What is the best way to pass pre-create attributes to publish context?

[mustafa_jafar]

TL;DR

• You can add attr defs in creator plugins. where you use get_pre_create_attr_defs and get_instance_attr_defs. attrs will be available for each instance of your creator plugin.
• You can add attr defs in publish plugins. where you use get_attribute_defs. there are two types, instance and context.
• instance plugin: attrs will be available for all instances of the specified families.
• context plugin: attrs will be available for the whole context.

Examples

• Add attrs to creators, see how get_pre_create_attr_defs and get_instance_attr_defs are used in this houdini creator plugin.
• Add attrs to a publish plugin, see this example collect_something.py

@almie

I was looking for a way to set an attribute on the whole publish context

This is achieved by implementing a publish context plugin.