Fix rustup installation on Windows

lib/main.js

@@ -17,12 +17,11 @@ var __importStar = (this && this.__importStar) || function (mod) {
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(require("@actions/core"));
 const rustup = __importStar(require("./rustup"));
-const os = __importStar(require("os"));
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
             const version = core.getInput('rust-version');
-            if (version && os.platform() != 'win32') {
+            if (version) {
                 yield rustup.install(version);
             }
         }

lib/rustup.js

@@ -35,7 +35,6 @@ function install(version) {
         }
         toolPath = path.join(toolPath, 'bin');
         core.addPath(toolPath);
-        yield exec.exec('rustup', ['update']);
     });
 }
 exports.install = install;
@@ -50,17 +49,13 @@ function acquireRust(version) {
             throw `Failed to download rustup: ${error}`;
         }
         if (WINDOWS) {
-            // TODO: Fix this
-            // It currently fails with:
-            // error: 'rustup-init.exe' is not installed for the toolchain 'stable-x86_64-pc-windows-msvc'
             yield io.cp(script, script + '.exe');
             script += '.exe';
-            const powershell = yield io.which('powershell', true);
+            console.log(yield io.which('rustup', true));
             yield exec.exec(`"${script}"`, [
-                '--default-host',
-                'gnu',
+                '-y',
                 '--default-toolchain',
-                version,
+                'none',
             ]);
         }
         else {
@@ -72,7 +67,7 @@ function acquireRust(version) {
 }
 function rustupUrl() {
     if (WINDOWS) {
-        return "https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-gnu/rustup-init.exe";
+        return "https://win.rustup.rs";
     }
     else {
         return "https://sh.rustup.rs";