Process BuildProcess()
{
string pypath;
try {
pypath = PythonHelper.FindPreferredPython();
}
catch {
LoggingService.LogError("Cannot locate python executable. Disabling python parsing.");
return(null);
}
var process = new Process();
process.StartInfo.FileName = pypath;
process.StartInfo.EnvironmentVariables ["WATCH_PID"] = Process.GetCurrentProcess().Id.ToString();
process.StartInfo.Arguments = "-u -";
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;
var started = false;
process.OutputDataReceived += delegate(object o, DataReceivedEventArgs e) {
if (!started)
{
if (e.Data.Trim().StartsWith("Listening on port "))
{
Monitor.Enter(m_syncRoot);
m_Port = Int32.Parse(e.Data.Substring(18).Trim());
started = true;
m_ProcessSuccess = true;
Monitor.Pulse(m_syncRoot);
Monitor.Exit(m_syncRoot);
Process oldProcess = null;
// Cycle to the new process
do
{
oldProcess = m_Process;
} while (Interlocked.CompareExchange <Process> (ref m_Process, process, oldProcess) != oldProcess);
Interlocked.Exchange(ref m_sinceCycle, 0);
// kill old process after 5 seconds
if (oldProcess != null)
{
GLib.Timeout.Add(5000, delegate {
oldProcess.Kill();
return(false);
});
}
}
}
};
return(process);
}
