fix(turbopack): correct __dirname and __filename in CJS modules

turbopack/crates/turbopack-core/src/compile_time_info.rs

@@ -227,6 +227,14 @@ pub enum InputRelativeConstant {
     FileName,
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, TraceRawVcs, NonLocalValue)]
+pub enum CjsPathConstant {
+    // The project relative directory name of the source file
+    DirName,
+    // The project relative file name of the source file.
+    FileName,
+}
+
 #[turbo_tasks::value]
 #[derive(Debug, Clone)]
 pub enum FreeVarReference {
@@ -239,6 +247,7 @@ pub enum FreeVarReference {
     Member(RcStr, RcStr),
     Value(CompileTimeDefineValue),
     InputRelative(InputRelativeConstant),
+    CjsPath(CjsPathConstant),
     Error(RcStr),
 }
 

turbopack/crates/turbopack-ecmascript/src/references/mod.rs

@@ -1555,9 +1555,15 @@ async fn compile_time_info_for_module_options(
         .or_insert(rcstr!("string").into());
     free_var_references
         .entry(vec![DefinableNameSegment::Name(dir_name)])
-        .or_insert(FreeVarReference::InputRelative(
-            InputRelativeConstant::DirName,
-        ));
+        .or_insert(if is_esm {
+            FreeVarReference::InputRelative(
+                InputRelativeConstant::DirName,
+            )
+        } else {
+            FreeVarReference::CjsPath(
+                CjsPathConstant::DirName,
+            )
+        });
     let file_name = rcstr!("__filename");
 
     free_var_references
@@ -1568,9 +1574,15 @@ async fn compile_time_info_for_module_options(
         .or_insert(rcstr!("string").into());
     free_var_references
         .entry(vec![DefinableNameSegment::Name(file_name)])
-        .or_insert(FreeVarReference::InputRelative(
-            InputRelativeConstant::FileName,
-        ));
+        .or_insert(if is_esm {
+            FreeVarReference::InputRelative(
+                InputRelativeConstant::FileName,
+            )
+        } else {
+            FreeVarReference::CjsPath(
+                CjsPathConstant::FileName,
+            )
+        });
 
     // Compiletime rewrite the nodejs `global` to `__turbopack_context_.g` which is a shortcut for
     // `globalThis` that cannot be shadowed by a local variable.
@@ -2897,6 +2909,17 @@ async fn handle_free_var_reference(
                 ast_path.to_vec().into(),
             ));
         }
+        FreeVarReference::CjsPath(kind) => {
+            let source_path = state.origin.origin_path().owned().await?;
+            let source_path = match kind {
+                CjsPathConstant::DirName => source_path.parent(),
+                CjsPathConstant::FileName => source_path,
+            };
+            analysis.add_code_gen(ConstantValueCodeGen::new(
+                as_abs_path(source_path).into(),
+                ast_path.to_vec().into(),
+            ));
+        }
     }
     Ok(true)
 }