public NodeScriptRunner(
string workingDirectory,
string scriptName,
string arguments,
IDictionary <string, string> envVars,
string pkgManagerCommand,
DiagnosticSource diagnosticSource,
CancellationToken applicationStoppingToken)
{
if (string.IsNullOrEmpty(workingDirectory))
{
throw new ArgumentException("Cannot be null or empty.", nameof(workingDirectory));
}
if (string.IsNullOrEmpty(scriptName))
{
throw new ArgumentException("Cannot be null or empty.", nameof(scriptName));
}
if (string.IsNullOrEmpty(pkgManagerCommand))
{
throw new ArgumentException("Cannot be null or empty.", nameof(pkgManagerCommand));
}
var exeToRun = pkgManagerCommand;
var completeArguments = $"run {scriptName} -- {arguments ?? string.Empty}";
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
// On Windows, the node executable is a .cmd file, so it can't be executed
// directly (except with UseShellExecute=true, but that's no good, because
// it prevents capturing stdio). So we need to invoke it via "cmd /c".
exeToRun = "cmd";
completeArguments = $"/c {pkgManagerCommand} {completeArguments}";
}
var processStartInfo = new ProcessStartInfo(exeToRun)
{
Arguments = completeArguments,
UseShellExecute = false,
RedirectStandardInput = true,
RedirectStandardOutput = true,
RedirectStandardError = true,
WorkingDirectory = workingDirectory
};
if (envVars != null)
{
foreach (var keyValuePair in envVars)
{
processStartInfo.Environment[keyValuePair.Key] = keyValuePair.Value;
}
}
_npmProcess = LaunchNodeProcess(processStartInfo, pkgManagerCommand);
StdOut = new EventedStreamReader(_npmProcess.StandardOutput);
StdErr = new EventedStreamReader(_npmProcess.StandardError);
applicationStoppingToken.Register(((IDisposable)this).Dispose);
if (diagnosticSource.IsEnabled("Microsoft.AspNetCore.NodeServices.Npm.NpmStarted"))
{
diagnosticSource.Write(
"Microsoft.AspNetCore.NodeServices.Npm.NpmStarted",
new
{
processStartInfo = processStartInfo,
process = _npmProcess
});
}
}
public EventedStreamStringReader(EventedStreamReader eventedStreamReader)
{
_eventedStreamReader = eventedStreamReader
?? throw new ArgumentNullException(nameof(eventedStreamReader));
_eventedStreamReader.OnReceivedLine += OnReceivedLine;
}
