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);

if (process.env.TRAVIS && !purgeIfStale) {
  process.exit(0);
}

// 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
var nodeModulesOK = checkNpm(true, purgeIfStale);

process.exit( nodeModulesOK || purgeIfStale ? 0 : 1);