Include artifact in shaded jar but do not cause dependency for those using the project

Question

This question is very similar to question Maven Include Dependency in Shaded Jar Only.

My problem was that I wanted to have slf4j-simple included in shaded jar as it is meant for standalone execution and needed proper logging.

<dependencies>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.21</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.21</version>
    </dependency>

</dependencies>

I tried using <scope>provided</scope> but then failed to make maven-shade-plugin to include it.

score 1 · Answer 1 · answered Mar 18 '17 at 09:36

The solution I found was using <optional>true</optional> in the dependency declaration. Since scope was enough for me previously, I was unaware of this option.

<dependencies>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.21</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.21</version>
        <optional>true</optional>
    </dependency>

</dependencies>

Include artifact in shaded jar but do not cause dependency for those using the project

1 Answers1