rewrite gen-host-wasmtime-rust to use Wasmtime's component runtime

Cargo.toml

@@ -25,8 +25,8 @@ pulldown-cmark = { version = "0.8", default-features = false }
 clap = { version = "4.0.9", features = ["derive"] }
 env_logger = "0.9.1"
 
-wasmtime = "1.0"
-wasmtime-wasi = "1.0"
+wasmtime = { git = "https://github.com/bytecodealliance/wasmtime", branch = "main" , features = ["component-model"] }
+wasmtime-wasi = { git = "https://github.com/bytecodealliance/wasmtime", branch = "main" }
 wasmprinter = "0.2.41"
 wasmparser = "0.92.0"
 wasm-encoder = "0.18.0"

crates/gen-guest-rust/src/lib.rs

@@ -188,7 +188,7 @@ impl Generator for RustWasm {
         record: &Record,
         docs: &Docs,
     ) {
-        self.print_typedef_record(iface, id, record, docs);
+        self.print_typedef_record(iface, id, record, docs, false);
     }
 
     fn type_tuple(
@@ -254,7 +254,7 @@ impl Generator for RustWasm {
         variant: &Variant,
         docs: &Docs,
     ) {
-        self.print_typedef_variant(iface, id, variant, docs);
+        self.print_typedef_variant(iface, id, variant, docs, false);
     }
 
     fn type_union(
@@ -265,7 +265,7 @@ impl Generator for RustWasm {
         union: &Union,
         docs: &Docs,
     ) {
-        self.print_typedef_union(iface, id, union, docs);
+        self.print_typedef_union(iface, id, union, docs, false);
     }
 
     fn type_option(
@@ -291,7 +291,7 @@ impl Generator for RustWasm {
     }
 
     fn type_enum(&mut self, _iface: &Interface, id: TypeId, name: &str, enum_: &Enum, docs: &Docs) {
-        self.print_typedef_enum(id, name, enum_, docs);
+        self.print_typedef_enum(id, name, enum_, docs, &[], Box::new(|_| String::new()));
     }
 
     fn type_alias(&mut self, iface: &Interface, id: TypeId, _name: &str, ty: &Type, docs: &Docs) {

crates/gen-host-wasmtime-rust/Cargo.toml

@@ -20,3 +20,7 @@ test-helpers = { path = '../test-helpers' }
 wasmtime = { workspace = true }
 wasmtime-wasi = { workspace = true }
 wit-bindgen-host-wasmtime-rust = { workspace = true, features = ['tracing'] }
+
+tracing = { version = "0.1.26" }
+tracing-subscriber = { version = "0.3", default-features = false, features = ["env-filter", "fmt"]}
+test-log = { version = "0.2", default-features = false, features = ['trace'] }