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55 lines (49 loc) · 1.34 KB
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Copy pathutils.js
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55 lines (49 loc) · 1.34 KB
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'use strict';
const _ = require('lodash');
const BbPromise = require('bluebird');
function guid() {
function s4() {
return Math.floor((1 + Math.random()) * 0x10000)
.toString(16)
.substring(1);
}
return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
}
/**
* Remove the specified module from the require cache.
* @param {string} moduleName
*/
function purgeCache(moduleName) {
return searchAndProcessCache(moduleName, function (mod) {
delete require.cache[mod.id];
})
.then(() => {
_.forEach(_.keys(module.constructor._pathCache), function(cacheKey) {
if (cacheKey.indexOf(moduleName)>0) {
delete module.constructor._pathCache[cacheKey];
}
});
return BbPromise.resolve();
});
}
function searchAndProcessCache(moduleName, processor) {
let mod_src = require.resolve(moduleName);
const visitedModules = [];
if (mod_src && ((mod_src = require.cache[mod_src]) !== undefined)) {
const modStack = [mod_src];
while (!_.isEmpty(modStack)) {
const mod = modStack.pop();
if (!_.includes(visitedModules, mod)) {
visitedModules.push(mod);
Array.prototype.push.apply(modStack, mod.children);
processor(mod);
}
}
}
return BbPromise.resolve();
}
module.exports = {
guid,
purgeCache,
searchAndProcessCache,
};