/// <summary>
/// Determines how many commits the from branch is ahead and/or behind the toBranch.
/// </summary>
/// <param name="from">From branch.</param>
/// <param name="to">To branch.</param>
/// <returns>A tuple(ahead, behind)</returns>
public static AheadBehind BranchAheadOrBehind(string from, string to)
{
var comparison = new AheadBehind();
// Gets a list of commits which are in one branch but not the other on separate lines.
// if the commit is in the left branch but not the right the line start with "<", otherwise ">"
var status = RunGitCommand("rev-list --left-right " + from + "..." + to, silent: true).Output;
// Count the number of arrows.
var lines = status.Split(new[] { "\r", "\n" }, StringSplitOptions.RemoveEmptyEntries);
foreach (var line in lines)
{
if (line.StartsWith(">"))
{
// fromBranch is a commit behind the toBranch
comparison.Behind++;
}
else if (line.StartsWith("<"))
{
// fromBranch has a commit ahead of the toBranch
comparison.Ahead++;
}
}
return comparison;
}
/// <summary>
/// Updates the TFS status.
/// </summary>
/// <param name="aheadBehind">The ahead behind.</param>
public void UpdateTfsStatus(AheadBehind aheadBehind)
{
Action action = () =>
{
var text = string.Format("{0} ahead, {1} behind TFS", aheadBehind.Ahead, aheadBehind.Behind);
TfsStatusLabel.Content = text;
TfsStatusLabel.Foreground = aheadBehind.Behind == 0 ? System.Windows.Media.Brushes.DarkGreen : System.Windows.Media.Brushes.DarkRed;
};
this.Dispatcher.BeginInvoke(action, DispatcherPriority.ApplicationIdle);
}