static async Task <Possible <List <string> > > launchExternalProcessAndParseOutputAsync(Process process)
{
var result = new List <string>();
using (var pooledList = Pools.GetStringList())
{
var stdErrContent = pooledList.Instance;
using (var processExecutor = new AsyncProcessExecutor(
process,
s_externalProcessTimeout,
outputBuilder: line => { if (line != null)
{
result.Add(line);
}
},
errorBuilder: line => { if (line != null)
{
stdErrContent.Add(line);
}
}))
{
processExecutor.Start();
await processExecutor.WaitForExitAsync();
await processExecutor.WaitForStdOutAndStdErrAsync();
if (processExecutor.Process.ExitCode != 0)
{
var stdOut = $"{Environment.NewLine}{string.Join(Environment.NewLine, result)}";
var stdErr = $"{Environment.NewLine}{string.Join(Environment.NewLine, stdErrContent)}";
return(new Failure <string>($"{describeProcess(process)} Process failed with an exit code {processExecutor.Process.ExitCode}{stdOut}{stdErr}"));
}
if (result.Count == 0)
{
return(new Failure <string>($"{describeProcess(process)} Parser exited cleanly, but no output was written."));
}
if (!int.TryParse(result[0], out var expectedCount))
{
var stdOut = $"{Environment.NewLine}{string.Join(Environment.NewLine, result)}";
return(new Failure <string>($"{describeProcess(process)} Failed to parse tool output: {stdOut}"));
}
if (expectedCount != result.Count - 1)
{
var stdOut = $"{Environment.NewLine}{string.Join(Environment.NewLine, result)}";
return(new Failure <string>($"{describeProcess(process)} Output line count does not match the expected count: {stdOut}"));
}
result.RemoveAt(0);
return(result);
}
}
}
private async Task InitVmAsync()
{
// (1) Create and serialize 'StartBuild' request.
string startBuildRequestPath = Path.GetTempFileName();
using (var password = LowPrivilegeAccountUtils.GetLowPrivilegeBuildPassword())
{
//This will be temporary, will fix the problem exposing the password
var startBuildRequest = new StartBuildRequest
{
HostLowPrivilegeUsername = LowPrivilegeAccountUtils.GetLowPrivilegeBuildAccount(),
HostLowPrivilegePassword = LowPrivilegeAccountUtils.GetUnsecuredString(password)
};
VmSerializer.SerializeToFile(startBuildRequestPath, startBuildRequest);
}
// (2) Create a process to execute VmCommandProxy.
string arguments = $"{VmCommand.StartBuild} /{VmCommand.Param.InputJsonFile}:\"{startBuildRequestPath}\"";
var process = CreateVmCommandProxyProcess(arguments, Path.GetDirectoryName(startBuildRequestPath));
var stdOutForStartBuild = new StringBuilder();
var stdErrForStartBuild = new StringBuilder();
// (3) Run VmCommandProxy to start build.
using (var executor = new AsyncProcessExecutor(
process,
TimeSpan.FromMilliseconds(-1),
line => { if (line != null)
{
stdOutForStartBuild.AppendLine(line);
}
},
line => { if (line != null)
{
stdErrForStartBuild.AppendLine(line);
}
}))
{
executor.Start();
await executor.WaitForExitAsync();
await executor.WaitForStdOutAndStdErrAsync();
if (executor.Process.ExitCode != 0)
{
string stdOut = $"{Environment.NewLine}StdOut:{Environment.NewLine}{stdOutForStartBuild.ToString()}";
string stdErr = $"{Environment.NewLine}StdErr:{Environment.NewLine}{stdErrForStartBuild.ToString()}";
throw new BuildXLException($"Failed to init VM '{VmCommandProxy} {arguments}', with exit code {executor.Process.ExitCode}{stdOut}{stdErr}");
}
}
}
/// <summary>
/// Executes a Process
/// </summary>
/// <param name="exePath">Path to exe file</param>
/// <param name="args">Args to be passed to exe</param>
/// <param name="tempDir">Working directory for exe</param>
/// <returns>(<see cref="Process.ExitCode"/> == 0 AND !timeOut, StdErr, StdOut)</returns>
private async static Task <Possible <bool> > TryExecuteProcessAsync(string exePath, string args, string tempDir)
{
var process = new Process
{
StartInfo = new ProcessStartInfo(exePath, args)
{
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardError = true,
RedirectStandardOutput = true,
WorkingDirectory = tempDir
},
EnableRaisingEvents = true
};
StringBuilder stdOutBuilder = new StringBuilder();
StringBuilder stdErrBuilder = new StringBuilder();
using (var executor = new AsyncProcessExecutor(
process,
TimeSpan.FromMinutes(ExecutableMaxRuntimeInMinute),
line => { if (line != null)
{
stdOutBuilder.AppendLine(line);
}
},
line => { if (line != null)
{
stdErrBuilder.AppendLine(line);
}
}))
{
executor.Start();
await executor.WaitForExitAsync();
await executor.WaitForStdOutAndStdErrAsync();
if (executor.Process.ExitCode == 0 && !executor.TimedOut)
{
return(true);
}
string errorReturn = $"StdErr: { stdErrBuilder }, StdOut: { stdOutBuilder }";
return(new Failure <string>(errorReturn));
}
}
private async Task InitVmAsync()
{
// (1) Create a process to execute VmCommandProxy.
string arguments = $"{VmCommands.InitializeVm}";
var process = CreateVmCommandProxyProcess(arguments, Path.GetDirectoryName(Path.GetTempFileName()));
m_logStartInit?.Invoke($"{VmCommandProxy} {arguments}");
var stdOutForStartBuild = new StringBuilder();
var stdErrForStartBuild = new StringBuilder();
string provenance = $"[{nameof(VmInitializer)}]";
// (2) Run VmCommandProxy to start build.
using (var executor = new AsyncProcessExecutor(
process,
TimeSpan.FromMinutes(InitVmTimeoutInMinute),
line => { if (line != null)
{
stdOutForStartBuild.AppendLine(line);
}
},
line => { if (line != null)
{
stdErrForStartBuild.AppendLine(line);
}
},
provenance: provenance,
logger: message => m_logInitExecution?.Invoke(message)))
{
executor.Start();
await executor.WaitForExitAsync();
await executor.WaitForStdOutAndStdErrAsync();
string stdOut = $"{Environment.NewLine}StdOut:{Environment.NewLine}{stdOutForStartBuild.ToString()}";
string stdErr = $"{Environment.NewLine}StdErr:{Environment.NewLine}{stdErrForStartBuild.ToString()}";
if (executor.Process.ExitCode != 0)
{
throw new BuildXLException($"Failed to init VM '{VmCommandProxy} {arguments}', with exit code {executor.Process.ExitCode}{stdOut}{stdErr}");
}
m_logEndInit?.Invoke($"Exit code {executor.Process.ExitCode}{stdOut}{stdErr}");
}
}