internal object CallPowerShell(PsRequest request, params object[] args)
{
// the lock ensures that we're not re-entrant into the same powershell runspace
lock (_lock) {
if (!_reentrancyLock.WaitOne(0))
{
// this lock is set to false, meaning we're still in a call **ON THIS THREAD**
// this is bad karma -- powershell won't let us call into the runspace again
// we're going to throw an error here because this indicates that the currently
// running powershell call is calling back into OneGet, and it has called back
// into this provider. That's just bad bad bad.
throw new Exception("Re-entrancy Violation in powershell module");
}
try {
// otherwise, this is the first time we've been here during this call.
_reentrancyLock.Reset();
_powershell["request"] = request;
DynamicPowershellResult result = null;
// request.Debug("INVOKING PowerShell Fn {0} in {1}", request.CommandInfo.Name, _module.Name);
// make sure we don't pass the request to the function.
result = _powershell.NewTryInvokeMemberEx(request.CommandInfo.Name, new string[0], args);
// instead, loop thru results and get
if (result == null)
{
// failure!
throw new Exception(Messages.PowershellScriptFunctionFailed.format(_module.Name, request.CommandInfo.Name));
}
object finalValue = null;
foreach (var value in result)
{
if (result.ContainsErrors)
{
ReportErrors(request, result.Errors);
return(null);
}
var y = value as Yieldable;
if (y != null)
{
y.YieldResult(request);
}
else
{
finalValue = value;
}
}
if (result.ContainsErrors)
{
ReportErrors(request, result.Errors);
return(null);
}
return(finalValue);
} catch (Exception e) {
e.Dump();
} finally {
_powershell.WaitForAvailable();
_powershell["request"] = null;
// it's ok if someone else calls into this module now.
_reentrancyLock.Set();
}
return(null);
}
}
