[MNG-8053] Profile activation by packaging in the POM (#1410)

api/maven-api-model/src/main/mdo/maven.mdo

@@ -2771,6 +2771,12 @@
             <type>ActivationFile</type>
           </association>
         </field>
+        <field>
+          <name>packaging</name>
+          <version>4.1.0+</version>
+          <type>String</type>
+          <description>Specifies that this profile will be activated based on the project's packaging.</description>
+        </field>
         <!--
         This could be included once we teach Maven to deal with multiple versions of the model
         <field>

api/maven-api-settings/src/main/mdo/settings.mdo

@@ -728,6 +728,14 @@
             <type>ActivationFile</type>
           </association>
         </field>
+        <field>
+          <name>packaging</name>
+          <version>1.2.0+</version>
+          <type>String</type>
+          <description>
+            Specifies that this profile will be activated based on the project's packaging.
+          </description>
+        </field>
       </fields>
     </class>
 

maven-core/src/main/java/org/apache/maven/settings/SettingsUtils.java

@@ -65,19 +65,6 @@ public final class SettingsUtils {
             return null;
         }
 
-        Settings clone = new Settings();
+        return new Settings(settings.getDelegate());
-        clone.setActiveProfiles(settings.getActiveProfiles());
-        clone.setInteractiveMode(settings.isInteractiveMode());
-        clone.setLocalRepository(settings.getLocalRepository());
-        clone.setMirrors(settings.getMirrors());
-        clone.setOffline(settings.isOffline());
-        clone.setPluginGroups(settings.getPluginGroups());
-        clone.setProfiles(settings.getProfiles());
-        clone.setProxies(settings.getProxies());
-        clone.setServers(settings.getServers());
-        clone.setSourceLevel(settings.getSourceLevel());
-        clone.setUsePluginRegistry(settings.isUsePluginRegistry());
-
-        return clone;
     }
 }

maven-core/src/main/java/org/apache/maven/settings/SettingsUtilsV4.java

@@ -125,6 +125,8 @@ public final class SettingsUtilsV4 {
                 activation.file(file);
             }
 
+            activation.packaging(modelActivation.getPackaging());
+
             profile.activation(activation.build());
         }
 
@@ -208,6 +210,8 @@ public final class SettingsUtilsV4 {
                         .build());
             }
 
+            activation.packaging(settingsActivation.getPackaging());
+
             profile.activation(activation.build());
         }
 

maven-core/src/test/java/org/apache/maven/settings/SettingsUtilsTest.java

@@ -83,6 +83,7 @@ class SettingsUtilsTest {
                 .file(af)
                 .property(ap)
                 .os(ao)
+                .packaging("pom")
                 .build();
         Map<String, String> props = new HashMap<>();
         int count = entropy.nextInt(10);
@@ -145,6 +146,7 @@ class SettingsUtilsTest {
         assertEquals(
                 p.getActivation().getOs().getVersion(),
                 clone.getActivation().getOs().getVersion());
+        assertEquals(p.getActivation().getPackaging(), clone.getActivation().getPackaging());
         assertEquals(p.getProperties(), clone.getProperties());
         assertEquals(p.getRepositories().size(), clone.getRepositories().size());
         // TODO deep compare the lists

maven-model-builder/src/main/java/org/apache/maven/model/profile/activation/PackagingProfileActivator.java

@@ -0,0 +1,62 @@
+/*
+ * 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.
+ */
+package org.apache.maven.model.profile.activation;
+
+import javax.inject.Named;
+import javax.inject.Singleton;
+
+import java.util.Objects;
+import java.util.Optional;
+
+import org.apache.maven.api.model.Activation;
+import org.apache.maven.api.model.Profile;
+import org.apache.maven.model.building.ModelProblemCollector;
+import org.apache.maven.model.profile.ProfileActivationContext;
+
+/**
+ * Determines profile activation based on the project's packaging.
+ */
+@Named("packaging")
+@Singleton
+public class PackagingProfileActivator implements ProfileActivator {
+
+    @Override
+    public boolean isActive(
+            org.apache.maven.model.Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
+        return getActivationPackaging(profile).map(p -> isPackaging(context, p)).orElse(false);
+    }
+
+    @Override
+    public boolean presentInConfig(
+            org.apache.maven.model.Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
+        return getActivationPackaging(profile).isPresent();
+    }
+
+    private static boolean isPackaging(ProfileActivationContext context, String p) {
+        String packaging = context.getUserProperties().get(ProfileActivationContext.PROPERTY_NAME_PACKAGING);
+        return Objects.equals(p, packaging);
+    }
+
+    private static Optional<String> getActivationPackaging(org.apache.maven.model.Profile profile) {
+        return Optional.ofNullable(profile)
+                .map(org.apache.maven.model.Profile::getDelegate)
+                .map(Profile::getActivation)
+                .map(Activation::getPackaging);
+    }
+}