Turbopack dev/build: Ignore empty tsconfig/jsconfig (#69795)

Fixes two tests for tsconfig/jsconfig being empty.

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test/turbopack-build-tests-manifest.json

@@ -12686,10 +12686,10 @@
       "runtimeError": false
     },
     "test/integration/jsconfig-empty/test/index.test.js": {
-      "passed": [],
-      "failed": [
+      "passed": [
         "Empty JSConfig Support production mode should compile successfully"
       ],
+      "failed": [],
       "pending": [],
       "flakey": [],
       "runtimeError": false
@@ -15264,11 +15264,10 @@
         "tsconfig.json verifier allows you to set target mode",
         "tsconfig.json verifier allows you to set verbatimModuleSyntax true via extends without adding isolatedModules",
         "tsconfig.json verifier allows you to set verbatimModuleSyntax true without adding isolatedModules",
-        "tsconfig.json verifier creates compilerOptions when you extend another config"
-      ],
-      "failed": [
+        "tsconfig.json verifier creates compilerOptions when you extend another config",
         "tsconfig.json verifier Works with an empty tsconfig.json (docs)"
       ],
+      "failed": [],
       "pending": [
         "tsconfig.json verifier allows you to skip moduleResolution, esModuleInterop and resolveJsonModule when using \"module: preserve\""
       ],

turbopack/crates/turbopack-resolve/src/typescript.rs

@@ -53,6 +53,13 @@ pub async fn read_tsconfigs(
     let mut configs = Vec::new();
     let resolve_options = json_only(resolve_options);
     loop {
+        // tsc ignores empty config files.
+        if let FileContent::Content(file) = &*data.await? {
+            if file.content().is_empty() {
+                break;
+            }
+        }
+
         let parsed_data = data.parse_json_with_comments();
         match &*parsed_data.await? {
             FileJsonContent::Unparseable(e) => {