feat: add wit-bindgen-sample

__wasm/wit-bindgen-sample/.gitignore

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+wit-bindgen

__wasm/wit-bindgen-sample/README.md

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+
+git clone https://github.com/bytecodealliance/wit-bindgen.git
+

__wasm/wit-bindgen-sample/container.wit

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+fetch: func(config: string) -> string

__wasm/wit-bindgen-sample/engine/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
+version = "1.0.58"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "syn",
+]
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+
+[[package]]
+name = "engine"
+version = "0.1.0"
+dependencies = [
+ "wit-bindgen-gen-core",
+ "wit-bindgen-rust",
+]
+
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+dependencies = [
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+ "memchr",
+ "unicase",
+]
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+ "proc-macro2",
+]
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+name = "syn"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "tinyvec"
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+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+]
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+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "wit-parser",
+]
+
+[[package]]
+name = "wit-bindgen-gen-rust"
+version = "0.1.0"
+dependencies = [
+ "heck",
+ "wit-bindgen-gen-core",
+]
+
+[[package]]
+name = "wit-bindgen-gen-rust-wasm"
+version = "0.1.0"
+dependencies = [
+ "heck",
+ "wit-bindgen-gen-core",
+ "wit-bindgen-gen-rust",
+]
+
+[[package]]
+name = "wit-bindgen-rust"
+version = "0.1.0"
+dependencies = [
+ "async-trait",
+ "bitflags",
+ "wit-bindgen-rust-impl",
+]
+
+[[package]]
+name = "wit-bindgen-rust-impl"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "syn",
+ "wit-bindgen-gen-core",
+ "wit-bindgen-gen-rust-wasm",
+]
+
+[[package]]
+name = "wit-parser"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "id-arena",
+ "pulldown-cmark",
+ "unicode-normalization",
+ "unicode-xid",
+]

__wasm/wit-bindgen-sample/engine/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "engine"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate-type = ['cdylib']
+
+[dependencies]
+wit-bindgen-gen-core = { path = '../wit-bindgen/crates/gen-core' }
+wit-bindgen-rust = { path = '../wit-bindgen/crates/rust-wasm' }

__wasm/wit-bindgen-sample/engine/src/lib.rs

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+wit_bindgen_rust::export!("../exports.wit");
+wit_bindgen_rust::import!("../container.wit");
+
+struct Exports;
+
+impl exports::Exports for Exports {
+    fn eval_javascript(s: String) -> String {
+        // let a = container::fetch("");
+        "".into()
+    }
+}
+
+fn fetch_from_host(config: &str) -> String {
+    container::fetch(config)
+}

__wasm/wit-bindgen-sample/exports.wit

@@ -0,0 +1,2 @@
+eval-javascript: func(script: string) -> string
+