chore: split examples into std and no_std

Signed-off-by: Roman Volosatovs <[email protected]>

Author: rvolosatovs

Cargo.toml

@@ -28,14 +28,32 @@ std = []
 # Unstable feature to support being a libstd dependency
 rustc-dep-of-std = ["compiler_builtins", "core", "rustc-std-workspace-alloc"]
 
+[[example]]
+name = "cli-command-no_std"
+crate-type = ["cdylib"]
+
 [[example]]
 name = "cli-command"
 crate-type = ["cdylib"]
+required-features = ["std"]
+
+[[example]]
+name = "hello-world"
+required-features = ["std"]
+
+[[example]]
+name = "http-proxy-no_std"
+crate-type = ["cdylib"]
 
 [[example]]
 name = "http-proxy"
 crate-type = ["cdylib"]
+required-features = ["std"]
 
 [[example]]
-name = "rand"
+name = "rand-no_std"
 required-features = ["rand"]
+
+[[example]]
+name = "rand"
+required-features = ["std", "rand"]

examples/cli-command-no_std.rs

@@ -0,0 +1,11 @@
+wasi::cli::command::export!(Example);
+
+struct Example;
+
+impl wasi::exports::cli::run::Guest for Example {
+    fn run() -> Result<(), ()> {
+        let stdout = wasi::cli::stdout::get_stdout();
+        stdout.blocking_write_and_flush(b"Hello, WASI!").unwrap();
+        Ok(())
+    }
+}

examples/hello-world-no_std.rs

@@ -0,0 +1,4 @@
+fn main() {
+    let stdout = wasi::cli::stdout::get_stdout();
+    stdout.blocking_write_and_flush(b"Hello, world!\n").unwrap();
+}

examples/http-proxy-no_std.rs

@@ -0,0 +1,22 @@
+use wasi::http::types::{
+    Fields, IncomingRequest, OutgoingBody, OutgoingResponse, ResponseOutparam,
+};
+
+wasi::http::proxy::export!(Example);
+
+struct Example;
+
+impl wasi::exports::http::incoming_handler::Guest for Example {
+    fn handle(_request: IncomingRequest, response_out: ResponseOutparam) {
+        let resp = OutgoingResponse::new(Fields::new());
+        let body = resp.body().unwrap();
+
+        ResponseOutparam::set(response_out, Ok(resp));
+
+        let out = body.write().unwrap();
+        out.blocking_write_and_flush(b"Hello, WASI!").unwrap();
+        drop(out);
+
+        OutgoingBody::finish(body, None).unwrap();
+    }
+}

examples/rand-no_std.rs

@@ -0,0 +1,19 @@
+use wasi::ext::rand::rand::Rng as _;
+use wasi::ext::rand::{HostInsecureRng, HostRng};
+
+fn main() {
+    let stdout = wasi::cli::stdout::get_stdout();
+
+    let r: u64 = HostRng.gen();
+
+    stdout
+        .blocking_write_and_flush(
+            format!("Cryptographically-secure random u64 is {r}\n").as_bytes(),
+        )
+        .unwrap();
+
+    let r: u64 = HostInsecureRng.gen();
+    stdout
+        .blocking_write_and_flush(format!("Pseudo-random u64 is {r}\n").as_bytes())
+        .unwrap();
+}