Before we move on, let me throw you into the deep end and show you a full example.
Don't worry too much if it doesn't make sense just now, the rest of the examples are dedicated to explaining each feature in great detail.
The examples will be written primarily for Autodesk Maya, but should be easily readable and it's concepts applicable to any 3d content creation software. There is a slight simplification involved, for more clarity, but overall this represents a real-world implementation of a fully featured publishing pipeline with Pyblish.
The Deep End
The example uses the 2 available superclasses in Pyblish - ContextPlugin and InstancePlugin. The order in which these plug-ins are run is controlled by an integer attribute called order, with 4 default values.
Collection
Validation
Extraction
Integration
image
1. collect_rig.py
Gather information to validate and export.
import pyblish.api
from maya import cmds
class CollectRig(pyblish.api.ContextPlugin):
"""Discover and collect available rigs into the context"""
order = pyblish.api.CollectorOrder
def process(self, context):
for node in cmds.ls(sets=True):
if not node.endswith("_RIG"):
continue
name = node.rsplit("_", 1)[0]
instance = context.create_instance(name, family="rig")
# Collect associated nodes
members = cmds.sets(node, query=True)
cmds.select([node] + members, noExpand=True)
instance[:] = cmds.file(
constructionHistory=True,
exportSelected=True,
preview=True,
force=True)
2. validate_rig.py
Ensure the correctness of collected information.
import pyblish.api
class ValidateRigContents(pyblish.api.InstancePlugin):
"""Ensure rig has the appropriate object sets"""
order = pyblish.api.ValidatorOrder
families = ["rig"]
def process(self, instance):
assert "controls_SEL" in instance, "%s is missing a controls set" % instance
assert "pointcache_SEL" in instance, "%s is missing a pointcache set" % instance
3. extract_rig.py
Write to disk.
import os
import shutil
from datetime import datetime
import pyblish.api
from maya import cmds
class ExtractRig(pyblish.api.InstancePlugin):
"""Serialise valid rig"""
order = pyblish.api.ExtractorOrder
families = ["rig"]
hosts = ["maya"]
def process(self, instance):
context = instance.context
dirname = os.path.dirname(context.data["currentFile"])
name, family = instance.data["name"], instance.data["family"]
date = datetime.now().strftime("%Y%m%dT%H%M%SZ")
# Find a temporary directory with support for publishing multiple times.
tempdir = os.path.join(dirname, "temp", date, family, name)
tempfile = os.path.join(tempdir, name + ".ma")
self.log.info("Exporting %s to %s" % (instance, tempfile))
if not os.path.exists(tempdir):
os.makedirs(tempdir)
cmds.select(instance, noExpand=True) # `instance` a list
cmds.file(tempfile,
type="mayaAscii",
exportSelected=True,
constructionHistory=False,
force=True)
# Store reference for integration
instance.set_data("tempdir", tempdir)
4. integrate_rig.py
Integrate written information into the pipeline, as per convention.
import os
import shutil
import pyblish.api
class IntegrateRig(pyblish.api.InstancePlugin):
"""Copy files to an appropriate location where others may reach it"""
order = pyblish.api.IntegratorOrder
families = ["rig"]
def process(self, instance):
assert instance.data("tempdir"), "Can't find rig on disk, aborting.."
self.log.info("Computing output directory..")
context = instance.context
dirname = os.path.dirname(context.data("currentFile"))
root = os.path.join(dirname, "public")
if not os.path.exists(root):
os.makedirs(root)
version = "v%03d" % (len(os.listdir(root)) + 1)
src = instance.data("tempdir")
dst = os.path.join(root, version)
self.log.info("Copying %s to %s.." % (src, dst))
shutil.copytree(src, dst)
self.log.info("Copied successfully!")
That's a lot
I'm sure you have lots of questions, but don't worry. This is the part where we dig into exactly how we get to this point, and what all of this really means.
Test it out
It isn't necessary to run this on your own, but if you want to give it a try, here's what you do.
