Update versions if the project references another pom as module

tycho-its/projects/tycho-version-plugin/set-version/nested_modules/bundle/META-INF/MANIFEST.MF

@@ -0,0 +1,5 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Test Bundle
+Bundle-SymbolicName: bundle
+Bundle-Version: 1.0.0.qualifier

tycho-its/projects/tycho-version-plugin/set-version/nested_modules/bundle/pom.xml

@@ -0,0 +1,14 @@
+<?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/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.tycho.its</groupId>
+		<artifactId>parent</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+		<relativePath>../parent</relativePath>
+	</parent>
+	<artifactId>bundle</artifactId>
+</project>

tycho-its/projects/tycho-version-plugin/set-version/nested_modules/parent/pom.xml

@@ -0,0 +1,17 @@
+<?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/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>org.tycho.its</groupId>
+	<artifactId>parent</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<packaging>pom</packaging>
+
+	<properties>
+		<tycho-version>4.0.0-SNAPSHOT</tycho-version>
+	</properties>
+	<modules>
+		<module>../bundle</module>
+	</modules>
+
+</project>

tycho-its/projects/tycho-version-plugin/set-version/nested_modules/pom.xml

@@ -0,0 +1,28 @@
+<?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/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>org.tycho.its</groupId>
+	<artifactId>root</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<packaging>pom</packaging>
+
+	<properties>
+		<tycho-version>4.0.0-SNAPSHOT</tycho-version>
+	</properties>
+	<modules>
+		<module>parent</module>
+	</modules>
+
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.eclipse.tycho</groupId>
+				<artifactId>tycho-maven-plugin</artifactId>
+				<version>${tycho-version}</version>
+				<extensions>true</extensions>
+			</plugin>
+		</plugins>
+	</build>
+</project>

tycho-its/src/test/java/org/eclipse/tycho/test/versionsplugin/TychoVersionsPluginTest.java

@@ -17,17 +17,22 @@
 import static org.junit.Assert.assertTrue;
 
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileReader;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.List;
 import java.util.Properties;
+import java.util.jar.JarFile;
+import java.util.jar.Manifest;
 
 import org.apache.maven.it.Verifier;
 import org.apache.maven.model.Model;
 import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
 import org.eclipse.tycho.test.AbstractTychoIntegrationTest;
 import org.eclipse.tycho.version.TychoVersion;
 import org.junit.Test;
+import org.osgi.framework.Constants;
 
 public class TychoVersionsPluginTest extends AbstractTychoIntegrationTest {
 
@@ -99,6 +104,28 @@ public void updateProjectVersionBndTest() throws Exception {
 		assertEquals("Bundle-Version is not as expected!", expectedNewVersion, versionProperty);
 	}
 
+	@Test
+	public void updateProjectVersionWithNestedPom() throws Exception {
+		String expectedNewVersion = "1.1.0";
+
+		Verifier verifier = getVerifier("tycho-version-plugin/nested_modules", true);
+
+		verifier.addCliOption("-DnewVersion=" + expectedNewVersion);
+		verifier.executeGoal("org.eclipse.tycho:tycho-versions-plugin:" + VERSION + ":set-version");
+
+		verifier.verifyErrorFreeLog();
+		List<String> poms = List.of("pom.xml", "parent/pom.xml", "bundle/pom.xml");
+		for (String pom : poms) {
+			MavenXpp3Reader pomReader = new MavenXpp3Reader();
+			Model pomModel = pomReader.read(new FileReader(new File(verifier.getBasedir(), pom)));
+			assertEquals("<version> in " + pom + " has not been changed!", expectedNewVersion, pomModel.getVersion());
+		}
+		Manifest manifest = new Manifest(
+				new FileInputStream(new File(verifier.getBasedir(), "bundle/" + JarFile.MANIFEST_NAME)));
+		assertEquals("version in manifest was not updated!", expectedNewVersion,
+				manifest.getMainAttributes().getValue(Constants.BUNDLE_VERSION));
+	}
+
 	@Test
 	public void updateProjectMetadataVersionBndTest() throws Exception {
 		String expectedNewVersion = "2.0.0.qualifier";