feat: support preserve_modules

Author: JSerFeng

crates/node_binding/napi-binding.d.ts

@@ -2087,6 +2087,10 @@ export interface RawEnvironment {
   dynamicImportInWorker?: boolean
 }
 
+export interface RawEsmLibraryPlugin {
+  preserveModules?: string
+}
+
 export interface RawEvalDevToolModulePluginOptions {
   namespace?: string
   moduleFilenameTemplate?: string | ((info: RawModuleFilenameTemplateFnCtx) => string)

crates/rspack_binding_api/src/raw_options/raw_builtins/mod.rs

@@ -6,6 +6,7 @@ mod raw_copy;
 mod raw_css_chunking;
 mod raw_css_extract;
 mod raw_dll;
+mod raw_esm_lib;
 mod raw_html;
 mod raw_http_uri;
 mod raw_ids;
@@ -128,7 +129,7 @@ use crate::{
   raw_options::{
     RawDynamicEntryPluginOptions, RawEvalDevToolModulePluginOptions, RawExternalItemWrapper,
     RawExternalsPluginOptions, RawHttpExternalsRspackPluginOptions, RawSplitChunksOptions,
-    SourceMapDevToolPluginOptions,
+    SourceMapDevToolPluginOptions, raw_builtins::raw_esm_lib::RawEsmLibraryPlugin,
   },
   rslib::RawRslibPluginOptions,
 };
@@ -410,7 +411,10 @@ impl<'a> BuiltinPlugin<'a> {
         plugins.push(CommonJsChunkFormatPlugin::default().boxed());
       }
       BuiltinPluginName::EsmLibraryPlugin => {
-        plugins.push(EsmLibraryPlugin::default().boxed());
+        let options = downcast_into::<RawEsmLibraryPlugin>(self.options)
+          .map_err(|report| napi::Error::from_reason(report.to_string()))?;
+        plugins
+          .push(EsmLibraryPlugin::new(options.preserve_modules.as_deref().map(Into::into)).boxed());
       }
       BuiltinPluginName::ArrayPushCallbackChunkFormatPlugin => {
         plugins.push(ArrayPushCallbackChunkFormatPlugin::default().boxed());

crates/rspack_binding_api/src/raw_options/raw_builtins/raw_esm_lib.rs

@@ -0,0 +1,4 @@
+#[napi(object, object_to_js = false)]
+pub struct RawEsmLibraryPlugin {
+  pub preserve_modules: Option<String>,
+}

crates/rspack_plugin_esm_library/src/chunk_link.rs

@@ -264,7 +264,7 @@ pub struct ChunkLinkContext {
   specifier order doesn't matter, we can sort them based on name
   Map<module_id, Map<local_name, export_name>>
   */
-  exports: FxHashMap<Atom, FxHashSet<Atom>>,
+  exports: FxHashMap<Atom, FxIndexSet<Atom>>,
 
   /**
   symbols that this chunk provides
@@ -396,11 +396,11 @@ impl ChunkLinkContext {
     set.get(&export_name).expect("should have inserted")
   }
 
-  pub fn exports(&self) -> &FxHashMap<Atom, FxHashSet<Atom>> {
+  pub fn exports(&self) -> &FxHashMap<Atom, FxIndexSet<Atom>> {
     &self.exports
   }
 
-  pub fn exports_mut(&mut self) -> &mut FxHashMap<Atom, FxHashSet<Atom>> {
+  pub fn exports_mut(&mut self) -> &mut FxHashMap<Atom, FxIndexSet<Atom>> {
     &mut self.exports
   }
 

crates/rspack_plugin_esm_library/src/lib.rs

@@ -2,6 +2,7 @@ mod chunk_link;
 mod dependency;
 mod link;
 mod plugin;
+mod preserve_modules;
 mod render;
 mod runtime;
 pub use plugin::EsmLibraryPlugin;