docs: add rust kcl plugin guide documents

Signed-off-by: peefy <[email protected]>

Author: Peefy

docs/reference/plugin/overview.md

@@ -174,3 +174,81 @@ import kcl_plugin.my_plugin
 
 result = my_plugin.add(1, 1)
 ```
+
+## Use Rust to Write Plugins
+
+### 0. Prerequisites
+
+Using the KCL Rust plugin requires the presence of `Rust 1.79+` in your `PATH` and install the KCL Rust SDK.
+
+```shell
+cargo add anyhow
+cargo add kclvm-parser --git https://github.com/kcl-lang/kcl
+cargo add kclvm-loader --git https://github.com/kcl-lang/kcl
+cargo add kclvm-evaluator --git https://github.com/kcl-lang/kcl
+cargo add kclvm-runtime --git https://github.com/kcl-lang/kcl
+```
+
+### 1. Hello Plugin
+
+Write the following Rust code and add the the plugin named `my_plugin`.
+
+```rust
+use std::{cell::RefCell, rc::Rc, sync::Arc};
+use anyhow::{Result, anyhow};
+use kclvm_evaluator::Evaluator;
+use kclvm_loader::{load_packages, LoadPackageOptions};
+use kclvm_parser::LoadProgramOptions;
+use kclvm_runtime::{Context, ValueRef, IndexMap, PluginFunction};
+
+fn my_plugin_sum(_: &Context, args: &ValueRef, _: &ValueRef) -> Result<ValueRef> {
+    let a = args
+        .arg_i_int(0, Some(0))
+        .ok_or(anyhow!("expect int value for the first param"))?;
+    let b = args
+        .arg_i_int(1, Some(0))
+        .ok_or(anyhow!("expect int value for the second param"))?;
+    Ok((a + b).into())
+}
+
+fn context_with_plugin() -> Rc<RefCell<Context>> {
+    let mut plugin_functions: IndexMap<String, PluginFunction> =
+        Default::default();
+    let func = Arc::new(my_plugin_sum);
+    plugin_functions.insert("my_plugin.add".to_string(), func);
+    let mut ctx = Context::new();
+    ctx.plugin_functions = plugin_functions;
+    Rc::new(RefCell::new(ctx))
+}
+
+fn main() -> Result<()> {
+    let src = r#"
+import kcl_plugin.my_plugin
+
+sum = my_plugin.add(1, 1)
+"#;
+    let p = load_packages(&LoadPackageOptions {
+        paths: vec!["test.k".to_string()],
+        load_opts: Some(LoadProgramOptions {
+            load_plugins: true,
+            k_code_list: vec![src.to_string()],
+            ..Default::default()
+        }),
+        load_builtin: false,
+        ..Default::default()
+    })
+    .unwrap();
+    let evaluator = Evaluator::new_with_runtime_ctx(&p.program, context_with_plugin());
+    let result = evaluator.run()?;
+    println!("yaml result {}", result.1);
+    Ok(())
+}
+```
+
+The content of `test.k` are:
+
+```python
+import kcl_plugin.my_plugin
+
+result = my_plugin.add(1, 1)
+```

i18n/zh-CN/docusaurus-plugin-content-docs/current/reference/plugin/overview.md

@@ -173,3 +173,81 @@ import kcl_plugin.my_plugin
 
 result = my_plugin.add(1, 1)
 ```
+
+## 使用 Rust 编写插件
+
+### 0. 先决条件
+
+使用 KCL Rust 插件需要在您的 PATH 中具有 Rust 1.79+，并安装 KCL Rust SDK。
+
+```shell
+cargo add anyhow
+cargo add kclvm-parser --git https://github.com/kcl-lang/kcl
+cargo add kclvm-loader --git https://github.com/kcl-lang/kcl
+cargo add kclvm-evaluator --git https://github.com/kcl-lang/kcl
+cargo add kclvm-runtime --git https://github.com/kcl-lang/kcl
+```
+
+### 1. 你好插件
+
+编写以下 Rust 代码并添加名为 `my_plugin` 的插件。
+
+```rust
+use std::{cell::RefCell, rc::Rc, sync::Arc};
+use anyhow::{Result, anyhow};
+use kclvm_evaluator::Evaluator;
+use kclvm_loader::{load_packages, LoadPackageOptions};
+use kclvm_parser::LoadProgramOptions;
+use kclvm_runtime::{Context, ValueRef, IndexMap, PluginFunction};
+
+fn my_plugin_sum(_: &Context, args: &ValueRef, _: &ValueRef) -> Result<ValueRef> {
+    let a = args
+        .arg_i_int(0, Some(0))
+        .ok_or(anyhow!("expect int value for the first param"))?;
+    let b = args
+        .arg_i_int(1, Some(0))
+        .ok_or(anyhow!("expect int value for the second param"))?;
+    Ok((a + b).into())
+}
+
+fn context_with_plugin() -> Rc<RefCell<Context>> {
+    let mut plugin_functions: IndexMap<String, PluginFunction> =
+        Default::default();
+    let func = Arc::new(my_plugin_sum);
+    plugin_functions.insert("my_plugin.add".to_string(), func);
+    let mut ctx = Context::new();
+    ctx.plugin_functions = plugin_functions;
+    Rc::new(RefCell::new(ctx))
+}
+
+fn main() -> Result<()> {
+    let src = r#"
+import kcl_plugin.my_plugin
+
+sum = my_plugin.add(1, 1)
+"#;
+    let p = load_packages(&LoadPackageOptions {
+        paths: vec!["test.k".to_string()],
+        load_opts: Some(LoadProgramOptions {
+            load_plugins: true,
+            k_code_list: vec![src.to_string()],
+            ..Default::default()
+        }),
+        load_builtin: false,
+        ..Default::default()
+    })
+    .unwrap();
+    let evaluator = Evaluator::new_with_runtime_ctx(&p.program, context_with_plugin());
+    let result = evaluator.run()?;
+    println!("yaml result {}", result.1);
+    Ok(())
+}
+```
+
+test.k 的内容为：
+
+```python
+import kcl_plugin.my_plugin
+
+result = my_plugin.add(1, 1)
+```