Add option to match author timestamp and committed timestamp

When true, the author date is changed to match the submitter date
upon submission of a change. This is done so that git log will show
the submission date instead of the author date, which it does by
default.

This option only takes effect in submit strategies which already modify
the commit, i.e. Cherry Pick, Rebase Always, and (perhaps) Rebase If
Necessary.

Bug: https://crbug.com/732968
Change-Id: I64133a3e494e8c6364cd210f68979aaff74cb222

gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminConstants.java

@@ -77,6 +77,8 @@ public interface AdminConstants extends Constants {
 
   String enableReviewerByEmail();
 
+  String matchAuthorToCommitterDate();
+
   String headingMaxObjectSizeLimit();
 
   String headingGroupOptions();

gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminConstants.properties

@@ -38,6 +38,7 @@ headingParentProjectName = Rights Inherit From
 parentSuggestions = Parent Suggestion
 columnProjectName = Project Name
 enableReviewerByEmail = Enable adding unregistered users as reviewers and CCs on changes
+matchAuthorToCommitterDate = Match authored date with committer date upon submit
 
 headingGroupUUID = Group UUID
 headingOwner = Owners

gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/ProjectInfoScreen.java

@@ -87,6 +87,7 @@ public class ProjectInfoScreen extends ProjectScreen {
   private ListBox requireSignedPush;
   private ListBox rejectImplicitMerges;
   private ListBox enableReviewerByEmail;
+  private ListBox matchAuthorToCommitterDate;
   private NpTextBox maxObjectSizeLimit;
   private Label effectiveMaxObjectSizeLimit;
   private Map<String, Map<String, HasEnabled>> pluginConfigWidgets;
@@ -193,6 +194,7 @@ public class ProjectInfoScreen extends ProjectScreen {
     rejectImplicitMerges.setEnabled(isOwner);
     maxObjectSizeLimit.setEnabled(isOwner);
     enableReviewerByEmail.setEnabled(isOwner);
+    matchAuthorToCommitterDate.setEnabled(isOwner);
 
     if (pluginConfigWidgets != null) {
       for (Map<String, HasEnabled> widgetMap : pluginConfigWidgets.values()) {
@@ -270,6 +272,10 @@ public class ProjectInfoScreen extends ProjectScreen {
     saveEnabler.listenTo(enableReviewerByEmail);
     grid.addHtml(AdminConstants.I.enableReviewerByEmail(), enableReviewerByEmail);
 
+    matchAuthorToCommitterDate = newInheritedBooleanBox();
+    saveEnabler.listenTo(matchAuthorToCommitterDate);
+    grid.addHtml(AdminConstants.I.matchAuthorToCommitterDate(), matchAuthorToCommitterDate);
+
     maxObjectSizeLimit = new NpTextBox();
     saveEnabler.listenTo(maxObjectSizeLimit);
     effectiveMaxObjectSizeLimit = new Label();
@@ -402,6 +408,7 @@ public class ProjectInfoScreen extends ProjectScreen {
     }
     setBool(rejectImplicitMerges, result.rejectImplicitMerges());
     setBool(enableReviewerByEmail, result.enableReviewerByEmail());
+    setBool(matchAuthorToCommitterDate, result.matchAuthorToCommitterDate());
     setSubmitType(result.submitType());
     setState(result.state());
     maxObjectSizeLimit.setText(result.maxObjectSizeLimit().configuredValue());
@@ -673,6 +680,7 @@ public class ProjectInfoScreen extends ProjectScreen {
         rsp,
         getBool(rejectImplicitMerges),
         getBool(enableReviewerByEmail),
+        getBool(matchAuthorToCommitterDate),
         maxObjectSizeLimit.getText().trim(),
         SubmitType.valueOf(submitType.getValue(submitType.getSelectedIndex())),
         ProjectState.valueOf(state.getValue(state.getSelectedIndex())),

gerrit-gwtui/src/main/java/com/google/gerrit/client/projects/ConfigInfo.java

@@ -60,6 +60,9 @@ public class ConfigInfo extends JavaScriptObject {
   public final native InheritedBooleanInfo enableReviewerByEmail()
       /*-{ return this.enable_reviewer_by_email; }-*/ ;
 
+  public final native InheritedBooleanInfo matchAuthorToCommitterDate()
+      /*-{ return this.match_author_to_committer_date; }-*/ ;
+
   public final SubmitType submitType() {
     return SubmitType.valueOf(submitTypeRaw());
   }

gerrit-gwtui/src/main/java/com/google/gerrit/client/projects/ProjectApi.java

@@ -148,6 +148,7 @@ public class ProjectApi {
       InheritableBoolean requireSignedPush,
       InheritableBoolean rejectImplicitMerges,
       InheritableBoolean enableReviewerByEmail,
+      InheritableBoolean matchAuthorToCommitterDate,
       String maxObjectSizeLimit,
       SubmitType submitType,
       ProjectState state,
@@ -172,6 +173,7 @@ public class ProjectApi {
     in.setState(state);
     in.setPluginConfigValues(pluginConfigValues);
     in.setEnableReviewerByEmail(enableReviewerByEmail);
+    in.setMatchAuthorToCommitterDate(matchAuthorToCommitterDate);
 
     project(name).view("config").put(in, cb);
   }
@@ -300,6 +302,13 @@ public class ProjectApi {
       setEnableReviewerByEmailRaw(v.name());
     }
 
+    final void setMatchAuthorToCommitterDate(InheritableBoolean v) {
+      setMatchAuthorToCommitterDateRaw(v.name());
+    }
+
+    private native void setMatchAuthorToCommitterDateRaw(String v)
+        /*-{ if(v)this.match_author_to_committer_date=v; }-*/ ;
+
     private native void setEnableReviewerByEmailRaw(String v)
         /*-{ if(v)this.enable_reviewer_by_email=v; }-*/ ;