Re: Transitive Dependencies: Is the parent or child dependency the "nearest dependency"?

[Brett Porter <br...@apache.org>]

If you care, you should add the one that you want to the  
dependencyManagement element of your POM rather than trying to  
workaround this.

As for Maven itself, I would have expected parent to come first - but  
it's not as simple the first level being first, it's rather which is  
encountered first - you'll see this via the trace when running with - 
X. If you think there's an inconsistency between Maven 2.2.1 and  
earlier versions then that might be a bug, but otherwise I would stick  
with the resolution it chooses for now.

- Brett

On 02/10/2009, at 9:10 AM, Robert Winch wrote:

> There is a discrepancy in how m2eclipse (latest stable) resolves a  
> version
> of a dependency and Maven 2.2.1 does and I am trying to figure out  
> which is
> correct. I understand that the "nearest dependency" is suppose to be  
> the
> version that is resolved [1]. I also understand that the first defined
> dependency is used if the depth is the same (Maven 2.0.9 or later).  
> However,
> I am not sure which is resolved if the depth is the same and one is  
> defined
> in a parent and the other in the child. I have copied the simplified  
> example
> that reproduces the discrepancy in below [2]. The issue is that
> spring-webflow-1.0.6.jar (located in the parent) defines
> spring-core-2.0.7.jar as a direct dependency and spring-aop-2.5.6.jar
> (located in the child) defines spring-core-2.5.6.jar as a direct  
> dependency.
> Which version of spring-core should be resolved? The m2eclipse plugin
> resolves spring-core-2.0.7.jar and Maven 2.2.1 resolves
> spring-core-2.5.6.jar.
>
> Thanks in advance :)
>
> [1]
> http://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Transitive_Dependencies
>
> [2]
>
> parent
>
> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="
> http://www.w3.org/2001/XMLSchema-instance"
>    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> http://maven.apache.org/maven-v4_0_0.xsd">
>    <modelVersion>4.0.0</modelVersion>
>    <groupId>parent</groupId>
>    <artifactId>parent</artifactId>
>    <packaging>pom</packaging>
>    <version>1.0-SNAPSHOT</version>
>    <dependencies>
>        <dependency>
>            <groupId>org.springframework</groupId>
>            <artifactId>spring-webflow</artifactId>
>            <version>1.0.6</version>
>        </dependency>
>    </dependencies>
> </project>
>
> child
>
> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="
> http://www.w3.org/2001/XMLSchema-instance"
>    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> http://maven.apache.org/maven-v4_0_0.xsd">
>    <parent>
>        <artifactId>parent</artifactId>
>        <groupId>parent</groupId>
>        <version>1.0-SNAPSHOT</version>
>    </parent>
>    <modelVersion>4.0.0</modelVersion>
>    <groupId>child</groupId>
>    <artifactId>child</artifactId>
>    <packaging>war</packaging>
>    <version>1.0-SNAPSHOT</version>
>
>    <dependencies>
>        <dependency>
>            <groupId>org.springframework</groupId>
>            <artifactId>spring-aop</artifactId>
>            <version>2.5.6</version>
>        </dependency>
>    </dependencies>
> </project>


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