7cb97852a5
# Objective
```rust
// Currently:
builder.add_after::<FooPlugin, _>(BarPlugin);
// After this PR:
builder.add_after::<FooPlugin>(BarPlugin);
```
This removes some weirdness and better parallels the rest of the
`PluginGroupBuilder` API.
## Solution
Define a helper method `type_id_of_val` to use in `.add_before` and
`.add_after` instead of `TypeId::of::<T>` (which requires the plugin
type to be nameable, preventing `impl Plugin` from being used).
## Testing
Ran `cargo run -p ci lints` successfully.
## Migration Guide
Removed second generic from `PluginGroupBuilder` methods: `add_before`
and `add_after`.
```rust
// Before:
DefaultPlugins
.build()
.add_before::<WindowPlugin, _>(FooPlugin)
.add_after::<WindowPlugin, _>(BarPlugin)
// After:
DefaultPlugins
.build()
.add_before::<WindowPlugin>(FooPlugin)
.add_after::<WindowPlugin>(BarPlugin)
```
---------
Co-authored-by: BD103 <59022059+BD103@users.noreply.github.com>
60 lines
1.6 KiB
Rust
60 lines
1.6 KiB
Rust
//! Demonstrates the creation and registration of a custom plugin group.
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//! [`PluginGroup`]s are a way to group sets of plugins that should be registered together.
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use bevy::{app::PluginGroupBuilder, prelude::*};
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fn main() {
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App::new()
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.add_plugins((
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// Two PluginGroups that are included with bevy are DefaultPlugins and MinimalPlugins
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DefaultPlugins,
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// Adding a plugin group adds all plugins in the group by default
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HelloWorldPlugins,
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))
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// You can also modify a PluginGroup (such as disabling plugins) like this:
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// .add_plugins(
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// HelloWorldPlugins
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// .build()
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// .disable::<PrintWorldPlugin>()
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// .add_before::<PrintHelloPlugin>(
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// bevy::diagnostic::LogDiagnosticsPlugin::default(),
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// ),
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// )
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.run();
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}
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/// A group of plugins that produce the "hello world" behavior
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pub struct HelloWorldPlugins;
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impl PluginGroup for HelloWorldPlugins {
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fn build(self) -> PluginGroupBuilder {
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PluginGroupBuilder::start::<Self>()
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.add(PrintHelloPlugin)
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.add(PrintWorldPlugin)
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}
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}
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struct PrintHelloPlugin;
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impl Plugin for PrintHelloPlugin {
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fn build(&self, app: &mut App) {
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app.add_systems(Update, print_hello_system);
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}
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}
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fn print_hello_system() {
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info!("hello");
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}
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struct PrintWorldPlugin;
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impl Plugin for PrintWorldPlugin {
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fn build(&self, app: &mut App) {
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app.add_systems(Update, print_world_system);
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}
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}
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fn print_world_system() {
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info!("world");
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}
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