Hacking

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/DockerApi.java

@@ -22,7 +22,6 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.io.OutputStream;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.nio.charset.StandardCharsets;
@@ -293,6 +292,7 @@ public void exportLayerFiles(ImageReference reference, IOBiConsumer<String, Path
 			URI saveUri = buildUrl("/images/" + reference + "/get");
 			Response response = http().get(saveUri);
 			Path exportFile = copyToTemp(response.getContent());
+
 			ImageArchiveManifest manifest = getManifest(reference, exportFile);
 			try (TarArchiveInputStream tar = new TarArchiveInputStream(new FileInputStream(exportFile.toFile()))) {
 				TarArchiveEntry entry = tar.getNextTarEntry();
@@ -366,9 +366,7 @@ private ImageArchiveManifest readManifest(TarArchiveInputStream tar) throws IOEx
 
 		private Path copyToTemp(InputStream in) throws IOException {
 			Path path = Files.createTempFile("create-builder-scratch-", null);
-			try (OutputStream out = Files.newOutputStream(path)) {
-				StreamUtils.copy(in, out);
-			}
+			Files.copy(in, path);
 			return path;
 		}
 

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/DistributionManifestList.java

@@ -0,0 +1,125 @@
+/*
+ * Copyright 2012-2024 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.buildpack.platform.docker.type;
+
+import java.lang.invoke.MethodHandles;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.function.Function;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+import org.springframework.boot.buildpack.platform.json.MappedObject;
+
+/**
+ * A distribution manifest list as defined in
+ * {@code application/vnd.docker.distribution.manifest.list} files.
+ *
+ * @author Phillip Webb
+ * @since 3.1.12
+ * @see <a href="https://github.com/opencontainers/image-spec/blob/main/manifest.md">OCI
+ * Image Manifest Specification</a>
+ */
+public class DistributionManifestList extends MappedObject {
+
+	private final Integer schemaVersion;
+
+	private final String mediaType;
+
+	private final List<Manifest> manifests;
+
+	private final List<Layer> layers;
+
+	protected DistributionManifestList(JsonNode node) {
+		super(node, MethodHandles.lookup());
+		this.schemaVersion = valueAt("/schemaVersion", Integer.class);
+		this.mediaType = valueAt("/mediaType", String.class);
+		this.manifests = loadChildren(getNode().at("/manifests"), Manifest::new);
+		this.layers = loadChildren(getNode().at("/layers"), Layer::new);
+	}
+
+	private static <T> List<T> loadChildren(JsonNode node, Function<JsonNode, T> factory) {
+		if (node.isEmpty()) {
+			return Collections.emptyList();
+		}
+		List<T> children = new ArrayList<>();
+		node.elements().forEachRemaining((childNode) -> children.add(factory.apply(childNode)));
+		return Collections.unmodifiableList(children);
+	}
+
+	public Integer getSchemaVersion() {
+		return this.schemaVersion;
+	}
+
+	public String getMediaType() {
+		return this.mediaType;
+	}
+
+	public List<Manifest> getManifests() {
+		return this.manifests;
+	}
+
+	public List<Layer> getLayers() {
+		return this.layers;
+	}
+
+	public static class Manifest extends MappedObject {
+
+		private final String mediaType;
+
+		private final String digest;
+
+		protected Manifest(JsonNode node) {
+			super(node, MethodHandles.lookup());
+			this.mediaType = valueAt("/mediaType", String.class);
+			this.digest = valueAt("/digest", String.class);
+		}
+
+		public String getMediaType() {
+			return this.mediaType;
+		}
+
+		public String getDigest() {
+			return this.digest;
+		}
+
+	}
+
+	public static class Layer extends MappedObject {
+
+		private final String mediaType;
+
+		private final String digest;
+
+		protected Layer(JsonNode node) {
+			super(node, MethodHandles.lookup());
+			this.mediaType = valueAt("/mediaType", String.class);
+			this.digest = valueAt("/digest", String.class);
+		}
+
+		public String getMediaType() {
+			return this.mediaType;
+		}
+
+		public String getDigest() {
+			return this.digest;
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/ImageArchiveIndex.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright 2012-2024 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.buildpack.platform.docker.type;
+
+import java.lang.invoke.MethodHandles;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+import org.springframework.boot.buildpack.platform.json.MappedObject;
+
+/**
+ * Image archive index information as provided by {@code index.json}.
+ *
+ * @author Phillip Webb
+ * @since 3.1.12
+ * @see <a href=
+ * "https://github.com/opencontainers/image-spec/blob/main/image-index.md">OCI Image Index
+ * Specification</a>
+ */
+public class ImageArchiveIndex extends MappedObject {
+
+	private final Integer schemaVersion;
+
+	private final List<Manifest> manifests;
+
+	protected ImageArchiveIndex(JsonNode node) {
+		super(node, MethodHandles.lookup());
+		this.schemaVersion = valueAt("/schemaVersion", Integer.class);
+		this.manifests = loadManifests(getNode().at("/manifests"));
+	}
+
+	private static List<Manifest> loadManifests(JsonNode node) {
+		if (node.isEmpty()) {
+			return Collections.emptyList();
+		}
+		List<Manifest> manifests = new ArrayList<>();
+		node.elements().forEachRemaining((manifestNode) -> manifests.add(new Manifest(manifestNode)));
+		return Collections.unmodifiableList(manifests);
+	}
+
+	public Integer getSchemaVersion() {
+		return this.schemaVersion;
+	}
+
+	public List<Manifest> getManifests() {
+		return this.manifests;
+	}
+
+	public static class Manifest extends MappedObject {
+
+		private final String mediaType;
+
+		private final String digest;
+
+		protected Manifest(JsonNode node) {
+			super(node, MethodHandles.lookup());
+			this.mediaType = valueAt("/mediaType", String.class);
+			this.digest = valueAt("/digest", String.class);
+		}
+
+		public String getMediaType() {
+			return this.mediaType;
+		}
+
+		public String getDigest() {
+			return this.digest;
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/ImageArchiveManifest.java

@@ -28,7 +28,7 @@
 import org.springframework.boot.buildpack.platform.json.MappedObject;
 
 /**
- * Image archive manifest information.
+ * Image archive manifest information as provided by {@code manifest.json}.
  *
  * @author Scott Frederick
  * @since 2.7.10
@@ -39,7 +39,11 @@ public class ImageArchiveManifest extends MappedObject {
 
 	protected ImageArchiveManifest(JsonNode node) {
 		super(node, MethodHandles.lookup());
-		getNode().elements().forEachRemaining((element) -> this.entries.add(ManifestEntry.of(element)));
+		getNode().elements().forEachRemaining(this::addEntry);
+	}
+
+	private boolean addEntry(JsonNode node) {
+		return this.entries.add(ManifestEntry.of(node));
 	}
 
 	/**

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/docker/Gh40100.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2012-2024 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.buildpack.platform.docker;
+
+import java.io.IOException;
+import java.nio.file.Files;
+
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.buildpack.platform.docker.type.ImageReference;
+
+/**
+ * @author Phillip Webb
+ */
+class Gh40100 {
+
+	@Test
+	void testName() throws IOException {
+		DockerApi api = new DockerApi();
+		ImageReference reference = ImageReference.of("gcr.io/paketo-buildpacks/adoptium:latest");
+		api.image().pull(reference, UpdateListener.none());
+		api.image().exportLayerFiles(reference, (name, path) -> {
+			System.out.println(name);
+			System.out.println(path);
+			TarArchiveInputStream tarIn = new TarArchiveInputStream(Files.newInputStream(path));
+			tarIn.getNextEntry();
+		});
+	}
+
+}

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/docker/type/DistributionManifestListTests.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2012-2024 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.buildpack.platform.docker.type;
+
+import java.io.IOException;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.buildpack.platform.json.AbstractJsonTests;
+
+/**
+ * Tests for {@link DistributionManifestList}.
+ *
+ * @author Phillip Webb
+ */
+class DistributionManifestListTests extends AbstractJsonTests {
+
+	@Test
+	void loadJsonWhenHasManifests() throws IOException {
+		String content = getContentAsString("distribution-manifest-list-with-manifests.json");
+		DistributionManifestList manifestList = getManifestList(content);
+	}
+
+	@Test
+	void loadJsonWhenHasLayers() throws IOException {
+		String content = getContentAsString("distribution-manifest-list-with-layers.json");
+		DistributionManifestList manifestList = getManifestList(content);
+	}
+
+	private DistributionManifestList getManifestList(String content) throws IOException {
+		return new DistributionManifestList(getObjectMapper().readTree(content));
+	}
+
+}