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import string
import os
class failure_exception:
def __init__( self, rc ):
self.rc_ = rc
def __str__( self ):
return "rc: %d" % self.rc_
def system( commands ):
if os.path.exists( "tmp.cmd" ):
os.chmod( "tmp.cmd", 0777 )
os.unlink( "tmp.cmd" )
f = open( "tmp.cmd", "w" )
f.write( string.join( commands, "\n" ) )
f.close()
rc = os.system( "tmp.cmd" )
os.chmod( "tmp.cmd", 0777 )
os.unlink( "tmp.cmd" )
return rc
def checked_system( commands, valid_return_codes = [ 0 ] ):
rc = system( commands )
if rc not in [ 0 ] + valid_return_codes: raise failure_exception( rc )
return rc
class step_controller:
def __init__( self, start_step ):
self.current_step_ = None;
self.skip_to_step_ = start_step
def start_step( self, step_name, start_message ):
self.current_step_ = step_name
if self.is_skipping( step_name ):
print "[%s] Skipping." % step_name
return 0
else:
self.skip_to_step_ = ""
print "[%s] %s" % ( step_name, start_message )
return 1
def finish_step( self, step_name ):
print "[%s] Finished" % step_name
def is_skipping( self, step_name = None ):
if step_name is None: step_name = self.current_step_
return self.skip_to_step_ != "" and self.skip_to_step_ != step_name
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