feat(pack): LibraryChunkingContext use EdgeWorker to avoid async chunk split

crates/pack-api/src/library.rs

@@ -143,7 +143,7 @@ impl LibraryEndpoint {
             self.project().client_compile_time_info().environment(),
             self.project().mode(),
             self.project().config(),
-            Vc::cell(true),
+            Vc::cell(false),
             Vc::cell(false),
             self.project().pack_path().owned().await?,
         ))

crates/pack-core/src/library/contexts.rs

@@ -8,7 +8,7 @@ use turbopack_core::{
         ChunkingContext, MangleType, MinifyType, SourceMapSourceType, SourceMapsType,
         module_id_strategies::ModuleIdStrategy,
     },
-    environment::Environment,
+    environment::{EdgeWorkerEnvironment, Environment, ExecutionEnvironment, NodeJsVersion},
     module_graph::export_usage::OptionExportUsageInfo,
 };
 
@@ -22,6 +22,9 @@ pub struct LibraryChunkingContextOptions {
     pub root_path: FileSystemPath,
     pub output_root: FileSystemPath,
     pub output_root_to_root_path: RcStr,
+    /// The environment provided by the caller. Note that this is ignored in favor of
+    /// an EdgeWorker environment to disable async chunk splitting. See
+    /// `get_library_chunking_context` for details.
     pub environment: Vc<Environment>,
     pub module_id_strategy: Vc<Box<dyn ModuleIdStrategy>>,
     pub no_mangling: Vc<bool>,
@@ -40,7 +43,8 @@ pub async fn get_library_chunking_context(
         root_path,
         output_root,
         output_root_to_root_path,
-        environment,
+        // Note: We ignore the provided environment and use EdgeWorker instead.
+        environment: _provided_environment,
         module_id_strategy,
         no_mangling,
         runtime_root,
@@ -70,12 +74,22 @@ pub async fn get_library_chunking_context(
     };
 
     let output = config.output().await?;
+    // Use an EdgeWorker environment to disable async chunk splitting for library builds.
+    // This ensures the library is bundled as a single, self-contained file.
+    let library_environment = Environment::new(ExecutionEnvironment::EdgeWorker(
+        EdgeWorkerEnvironment {
+            node_version: NodeJsVersion::default().resolved_cell(),
+        }
+        .resolved_cell(),
+    ))
+    .to_resolved()
+    .await?;
 
     let mut builder = LibraryChunkingContext::builder(
         root_path,
         output_root,
         output_root_to_root_path,
-        environment.to_resolved().await?,
+        library_environment,
         runtime_type,
         (*runtime_root.await?).clone(),
         (*runtime_export.await?).clone(),

crates/pack-tests/tests/snapshot/dynamic_import/library-chunk/config.json

@@ -0,0 +1,13 @@
+{
+    "config": {
+        "entry": [
+            {
+                "import": "input/index.ts",
+                "name": "main",
+                "library": {
+                    "name": "MyLibrary"
+                }
+            }
+        ]
+    }
+}

crates/pack-tests/tests/snapshot/dynamic_import/library-chunk/input/a.ts

@@ -0,0 +1 @@
+export const a = "a";

crates/pack-tests/tests/snapshot/dynamic_import/library-chunk/input/index.ts

@@ -0,0 +1,6 @@
+
+export async function Test() {
+    const module = await import('./a');
+    return module;
+} 
+

crates/pack-tests/tests/snapshot/dynamic_import/issues/__l___lint TP1001__ import(__q____q____q____star__-532304.txt → crates/pack-tests/tests/snapshot/dynamic_import/very-dynamic/issues/__l___lint TP1001__ import(__q____q____q____star__-d36eeb.txt

@@ -1,4 +1,4 @@
-suggestion - [analysis] /dynamic_import/input/index.ts:2:11  lint TP1001 import(???*0*) is very dynamic
+suggestion - [analysis] /dynamic_import/very-dynamic/input/index.ts:2:11  lint TP1001 import(???*0*) is very dynamic
 
        1 | export async function importUrl(url: string) {
          +            v--------------v

crates/pack-tests/tests/snapshot/dynamic_import/issues/__l___lint TP1002__ require(__q____q____q____star_-044a33.txt → crates/pack-tests/tests/snapshot/dynamic_import/very-dynamic/issues/__l___lint TP1002__ require(__q____q____q____star_-95f331.txt

@@ -1,4 +1,4 @@
-suggestion - [analysis] /dynamic_import/input/index.ts:6:11  lint TP1002 require(???*0*) is very dynamic
+suggestion - [analysis] /dynamic_import/very-dynamic/input/index.ts:6:11  lint TP1002 require(???*0*) is very dynamic
 
        2 |     return import(`${url}`).then((module) => module.default);
        3 | }

crates/pack-tests/tests/snapshot/dynamic_import/output/main.js → crates/pack-tests/tests/snapshot/dynamic_import/very-dynamic/output/main.js

@@ -1,5 +1,5 @@
 (globalThis.TURBOPACK || (globalThis.TURBOPACK = [])).push([
     typeof document === "object" ? document.currentScript : undefined,
-    {"otherChunks":["dynamic_import_input_index_ts_403d7278.js"],"runtimeModuleIds":[12]}
+    {"otherChunks":["dynamic_import_very-dynamic_input_index_ts_570ff46a.js"],"runtimeModuleIds":[67]}
 ]);
 // Dummy runtime