prepack/lib/intrinsics/node/fs.js

Execute a JS bundle, serialize global state and side effects to a snapshot that can be quickly restored.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.default = function (realm) {
  let intrinsicName = 'process.binding("fs")';
  let nativeFS = process.binding("fs");

  // fs
  let obj = new _index.ObjectValue(realm, realm.intrinsics.ObjectPrototype, intrinsicName);
  obj.defineNativeMethod("FSInitialize", 0, (context, args) => {
    // TODO: Implement the native implementation.
    return realm.intrinsics.undefined;
  });
  obj.defineNativeMethod("internalModuleStat", 0, (context, args) => {
    const fileName = _singletons.To.ToString(realm, args[0]);
    return new _index.NumberValue(realm, nativeFS.internalModuleStat(fileName));
  });
  obj.defineNativeMethod("lstat", 0, (context, args) => {
    const path = _singletons.To.ToString(realm, args[0]);
    (0, _invariant2.default)(args[1] instanceof _index.ObjectValue);
    const buffer = (0, _utils.getNodeBufferFromTypedArray)(realm, args[1]);
    const float64buffer = new Float64Array(buffer.buffer);
    nativeFS.lstat(path, float64buffer);
    return args[1];
  });
  obj.defineNativeMethod("fstat", 0, (context, args) => {
    const fd = _singletons.To.ToNumber(realm, args[0]);
    (0, _invariant2.default)(args[1] instanceof _index.ObjectValue);
    const buffer = (0, _utils.getNodeBufferFromTypedArray)(realm, args[1]);
    const float64buffer = new Float64Array(buffer.buffer);
    nativeFS.fstat(fd, float64buffer);
    return args[1];
  });
  obj.defineNativeMethod("open", 0, (context, args) => {
    const path = _singletons.To.ToString(realm, args[0]);
    const flags = _singletons.To.ToNumber(realm, args[1]);
    const mode = _singletons.To.ToNumber(realm, args[2]);
    const fd = nativeFS.open(path, flags, mode);
    return new _index.NumberValue(realm, fd);
  });
  obj.defineNativeMethod("close", 0, (context, args) => {
    const fd = _singletons.To.ToNumber(realm, args[0]);
    nativeFS.close(fd);
    return realm.intrinsics.undefined;
  });
  obj.defineNativeMethod("read", 0, (context, args) => {
    const fd = _singletons.To.ToNumber(realm, args[0]);
    (0, _invariant2.default)(args[1] instanceof _index.ObjectValue);
    const buffer = (0, _utils.getNodeBufferFromTypedArray)(realm, args[1]);
    const offset = _singletons.To.ToNumber(realm, args[2]);
    const length = _singletons.To.ToNumber(realm, args[3]);
    const position = args[4] === realm.intrinsics.undefined ? undefined : _singletons.To.ToNumber(realm, args[4]);
    const bytesRead = nativeFS.read(fd, buffer, offset, length, position);
    return new _index.NumberValue(realm, bytesRead);
  });
  obj.defineNativeMethod("internalModuleReadFile", 0, (context, args) => {
    const path = _singletons.To.ToString(realm, args[0]);
    const result = nativeFS.internalModuleReadFile(path);
    if (result === undefined) {
      return realm.intrinsics.undefined;
    }
    return new _index.StringValue(realm, result);
  });

  let FSReqWrapTemplateSrc = `${intrinsicName}.FSReqWrap`;
  let FSReqWrapTemplate = (0, _builder2.default)(FSReqWrapTemplateSrc);
  let val = _index.AbstractValue.createFromTemplate(realm, FSReqWrapTemplate, _index.ObjectValue, [], FSReqWrapTemplateSrc);
  val.values = new _index2.ValuesDomain(new Set([new _index.ObjectValue(realm)]));
  val.intrinsicName = FSReqWrapTemplateSrc;
  _singletons.Properties.DefinePropertyOrThrow(realm, obj, "FSReqWrap", {
    value: val,
    writable: true,
    configurable: true,
    enumerable: true
  });

  // TODO: Implement more of the native methods here. Ideally all of them should
  // just be automatically proxied.

  return obj;
};

var _invariant = require("../../invariant.js");

var _invariant2 = _interopRequireDefault(_invariant);

var _index = require("../../values/index.js");

var _index2 = require("../../domains/index.js");

var _builder = require("../../utils/builder.js");

var _builder2 = _interopRequireDefault(_builder);

var _utils = require("./utils.js");

var _singletons = require("../../singletons.js");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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