angular-docs-cn/tools/npm/check-node-modules

#!/usr/bin/env node

var checkNpm = require('./check-node-modules.js');

var purgeIfStale = (process.argv.indexOf('--purge') !== -1);

// check-node-modules will exit(1) if we don't need to install to short-circuit `npm install`
// see .travis.yml's `install` block to see the reason for this
process.exit(checkNpm(true, purgeIfStale) ? 1 : 0);