[MNG-7344] Integration test for effective pom with imports

core-it-suite/src/test/java/org/apache/maven/it/MavenITmng7344EffectivePomPluginTest.java

@@ -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.
+ */
+package org.apache.maven.it;
+
+import java.io.File;
+
+import org.apache.maven.shared.verifier.Verifier;
+import org.apache.maven.shared.verifier.util.ResourceExtractor;
+import org.junit.jupiter.api.Test;
+
+public class MavenITmng7344EffectivePomPluginTest extends AbstractMavenIntegrationTestCase {
+    public MavenITmng7344EffectivePomPluginTest() {
+        super("[4.0.0-alpha-13,)");
+    }
+
+    @Test
+    public void testIt() throws Exception {
+        File testDir = ResourceExtractor.simpleExtractResources(getClass(), "/mng-7344-effective-pom");
+
+        Verifier verifier = newVerifier(new File(testDir, "plugin").getAbsolutePath(), "remote");
+        verifier.addCliArgument("install");
+        verifier.execute();
+        verifier.verifyErrorFreeLog();
+
+        for (String childFolder : new String[] {"dep-x", "bom-parent", "bom-intermediate"}) {
+            verifier = newVerifier(new File(testDir, childFolder).getAbsolutePath());
+            verifier.addCliArgument("install");
+            verifier.execute();
+            verifier.verifyErrorFreeLog();
+        }
+
+        verifier = newVerifier(new File(testDir, "consumer").getAbsolutePath());
+        verifier.setForkJvm(true);
+        verifier.addCliArgument("compile");
+        verifier.execute();
+
+        verifier.verifyTextInLog("[IMPORTED FROM] bom-intermediate-1.0-SNAPSHOT.pom");
+    }
+}

core-it-suite/src/test/java/org/apache/maven/it/TestSuiteOrdering.java

@@ -777,6 +777,7 @@ public TestSuiteOrdering() {
         suite.addTestSuite(MavenIT0010DependencyClosureResolutionTest.class);
         suite.addTestSuite(MavenIT0009GoalConfigurationTest.class);
         suite.addTestSuite(MavenIT0008SimplePluginTest.class);
+        suite.addTestSuite(MavenITmng7344EffectivePomPluginTest.class);
         /*
          * Add tests in reverse alpha order above.
          */

core-it-suite/src/test/resources/mng-7344-effective-pom/bom-intermediate/pom.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its.mng7344</groupId>
+  <artifactId>bom-intermediate</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.apache.maven.its.mng7344</groupId>
+        <artifactId>bom-parent</artifactId>
+        <version>1.0-SNAPSHOT</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+</project>

core-it-suite/src/test/resources/mng-7344-effective-pom/bom-parent/pom.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its.mng7344</groupId>
+  <artifactId>bom-parent</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.apache.maven.its.mng7344</groupId>
+        <artifactId>dep-x</artifactId>
+        <version>2</version>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+</project>

core-it-suite/src/test/resources/mng-7344-effective-pom/consumer/pom.xml

@@ -0,0 +1,65 @@
+<?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/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its.mng7344</groupId>
+  <artifactId>consumer</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.apache.maven.its.mng7344</groupId>
+        <artifactId>bom-intermediate</artifactId>
+        <version>1.0-SNAPSHOT</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven.its.mng7344</groupId>
+      <artifactId>dep-x</artifactId>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.its.mng7344</groupId>
+        <artifactId>mng-7344-maven-plugin</artifactId>
+        <version>1.0-SNAPSHOT</version>
+        <executions>
+          <execution>
+            <id>effective-pom</id>
+            <goals>
+              <goal>effective-pom</goal>
+            </goals>
+            <phase>compile</phase>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

core-it-suite/src/test/resources/mng-7344-effective-pom/dep-x/pom.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its.mng7344</groupId>
+  <artifactId>dep-x</artifactId>
+  <version>2</version>
+</project>

core-it-suite/src/test/resources/mng-7344-effective-pom/plugin/pom.xml

@@ -0,0 +1,76 @@
+<?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/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its.mng7344</groupId>
+  <artifactId>mng-7344-maven-plugin</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>maven-plugin</packaging>
+
+  <prerequisites>
+    <maven>${mavenVersion}</maven>
+  </prerequisites>
+
+  <properties>
+    <javaVersion>8</javaVersion>
+    <mavenVersion>3.6.3</mavenVersion>
+    <mavenPluginToolsVersion>3.9.0</mavenPluginToolsVersion>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-plugin-api</artifactId>
+      <version>${mavenVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-core</artifactId>
+      <version>${mavenVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-model</artifactId>
+      <version>${mavenVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.plugin-tools</groupId>
+      <artifactId>maven-plugin-annotations</artifactId>
+      <version>${mavenPluginToolsVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-plugin-plugin</artifactId>
+          <version>${mavenPluginToolsVersion}</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>

core-it-suite/src/test/resources/mng-7344-effective-pom/plugin/src/main/java/testmojo/EffectivePomMojo.java

@@ -0,0 +1,82 @@
+/*
+ * 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 testmojo;
+
+/*
+ * 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.lang.reflect.Field;
+import java.util.List;
+
+import org.apache.maven.model.Dependency;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.project.MavenProject;
+
+@Mojo(name = "effective-pom", aggregator = true)
+public class EffectivePomMojo extends AbstractMojo {
+
+    @Parameter(defaultValue = "${reactorProjects}", required = true, readonly = true)
+    private List<MavenProject> projects;
+
+    public void execute() throws MojoExecutionException, MojoFailureException {
+        projects.stream()
+                .map(MavenProject::getDependencyManagement)
+                .map(depMgt -> depMgt != null ? depMgt.getDependencies() : null)
+                .filter(dependencies -> dependencies != null)
+                .flatMap(List::stream)
+                .forEach(dependency -> {
+                    getLog().info("" + dependency);
+                    try {
+                        getLog().info("[IMPORTED FROM] " + getImportedFrom(dependency));
+                    } catch (Exception ex) {
+                        getLog().error("Failed to get importedFrom");
+                    }
+                });
+    }
+
+    private String getImportedFrom(Dependency dependency) throws Exception {
+        Field delegateField = Class.forName("org.apache.maven.model.BaseObject").getDeclaredField("delegate");
+        delegateField.setAccessible(true);
+        Object delegate = delegateField.get(dependency);
+        delegateField.setAccessible(false);
+        Object importedFrom = delegate.getClass().getMethod("getImportedFrom").invoke(delegate);
+
+        return ("" + importedFrom).replaceAll("^.*[\\\\/]", "");
+    }
+}