Preserve insertion order by using `IndexMap`

Cargo.lock

@@ -643,6 +643,7 @@ version = "0.1.0"
 dependencies = [
  "bevy",
  "derive-where",
+ "indexmap",
  "lightyear",
  "ron 0.12.0",
  "serde",
@@ -1412,7 +1413,7 @@ dependencies = [
  "foldhash 0.2.0",
  "futures-channel",
  "getrandom 0.3.4",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "js-sys",
  "portable-atomic",
  "portable-atomic-util",
@@ -3554,13 +3555,14 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.16.0"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5419bdc4f6a9207fbeba6d11b604d481addf78ecd10c11ad51e76c2f6482748d"
+checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 dependencies = [
  "equivalent",
  "foldhash 0.2.0",
  "serde",
+ "serde_core",
 ]
 
 [[package]]
@@ -3772,12 +3774,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.12.0"
+version = "2.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6717a8d2a5a929a1a2eb43a12812498ed141a0bcfb7e8f7844fbdbe4303bba9f"
+checksum = "0ad4bb2b565bca0645f4d68c5c9af97fba094e9791da685bf83cb5f3ce74acf2"
 dependencies = [
  "equivalent",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "serde",
  "serde_core",
 ]
@@ -4570,7 +4572,7 @@ dependencies = [
  "bevy_platform",
  "bevy_reflect",
  "bevy_utils",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "paste",
  "seahash",
  "tracing",
@@ -5519,7 +5521,7 @@ dependencies = [
  "either",
  "ena",
  "foldhash 0.2.0",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "log",
  "nalgebra",
  "num-derive",
@@ -5545,7 +5547,7 @@ dependencies = [
  "either",
  "ena",
  "foldhash 0.2.0",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "log",
  "nalgebra",
  "num-derive",

Cargo.toml

@@ -16,6 +16,7 @@ bevy = { version = "0.17.2", features = [ "serialize" ] }
 
 derive-where = { version = "1.6.0", features = [ "serde" ] }
 
+indexmap = "2.12.1"
 ron = "0.12.0"
 serde = "1.0.228"
 thiserror = "2.0.17"

common/Cargo.toml

@@ -9,6 +9,7 @@ lightyear.workspace = true
 
 derive-where.workspace = true
 
+indexmap.workspace = true
 ron.workspace = true
 serde.workspace = true
 thiserror.workspace = true

common/src/assets/manifest.rs

@@ -58,7 +58,9 @@ impl<T: ManifestEntry> AssetLoader for ManifestAssetLoader<T> {
         for id in raw {
             let id = Identifier::<T::Marker>::new(id)?;
             let handle = load_context.load(format!("blocks/{id}.ron"));
-            map.try_insert(id, handle).map_err(|_| "duplicate entry")?;
+            if map.insert(id, handle).is_some() {
+                return Err("duplicate entry".into());
+            }
         }
         Ok(ManifestAsset { map })
     }

common/src/identifier.rs

@@ -5,13 +5,14 @@ use std::path::Path;
 use bevy::prelude::*;
 
 use bevy::asset::{UntypedAssetId, VisitAssetDependencies};
-use bevy::platform::collections::HashMap;
 use derive_where::derive_where;
+use indexmap::IndexMap;
 use serde::{Deserialize, Serialize};
 use thiserror::Error;
 
 #[derive(Reflect, Deref)]
-#[derive_where(Deserialize, Serialize, Clone, PartialEq, Eq, Hash, Debug)]
+#[derive_where(Deserialize, Serialize)]
+#[derive_where(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
 #[serde(try_from = "String", into = "String")]
 pub struct Identifier<T> {
     #[deref]
@@ -118,7 +119,7 @@ impl<T> TryFrom<&Path> for Identifier<T> {
 
 #[derive(Deserialize, Serialize, Reflect, Deref, DerefMut)]
 #[derive_where(Default)]
-pub struct IdentifierMap<T, V>(HashMap<Identifier<T>, V>);
+pub struct IdentifierMap<T, V>(IndexMap<Identifier<T>, V>);
 
 impl<T, V: Clone> Clone for IdentifierMap<T, V> {
     fn clone(&self) -> Self {