Generic system config (#17962)

# Objective
Prevents duplicate implementation between IntoSystemConfigs and
IntoSystemSetConfigs using a generic, adds a NodeType trait for more
config flexibility (opening the door to implement
#14195?).

## Solution
Followed writeup by @ItsDoot:
https://hackmd.io/@doot/rJeefFHc1x

Removes IntoSystemConfigs and IntoSystemSetConfigs, instead using
IntoNodeConfigs with generics.

## Testing
Pending

---

## Showcase
N/A

## Migration Guide
SystemSetConfigs -> NodeConfigs<InternedSystemSet>
SystemConfigs -> NodeConfigs<ScheduleSystem>
IntoSystemSetConfigs -> IntoNodeConfigs<InternedSystemSet, M>
IntoSystemConfigs -> IntoNodeConfigs<ScheduleSystem, M>

---------

Co-authored-by: Christian Hughes <9044780+ItsDoot@users.noreply.github.com>
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>

Author: 3 people

crates/bevy_app/src/app.rs

@@ -14,8 +14,8 @@ use bevy_ecs::{
     event::{event_update_system, EventCursor},
     intern::Interned,
     prelude::*,
-    schedule::{ScheduleBuildSettings, ScheduleLabel},
-    system::{IntoObserverSystem, SystemId, SystemInput},
+    schedule::{InternedSystemSet, ScheduleBuildSettings, ScheduleLabel},
+    system::{IntoObserverSystem, ScheduleSystem, SystemId, SystemInput},
 };
 use bevy_platform_support::collections::HashMap;
 use core::{fmt::Debug, num::NonZero, panic::AssertUnwindSafe};
@@ -302,7 +302,7 @@ impl App {
     pub fn add_systems<M>(
         &mut self,
         schedule: impl ScheduleLabel,
-        systems: impl IntoSystemConfigs<M>,
+        systems: impl IntoScheduleConfigs<ScheduleSystem, M>,
     ) -> &mut Self {
         self.main_mut().add_systems(schedule, systems);
         self
@@ -330,10 +330,10 @@ impl App {
 
     /// Configures a collection of system sets in the provided schedule, adding any sets that do not exist.
     #[track_caller]
-    pub fn configure_sets(
+    pub fn configure_sets<M>(
         &mut self,
         schedule: impl ScheduleLabel,
-        sets: impl IntoSystemSetConfigs,
+        sets: impl IntoScheduleConfigs<InternedSystemSet, M>,
     ) -> &mut Self {
         self.main_mut().configure_sets(schedule, sets);
         self
@@ -1446,7 +1446,7 @@ mod tests {
         query::With,
         removal_detection::RemovedComponents,
         resource::Resource,
-        schedule::{IntoSystemConfigs, ScheduleLabel},
+        schedule::{IntoScheduleConfigs, ScheduleLabel},
         system::{Commands, Query},
         world::{FromWorld, World},
     };

crates/bevy_app/src/main_schedule.rs

@@ -3,7 +3,7 @@ use alloc::{vec, vec::Vec};
 use bevy_ecs::{
     resource::Resource,
     schedule::{
-        ExecutorKind, InternedScheduleLabel, IntoSystemSetConfigs, Schedule, ScheduleLabel,
+        ExecutorKind, InternedScheduleLabel, IntoScheduleConfigs, Schedule, ScheduleLabel,
         SystemSet,
     },
     system::Local,
@@ -316,7 +316,7 @@ impl Plugin for MainSchedulePlugin {
 
         #[cfg(feature = "bevy_debug_stepping")]
         {
-            use bevy_ecs::schedule::{IntoSystemConfigs, Stepping};
+            use bevy_ecs::schedule::{IntoScheduleConfigs, Stepping};
             app.add_systems(Main, Stepping::begin_frame.before(Main::run_main));
         }
     }

crates/bevy_app/src/sub_app.rs

@@ -4,8 +4,8 @@ use bevy_ecs::{
     error::{DefaultSystemErrorHandler, SystemErrorContext},
     event::EventRegistry,
     prelude::*,
-    schedule::{InternedScheduleLabel, ScheduleBuildSettings, ScheduleLabel},
-    system::{SystemId, SystemInput},
+    schedule::{InternedScheduleLabel, InternedSystemSet, ScheduleBuildSettings, ScheduleLabel},
+    system::{ScheduleSystem, SystemId, SystemInput},
 };
 use bevy_platform_support::collections::{HashMap, HashSet};
 use core::fmt::Debug;
@@ -212,7 +212,7 @@ impl SubApp {
     pub fn add_systems<M>(
         &mut self,
         schedule: impl ScheduleLabel,
-        systems: impl IntoSystemConfigs<M>,
+        systems: impl IntoScheduleConfigs<ScheduleSystem, M>,
     ) -> &mut Self {
         let mut schedules = self.world.resource_mut::<Schedules>();
         schedules.add_systems(schedule, systems);
@@ -234,10 +234,10 @@ impl SubApp {
 
     /// See [`App::configure_sets`].
     #[track_caller]
-    pub fn configure_sets(
+    pub fn configure_sets<M>(
         &mut self,
         schedule: impl ScheduleLabel,
-        sets: impl IntoSystemSetConfigs,
+        sets: impl IntoScheduleConfigs<InternedSystemSet, M>,
     ) -> &mut Self {
         let mut schedules = self.world.resource_mut::<Schedules>();
         schedules.configure_sets(schedule, sets);

crates/bevy_asset/src/asset_changed.rs

@@ -290,7 +290,7 @@ mod tests {
 
     use crate::{AssetApp, Assets};
     use bevy_app::{App, AppExit, PostUpdate, Startup, TaskPoolPlugin, Update};
-    use bevy_ecs::schedule::IntoSystemConfigs;
+    use bevy_ecs::schedule::IntoScheduleConfigs;
     use bevy_ecs::{
         component::Component,
         event::EventWriter,

crates/bevy_asset/src/lib.rs

@@ -220,7 +220,7 @@ use bevy_app::{App, Plugin, PostUpdate, PreUpdate};
 use bevy_ecs::prelude::Component;
 use bevy_ecs::{
     reflect::AppTypeRegistry,
-    schedule::{IntoSystemConfigs, IntoSystemSetConfigs, SystemSet},
+    schedule::{IntoScheduleConfigs, SystemSet},
     world::FromWorld,
 };
 use bevy_platform_support::collections::HashSet;

crates/bevy_core_pipeline/src/dof/mod.rs

@@ -23,7 +23,7 @@ use bevy_ecs::{
     query::{QueryItem, With},
     reflect::ReflectComponent,
     resource::Resource,
-    schedule::IntoSystemConfigs as _,
+    schedule::IntoScheduleConfigs as _,
     system::{lifetimeless::Read, Commands, Query, Res, ResMut},
     world::{FromWorld, World},
 };

crates/bevy_core_pipeline/src/experimental/mip_generation/mod.rs

@@ -16,7 +16,7 @@ use bevy_ecs::{
     prelude::{resource_exists, Without},
     query::{Or, QueryState, With},
     resource::Resource,
-    schedule::IntoSystemConfigs as _,
+    schedule::IntoScheduleConfigs as _,
     system::{lifetimeless::Read, Commands, Local, Query, Res, ResMut},
     world::{FromWorld, World},
 };

crates/bevy_core_pipeline/src/motion_blur/mod.rs

@@ -9,7 +9,7 @@ use crate::{
 use bevy_app::{App, Plugin};
 use bevy_asset::{load_internal_asset, weak_handle, Handle};
 use bevy_ecs::{
-    component::Component, query::With, reflect::ReflectComponent, schedule::IntoSystemConfigs,
+    component::Component, query::With, reflect::ReflectComponent, schedule::IntoScheduleConfigs,
 };
 use bevy_reflect::{std_traits::ReflectDefault, Reflect};
 use bevy_render::{

crates/bevy_core_pipeline/src/post_process/mod.rs

@@ -11,7 +11,7 @@ use bevy_ecs::{
     query::{QueryItem, With},
     reflect::ReflectComponent,
     resource::Resource,
-    schedule::IntoSystemConfigs as _,
+    schedule::IntoScheduleConfigs as _,
     system::{lifetimeless::Read, Commands, Query, Res, ResMut},
     world::{FromWorld, World},
 };

crates/bevy_core_pipeline/src/skybox/mod.rs

@@ -5,7 +5,7 @@ use bevy_ecs::{
     query::{QueryItem, With},
     reflect::ReflectComponent,
     resource::Resource,
-    schedule::IntoSystemConfigs,
+    schedule::IntoScheduleConfigs,
     system::{Commands, Query, Res, ResMut},
 };
 use bevy_image::{BevyDefault, Image};