update

download.js

@@ -0,0 +1,30 @@
+// Download electron prebuild tarball via node (follows redirects)
+const https = require('https');
+const fs = require('fs');
+const path = require('path');
+
+const url = process.argv[2];
+const out = process.argv[3];
+
+function download(u, cb) {
+  https.get(u, { headers: { 'User-Agent': 'node' } }, (res) => {
+    if ([301, 302, 303, 307, 308].includes(res.statusCode)) {
+      return download(res.headers.location, cb);
+    }
+    if (res.statusCode !== 200) {
+      return cb(new Error('HTTP ' + res.statusCode));
+    }
+    const ws = fs.createWriteStream(out);
+    res.pipe(ws);
+    ws.on('finish', () => ws.close(() => cb(null)));
+    ws.on('error', cb);
+  }).on('error', cb);
+}
+
+download(url, (err) => {
+  if (err) {
+    console.error('download failed:', err.message);
+    process.exit(1);
+  }
+  console.log('downloaded:', out, fs.statSync(out).size, 'bytes');
+});