| /* |
| * Copyright (C) 2009, Constantine Plotnikov <constantine.plotnikov@gmail.com> |
| * Copyright (C) 2009, Google Inc. |
| * Copyright (C) 2009, JetBrains s.r.o. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.lib; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.text.MessageFormat; |
| |
| import org.eclipse.jgit.errors.ConfigInvalidException; |
| import org.eclipse.jgit.errors.IncorrectObjectTypeException; |
| import org.eclipse.jgit.errors.MissingObjectException; |
| import org.eclipse.jgit.internal.JGitText; |
| import org.eclipse.jgit.revwalk.RevCommit; |
| import org.eclipse.jgit.revwalk.RevTree; |
| import org.eclipse.jgit.revwalk.RevWalk; |
| import org.eclipse.jgit.treewalk.TreeWalk; |
| import org.eclipse.jgit.util.RawParseUtils; |
| |
| /** |
| * Configuration file based on the blobs stored in the repository. |
| * |
| * This implementation currently only provides reading support, and is primarily |
| * useful for supporting the {@code .gitmodules} file. |
| */ |
| public class BlobBasedConfig extends Config { |
| /** |
| * Parse a configuration from a byte array. |
| * |
| * @param base |
| * the base configuration file |
| * @param blob |
| * the byte array, should be UTF-8 encoded text. |
| * @throws org.eclipse.jgit.errors.ConfigInvalidException |
| * the byte array is not a valid configuration format. |
| */ |
| public BlobBasedConfig(Config base, byte[] blob) |
| throws ConfigInvalidException { |
| super(base); |
| final String decoded; |
| if (isUtf8(blob)) { |
| decoded = RawParseUtils.decode(UTF_8, blob, 3, blob.length); |
| } else { |
| decoded = RawParseUtils.decode(blob); |
| } |
| fromText(decoded); |
| } |
| |
| /** |
| * Load a configuration file from a blob. |
| * |
| * @param base |
| * the base configuration file |
| * @param db |
| * the repository |
| * @param objectId |
| * the object identifier |
| * @throws java.io.IOException |
| * the blob cannot be read from the repository. |
| * @throws org.eclipse.jgit.errors.ConfigInvalidException |
| * the blob is not a valid configuration format. |
| */ |
| public BlobBasedConfig(Config base, Repository db, AnyObjectId objectId) |
| throws IOException, ConfigInvalidException { |
| this(base, read(db, objectId)); |
| } |
| |
| private static byte[] read(Repository db, AnyObjectId blobId) |
| throws MissingObjectException, IncorrectObjectTypeException, |
| IOException { |
| try (ObjectReader or = db.newObjectReader()) { |
| return read(or, blobId); |
| } |
| } |
| |
| private static byte[] read(ObjectReader or, AnyObjectId blobId) |
| throws MissingObjectException, IncorrectObjectTypeException, |
| IOException { |
| ObjectLoader loader = or.open(blobId, Constants.OBJ_BLOB); |
| return loader.getCachedBytes(Integer.MAX_VALUE); |
| } |
| |
| /** |
| * Load a configuration file from a blob stored in a specific commit. |
| * |
| * @param base |
| * the base configuration file |
| * @param db |
| * the repository containing the objects. |
| * @param treeish |
| * the tree (or commit) that contains the object |
| * @param path |
| * the path within the tree |
| * @throws java.io.FileNotFoundException |
| * the path does not exist in the commit's tree. |
| * @throws java.io.IOException |
| * the tree and/or blob cannot be accessed. |
| * @throws org.eclipse.jgit.errors.ConfigInvalidException |
| * the blob is not a valid configuration format. |
| */ |
| public BlobBasedConfig(Config base, Repository db, AnyObjectId treeish, |
| String path) throws FileNotFoundException, IOException, |
| ConfigInvalidException { |
| this(base, read(db, treeish, path)); |
| } |
| |
| private static byte[] read(Repository db, AnyObjectId treeish, String path) |
| throws MissingObjectException, IncorrectObjectTypeException, |
| IOException { |
| try (ObjectReader or = db.newObjectReader()) { |
| TreeWalk tree = TreeWalk.forPath(or, path, asTree(or, treeish)); |
| if (tree == null) |
| throw new FileNotFoundException(MessageFormat.format(JGitText |
| .get().entryNotFoundByPath, path)); |
| return read(or, tree.getObjectId(0)); |
| } |
| } |
| |
| private static AnyObjectId asTree(ObjectReader or, AnyObjectId treeish) |
| throws MissingObjectException, IncorrectObjectTypeException, |
| IOException { |
| if (treeish instanceof RevTree) |
| return treeish; |
| |
| if (treeish instanceof RevCommit |
| && ((RevCommit) treeish).getTree() != null) |
| return ((RevCommit) treeish).getTree(); |
| |
| try (RevWalk rw = new RevWalk(or)) { |
| return rw.parseTree(treeish).getId(); |
| } |
| } |
| } |