Avro sources (avsc, avpr, avdl) should be located in: src/main/avro
Here is a example project:
<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.spf4j</groupId>
<artifactId>test-schema</artifactId>
<packaging>jar</packaging>
<version>1.0</version>
<name>maven-avro-schema-plugin-8.9.3-SNAPSHOT</name>
<build>
<plugins>
<plugin>
<groupId>org.spf4j</groupId>
<artifactId>maven-avro-schema-plugin</artifactId>
<extensions>true</extensions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>@avro.version@</version>
</dependency>
<dependency> <!-- reuse an existing data model-->
<groupId>org.spf4j</groupId>
<artifactId>test-schema-common</artifactId>
<version>1.0</version>
</dependency>
<dependency> <!-- zolyfarkas/avro fork generated classes use @Nullable/@Nonnull -->
<groupId>com.google.code.findbugs</groupId>
<artifactId>jsr305</artifactId>
<version>3.0.2</version>
</dependency>
</dependencies>
</project><?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.spf4j.avro.examples</groupId>
<artifactId>test-schema</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>maven-avro-schema-plugin-8.9.3-SNAPSHOT</name>
<description>Avro schema example</description>
<parent>
<groupId>org.spf4j.avro</groupId>
<artifactId>avro-schema-parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.spf4j.avro.examples</groupId>
<artifactId>test-schema-common</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>