You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@maven.apache.org by bm...@apache.org on 2020/12/14 20:33:02 UTC

[maven-jlink-plugin] 01/01: [MJLINK-52] Add classifier support

This is an automated email from the ASF dual-hosted git repository.

bmarwell pushed a commit to branch MJLINK-52
in repository https://gitbox.apache.org/repos/asf/maven-jlink-plugin.git

commit 209282f5bd1f6aef07d08fece1e6a100d0503c7c
Author: Benjamin Marwell <bm...@apache.org>
AuthorDate: Thu Nov 26 07:12:00 2020 +0100

    [MJLINK-52] Add classifier support
    
    Signed-off-by: Benjamin Marwell <bm...@apache.org>
---
 .../MJLINK-52_classifiers/invoker.properties       | 18 +++++
 src/it/projects/MJLINK-52_classifiers/pom.xml      | 54 ++++++++++++++
 .../src/main/java/com/corporate/project/Main.java  | 35 +++++++++
 .../src/main/java/module-info.java                 | 24 ++++++
 .../projects/MJLINK-52_classifiers/verify.groovy   | 48 ++++++++++++
 .../invoker.properties                             | 18 +++++
 .../pom.xml                                        | 71 ++++++++++++++++++
 .../src/main/java/com/corporate/project/Main.java  | 35 +++++++++
 .../src/main/java/module-info.java                 | 24 ++++++
 .../verify.groovy                                  | 47 ++++++++++++
 .../invoker.properties                             | 19 +++++
 .../pom.xml                                        | 64 ++++++++++++++++
 .../src/main/java/com/corporate/project/Main.java  | 35 +++++++++
 .../src/main/java/module-info.java                 | 24 ++++++
 .../verify.groovy                                  | 47 ++++++++++++
 .../invoker.properties                             | 18 +++++
 .../MJLINK-52_classifiers_jarproject/pom.xml       | 63 ++++++++++++++++
 .../src/main/java/com/corporate/project/Main.java  | 35 +++++++++
 .../src/main/java/module-info.java                 | 24 ++++++
 .../MJLINK-52_classifiers_jarproject/verify.groovy | 55 ++++++++++++++
 .../maven/plugins/jlink/AbstractJLinkMojo.java     |  8 +-
 .../org/apache/maven/plugins/jlink/JLinkMojo.java  | 85 ++++++++++++++++++++--
 22 files changed, 842 insertions(+), 9 deletions(-)

diff --git a/src/it/projects/MJLINK-52_classifiers/invoker.properties b/src/it/projects/MJLINK-52_classifiers/invoker.properties
new file mode 100644
index 0000000..8948d9b
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers/invoker.properties
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+invoker.java.version = 1.9+
+invoker.goals = clean package
diff --git a/src/it/projects/MJLINK-52_classifiers/pom.xml b/src/it/projects/MJLINK-52_classifiers/pom.xml
new file mode 100644
index 0000000..1b1ea17
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers/pom.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements. See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership. The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License. You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied. See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
+>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.apache.maven.plugins</groupId>
+  <artifactId>maven-jlink-plugin-mjlink-52</artifactId>
+  <version>96.0</version>
+  <packaging>jlink</packaging>
+  <name>Maven</name>
+  <url>https://maven.apache.org</url>
+  <description>Test JLink creates archives with classifiers.</description>
+  <properties>
+    <maven.compiler.release>9</maven.compiler.release>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.0</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jlink-plugin</artifactId>
+        <version>@project.version@</version>
+        <extensions>true</extensions>
+        <configuration>
+          <classifier>jlink</classifier>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/src/it/projects/MJLINK-52_classifiers/src/main/java/com/corporate/project/Main.java b/src/it/projects/MJLINK-52_classifiers/src/main/java/com/corporate/project/Main.java
new file mode 100644
index 0000000..1b4ca36
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers/src/main/java/com/corporate/project/Main.java
@@ -0,0 +1,35 @@
+package com.corporate.project;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+public class Main
+{
+    public static void main( String[] args )
+    {
+        System.out.println( "Main one from Java 9+" );
+        if ( args.length > 0 )
+        {
+            for ( String arg : args )
+            {
+                System.out.println( " Arg: '" + arg + "'" );
+            }
+        }
+    }
+}
diff --git a/src/it/projects/MJLINK-52_classifiers/src/main/java/module-info.java b/src/it/projects/MJLINK-52_classifiers/src/main/java/module-info.java
new file mode 100644
index 0000000..d35441d
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers/src/main/java/module-info.java
@@ -0,0 +1,24 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+module com.corporate.project {
+  requires java.base;
+  exports com.corporate.project;
+}
diff --git a/src/it/projects/MJLINK-52_classifiers/verify.groovy b/src/it/projects/MJLINK-52_classifiers/verify.groovy
new file mode 100644
index 0000000..8975fe5
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers/verify.groovy
@@ -0,0 +1,48 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.io.*;
+import java.util.*;
+import java.util.jar.*;
+import org.codehaus.plexus.util.*;
+
+try
+{
+    File target = new File( basedir, "target" )
+    if ( !target.exists() || !target.isDirectory() )
+    {
+        System.err.println( "target file is missing or not a directory." )
+        return false
+    }
+
+    File artifact = new File( target, "maven-jlink-plugin-mjlink-52-96.0-jlink.zip" )
+    if ( !artifact.exists() || artifact.isDirectory() )
+    {
+        System.err.println( "maven-jlink-plugin-mjlink-52-96.0-jlink.zip file is missing or is a directory." )
+        return false
+    }
+
+    return true
+}
+catch( Throwable e )
+{
+    e.printStackTrace()
+    return false
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/invoker.properties b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/invoker.properties
new file mode 100644
index 0000000..8948d9b
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/invoker.properties
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+invoker.java.version = 1.9+
+invoker.goals = clean package
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/pom.xml b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/pom.xml
new file mode 100644
index 0000000..2ccb413
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/pom.xml
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements. See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership. The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License. You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied. See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
+>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.apache.maven.plugins</groupId>
+  <artifactId>maven-jlink-plugin-mjlink-52</artifactId>
+  <version>96.0</version>
+  <packaging>jar</packaging>
+  <name>Maven</name>
+  <url>https://maven.apache.org</url>
+  <description>Test JLink does not fail on duplicate classifiers.</description>
+  <properties>
+    <maven.compiler.release>9</maven.compiler.release>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.0</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jlink-plugin</artifactId>
+        <version>@project.version@</version>
+        <executions>
+          <execution>
+            <id>primary-jlink</id>
+            <goals>
+              <goal>jlink</goal>
+            </goals>
+            <configuration>
+              <classifier>jlink1</classifier>
+            </configuration>
+          </execution>
+          <execution>
+            <id>secondary-jlink</id>
+            <phase>package</phase>
+            <goals>
+              <goal>jlink</goal>
+            </goals>
+            <configuration>
+              <classifier>jlink1</classifier>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/src/main/java/com/corporate/project/Main.java b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/src/main/java/com/corporate/project/Main.java
new file mode 100644
index 0000000..1b4ca36
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/src/main/java/com/corporate/project/Main.java
@@ -0,0 +1,35 @@
+package com.corporate.project;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+public class Main
+{
+    public static void main( String[] args )
+    {
+        System.out.println( "Main one from Java 9+" );
+        if ( args.length > 0 )
+        {
+            for ( String arg : args )
+            {
+                System.out.println( " Arg: '" + arg + "'" );
+            }
+        }
+    }
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/src/main/java/module-info.java b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/src/main/java/module-info.java
new file mode 100644
index 0000000..d35441d
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/src/main/java/module-info.java
@@ -0,0 +1,24 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+module com.corporate.project {
+  requires java.base;
+  exports com.corporate.project;
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/verify.groovy b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/verify.groovy
new file mode 100644
index 0000000..9cfed2d
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_classifier/verify.groovy
@@ -0,0 +1,47 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.io.*;
+import java.util.*;
+import java.util.jar.*;
+import org.codehaus.plexus.util.*;
+
+try
+{
+    File target = new File( basedir, "target" );
+    if ( !target.exists() || !target.isDirectory() )
+    {
+        System.err.println( "target file is missing or not a directory." );
+        return false;
+    }
+    File artifact = new File( target, "maven-jlink-plugin-mjlink-52-96.0-jlink1.zip" );
+    if ( !artifact.exists() || artifact.isDirectory() )
+    {
+        System.err.println( "maven-jlink-plugin-mjlink-52-96.0-jlink1.zip file is missing or is a directory." );
+        return false;
+    }
+
+    return true;
+}
+catch( Throwable e )
+{
+    e.printStackTrace();
+    return false;
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_default/invoker.properties b/src/it/projects/MJLINK-52_classifiers_duplicate_default/invoker.properties
new file mode 100644
index 0000000..594aefa
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_default/invoker.properties
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+invoker.java.version = 1.9+
+invoker.goals = clean package
+invoker.buildResult = failure
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_default/pom.xml b/src/it/projects/MJLINK-52_classifiers_duplicate_default/pom.xml
new file mode 100644
index 0000000..e739b8f
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_default/pom.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements. See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership. The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License. You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied. See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
+>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.apache.maven.plugins</groupId>
+  <artifactId>maven-jlink-plugin-mjlink-52</artifactId>
+  <version>96.0</version>
+  <packaging>jlink</packaging>
+  <name>Maven</name>
+  <url>https://maven.apache.org</url>
+  <description>Test JLink fails on duplicate default artifact.</description>
+  <properties>
+    <maven.compiler.release>9</maven.compiler.release>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.0</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jlink-plugin</artifactId>
+        <version>@project.version@</version>
+        <extensions>true</extensions>
+        <executions>
+          <execution>
+            <id>default-jlink</id>
+          </execution>
+          <execution>
+            <!-- this execution must fail because a default artifact may not be attached twice. -->
+            <id>secondary-jlink</id>
+            <phase>package</phase>
+            <goals>
+              <goal>jlink</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_default/src/main/java/com/corporate/project/Main.java b/src/it/projects/MJLINK-52_classifiers_duplicate_default/src/main/java/com/corporate/project/Main.java
new file mode 100644
index 0000000..1b4ca36
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_default/src/main/java/com/corporate/project/Main.java
@@ -0,0 +1,35 @@
+package com.corporate.project;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+public class Main
+{
+    public static void main( String[] args )
+    {
+        System.out.println( "Main one from Java 9+" );
+        if ( args.length > 0 )
+        {
+            for ( String arg : args )
+            {
+                System.out.println( " Arg: '" + arg + "'" );
+            }
+        }
+    }
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_default/src/main/java/module-info.java b/src/it/projects/MJLINK-52_classifiers_duplicate_default/src/main/java/module-info.java
new file mode 100644
index 0000000..d35441d
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_default/src/main/java/module-info.java
@@ -0,0 +1,24 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+module com.corporate.project {
+  requires java.base;
+  exports com.corporate.project;
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_duplicate_default/verify.groovy b/src/it/projects/MJLINK-52_classifiers_duplicate_default/verify.groovy
new file mode 100644
index 0000000..77f05f8
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_duplicate_default/verify.groovy
@@ -0,0 +1,47 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.io.*;
+import java.util.*;
+import java.util.jar.*;
+import org.codehaus.plexus.util.*;
+
+try
+{
+    File target = new File( basedir, "target" );
+    if ( !target.exists() || !target.isDirectory() )
+    {
+        System.err.println( "target file is missing or not a directory." );
+        return false;
+    }
+    File artifact = new File( target, "maven-jlink-plugin-mjlink-52-96.0.zip" );
+    if ( !artifact.exists() || artifact.isDirectory() )
+    {
+        System.err.println( "maven-jlink-plugin-mjlink-52-96.0.zip file is missing or is a directory." );
+        return false;
+    }
+
+    return true;
+}
+catch( Throwable e )
+{
+    e.printStackTrace();
+    return false;
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_jarproject/invoker.properties b/src/it/projects/MJLINK-52_classifiers_jarproject/invoker.properties
new file mode 100644
index 0000000..8948d9b
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_jarproject/invoker.properties
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+invoker.java.version = 1.9+
+invoker.goals = clean package
diff --git a/src/it/projects/MJLINK-52_classifiers_jarproject/pom.xml b/src/it/projects/MJLINK-52_classifiers_jarproject/pom.xml
new file mode 100644
index 0000000..4858354
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_jarproject/pom.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements. See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership. The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License. You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied. See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
+>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.apache.maven.plugins</groupId>
+  <artifactId>maven-jlink-plugin-mjlink-52</artifactId>
+  <version>96.0</version>
+  <packaging>jar</packaging>
+  <name>Maven</name>
+  <url>https://maven.apache.org</url>
+  <description>Test JLink creates an additional archive with classifiers on a jar-packaged project.</description>
+  <properties>
+    <maven.compiler.release>9</maven.compiler.release>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.0</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jlink-plugin</artifactId>
+        <version>@project.version@</version>
+        <extensions>true</extensions>
+        <executions>
+          <execution>
+            <id>create-dist</id>
+            <phase>package</phase>
+            <goals>
+              <goal>jlink</goal>
+            </goals>
+            <configuration>
+              <classifier>jlink</classifier>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/src/it/projects/MJLINK-52_classifiers_jarproject/src/main/java/com/corporate/project/Main.java b/src/it/projects/MJLINK-52_classifiers_jarproject/src/main/java/com/corporate/project/Main.java
new file mode 100644
index 0000000..1b4ca36
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_jarproject/src/main/java/com/corporate/project/Main.java
@@ -0,0 +1,35 @@
+package com.corporate.project;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+public class Main
+{
+    public static void main( String[] args )
+    {
+        System.out.println( "Main one from Java 9+" );
+        if ( args.length > 0 )
+        {
+            for ( String arg : args )
+            {
+                System.out.println( " Arg: '" + arg + "'" );
+            }
+        }
+    }
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_jarproject/src/main/java/module-info.java b/src/it/projects/MJLINK-52_classifiers_jarproject/src/main/java/module-info.java
new file mode 100644
index 0000000..d35441d
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_jarproject/src/main/java/module-info.java
@@ -0,0 +1,24 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+module com.corporate.project {
+  requires java.base;
+  exports com.corporate.project;
+}
diff --git a/src/it/projects/MJLINK-52_classifiers_jarproject/verify.groovy b/src/it/projects/MJLINK-52_classifiers_jarproject/verify.groovy
new file mode 100644
index 0000000..1f45c22
--- /dev/null
+++ b/src/it/projects/MJLINK-52_classifiers_jarproject/verify.groovy
@@ -0,0 +1,55 @@
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.io.*;
+import java.util.*;
+import java.util.jar.*;
+import org.codehaus.plexus.util.*;
+
+try
+{
+    File target = new File( basedir, "target" )
+    if ( !target.exists() || !target.isDirectory() )
+    {
+        System.err.println( "target file is missing or not a directory." )
+        return false
+    }
+
+    File primaryArtifact = new File( target, "maven-jlink-plugin-mjlink-52-96.0.jar" )
+    if ( !primaryArtifact.exists() || primaryArtifact.isDirectory() )
+    {
+        System.err.println( "maven-jlink-plugin-mjlink-52-96.0.jar file is missing or is a directory." )
+        return false
+    }
+
+    File jlinkArtifact = new File( target, "maven-jlink-plugin-mjlink-52-96.0-jlink.zip" )
+    if ( !jlinkArtifact.exists() || jlinkArtifact.isDirectory() )
+    {
+        System.err.println( "maven-jlink-plugin-mjlink-52-96.0-jlink.zip file is missing or is a directory." )
+        return false
+    }
+
+    return true
+}
+catch( Throwable e )
+{
+    e.printStackTrace()
+    return false
+}
diff --git a/src/main/java/org/apache/maven/plugins/jlink/AbstractJLinkMojo.java b/src/main/java/org/apache/maven/plugins/jlink/AbstractJLinkMojo.java
index 74bef13..16542a0 100644
--- a/src/main/java/org/apache/maven/plugins/jlink/AbstractJLinkMojo.java
+++ b/src/main/java/org/apache/maven/plugins/jlink/AbstractJLinkMojo.java
@@ -59,6 +59,12 @@ public abstract class AbstractJLinkMojo
     @Component
     private ToolchainManager toolchainManager;
 
+    /**
+     * Overload this to produce a zip with another classifier, for example a jlink-zip.
+     * @return get the classifier.
+     */
+    protected abstract String getClassifier();
+
     protected JLinkExecutor getJlinkExecutor()
     {
         return new JLinkExecutor( getToolchain().orElse( null ), getLog() );
@@ -167,7 +173,7 @@ public abstract class AbstractJLinkMojo
     protected boolean hasClassifier( String classifier )
     {
         boolean result = false;
-        if ( classifier != null && classifier.trim().length() > 0 )
+        if ( classifier != null && !classifier.isEmpty() )
         {
             result = true;
         }
diff --git a/src/main/java/org/apache/maven/plugins/jlink/JLinkMojo.java b/src/main/java/org/apache/maven/plugins/jlink/JLinkMojo.java
index 3e7a63a..f8ff013 100644
--- a/src/main/java/org/apache/maven/plugins/jlink/JLinkMojo.java
+++ b/src/main/java/org/apache/maven/plugins/jlink/JLinkMojo.java
@@ -41,6 +41,7 @@ import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.plugins.annotations.ResolutionScope;
 import org.apache.maven.project.MavenProject;
+import org.apache.maven.project.MavenProjectHelper;
 import org.apache.maven.toolchain.Toolchain;
 import org.apache.maven.toolchain.java.DefaultJavaToolChain;
 import org.codehaus.plexus.archiver.Archiver;
@@ -151,8 +152,11 @@ public class JLinkMojo
     /**
      * The output directory for the resulting Run Time Image. The created Run Time Image is stored in non compressed
      * form. This will later being packaged into a <code>zip</code> file. <code>--output &lt;path&gt;</code>
+     *
+     * <p>The {@link #classifier} is appended as a subdirecty if it exists,
+     * otherwise {@code default} will be used as subdirectory.
+     * This ensures that multiple executions using classifiers will not overwrite the previous run’s image.</p>
      */
-    // TODO: is this a good final location?
     @Parameter( defaultValue = "${project.build.directory}/maven-jlink", required = true, readonly = true )
     private File outputDirectoryImage;
 
@@ -266,17 +270,34 @@ public class JLinkMojo
     private File sourceJdkModules;
 
     /**
+     * Classifier to add to the artifact generated. If given, the artifact will be attached
+     * as a supplemental artifact.
+     * If not given this will create the main artifact which is the default behavior.
+     * If you try to do that a second time without using a classifier the build will fail.
+     */
+    @Parameter
+    private String classifier;
+
+    /**
      * Name of the generated ZIP file in the <code>target</code> directory. This will not change the name of the
      * installed/deployed file.
      */
     @Parameter( defaultValue = "${project.build.finalName}", readonly = true )
     private String finalName;
 
+    /**
+     * Convenience interface for plugins to add or replace artifacts and resources on projects.
+     */
+    @Component
+    private MavenProjectHelper projectHelper;
+
     @Override
     public void execute() throws MojoExecutionException, MojoFailureException
     {
         failIfParametersAreNotInTheirValidValueRanges();
 
+        setOutputDirectoryImage();
+
         ifOutputDirectoryExistsDelteIt();
 
         JLinkExecutor jLinkExec = getExecutor();
@@ -321,13 +342,19 @@ public class JLinkMojo
 
         File createZipArchiveFromImage = createZipArchiveFromImage( buildDirectory, outputDirectoryImage );
 
-        if ( projectHasAlreadySetAnArtifact() )
+        if ( hasClassifier() )
         {
-            throw new MojoExecutionException( "You have to use a classifier "
-                            + "to attach supplemental artifacts to the project instead of replacing them." );
+            projectHelper.attachArtifact( getProject(), "jlink", getClassifier(), createZipArchiveFromImage );
+        }
+        else
+        {
+            if ( projectHasAlreadySetAnArtifact() )
+            {
+                throw new MojoExecutionException( "You have to use a classifier "
+                        + "to attach supplemental artifacts to the project instead of replacing them." );
+            }
+            getProject().getArtifact().setFile( createZipArchiveFromImage );
         }
-
-        getProject().getArtifact().setFile( createZipArchiveFromImage );
     }
 
     private List<File> getCompileClasspathElements( MavenProject project )
@@ -428,7 +455,7 @@ public class JLinkMojo
         return getJlinkExecutor();
     }
 
-    private boolean projectHasAlreadySetAnArtifact()
+    private boolean projectHasAlreadySetAnArtifact( )
     {
         if ( getProject().getArtifact().getFile() != null )
         {
@@ -440,12 +467,26 @@ public class JLinkMojo
         }
     }
 
+    /**
+     * @return true in case where the classifier is not {@code null} and contains something else than white spaces.
+     */
+    protected boolean hasClassifier()
+    {
+        boolean result = false;
+        if ( getClassifier() != null && !getClassifier().isEmpty() )
+        {
+            result = true;
+        }
+
+        return result;
+    }
+
     private File createZipArchiveFromImage( File outputDirectory, File outputDirectoryImage )
         throws MojoExecutionException
     {
         zipArchiver.addDirectory( outputDirectoryImage );
 
-        File resultArchive = getArchiveFile( outputDirectory, finalName, null, "zip" );
+        File resultArchive = getArchiveFile( outputDirectory, finalName, getClassifier(), "zip" );
 
         zipArchiver.setDestFile( resultArchive );
         try
@@ -486,6 +527,25 @@ public class JLinkMojo
         }
     }
 
+    /**
+     * Use a separate directory for each image.
+     *
+     * <p>Rationale: If a user creates multiple jlink artifacts using classifiers,
+     * the directories should not overwrite themselves for each execution.</p>
+     */
+    private void setOutputDirectoryImage()
+    {
+        if ( hasClassifier() )
+        {
+            final File classifiersDirectory = new File( outputDirectoryImage, "classifiers" );
+            outputDirectoryImage = new File( classifiersDirectory, classifier );
+        }
+        else
+        {
+            outputDirectoryImage = new File( outputDirectoryImage, "default" );
+        }
+    }
+
     private void ifOutputDirectoryExistsDelteIt()
         throws MojoExecutionException
     {
@@ -633,4 +693,13 @@ public class JLinkMojo
     {
         return limitModules != null && !limitModules.isEmpty();
     }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected String getClassifier()
+    {
+        return classifier;
+    }
+
 }