fix(es/config): Respect .swcrc (#4735)

crates/swc/src/config/mod.rs

@@ -986,17 +986,6 @@ impl Config {
     ///
     /// - typescript: `tsx` will be modified if file extension is `ts`.
     pub fn adjust(&mut self, file: &Path) {
-        if self.jsc.syntax.is_none() || matches!(self.jsc.syntax, Some(Syntax::Es(..))) {
-            if file.extension() == Some("ts".as_ref()) {
-                self.jsc.syntax = Some(Syntax::Typescript(TsConfig::default()));
-            } else if file.extension() == Some("tsx".as_ref()) {
-                self.jsc.syntax = Some(Syntax::Typescript(TsConfig {
-                    tsx: true,
-                    ..Default::default()
-                }));
-            }
-        }
-
         if let Some(Syntax::Typescript(TsConfig { tsx, dts, .. })) = &mut self.jsc.syntax {
             let is_dts = file
                 .file_name()

crates/swc/tests/fixture/deno/paths/issue-2753/2-cjs/output/src/command/restore.ts

@@ -1,4 +1,2 @@
 "use strict";
-Object.defineProperty(exports, "__esModule", {
-    value: true
-});
+var _config = require("../config");

crates/swc/tests/fixture/deno/paths/issue-2753/2-esm/output/src/command/restore.ts

@@ -1 +1 @@
-export { };
+import { module } from "../config";

crates/swc/tests/fixture/issues-1xxx/1165/case1/output/index.ts

@@ -1,2 +1,4 @@
+import something from "../module_with_default_export.js"; /* This!? */ 
+import { something_else } from "http://bonzo.com/mod"; // There?
 /* Hello! */ export * from "./stuff.js";
 /* Maybe like this? */ let _var; // Or so?

crates/swc/tests/fixture/issues-1xxx/1279/case1/output/index.ts

@@ -1,9 +1,10 @@
+import * as swcHelpers from "@swc/helpers";
 export class Foo {
     nested() {
         let Foo1 = class Foo {
         };
-        Foo1.foo = "foo";
-        Foo1.bar = Foo1.foo;
+        swcHelpers.defineProperty(Foo1, "foo", "foo");
+        swcHelpers.defineProperty(Foo1, "bar", Foo1.foo);
         return new Foo1();
     }
 }

node-swc/__tests__/transform/issue_4621_test.mjs

@@ -5,7 +5,7 @@ import { fileURLToPath } from "url";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 
-it("should auto-detect tsx", async () => {
+it("should allow using tsx", async () => {
     const filename = join(
         __dirname,
         "..",
@@ -21,6 +21,7 @@ it("should auto-detect tsx", async () => {
             target: "es5",
             parser: {
                 syntax: "typescript",
+                tsx: true
             },
         },
     });
@@ -35,7 +36,7 @@ export default function foo() {
 `);
 });
 
-it("should auto-detect tsx even with no parser option", async () => {
+it("should respect .swcrc without parser option", async () => {
     const filename = join(
         __dirname,
         "..",

node-swc/__tests__/transform/issue_4734_test.mjs

@@ -0,0 +1,38 @@
+import swc from "../../..";
+import { dirname, join } from "path";
+import { platform } from "os";
+import { fileURLToPath } from "url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+it("should transpile decorators", async () => {
+    const filename = join(
+        __dirname,
+        "..",
+        "..",
+        "tests",
+        "issue-4734",
+        "1",
+        "index.ts"
+    );
+    console.log(filename);
+    const { code } = await swc.transformFile(filename, {});
+    expect(code).toMatchInlineSnapshot(`
+        "var __decorate = this && this.__decorate || function(decorators, target, key, desc) {
+            var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+            if (typeof Reflect === \\"object\\" && typeof Reflect.decorate === \\"function\\") r = Reflect.decorate(decorators, target, key, desc);
+            else for(var i = decorators.length - 1; i >= 0; i--)if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+            return c > 3 && r && Object.defineProperty(target, key, r), r;
+        };
+        class TestClass {
+            abc() {}
+        }
+        __decorate([
+            foo
+        ], TestClass.prototype, \\"abc\\", null);
+        function foo(target, propertyKey) {
+            console.log(\`Decorating \${target}.\${String(propertyKey)}\`);
+        }
+        "
+    `);
+});

node-swc/tests/issue-4621/1/.swcrc

@@ -1,6 +1,10 @@
 {
     "jsc": {
         "target": "es2017",
+        "parser": {
+            "syntax": "typescript",
+            "tsx": true
+        },
         "transform": {
             "react": {
                 "runtime": "automatic"

node-swc/tests/issue-4734/1/.swcrc

@@ -0,0 +1,12 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "decorators": true
+        },
+        "transform": {
+            "legacyDecorator": true
+        },
+        "target": "es2020"
+    }
+}

node-swc/tests/issue-4734/1/index.ts

@@ -0,0 +1,8 @@
+class TestClass {
+    @foo
+    abc() { }
+}
+
+function foo(target: unknown, propertyKey: string | symbol) {
+    console.log(`Decorating ${target}.${String(propertyKey)}`)
+}