Move generated files to the generated/ sub-directory

README.md

@@ -113,7 +113,7 @@ That means being able to reference WebAssembly components via
 same way as Rust crate dependencies:
 
 * add a dependency on a WebAssembly component to `Cargo.toml`
-* reference it like you would an external crate (via `bindings::<name>::...`) in
+* reference it like you would an external crate (via `generated::<name>::...`) in
   your source code
 * build using `cargo component build` and out pops your component!
 
@@ -130,7 +130,7 @@ including Rust.
 bindings "inline" with the component's source code.
 
 Unlike `wit-bindgen`, `cargo component` generates bindings directly into your
-project at `src/bindings.rs` so that bindings are generated based on the
+project at `src/generated/` so that bindings are generated based on the
 resolved dependencies from `Cargo.toml` rather than parsing a local definition
 of the component's interface.
 
@@ -214,9 +214,9 @@ The implementation of the component will be in `src/lib.rs`:
 
 ```rust
 #[allow(warnings)]
-mod bindings;
+mod generated;
 
-use bindings::Guest;
+use generated::Guest;
 
 struct Component;
 
@@ -227,10 +227,10 @@ impl Guest for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);
 ```
 
-The `bindings` module contains the the types and traits that correspond to the
+The `generated` module contains the the types and traits that correspond to the
 world targeted by the component; it is automatically generated by
 `cargo component`.
 

example/src/generated/mod.rs

@@ -0,0 +1,3 @@
+// Generated by `cargo-component`. DO NOT EDIT!
+mod component_bindings;
+pub use component_bindings::*;

example/src/lib.rs

@@ -1,7 +1,7 @@
 #[allow(warnings)]
-mod bindings;
+mod generated;
 
-use bindings::{
+use generated::{
     example::component::{backend as origin, cache},
     exports::example::component::backend::Guest,
 };
@@ -20,4 +20,4 @@ impl Guest for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);

src/commands/new.rs

@@ -352,7 +352,7 @@ impl NewCommand {
             None => {
                 if self.is_command() {
                     Ok(r#"#[allow(warnings)]
-mod bindings;
+mod generated;
 
 fn main() {
     println!("Hello, world!");
@@ -361,9 +361,9 @@ fn main() {
                     .into())
                 } else {
                     Ok(r#"#[allow(warnings)]
-mod bindings;
+mod generated;
 
-use bindings::Guest;
+use generated::Guest;
 
 struct Component;
 
@@ -374,7 +374,7 @@ impl Guest for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);
 "#
                     .into())
                 }

src/generator.rs

@@ -178,7 +178,7 @@ impl UseTrie {
 
         self.insert(
             [
-                "bindings",
+                "generated",
                 "exports",
                 pkg.name.namespace.as_str(),
                 pkg.name.name.as_str(),
@@ -191,7 +191,7 @@ impl UseTrie {
     /// Inserts an export trait for the given world key.
     fn insert_export_trait(&mut self, resolve: &Resolve, key: &WorldKey) -> Cow<str> {
         match key {
-            WorldKey::Name(name) => self.insert(["bindings", "exports", name.as_str()], "Guest"),
+            WorldKey::Name(name) => self.insert(["generated", "exports", name.as_str()], "Guest"),
             WorldKey::Interface(id) => {
                 let iface = &resolve.interfaces[*id];
                 self.insert_interface_type(resolve, iface, "Guest")
@@ -499,7 +499,7 @@ impl<'a> UnimplementedFunction<'a> {
         write!(
             source,
             "{name}",
-            name = trie.insert(["bindings"], &type_name)
+            name = trie.insert(["generated"], &type_name)
         )
         .unwrap();
     }
@@ -712,7 +712,7 @@ impl<'a> ImplementationGenerator<'a> {
             writeln!(
                 &mut source,
                 "\nimpl {name} for {IMPLEMENTER} {{",
-                name = trie.insert(["bindings"], "Guest")
+                name = trie.insert(["generated"], "Guest")
             )?;
 
             for (i, func) in self.functions.iter().enumerate() {
@@ -767,7 +767,7 @@ impl<'a> SourceGenerator<'a> {
         let impls = generator.generate(&mut trie)?;
 
         let mut source = String::new();
-        writeln!(&mut source, "#[allow(warnings)]\nmod bindings;")?;
+        writeln!(&mut source, "#[allow(warnings)]\nmod generated;")?;
         writeln!(&mut source)?;
         write!(
             &mut source,
@@ -787,7 +787,7 @@ impl<'a> SourceGenerator<'a> {
 
         writeln!(
             &mut source,
-            "\nbindings::export!({IMPLEMENTER} with_types_in bindings);"
+            "\ngenerated::export!({IMPLEMENTER} with_types_in generated);"
         )?;
 
         if self.format {

src/lib.rs

@@ -822,8 +822,10 @@ async fn generate_package_bindings(
         .manifest_path
         .parent()
         .unwrap()
-        .join("src");
-    let bindings_path = output_dir.join("bindings.rs");
+        .join("src")
+        .join("generated");
+    let bindings_mod_path = output_dir.join("mod.rs");
+    let bindings_path = output_dir.join("component_bindings.rs");
 
     let last_modified_output = bindings_path
         .is_file()
@@ -859,6 +861,19 @@ async fn generate_package_bindings(
                 )
             })?;
 
+            fs::write(
+                &bindings_mod_path,
+                r#"// Generated by `cargo-component`. DO NOT EDIT!
+mod component_bindings;
+pub use component_bindings::*;
+"#,
+            )
+            .with_context(|| {
+                format!(
+                    "failed to write bindings file `{path}`",
+                    path = bindings_mod_path.display()
+                )
+            })?;
             fs::write(&bindings_path, bindings).with_context(|| {
                 format!(
                     "failed to write bindings file `{path}`",

tests/bench.rs

@@ -35,11 +35,11 @@ world generator {
 #![feature(test)]
 
 #[allow(warnings)]
-mod bindings;
+mod generated;
 
 extern crate test;
 
-use bindings::{Guest, Size};
+use generated::{Guest, Size};
 use test::Bencher;
 
 struct Component;
@@ -58,7 +58,7 @@ impl Guest for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);
 
 #[bench]
 fn bench_recursive_fibonacci(b: &mut Bencher) {

tests/build.rs

@@ -277,8 +277,8 @@ world example {
     fs::write(
         project.root().join("src/lib.rs"),
         "#[allow(warnings)]
-mod bindings;
-use bindings::exports::{foo::bar::baz::{Guest as Baz, Ty}, bar::baz::qux::Guest as Qux};
+mod generated;
+use generated::exports::{foo::bar::baz::{Guest as Baz, Ty}, bar::baz::qux::Guest as Qux};
 
 struct Component;
 
@@ -294,7 +294,7 @@ impl Qux for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);
 ",
     )?;
 
@@ -334,8 +334,8 @@ fn empty_world_with_dep_valid() -> Result<()> {
         project.root().join("src/lib.rs"),
         "
             #[allow(warnings)]
-            mod bindings;
-            use bindings::{Guest, Foo};
+            mod generated;
+            use generated::{Guest, Foo};
             struct Component;
 
             impl Guest for Component {
@@ -344,7 +344,7 @@ fn empty_world_with_dep_valid() -> Result<()> {
                 }
             }
 
-            bindings::export!(Component with_types_in bindings);
+            generated::export!(Component with_types_in generated);
         ",
     )?;
 
@@ -372,11 +372,11 @@ fn empty_world_with_dep_valid() -> Result<()> {
         project.root().join("src/lib.rs"),
         "
             #[allow(warnings)]
-            mod bindings;
+            mod generated;
 
             #[no_mangle]
             pub extern \"C\" fn foo() {
-                bindings::foo_bar::hello();
+                generated::foo_bar::hello();
             }
         ",
     )?;
@@ -413,21 +413,21 @@ fn it_builds_with_resources() -> Result<()> {
         project.root().join("src/lib.rs"),
         r#"
             #[allow(warnings)]
-            mod bindings;
+            mod generated;
 
             use std::cell::Cell;
 
             struct Component;
 
-            impl bindings::exports::baz::Guest for Component {
+            impl generated::exports::baz::Guest for Component {
                 type KeyedInteger = KeyedInteger;
             }
 
-            bindings::export!(Component with_types_in bindings);
+            generated::export!(Component with_types_in generated);
 
             pub struct KeyedInteger(Cell<u32>);
 
-            impl bindings::exports::baz::GuestKeyedInteger for KeyedInteger {
+            impl generated::exports::baz::GuestKeyedInteger for KeyedInteger {
                 fn new(x: u32) -> Self {
                     Self(Cell::new(x))
                 }
@@ -486,21 +486,21 @@ fn it_builds_resources_with_specified_ownership_model() -> Result<()> {
         project.root().join("src/lib.rs"),
         r#"
             #[allow(warnings)]
-            mod bindings;
+            mod generated;
 
             use std::cell::Cell;
 
             struct Component;
 
-            impl bindings::exports::baz::Guest for Component {
+            impl generated::exports::baz::Guest for Component {
                 type KeyedInteger = KeyedInteger;
             }
 
-            bindings::export!(Component with_types_in bindings);
+            generated::export!(Component with_types_in generated);
 
             pub struct KeyedInteger(Cell<u32>);
 
-            impl bindings::exports::baz::GuestKeyedInteger for KeyedInteger {
+            impl generated::exports::baz::GuestKeyedInteger for KeyedInteger {
                 fn new(x: u32) -> Self {
                     Self(Cell::new(x))
                 }
@@ -565,9 +565,9 @@ world random-generator {
         comp1.root().join("src/lib.rs"),
         r#"
 #[allow(warnings)]
-mod bindings;
+mod generated;
 
-use bindings::{Guest, Seed, exports::my::comp1::other};
+use generated::{Guest, Seed, exports::my::comp1::other};
 
 struct Component;
 
@@ -583,7 +583,7 @@ impl other::Guest for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);
 "#,
     )?;
 
@@ -618,9 +618,9 @@ world random-generator {
         comp2.root().join("src/lib.rs"),
         r#"
 #[allow(warnings)]
-mod bindings;
+mod generated;
 
-use bindings::{Guest, my_comp1, my};
+use generated::{Guest, my_comp1, my};
 
 struct Component;
 
@@ -630,7 +630,7 @@ impl Guest for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);
 "#,
     )?;
 
@@ -741,9 +741,9 @@ world foo-world {
         project.root().join("src/lib.rs"),
         r#"
 #[allow(warnings)]
-mod bindings;
-use bindings::Guest;
-use bindings::my::derive::foo::Bar;
+mod generated;
+use generated::Guest;
+use generated::my::derive::foo::Bar;
 
 struct Component;
 
@@ -756,7 +756,7 @@ impl Guest for Component {
     }
 }
 
-bindings::export!(Component with_types_in bindings);
+generated::export!(Component with_types_in generated);
 "#,
     )?;
 
@@ -796,15 +796,15 @@ fn it_builds_with_versioned_wit() -> Result<()> {
         project.root().join("src/lib.rs"),
         r#"
             #[allow(warnings)]
-            mod bindings;
+            mod generated;
 
             struct Component;
 
-            impl bindings::exports::foo::bar::foo::Guest for Component {
+            impl generated::exports::foo::bar::foo::Guest for Component {
                 fn f() {}
             }
 
-            bindings::export!(Component with_types_in bindings);
+            generated::export!(Component with_types_in generated);
         "#,
     )?;