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# Apache License, Version 2.0
# ./blender.bin --background -noaudio --python tests/python/bl_blendfile_library_overrides.py -- --output-dir=/tmp/
import pathlib
import bpy
import sys
import os
import unittest
sys.path.append(os.path.dirname(os.path.realpath(__file__)))
from bl_blendfile_utils import TestHelper
class TestLibraryOverrides(TestHelper, unittest.TestCase):
MESH_LIBRARY_PARENT = "LibMeshParent"
OBJECT_LIBRARY_PARENT = "LibMeshParent"
MESH_LIBRARY_CHILD = "LibMeshChild"
OBJECT_LIBRARY_CHILD = "LibMeshChild"
MESH_LIBRARY_PERMISSIVE = "LibMeshPermissive"
OBJECT_LIBRARY_PERMISSIVE = "LibMeshPermissive"
def __init__(self, args):
self.args = args
output_dir = pathlib.Path(self.args.output_dir)
self.ensure_path(str(output_dir))
self.output_path = output_dir / "blendlib_overrides.blend"
self.test_output_path = output_dir / "blendlib_overrides_test.blend"
bpy.ops.wm.read_homefile(use_empty=True, use_factory_startup=True)
mesh = bpy.data.meshes.new(TestLibraryOverrides.MESH_LIBRARY_PARENT)
obj = bpy.data.objects.new(TestLibraryOverrides.OBJECT_LIBRARY_PARENT, object_data=mesh)
bpy.context.collection.objects.link(obj)
mesh_child = bpy.data.meshes.new(TestLibraryOverrides.MESH_LIBRARY_CHILD)
obj_child = bpy.data.objects.new(TestLibraryOverrides.OBJECT_LIBRARY_CHILD, object_data=mesh_child)
obj_child.parent = obj
bpy.context.collection.objects.link(obj_child)
mesh = bpy.data.meshes.new(TestLibraryOverrides.MESH_LIBRARY_PERMISSIVE)
obj = bpy.data.objects.new(TestLibraryOverrides.OBJECT_LIBRARY_PERMISSIVE, object_data=mesh)
bpy.context.collection.objects.link(obj)
obj.override_template_create()
prop = obj.override_library.properties.add(rna_path='scale')
prop.operations.add(operation='NOOP')
bpy.ops.wm.save_as_mainfile(filepath=str(self.output_path), check_existing=False, compress=False)
def __ensure_override_library_updated(self):
# During save the override_library is updated.
bpy.ops.wm.save_as_mainfile(filepath=str(self.test_output_path), check_existing=False, compress=False)
def test_link_and_override_property(self):
bpy.ops.wm.read_homefile(use_empty=True, use_factory_startup=True)
bpy.data.orphans_purge()
link_dir = self.output_path / "Object"
bpy.ops.wm.link(directory=str(link_dir), filename=TestLibraryOverrides.OBJECT_LIBRARY_PARENT)
obj = bpy.data.objects[TestLibraryOverrides.OBJECT_LIBRARY_PARENT]
self.assertIsNone(obj.override_library)
local_id = obj.override_create()
self.assertIsNotNone(local_id.override_library)
self.assertIsNone(local_id.data.override_library)
assert(len(local_id.override_library.properties) == 0)
local_id.location.y = 1.0
self.__ensure_override_library_updated()
assert(len(local_id.override_library.properties) == 1)
override_prop = local_id.override_library.properties[0]
assert(override_prop.rna_path == "location")
assert(len(override_prop.operations) == 1)
override_operation = override_prop.operations[0]
assert(override_operation.operation == 'REPLACE')
# Setting location.y overridded all elements in the location array. -1 is a wildcard.
assert(override_operation.subitem_local_index == -1)
def test_link_permissive(self):
"""
Linked assets with a permissive template.
- Checks if the NOOP is properly handled.
- Checks if the correct properties and operations are created/updated.
"""
bpy.ops.wm.read_homefile(use_empty=True, use_factory_startup=True)
bpy.data.orphans_purge()
link_dir = self.output_path / "Object"
bpy.ops.wm.link(directory=str(link_dir), filename=TestLibraryOverrides.OBJECT_LIBRARY_PERMISSIVE)
obj = bpy.data.objects[TestLibraryOverrides.OBJECT_LIBRARY_PERMISSIVE]
self.assertIsNotNone(obj.override_library)
local_id = obj.override_create()
self.assertIsNotNone(local_id.override_library)
self.assertIsNone(local_id.data.override_library)
assert(len(local_id.override_library.properties) == 1)
override_prop = local_id.override_library.properties[0]
assert(override_prop.rna_path == "scale")
assert(len(override_prop.operations) == 1)
override_operation = override_prop.operations[0]
assert(override_operation.operation == 'NOOP')
assert(override_operation.subitem_local_index == -1)
local_id.location.y = 1.0
local_id.scale.x = 0.5
# `scale.x` will apply, but will be reverted when the library overrides
# are updated. This is by design so python scripts can still alter the
# properties locally what is a typical usecase in productions.
assert(local_id.scale.x == 0.5)
assert(local_id.location.y == 1.0)
self.__ensure_override_library_updated()
assert(local_id.scale.x == 1.0)
assert(local_id.location.y == 1.0)
assert(len(local_id.override_library.properties) == 2)
override_prop = local_id.override_library.properties[0]
assert(override_prop.rna_path == "scale")
assert(len(override_prop.operations) == 1)
override_operation = override_prop.operations[0]
assert(override_operation.operation == 'NOOP')
assert(override_operation.subitem_local_index == -1)
override_prop = local_id.override_library.properties[1]
assert(override_prop.rna_path == "location")
assert(len(override_prop.operations) == 1)
override_operation = override_prop.operations[0]
assert(override_operation.operation == 'REPLACE')
assert (override_operation.subitem_local_index == -1)
class TestLibraryTemplate(TestHelper, unittest.TestCase):
MESH_LIBRARY_PERMISSIVE = "LibMeshPermissive"
OBJECT_LIBRARY_PERMISSIVE = "LibMeshPermissive"
def __init__(self, args):
pass
def test_permissive_template(self):
"""
Test setting up a permissive template.
"""
bpy.ops.wm.read_homefile(use_empty=True, use_factory_startup=True)
mesh = bpy.data.meshes.new(TestLibraryTemplate.MESH_LIBRARY_PERMISSIVE)
obj = bpy.data.objects.new(TestLibraryTemplate.OBJECT_LIBRARY_PERMISSIVE, object_data=mesh)
bpy.context.collection.objects.link(obj)
assert(obj.override_library is None)
obj.override_template_create()
assert(obj.override_library is not None)
assert(len(obj.override_library.properties) == 0)
prop = obj.override_library.properties.add(rna_path='scale')
assert(len(obj.override_library.properties) == 1)
assert(len(prop.operations) == 0)
operation = prop.operations.add(operation='NOOP')
assert(len(prop.operations) == 1)
assert(operation.operation == 'NOOP')
TESTS = (
TestLibraryOverrides,
TestLibraryTemplate,
)
def argparse_create():
import argparse
# When --help or no args are given, print this help
description = "Test library overrides of blend file."
parser = argparse.ArgumentParser(description=description)
parser.add_argument(
"--output-dir",
dest="output_dir",
default=".",
help="Where to output temp saved blendfiles",
required=False,
)
return parser
def main():
args = argparse_create().parse_args()
# Don't write thumbnails into the home directory.
bpy.context.preferences.filepaths.use_save_preview_images = False
bpy.context.preferences.experimental.use_override_templates = True
for Test in TESTS:
Test(args).run_all_tests()
if __name__ == '__main__':
import sys
sys.argv = [__file__] + \
(sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else [])
main()
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