feat: add support for generating Markdown documentation and update related commands

Signed-off-by: Gordon Smith <GordonJSmith@gmail.com>

Author: GordonSmith

package.json

@@ -176,6 +176,11 @@
                 "title": "Generate MoonBit Bindings",
                 "category": "WIT"
             },
+            {
+                "command": "wit-idl.generateBindingsMarkdown",
+                "title": "Generate Markdown Documentation",
+                "category": "WIT"
+            },
             {
                 "command": "wit-idl.extractWit",
                 "title": "Extract WIT",
@@ -263,6 +268,9 @@
                 },
                 {
                     "command": "wit-idl.generateBindingsMoonBit"
+                },
+                {
+                    "command": "wit-idl.generateBindingsMarkdown"
                 }
             ],
             "commandPalette": [
@@ -296,6 +304,10 @@
                     "command": "wit-idl.generateBindingsMoonBit",
                     "when": "editorLangId == wit || witIdl.isWasmComponent"
                 },
+                {
+                    "command": "wit-idl.generateBindingsMarkdown",
+                    "when": "editorLangId == wit || witIdl.isWasmComponent"
+                },
                 {
                     "command": "wit-idl.extractWit",
                     "when": "witIdl.isWasmComponent"

src/extension.ts

@@ -669,6 +669,7 @@ export function activate(context: vscode.ExtensionContext) {
     const generateCSharpBindingsCommand = createGenerateBindingsCommand("csharp", "CSharp");
     const generateGoBindingsCommand = createGenerateBindingsCommand("go", "Go");
     const generateMoonBitBindingsCommand = createGenerateBindingsCommand("moonbit", "MoonBit");
+    const generateMarkdownBindingsCommand = createGenerateBindingsCommand("markdown", "Markdown");
 
     const onSaveListener = vscode.workspace.onDidSaveTextDocument(async (document) => {
         if (document.languageId === "wit") {
@@ -719,6 +720,7 @@ export function activate(context: vscode.ExtensionContext) {
         generateCSharpBindingsCommand,
         generateGoBindingsCommand,
         generateMoonBitBindingsCommand,
+        generateMarkdownBindingsCommand,
         wasmToWitProvider,
         onSaveListener,
         onOpenListener,

wit-bindgen-wasm/Cargo.lock

@@ -25,6 +25,7 @@ wit-bindgen-c = "0.49"
 wit-bindgen-rust = "0.49"
 wit-bindgen-csharp = "0.49"
 wit-bindgen-moonbit = "0.49"
+wit-bindgen-markdown = "0.49"
 wit-component = "0.243"
 anyhow = "1.0.100"
 

wit-bindgen-wasm/Cargo.toml

@@ -62,6 +62,7 @@ main();
 - `has_world_definition(content: string): boolean` - Check for world definitions
 - `version(): string` - Get package version
 - `generate_bindings(content: string, language: string, world_name?: string): string` - Generate language bindings (returns JSON with file map)
+  - Supported languages: `rust`, `c`, `csharp` (or `c#`), `go`, `moonbit`, `markdown` (or `md`)
 
 ### Binary Safety Contract
 

wit-bindgen-wasm/README.md

@@ -12,6 +12,7 @@ use wit_bindgen_rust as rust;
 use wit_bindgen_c as c;
 use wit_bindgen_csharp as csharp;
 use wit_bindgen_moonbit as moonbit;
+use wit_bindgen_markdown as markdown;
 
 // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
 // allocator.
@@ -229,11 +230,12 @@ impl WitBindgen {
             "csharp" | "c#" => self.generate_csharp_bindings(content, world_name),
             "go" => self.generate_go_bindings(content, world_name),
             "moonbit" => self.generate_moonbit_bindings(content, world_name),
+            "markdown" | "md" => self.generate_markdown_bindings(content, world_name),
             _ => {
                 let mut error_files = HashMap::new();
                 error_files.insert(
                     "error.txt".to_string(), 
-                    format!("// Unsupported language: {}\n// Supported languages: rust, c, csharp, go, moonbit", language)
+                    format!("// Unsupported language: {}\n// Supported languages: rust, c, csharp, go, moonbit, markdown", language)
                 );
                 error_files
             },
@@ -411,6 +413,48 @@ impl WitBindgen {
         }
     }
 
+    /// Generate Markdown documentation using wit-bindgen-markdown library
+    fn generate_markdown_bindings(&self, content: &str, world_name: Option<String>) -> HashMap<String, String> {
+        match self.generate_markdown_with_wit_bindgen(content, world_name.as_deref()) {
+            Ok(files) => files,
+            Err(e) => {
+                console_error(&format!("wit-bindgen-markdown failed: {}", e));
+                let mut error_files = HashMap::new();
+                error_files.insert(
+                    "error.txt".to_string(),
+                    format!("Markdown generation failed: {}", e)
+                );
+                error_files
+            }
+        }
+    }
+    
+    /// Generate Markdown documentation using wit-bindgen-markdown library
+    fn generate_markdown_with_wit_bindgen(&self, content: &str, world_name: Option<&str>) -> Result<HashMap<String, String>, anyhow::Error> {
+        let inline_path = Path::new("inline.wit");
+        let mut resolve = Resolve::default();
+        let package_id = resolve.push_str(inline_path, content)?;
+        
+        let world_id = if let Some(world_name) = world_name {
+            resolve.select_world(&[package_id], Some(world_name))?
+        } else {
+            resolve.select_world(&[package_id], None)?
+        };
+        
+        let opts = markdown::Opts::default();
+        let mut generator = opts.build();
+        let mut files = Files::default();
+        
+        generator.generate(&resolve, world_id, &mut files)?;
+        
+        let mut result = HashMap::new();
+        for (filename, content) in files.iter() {
+            result.insert(filename.to_string(), bytes_to_latin1_string(content));
+        }
+        
+        Ok(result)
+    }
+
     /// Generate MoonBit bindings using wit-bindgen-moonbit library
     fn generate_moonbit_with_wit_bindgen(&self, content: &str, world_name: Option<&str>) -> Result<HashMap<String, String>, anyhow::Error> {
         let inline_path = Path::new("inline.wit");