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peertube/server/helpers/decache.ts

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TypeScript
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// Thanks: https://github.com/dwyl/decache
// We reuse this file to also uncache plugin base path
import { extname } from 'path'
function decachePlugin (pluginPath: string, libraryPath: string) {
const moduleName = find(libraryPath)
if (!moduleName) return
searchCache(moduleName, function (mod) {
delete require.cache[mod.id]
})
removeCachedPath(pluginPath)
}
function decacheModule (name: string) {
const moduleName = find(name)
if (!moduleName) return
searchCache(moduleName, function (mod) {
delete require.cache[mod.id]
})
removeCachedPath(moduleName)
}
// ---------------------------------------------------------------------------
export {
decacheModule,
decachePlugin
}
// ---------------------------------------------------------------------------
function find (moduleName: string) {
try {
return require.resolve(moduleName)
} catch {
return ''
}
}
function searchCache (moduleName: string, callback: (current: NodeModule) => void) {
const resolvedModule = require.resolve(moduleName)
let mod: NodeModule
const visited = {}
if (resolvedModule && ((mod = require.cache[resolvedModule]) !== undefined)) {
// Recursively go over the results
(function run (current) {
visited[current.id] = true
current.children.forEach(function (child) {
if (extname(child.filename) !== '.node' && !visited[child.id]) {
run(child)
}
})
// Call the specified callback providing the
// found module
callback(current)
})(mod)
}
};
function removeCachedPath (pluginPath: string) {
const pathCache = (module.constructor as any)._pathCache
Object.keys(pathCache).forEach(function (cacheKey) {
if (cacheKey.includes(pluginPath)) {
delete pathCache[cacheKey]
}
})
}