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.server.project;
      16             : 
      17             : import static org.eclipse.jgit.lib.Constants.R_REFS;
      18             : import static org.eclipse.jgit.lib.Constants.R_TAGS;
      19             : 
      20             : import com.google.common.collect.Iterables;
      21             : import com.google.gerrit.entities.RefNames;
      22             : import com.google.gerrit.extensions.restapi.BadRequestException;
      23             : import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
      24             : import java.io.IOException;
      25             : import java.util.Collections;
      26             : import org.eclipse.jgit.errors.IncorrectObjectTypeException;
      27             : import org.eclipse.jgit.errors.MissingObjectException;
      28             : import org.eclipse.jgit.errors.RevisionSyntaxException;
      29             : import org.eclipse.jgit.lib.Constants;
      30             : import org.eclipse.jgit.lib.ObjectId;
      31             : import org.eclipse.jgit.lib.Ref;
      32             : import org.eclipse.jgit.lib.RefDatabase;
      33             : import org.eclipse.jgit.lib.Repository;
      34             : import org.eclipse.jgit.revwalk.ObjectWalk;
      35             : import org.eclipse.jgit.revwalk.RevWalk;
      36             : 
      37             : public class RefUtil {
      38             :   private RefUtil() {}
      39             : 
      40             :   public static ObjectId parseBaseRevision(Repository repo, String baseRevision)
      41             :       throws UnprocessableEntityException, IOException {
      42             :     try {
      43          32 :       ObjectId revid = repo.resolve(baseRevision);
      44          32 :       if (revid == null) {
      45           1 :         throw new UnprocessableEntityException(
      46           1 :             String.format("base revision \"%s\" not found", baseRevision));
      47             :       }
      48          32 :       return revid;
      49           2 :     } catch (RevisionSyntaxException e) {
      50           2 :       throw new UnprocessableEntityException(
      51           2 :           String.format("base revision \"%s\" is invalid", baseRevision), e);
      52             :     }
      53             :   }
      54             : 
      55             :   public static RevWalk verifyConnected(Repository repo, ObjectId baseRevision)
      56             :       throws BadRequestException, UnprocessableEntityException, IOException {
      57             :     try {
      58          32 :       ObjectWalk rw = new ObjectWalk(repo);
      59          32 :       rw.markStart(rw.parseCommit(baseRevision));
      60          32 :       RefDatabase refDb = repo.getRefDatabase();
      61          32 :       Iterable<Ref> refs =
      62          32 :           Iterables.concat(
      63          32 :               refDb.getRefsByPrefix(Constants.R_HEADS), refDb.getRefsByPrefix(Constants.R_TAGS));
      64          32 :       Ref rc = refDb.exactRef(RefNames.REFS_CONFIG);
      65          32 :       if (rc != null) {
      66          32 :         refs = Iterables.concat(refs, Collections.singleton(rc));
      67             :       }
      68          32 :       for (Ref r : refs) {
      69             :         try {
      70          32 :           rw.markUninteresting(rw.parseAny(r.getObjectId()));
      71           0 :         } catch (MissingObjectException err) {
      72           0 :           continue;
      73          32 :         }
      74          32 :       }
      75          32 :       rw.checkConnectivity();
      76          32 :       return rw;
      77           2 :     } catch (IncorrectObjectTypeException e) {
      78           2 :       throw new BadRequestException(
      79           2 :           String.format("base revision \"%s\" is not a commit", baseRevision.name()), e);
      80           2 :     } catch (MissingObjectException e) {
      81           2 :       throw new UnprocessableEntityException(
      82           2 :           String.format("base revision \"%s\" not found", baseRevision.name()), e);
      83             :     }
      84             :   }
      85             : 
      86             :   public static String getRefPrefix(String refName) {
      87           1 :     int i = refName.lastIndexOf('/');
      88           1 :     if (i > Constants.R_HEADS.length() - 1) {
      89           1 :       return refName.substring(0, i);
      90             :     }
      91           0 :     return Constants.R_HEADS;
      92             :   }
      93             : 
      94             :   /** Fully qualifies a tag name to refs/tags/TAG-NAME */
      95             :   public static String normalizeTagRef(String tag) throws BadRequestException {
      96           7 :     String result = tag;
      97           7 :     while (result.startsWith("/")) {
      98           1 :       result = result.substring(1);
      99             :     }
     100           7 :     if (result.startsWith(R_REFS) && !result.startsWith(R_TAGS)) {
     101           1 :       throw new BadRequestException("invalid tag name \"" + result + "\"");
     102             :     }
     103           7 :     if (!result.startsWith(R_TAGS)) {
     104           6 :       result = R_TAGS + result;
     105             :     }
     106           7 :     if (!Repository.isValidRefName(result)) {
     107           1 :       throw new BadRequestException("invalid tag name \"" + result + "\"");
     108             :     }
     109           7 :     return result;
     110             :   }
     111             : }