fix: restore webcontainer-fallback.js for Stackblitz support (#787)

Author: Boshen

napi/webcontainer-fallback.js

@@ -0,0 +1,23 @@
+const fs = require('node:fs');
+const childProcess = require('node:child_process');
+
+const pkg = JSON.parse(
+  fs.readFileSync(require.resolve('oxc-resolver/package.json'), 'utf-8'),
+);
+const version = pkg.version;
+const baseDir = `/tmp/oxc-resolver-${version}`;
+const bindingEntry = `${baseDir}/node_modules/@oxc-resolver/binding-wasm32-wasi/resolver.wasi.cjs`;
+
+if (!fs.existsSync(bindingEntry)) {
+  fs.rmSync(baseDir, { recursive: true, force: true });
+  fs.mkdirSync(baseDir, { recursive: true });
+  const bindingPkg = `@oxc-resolver/binding-wasm32-wasi@${version}`;
+  // eslint-disable-next-line: no-console
+  console.log(`[oxc-resolver] Downloading ${bindingPkg} on WebContainer...`);
+  childProcess.execFileSync('pnpm', ['i', bindingPkg], {
+    cwd: baseDir,
+    stdio: 'inherit',
+  });
+}
+
+module.exports = require(bindingEntry);