public void FetchWithoutConflict(string remote, string branchName)
{
// To get ssh to work with hg, we need to ensure ssh.exe exists in the path and the HOME environment variable is set.
// NOTE: Although hge.exe accepts the path to ssh.exe via a --ssh parameter, it cannot handle any whitespace
// This doesn't work for us since ssh.exe is located under Program Files in typical Kudu scenarios.
_hgExecutable.SetHomePath(_homePath);
string currentPath = System.Environment.GetEnvironmentVariable(PATH_KEY);
char sep = Path.PathSeparator;
currentPath = currentPath.TrimEnd(sep) + sep + Path.GetDirectoryName(PathUtilityFactory.Instance.ResolveSSHPath());
_hgExecutable.EnvironmentVariables[PATH_KEY] = currentPath;
ITracer tracer = _traceFactory.GetTracer();
bool retried = false;
// Whitespace in branch name is legal in Mercurial.
// We need double quotes around branchName.
string branchNameWithQuotes = "\"" + branchName + "\"";
fetch:
try
{
_hgExecutable.Execute(tracer, "pull {0} --branch {1} --noninteractive", remote, branchNameWithQuotes, PathUtilityFactory.Instance.ResolveSSHPath());
}
catch (CommandLineException exception)
{
string branchNotFoundMessage = String.Format(CultureInfo.InvariantCulture, "abort: unknown branch '{0}'!", branchName);
string recoverRequiredMessage = "abort: abandoned transaction found - run hg recover!";
string exceptionMessage = (exception.Message ?? String.Empty).TrimEnd();
if (exceptionMessage.StartsWith(branchNotFoundMessage, StringComparison.OrdinalIgnoreCase))
{
throw new BranchNotFoundException(branchNameWithQuotes, exception);
}
else if (!retried && exceptionMessage.IndexOf(recoverRequiredMessage, StringComparison.OrdinalIgnoreCase) != -1)
{
// Check if the previous fetch failed with a message to recover.
retried = true;
_hgExecutable.Execute(tracer, "recover");
goto fetch;
}
throw;
}
_hgExecutable.Execute(tracer, "update --clean {0}", branchNameWithQuotes);
}