Compile module-info.java with Java 9

Author: OpenHelios

pom.xml

@@ -198,7 +198,6 @@
                     </signature>
                 </configuration>
             </plugin>
-
             <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <configuration>
@@ -210,12 +209,65 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.14.0</version>
                 <configuration>
-                    <source>${maven.compiler.target}</source>
-                    <target>${maven.compiler.target}</target>
-                    <testSource>${maven.compiler.testTarget}</testSource>
-                    <testTarget>${maven.compiler.testTarget}</testTarget>
                     <encoding>UTF-8</encoding>
                 </configuration>
+                <executions>
+                    <execution>
+                        <id>default-compile</id>
+                        <configuration>
+                            <release>${maven.compiler.target}</release>
+                            <excludes>
+                                <exclude>module-info.java</exclude>
+                            </excludes>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>default-testCompile</id>
+                        <configuration>
+                            <release>${maven.compiler.testTarget}</release>
+                            <excludes>
+                                <exclude>module-info.java</exclude>
+                            </excludes>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>compile-module-info</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                        <configuration>
+                            <release>9</release>
+                            <excludes>
+                                <exclude>co/**/*.java</exclude>
+                            </excludes>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <!-- remove module-info.class - otherwise compilation of tests fails -->
+            <plugin>
+                <artifactId>maven-clean-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>auto-clean</id>
+                        <phase>process-test-resources</phase>
+                        <goals>
+                            <goal>clean</goal>
+                        </goals>
+                        <configuration>
+                            <excludeDefaultDirectories>true</excludeDefaultDirectories>
+                            <filesets>
+                                <fileset>
+                                    <directory>${project.build.outputDirectory}</directory>
+                                    <includes>
+                                        <include>module-info.class</include>
+                                    </includes>
+                                </fileset>
+                            </filesets>
+                        </configuration>
+                    </execution>
+                </executions>
             </plugin>
             <plugin>
                 <groupId>com.coderplus.maven.plugins</groupId>