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const Module = require('module')
const path = require('path')
const semver = require('semver')
// https://github.com/benmosher/eslint-plugin-import/pull/1591
// https://github.com/benmosher/eslint-plugin-import/pull/1602
// Polyfill Node's `Module.createRequireFromPath` if not present (added in Node v10.12.0)
// Use `Module.createRequire` if available (added in Node v12.2.0)
const createRequire = Module.createRequire || Module.createRequireFromPath || function (filename) {
const mod = new Module(filename, null)
mod.filename = filename
mod.paths = Module._nodeModulePaths(path.dirname(filename))
mod._compile(`module.exports = require;`, filename)
return mod.exports
}
function resolveFallback (request, options) {
const isMain = false
const fakeParent = new Module('', null)
const paths = []
for (let i = 0; i < options.paths.length; i++) {
const p = options.paths[i]
fakeParent.paths = Module._nodeModulePaths(p)
const lookupPaths = Module._resolveLookupPaths(request, fakeParent, true)
if (!paths.includes(p)) paths.push(p)
for (let j = 0; j < lookupPaths.length; j++) {
if (!paths.includes(lookupPaths[j])) paths.push(lookupPaths[j])
}
}
const filename = Module._findPath(request, paths, isMain)
if (!filename) {
const err = new Error(`Cannot find module '${request}'`)
err.code = 'MODULE_NOT_FOUND'
throw err
}
return filename
}
const resolve = semver.satisfies(process.version, '>=10.0.0')
? require.resolve
: resolveFallback
exports.resolveModule = function (request, context) {
let resolvedPath
try {
try {
resolvedPath = createRequire(path.resolve(context, 'package.json')).resolve(request)
} catch (e) {
resolvedPath = resolve(request, { paths: [context] })
}
} catch (e) {}
return resolvedPath
}
exports.loadModule = function (request, context, force = false) {
// createRequire doesn't work with jest mock modules
// (which we used in migrator for inquirer, and in tests for cli-service)
// TODO: it's supported in Jest 25
if (process.env.VUE_CLI_TEST && (request.endsWith('migrator') || context === '/')) {
return require(request)
}
try {
return createRequire(path.resolve(context, 'package.json'))(request)
} catch (e) {
const resolvedPath = exports.resolveModule(request, context)
if (resolvedPath) {
if (force) {
clearRequireCache(resolvedPath)
}
return require(resolvedPath)
}
}
}
exports.clearModule = function (request, context) {
const resolvedPath = exports.resolveModule(request, context)
if (resolvedPath) {
clearRequireCache(resolvedPath)
}
}
function clearRequireCache (id, map = new Map()) {
const module = require.cache[id]
if (module) {
map.set(id, true)
// Clear children modules
module.children.forEach(child => {
if (!map.get(child.id)) clearRequireCache(child.id, map)
})
delete require.cache[id]
}
}
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