44ad3bf62b
# Objective `bevy_ecs`'s `system` module is something of a grab bag, and *very* large. This is particularly true for the `system_param` module, which is more than 2k lines long! While it could be defensible to put `Res` and `ResMut` there (lol no they're in change_detection.rs, obviously), it doesn't make any sense to put the `Resource` trait there. This is confusing to navigate (and painful to work on and review). ## Solution - Create a root level `bevy_ecs/resource.rs` module to mirror `bevy_ecs/component.rs` - move the `Resource` trait to that module - move the `Resource` derive macro to that module as well (Rust really likes when you pun on the names of the derive macro and trait and put them in the same path) - fix all of the imports ## Notes to reviewers - We could probably move more stuff into here, but I wanted to keep this PR as small as possible given the absurd level of import changes. - This PR is ground work for my upcoming attempts to store resource data on components (resources-as-entities). Splitting this code out will make the work and review a bit easier, and is the sort of overdue refactor that's good to do as part of more meaningful work. ## Testing cargo build works! ## Migration Guide `bevy_ecs::system::Resource` has been moved to `bevy_ecs::resource::Resource`. |
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