feat: add OutputAsset

crates/rolldown/src/bundler/bundle/bundle.rs

@@ -1,7 +1,8 @@
 use std::{borrow::Cow, hash::BuildHasherDefault};
 
-use super::asset::OutputChunk;
+use super::output::Output;
 use crate::bundler::{
+  bundle::output::OutputChunk,
   chunk::{
     chunk::{Chunk, ChunkSymbolExporter, CrossChunkImportItem},
     ChunkId, ChunksVec,
@@ -264,7 +265,7 @@ impl<'a> Bundle<'a> {
     ChunkGraph { chunks, module_to_chunk }
   }
 
-  pub fn generate(&mut self, _input_options: &'a InputOptions) -> Vec<OutputChunk> {
+  pub fn generate(&mut self, _input_options: &'a InputOptions) -> Vec<Output> {
     use rayon::prelude::*;
     let mut chunk_graph = self.generate_chunks();
 
@@ -287,14 +288,14 @@ impl<'a> Bundle<'a> {
       .map(|(_chunk_id, c)| {
         let content = c.render(self.graph, &chunk_graph, self.output_options).unwrap();
 
-        OutputChunk {
+        Output::Chunk(Box::new(OutputChunk {
           file_name: c.file_name.clone().unwrap(),
           code: content,
           is_entry: c.entry_module.is_some(),
           facade_module_id: c
             .entry_module
             .map(|id| self.graph.modules[id].expect_normal().resource_id.prettify().to_string()),
-        }
+        }))
       })
       .collect::<Vec<_>>();
 

crates/rolldown/src/bundler/bundle/mod.rs

@@ -1,3 +1,3 @@
-pub mod asset;
 #[allow(clippy::module_inception)]
 pub mod bundle;
+pub mod output;

crates/rolldown/src/bundler/bundle/output.rs

@@ -0,0 +1,35 @@
+#[derive(Debug)]
+pub struct OutputChunk {
+  pub file_name: String,
+  pub code: String,
+  pub is_entry: bool,
+  pub facade_module_id: Option<String>,
+}
+
+#[derive(Debug)]
+pub struct OutputAsset {
+  pub file_name: String,
+  pub source: String,
+}
+
+#[derive(Debug)]
+pub enum Output {
+  Chunk(Box<OutputChunk>),
+  Asset(Box<OutputAsset>),
+}
+
+impl Output {
+  pub fn file_name(&self) -> &str {
+    match self {
+      Self::Chunk(chunk) => &chunk.file_name,
+      Self::Asset(asset) => &asset.file_name,
+    }
+  }
+
+  pub fn content(&self) -> &str {
+    match self {
+      Self::Chunk(chunk) => &chunk.code,
+      Self::Asset(asset) => &asset.source,
+    }
+  }
+}

crates/rolldown/src/bundler/bundler.rs

@@ -5,7 +5,7 @@ use rolldown_fs::FileSystemExt;
 use sugar_path::AsPath;
 
 use super::{
-  bundle::asset::OutputChunk,
+  bundle::output::Output,
   graph::graph::Graph,
   plugin_driver::{PluginDriver, SharedPluginDriver},
 };
@@ -32,7 +32,7 @@ impl<T: FileSystemExt + Default + 'static> Bundler<T> {
     Self { input_options, plugin_driver: Arc::new(PluginDriver::new(plugins)), fs: Arc::new(fs) }
   }
 
-  pub async fn write(&mut self, output_options: OutputOptions) -> BuildResult<Vec<OutputChunk>> {
+  pub async fn write(&mut self, output_options: OutputOptions) -> BuildResult<Vec<Output>> {
     let dir =
       self.input_options.cwd.as_path().join(&output_options.dir).to_string_lossy().to_string();
 
@@ -46,29 +46,25 @@ impl<T: FileSystemExt + Default + 'static> Bundler<T> {
       )
     });
     for chunk in &assets {
-      let dest = dir.as_path().join(&chunk.file_name);
+      let dest = dir.as_path().join(chunk.file_name());
       if let Some(p) = dest.parent() {
         if !self.fs.exists(p) {
           self.fs.create_dir_all(p).unwrap();
         }
       };
-      self.fs.write(dest.as_path(), chunk.code.as_bytes()).unwrap_or_else(|_| {
-        panic!("Failed to write file in {:?}", dir.as_path().join(&chunk.file_name))
+      self.fs.write(dest.as_path(), chunk.content().as_bytes()).unwrap_or_else(|_| {
+        panic!("Failed to write file in {:?}", dir.as_path().join(chunk.file_name()))
       });
     }
 
     Ok(assets)
   }
 
-  pub async fn generate(&mut self, output_options: OutputOptions) -> BuildResult<Vec<OutputChunk>> {
+  pub async fn generate(&mut self, output_options: OutputOptions) -> BuildResult<Vec<Output>> {
     self.build(output_options, Arc::clone(&self.fs)).await
   }
 
-  async fn build(
-    &mut self,
-    output_options: OutputOptions,
-    fs: Arc<T>,
-  ) -> BuildResult<Vec<OutputChunk>> {
+  async fn build(&mut self, output_options: OutputOptions, fs: Arc<T>) -> BuildResult<Vec<Output>> {
     tracing::trace!("InputOptions {:#?}", self.input_options);
     tracing::trace!("OutputOptions: {output_options:#?}",);
 

crates/rolldown/src/lib.rs

@@ -10,7 +10,7 @@ pub(crate) type SharedResolver<T> = Arc<Resolver<T>>;
 
 pub use crate::{
   bundler::{
-    bundle::asset::OutputChunk,
+    bundle::output::{Output, OutputAsset, OutputChunk},
     bundler::Bundler,
     options::{
       file_name_template::FileNameTemplate,

crates/rolldown/tests/common/case.rs

@@ -1,6 +1,6 @@
 use std::{borrow::Cow, path::Path};
 
-use rolldown::OutputChunk;
+use rolldown::Output;
 use rolldown_error::BuildError;
 use string_wizard::MagicString;
 
@@ -40,18 +40,18 @@ impl Case {
     self.fixture.exec();
   }
 
-  fn render_assets_to_snapshot(&mut self, mut assets: Vec<OutputChunk>) {
+  fn render_assets_to_snapshot(&mut self, mut assets: Vec<Output>) {
     self.snapshot.append("# Assets\n\n");
-    assets.sort_by_key(|c| c.file_name.clone());
+    assets.sort_by_key(|c| c.file_name().to_string());
     let artifacts = assets
       .iter()
       // FIXME: should render the runtime module while tree shaking being supported
-      .filter(|asset| !asset.file_name.contains("rolldown_runtime"))
+      .filter(|asset| !asset.file_name().contains("rolldown_runtime"))
       .flat_map(|asset| {
         [
-          Cow::Owned(format!("## {}\n", asset.file_name)),
+          Cow::Owned(format!("## {}\n", asset.file_name())),
           "```js".into(),
-          Cow::Borrowed(asset.code.trim()),
+          Cow::Borrowed(asset.content().trim()),
           "```".into(),
         ]
       })

crates/rolldown/tests/common/fixture.rs

@@ -4,7 +4,7 @@ use std::{
   process::Command,
 };
 
-use rolldown::{Bundler, FileNameTemplate, InputOptions, OutputChunk, OutputOptions};
+use rolldown::{Bundler, FileNameTemplate, InputOptions, Output, OutputOptions};
 use rolldown_error::BuildError;
 use rolldown_fs::FileSystemOs;
 use rolldown_testing::TestConfig;
@@ -81,7 +81,7 @@ impl Fixture {
     }
   }
 
-  pub async fn compile(&mut self) -> Result<Vec<OutputChunk>, Vec<BuildError>> {
+  pub async fn compile(&mut self) -> Result<Vec<Output>, Vec<BuildError>> {
     let fixture_path = self.dir_path();
 
     let mut test_config = self.test_config();

crates/rolldown_binding/index.d.ts

@@ -48,8 +48,16 @@ export interface OutputChunk {
   isEntry: boolean
   facadeModuleId?: string
 }
+export interface OutputAsset {
+  fileName: string
+  source: string
+}
+export interface Outputs {
+  chunks: Array<OutputChunk>
+  assets: Array<OutputAsset>
+}
 export class Bundler {
   constructor(inputOpts: InputOptions)
-  write(opts: OutputOptions): Promise<Array<OutputChunk>>
-  generate(opts: OutputOptions): Promise<Array<OutputChunk>>
+  write(opts: OutputOptions): Promise<Outputs>
+  generate(opts: OutputOptions): Promise<Outputs>
 }

crates/rolldown_binding/src/bundler.rs

@@ -5,7 +5,7 @@ use rolldown_fs::FileSystemOs;
 use tracing::instrument;
 
 use crate::{
-  options::InputOptions, options::OutputOptions, output_chunk::OutputChunk,
+  options::InputOptions, options::OutputOptions, output::Outputs,
   utils::init_custom_trace_subscriber, NAPI_ENV,
 };
 
@@ -23,12 +23,12 @@ impl Bundler {
   }
 
   #[napi]
-  pub async fn write(&self, opts: OutputOptions) -> napi::Result<Vec<OutputChunk>> {
+  pub async fn write(&self, opts: OutputOptions) -> napi::Result<Outputs> {
     self.write_impl(opts).await
   }
 
   #[napi]
-  pub async fn generate(&self, opts: OutputOptions) -> napi::Result<Vec<OutputChunk>> {
+  pub async fn generate(&self, opts: OutputOptions) -> napi::Result<Outputs> {
     self.generate_impl(opts).await
   }
 }
@@ -50,7 +50,7 @@ impl Bundler {
 
   #[instrument(skip_all)]
   #[allow(clippy::significant_drop_tightening)]
-  pub async fn write_impl(&self, output_opts: OutputOptions) -> napi::Result<Vec<OutputChunk>> {
+  pub async fn write_impl(&self, output_opts: OutputOptions) -> napi::Result<Outputs> {
     let mut bundler_core = self.inner.try_lock().map_err(|_| {
       napi::Error::from_reason("Failed to lock the bundler. Is another operation in progress?")
     })?;
@@ -68,13 +68,12 @@ impl Bundler {
       }
     };
 
-    let output_chunks = outputs.into_iter().map(Into::into).collect::<Vec<_>>();
-    Ok(output_chunks)
+    Ok(outputs.into())
   }
 
   #[instrument(skip_all)]
   #[allow(clippy::significant_drop_tightening)]
-  pub async fn generate_impl(&self, output_opts: OutputOptions) -> napi::Result<Vec<OutputChunk>> {
+  pub async fn generate_impl(&self, output_opts: OutputOptions) -> napi::Result<Outputs> {
     let mut bundler_core = self.inner.try_lock().map_err(|_| {
       napi::Error::from_reason("Failed to lock the bundler. Is another operation in progress?")
     })?;
@@ -92,7 +91,6 @@ impl Bundler {
       }
     };
 
-    let output_chunks = outputs.into_iter().map(Into::into).collect::<Vec<_>>();
-    Ok(output_chunks)
+    Ok(outputs.into())
   }
 }

crates/rolldown_binding/src/lib.rs

@@ -7,6 +7,6 @@ static ALLOC: mimalloc_rust::GlobalMiMalloc = mimalloc_rust::GlobalMiMalloc;
 
 pub mod bundler;
 pub mod options;
-pub mod output_chunk;
+pub mod output;
 pub mod utils;
 scoped_tls::scoped_thread_local!(static NAPI_ENV: napi::Env);

crates/rolldown_binding/src/output.rs

@@ -0,0 +1,62 @@
+use derivative::Derivative;
+use serde::Deserialize;
+
+#[napi_derive::napi(object)]
+#[derive(Deserialize, Default, Derivative)]
+#[serde(rename_all = "camelCase")]
+#[derivative(Debug)]
+pub struct OutputChunk {
+  pub code: String,
+  pub file_name: String,
+  pub is_entry: bool,
+  pub facade_module_id: Option<String>,
+}
+
+impl From<Box<rolldown::OutputChunk>> for OutputChunk {
+  fn from(chunk: Box<rolldown::OutputChunk>) -> Self {
+    Self {
+      code: chunk.code,
+      file_name: chunk.file_name,
+      is_entry: chunk.is_entry,
+      facade_module_id: chunk.facade_module_id,
+    }
+  }
+}
+
+#[napi_derive::napi(object)]
+#[derive(Deserialize, Default, Derivative)]
+#[serde(rename_all = "camelCase")]
+#[derivative(Debug)]
+pub struct OutputAsset {
+  pub file_name: String,
+  pub source: String,
+}
+
+impl From<Box<rolldown::OutputAsset>> for OutputAsset {
+  fn from(chunk: Box<rolldown::OutputAsset>) -> Self {
+    Self { source: chunk.source, file_name: chunk.file_name }
+  }
+}
+
+#[napi_derive::napi(object)]
+#[derive(Deserialize, Default, Derivative)]
+#[serde(rename_all = "camelCase")]
+#[derivative(Debug)]
+pub struct Outputs {
+  pub chunks: Vec<OutputChunk>,
+  pub assets: Vec<OutputAsset>,
+}
+
+impl From<Vec<rolldown::Output>> for Outputs {
+  fn from(outputs: Vec<rolldown::Output>) -> Self {
+    let mut chunks: Vec<OutputChunk> = vec![];
+    let mut assets: Vec<OutputAsset> = vec![];
+
+    outputs.into_iter().for_each(|o| match o {
+      rolldown::Output::Chunk(chunk) => chunks.push(chunk.into()),
+      rolldown::Output::Asset(asset) => assets.push(asset.into()),
+    });
+
+    Self { chunks, assets }
+  }
+}

crates/rolldown_binding_wasm/src/lib.rs

@@ -60,7 +60,10 @@ pub fn bundle(file_list: Vec<FileItem>) -> Vec<AssetItem> {
       match bundler.write(OutputOptions::default()).await {
         Ok(assets) => assets
           .into_iter()
-          .map(|item| AssetItem { name: item.file_name, content: item.code })
+          .map(|item| AssetItem {
+            name: item.file_name().to_string(),
+            content: item.content().to_owned(),
+          })
           .collect::<Vec<_>>(),
         Err(err) => {
           panic!("{err:?}",);

packages/core/src/rollup-types.ts

@@ -8,4 +8,5 @@ export type {
   OutputPlugin,
   OutputChunk,
   NormalizedInputOptions,
+  OutputAsset,
 } from 'rollup'