private async Task <bool> DoMerge(string upstreamBranch, string targetBranch, string message)
{
var timestamps = (from timestampMessage in (await AppendProcess(cli.GetCommitTimestamps(cli.RemoteBranch(upstreamBranch), targetBranch))).Process.Output
where timestampMessage.Channel == OutputChannel.Out
select timestampMessage.Message).ToArray();
var timestamp = timestamps.Max();
var mergeExitCode = (await AppendProcess(cli.MergeRemote(upstreamBranch, message, commitDate: timestamp))).Process.ExitCode;
var isSuccessfulMerge = mergeExitCode == 0;
await CleanIndex();
return(isSuccessfulMerge);
}
