src/it/jar-classifier/pom.xml

<?xml version="1.0" encoding="UTF-8"?>
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<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.apache.maven.its.ejb</groupId>
  <artifactId>jar-classifier</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>Test for jar with classifier</name>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-source-plugin</artifactId>
        <version>@project.version@</version>
        <configuration>
          <classifier>foo</classifier>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-antrun-plugin</artifactId>
        <version>1.3</version>
        <executions>
          <execution>
            <id>generated-sources</id>
            <phase>generate-sources</phase>
            <goals>
              <goal>run</goal>
            </goals>
            <configuration>
              <tasks>
                <touch file="target/generated-sources/ant/generated.properties" mkdirs="true"/>
              </tasks>
              <sourceRoot>target/generated-sources/ant</sourceRoot>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

</project>