Exclude by jar type when running and packaging with Maven

This commit updates the Maven Plugin to filter dependencies based on
the Spring-Boot-Jar-Type entry in their manifest. Jars with a
Spring-Boot-Jar-Type of dependencies-starter or annotation-processor
are excluded.

See gh-22036

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/AbstractDependencyFilterMojo.java

@@ -104,6 +104,7 @@ public abstract class AbstractDependencyFilterMojo extends AbstractMojo {
 		if (this.excludes != null && !this.excludes.isEmpty()) {
 			filters.addFilter(new ExcludeFilter(this.excludes));
 		}
+		filters.addFilter(new JarTypeFilter());
 		return filters;
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/JarTypeFilter.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2012-2020 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.boot.maven;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.jar.JarFile;
+
+import org.apache.maven.artifact.Artifact;
+
+/**
+ * A {@link DependencyFilter} that filters dependencies based on the jar type declared in
+ * their manifest.
+ *
+ * @author Andy Wilkinson
+ */
+class JarTypeFilter extends DependencyFilter {
+
+	private static final Set<String> EXCLUDED_JAR_TYPES = Collections
+			.unmodifiableSet(new HashSet<>(Arrays.asList("annotation-processor", "dependencies-starter")));
+
+	JarTypeFilter() {
+		super(Collections.emptyList());
+	}
+
+	@Override
+	protected boolean filter(Artifact artifact) {
+		try (JarFile jarFile = new JarFile(artifact.getFile())) {
+			String jarType = jarFile.getManifest().getMainAttributes().getValue("Spring-Boot-Jar-Type");
+			return jarType != null && EXCLUDED_JAR_TYPES.contains(jarType);
+		}
+		catch (IOException ex) {
+			return false;
+		}
+	}
+
+}