pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<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>org.example</groupId>
  <artifactId>aardvark</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>aardvark</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.15</maven.compiler.source>
    <maven.compiler.target>1.15</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.antlr/antlr4-runtime -->
    <dependency>
      <groupId>org.antlr</groupId>
      <artifactId>antlr4-runtime</artifactId>
      <version>4.9</version>
    </dependency>

  </dependencies>
  <build>
    <!-- To use the plugin goals in your POM or parent POM -->
    <plugins>
      <plugin>
        <groupId>org.antlr</groupId>
        <artifactId>antlr4-maven-plugin</artifactId>
        <version>4.9</version>
        <executions>
          <execution>
            <id>generate-sources</id>
            <!-- phase generate-test-sources not possible with GrammarTestMojo using ClassLoader focused on /target/classes <phase>generate-test-sources</phase> -->
            <goals>
              <goal>antlr4</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <outputDirectory>${project.build.directory}/generated-sources/antlr4/aardvark</outputDirectory>
          <visitor>true</visitor>
          <sourceDirectory>src/main/antlr4</sourceDirectory>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>