Feat: Add Automatic Module Names to Maven JAR Manifests

maven-artifact/pom.xml

@@ -30,6 +30,10 @@ under the License.
 
   <name>Maven Artifact</name>
 
+  <properties>
+    <moduleNameSuffix>artifact</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>

maven-builder-support/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Builder Support</name>
   <description>Support for descriptor builders (model, setting, toolchains)</description>
 
+  <properties>
+    <moduleNameSuffix>builder</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.junit.jupiter</groupId>

maven-compat/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Compat</name>
   <description>Maven2 classes maintained as compatibility layer.</description>
 
+  <properties>
+    <moduleNameSuffix>compat</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.maven</groupId>

maven-core/pom.xml

@@ -32,6 +32,8 @@ under the License.
   <description>Maven Core classes.</description>
 
   <properties>
+    <moduleNameSuffix>core</moduleNameSuffix>
+
     <!-- Used in filtering of property file defining the versions of the plugins used in lifecycles -->
     <version.maven-ejb-plugin>3.3.0</version.maven-ejb-plugin>
     <version.maven-rar-plugin>3.1.0</version.maven-rar-plugin>

maven-embedder/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Embedder</name>
   <description>Maven embeddable component, with CLI and logging support.</description>
 
+  <properties>
+    <moduleNameSuffix>embedder</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.maven</groupId>

maven-jline/pom.xml

@@ -30,6 +30,10 @@ under the License.
   <name>Maven 3 JLine integration</name>
   <description>Provides the JLine integration in Maven</description>
 
+  <properties>
+    <moduleNameSuffix>jline</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.jline</groupId>

maven-model-builder/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Model Builder</name>
   <description>The effective model builder, with inheritance, profile activation, interpolation, ...</description>
 
+  <properties>
+    <moduleNameSuffix>model.builder</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>

maven-model/pom.xml

@@ -33,6 +33,7 @@ under the License.
 
   <properties>
     <checkstyle.violation.ignore>FileLength</checkstyle.violation.ignore>
+    <moduleNameSuffix>model</moduleNameSuffix>
   </properties>
 
   <dependencies>

maven-plugin-api/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Plugin API</name>
   <description>The API for plugins - Mojos - development.</description>
 
+  <properties>
+    <moduleNameSuffix>plugin</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.maven</groupId>

maven-repository-metadata/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Repository Metadata Model</name>
   <description>Per-directory local and remote repository metadata.</description>
 
+  <properties>
+    <moduleNameSuffix>repository.metadata</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>

maven-resolver-provider/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Artifact Resolver Provider</name>
   <description>Extensions to Maven Resolver for utilizing Maven POM and repository metadata.</description>
 
+  <properties>
+    <moduleNameSuffix>resolver.provider</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.maven</groupId>

maven-settings-builder/pom.xml

@@ -37,6 +37,10 @@ under the License.
     </contributor>
   </contributors>
 
+  <properties>
+    <moduleNameSuffix>settings.builder</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.maven</groupId>

maven-settings/pom.xml

@@ -31,6 +31,10 @@ under the License.
   <name>Maven Settings</name>
   <description>Maven Settings model.</description>
 
+  <properties>
+    <moduleNameSuffix>settings</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>

maven-slf4j-provider/pom.xml

@@ -32,6 +32,10 @@ under the License.
   <description>Maven SLF4J provider based on SLF4J's simple provider, extended to support Maven styled colors
     for levels and stacktraces rendering.</description>
 
+  <properties>
+    <moduleNameSuffix>slf4j.provider</moduleNameSuffix>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.slf4j</groupId>

pom.xml

@@ -158,6 +158,11 @@ under the License.
     <checkstyle.excludes>**/package-info.java</checkstyle.excludes>
     <project.build.outputTimestamp>2026-03-24T21:15:50Z</project.build.outputTimestamp>
     <jlineVersion>3.30.9</jlineVersion>
+
+    <!-- The JPMS module name elements used in the Automatic-Module-Name -->
+    <!-- Note: Maven 3 can never become "pure modular" thing, we leave that to Maven 4+ -->
+    <moduleNamePrefix>${project.groupId}.v3.</moduleNamePrefix>
+    <moduleNameSuffix>invalid</moduleNameSuffix>
   </properties>
 
   <!--bootstrap-start-comment-->
@@ -527,6 +532,21 @@ under the License.
   <build>
     <pluginManagement>
       <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-jar-plugin</artifactId>
+          <configuration>
+            <archive>
+              <manifest>
+                <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
+                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
+              </manifest>
+              <manifestEntries>
+                <Automatic-Module-Name>${moduleNamePrefix}${moduleNameSuffix}</Automatic-Module-Name>
+              </manifestEntries>
+            </archive>
+          </configuration>
+        </plugin>
         <plugin>
           <groupId>org.codehaus.plexus</groupId>
           <artifactId>plexus-component-metadata</artifactId>