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validate-lockfile.js1023 B · 30 lines
// compares the inventory of package items in the tree// that is about to be installed (idealTree) with the inventory// of items stored in the package-lock file (virtualTree)//// Returns empty array if no errors found or an array populated// with an entry for each validation error found.function validateLockfile (virtualTree, idealTree) {  const errors = []   // loops through the inventory of packages resulted by ideal tree,  // for each package compares the versions with the version stored in the  // package-lock and adds an error to the list in case of mismatches  for (const [key, entry] of idealTree.entries()) {    const lock = virtualTree.get(key)     if (!lock) {      errors.push(`Missing: ${entry.name}@${entry.version} from lock file`)      continue    }     if (entry.version !== lock.version) {      errors.push(`Invalid: lock file's ${lock.name}@${lock.version} does ` +      `not satisfy ${entry.name}@${entry.version}`)    }  }  return errors} module.exports = validateLockfile