angular/tools/npm/check-node-modules.js at examples · JavaScript-Resource/angular

Repository navigation

"use strict";

var fs = require('fs');

var path = require('path');

var NPM_SHRINKWRAP_FILE = 'npm-shrinkwrap.json';

var NPM_SHRINKWRAP_CACHED_FILE = 'node_modules/npm-shrinkwrap.cached.json';

var FS_OPTS = {encoding: 'utf-8'};

var PROJECT_ROOT = path.join(__dirname, '../../');

function checkNodeModules(logOutput, purgeIfStale) {

var nodeModulesOK = _checkCache(NPM_SHRINKWRAP_FILE, NPM_SHRINKWRAP_CACHED_FILE);

if (nodeModulesOK) {

if (logOutput) console.log(':-) npm dependencies are looking good!');

} else {

if (logOutput) console.error(':-( npm dependencies are stale or in an in unknown state!');

if (purgeIfStale) {

if (logOutput) console.log(' purging...');

var nodeModulesPath = path.join(PROJECT_ROOT, 'node_modules');

if (fs.existsSync(nodeModulesPath)) {

// lazy-load fs-extra

var fse = require('fs-extra');

fse.removeSync(nodeModulesPath);

}

return nodeModulesOK;

}

function _checkCache(markerFile, cacheMarkerFile) {

var absoluteMarkerFilePath = path.join(PROJECT_ROOT, markerFile);

var absoluteCacheMarkerFilePath = path.join(PROJECT_ROOT, cacheMarkerFile);

if (!fs.existsSync(absoluteCacheMarkerFilePath)) return false;

var markerContent = fs.readFileSync(absoluteMarkerFilePath, FS_OPTS);

var cacheMarkerContent = fs.readFileSync(absoluteCacheMarkerFilePath, FS_OPTS);

return markerContent == cacheMarkerContent;

}

module.exports = checkNodeModules;