fix: attaching inline source map into module code when inspect is enabled (#356)

* stamp: attaching inline source map into module code when inspect is enabled

* stamp(sb_module_loader): add dependency

* chore: update `Cargo.lock`

Author: nyannyacha

Cargo.lock

@@ -366,6 +366,7 @@ impl DenoRuntime {
             eszip,
             maybe_arc_import_map,
             import_map_path,
+            maybe_inspector.is_some(),
         )
         .await?;
 

crates/base/src/deno_runtime.rs

@@ -24,6 +24,7 @@ deno_npm.workspace = true
 once_cell.workspace = true
 deno_tls.workspace = true
 monch.workspace = true
+base64.workspace = true
 sb_core = { version = "0.1.0", path = "../sb_core" }
 sb_node = { version = "0.1.0", path = "../node" }
 sb_npm = { version = "0.1.0", path = "../npm" }

crates/sb_module_loader/Cargo.toml

@@ -57,6 +57,7 @@ pub async fn create_module_loader_for_eszip(
     mut eszip: eszip::EszipV2,
     metadata: Metadata,
     maybe_import_map: Option<ImportMap>,
+    include_source_map: bool,
 ) -> Result<RuntimeProviders, AnyError> {
     // let main_module = &metadata.entrypoint;
     let current_exe_path = std::env::current_exe().unwrap();
@@ -191,6 +192,7 @@ pub async fn create_module_loader_for_eszip(
     Ok(RuntimeProviders {
         module_loader: Rc::new(EmbeddedModuleLoader {
             shared: module_loader_factory.shared.clone(),
+            include_source_map,
         }),
         npm_resolver: npm_resolver.into_npm_resolver(),
         vfs,
@@ -205,6 +207,7 @@ pub async fn create_module_loader_for_standalone_from_eszip_kind(
     eszip_payload_kind: EszipPayloadKind,
     maybe_import_map_arc: Option<Arc<ImportMap>>,
     maybe_import_map_path: Option<String>,
+    include_source_map: bool,
 ) -> Result<RuntimeProviders, AnyError> {
     let eszip = payload_to_eszip(eszip_payload_kind).await;
 
@@ -233,6 +236,7 @@ pub async fn create_module_loader_for_standalone_from_eszip_kind(
             package_json_deps: None,
         },
         maybe_import_map,
+        include_source_map,
     )
     .await
 }

crates/sb_module_loader/standalone/mod.rs

@@ -1,6 +1,7 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use crate::node::node_module_loader::NpmModuleLoader;
+use base64::Engine;
 use deno_ast::MediaType;
 use deno_core::error::generic_error;
 use deno_core::error::type_error;
@@ -28,6 +29,7 @@ pub struct SharedModuleLoaderState {
 #[derive(Clone)]
 pub struct EmbeddedModuleLoader {
     pub(crate) shared: Arc<SharedModuleLoaderState>,
+    pub(crate) include_source_map: bool,
 }
 
 impl ModuleLoader for EmbeddedModuleLoader {
@@ -101,6 +103,7 @@ impl ModuleLoader for EmbeddedModuleLoader {
         _is_dynamic: bool,
         _requested_module_type: RequestedModuleType,
     ) -> deno_core::ModuleLoadResponse {
+        let include_source_map = self.include_source_map;
         let permissions = sb_node::allow_all();
 
         if original_specifier.scheme() == "data" {
@@ -155,11 +158,36 @@ impl ModuleLoader for EmbeddedModuleLoader {
 
         deno_core::ModuleLoadResponse::Async(
             async move {
-                let code = module.source().await.ok_or_else(|| {
-                    type_error(format!("Module not found: {}", original_specifier))
-                })?;
-                let code = arc_u8_to_arc_str(code)
-                    .map_err(|_| type_error("Module source is not utf-8"))?;
+                let code = module
+                    .source()
+                    .await
+                    .ok_or_else(|| type_error(format!("Module not found: {}", original_specifier)))
+                    .and_then(|it| {
+                        arc_u8_to_arc_str(it).map_err(|_| type_error("Module source is not utf-8"))
+                    })?;
+
+                let source_map = module.source_map().await;
+                let maybe_code_with_source_map = 'scope: {
+                    if !include_source_map {
+                        break 'scope code;
+                    }
+
+                    let Some(source_map) = source_map else {
+                        break 'scope code;
+                    };
+
+                    let mut src = code.to_string();
+
+                    if src.ends_with('\n') {
+                        src.push('\n');
+                    }
+
+                    src.push_str("//# sourceMappingURL=data:application/json;base64,");
+                    base64::prelude::BASE64_STANDARD.encode_string(source_map, &mut src);
+
+                    Arc::from(src)
+                };
+
                 Ok(deno_core::ModuleSource::new_with_redirect(
                     match module.kind {
                         eszip::ModuleKind::JavaScript => ModuleType::JavaScript,
@@ -171,7 +199,7 @@ impl ModuleLoader for EmbeddedModuleLoader {
                             unreachable!();
                         }
                     },
-                    ModuleSourceCode::String(code.into()),
+                    ModuleSourceCode::String(maybe_code_with_source_map.into()),
                     &original_specifier,
                     &found_specifier,
                 ))