102 lines
3.5 KiB
C#
102 lines
3.5 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Diagnostics;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace FunctionalTests
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{
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internal static class ProcessManager
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{
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private static readonly TimeSpan Timeout = TimeSpan.FromMinutes(3);
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public static Task<ProcessResult> RunProcessAsync(ProcessStartInfo processStartInfo)
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{
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processStartInfo.UseShellExecute = false;
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processStartInfo.RedirectStandardError = true;
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processStartInfo.RedirectStandardOutput = true;
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var process = new Process()
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{
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StartInfo = processStartInfo,
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EnableRaisingEvents = true,
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};
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var output = new StringBuilder();
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var outputLock = new object();
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process.ErrorDataReceived += Process_ErrorDataReceived;
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process.OutputDataReceived += Process_OutputDataReceived;
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process.Start();
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process.BeginErrorReadLine();
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process.BeginOutputReadLine();
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var timeoutTask = Task.Delay(Timeout).ContinueWith((t) =>
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{
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// Don't timeout during debug sessions
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while (Debugger.IsAttached)
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{
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Thread.Sleep(TimeSpan.FromSeconds(1));
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}
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if (process.HasExited)
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{
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// This will happen on success, the 'real' task has already completed so this value will
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// never be visible.
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return (ProcessResult)default;
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}
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// This is a timeout.
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process.Kill();
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throw new TimeoutException($"command '${process.StartInfo.FileName} {process.StartInfo.Arguments}' timed out after {Timeout}.");
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});
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var waitTask = Task.Run(() =>
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{
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// We need to use two WaitForExit calls to ensure that all of the output/events are processed. Previously
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// this code used Process.Exited, which could result in us missing some output due to the ordering of
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// events.
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//
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// See the remarks here: https://msdn.microsoft.com/en-us/library/ty0d8k56(v=vs.110).aspx
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if (!process.WaitForExit(int.MaxValue))
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{
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// unreachable - the timeoutTask will kill the process before this happens.
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throw new TimeoutException();
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}
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process.WaitForExit();
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string outputString;
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lock (outputLock)
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{
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outputString = output.ToString();
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}
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return new ProcessResult(processStartInfo, process.ExitCode, outputString);
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});
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return Task.WhenAny<ProcessResult>(waitTask, timeoutTask).Unwrap();
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void Process_ErrorDataReceived(object sender, DataReceivedEventArgs e)
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{
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lock (outputLock)
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{
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output.AppendLine(e.Data);
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}
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}
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void Process_OutputDataReceived(object sender, DataReceivedEventArgs e)
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{
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lock (outputLock)
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{
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output.AppendLine(e.Data);
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}
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}
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}
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}
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}
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