Initial commit for adding Houdini TAB search support for OpenPype Creators

openpype/hosts/houdini/api/creator_node_shelves.py

@@ -0,0 +1,178 @@
+"""Library to register OpenPype Creators for Houdini TAB node search menu.
+
+This can be used to install custom houdini tools for the TAB search
+menu which will trigger a publish instance to be created interactively.
+
+The Creators are automatically registered on launch of Houdini through the
+Houdini integration's `host.install()` method.
+
+"""
+import contextlib
+import tempfile
+import logging
+import os
+
+from openpype.pipeline import registered_host
+from openpype.pipeline.create import CreateContext
+from openpype.resources import get_openpype_icon_filepath
+
+import hou
+
+log = logging.getLogger(__name__)
+
+CREATE_SCRIPT = """
+from openpype.hosts.houdini.api.creator_node_shelves import create_interactive
+create_interactive("{identifier}")
+"""
+
+
+def create_interactive(creator_identifier):
+    """Create a Creator using its identifier interactively.
+
+    This is used by the generated shelf tools as callback when a user selects
+    the creator from the node tab search menu.
+
+    Args:
+        creator_identifier (str): The creator identifier of the Creator plugin
+            to create.
+
+    Return:
+        list: The created instances.
+
+    """
+
+    # TODO Use Qt instead
+    result, variant = hou.ui.readInput('Set variant', initial_contents='Main')
+    if result == -1:
+        raise RuntimeError("User interrupted")
+    variant = variant.strip()
+    if not variant:
+        raise RuntimeError("Empty variant value entered.")
+
+    host = registered_host()
+    context = CreateContext(host)
+
+    before = context.instances_by_id.copy()
+
+    # Create the instance
+    context.create(
+        creator_identifier=creator_identifier,
+        variant=variant,
+        pre_create_data={"use_selection": True}
+    )
+
+    # For convenience we set the new node as current since that's much more
+    # familiar to the artist when creating a node interactively
+    # TODO Allow to disable auto-select in studio settings or user preferences
+    after = context.instances_by_id
+    new = set(after) - set(before)
+    if new:
+        # Select the new instance
+        for instance_id in new:
+            instance = after[instance_id]
+            node = hou.node(instance.get("instance_node"))
+            node.setCurrent(True)
+
+    return list(new)
+
+
+@contextlib.contextmanager
+def shelves_change_block():
+    """Write shelf changes at the end of the context."""
+    hou.shelves.beginChangeBlock()
+    try:
+        yield
+    finally:
+        hou.shelves.endChangeBlock()
+
+
+def install():
+    """Install the Creator plug-ins to show in Houdini's TAB node search menu.
+
+    This function can is re-entrant and can be called again to reinstall and
+    update the node definitions. For example during development it can be
+    useful to call it manually:
+        >>> from openpype.hosts.houdini.api.creator_node_shelves import install
+        >>> install()
+
+    Returns:
+        list: List of `hou.Tool` instances
+
+    """
+
+    host = registered_host()
+
+    # Store the filepath on the host
+    # TODO: Define a less hacky static shelf path for current houdini session
+    filepath_attr = "_creator_node_shelf_filepath"
+    filepath = getattr(host, filepath_attr, None)
+    if filepath is None:
+        f = tempfile.NamedTemporaryFile(prefix="houdini_creator_nodes_",
+                                        suffix=".shelf",
+                                        delete=False)
+        f.close()
+        filepath = f.name
+        setattr(host, filepath_attr, filepath)
+    elif os.path.exists(filepath):
+        # Remove any existing shelf file so that we can completey regenerate
+        # and update the tools file if creator identifiers change
+        os.remove(filepath)
+
+    icon = get_openpype_icon_filepath()
+
+    # Create context only to get creator plugins, so we don't reset and only
+    # populate what we need to retrieve the list of creator plugins
+    create_context = CreateContext(host, reset=False)
+    create_context.reset_current_context()
+    create_context._reset_creator_plugins()
+
+    log.debug("Writing OpenPype Creator nodes to shelf: {}".format(filepath))
+    tools = []
+    with shelves_change_block():
+        for identifier, creator in create_context.manual_creators.items():
+
+            # TODO: Allow the creator plug-in itself to override the categories
+            #       for where they are shown, by e.g. defining
+            #       `Creator.get_network_categories()`
+
+            key = "openpype_create.{}".format(identifier)
+            log.debug(f"Registering {key}")
+            script = CREATE_SCRIPT.format(identifier=identifier)
+            data = {
+                "script": script,
+                "language": hou.scriptLanguage.Python,
+                "icon": icon,
+                "help": "Create OpenPype publish instance for {}".format(
+                    creator.label
+                ),
+                "help_url": None,
+                "network_categories": [
+                    hou.ropNodeTypeCategory(),
+                    hou.sopNodeTypeCategory()
+                ],
+                "viewer_categories": [],
+                "cop_viewer_categories": [],
+                "network_op_type": None,
+                "viewer_op_type": None,
+                "locations": ["OpenPype"]
+            }
+
+            label = "Create {}".format(creator.label)
+            tool = hou.shelves.tool(key)
+            if tool:
+                tool.setData(**data)
+                tool.setLabel(label)
+            else:
+                tool = hou.shelves.newTool(
+                    file_path=filepath,
+                    name=key,
+                    label=label,
+                    **data
+                )
+
+            tools.append(tool)
+
+    # Ensure the shelf is reloaded
+    hou.shelves.loadFile(filepath)
+
+    return tools

openpype/hosts/houdini/api/pipeline.py

@@ -18,7 +18,7 @@ from openpype.pipeline import (
 )
 from openpype.pipeline.load import any_outdated_containers
 from openpype.hosts.houdini import HOUDINI_HOST_DIR
-from openpype.hosts.houdini.api import lib, shelves
+from openpype.hosts.houdini.api import lib, shelves, creator_node_shelves
 
 from openpype.lib import (
     register_event_callback,
@@ -83,6 +83,10 @@ class HoudiniHost(HostBase, IWorkfileHost, ILoadHost, IPublishHost):
         _set_context_settings()
         shelves.generate_shelves()
 
+        if not IS_HEADLESS:
+            import hdefereval # noqa, hdefereval is only available in ui mode
+            hdefereval.executeDeferred(creator_node_shelves.install)
+
     def has_unsaved_changes(self):
         return hou.hipFile.hasUnsavedChanges()