public override RunningProcess ExecuteCommand(NodeCommand cmd)
{
var args = new List <string>();
args.Add("exec");
args.Add("-i");
foreach (var env in cmd.Env)
{
args.Add("-e");
args.Add(env.Key + "=" + env.Value);
}
args.Add(ContainerName);
args.Add("/bin/sh");
args.Add("-c");
args.Add($"{cmd.FileName} {string.Join(" ", cmd.Arguments)}");
return(ExecuteLocalCommand(new NodeCommand
{
FileName = "docker",
Arguments = args,
Output = cmd.Output ?? InternalOutput,
}));
}
protected RunningProcess ExecuteLocalCommand(NodeCommand cmd)
{
var result = new RunningProcess();
TaskCompletionSource <bool> startedTask = new TaskCompletionSource <bool>();
TaskCompletionSource startedOutput = new TaskCompletionSource();
result.CancellationTokenSource = new CancellationTokenSource();
result.CompletedTask = ExecuteLocalCommandInternal(cmd, startedTask, startedOutput, result.CancellationTokenSource.Token);
result.StartedTask = startedTask.Task;
result.StartedOutput = startedOutput.Task;
return(result);
}
public override RunningProcess ExecuteCommand(NodeCommand cmd)
{
var cmdLine = $"{cmd.FileName} {string.Join(" ", cmd.Arguments)}";
cmd.Output.LogDebug("SSH: " + cmdLine);
using var command = SshClient.CreateCommand(cmdLine);
// hacky: https://stackoverflow.com/questions/37059305/c-sharp-streamreader-readline-returning-null-before-end-of-stream
var result = command.BeginExecute();
var channelField = command.GetType().GetField("_channel", BindingFlags.Instance | BindingFlags.NonPublic);
var channel = channelField.GetValue(command);
var receivedEvent = channel.GetType().GetEvent("DataReceived", BindingFlags.Instance | BindingFlags.Public);
var extendedDataEvent = channel.GetType().GetEvent("ExtendedDataReceived", BindingFlags.Instance | BindingFlags.Public);
using var handler = new ReceivedHandler(cmd.Output);
using var handler2 = new ExtendedReceivedHandler(cmd.Output);
// add event handler here
receivedEvent.AddEventHandler(channel, Delegate.CreateDelegate(receivedEvent.EventHandlerType, handler, handler.GetType().GetMethod("OnReceive")));
extendedDataEvent.AddEventHandler(channel, Delegate.CreateDelegate(extendedDataEvent.EventHandlerType, handler2, handler2.GetType().GetMethod("OnReceive")));
result.AsyncWaitHandle.WaitOne();
var procResult = new ProcessResult
{
ExitCode = command.ExitStatus,
Completed = true,
};
return(new RunningProcess
{
StartedTask = Task.FromResult(true),
CompletedTask = Task.FromResult(procResult),
StartedOutput = Task.CompletedTask,
});
}
public override RunningProcess ExecuteCommand(NodeCommand cmd)
{
return(ExecuteLocalCommand(cmd));
}
public abstract RunningProcess ExecuteCommand(NodeCommand cmd);
private async Task <ProcessResult> ExecuteLocalCommandInternal(NodeCommand cmd, TaskCompletionSource <bool> startedTask, TaskCompletionSource startedOutput, CancellationToken cancellationToken)
{
var num = Interlocked.Increment(ref ExecCount);
Context.InternalOutput.LogInformation("LocalExec #" + num.ToString() + ":" + cmd.FileName + " " + string.Join(" ", cmd.Arguments));
var result = new ProcessResult();
var startInfo = new ProcessStartInfo
{
FileName = cmd.FileName,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardInput = true,
RedirectStandardError = true,
CreateNoWindow = true,
};
foreach (var arg in cmd.Arguments)
{
startInfo.ArgumentList.Add(arg);
}
var process = new Process()
{
StartInfo = startInfo,
};
var outputCloseEvent = new TaskCompletionSource <bool>();
process.OutputDataReceived += (s, e) =>
{
lock (startedOutput)
if (!startedOutput.Task.IsCompleted)
{
startedOutput.SetResult();
}
// The output stream has been closed i.e. the process has terminated
if (e.Data == null)
{
outputCloseEvent.SetResult(true);
}
else
{
cmd.Output.LogProcessStandartOutput(e.Data);
}
};
var errorCloseEvent = new TaskCompletionSource <bool>();
process.ErrorDataReceived += (s, e) =>
{
lock (startedOutput)
if (!startedOutput.Task.IsCompleted)
{
startedOutput.SetResult();
}
// The error stream has been closed i.e. the process has terminated
if (e.Data == null)
{
errorCloseEvent.SetResult(true);
}
else
{
cmd.Output.LogProcessErrorOutput(e.Data);
}
};
bool isStarted;
try
{
isStarted = process.Start();
}
catch
{
// Usually it occurs when an executable file is not found or is not executable
result.Completed = true;
result.ExitCode = -1;
isStarted = false;
}
if (isStarted)
{
// Reads the output stream first and then waits because deadlocks are possible
process.BeginOutputReadLine();
process.BeginErrorReadLine();
startedTask.SetResult(true);
// Creates task to wait for process exit using timeout
var waitForExit = WaitForExitAsync(process, cancellationToken);
// Create task to wait for process exit and closing all output streams
var processTask = Task.WhenAll(waitForExit, outputCloseEvent.Task, errorCloseEvent.Task);
// Waits process completion and then checks it was not completed by timeout
if (await Task.WhenAny(Task.Delay(CapTimeout(cmd.Timeout)), processTask) == processTask && !waitForExit.IsCanceled)
{
result.Completed = true;
result.ExitCode = process.ExitCode;
Context.InternalOutput.LogInformation("LocalExec #" + num.ToString() + ": ExitCode " + result.ExitCode);
}
else
{
try
{
// Kill hung process
process.Kill();
Context.InternalOutput.LogError("LocalExec #" + num.ToString() + ": Killed");
}
catch
{
}
}
}
else
{
startedTask.SetResult(false);
Context.InternalOutput.LogError("LocalExec #" + num.ToString() + ": Failed");
}
return(result);
}
