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__gaffer.py
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__gaffer.py
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##########################################################################
#
# Copyright (c) 2011, John Haddon. All rights reserved.
# Copyright (c) 2011-2012, Image Engine Design Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above
# copyright notice, this list of conditions and the following
# disclaimer.
#
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided with
# the distribution.
#
# * Neither the name of John Haddon nor the names of
# any other contributors to this software may be used to endorse or
# promote products derived from this software without specific prior
# written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
##########################################################################
# Note: This file is generally considered private. Those wishing to launch
# gaffer should use the gaffer wrapper script (also in this directory)
# as it ensures the correct process environment is set up prior to launch.
import os
import sys
import signal
import warnings
# Get rid of the annoying signal handler which turns Ctrl-C into a KeyboardInterrupt exception
signal.signal( signal.SIGINT, signal.SIG_DFL )
# Reenable deprecation warnings - Python2.7 turns them off by default so otherwise we'd never get
# to catch all the naughty deprecated things we do.
warnings.simplefilter( "default", DeprecationWarning )
import IECore
# Increase the soft limit for file handles as high as we can - we need everything we can get for
# opening models, textures etc.
if os.name != "nt" :
import resource
softFileLimit, hardFileLimit = resource.getrlimit( resource.RLIMIT_NOFILE )
if softFileLimit < hardFileLimit :
resource.setrlimit( resource.RLIMIT_NOFILE, ( hardFileLimit, hardFileLimit ) )
IECore.msg( IECore.Msg.Level.Info, "Gaffer", "Increased file handle limit to {}".format( hardFileLimit ) )
from Gaffer._Gaffer import _nameProcess
_nameProcess()
helpText = """Usage :
gaffer -help Print this message
gaffer -help appName Print help specific to named application
gaffer appName [flags] Run named application with specified flags
gaffer fileName.gfr [flags] Run gui application with specified script and flags
gaffer [flags] Run gui application with specified flags
"""
appLoader = IECore.ClassLoader.defaultLoader( "GAFFER_APP_PATHS" )
applicationText = "Installed applications :\n\n" + "\n".join( " " + x for x in appLoader.classNames() ) + "\n"
def loadApp( appName ) :
if appName in appLoader.classNames() :
return appLoader.load( appName )()
else :
sys.stderr.write( "ERROR : Application \"%s\" not installed on GAFFER_APP_PATHS\n" % appName )
sys.stderr.write( "\n" + applicationText )
sys.exit( 1 )
def checkCleanExit() :
# Get the Gaffer and GafferUI modules, but only if the app actually
# imported them. We don't want to force their importation because it's
# just a waste of time if they weren't used.
Gaffer = sys.modules.get( "Gaffer" )
GafferUI = sys.modules.get( "GafferUI" )
if Gaffer is None and GafferUI is None :
return
# Clean up any garbage left behind by Cortex's wrapper mechanism - because
# the Gaffer.Application itself is derived from IECore.Parameterised, which
# as far as I can tell is wrapped unnecessarily, we must call this to allow
# the application to be deleted at all. Note that we're deliberately not also
# calling gc.collect() - our intention here isn't to clean up on shutdown, but
# to highlight problems caused by things not cleaning up after themselves during
# execution. We aim to eliminate all circular references from our code, to avoid
# garbage collection overhead and to avoid problems caused by referencing Qt widgets
# which were long since destroyed in C++.
## \todo Reevaluate the need for this call after Cortex 9 development.
IECore.RefCounted.collectGarbage()
# Importing here rather than at the top of the file prevents false
# positives being reported in gc.get_objects() below. I have no idea why,
# but if not imported here, get_objects() will report objects which have
# nothing referring to them and which should be dead, even with an
# explicit call to gc.collect() beforehand.
import gc
# Check for things that shouldn't exist at shutdown, and
# warn of anything we find.
scriptNodes = []
widgets = []
for o in gc.get_objects() :
if Gaffer is not None and isinstance( o, Gaffer.ScriptNode ) :
scriptNodes.append( o )
elif GafferUI is not None and isinstance( o, GafferUI.Widget ) :
widgets.append( o )
if scriptNodes :
IECore.msg(
IECore.Msg.Level.Debug,
"Gaffer shutdown", "%d remaining ScriptNode%s detected. Debugging with objgraph is recommended." % (
len( scriptNodes ),
"s" if len( scriptNodes ) > 1 else "",
)
)
if widgets :
count = {}
for widget in widgets :
widgetType = widget.__class__.__name__
count[widgetType] = count.get( widgetType, 0 ) + 1
summaries = [ "%s (%d)" % ( k, count[k] ) for k in sorted( count.keys() ) ]
IECore.msg(
IECore.Msg.Level.Debug,
"Gaffer shutdown", "%d remaining Widget%s detected : \n\n%s\n\nDebugging with objgraph is recommended." % (
len( widgets ),
"s" if len( widgets ) > 1 else "",
"\t" + "\n\t".join( summaries )
)
)
args = sys.argv[1:]
if args and args[0] in ( "-help", "-h", "--help", "-H" ) :
if len( args ) > 1 :
app = loadApp( args[1] )
app["help"].setTypedValue( True )
app.run()
sys.exit( 0 )
else :
sys.stdout.write( helpText )
sys.stdout.write( "\n" + applicationText )
sys.exit( 0 )
else :
appName = "gui"
appArgs = args
if len( args ) :
if not args[0].startswith( "-" ) and not args[0].endswith( ".gfr" ) :
appName = args[0]
appArgs = args[1:]
app = loadApp( appName )
IECore.ParameterParser().parse( appArgs, app.parameters() )
result = app.run()
del app
checkCleanExit()
sys.exit( result )