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

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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
'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...');
_deleteDir(path.join(PROJECT_ROOT, 'node_modules'));
}
}
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;
}
/**
* Custom implementation of recursive `rm` because we can't rely on the state of node_modules to
* pull in existing module.
*/
function _deleteDir(path) {
if (fs.existsSync(path)) {
var subpaths = fs.readdirSync(path);
subpaths.forEach(function(subpath) {
var curPath = path + '/' + subpath;
if (fs.lstatSync(curPath).isDirectory()) {
_deleteDir(curPath);
} else {
fs.unlinkSync(curPath);
}
});
fs.rmdirSync(path);
}
}
module.exports = checkNodeModules;