Add support for Maven's finalName

See gh-1052

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

@@ -51,6 +51,8 @@ public class MavenBuildSettings extends BuildSettings {
 
 	private final String testSourceDirectory;
 
+	private final String finalName;
+
 	protected MavenBuildSettings(Builder builder) {
 		super(builder);
 		this.parent = builder.parent;
@@ -62,6 +64,7 @@ public class MavenBuildSettings extends BuildSettings {
 		this.scm = builder.scm.build();
 		this.sourceDirectory = builder.sourceDirectory;
 		this.testSourceDirectory = builder.testSourceDirectory;
+		this.finalName = builder.finalName;
 	}
 
 	/**
@@ -140,6 +143,14 @@ public class MavenBuildSettings extends BuildSettings {
 		return this.testSourceDirectory;
 	}
 
+	/**
+	 * Return the final name of the compiled artifact.
+	 * @return the final name
+	 */
+	public String getFinalName() {
+		return this.finalName;
+	}
+
 	/**
 	 * Builder for a Maven dependency.
 	 *
@@ -165,6 +176,8 @@ public class MavenBuildSettings extends BuildSettings {
 
 		private String testSourceDirectory;
 
+		private String finalName;
+
 		public Builder() {
 		}
 
@@ -275,6 +288,16 @@ public class MavenBuildSettings extends BuildSettings {
 			return self();
 		}
 
+		/**
+		 * Set the finalName of the artifact as a child tag in the <build> tag.
+		 * @param finalName the final name of the artifact after compiling
+		 * @return this for method chaining
+		 */
+		public Builder finalName(String finalName) {
+			this.finalName = finalName;
+			return self();
+		}
+
 		@Override
 		public MavenBuildSettings build() {
 			return new MavenBuildSettings(this);

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

@@ -305,11 +305,13 @@ public class MavenBuildWriter {
 	private void writeBuild(IndentingWriter writer, MavenBuild build) {
 		MavenBuildSettings settings = build.getSettings();
 		if (settings.getSourceDirectory() == null && settings.getTestSourceDirectory() == null
-				&& build.resources().isEmpty() && build.testResources().isEmpty() && build.plugins().isEmpty()) {
+				&& settings.getFinalName() == null && build.resources().isEmpty() && build.testResources().isEmpty()
+				&& build.plugins().isEmpty()) {
 			return;
 		}
 		writer.println();
 		writeElement(writer, "build", () -> {
+			writeSingleElement(writer, "finalName", settings.getFinalName());
 			writeSingleElement(writer, "sourceDirectory", settings.getSourceDirectory());
 			writeSingleElement(writer, "testSourceDirectory", settings.getTestSourceDirectory());
 			writeResources(writer, build);

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

@@ -685,6 +685,14 @@ class MavenBuildWriterTests {
 		});
 	}
 
+	@Test
+	void pomWithFinalName() {
+		MavenBuild build = new MavenBuild();
+		build.settings().coordinates("com.example.demo", "demo").finalName("theArtifact.jar");
+		generatePom(build,
+				(pom) -> assertThat(pom).textAtPath("/project/build/finalName").isEqualTo("theArtifact.jar"));
+	}
+
 	@Test
 	void pomWithCustomVersion() {
 		MavenBuild build = new MavenBuild();