init: extism

.cargo/config.toml

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+[build]
+target = "wasm32-unknown-unknown"

.gitignore

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+/target
+Cargo.lock

Cargo.toml

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+[package]
+name = "rust-pdk-template"
+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]
+extism-pdk = "1.3.0"
+serde = { version = "1", features = ["derive"] }

LICENSE

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+BSD 3-Clause License
+
+Copyright (c) 2024, Extism
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# Extism Rust PDK Plugin
+
+See more documentation at https://github.com/extism/rust-pdk and
+[join us on Discord](https://extism.org/discord) for more help.

src/lib.rs

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+use extism_pdk::*;
+use serde::{Deserialize, Serialize};
+
+// start with something simple
+#[plugin_fn]
+pub fn greet(name: String) -> FnResult<String> {
+    Ok(format!("Hello, {}!", name))
+}
+
+// use json data for inputs and outputs
+#[derive(FromBytes, Deserialize, PartialEq, Debug)]
+#[encoding(Json)]
+struct Add {
+    left: i32,
+    right: i32,
+}
+#[derive(ToBytes, Serialize, PartialEq, Debug)]
+#[encoding(Json)]
+struct Sum {
+    value: i32,
+}
+
+#[plugin_fn]
+pub fn add(input: Add) -> FnResult<Sum> {
+    Ok(Sum {
+        value: input.left + input.right,
+    })
+}