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1'use strict'2const { inspect } = require('util')3 4// adapted from node's internal/errors5// https://github.com/nodejs/node/blob/c8a04049/lib/internal/errors.js6 7// close copy of node's internal SystemError class.8class SystemError {9  constructor (code, prefix, context) {10    // XXX context.code is undefined in all constructors used in cp/polyfill11    // that may be a bug copied from node, maybe the constructor should use12    // `code` not `errno`?  nodejs/node#4110413    let message = `${prefix}: ${context.syscall} returned ` +14                  `${context.code} (${context.message})`15 16    if (context.path !== undefined) {17      message += ` ${context.path}`18    }19    if (context.dest !== undefined) {20      message += ` => ${context.dest}`21    }22 23    this.code = code24    Object.defineProperties(this, {25      name: {26        value: 'SystemError',27        enumerable: false,28        writable: true,29        configurable: true,30      },31      message: {32        value: message,33        enumerable: false,34        writable: true,35        configurable: true,36      },37      info: {38        value: context,39        enumerable: true,40        configurable: true,41        writable: false,42      },43      errno: {44        get () {45          return context.errno46        },47        set (value) {48          context.errno = value49        },50        enumerable: true,51        configurable: true,52      },53      syscall: {54        get () {55          return context.syscall56        },57        set (value) {58          context.syscall = value59        },60        enumerable: true,61        configurable: true,62      },63    })64 65    if (context.path !== undefined) {66      Object.defineProperty(this, 'path', {67        get () {68          return context.path69        },70        set (value) {71          context.path = value72        },73        enumerable: true,74        configurable: true,75      })76    }77 78    if (context.dest !== undefined) {79      Object.defineProperty(this, 'dest', {80        get () {81          return context.dest82        },83        set (value) {84          context.dest = value85        },86        enumerable: true,87        configurable: true,88      })89    }90  }91 92  toString () {93    return `${this.name} [${this.code}]: ${this.message}`94  }95 96  [Symbol.for('nodejs.util.inspect.custom')] (_recurseTimes, ctx) {97    return inspect(this, {98      ...ctx,99      getters: true,100      customInspect: false,101    })102  }103}104 105function E (code, message) {106  module.exports[code] = class NodeError extends SystemError {107    constructor (ctx) {108      super(code, message, ctx)109    }110  }111}112 113E('ERR_FS_CP_DIR_TO_NON_DIR', 'Cannot overwrite directory with non-directory')114E('ERR_FS_CP_EEXIST', 'Target already exists')115E('ERR_FS_CP_EINVAL', 'Invalid src or dest')116E('ERR_FS_CP_FIFO_PIPE', 'Cannot copy a FIFO pipe')117E('ERR_FS_CP_NON_DIR_TO_DIR', 'Cannot overwrite non-directory with directory')118E('ERR_FS_CP_SOCKET', 'Cannot copy a socket file')119E('ERR_FS_CP_SYMLINK_TO_SUBDIRECTORY', 'Cannot overwrite symlink in subdirectory of self')120E('ERR_FS_CP_UNKNOWN', 'Cannot copy an unknown file type')121E('ERR_FS_EISDIR', 'Path is a directory')122 123module.exports.ERR_INVALID_ARG_TYPE = class ERR_INVALID_ARG_TYPE extends Error {124  constructor (name, expected, actual) {125    super()126    this.code = 'ERR_INVALID_ARG_TYPE'127    this.message = `The ${name} argument must be ${expected}. Received ${typeof actual}`128  }129}130