Turbopack: Use a different chunking context for web entry (#52404)

This fixes Turbopack integration tests.

In #51928, I made it so all dev chunking contexts output to the same directory. However, in the case of the web entry source, this can lead to conflicts. This PR ensures the chunking context is different for that one case.

packages/next-swc/crates/next-core/src/web_entry_source.rs

@@ -6,7 +6,7 @@ use turbopack_binding::{
     },
     turbopack::{
         core::{
-            chunk::ChunkableAssetVc,
+            chunk::{ChunkableAssetVc, ChunkingContextVc},
             compile_time_defines,
             compile_time_info::{
                 CompileTimeDefines, CompileTimeDefinesVc, CompileTimeInfo, CompileTimeInfoVc,
@@ -18,7 +18,7 @@ use turbopack_binding::{
             resolve::{origin::PlainResolveOriginVc, parse::RequestVc},
             source_asset::SourceAssetVc,
         },
-        dev::react_refresh::assert_can_resolve_react_refresh,
+        dev::{react_refresh::assert_can_resolve_react_refresh, DevChunkingContextVc},
         dev_server::{
             html::DevHtmlAssetVc,
             source::{asset_graph::AssetGraphContentSourceVc, ContentSourceVc},
@@ -108,6 +108,28 @@ async fn get_web_runtime_entries(
     Ok(RuntimeEntriesVc::cell(runtime_entries))
 }
 
+// This is different from `get_client_chunking_context` as we need the assets
+// to be available under a different root, otherwise we can run into conflicts.
+// We don't want to have `get_client_chunking_context` depend on the
+// `ClientContextType` as it's only relevant in this case, and would otherwise
+// create new dev chunking contexts for no reason.
+#[turbo_tasks::function]
+fn get_web_client_chunking_context(
+    project_path: FileSystemPathVc,
+    client_root: FileSystemPathVc,
+    environment: EnvironmentVc,
+) -> ChunkingContextVc {
+    DevChunkingContextVc::builder(
+        project_path,
+        client_root,
+        client_root.join("/_static/chunks"),
+        client_root.join("/_media"),
+        environment,
+    )
+    .hot_module_replacement()
+    .build()
+}
+
 #[turbo_tasks::function]
 pub async fn create_web_entry_source(
     project_root: FileSystemPathVc,
@@ -130,7 +152,7 @@ pub async fn create_web_entry_source(
         next_config,
     );
     let chunking_context =
-        get_client_chunking_context(project_root, client_root, compile_time_info.environment());
+        get_web_client_chunking_context(project_root, client_root, compile_time_info.environment());
     let entries = get_web_runtime_entries(project_root, ty, mode, next_config, execution_context);
 
     let runtime_entries = entries.resolve_entries(context);