Source Code for Module nukeBackEnd

 1  ''' 
 2  A class that allows for a dynamic allocation model for Nuke 
 3  ''' 
 4  #====================================== 
 5  #  $Revision: #5 $ 
 6  #  $Change: 15708 $ 
 7  #====================================== 
 8   
 9  import sys 
10  import qb.backend.pythonChildBackEnd 
11   
12   
13 -class NukeBackEnd(qb.backend.pythonChildBackEnd.PythonChildBackEnd): 
14      """ 
15      A backend for a jobtype that runs an instance of Nuke in a child process. 
16   
17      This will allow for the Nuke session to persist for the duration of the subjob. 
18      """ 
19   
20 -    def getSubprocessArgs(self, port): 
21          """ 
22          Get the arguments to start the child python process. 
23           
24          @param port: the port on which the PyCmdDispatcher's backchannel instance is listening, usually 
25          passed as a parameter to the child_bootstrapper.py script which starts up the pyCmdExecutor 
26          inside child process started by the PyCmdDispatcher 
27   
28          @type port: C{int} 
29           
30          @return: Return a tuple of a list of args to start the python interpreter, 
31          and a list of python commands to initialize the python working environment. 
32           
33          @rtype: C{tuple} C{([childArgs], [pyInitCmds])} 
34          """ 
35   
36          args = [] 
37          if sys.platform != 'win32': 
38              args.extend(['/bin/tcsh', '-c']) 
39   
40          nukeArgs = self.job['package'].get('nukeArgs', '') 
41          if not nukeArgs: 
42              nukeArgs = '' 
43   
44          pyCmdLine = '"%s" %s -t "%s" --port %s --kind %s' % (self.pyExecutable, nukeArgs, self.childBootstrapper, port, self.job['kind']) 
45       
46          args.append(pyCmdLine) 
47   
48          pyInitCmds = [ 
49              'import nuke', 
50              '''print "Nuke thread count: %s" % nuke.env['threads']''', 
51          ] 
52   
53          return args, pyInitCmds 
54