execli/lib/get-cpu-count.js

Generate task-oriented CLIs declaratively

import { cpus } from "node:os";
import { env } from "node:process";
export const getCpuCount = () => {
    const cpuCountFromEnv = env.VCPU_COUNT;
    if (!cpuCountFromEnv) {
        return cpus().length;
    }
    const convertedCpuCountFromEnv = Number(cpuCountFromEnv);
    if (Number.isNaN(convertedCpuCountFromEnv)) {
        throw new TypeError(`Expected a number but got \`${cpuCountFromEnv}\`.`);
    }
    if (!Number.isInteger(convertedCpuCountFromEnv) ||
        convertedCpuCountFromEnv <= 0) {
        throw new TypeError(`Expected a positive integer but got \`${convertedCpuCountFromEnv}\`.`);
    }
    return convertedCpuCountFromEnv;
};
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