Write native-image argfile only if there are excludes

Refactors duplicate logic in BootZipCopyAction and Packager into
separate classes.

Closes gh-33363

Co-authored-by: Phillip Webb <pwebb@vmware.com>

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/NativeImageArgFileTests.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2012-2022 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.loader.tools;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
+
+/**
+ * Tests for @{link NativeImageArgFile}.
+ *
+ * @author Moritz Halbritter
+ */
+class NativeImageArgFileTests {
+
+	@Test
+	void writeIfNecessaryWhenHasExcludesWritesLines() {
+		NativeImageArgFile argFile = new NativeImageArgFile(List.of("path/to/dependency-1.jar", "dependency-2.jar"));
+		List<String> lines = new ArrayList<>();
+		argFile.writeIfNecessary(lines::addAll);
+		assertThat(lines).containsExactly("--exclude-config", "\\Qdependency-1.jar\\E", "^/META-INF/native-image/.*",
+				"--exclude-config", "\\Qdependency-2.jar\\E", "^/META-INF/native-image/.*");
+	}
+
+	@Test
+	void writeIfNecessaryWhenHasNothingDoesNotCallConsumer() {
+		NativeImageArgFile argFile = new NativeImageArgFile(Collections.emptyList());
+		argFile.writeIfNecessary((lines) -> fail("Should not be called"));
+	}
+
+}

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/ReachabilityMetadataPropertiesTests.java

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+/*
+ * Copyright 2012-2022 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.loader.tools;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ReachabilityMetadataProperties}.
+ *
+ * @author Moritz Halbritter
+ */
+class ReachabilityMetadataPropertiesTests {
+
+	@Test
+	void shouldReadFromInputStream() throws IOException {
+		String propertiesContent = "override=true\n";
+		ReachabilityMetadataProperties properties = ReachabilityMetadataProperties
+				.fromInputStream(new ByteArrayInputStream(propertiesContent.getBytes(StandardCharsets.UTF_8)));
+		assertThat(properties.isOverridden()).isTrue();
+	}
+
+	@Test
+	void shouldFormatLocation() {
+		String location = ReachabilityMetadataProperties
+				.getLocation(LibraryCoordinates.of("group-id", "artifact-id", "1.0.0"));
+		assertThat(location)
+				.isEqualTo("META-INF/native-image/group-id/artifact-id/1.0.0/reachability-metadata.properties");
+	}
+
+}