Merge "gr-account-label to lit"
diff --git a/java/com/google/gerrit/acceptance/InMemoryTestingDatabaseModule.java b/java/com/google/gerrit/acceptance/InMemoryTestingDatabaseModule.java
index de9a43d..e4b0eea 100644
--- a/java/com/google/gerrit/acceptance/InMemoryTestingDatabaseModule.java
+++ b/java/com/google/gerrit/acceptance/InMemoryTestingDatabaseModule.java
@@ -21,7 +21,9 @@
 import com.google.gerrit.extensions.events.LifecycleListener;
 import com.google.gerrit.lifecycle.LifecycleModule;
 import com.google.gerrit.metrics.MetricMaker;
+import com.google.gerrit.server.config.FileBasedGlobalPluginConfigProvider;
 import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.gerrit.server.config.GlobalPluginConfigProvider;
 import com.google.gerrit.server.config.SitePath;
 import com.google.gerrit.server.config.SitePaths;
 import com.google.gerrit.server.config.TrackingFooters;
@@ -54,6 +56,7 @@
   @Override
   protected void configure() {
     bind(Config.class).annotatedWith(GerritServerConfig.class).toInstance(cfg);
+    bind(GlobalPluginConfigProvider.class).to(FileBasedGlobalPluginConfigProvider.class);
     bind(Path.class).annotatedWith(SitePath.class).toInstance(sitePath);
 
     if (repoManager != null) {
diff --git a/java/com/google/gerrit/server/CommentsUtil.java b/java/com/google/gerrit/server/CommentsUtil.java
index 344549e..b18f499 100644
--- a/java/com/google/gerrit/server/CommentsUtil.java
+++ b/java/com/google/gerrit/server/CommentsUtil.java
@@ -438,7 +438,7 @@
       // unignore the test in PortedCommentsIT.
       Map<String, FileDiffOutput> modifiedFiles =
           diffOperations.listModifiedFilesAgainstParent(
-              change.getProject(), patchset.commitId(), /* parentNum= */ null);
+              change.getProject(), patchset.commitId(), /* parentNum= */ 0);
       return modifiedFiles.isEmpty()
           ? null
           : modifiedFiles.values().iterator().next().oldCommitId();
diff --git a/java/com/google/gerrit/server/change/FileInfoJson.java b/java/com/google/gerrit/server/change/FileInfoJson.java
index ad6f9c7..ab557dc 100644
--- a/java/com/google/gerrit/server/change/FileInfoJson.java
+++ b/java/com/google/gerrit/server/change/FileInfoJson.java
@@ -46,7 +46,8 @@
    *
    * @param change a Gerrit change.
    * @param objectId a commit SHA-1 identifying a patchset commit.
-   * @param parentNum an integer identifying the parent number used for comparison.
+   * @param parentNum 1-based integer identifying the parent number used for comparison. If zero,
+   *     the only parent will be used or the auto-merge if {@code newCommit} is a merge commit.
    * @return a mapping of the file paths to their related diff information.
    */
   default Map<String, FileInfo> getFileInfoMap(Change change, ObjectId objectId, int parentNum)
@@ -74,7 +75,8 @@
    *
    * @param project a project identifying a repository.
    * @param objectId a commit SHA-1 identifying a patchset commit.
-   * @param parentNum an integer identifying the parent number used for comparison.
+   * @param parentNum 1-based integer identifying the parent number used for comparison. If zero,
+   *     the only parent will be used or the auto-merge if {@code newCommit} is a merge commit.
    * @return a mapping of the file paths to their related diff information.
    */
   Map<String, FileInfo> getFileInfoMap(Project.NameKey project, ObjectId objectId, int parentNum)
diff --git a/java/com/google/gerrit/server/change/FileInfoJsonNewImpl.java b/java/com/google/gerrit/server/change/FileInfoJsonNewImpl.java
index 1ca2c93..7277404 100644
--- a/java/com/google/gerrit/server/change/FileInfoJsonNewImpl.java
+++ b/java/com/google/gerrit/server/change/FileInfoJsonNewImpl.java
@@ -47,8 +47,11 @@
       throws ResourceConflictException, PatchListNotAvailableException {
     try {
       if (base == null) {
+        // Setting parentNum=0 requests the default parent, which is the only parent for
+        // single-parent commits, or the auto-merge otherwise
         return asFileInfo(
-            diffs.listModifiedFilesAgainstParent(change.getProject(), objectId, null));
+            diffs.listModifiedFilesAgainstParent(
+                change.getProject(), objectId, /* parentNum= */ 0));
       }
       return asFileInfo(diffs.listModifiedFiles(change.getProject(), base.commitId(), objectId));
     } catch (DiffNotAvailableException e) {
@@ -63,7 +66,7 @@
       throws ResourceConflictException, PatchListNotAvailableException {
     try {
       Map<String, FileDiffOutput> modifiedFiles =
-          diffs.listModifiedFilesAgainstParent(project, objectId, parent + 1);
+          diffs.listModifiedFilesAgainstParent(project, objectId, parent);
       return asFileInfo(modifiedFiles);
     } catch (DiffNotAvailableException e) {
       convertException(e);
diff --git a/java/com/google/gerrit/server/change/FileInfoJsonOldImpl.java b/java/com/google/gerrit/server/change/FileInfoJsonOldImpl.java
index 55d162a..0570296 100644
--- a/java/com/google/gerrit/server/change/FileInfoJsonOldImpl.java
+++ b/java/com/google/gerrit/server/change/FileInfoJsonOldImpl.java
@@ -60,10 +60,10 @@
       Project.NameKey project, ObjectId objectId, int parentNum)
       throws ResourceConflictException, PatchListNotAvailableException {
     PatchListKey key =
-        parentNum == -1
+        parentNum == 0
             ? PatchListKey.againstDefaultBase(objectId, Whitespace.IGNORE_NONE)
             : PatchListKey.againstParentNum(
-                parentNum + 1, objectId, DiffPreferencesInfo.Whitespace.IGNORE_NONE);
+                parentNum, objectId, DiffPreferencesInfo.Whitespace.IGNORE_NONE);
     return toFileInfoMap(project, key);
   }
 
diff --git a/java/com/google/gerrit/server/config/FileBasedGlobalPluginConfigProvider.java b/java/com/google/gerrit/server/config/FileBasedGlobalPluginConfigProvider.java
new file mode 100644
index 0000000..098d2c2
--- /dev/null
+++ b/java/com/google/gerrit/server/config/FileBasedGlobalPluginConfigProvider.java
@@ -0,0 +1,57 @@
+// Copyright (C) 2021 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.config;
+
+import com.google.common.flogger.FluentLogger;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import java.nio.file.Path;
+import org.eclipse.jgit.errors.ConfigInvalidException;
+import org.eclipse.jgit.lib.Config;
+import org.eclipse.jgit.storage.file.FileBasedConfig;
+import org.eclipse.jgit.util.FS;
+
+@Singleton
+public class FileBasedGlobalPluginConfigProvider implements GlobalPluginConfigProvider {
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+  private final SitePaths site;
+
+  @Inject
+  FileBasedGlobalPluginConfigProvider(SitePaths site) {
+    this.site = site;
+  }
+
+  @Override
+  public Config get(String pluginName) {
+    Path pluginConfigFile = site.etc_dir.resolve(pluginName + ".config");
+    FileBasedConfig cfg = new FileBasedConfig(pluginConfigFile.toFile(), FS.DETECTED);
+    if (!cfg.getFile().exists()) {
+      logger.atInfo().log("No %s; assuming defaults", pluginConfigFile.toAbsolutePath());
+      return cfg;
+    }
+
+    try {
+      cfg.load();
+    } catch (ConfigInvalidException e) {
+      // This is an error in user input, don't spam logs with a stack trace.
+      logger.atWarning().log(
+          "Failed to load %s: %s", pluginConfigFile.toAbsolutePath(), e.getMessage());
+    } catch (IOException e) {
+      logger.atWarning().withCause(e).log("Failed to load %s", pluginConfigFile.toAbsolutePath());
+    }
+    return cfg;
+  }
+}
diff --git a/java/com/google/gerrit/server/config/GerritServerConfigModule.java b/java/com/google/gerrit/server/config/GerritServerConfigModule.java
index 27d1d58..da85834 100644
--- a/java/com/google/gerrit/server/config/GerritServerConfigModule.java
+++ b/java/com/google/gerrit/server/config/GerritServerConfigModule.java
@@ -66,6 +66,7 @@
     bind(Config.class)
         .annotatedWith(GerritServerConfig.class)
         .toProvider(GerritServerConfigProvider.class);
+    bind(GlobalPluginConfigProvider.class).to(FileBasedGlobalPluginConfigProvider.class);
     bind(SecureStore.class).toProvider(SecureStoreProvider.class).in(SINGLETON);
     bind(Boolean.class)
         .annotatedWith(GerritIsReplica.class)
diff --git a/java/com/google/gerrit/server/config/GlobalPluginConfigProvider.java b/java/com/google/gerrit/server/config/GlobalPluginConfigProvider.java
new file mode 100644
index 0000000..847708a
--- /dev/null
+++ b/java/com/google/gerrit/server/config/GlobalPluginConfigProvider.java
@@ -0,0 +1,21 @@
+// Copyright (C) 2021 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.config;
+
+import org.eclipse.jgit.lib.Config;
+
+public interface GlobalPluginConfigProvider {
+  Config get(String pluginName);
+}
diff --git a/java/com/google/gerrit/server/config/PluginConfigFactory.java b/java/com/google/gerrit/server/config/PluginConfigFactory.java
index c49e928..bd4b661 100644
--- a/java/com/google/gerrit/server/config/PluginConfigFactory.java
+++ b/java/com/google/gerrit/server/config/PluginConfigFactory.java
@@ -16,7 +16,6 @@
 
 import static com.google.gerrit.server.project.ProjectCache.noSuchProject;
 
-import com.google.common.flogger.FluentLogger;
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.plugins.Plugin;
 import com.google.gerrit.server.plugins.ReloadPluginListener;
@@ -28,22 +27,15 @@
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 import com.google.inject.Singleton;
-import java.io.IOException;
-import java.nio.file.Path;
 import java.util.HashMap;
 import java.util.Map;
-import org.eclipse.jgit.errors.ConfigInvalidException;
 import org.eclipse.jgit.lib.Config;
-import org.eclipse.jgit.storage.file.FileBasedConfig;
-import org.eclipse.jgit.util.FS;
 
 @Singleton
 public class PluginConfigFactory implements ReloadPluginListener {
-  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
-
   private static final String EXTENSION = ".config";
 
-  private final SitePaths site;
+  private final GlobalPluginConfigProvider globalPluginConfigProvider;
   private final Provider<Config> cfgProvider;
   private final ProjectCache projectCache;
   private final ProjectState.Factory projectStateFactory;
@@ -54,12 +46,12 @@
 
   @Inject
   PluginConfigFactory(
-      SitePaths site,
       @GerritServerConfig Provider<Config> cfgProvider,
+      GlobalPluginConfigProvider globalPluginConfigProvider,
       ProjectCache projectCache,
       ProjectState.Factory projectStateFactory,
       SecureStore secureStore) {
-    this.site = site;
+    this.globalPluginConfigProvider = globalPluginConfigProvider;
     this.cfgProvider = cfgProvider;
     this.projectCache = projectCache;
     this.projectStateFactory = projectStateFactory;
@@ -211,25 +203,9 @@
       return pluginConfigs.get(pluginName);
     }
 
-    Path pluginConfigFile = site.etc_dir.resolve(pluginName + ".config");
-    FileBasedConfig cfg = new FileBasedConfig(pluginConfigFile.toFile(), FS.DETECTED);
+    Config cfg = globalPluginConfigProvider.get(pluginName);
     GlobalPluginConfig pluginConfig = new GlobalPluginConfig(pluginName, cfg, secureStore);
     pluginConfigs.put(pluginName, pluginConfig);
-    if (!cfg.getFile().exists()) {
-      logger.atInfo().log("No %s; assuming defaults", pluginConfigFile.toAbsolutePath());
-      return pluginConfig;
-    }
-
-    try {
-      cfg.load();
-    } catch (ConfigInvalidException e) {
-      // This is an error in user input, don't spam logs with a stack trace.
-      logger.atWarning().log(
-          "Failed to load %s: %s", pluginConfigFile.toAbsolutePath(), e.getMessage());
-    } catch (IOException e) {
-      logger.atWarning().withCause(e).log("Failed to load %s", pluginConfigFile.toAbsolutePath());
-    }
-
     return pluginConfig;
   }
 
diff --git a/java/com/google/gerrit/server/events/EventFactory.java b/java/com/google/gerrit/server/events/EventFactory.java
index 3a4dcff..3f988a3 100644
--- a/java/com/google/gerrit/server/events/EventFactory.java
+++ b/java/com/google/gerrit/server/events/EventFactory.java
@@ -399,7 +399,7 @@
     try {
       Map<String, FileDiffOutput> modifiedFiles =
           diffOperations.listModifiedFilesAgainstParent(
-              change.getProject(), patchSet.commitId(), /* parent= */ null);
+              change.getProject(), patchSet.commitId(), /* parent= */ 0);
 
       for (FileDiffOutput diff : modifiedFiles.values()) {
         if (patchSetAttribute.files == null) {
@@ -456,7 +456,7 @@
 
       Map<String, FileDiffOutput> modifiedFiles =
           diffOperations.listModifiedFilesAgainstParent(
-              change.getProject(), patchSet.commitId(), /* parent= */ null);
+              change.getProject(), patchSet.commitId(), /* parent= */ 0);
       for (FileDiffOutput fileDiff : modifiedFiles.values()) {
         p.sizeDeletions += fileDiff.deletions();
         p.sizeInsertions += fileDiff.insertions();
diff --git a/java/com/google/gerrit/server/patch/DiffOperations.java b/java/com/google/gerrit/server/patch/DiffOperations.java
index 7213581..d2da736 100644
--- a/java/com/google/gerrit/server/patch/DiffOperations.java
+++ b/java/com/google/gerrit/server/patch/DiffOperations.java
@@ -46,8 +46,8 @@
    *
    * @param project a project name representing a git repository.
    * @param newCommit 20 bytes SHA-1 of the new commit used in the diff.
-   * @param parentNum integer specifying which parent to use as base. If null, the only parent will
-   *     be used or the auto-merge if {@code newCommit} is a merge commit.
+   * @param parentNum 1-based integer specifying which parent to use as base. If zero, the only
+   *     parent will be used or the auto-merge if {@code newCommit} is a merge commit.
    * @return map of file paths to the file diffs. The map key is the new file path for all {@link
    *     ChangeType} file diffs except {@link ChangeType#DELETED} entries where the map key contains
    *     the old file path. The map entries are not sorted by key.
@@ -56,8 +56,7 @@
    *     an internal error occurred in Git while evaluating the diff.
    */
   Map<String, FileDiffOutput> listModifiedFilesAgainstParent(
-      Project.NameKey project, ObjectId newCommit, @Nullable Integer parentNum)
-      throws DiffNotAvailableException;
+      Project.NameKey project, ObjectId newCommit, int parentNum) throws DiffNotAvailableException;
 
   /**
    * Returns the list of added, deleted or modified files between two commits (patchsets). The
@@ -85,8 +84,8 @@
    *
    * @param project a project name representing a git repository.
    * @param newCommit 20 bytes SHA-1 of the new commit used in the diff.
-   * @param parentNum integer specifying which parent to use as base. If null, the only parent will
-   *     be used or the auto-merge if {@code newCommit} is a merge commit.
+   * @param parentNum 1-based integer specifying which parent to use as base. If zero, the only
+   *     parent will be used or the auto-merge if {@code newCommit} is a merge commit.
    * @param fileName the file name for which the diff should be evaluated.
    * @param whitespace preference controlling whitespace effect in diff computation.
    * @return the diff for the single file between the two commits.
@@ -96,7 +95,7 @@
   FileDiffOutput getModifiedFileAgainstParent(
       Project.NameKey project,
       ObjectId newCommit,
-      @Nullable Integer parentNum,
+      int parentNum,
       String fileName,
       @Nullable DiffPreferencesInfo.Whitespace whitespace)
       throws DiffNotAvailableException;
diff --git a/java/com/google/gerrit/server/patch/DiffOperationsImpl.java b/java/com/google/gerrit/server/patch/DiffOperationsImpl.java
index f500796..3423b32 100644
--- a/java/com/google/gerrit/server/patch/DiffOperationsImpl.java
+++ b/java/com/google/gerrit/server/patch/DiffOperationsImpl.java
@@ -91,8 +91,7 @@
 
   @Override
   public Map<String, FileDiffOutput> listModifiedFilesAgainstParent(
-      Project.NameKey project, ObjectId newCommit, @Nullable Integer parent)
-      throws DiffNotAvailableException {
+      Project.NameKey project, ObjectId newCommit, int parent) throws DiffNotAvailableException {
     try {
       DiffParameters diffParams = computeDiffParameters(project, newCommit, parent);
       return getModifiedFiles(diffParams);
@@ -120,7 +119,7 @@
   public FileDiffOutput getModifiedFileAgainstParent(
       Project.NameKey project,
       ObjectId newCommit,
-      @Nullable Integer parent,
+      int parent,
       String fileName,
       @Nullable DiffPreferencesInfo.Whitespace whitespace)
       throws DiffNotAvailableException {
@@ -376,7 +375,7 @@
       Project.NameKey project, ObjectId newCommit, Integer parent) throws IOException {
     DiffParameters.Builder result =
         DiffParameters.builder().project(project).newCommit(newCommit).parent(parent);
-    if (parent != null) {
+    if (parent > 0) {
       result.baseCommit(baseCommitUtil.getBaseCommit(project, newCommit, parent));
       result.comparisonType(ComparisonType.againstParent(parent));
       return result.build();
diff --git a/java/com/google/gerrit/server/patch/PatchScriptFactory.java b/java/com/google/gerrit/server/patch/PatchScriptFactory.java
index 0c648b5..fbb6559 100644
--- a/java/com/google/gerrit/server/patch/PatchScriptFactory.java
+++ b/java/com/google/gerrit/server/patch/PatchScriptFactory.java
@@ -172,7 +172,7 @@
 
     this.fileName = fileName;
     this.psa = patchSetA;
-    this.parentNum = -1;
+    this.parentNum = 0;
     this.psb = patchSetB;
     this.diffPrefs = diffPrefs;
     this.currentUser = currentUser;
@@ -223,7 +223,7 @@
     this.runNewDiffCache = cfg.getBoolean("cache", "diff_cache", "runNewDiffCache_GetDiff", false);
 
     changeId = patchSetB.changeId();
-    checkArgument(parentNum >= 0, "parentNum must be >= 0");
+    checkArgument(parentNum > 0, "parentNum must be > 0");
   }
 
   @Override
@@ -326,11 +326,7 @@
     FileDiffOutput fileDiffOutput =
         aId == null
             ? diffOperations.getModifiedFileAgainstParent(
-                notes.getProjectName(),
-                bId,
-                parentNum == -1 ? null : parentNum + 1,
-                fileName,
-                diffPrefs.ignoreWhitespace)
+                notes.getProjectName(), bId, parentNum, fileName, diffPrefs.ignoreWhitespace)
             : diffOperations.getModifiedFile(
                 notes.getProjectName(), aId, bId, fileName, diffPrefs.ignoreWhitespace);
     return newBuilder().toPatchScriptNew(git, fileDiffOutput);
@@ -395,7 +391,7 @@
     if (psa == null) {
       return Optional.empty();
     }
-    checkState(parentNum < 0, "expected no parentNum when psa is present");
+    checkState(parentNum == 0, "expected no parentNum when psa is present");
     checkArgument(psa.get() != 0, "edit not supported for left side");
     return Optional.of(getCommitId(psa));
   }
@@ -409,10 +405,10 @@
   }
 
   private PatchListKey keyFor(ObjectId aId, ObjectId bId, Whitespace whitespace) {
-    if (parentNum < 0) {
+    if (parentNum == 0) {
       return PatchListKey.againstCommit(aId, bId, whitespace);
     }
-    return PatchListKey.againstParentNum(parentNum + 1, bId, whitespace);
+    return PatchListKey.againstParentNum(parentNum, bId, whitespace);
   }
 
   private PatchList listFor(PatchListKey key) throws PatchListNotAvailableException {
diff --git a/java/com/google/gerrit/server/restapi/change/Files.java b/java/com/google/gerrit/server/restapi/change/Files.java
index 1efe378..320e57d 100644
--- a/java/com/google/gerrit/server/restapi/change/Files.java
+++ b/java/com/google/gerrit/server/restapi/change/Files.java
@@ -183,7 +183,7 @@
         r =
             Response.ok(
                 fileInfoJson.getFileInfoMap(
-                    resource.getChange(), resource.getPatchSet().commitId(), parentNum - 1));
+                    resource.getChange(), resource.getPatchSet().commitId(), parentNum));
       } else {
         r = Response.ok(fileInfoJson.getFileInfoMap(resource.getChange(), resource.getPatchSet()));
       }
@@ -280,11 +280,11 @@
 
         Map<String, FileDiffOutput> oldList =
             diffOperations.listModifiedFilesAgainstParent(
-                project, patchSet.commitId(), /* parentNum= */ null);
+                project, patchSet.commitId(), /* parentNum= */ 0);
 
         Map<String, FileDiffOutput> curList =
             diffOperations.listModifiedFilesAgainstParent(
-                project, resource.getPatchSet().commitId(), /* parentNum= */ null);
+                project, resource.getPatchSet().commitId(), /* parentNum= */ 0);
 
         int sz = paths.size();
         List<String> pathList = Lists.newArrayListWithCapacity(sz);
diff --git a/java/com/google/gerrit/server/restapi/change/GetDiff.java b/java/com/google/gerrit/server/restapi/change/GetDiff.java
index 2169d57..dd951a8 100644
--- a/java/com/google/gerrit/server/restapi/change/GetDiff.java
+++ b/java/com/google/gerrit/server/restapi/change/GetDiff.java
@@ -74,6 +74,7 @@
   @Option(name = "--base", metaVar = "REVISION")
   String base;
 
+  /** 1-based index of the parent's position in the commit object. */
   @Option(name = "--parent", metaVar = "parent-number")
   int parentNum;
 
@@ -143,7 +144,7 @@
     } else if (parentNum > 0) {
       psf =
           patchScriptFactoryFactory.create(
-              notes, fileName, parentNum - 1, pId, prefs, currentUser.get());
+              notes, fileName, parentNum, pId, prefs, currentUser.get());
     } else {
       psf = patchScriptFactoryFactory.create(notes, fileName, null, pId, prefs, currentUser.get());
     }
diff --git a/java/com/google/gerrit/server/restapi/project/FilesInCommitCollection.java b/java/com/google/gerrit/server/restapi/project/FilesInCommitCollection.java
index 7bee2f2..6d054bd 100644
--- a/java/com/google/gerrit/server/restapi/project/FilesInCommitCollection.java
+++ b/java/com/google/gerrit/server/restapi/project/FilesInCommitCollection.java
@@ -77,6 +77,10 @@
   }
 
   public static final class ListFiles implements RestReadView<CommitResource> {
+    /**
+     * The 1-based parent number. If zero, the default base commit will be used, which is the only
+     * parent for commits having one parent or the auto-merge commit otherwise.
+     */
     @Option(name = "--parent", metaVar = "parent-number")
     int parentNum;
 
@@ -97,8 +101,7 @@
         throws ResourceConflictException, PatchListNotAvailableException {
       RevCommit commit = resource.getCommit();
       return Response.ok(
-          fileInfoJson.getFileInfoMap(
-              resource.getProjectState().getNameKey(), commit, parentNum - 1));
+          fileInfoJson.getFileInfoMap(resource.getProjectState().getNameKey(), commit, parentNum));
     }
   }
 }
diff --git a/java/com/google/gerrit/testing/InMemoryModule.java b/java/com/google/gerrit/testing/InMemoryModule.java
index f28f60f..06d9453 100644
--- a/java/com/google/gerrit/testing/InMemoryModule.java
+++ b/java/com/google/gerrit/testing/InMemoryModule.java
@@ -54,6 +54,7 @@
 import com.google.gerrit.server.config.CanonicalWebUrlModule;
 import com.google.gerrit.server.config.CanonicalWebUrlProvider;
 import com.google.gerrit.server.config.DefaultUrlFormatter;
+import com.google.gerrit.server.config.FileBasedGlobalPluginConfigProvider;
 import com.google.gerrit.server.config.GerritGlobalModule;
 import com.google.gerrit.server.config.GerritInstanceIdModule;
 import com.google.gerrit.server.config.GerritInstanceNameModule;
@@ -62,6 +63,7 @@
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.config.GerritServerId;
 import com.google.gerrit.server.config.GerritServerIdProvider;
+import com.google.gerrit.server.config.GlobalPluginConfigProvider;
 import com.google.gerrit.server.config.SendEmailExecutor;
 import com.google.gerrit.server.config.SitePath;
 import com.google.gerrit.server.config.TrackingFooters;
@@ -195,6 +197,7 @@
     bind(Path.class).annotatedWith(SitePath.class).toInstance(Paths.get("."));
     bind(Config.class).annotatedWith(GerritServerConfig.class).toInstance(cfg);
     bind(GerritOptions.class).toInstance(new GerritOptions(false, false));
+    bind(GlobalPluginConfigProvider.class).to(FileBasedGlobalPluginConfigProvider.class);
 
     bind(GitRepositoryManager.class).to(InMemoryRepositoryManager.class);
     bind(InMemoryRepositoryManager.class).in(SINGLETON);
diff --git a/javatests/com/google/gerrit/acceptance/api/revision/RevisionDiffIT.java b/javatests/com/google/gerrit/acceptance/api/revision/RevisionDiffIT.java
index d8dab33..a01b340 100644
--- a/javatests/com/google/gerrit/acceptance/api/revision/RevisionDiffIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/revision/RevisionDiffIT.java
@@ -153,7 +153,8 @@
     PushOneCommit.Result result = push.to("refs/heads/master");
 
     Map<String, FileDiffOutput> modifiedFiles =
-        diffOperations.listModifiedFilesAgainstParent(project, result.getCommit(), null);
+        diffOperations.listModifiedFilesAgainstParent(
+            project, result.getCommit(), /* parentNum= */ 0);
 
     assertThat(modifiedFiles.keySet()).containsExactly("/COMMIT_MSG", "f.txt");
     assertThat(
diff --git a/javatests/com/google/gerrit/server/patch/DiffOperationsTest.java b/javatests/com/google/gerrit/server/patch/DiffOperationsTest.java
index 5bf5154..aa313e3 100644
--- a/javatests/com/google/gerrit/server/patch/DiffOperationsTest.java
+++ b/javatests/com/google/gerrit/server/patch/DiffOperationsTest.java
@@ -72,7 +72,7 @@
 
     FileDiffOutput diffOutput =
         diffOperations.getModifiedFileAgainstParent(
-            testProjectName, newCommitId, /* parentNum=*/ null, fileName2, /* whitespace=*/ null);
+            testProjectName, newCommitId, /* parentNum=*/ 0, fileName2, /* whitespace=*/ null);
 
     assertThat(diffOutput.oldCommitId()).isEqualTo(oldCommitId);
     assertThat(diffOutput.newCommitId()).isEqualTo(newCommitId);
diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
index a0b1794..fce7db9 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
@@ -1486,6 +1486,7 @@
   }
 
   _handleDeleteConfirm() {
+    this._hideAllDialogs();
     this._fireAction(
       '/',
       assertUIActionInfo(this.actions[ChangeActions.DELETE]),