Fix build of wasi-nn

.gitmodules

@@ -10,7 +10,8 @@
 	branch = abis
 [submodule "crates/wasi-nn/spec"]
 	path = crates/wasi-nn/spec
-	url = https://github.com/WebAssembly/wasi-nn
+	url = https://github.com/alexcrichton/wasi-nn
+	branch = witx-next
 [submodule "crates/wasi-crypto/spec"]
 	path = crates/wasi-crypto/spec
 	url = https://github.com/WebAssembly/wasi-crypto.git

crates/wasi-nn/src/impl.rs

@@ -12,7 +12,7 @@ use wiggle::GuestPtr;
 
 #[derive(Debug, Error)]
 pub enum UsageError {
-    #[error("Only OpenVINO's IR is currently supported, passed encoding: {0}")]
+    #[error("Only OpenVINO's IR is currently supported, passed encoding: {0:?}")]
     InvalidEncoding(GraphEncoding),
     #[error("OpenVINO expects only two buffers (i.e. [ir, weights]), passed: {0}")]
     InvalidNumberOfBuilders(u32),

crates/wasi-nn/src/lib.rs

@@ -18,7 +18,6 @@ wasmtime_wiggle::wasmtime_integration!({
         wasi_ephemeral_nn => {
           name: WasiNn,
           docs: "An instantiated instance of the wasi-nn exports.",
-          function_override: {}
         }
     },
 });

crates/wasi-nn/src/witx.rs

@@ -6,23 +6,23 @@ use crate::ctx::WasiNnError;
 wiggle::from_witx!({
     witx: ["$WASI_ROOT/phases/ephemeral/witx/wasi_ephemeral_nn.witx"],
     ctx: WasiNnCtx,
-    errors: { errno => WasiNnError }
+    errors: { nn_errno => WasiNnError }
 });
 
-use types::Errno;
+use types::NnErrno;
 
 /// Wiggle generates code that performs some input validation on the arguments passed in by users of
 /// wasi-nn. Here we convert the validation error into one (or more, eventually) of the error
 /// variants defined in the witx.
 impl types::GuestErrorConversion for WasiNnCtx {
-    fn into_errno(&self, e: wiggle::GuestError) -> Errno {
+    fn into_nn_errno(&self, e: wiggle::GuestError) -> NnErrno {
         eprintln!("Guest error: {:?}", e);
-        Errno::InvalidArgument
+        NnErrno::InvalidArgument
     }
 }
 
 impl<'a> types::UserErrorConversion for WasiNnCtx {
-    fn errno_from_wasi_nn_error(&self, e: WasiNnError) -> Result<Errno, wiggle::Trap> {
+    fn nn_errno_from_wasi_nn_error(&self, e: WasiNnError) -> Result<NnErrno, wiggle::Trap> {
         eprintln!("Host error: {:?}", e);
         match e {
             WasiNnError::OpenvinoError(_) => unimplemented!(),
@@ -33,7 +33,7 @@ impl<'a> types::UserErrorConversion for WasiNnCtx {
 }
 
 /// Additionally, we must let Wiggle know which of our error codes represents a successful operation.
-impl wiggle::GuestErrorType for Errno {
+impl wiggle::GuestErrorType for NnErrno {
     fn success() -> Self {
         Self::Success
     }