Line data    Source code

       1             : // Copyright (C) 2013 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.server.restapi.change;
      16             : 
      17             : import static com.google.gerrit.server.project.ProjectCache.illegalState;
      18             : 
      19             : import com.google.gerrit.entities.Change;
      20             : import com.google.gerrit.entities.Patch;
      21             : import com.google.gerrit.entities.PatchSet;
      22             : import com.google.gerrit.extensions.restapi.BadRequestException;
      23             : import com.google.gerrit.extensions.restapi.BinaryResult;
      24             : import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
      25             : import com.google.gerrit.extensions.restapi.Response;
      26             : import com.google.gerrit.extensions.restapi.RestReadView;
      27             : import com.google.gerrit.server.PatchSetUtil;
      28             : import com.google.gerrit.server.change.FileContentUtil;
      29             : import com.google.gerrit.server.change.FileResource;
      30             : import com.google.gerrit.server.git.GitRepositoryManager;
      31             : import com.google.gerrit.server.notedb.ChangeNotes;
      32             : import com.google.gerrit.server.patch.ComparisonType;
      33             : import com.google.gerrit.server.patch.Text;
      34             : import com.google.gerrit.server.project.NoSuchChangeException;
      35             : import com.google.gerrit.server.project.ProjectCache;
      36             : import com.google.inject.Inject;
      37             : import java.io.IOException;
      38             : import org.eclipse.jgit.errors.RepositoryNotFoundException;
      39             : import org.eclipse.jgit.lib.Repository;
      40             : import org.eclipse.jgit.revwalk.RevCommit;
      41             : import org.eclipse.jgit.revwalk.RevWalk;
      42             : import org.kohsuke.args4j.Option;
      43             : 
      44             : public class GetContent implements RestReadView<FileResource> {
      45             :   private final GitRepositoryManager gitManager;
      46             :   private final PatchSetUtil psUtil;
      47             :   private final FileContentUtil fileContentUtil;
      48             :   private final ProjectCache projectCache;
      49             : 
      50             :   @Option(name = "--parent")
      51             :   private Integer parent;
      52             : 
      53             :   @Inject
      54             :   GetContent(
      55             :       GitRepositoryManager gitManager,
      56             :       PatchSetUtil psUtil,
      57             :       FileContentUtil fileContentUtil,
      58          15 :       ProjectCache projectCache) {
      59          15 :     this.gitManager = gitManager;
      60          15 :     this.psUtil = psUtil;
      61          15 :     this.fileContentUtil = fileContentUtil;
      62          15 :     this.projectCache = projectCache;
      63          15 :   }
      64             : 
      65             :   @Override
      66             :   public Response<BinaryResult> apply(FileResource rsrc)
      67             :       throws ResourceNotFoundException, IOException, BadRequestException {
      68          12 :     String path = rsrc.getPatchKey().fileName();
      69          12 :     if (Patch.COMMIT_MSG.equals(path)) {
      70           2 :       String msg = getMessage(rsrc.getRevision().getChangeResource().getNotes());
      71           2 :       return Response.ok(
      72           2 :           BinaryResult.create(msg)
      73           2 :               .setContentType(FileContentUtil.TEXT_X_GERRIT_COMMIT_MESSAGE)
      74           2 :               .base64());
      75          12 :     } else if (Patch.MERGE_LIST.equals(path)) {
      76           1 :       byte[] mergeList = getMergeList(rsrc.getRevision().getChangeResource().getNotes());
      77           1 :       return Response.ok(
      78           1 :           BinaryResult.create(mergeList)
      79           1 :               .setContentType(FileContentUtil.TEXT_X_GERRIT_MERGE_LIST)
      80           1 :               .base64());
      81             :     }
      82          11 :     return Response.ok(
      83          11 :         fileContentUtil.getContent(
      84             :             projectCache
      85          11 :                 .get(rsrc.getRevision().getProject())
      86          11 :                 .orElseThrow(illegalState(rsrc.getRevision().getProject())),
      87          11 :             rsrc.getRevision().getPatchSet().commitId(),
      88             :             path,
      89             :             parent));
      90             :   }
      91             : 
      92             :   private String getMessage(ChangeNotes notes) throws IOException {
      93           2 :     Change.Id changeId = notes.getChangeId();
      94           2 :     PatchSet ps = psUtil.current(notes);
      95           2 :     if (ps == null) {
      96           0 :       throw new NoSuchChangeException(changeId);
      97             :     }
      98             : 
      99           2 :     try (Repository git = gitManager.openRepository(notes.getProjectName());
     100           2 :         RevWalk revWalk = new RevWalk(git)) {
     101           2 :       RevCommit commit = revWalk.parseCommit(ps.commitId());
     102           2 :       return commit.getFullMessage();
     103           0 :     } catch (RepositoryNotFoundException e) {
     104           0 :       throw new NoSuchChangeException(changeId, e);
     105             :     }
     106             :   }
     107             : 
     108             :   private byte[] getMergeList(ChangeNotes notes) throws IOException {
     109           1 :     Change.Id changeId = notes.getChangeId();
     110           1 :     PatchSet ps = psUtil.current(notes);
     111           1 :     if (ps == null) {
     112           0 :       throw new NoSuchChangeException(changeId);
     113             :     }
     114             : 
     115           1 :     try (Repository git = gitManager.openRepository(notes.getProjectName());
     116           1 :         RevWalk revWalk = new RevWalk(git)) {
     117           1 :       return Text.forMergeList(
     118           1 :               ComparisonType.againstAutoMerge(), revWalk.getObjectReader(), ps.commitId())
     119           1 :           .getContent();
     120           0 :     } catch (RepositoryNotFoundException e) {
     121           0 :       throw new NoSuchChangeException(changeId, e);
     122             :     }
     123             :   }
     124             : }