| // 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 | |