michael-o commented on a change in pull request #429:
URL: https://github.com/apache/maven/pull/429#discussion_r567250499



##########
File path: 
maven-core/src/main/java/org/apache/maven/execution/MavenExecutionRequest.java
##########
@@ -277,22 +277,62 @@
 
     MavenExecutionRequest setProfiles( List<Profile> profiles );
 
+    /**
+     * @deprecated Use {@link #getProfileActivation()}.

Review comment:
       I think the link should point to a method would can suitably replace a 
deprecated one, if possible.

##########
File path: maven-core/src/main/java/org/apache/maven/DefaultMaven.java
##########
@@ -493,22 +505,88 @@ private void 
validatePrerequisitesForNonMavenPluginProjects( List<MavenProject>
         }
     }
 
-    private void validateActivatedProfiles( List<MavenProject> projects, 
List<String> activeProfileIds )
+    /**
+     * Get all profiles that are detected in either the projects, any parent 
of the projects or the settings.
+     * @param session The Maven session
+     * @return A {@link Set} of profile identifiers, never {@code null}.
+     */
+    private Set<String> getAllProfiles( MavenSession session )
     {
-        Collection<String> notActivatedProfileIds = new LinkedHashSet<>( 
activeProfileIds );
-
-        for ( MavenProject project : projects )
+        final Set<MavenProject> projectsIncludingParents = new HashSet<>();
+        for ( MavenProject project : session.getProjects() )
         {
-            for ( List<String> profileIds : 
project.getInjectedProfileIds().values() )
+            boolean isAdded = projectsIncludingParents.add( project );
+            MavenProject parent = project.getParent();
+            while ( isAdded && parent != null )
             {
-                notActivatedProfileIds.removeAll( profileIds );
+                isAdded = projectsIncludingParents.add( parent );
+                parent = parent.getParent();
             }
         }
 
-        for ( String notActivatedProfileId : notActivatedProfileIds )
+        final Stream<String> projectProfiles = 
projectsIncludingParents.stream()
+                .map( MavenProject::getModel )
+                .map( Model::getProfiles )
+                .flatMap( Collection::stream )
+                .map( Profile::getId );
+        final Stream<String> settingsProfiles = 
session.getSettings().getProfiles().stream()
+                .map( org.apache.maven.settings.Profile::getId );
+
+        return Stream.concat( projectProfiles, settingsProfiles ).collect( 
toSet() );
+    }
+
+    /**
+     * Check whether the required profiles were found in any of the projects 
we're building or the Maven settings.

Review comment:
       drop "Maven" because the method above doesn't use it either.

##########
File path: 
maven-core/src/main/java/org/apache/maven/execution/ProfileActivation.java
##########
@@ -0,0 +1,180 @@
+package org.apache.maven.execution;
+
+/*
+ * 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.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Predicate;
+
+import static java.util.stream.Collectors.toSet;
+
+/**
+ * Container for storing the request from the user to activate or de-activate 
certain profiles and optionally fail the
+ * build if those profiles do not exist.
+ */
+public class ProfileActivation

Review comment:
       Agreed.

##########
File path: maven-core/src/main/java/org/apache/maven/DefaultMaven.java
##########
@@ -493,22 +505,88 @@ private void 
validatePrerequisitesForNonMavenPluginProjects( List<MavenProject>
         }
     }
 
-    private void validateActivatedProfiles( List<MavenProject> projects, 
List<String> activeProfileIds )
+    /**
+     * Get all profiles that are detected in either the projects, any parent 
of the projects or the settings.
+     * @param session The Maven session
+     * @return A {@link Set} of profile identifiers, never {@code null}.
+     */
+    private Set<String> getAllProfiles( MavenSession session )
     {
-        Collection<String> notActivatedProfileIds = new LinkedHashSet<>( 
activeProfileIds );
-
-        for ( MavenProject project : projects )
+        final Set<MavenProject> projectsIncludingParents = new HashSet<>();
+        for ( MavenProject project : session.getProjects() )
         {
-            for ( List<String> profileIds : 
project.getInjectedProfileIds().values() )
+            boolean isAdded = projectsIncludingParents.add( project );
+            MavenProject parent = project.getParent();
+            while ( isAdded && parent != null )
             {
-                notActivatedProfileIds.removeAll( profileIds );
+                isAdded = projectsIncludingParents.add( parent );
+                parent = parent.getParent();
             }
         }
 
-        for ( String notActivatedProfileId : notActivatedProfileIds )
+        final Stream<String> projectProfiles = 
projectsIncludingParents.stream()
+                .map( MavenProject::getModel )
+                .map( Model::getProfiles )
+                .flatMap( Collection::stream )
+                .map( Profile::getId );
+        final Stream<String> settingsProfiles = 
session.getSettings().getProfiles().stream()
+                .map( org.apache.maven.settings.Profile::getId );
+
+        return Stream.concat( projectProfiles, settingsProfiles ).collect( 
toSet() );
+    }
+
+    /**
+     * Check whether the required profiles were found in any of the projects 
we're building or the Maven settings.
+     * @param session the Maven session.
+     * @param profileActivation the requested optional and required profiles.
+     */
+    private void validateRequiredProfiles( MavenSession session, 
ProfileActivation profileActivation )
+    {
+        final Set<String> allAvailableProfiles = getAllProfiles( session );
+
+        final Set<String> requiredProfiles = new HashSet<>( );
+        requiredProfiles.addAll( 
profileActivation.getRequiredActiveProfileIds() );
+        requiredProfiles.addAll( 
profileActivation.getRequiredInactiveProfileIds() );
+
+        // Check whether the required profiles were found in any of the 
projects we're building.
+        final Set<String> notFoundRequiredProfiles = requiredProfiles.stream()
+                .filter( rap -> !allAvailableProfiles.contains( rap ) )
+                .collect( toSet() );
+
+        if ( !notFoundRequiredProfiles.isEmpty() )
+        {
+            final String message = String.format(
+                    "The requested profiles [%s] could not be activated or 
de-activated because they do not exist.",

Review comment:
       Please use [deactivate](https://www.lexico.com/en/definition/deactivate).




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