binding: support typescript

packages/binding/package.json

@@ -25,6 +25,7 @@
   "peerDependencies": {
     "@ruby/head-wasm-wasi": "2.3",
     "@ruby/wasm-wasi": "2.3",
+    "@swc/core": "1.3",
     "primate": "0.27",
     "pyodide": "0.24"
   },
@@ -35,6 +36,9 @@
     "@ruby/wasm-wasi": {
       "optional": true
     },
+    "swc/core" :{
+      "optional": true
+    },
     "pyodide": {
       "optional": true
     }

packages/binding/src/bindings/exports.js

@@ -1,3 +1,4 @@
 export { default as go } from "./go/module.js";
 export { default as python } from "./python/module.js";
 export { default as ruby } from "./ruby/module.js";
+export { default as typescript } from "./typescript/module.js";

packages/binding/src/bindings/typescript/imports.js

@@ -0,0 +1,15 @@
+import swc from "@swc/core";
+
+const options = {
+  jsc: {
+    parser: {
+      syntax: "typescript",
+    },
+    target: "esnext",
+  },
+};
+
+
+const transform = code => swc.transform(code, options);
+
+export default async code => (await transform(code)).code;

packages/binding/src/bindings/typescript/module.js

@@ -0,0 +1,34 @@
+import { filter } from "rcompat/object";
+import { peers } from "../common/exports.js";
+import depend from "../depend.js";
+
+export default ({
+  extension = ".ts",
+} = {}) => {
+  const name = "typescript";
+  const dependencies = ["@swc/core"];
+  const on = filter(peers, ([key]) => dependencies.includes(key));
+  let transpile;
+
+  return {
+    name: `primate:${name}`,
+    async init(app, next) {
+      await depend(on, `binding:${name}`);
+
+      transpile = (await import("./imports.js")).default;
+
+      return next(app);
+    },
+    async stage(app, next) {
+      app.register(extension, {
+        route: async (directory, file) => {
+          const path = directory.join(file);
+          const base = path.directory;
+          const js = path.base.concat(".js");
+          await base.join(js).write((await transpile(await path.text())));
+        },
+      });
+      return next(app);
+    },
+  };
+};