def StartRevitProcess(revitVersion, initEnvironmentVariables):
revitExecutableFilePath = RevitVersion.GetRevitExecutableFilePath(revitVersion)
psi = ProcessStartInfo(revitExecutableFilePath)
psi.UseShellExecute = False
psi.RedirectStandardError = True
psi.RedirectStandardOutput = True
psi.WorkingDirectory = RevitVersion.GetRevitExecutableFolderPath(revitVersion)
initEnvironmentVariables(psi.EnvironmentVariables)
revitProcess = Process.Start(psi)
return revitProcess
def StartCmdProcess(commandLine):
# NOTE: do not call Process.WaitForExit() until redirected streams have been entirely read from / closed.
# doing so can lead to a deadlock when the child process is waiting on being able to write to output / error
# stream and the parent process is waiting for the child to exit! See Microsoft's documentation for more info.
# NOTE: if redirecting both output and error streams, one should be read asynchronously to avoid a deadlock where
# the child process is waiting to write to one of the streams and the parent is waiting for data from the other
# stream. See Microsoft's documentation for more info.
psi = ProcessStartInfo('cmd.exe', '/U /S /C " ' + commandLine + ' "')
psi.UseShellExecute = False
psi.CreateNoWindow = True
psi.RedirectStandardInput = False
psi.RedirectStandardError = False # See notes above if enabling this alongside redirect output stream.
psi.RedirectStandardOutput = True
psi.StandardOutputEncoding = Encoding.Unicode
p = Process.Start(psi)
return p