Function upgradeWindowsBundle

src/upgrade/index.ts:607–630

(
  method: Extract<InstallMethod, { kind: 'bundle' }>,
  latest: string,
  deps: UpgradeDeps
)

}

function upgradeWindowsBundle(
  method: Extract<InstallMethod, { kind: 'bundle' }>,
  latest: string,
  deps: UpgradeDeps
): number {
  const arch = process.arch === 'arm64' ? 'arm64' : 'x64';
  const script = buildWindowsUpgradeScript(method.bundleRoot, latest, arch);
  // -EncodedCommand (base64 UTF-16LE), NOT -Command: Node's Windows argv→command
  // -line quoting mangles a long multi-statement script, so PowerShell never
  // parses it. Encoding sidesteps all shell quoting — the canonical approach.
  const encoded = Buffer.from(script, 'utf16le').toString('base64');
  deps.log(c.dim(`Downloading and installing ${latest}…`));
  const code = deps.run('powershell.exe', ['-NoProfile', '-ExecutionPolicy', 'Bypass', '-EncodedCommand', encoded]);
  if (code !== 0) {
    deps.error(`Installer exited with code ${code}.`);
    return 1;
  }
  deps.log('');
  // The running node.exe was renamed aside, so the version probe in
  // runUpgrade already exercises the NEW binary — no terminal hedge needed.
  deps.log(c.green('✓ Upgrade complete.'));
  deps.log(reindexAdvisory());
  return 0;
}

/**
 * How to invoke npm. On Windows npm is a .cmd batch file, which Node refuses