Skip to main content

Remove unused dependencies

org.openrewrite.java.dependencies.RemoveUnusedDependencies

Scans through source code collecting references to types and methods, removing any dependencies that are not used from Maven or Gradle build files. This recipe takes reflective access into account: When reflective access to a class is made unambiguously via a string literal, such as: Class.forName("java.util.List") that is counted correctly. When reflective access to a class is made ambiguously via anything other than a string literal no dependencies will be removed. This recipe takes transitive dependencies into account: When a direct dependency is not used but a transitive dependency it brings in is in use the direct dependency is not removed.

Recipe source​

This recipe is only available to users of Moderne.

This recipe is available under the Moderne Proprietary License.

Example​

Unchanged​
import java.util.List;
import java.util.ArrayList;
public class A {
    List<String> a = new ArrayList<>();
}
Unchanged​
project
Before​
pom.xml
<project>
    <groupId>com.mycompany</groupId>
    <artifactId>app</artifactId>
    <version>1</version>
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>29.0-jre</version>
        </dependency>
    </dependencies>
</project>
After​
pom.xml
<project>
    <groupId>com.mycompany</groupId>
    <artifactId>app</artifactId>
    <version>1</version>
</project>

Usage​

This recipe has no required configuration options. Users of Moderne can run it via the Moderne CLI:

You will need to have configured the Moderne CLI on your machine before you can run the following command.

shell
mod run . --recipe RemoveUnusedDependencies

If the recipe is not available locally, then you can install it using:

mod config recipes jar install org.openrewrite.recipe:rewrite-java-security:3.20.0

See how this recipe works across multiple open-source repositories​

Run this recipe on OSS repos at scale with the Moderne SaaS.

The community edition of the Moderne platform enables you to easily run recipes across thousands of open-source repositories.

Please contact Moderne for more information about safely running the recipes on your own codebase in a private SaaS.

Data Tables​

Dependency usage evidence​

org.openrewrite.java.dependencies.table.DependencyUsageEvidence

Evidence showing that a dependency is in use in the project.

Column NameDescription
GroupThe first part of a dependency coordinate com.google.guava:guava:VERSION.
ArtifactThe second part of a dependency coordinate com.google.guava:guava:VERSION.
VersionThe resolved version.
EvidenceThe evidence showing this dependency is in use (e.g., a type name, property value, or transitive dependency).
Evidence typeThe type of evidence: 'Type usage', 'Property/YAML reference', or 'Transitive dependency'.
Source pathThe path to the source file where the evidence was found.