feat: support custom image loaders in turbopack

packages/next-swc/crates/next-core/js/src/entry/config/next.js

@@ -2,6 +2,7 @@ import loadConfig from 'next/dist/server/config'
 import loadCustomRoutes from 'next/dist/lib/load-custom-routes'
 import { PHASE_DEVELOPMENT_SERVER } from 'next/dist/shared/lib/constants'
 import assert from 'node:assert'
+import * as path from 'node:path'
 
 const loadNextConfig = async (silent) => {
   const nextConfig = await loadConfig(
@@ -45,6 +46,12 @@ const loadNextConfig = async (silent) => {
     )
   }
 
+  // loaderFile is an absolute path, we need it to be relative for turbopack.
+  if (nextConfig.images.loaderFile) {
+    nextConfig.images.loaderFile =
+      './' + path.relative(process.cwd(), nextConfig.images.loaderFile)
+  }
+
   return {
     customRoutes: customRoutes,
     config: nextConfig,

packages/next-swc/crates/next-core/src/next_client/context.rs

@@ -145,7 +145,7 @@ pub async fn get_client_resolve_options_context(
     execution_context: Vc<ExecutionContext>,
 ) -> Result<Vc<ResolveOptionsContext>> {
     let next_client_import_map =
-        get_next_client_import_map(project_path, ty, mode, next_config, execution_context);
+        get_next_client_import_map(project_path, ty, next_config, execution_context);
     let next_client_fallback_import_map = get_next_client_fallback_import_map(ty);
     let next_client_resolved_map = get_next_client_resolved_map(project_path, project_path, mode);
     let module_options_context = ResolveOptionsContext {

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

@@ -1,6 +1,6 @@
 use anyhow::{Context, Result};
 use indexmap::IndexMap;
-use serde::{Deserialize, Serialize};
+use serde::{Deserialize, Deserializer, Serialize};
 use serde_json::Value as JsonValue;
 use turbo_tasks::{trace::TraceRawVcs, Completion, Value, Vc};
 use turbo_tasks_fs::json::parse_json_with_source_context;
@@ -310,6 +310,8 @@ pub struct ImageConfig {
     pub image_sizes: Vec<u16>,
     pub path: String,
     pub loader: ImageLoader,
+    #[serde(deserialize_with = "empty_string_is_none")]
+    pub loader_file: Option<String>,
     pub domains: Vec<String>,
     pub disable_static_images: bool,
     #[serde(rename(deserialize = "minimumCacheTTL"))]
@@ -322,6 +324,14 @@ pub struct ImageConfig {
     pub unoptimized: bool,
 }
 
+fn empty_string_is_none<'de, D>(deserializer: D) -> Result<Option<String>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let o = Option::<String>::deserialize(deserializer)?;
+    Ok(o.filter(|s| !s.is_empty()))
+}
+
 impl Default for ImageConfig {
     fn default() -> Self {
         // https://github.com/vercel/next.js/blob/327634eb/packages/next/shared/lib/image-config.ts#L100-L114
@@ -330,6 +340,7 @@ impl Default for ImageConfig {
             image_sizes: vec![16, 32, 48, 64, 96, 128, 256, 384],
             path: "/_next/image".to_string(),
             loader: ImageLoader::Default,
+            loader_file: None,
             domains: vec![],
             disable_static_images: false,
             minimum_cache_ttl: 60,

packages/next-swc/crates/next-core/src/next_edge/context.rs

@@ -99,7 +99,7 @@ pub async fn get_edge_resolve_options_context(
     execution_context: Vc<ExecutionContext>,
 ) -> Result<Vc<ResolveOptionsContext>> {
     let next_edge_import_map =
-        get_next_edge_import_map(project_path, ty, mode, next_config, execution_context);
+        get_next_edge_import_map(project_path, ty, next_config, execution_context);
 
     let ty = ty.into_value();
 

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

@@ -40,7 +40,6 @@ use crate::{
 pub async fn get_next_client_import_map(
     project_path: Vc<FileSystemPath>,
     ty: Value<ClientContextType>,
-    mode: NextMode,
     next_config: Vc<NextConfig>,
     execution_context: Vc<ExecutionContext>,
 ) -> Result<Vc<ImportMap>> {
@@ -51,7 +50,6 @@ pub async fn get_next_client_import_map(
         project_path,
         execution_context,
         next_config,
-        mode,
     )
     .await?;
 
@@ -261,7 +259,6 @@ pub fn get_next_client_fallback_import_map(ty: Value<ClientContextType>) -> Vc<I
 pub async fn get_next_server_import_map(
     project_path: Vc<FileSystemPath>,
     ty: Value<ServerContextType>,
-    mode: NextMode,
     next_config: Vc<NextConfig>,
     execution_context: Vc<ExecutionContext>,
 ) -> Result<Vc<ImportMap>> {
@@ -272,7 +269,6 @@ pub async fn get_next_server_import_map(
         project_path,
         execution_context,
         next_config,
-        mode,
     )
     .await?;
 
@@ -338,7 +334,6 @@ pub async fn get_next_server_import_map(
 pub async fn get_next_edge_import_map(
     project_path: Vc<FileSystemPath>,
     ty: Value<ServerContextType>,
-    mode: NextMode,
     next_config: Vc<NextConfig>,
     execution_context: Vc<ExecutionContext>,
 ) -> Result<Vc<ImportMap>> {
@@ -399,7 +394,6 @@ pub async fn get_next_edge_import_map(
         project_path,
         execution_context,
         next_config,
-        mode,
     )
     .await?;
 
@@ -521,6 +515,21 @@ async fn insert_next_server_special_aliases(
         external_if_node(project_path, "next/dist/compiled/@opentelemetry/api"),
     );
 
+    let image_config = next_config.image_config().await?;
+    if let Some(loader_file) = image_config.loader_file.as_deref() {
+        import_map.insert_exact_alias(
+            "next/dist/shared/lib/image-loader",
+            request_to_import_mapping(project_path, loader_file),
+        );
+
+        if runtime == NextRuntime::Edge {
+            import_map.insert_exact_alias(
+                "next/dist/esm/shared/lib/image-loader",
+                request_to_import_mapping(project_path, loader_file),
+            );
+        }
+    }
+
     match ty {
         ServerContextType::Pages { pages_dir } | ServerContextType::PagesApi { pages_dir } => {
             insert_alias_to_alternatives(
@@ -745,7 +754,6 @@ async fn insert_next_shared_aliases(
     project_path: Vc<FileSystemPath>,
     execution_context: Vc<ExecutionContext>,
     next_config: Vc<NextConfig>,
-    mode: NextMode,
 ) -> Result<()> {
     let package_root = next_js_fs().root();
 
@@ -761,15 +769,6 @@ async fn insert_next_shared_aliases(
         );
     }
 
-    if mode != NextMode::Development {
-        // we use the next.js hydration code, so we replace the error overlay with our
-        // own
-        import_map.insert_exact_alias(
-            "next/dist/compiled/@next/react-dev-overlay/dist/client",
-            request_to_import_mapping(package_root, "./overlay/client.ts"),
-        );
-    }
-
     insert_package_alias(
         import_map,
         &format!("{VIRTUAL_PACKAGE_NAME}/"),

packages/next-swc/crates/next-core/src/next_server/context.rs

@@ -104,7 +104,7 @@ pub async fn get_server_resolve_options_context(
     execution_context: Vc<ExecutionContext>,
 ) -> Result<Vc<ResolveOptionsContext>> {
     let next_server_import_map =
-        get_next_server_import_map(project_path, ty, mode, next_config, execution_context);
+        get_next_server_import_map(project_path, ty, next_config, execution_context);
     let foreign_code_context_condition =
         foreign_code_context_condition(next_config, project_path).await?;
     let root_dir = project_path.root().resolve().await?;

packages/next/src/build/swc/index.ts

@@ -796,7 +796,8 @@ function bindingToApi(binding: any, _wasm: boolean) {
     return {
       ...options,
       nextConfig:
-        options.nextConfig && (await serializeNextConfig(options.nextConfig)),
+        options.nextConfig &&
+        (await serializeNextConfig(options.nextConfig, options.projectPath!)),
       jsConfig: options.jsConfig && JSON.stringify(options.jsConfig),
       env: options.env && rustifyEnv(options.env),
       defineEnv: options.defineEnv,
@@ -810,7 +811,7 @@ function bindingToApi(binding: any, _wasm: boolean) {
       this._nativeProject = nativeProject
     }
 
-    async update(options: ProjectOptions) {
+    async update(options: Partial<ProjectOptions>) {
       await withErrorCause(async () =>
         binding.projectUpdate(
           this._nativeProject,
@@ -1037,7 +1038,8 @@ function bindingToApi(binding: any, _wasm: boolean) {
   }
 
   async function serializeNextConfig(
-    nextConfig: NextConfigComplete
+    nextConfig: NextConfigComplete,
+    projectPath: string
   ): Promise<string> {
     let nextConfigSerializable = nextConfig as any
 
@@ -1073,6 +1075,12 @@ function bindingToApi(binding: any, _wasm: boolean) {
           )
         : undefined
 
+    // loaderFile is an absolute path, we need it to be relative for turbopack.
+    if (nextConfig.images.loaderFile) {
+      nextConfig.images.loaderFile =
+        './' + path.relative(projectPath, nextConfig.images.loaderFile)
+    }
+
     return JSON.stringify(nextConfigSerializable, null, 2)
   }