Unable to use kapt to generate querybean in Maven

[cruldra]

Expected behavior

Generate query classes starting with Q for all @entity and compile without errors

Actual behavior

The query class starting with Q (kotlin version) is successfully generated, and an EbeanEntityRegister.java is also generated, which will cause "cannot find Symbol" to appear during compilation

Steps to reproduce

I created a minimal example to reproduce this error, it is located here:
https://github.com/cruldra/ebean-maven-kapt-querybean-example

[rbygrave]

This looks like a kapt bug.

We need to update the gradle example here https://github.com/ebean-orm/examples/tree/master/basic-gradle-kotlin ... and check if we have the same issue with gradle kapt.

[gdoenlen]

@rbygrave I just ran into this. It's because the kotlin compiler is running after javac so the Kotlin classes aren't actually compiled yet. To fix this KAPT probably needs to happen in the process-classes phase or to move kotlin compilation to an earlier phase.

[gdoenlen]

IntelliJ also suggested putting the maven-compiler-plugin AFTER the kotlin compiler plugin and then it worked without changing the KAPT phase:

      <plugin>
        <groupId>org.jetbrains.kotlin</groupId>
        <artifactId>kotlin-maven-plugin</artifactId>
        <version>${kotlin.version}</version>
        <extensions>true</extensions>
        <executions>
          <execution>
            <id>compile</id>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
          <execution>
            <id>test-compile</id>
            <goals>
              <goal>test-compile</goal>
            </goals>
          </execution>
          <execution>
            <id>kapt</id>
            <goals>
              <goal>kapt</goal>
            </goals>
          </execution>
        </executions>
        <dependencies>
          <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-maven-allopen</artifactId>
            <version>${kotlin.version}</version>
          </dependency>
        </dependencies>
        <configuration>
          <javaParameters>true</javaParameters>
          <jvmTarget>25</jvmTarget>
          <compilerPlugins>
            <plugin>all-open</plugin>
          </compilerPlugins>
          <pluginOptions>
            <option>all-open:annotation=jakarta.ws.rs.Path</option>
            <option>all-open:annotation=jakarta.enterprise.context.ApplicationScoped</option>
            <option>all-open:annotation=io.quarkus.test.junit.QuarkusTest</option>
          </pluginOptions>
          <args>
            <arg>-Xexplicit-backing-fields</arg>
          </args>
          <annotationProcessorPaths>
            <path>
              <groupId>io.ebean</groupId>
              <artifactId>kotlin-querybean-generator</artifactId>
              <version>${ebean.version}</version>
            </path>
          </annotationProcessorPaths>
        </configuration>
      </plugin>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>${compiler-plugin.version}</version>
        <executions>
          <execution>
            <id>default-compile</id>
            <phase>none</phase>
          </execution>
          <execution>
            <id>default-testCompile</id>
            <phase>none</phase>
          </execution>
          <execution>
            <id>compile</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
          <execution>
            <id>testCompile</id>
            <phase>test-compile</phase>
            <goals>
              <goal>testCompile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

This does issue warnings though:

[WARNING] Duplicate source root: C:\Users\george\code\target\generated-sources\kaptKotlin\compile\path\to\bean.kt