Line data    Source code

       1             : // Copyright (C) 2016 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.pgm.init.api;
      16             : 
      17             : import com.google.gerrit.entities.Project;
      18             : import com.google.gerrit.server.GerritPersonIdentProvider;
      19             : import com.google.gerrit.server.config.SitePaths;
      20             : import com.google.gerrit.server.git.meta.VersionedMetaData;
      21             : import java.io.File;
      22             : import java.io.IOException;
      23             : import java.nio.file.Path;
      24             : import org.eclipse.jgit.errors.ConfigInvalidException;
      25             : import org.eclipse.jgit.internal.storage.file.FileRepository;
      26             : import org.eclipse.jgit.lib.CommitBuilder;
      27             : import org.eclipse.jgit.lib.ObjectId;
      28             : import org.eclipse.jgit.lib.ObjectInserter;
      29             : import org.eclipse.jgit.lib.ObjectReader;
      30             : import org.eclipse.jgit.lib.PersonIdent;
      31             : import org.eclipse.jgit.lib.RefUpdate;
      32             : import org.eclipse.jgit.lib.Repository;
      33             : import org.eclipse.jgit.lib.RepositoryCache.FileKey;
      34             : import org.eclipse.jgit.revwalk.RevTree;
      35             : import org.eclipse.jgit.revwalk.RevWalk;
      36             : import org.eclipse.jgit.util.FS;
      37             : 
      38             : public abstract class VersionedMetaDataOnInit extends VersionedMetaData {
      39             : 
      40             :   protected final String project;
      41             :   private final InitFlags flags;
      42             :   private final SitePaths site;
      43             :   private final String ref;
      44             : 
      45          16 :   protected VersionedMetaDataOnInit(InitFlags flags, SitePaths site, String project, String ref) {
      46          16 :     this.flags = flags;
      47          16 :     this.site = site;
      48          16 :     this.project = project;
      49          16 :     this.ref = ref;
      50          16 :   }
      51             : 
      52             :   @Override
      53             :   protected String getRefName() {
      54          16 :     return ref;
      55             :   }
      56             : 
      57             :   public VersionedMetaDataOnInit load() throws IOException, ConfigInvalidException {
      58          16 :     File path = getPath();
      59          16 :     if (path != null) {
      60          16 :       try (Repository repo = new FileRepository(path)) {
      61          16 :         load(Project.nameKey(project), repo);
      62             :       }
      63             :     }
      64          16 :     return this;
      65             :   }
      66             : 
      67             :   public void save(String message) throws IOException, ConfigInvalidException {
      68           0 :     save(new GerritPersonIdentProvider(flags.cfg).get(), message);
      69           0 :   }
      70             : 
      71             :   protected void save(PersonIdent ident, String msg) throws IOException, ConfigInvalidException {
      72           0 :     File path = getPath();
      73           0 :     if (path == null) {
      74           0 :       throw new IOException(project + " does not exist.");
      75             :     }
      76             : 
      77           0 :     try (Repository repo = new FileRepository(path);
      78           0 :         ObjectInserter i = repo.newObjectInserter();
      79           0 :         ObjectReader r = repo.newObjectReader();
      80           0 :         RevWalk rw = new RevWalk(r)) {
      81           0 :       inserter = i;
      82           0 :       reader = r;
      83             : 
      84           0 :       RevTree srcTree = revision != null ? rw.parseTree(revision) : null;
      85           0 :       newTree = readTree(srcTree);
      86             : 
      87           0 :       CommitBuilder commit = new CommitBuilder();
      88           0 :       commit.setAuthor(ident);
      89           0 :       commit.setCommitter(ident);
      90           0 :       commit.setMessage(msg);
      91             : 
      92           0 :       onSave(commit);
      93             : 
      94           0 :       ObjectId res = newTree.writeTree(inserter);
      95           0 :       if (res.equals(srcTree)) {
      96           0 :         return;
      97             :       }
      98           0 :       commit.setTreeId(res);
      99             : 
     100           0 :       if (revision != null) {
     101           0 :         commit.addParentId(revision);
     102             :       }
     103           0 :       ObjectId newRevision = inserter.insert(commit);
     104           0 :       updateRef(repo, ident, newRevision, "commit: " + msg);
     105           0 :       revision = rw.parseCommit(newRevision);
     106           0 :     } finally {
     107           0 :       inserter = null;
     108           0 :       reader = null;
     109             :     }
     110           0 :   }
     111             : 
     112             :   private void updateRef(Repository repo, PersonIdent ident, ObjectId newRevision, String refLogMsg)
     113             :       throws IOException {
     114           0 :     RefUpdate ru = repo.updateRef(getRefName());
     115           0 :     ru.setRefLogIdent(ident);
     116           0 :     ru.setNewObjectId(newRevision);
     117           0 :     ru.setExpectedOldObjectId(revision);
     118           0 :     ru.setRefLogMessage(refLogMsg, false);
     119           0 :     RefUpdate.Result r = ru.update();
     120           0 :     switch (r) {
     121             :       case FAST_FORWARD:
     122             :       case NEW:
     123             :       case NO_CHANGE:
     124           0 :         break;
     125             :       case FORCED:
     126             :       case IO_FAILURE:
     127             :       case LOCK_FAILURE:
     128             :       case NOT_ATTEMPTED:
     129             :       case REJECTED:
     130             :       case REJECTED_CURRENT_BRANCH:
     131             :       case RENAMED:
     132             :       case REJECTED_MISSING_OBJECT:
     133             :       case REJECTED_OTHER_REASON:
     134             :       default:
     135           0 :         throw new IOException(
     136           0 :             "Failed to update " + getRefName() + " of " + project + ": " + r.name());
     137             :     }
     138           0 :   }
     139             : 
     140             :   private File getPath() {
     141          16 :     Path basePath = site.resolve(flags.cfg.getString("gerrit", null, "basePath"));
     142          16 :     if (basePath == null) {
     143           0 :       throw new IllegalStateException("gerrit.basePath must be configured");
     144             :     }
     145          16 :     return FileKey.resolve(basePath.resolve(project).toFile(), FS.DETECTED);
     146             :   }
     147             : }