如何在 Gradle 中遮蔽传递依赖？

Question

Is there a way to shadow a particular (transitive) dependency in Gradle? My situation: I have a project that depends directly on com.amazonaws:aws-java-sdk-emr:1.10.33 and org.apache.hadoop:hadoop-aws:2.7.1 , but hadoop-aws in turns depends on com.amazonaws:aws-java-sdk-emr:1.7.4 which screws the final JAR, but I need both anyway.

Is it currently possible to do something like this?

shadowJar {
    relocate('com.amazonaws', 'shadowedstuff.awsjdk') {
        include(dependency('com.amazonaws:aws-java-sdk:1.7.4'))
    }
}

Or a not-so-dirty workaround for it?

Thanks!

NOTE : shading the aws-sdk which my projects depends on directly is not an option. This is a simplification and in the original setup some reflection is going on.

Answer 1

Yes, you can use the shadow plugin for Gradle to which has a very similar syntax to your example:

// Configuring Filtering for Relocation
shadowJar {
   relocate('junit.textui', 'a') {
       exclude 'junit.textui.TestRunner'
   }
   relocate('junit.framework', 'b') {
       include 'junit.framework.Test*'
   }
}

Answer 2

Apologies if I've misunderstood your situation and it is in fact more complex but it looks like the exclusion can just be provided in the dependency declaration?

dependencies {
    ...
    compile('org.apache.hadoop:hadoop-aws:2.7.1') {
        exclude group: 'com.amazonaws', module: 'aws-java-sdk'
    }
    ...
}

Answer 3

You can try the resolutionStrategy ( https://docs.gradle.org/current/dsl/org.gradle.api.artifacts.ResolutionStrategy.html ) to force a particular version.

Example from a projet:

configurations {
    testImplementation.extendsFrom compileOnly

    all {
        resolutionStrategy {
            // Force jackson 2.4.4 for Spark
            force 'com.fasterxml.jackson.core:jackson-core:2.4.4', 'com.fasterxml.jackson.core:jackson-databind:2.4.4', 'com.fasterxml.jackson.core:jackson-annotations:2.4.4'
            force 'com.google.guava:guava:23.6-jre'
        }
    }
}