update and fix examples (#120)

An earlier commit which updated various dependencies (most notably, Wasmtime)
unmasked a bug in `add_wasi_and_stubs` such that we were overwriting the host
functions added by `wasmtime-wasi` with trapping stubs.  This wasn't a problem
previously because there was only one version of WASIp2: 0.2.0.  Now that we
have 0.2.1, 0.2.2, etc., with corresponding support in Wasmtime, we need to be a
bit more careful.

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

Author: dicej

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "componentize-py"
-version = "0.15.0"
+version = "0.15.1"
 edition = "2021"
 exclude = ["cpython"]
 

Cargo.toml

@@ -9,16 +9,16 @@ run a Python-based component targetting the [wasi-cli] `command` world.
 
 ## Prerequisites
 
-* `Wasmtime` 18.0.0 or later
-* `componentize-py` 0.15.0
+* `Wasmtime` 26.0.0 or later
+* `componentize-py` 0.15.1
 
 Below, we use [Rust](https://rustup.rs/)'s `cargo` to install `Wasmtime`.  If
 you don't have `cargo`, you can download and install from
-https://github.com/bytecodealliance/wasmtime/releases/tag/v18.0.0.
+https://github.com/bytecodealliance/wasmtime/releases/tag/v26.0.0.
 
 ```
-cargo install --version 18.0.0 wasmtime-cli
-pip install componentize-py==0.15.0
+cargo install --version 26.0.0 wasmtime-cli
+pip install componentize-py==0.15.1
 ```
 
 ## Running the demo

examples/cli/README.md

@@ -9,16 +9,16 @@ run a Python-based component targetting the [wasi-http] `proxy` world.
 
 ## Prerequisites
 
-* `Wasmtime` 18.0.0 or later
-* `componentize-py` 0.15.0
+* `Wasmtime` 26.0.0 or later
+* `componentize-py` 0.15.1
 
 Below, we use [Rust](https://rustup.rs/)'s `cargo` to install `Wasmtime`.  If
 you don't have `cargo`, you can download and install from
-https://github.com/bytecodealliance/wasmtime/releases/tag/v18.0.0.
+https://github.com/bytecodealliance/wasmtime/releases/tag/v26.0.0.
 
 ```
-cargo install --version 18.0.0 wasmtime-cli
-pip install componentize-py==0.15.0
+cargo install --version 26.0.0 wasmtime-cli
+pip install componentize-py==0.15.1
 ```
 
 ## Running the demo

examples/http/README.md

@@ -10,20 +10,20 @@ within a guest component.
 
 ## Prerequisites
 
-* `wasmtime` 18.0.0 or later
-* `componentize-py` 0.15.0
+* `wasmtime` 26.0.0 or later
+* `componentize-py` 0.15.1
 * `NumPy`, built for WASI
 
 Note that we use an unofficial build of NumPy since the upstream project does
 not yet publish WASI builds.
 
 Below, we use [Rust](https://rustup.rs/)'s `cargo` to install `Wasmtime`.  If
 you don't have `cargo`, you can download and install from
-https://github.com/bytecodealliance/wasmtime/releases/tag/v18.0.0.
+https://github.com/bytecodealliance/wasmtime/releases/tag/v26.0.0.
 
 ```
-cargo install --version 18.0.0 wasmtime-cli
-pip install componentize-py==0.15.0
+cargo install --version 26.0.0 wasmtime-cli
+pip install componentize-py==0.15.1
 curl -OL https://github.com/dicej/wasi-wheels/releases/download/v0.0.1/numpy-wasi.tar.gz
 tar xf numpy-wasi.tar.gz
 ```

examples/matrix-math/README.md

@@ -7,11 +7,11 @@ sandboxed Python code snippets from within a Python app.
 
 ## Prerequisites
 
-* `wasmtime-py` 18.0.0 or later
-* `componentize-py` 0.15.0
+* `wasmtime-py` 25.0.0 or later
+* `componentize-py` 0.15.1
 
 ```
-pip install componentize-py==0.15.0 wasmtime==18.0.2
+pip install componentize-py==0.15.1 wasmtime==25.0.0
 ```
 
 ## Running the demo

examples/sandbox/README.md

@@ -10,16 +10,16 @@ making an outbound TCP request using `wasi-sockets`.
 
 ## Prerequisites
 
-* `Wasmtime` 18.0.0 or later
-* `componentize-py` 0.15.0
+* `Wasmtime` 26.0.0 or later
+* `componentize-py` 0.15.1
 
 Below, we use [Rust](https://rustup.rs/)'s `cargo` to install `Wasmtime`.  If
 you don't have `cargo`, you can download and install from
-https://github.com/bytecodealliance/wasmtime/releases/tag/v18.0.0.
+https://github.com/bytecodealliance/wasmtime/releases/tag/v26.0.0.
 
 ```
-cargo install --version 18.0.0 wasmtime-cli
-pip install componentize-py==0.15.0
+cargo install --version 26.0.0 wasmtime-cli
+pip install componentize-py==0.15.1
 ```
 
 ## Running the demo

examples/tcp/README.md

@@ -7,7 +7,7 @@ features = ["pyo3/extension-module"]
 
 [project]
 name = "componentize-py"
-version = "0.15.0"
+version = "0.15.1"
 description = "Tool to package Python applications as WebAssembly components"
 readme = "README.md"
 license = { file = "LICENSE" }

pyproject.toml

@@ -601,25 +601,32 @@ fn add_wasi_and_stubs(
 
     for (interface_name, stubs) in stubs {
         if let Some(interface_name) = interface_name {
-            if let Ok(mut instance) = linker.instance(&interface_name) {
-                for stub in stubs {
-                    let interface_name = interface_name.clone();
-                    match stub {
-                        Stub::Function(name) => instance.func_new(name, {
-                            let name = name.clone();
-                            move |_, _, _| {
-                                Err(anyhow!("called trapping stub: {interface_name}#{name}"))
-                            }
-                        }),
-                        Stub::Resource(name) => instance
-                            .resource(name, ResourceType::host::<()>(), {
+            // Note that we do _not_ stub interfaces which appear to be part of WASIp2 since those should be
+            // provided by the `wasmtime_wasi::add_to_linker_async` call above, and adding stubs to those same
+            // interfaces would just cause trouble.
+            if !is_wasip2_cli(&interface_name) {
+                if let Ok(mut instance) = linker.instance(&interface_name) {
+                    for stub in stubs {
+                        let interface_name = interface_name.clone();
+                        match stub {
+                            Stub::Function(name) => instance.func_new(name, {
                                 let name = name.clone();
-                                move |_, _| {
+                                move |_, _, _| {
                                     Err(anyhow!("called trapping stub: {interface_name}#{name}"))
                                 }
-                            })
-                            .map(drop),
-                    }?;
+                            }),
+                            Stub::Resource(name) => instance
+                                .resource(name, ResourceType::host::<()>(), {
+                                    let name = name.clone();
+                                    move |_, _| {
+                                        Err(anyhow!(
+                                            "called trapping stub: {interface_name}#{name}"
+                                        ))
+                                    }
+                                })
+                                .map(drop),
+                        }?;
+                    }
                 }
             }
         } else {
@@ -643,3 +650,13 @@ fn add_wasi_and_stubs(
 
     Ok(())
 }
+
+fn is_wasip2_cli(interface_name: &str) -> bool {
+    (interface_name.starts_with("wasi:cli/")
+        || interface_name.starts_with("wasi:clocks/")
+        || interface_name.starts_with("wasi:random/")
+        || interface_name.starts_with("wasi:io/")
+        || interface_name.starts_with("wasi:filesystem/")
+        || interface_name.starts_with("wasi:sockets/"))
+        && interface_name.contains("@0.2.")
+}