Add plugin management generation for Maven

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenBuild.java

@@ -27,6 +27,7 @@
  * @author Andy Wilkinson
  * @author Stephane Nicoll
  * @author Niklas Herder
+ * @author Maurice Zeijen
  */
 public class MavenBuild extends Build {
 
@@ -36,6 +37,8 @@ public class MavenBuild extends Build {
 
 	private final MavenResourceContainer testResources = new MavenResourceContainer();
 
+	private final MavenPluginContainer pluginManagementPlugins = new MavenPluginContainer();
+
 	private final MavenPluginContainer plugins = new MavenPluginContainer();
 
 	private final MavenExtensionContainer extensions = new MavenExtensionContainer();
@@ -99,6 +102,15 @@ public MavenResourceContainer testResources() {
 		return this.testResources;
 	}
 
+	/**
+	 * Return the {@linkplain MavenPluginContainer plugin container} to use to configure
+	 * plugin management plugins.
+	 * @return the {@link MavenPluginContainer}
+	 */
+	public MavenPluginContainer pluginManagementPlugins() {
+		return this.pluginManagementPlugins;
+	}
+
 	/**
 	 * Return the {@linkplain MavenPluginContainer plugin container} to use to configure
 	 * plugins.

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildWriter.java

@@ -61,6 +61,7 @@
  * @author Jafer Khan Shamshad
  * @author Joachim Pasquali
  * @author Niklas Herder
+ * @author Maurice Zeijen
  */
 public class MavenBuildWriter {
 
@@ -358,7 +359,8 @@ private void writeBuild(IndentingWriter writer, MavenBuild build) {
 		MavenBuildSettings settings = build.getSettings();
 		if (settings.getDefaultGoal() == null && settings.getFinalName() == null
 				&& settings.getSourceDirectory() == null && settings.getTestSourceDirectory() == null
-				&& build.resources().isEmpty() && build.testResources().isEmpty() && build.plugins().isEmpty()
+				&& build.resources().isEmpty() && build.testResources().isEmpty()
+				&& build.pluginManagementPlugins().isEmpty() && build.plugins().isEmpty()
 				&& build.extensions().isEmpty()) {
 			return;
 		}
@@ -369,6 +371,7 @@ private void writeBuild(IndentingWriter writer, MavenBuild build) {
 			writeSingleElement(writer, "sourceDirectory", settings.getSourceDirectory());
 			writeSingleElement(writer, "testSourceDirectory", settings.getTestSourceDirectory());
 			writeResources(writer, build.resources(), build.testResources());
+			writePluginManagement(writer, build.pluginManagementPlugins());
 			writeCollectionElement(writer, "plugins", build.plugins().values(), this::writePlugin);
 			writeCollectionElement(writer, "extensions", build.extensions().values(), this::writeExtension);
 		});
@@ -408,6 +411,13 @@ private void writeResourceExclude(IndentingWriter writer, String exclude) {
 		writeSingleElement(writer, "exclude", exclude);
 	}
 
+	private void writePluginManagement(IndentingWriter writer, MavenPluginContainer pluginManagementContainer) {
+		if (!pluginManagementContainer.isEmpty()) {
+			writeElement(writer, "pluginManagement", () -> writeCollectionElement(writer, "plugins",
+					pluginManagementContainer.values(), this::writePlugin));
+		}
+	}
+
 	private void writePlugin(IndentingWriter writer, MavenPlugin plugin) {
 		writeElement(writer, "plugin", () -> {
 			writeSingleElement(writer, "groupId", plugin.getGroupId());
@@ -596,13 +606,15 @@ private void writeProfileActivation(IndentingWriter writer, MavenProfileActivati
 	private void writeProfileBuild(IndentingWriter writer, MavenProfile profile) {
 		MavenProfile.Settings settings = profile.getSettings();
 		if (settings.getDefaultGoal() == null && settings.getFinalName() == null && profile.resources().isEmpty()
-				&& profile.testResources().isEmpty() && profile.plugins().isEmpty()) {
+				&& profile.testResources().isEmpty() && profile.pluginManagementPlugins().isEmpty()
+				&& profile.plugins().isEmpty()) {
 			return;
 		}
 		writeElement(writer, "build", () -> {
 			writeSingleElement(writer, "defaultGoal", settings.getDefaultGoal());
 			writeSingleElement(writer, "finalName", settings.getFinalName());
 			writeResources(writer, profile.resources(), profile.testResources());
+			writePluginManagement(writer, profile.pluginManagementPlugins());
 			writeCollectionElement(writer, "plugins", profile.plugins().values(), this::writePlugin);
 		});
 	}

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenProfile.java

@@ -27,6 +27,7 @@
  *
  * @author Daniel Andres Pelaez Lopez
  * @author Stephane Nicoll
+ * @author Maurice Zeijen
  */
 public class MavenProfile {
 
@@ -44,6 +45,8 @@ public class MavenProfile {
 
 	private final MavenResourceContainer testResources = new MavenResourceContainer();
 
+	private final MavenPluginContainer pluginManagementPlugins = new MavenPluginContainer();
+
 	private final MavenPluginContainer plugins = new MavenPluginContainer();
 
 	private final BomContainer boms;
@@ -184,6 +187,15 @@ public MavenResourceContainer testResources() {
 		return this.testResources;
 	}
 
+	/**
+	 * Return the {@linkplain MavenPluginContainer plugin container} to use to configure
+	 * plugin management plugins.
+	 * @return the {@link MavenPluginContainer}
+	 */
+	public MavenPluginContainer pluginManagementPlugins() {
+		return this.pluginManagementPlugins;
+	}
+
 	/**
 	 * Return the {@linkplain MavenPluginContainer plugin container} to use to configure
 	 * plugins.

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildTests.java

@@ -25,6 +25,7 @@
  *
  * @author Stephane Nicoll
  * @author Olga Maciaszek-Sharma
+ * @author Maurice Zeijen
  */
 class MavenBuildTests {
 
@@ -57,6 +58,17 @@ void mavenTestResourcesCanBeConfigured() {
 		});
 	}
 
+	@Test
+	void mavenPluginManagementCanBeConfigured() {
+		MavenBuild build = new MavenBuild();
+		build.pluginManagementPlugins().add("com.example", "test-plugin", (plugin) -> plugin.version("1.2.3"));
+		assertThat(build.pluginManagementPlugins().values()).singleElement().satisfies((testPlugin) -> {
+			assertThat(testPlugin.getGroupId()).isEqualTo("com.example");
+			assertThat(testPlugin.getArtifactId()).isEqualTo("test-plugin");
+			assertThat(testPlugin.getVersion()).isEqualTo("1.2.3");
+		});
+	}
+
 	@Test
 	void mavenPluginCanBeConfigured() {
 		MavenBuild build = new MavenBuild();
@@ -184,4 +196,20 @@ void mavenProfileCanBeRemoved() {
 		assertThat(build.profiles().values()).isEmpty();
 	}
 
+	@Test
+	void mavenPluginManagementInProfileCanBeConfigured() {
+		MavenBuild build = new MavenBuild();
+		build.profiles()
+			.id("test")
+			.pluginManagementPlugins()
+			.add("com.example", "test-plugin", (plugin) -> plugin.version("1.2.3"));
+		assertThat(build.profiles().values()).singleElement()
+			.satisfies((profile) -> assertThat(profile.pluginManagementPlugins().values()).singleElement()
+				.satisfies((testPlugin) -> {
+					assertThat(testPlugin.getGroupId()).isEqualTo("com.example");
+					assertThat(testPlugin.getArtifactId()).isEqualTo("test-plugin");
+					assertThat(testPlugin.getVersion()).isEqualTo("1.2.3");
+				}));
+	}
+
 }

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildWriterTests.java

@@ -40,6 +40,7 @@
  * @author Olga Maciaszek-Sharma
  * @author Jafer Khan Shamshad
  * @author Joachim Pasquali
+ * @author Maurice Zeijen
  */
 class MavenBuildWriterTests {
 
@@ -604,6 +605,20 @@ void pomWithTestResources() {
 		});
 	}
 
+	@Test
+	void pomWithPluginManagement() {
+		MavenBuild build = new MavenBuild();
+		build.settings().coordinates("com.example.demo", "demo");
+		build.pluginManagementPlugins()
+			.add("org.springframework.boot", "spring-boot-maven-plugin", (plugin) -> plugin.version("1.2.3"));
+		generatePom(build, (pom) -> {
+			NodeAssert plugin = pom.nodeAtPath("/project/build/pluginManagement/plugins/plugin");
+			assertThat(plugin).textAtPath("groupId").isEqualTo("org.springframework.boot");
+			assertThat(plugin).textAtPath("artifactId").isEqualTo("spring-boot-maven-plugin");
+			assertThat(plugin).textAtPath("version").isEqualTo("1.2.3");
+		});
+	}
+
 	@Test
 	void pomWithPlugin() {
 		MavenBuild build = new MavenBuild();
@@ -1170,6 +1185,23 @@ void pomWithProfileTestResources() {
 		});
 	}
 
+	@Test
+	void pomWithProfilePluginManagement() {
+		MavenBuild build = new MavenBuild();
+		build.profiles()
+			.id("profile1")
+			.pluginManagementPlugins()
+			.add("org.springframework.boot", "spring-boot-maven-plugin", (plugin) -> plugin.version("1.2.3"));
+		generatePom(build, (pom) -> {
+			NodeAssert profile = pom.nodeAtPath("/project/profiles/profile");
+			assertThat(profile).textAtPath("id").isEqualTo("profile1");
+			NodeAssert plugin = profile.nodeAtPath("build/pluginManagement/plugins/plugin");
+			assertThat(plugin).textAtPath("groupId").isEqualTo("org.springframework.boot");
+			assertThat(plugin).textAtPath("artifactId").isEqualTo("spring-boot-maven-plugin");
+			assertThat(plugin).textAtPath("version").isEqualTo("1.2.3");
+		});
+	}
+
 	@Test
 	void pomWithProfilePlugin() {
 		MavenBuild build = new MavenBuild();