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//
// ProcessUtils.cs
//
// Author:
// Jérémie Laval <jeremie.laval@xamarin.com>
//
// Copyright (c) 2012 Xamarin, Inc.
using System;
using System.IO;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
namespace macdoc
{
public static class ProcessUtils
{
public static Task<int> StartProcess (ProcessStartInfo psi, TextWriter stdout, TextWriter stderr, CancellationToken cancellationToken)
{
var tcs = new TaskCompletionSource<int> ();
if (cancellationToken.CanBeCanceled && cancellationToken.IsCancellationRequested) {
tcs.SetCanceled ();
return tcs.Task;
}
psi.UseShellExecute = false;
if (stdout != null) {
psi.RedirectStandardOutput = true;
}
if (stderr != null) {
psi.RedirectStandardError = true;
}
var p = Process.Start (psi);
if (cancellationToken.CanBeCanceled)
cancellationToken.Register (() => {
try {
if (!p.HasExited) {
p.Kill ();
}
} catch (InvalidOperationException ex) {
if (ex.Message.IndexOf ("already exited") < 0)
throw;
}
});
p.EnableRaisingEvents = true;
if (psi.RedirectStandardOutput) {
bool stdOutInitialized = false;
p.OutputDataReceived += (sender, e) => {
try {
if (stdOutInitialized)
stdout.WriteLine ();
stdout.Write (e.Data);
stdOutInitialized = true;
} catch (Exception ex) {
tcs.SetException (ex);
}
};
p.BeginOutputReadLine ();
}
if (psi.RedirectStandardError) {
bool stdErrInitialized = false;
p.ErrorDataReceived += (sender, e) => {
try {
if (stdErrInitialized)
stderr.WriteLine ();
stderr.Write (e.Data);
stdErrInitialized = true;
} catch (Exception ex) {
tcs.SetException (ex);
}
};
p.BeginErrorReadLine ();
}
p.Exited += (sender, e) => tcs.SetResult (p.ExitCode);
return tcs.Task;
}
public static void StartRelaunchProcess ()
{
}
}
}
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