Use cfg_if for parry version finding & enable parry_016 by default.

.github/workflows/test_xpbd.yml

@@ -18,4 +18,4 @@ jobs:
     - name: Install alsalib headers
       run: sudo apt-get update; sudo apt-get install --no-install-recommends libasound2-dev libudev-dev libwayland-dev libxkbcommon-dev
     - name: Run tests for repository.
-      run: cargo test --features "xpbd"
+      run: cargo test --no-default-features --features "xpbd"

Cargo.toml

@@ -70,6 +70,7 @@ bevy_rapier3d = { version = "0.27", optional = true, default-features = false, f
 bevy_xpbd_3d = { version = "0.5", optional = true, default-features = false, features = ["3d", "f32", "parry-f32"]  }
 
 smallvec = { version = "1.13", features = ["union"] }
+cfg-if = "1.0.0"
 
 [dev-dependencies]
 bevy = { version = "0.14.0", default-features = false, features = [

README.md

@@ -29,6 +29,12 @@ Takes in [Parry3d](https://crates.io/crates/parry3d) colliders that implement th
 
 You need to use `OxidizedNavigationPlugin::<Collider>::new(NavMeshSettings {...}`, where `Collider` is either a rapier or xpbd `Collider`, or your own custom collider that implements the `OxidizedCollider` trait. This is necessary to allow us to be generic over different `Collider` components.
 
+> When enabling XPBD, I get the error "You must pick a single parry3d feature."
+
+You need to disable the default `parry_016` feature as XPBD uses a different version of `Parry3d`. 
+
+*A version of `Parry3d` needs to be enabled by default for the crate to be compilable & publishable.*
+
 > I don't want to use the Rapier3d or XPBD3d physics engines just to generate a navmesh. How do I create my own `parry3d` wrapper component?
 
 You need to create a component that contains a parry3d `SharedShape`, then implement the `OxidizedCollider` trait. See the [parry3d example](./examples/parry3d.rs) for a basic example.

src/parry.rs

@@ -1,12 +1,12 @@
 
-#[cfg(feature = "parry_016")]
-pub use parry3d_016 as parry3d;
-
-#[cfg(feature = "parry_015")]
-pub use parry3d_015 as parry3d;
-
-#[cfg(all(feature = "parry_016", feature = "parry_015"))]
-compile_error!("You must pick a single parry3d feature.");
-
-#[cfg(all(not(feature = "parry_016"), not(feature = "parry_015")))]
-compile_error!("You must enabled a Parry3d feature matching your version. Either 0.16 or 0.15.");
+cfg_if::cfg_if! {
+    if #[cfg(all(feature = "parry_016", feature = "parry_015"))] {
+        compile_error!("You must pick a single parry3d feature.");
+    } else if #[cfg(feature = "parry_015")] {
+        pub use parry3d_015 as parry3d;
+    } else if #[cfg(feature = "parry_016")] {
+        pub use parry3d_016 as parry3d;
+    } else {
+        compile_error!("You must enabled either the `parry_015` or `parry_016` feature matching, whichever matches your Parry3d version.");
+    }
+}