Exclude dependencies in AnnotationProcessorPaths

Question

I have the following build configuration:

Parent POM:

<build>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>3.8.1</version>
      <configuration>
        <release>11</release>
        <annotationProcessorPaths>
          <path>
            <groupId>com.google.auto.value</groupId>
            <artifactId>auto-value</artifactId>
            <version>1.6.5</version>
          </path>
        </annotationProcessorPaths>
      </configuration>
    </plugin>
  </plugins>
</build>

One of the child project contains the following:

<build>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <configuration>
        <annotationProcessorPaths>
          <path>
            <groupId>com.google.dagger</groupId>
            <artifactId>dagger-compiler</artifactId>
            <version>2.24</version>
          </path>
        </annotationProcessorPaths>
      </configuration>
    </plugin>
  </plugins>
</build>

When I run this configuration, I keep getting an org.apache.maven.lifecycle.LifecycleExecutionException:

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project imgn: Fatal error compiling
...
Caused by: org.apache.maven.plugin.MojoExecutionException: Fatal error compiling
...
Caused by: org.codehaus.plexus.compiler.CompilerException: java.lang.NoSuchMethodError: com.squareup.javapoet.ClassName.withoutAnnotations()Lcom/squareup/javapoet/ClassName;
...
Caused by: java.lang.RuntimeException: java.lang.NoSuchMethodError: com.squareup.javapoet.ClassName.withoutAnnotations()Lcom/squareup/javapoet/ClassName;
...
Caused by: java.lang.NoSuchMethodError: com.squareup.javapoet.ClassName.withoutAnnotations()Lcom/squareup/javapoet/ClassName;
    at dagger.internal.codegen.langmodel.DaggerElements.getTypeElement(DaggerElements.java:105)
    at dagger.internal.codegen.InjectBindingRegistryImpl$BindingsCollection.shouldGenerateBinding(InjectBindingRegistryImpl.java:134)
    ...

When I check the dependencies of those artifacts, com.google.auto.value:auto-value:1.6.5 (after checking parents) depends on com.squareup:javapoet:1.9.0, and com.google.dagger:dagger-compiler:2.24 depends on com.squareup:javapoet:1.11.1.

When I check the signature of ClassName::withoutAnnotation in com:squareup:javapoet:1.11.1 is public ClassName withoutAnnotations().

The signature of ClassName::withoutAnnotation in com:squareup:javapoet:1.9.0 is public TypeName withoutAnnotations().

So indeed, there is a clash.

If it were normal dependencies, I'd know to use the <exclusions> tag, but in this case, if I add such tag, I get the following issue: Cannot find 'exclusions' in class org.apache.maven.plugin.compiler.DependencyCoordinate.

So how do I fix such clash in annotationProcessorPaths?

Answer 1

As of version 3.11.0 of the maven-compiler-plugin, you can exclude transitive dependencies for <annotationProcessorPaths> as well:

<annotationProcessorPaths>
  <path>
    <groupId>com.google.auto.value</groupId>
    <artifactId>auto-value</artifactId>
    <version>1.6.5</version>
    <exclusions>
      <exclusion>
        <groupId>com.squareup</groupId>
        <artifactId>javapoet</artifactId>
      </exclusion>
    </exclusions>
  </path>
</annotationProcessorPaths>

See also: MCOMPILER-395