usage: rush scan [-h] The NPM system allows a project to import dependencies without explicitly listing them in its package.json file. This is a dangerous practice, because there is no guarantee you will get a compatible version. The "rush scan" command reports a list of packages that are imported by your code, which you can compare against your package.json file to find mistakes. It searches the "./src" and "./lib" folders for typical import syntaxes such as "import __ from '__'", "require('__')", "System.import('__'), etc. The results are only approximate, but generally pretty accurate. Optional arguments: -h, --help Show this help message and exit.