Add production build pipeline (#46)

## Summary
- split development dynamic linking from production builds
- add headless processed-asset generation
- add a separate production CI cache and static Bevy/Rust linkage verification
- keep custom debug features enabled for production builds behind a feature gate

Reviewed-on: #46
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/bin/process-assets.rs

@@ -0,0 +1,31 @@
+use bevy::{
+    app::ScheduleRunnerPlugin,
+    asset::{AssetMode, AssetPlugin, processor::AssetProcessor, processor::ProcessorState},
+    prelude::*,
+    tasks::block_on,
+};
+use shinespark::AssetProcessingPlugin;
+use std::{process::ExitCode, time::Duration};
+
+fn main() -> ExitCode {
+    let mut app = App::new();
+    app.add_plugins(MinimalPlugins.set(ScheduleRunnerPlugin::run_loop(Duration::from_millis(50))))
+        .add_plugins(AssetPlugin {
+            mode: AssetMode::Processed,
+            use_asset_processor_override: Some(true),
+            ..default()
+        })
+        .add_plugins(AssetProcessingPlugin)
+        .add_systems(Update, finish_when_processed);
+
+    app.run();
+    ExitCode::SUCCESS
+}
+
+fn finish_when_processed(processor: Option<Res<AssetProcessor>>, mut exit: MessageWriter<AppExit>) {
+    if processor
+        .is_some_and(|processor| block_on(processor.get_state()) == ProcessorState::Finished)
+    {
+        exit.write(AppExit::Success);
+    }
+}

src/fighter/baked_animation/asset_baking.rs

@@ -151,7 +151,10 @@ type FighterBakeProcessor = LoadTransformAndSave<
 >;
 
 pub struct BakedAnimationPlugin;
-impl Plugin for BakedAnimationPlugin {
+
+pub struct BakedAnimationAssetProcessingPlugin;
+
+impl Plugin for BakedAnimationAssetProcessingPlugin {
     fn build(&self, app: &mut App) {
         app.init_asset::<BakedFighterAnimations>()
             .register_asset_loader(FighterBakeSourceLoader)
@@ -160,7 +163,13 @@ impl Plugin for BakedAnimationPlugin {
                 FighterBakeTransformer,
                 BakedFighterAnimationsSaver,
             ))
-            .set_default_asset_processor::<FighterBakeProcessor>("fighterbake")
+            .set_default_asset_processor::<FighterBakeProcessor>("fighterbake");
+    }
+}
+
+impl Plugin for BakedAnimationPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_plugins(BakedAnimationAssetProcessingPlugin)
             .add_systems(
                 bevy_ggrs::prelude::GgrsSchedule,
                 super::runtime::update_fighter_bone_matrices

src/fighter/baked_animation/mod.rs

@@ -4,7 +4,7 @@ mod asset_baking;
 mod runtime;
 mod visual_binding;
 
-pub use asset_baking::BakedAnimationPlugin;
+pub use asset_baking::{BakedAnimationAssetProcessingPlugin, BakedAnimationPlugin};
 pub use crate::math::fixed_transform::FixedMat4;
 pub use runtime::{
     BakedAnimationClip, BakedFighterAnimations, FighterBoneIndexMap, FighterBoneMatrices,

src/lib.rs

@@ -155,11 +155,26 @@ impl Plugin for GamePlugin {
     }
 }
 
+/// Registers only the custom asset processors used by CI and release builds.
+/// The processing binary adds this plugin without starting the game.
+pub struct AssetProcessingPlugin;
+
+impl Plugin for AssetProcessingPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_plugins((
+            scripting::importer::FighterScriptImportPlugin,
+            fighter::baked_animation::BakedAnimationAssetProcessingPlugin,
+        ));
+    }
+}
+
 fn wait_for_asset_processor(
     processor: Option<Res<AssetProcessor>>,
     mut next_state: ResMut<NextState<AppState>>,
 ) {
-    if processor.is_none_or(|processor| block_on(processor.get_state()) == ProcessorState::Finished)
+    if !cfg!(feature = "development")
+        || processor
+            .is_none_or(|processor| block_on(processor.get_state()) == ProcessorState::Finished)
     {
         next_state.set(AppState::LoadCommonAssets);
     }

src/main.rs

@@ -1,8 +1,11 @@
 use bevy::asset::AssetMode::Processed;
+#[cfg(feature = "debug_features")]
 use bevy::camera_controller::free_camera::FreeCameraPlugin;
 use bevy::image::{ImageAddressMode, ImagePlugin, ImageSamplerDescriptor};
 use bevy::prelude::*;
+#[cfg(feature = "debug_features")]
 use bevy_egui::EguiPlugin;
+#[cfg(feature = "debug_features")]
 use bevy_inspector_egui::quick::WorldInspectorPlugin;
 
 fn main() -> AppExit {
@@ -20,16 +23,22 @@ fn main() -> AppExit {
         })
         .set(AssetPlugin {
             mode: Processed,
+            use_asset_processor_override: Some(cfg!(feature = "development")),
             ..default()
         });
 
-    App::new()
-        .add_plugins(default_plugins)
+    let mut app = App::new();
+    app.add_plugins(default_plugins)
         .add_plugins(avian3d::prelude::PhysicsPlugins::default())
         .add_plugins(shinespark::GamePlugin)
-        .add_plugins(FreeCameraPlugin)
-        .add_plugins(EguiPlugin::default())
-        .add_plugins(WorldInspectorPlugin::default()) // adds default options and `InspectorEguiImpl`s
-        .insert_resource(Time::<Fixed>::from_hz(60.0))
-        .run()
+        .insert_resource(Time::<Fixed>::from_hz(60.0));
+
+    #[cfg(feature = "debug_features")]
+    app.add_plugins((
+        FreeCameraPlugin,
+        EguiPlugin::default(),
+        WorldInspectorPlugin::default(),
+    ));
+
+    app.run()
 }