Function getAvailableMemoryMb

packages/cli/src/telemetry/system.ts:174–213

()

 * correct value via `MemAvailable` in /proc/meminfo.
 */
export function getAvailableMemoryMb(): number {
  const fallback = bytesToMb(freemem());

  if (platform() === "darwin") {
    try {
      const raw = execSync("vm_stat", { encoding: "utf-8", timeout: 5000 });
      const pageSize = parseInt(raw.match(/page size of (\d+)/)?.[1] ?? "0", 10);
      if (!pageSize) return fallback;

      const pages = (key: string) =>
        parseInt(raw.match(new RegExp(`${key}:\\s+(\\d+)`))?.[1] ?? "0", 10);

      const available =
        (pages("Pages free") +
          pages("Pages inactive") +
          pages("Pages purgeable") +
          pages("Pages speculative")) *
        pageSize;

      return available > 0 ? bytesToMb(available) : fallback;
    } catch {
      return fallback;
    }
  }

  if (platform() === "linux") {
    try {
      const meminfo = readFileSync("/proc/meminfo", "utf-8");
      const match = meminfo.match(/MemAvailable:\s+(\d+)\s+kB/);
      if (match) {
        return Math.trunc(parseInt(match[1]!, 10) / 1024);
      }
      return fallback;
    } catch {
      return fallback;
    }
  }

  return fallback;
}