| // Copyright (C) 2009 The Android Open Source Project |
| // |
| // 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 |
| // |
| // http://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 com.google.gerrit.server.patch; |
| |
| import com.google.gerrit.client.reviewdb.Project; |
| import com.google.gerrit.git.InvalidRepositoryException; |
| import com.google.gerrit.server.GerritServer; |
| |
| import net.sf.ehcache.constructs.blocking.CacheEntryFactory; |
| |
| import org.spearce.jgit.lib.Repository; |
| import org.spearce.jgit.patch.FileHeader; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class DiffCacheEntryFactory implements CacheEntryFactory { |
| private final GerritServer server; |
| |
| public DiffCacheEntryFactory(final GerritServer gs) { |
| server = gs; |
| } |
| |
| public Object createEntry(Object genericKey) throws Exception { |
| final DiffCacheKey key = (DiffCacheKey) genericKey; |
| final Repository db = open(key.getProjectKey()); |
| final List<String> args = new ArrayList<String>(); |
| args.add("git"); |
| args.add("--git-dir=."); |
| args.add("diff-tree"); |
| if (key.getSourceFileName() != null) { |
| args.add("-M"); |
| } |
| args.add("--full-index"); |
| |
| if (key.getOldId() == null) { |
| args.add("--cc"); |
| } else { |
| args.add("--unified=1"); |
| args.add(key.getOldId().name()); |
| } |
| args.add(key.getNewId().name()); |
| args.add("--"); |
| args.add(key.getFileName()); |
| if (key.getSourceFileName() != null) { |
| args.add(key.getSourceFileName()); |
| } |
| |
| final Process proc = |
| Runtime.getRuntime().exec(args.toArray(new String[args.size()]), null, |
| db.getDirectory()); |
| final FileHeader file; |
| try { |
| final org.spearce.jgit.patch.Patch p = new org.spearce.jgit.patch.Patch(); |
| proc.getOutputStream().close(); |
| proc.getErrorStream().close(); |
| p.parse(proc.getInputStream()); |
| proc.getInputStream().close(); |
| |
| if (p.getFiles().isEmpty()) { |
| return new DiffCacheContent(); |
| |
| } else if (p.getFiles().size() != 1) { |
| throw new IOException("unexpected file count: " + key); |
| } |
| |
| file = p.getFiles().get(0); |
| } finally { |
| try { |
| if (proc.waitFor() != 0) { |
| throw new IOException("git diff-tree exited abnormally: " + key); |
| } |
| } catch (InterruptedException ie) { |
| } |
| } |
| |
| return DiffCacheContent.create(db, key, file); |
| } |
| |
| private Repository open(final Project.NameKey key) |
| throws InvalidRepositoryException { |
| return server.getRepositoryCache().get(key.get()); |
| } |
| } |