WIP: Add module-info back in versioned tree?

Author: gselzer

scijava-ops-indexer/pom.xml

@@ -83,7 +83,6 @@
 
 		<license.licenseName>bsd_2</license.licenseName>
 		<license.copyrightOwners>SciJava developers.</license.copyrightOwners>
-		<scijava.jvm.build.version>[11,)</scijava.jvm.build.version>
 
 		<!--
 		NB: Older versions of OpenJDK 11 have a bug in the javadoc tool,
@@ -98,7 +97,7 @@
 		Therefore, we set the minimum build JDK version to 11.0.17 here.
 		-->
 		<scijava.jvm.build.version>[11.0.17,)</scijava.jvm.build.version>
-		<scijava.jvm.version>8</scijava.jvm.version>
+		<scijava.jvm.version>11</scijava.jvm.version>
 
 		<!-- TEMP: Until pom-scijava 38.0.0 is released. -->
 		<scijava-maven-plugin.version>3.0.0</scijava-maven-plugin.version>
@@ -126,6 +125,22 @@
 					-->
 					<proc>none</proc>
 				</configuration>
+				<executions>
+					<execution>
+						<id>compile-java-9+</id>
+						<phase>compile</phase>
+						<goals>
+							<goal>compile</goal>
+						</goals>
+						<configuration>
+							<source>${scijava.jvm.version}</source>
+							<compileSourceRoots>
+								<compileSourceRoot>${project.basedir}/src/main/resources/META-INF/versions/9</compileSourceRoot>
+							</compileSourceRoots>
+							<outputDirectory>${project.build.outputDirectory}/META-INF/versions/9</outputDirectory>
+						</configuration>
+					</execution>
+				</executions>
 			</plugin>
 			<plugin>
 				<artifactId>maven-enforcer-plugin</artifactId>
@@ -145,6 +160,16 @@
 					</execution>
 				</executions>
 			</plugin>
+			<plugin>
+				<artifactId>maven-jar-plugin</artifactId>
+				<configuration>
+					<archive>
+						<manifestEntries>
+							<Multi-Release>true</Multi-Release>
+						</manifestEntries>
+					</archive>
+				</configuration>
+			</plugin>
 			<plugin>
 				<artifactId>maven-javadoc-plugin</artifactId>
 				<configuration>