Generate code from java and scala generator and compile them in Maven build - grant-guo/Ideas GitHub Wiki

Three Maven plugins help accomplish this:

org.codehaus.mojo/exec-maven-plugin is used to run Java and Scala executables

org.apache.maven.plugins/maven-compiler-plugin is used to compile the Java generator sources

net.alchim31.maven/scala-maven-plugin is used to compile the Scala generator sources

The basic ideas are

  1. at generate-sources phase, run compile goal to compile the Java/Scala generators, also need to include all sources on which the generators depend
  2. run Java/Scala generators at process-sources phase to generate the sources
  3. run add-sources goal to add the directories where the sources are generated into the compiler path
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>3.1.0</version>
                <executions>
                    <execution>
                        <id>generate-codes-java</id>
                        <goals>
                            <goal>exec</goal>
                        </goals>
                        <phase>process-sources</phase>
                        <configuration>
                            <executable>${env.JAVA_HOME}/bin/java</executable>
                            <arguments>
                                <argument>-classpath</argument>
                                <classpath/>
                                <argument>${generator class full name}</argument>
                            </arguments>
                            <addResourcesToClasspath>true</addResourcesToClasspath>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>3.1.0</version>
                <executions>
                    <execution>
                        <id>generate-codes-scala</id>
                        <goals>
                            <goal>exec</goal>
                        </goals>
                        <phase>process-sources</phase>
                        <configuration>
                            <executable>${env.JAVA_HOME}/bin/java</executable>
                            <arguments>
                                <argument>${if any arguments}</argument>
                                <argument>-classpath</argument>
                                <classpath/>
                                <argument>${scala generator class full name}</argument>
                            </arguments>
                            <addResourcesToClasspath>true</addResourcesToClasspath>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.11.0</version>
                <executions>
                    <execution>
                        <id>compile-java-generator</id>
                        <phase>generate-sources</phase>
                        <goals><goal>compile</goal></goals>
                        <configuration>
                            <includes>
                                <include>${dependencies of generator class, }</include>
                                <include>com/grant/generator/**</include>
                            </includes>
                        </configuration>
                    </execution>
                </executions>
                <configuration>
                    <source>17</source>
                    <target>17</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>

            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>4.8.1</version>
                <executions>
                    <execution>
                        <id>compile-scala-generator</id>
                        <phase>generate-sources</phase>
                        <goals><goal>compile</goal></goals>
                        <configuration>
                            <includes>
                                <include>com/grant/guo/generator/**</include>
                            </includes>
                        </configuration>
                    </execution>
                    <execution>
                        <id>add-generated-sources-java</id>
                        <goals>
                            <goal>add-source</goal>
                        </goals>
                        <configuration>
                            <sourceDir>${project.basedir}/target/generated-sources-java</sourceDir>
                        </configuration>
                    </execution>
                    <execution>
                        <id>add-generated-sources</id>
                        <goals>
                            <goal>add-source</goal>
                        </goals>
                        <configuration>
                            <sourceDir>${project.basedir}/target/generated-sources-scala</sourceDir>
                        </configuration>
                    </execution>
                </executions>
                <configuration>
                    <args>
                        <arg>-unchecked</arg>
                        <arg>-deprecation</arg>
                        <arg>-explaintypes</arg>
                    </args>
                    <jvmArgs>
                        <jvmArg>-Xms64m</jvmArg>
                        <jvmArg>-Xmx1024m</jvmArg>
                    </jvmArgs>
                    <recompileMode>incremental</recompileMode>
                </configuration>
            </plugin>
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