtime
[INFO] |  \- (org.slf4j:slf4j-api:jar:1.7.7:runtime - omitted for duplicate)
[INFO] \- org.slf4j:slf4j-api:jar:1.7.7:compile
[INFO]
[INFO] --- maven-enforcer-plugin:1.4.1:enforce (default) @ enforcer-dependency-convergence-test ---
[INFO]
...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
...

$

Now let's change the slf4j-api's version.

$ mvn -Dunified.slf4j-api.version=1.7.13 -Dverbose=true dependency:tree verify
...
[INFO] test:enforcer-dependency-convergence-test:jar:0.1-SNAPSHOT
[INFO] test:enforcer-dependency-convergence-test:jar:0.1-SNAPSHOT
[INFO] +- ch.qos.logback:logback-classic:jar:1.1.3:runtime
[INFO] |  +- ch.qos.logback:logback-core:jar:1.1.3:runtime
[INFO] |  \- (org.slf4j:slf4j-api:jar:1.7.7:runtime - omitted for conflict with 1.7.13)
[INFO] +- org.slf4j:log4j-over-slf4j:jar:1.7.13:runtime
[INFO] |  \- (org.slf4j:slf4j-api:jar:1.7.13:runtime - omitted for conflict with 1.7.7)
[INFO] \- org.slf4j:slf4j-api:jar:1.7.13:compile
[INFO]
[INFO] --- maven-enforcer-plugin:1.4.1:enforce (default) @ enforcer-dependency-convergence-test ---
[WARNING]
Dependency convergence error for org.slf4j:slf4j-api:1.7.7 paths to dependency are:
+-test:enforcer-dependency-convergence-test:0.1-SNAPSHOT
  +-ch.qos.logback:logback-classic:1.1.3
    +-org.slf4j:slf4j-api:1.7.7
and
+-test:enforcer-dependency-convergence-test:0.1-SNAPSHOT
  +-org.slf4j:log4j-over-slf4j:1.7.13
    +-org.slf4j:slf4j-api:1.7.13
and
+-test:enforcer-dependency-convergence-test:0.1-SNAPSHOT
  +-org.slf4j:slf4j-api:1.7.13

[WARNING] Rule 0: org.apache.maven.plugins.enforcer.DependencyConvergence failed with message:
Failed while enforcing releasability the error(s) are [
Dependency convergence error for org.slf4j:slf4j-api:1.7.7 paths to dependency are:
+-test:enforcer-dependency-convergence-test:0.1-SNAPSHOT
  +-ch.qos.logback:logback-classic:1.1.3
    +-org.slf4j:slf4j-api:1.7.7
and
+-test:enforcer-dependency-convergence-test:0.1-SNAPSHOT
  +-org.slf4j:log4j-over-slf4j:1.7.13
    +-org.slf4j:slf4j-api:1.7.13
and
+-test:enforcer-dependency-convergence-test:0.1-SNAPSHOT
  +-org.slf4j:slf4j-api:1.7.13
]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
...

$