I have a monorepo that has multiple executable classes and their shared dependencies. I can create JARs with dependencies so that they can easily be deployed and executed. However, all of the compiled JARs seem to include all of the classes from the repo, even classes that are not required (neither directly nor indirectly) by a specific main class.

Can I tell Maven to just include those classes that are actual dependencies of a the main class I’m compiling to an executable JAR?

My pom.xml looks something like this:

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example.tools</groupId>
  <artifactId>tools</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>Tools</name>
  <description>Tools we use</description>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13</version>
    </dependency>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.10.1</version>
    </dependency>
    <!-- More dependencies... -->
  </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
    <profiles>
        <profile>
            <id>Tool1</id>
            <build>
                <plugins>
                    <plugin>
                        <artifactId>maven-assembly-plugin</artifactId>
                        <configuration>
                            <finalName>Tool1</finalName>
                            <outputDirectory>bin</outputDirectory>
                            <archive>
                                <manifest>
                                    <mainClass>com.example.tools.Tool1</mainClass>
                                </manifest>
                            </archive>
                            <descriptorRefs>
                                <descriptorRef>jar-with-dependencies</descriptorRef>
                            </descriptorRefs>
                            <appendAssemblyId>false</appendAssemblyId>
                        </configuration>
                        <executions>
                            <execution>
                                <id>make-assembly</id>
                                <phase>package</phase>
                                <goals>
                                    <goal>single</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
        <profile>
            <id>Tool1</id>
            <build>
                <plugins>
                    <plugin>
                        <artifactId>maven-assembly-plugin</artifactId>
                        <configuration>
                            <finalName>Tool2</finalName>
                            <outputDirectory>bin</outputDirectory>
                            <archive>
                                <manifest>
                                    <mainClass>com.example.tools.Tool2</mainClass>
                                </manifest>
                            </archive>
                            <descriptorRefs>
                                <descriptorRef>jar-with-dependencies</descriptorRef>
                            </descriptorRefs>
                            <appendAssemblyId>false</appendAssemblyId>
                        </configuration>
                        <executions>
                            <execution>
                                <id>make-assembly</id>
                                <phase>package</phase>
                                <goals>
                                    <goal>single</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
        <!-- More profiles... -->
    </profiles>
</project>