collect_file_dependencies

class CollectFileDependencies(pyblish.api.ContextPlugin):
    """Gather all files referenced in this scene."""

    label = "Collect File Dependencies"
    order = pyblish.api.CollectorOrder - 0.49
    hosts = ["blender"]
    families = ["render"]

    @classmethod
    def apply_settings(cls, project_settings):
        # Disable plug-in if not used for deadline submission anyway
        # Note: This setting has been removed in `ayon-deadline` with
        #   https://github.com/ynput/ayon-deadline/pull/49
        #   but the logic here is kept for compatibility with older releases.
        cls.enabled = (
            project_settings
            .get("deadline", {})
            .get("publish", {})
            .get("BlenderSubmitDeadline", {})
            .get("asset_dependencies", True)
        )

    def process(self, context):
        dependencies = set()

        # Add alembic files as dependencies
        for cache in bpy.data.cache_files:
            dependencies.add(
                Path(bpy.path.abspath(cache.filepath)).resolve().as_posix())

        # Add image files as dependencies
        for image in bpy.data.images:
            if image.filepath:
                dependencies.add(Path(
                    bpy.path.abspath(image.filepath)).resolve().as_posix())

        context.data["fileDependencies"] = list(dependencies)