1 files changed, 112 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/schema/Schema_161.java b/java/com/google/gerrit/server/schema/Schema_161.java
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+++ b/java/com/google/gerrit/server/schema/Schema_161.java
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+// Copyright (C) 2017 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.schema;
+
+import static java.util.stream.Collectors.toList;
+
+import com.google.common.primitives.Ints;
+import com.google.gerrit.reviewdb.client.RefNames;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.StarredChangesUtil;
+import com.google.gerrit.server.StarredChangesUtil.IllegalLabelException;
+import com.google.gerrit.server.StarredChangesUtil.StarRef;
+import com.google.gerrit.server.config.AllUsersName;
+import com.google.gerrit.server.git.GitRepositoryManager;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import java.io.IOException;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+import org.eclipse.jgit.lib.BatchRefUpdate;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.Ref;
+import org.eclipse.jgit.lib.Repository;
+import org.eclipse.jgit.lib.TextProgressMonitor;
+import org.eclipse.jgit.revwalk.RevWalk;
+import org.eclipse.jgit.transport.ReceiveCommand;
+
+public class Schema_161 extends SchemaVersion {
+  private static final String MUTE_LABEL = "mute";
+
+  private final GitRepositoryManager repoManager;
+  private final AllUsersName allUsersName;
+
+  @Inject
+  Schema_161(
+      Provider<Schema_160> prior, GitRepositoryManager repoManager, AllUsersName allUsersName) {
+    super(prior);
+    this.repoManager = repoManager;
+    this.allUsersName = allUsersName;
+  }
+
+  @Override
+  protected void migrateData(ReviewDb db, UpdateUI ui) throws OrmException {
+    try (Repository git = repoManager.openRepository(allUsersName);
+        RevWalk rw = new RevWalk(git)) {
+      BatchRefUpdate bru = git.getRefDatabase().newBatchUpdate();
+      bru.setAllowNonFastForwards(true);
+
+      for (Ref ref : git.getRefDatabase().getRefsByPrefix(RefNames.REFS_STARRED_CHANGES)) {
+        StarRef starRef = StarredChangesUtil.readLabels(git, ref.getName());
+
+        Set<Integer> mutedPatchSets =
+            StarredChangesUtil.getStarredPatchSets(starRef.labels(), MUTE_LABEL);
+        if (mutedPatchSets.isEmpty()) {
+          continue;
+        }
+
+        Set<Integer> reviewedPatchSets =
+            StarredChangesUtil.getStarredPatchSets(
+                starRef.labels(), StarredChangesUtil.REVIEWED_LABEL);
+        Set<Integer> unreviewedPatchSets =
+            StarredChangesUtil.getStarredPatchSets(
+                starRef.labels(), StarredChangesUtil.UNREVIEWED_LABEL);
+
+        List<String> newLabels =
+            starRef.labels().stream()
+                .map(
+                    l -> {
+                      if (l.startsWith(MUTE_LABEL)) {
+                        Integer mutedPatchSet = Ints.tryParse(l.substring(MUTE_LABEL.length() + 1));
+                        if (mutedPatchSet == null) {
+                          // unexpected format of mute label, must be a label that was manually
+                          // set, just leave it alone
+                          return l;
+                        }
+                        if (!reviewedPatchSets.contains(mutedPatchSet)
+                            && !unreviewedPatchSets.contains(mutedPatchSet)) {
+                          // convert mute label to reviewed label
+                          return StarredChangesUtil.REVIEWED_LABEL + "/" + mutedPatchSet;
+                        }
+                        // else patch set is muted but has either reviewed or unreviewed label
+                        // -> just drop the mute label
+                        return null;
+                      }
+                      return l;
+                    })
+                .filter(Objects::nonNull)
+                .collect(toList());
+
+        ObjectId id = StarredChangesUtil.writeLabels(git, newLabels);
+        bru.addCommand(new ReceiveCommand(ref.getTarget().getObjectId(), id, ref.getName()));
+      }
+      bru.execute(rw, new TextProgressMonitor());
+    } catch (IOException | IllegalLabelException ex) {
+      throw new OrmException(ex);
+    }
+  }
+}