feat: add stubs flag

Signed-off-by: Andrew Steurer <94206073+asteurer@users.noreply.github.com>

Author: asteurer

src/bindings.rs

@@ -7,14 +7,18 @@ pub fn generate_bindings(
     world: Option<&str>,
     features: &[String],
     all_features: bool,
+    generate_stubs: bool,
     output: Option<&Path>,
 ) -> Result<()> {
     let (resolve, world) = parse_wit(wit_path, world, features, all_features)?;
     let mut files = Default::default();
 
-    wit_bindgen_go::Opts::default()
-        .build()
-        .generate(&resolve, world, &mut files)?;
+    wit_bindgen_go::Opts {
+        generate_stubs,
+        ..Default::default()
+    }
+    .build()
+    .generate(&resolve, world, &mut files)?;
 
     let output_path = match output {
         Some(p) => {

src/command.rs

@@ -83,6 +83,12 @@ pub struct Bindings {
     /// This will be created if it does not already exist.
     #[arg(long, short = 'o')]
     pub output: Option<PathBuf>,
+
+    /// If true, generate stub functions for any exported functions and/or resources.
+    ///
+    /// A stub function is a placeholder method which has not yet been implemented.
+    #[arg(long)]
+    pub generate_stubs: bool,
 }
 
 fn componentize(common: Common, componentize: Componentize) -> Result<()> {
@@ -113,6 +119,7 @@ fn bindings(common: Common, bindings: Bindings) -> Result<()> {
         common.world.as_deref(),
         &common.features,
         common.all_features,
+        bindings.generate_stubs,
         bindings.output.as_deref(),
     )
 }