Package manager check

index.js

const lockfileSpecs = [
  {
    checkfile: ".yarnrc.yml",
    lockfile: "yarn.lock",
    command: "yarn",
    version: "2",
    arguments: ["install", "--immutable"]
  },
  {
    checkfile: "yarn.lock",
    lockfile: "yarn.lock",
    command: "yarn",
    version: "1",
    arguments: ["install", "--prefer-offline", "--pure-lockfile"]
  },
  {
    checkfile: "package-lock.json",
    lockfile: "package-lock.json",
    command: "npm",
    version: ">=5",
    arguments: ["install", "--prefer-offline", "--no-audit", "--no-save"]
  },
  {
    checkfile: "npm-shrinkwrap.json",
    lockfile: "npm-shrinkwrap.json",
    command: "npm",
    version: "<5",
    arguments: ["install", "--prefer-offline", "--no-audit", "--no-save"]
  },
  {
    checkfile: "pnpm-lock.yaml",
    lockfile: "pnpm-lock.yaml",
    command: "pnpm",
    version: ">=3",
    arguments: ["install", "--prefer-offline", "--prefer-frozen-lockfile"]
  },
  {
    checkfile: "shrinkwrap.yaml",
    lockfile: "shrinkwrap.yaml",
    command: "pnpm",
    version: "<3",
    arguments: ["install", "--prefer-offline", "--prefer-frozen-shrinkwrap"]
  }
];