Merge changes from topic 'author-commiter-timestamp'

* changes:
  Implement MatchAuthorToCommitterDate for applicable strategies
  Add option to match author timestamp and committed timestamp

gerrit-server/src/main/java/com/google/gerrit/server/git/MergeUtil.java

@@ -248,6 +248,7 @@ public class MergeUtil {
       mergeCommit.setAuthor(originalCommit.getAuthorIdent());
       mergeCommit.setCommitter(cherryPickCommitterIdent);
       mergeCommit.setMessage(commitMsg);
+      matchAuthorToCommitterDate(project, mergeCommit);
       return rw.parseCommit(inserter.insert(mergeCommit));
     }
     throw new MergeConflictException("merge conflict");
@@ -857,4 +858,14 @@ public class MergeUtil {
       throw new ResourceNotFoundException(e.getMessage());
     }
   }
+
+  private static void matchAuthorToCommitterDate(ProjectState project, CommitBuilder commit) {
+    if (project.isMatchAuthorToCommitterDate()) {
+      commit.setAuthor(
+          new PersonIdent(
+              commit.getAuthor(),
+              commit.getCommitter().getWhen(),
+              commit.getCommitter().getTimeZone()));
+    }
+  }
 }

gerrit-server/src/main/java/com/google/gerrit/server/git/ProjectConfig.java

@@ -88,6 +88,8 @@ public class ProjectConfig extends VersionedMetaData implements ValidationError.
 
   private static final String PROJECT = "project";
   private static final String KEY_DESCRIPTION = "description";
+  private static final String KEY_MATCH_AUTHOR_DATE_WITH_COMMITTER_DATE =
+      "matchAuthorToCommitterDate";
 
   public static final String ACCESS = "access";
   private static final String KEY_INHERIT_FROM = "inheritFrom";
@@ -532,6 +534,13 @@ public class ProjectConfig extends VersionedMetaData implements ValidationError.
 
     p.setSubmitType(getEnum(rc, SUBMIT, null, KEY_ACTION, DEFAULT_SUBMIT_ACTION));
     p.setUseContentMerge(getEnum(rc, SUBMIT, null, KEY_MERGE_CONTENT, InheritableBoolean.INHERIT));
+    p.setMatchAuthorToCommitterDate(
+        getEnum(
+            rc,
+            SUBMIT,
+            null,
+            KEY_MATCH_AUTHOR_DATE_WITH_COMMITTER_DATE,
+            InheritableBoolean.INHERIT));
     p.setState(getEnum(rc, PROJECT, null, KEY_STATE, DEFAULT_STATE_VALUE));
 
     p.setDefaultDashboard(rc.getString(DASHBOARD, null, KEY_DEFAULT));
@@ -1036,7 +1045,6 @@ public class ProjectConfig extends VersionedMetaData implements ValidationError.
       rc.unset(PROJECT, null, KEY_DESCRIPTION);
     }
     set(rc, ACCESS, null, KEY_INHERIT_FROM, p.getParentName());
-
     set(
         rc,
         RECEIVE,
@@ -1102,6 +1110,13 @@ public class ProjectConfig extends VersionedMetaData implements ValidationError.
 
     set(rc, SUBMIT, null, KEY_ACTION, p.getSubmitType(), DEFAULT_SUBMIT_ACTION);
     set(rc, SUBMIT, null, KEY_MERGE_CONTENT, p.getUseContentMerge(), InheritableBoolean.INHERIT);
+    set(
+        rc,
+        SUBMIT,
+        null,
+        KEY_MATCH_AUTHOR_DATE_WITH_COMMITTER_DATE,
+        p.getMatchAuthorToCommitterDate(),
+        InheritableBoolean.INHERIT);
 
     set(rc, PROJECT, null, KEY_STATE, p.getState(), DEFAULT_STATE_VALUE);
 

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/MergeOneOp.java

@@ -28,7 +28,8 @@ class MergeOneOp extends SubmitStrategyOp {
   @Override
   public void updateRepoImpl(RepoContext ctx) throws IntegrationException, IOException {
     PersonIdent caller =
-        ctx.getIdentifiedUser().newCommitterIdent(ctx.getWhen(), ctx.getTimeZone());
+        ctx.getIdentifiedUser()
+            .newCommitterIdent(args.serverIdent.getWhen(), args.serverIdent.getTimeZone());
     if (args.mergeTip.getCurrentTip() == null) {
       throw new IllegalStateException(
           "cannot merge commit "

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/RebaseSubmitStrategy.java

@@ -179,7 +179,8 @@ public class RebaseSubmitStrategy extends SubmitStrategy {
                 .setDetailedCommitMessage(rebaseAlways)
                 // Do not post message after inserting new patchset because there
                 // will be one about change being merged already.
-                .setPostMessage(false);
+                .setPostMessage(false)
+                .setMatchAuthorToCommitterDate(args.project.isMatchAuthorToCommitterDate());
         try {
           rebaseOp.updateRepo(ctx);
         } catch (MergeConflictException | NoSuchChangeException e) {