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denoland-deno/ext/node/polyfills/internal/streams/lazy_transform.mjs
Bartek Iwańczuk d47147fb6a
feat(ext/node): embed std/node into the snapshot (#17724)
This commit moves "deno_std/node" in "ext/node" crate. The code is
transpiled and snapshotted during the build process.

During the first pass a minimal amount of work was done to create the
snapshot, a lot of code in "ext/node" depends on presence of "Deno"
global. This code will be gradually fixed in the follow up PRs to migrate
it to import relevant APIs from "internal:" modules.

Currently the code from snapshot is not used in any way, and all
Node/npm compatibility still uses code from 
"https://deno.land/std/node" (or from the location specified by 
"DENO_NODE_COMPAT_URL"). This will also be handled in a follow 
up PRs.

---------

Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
2023-02-14 17:38:45 +01:00

53 lines
1.4 KiB
JavaScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// deno-lint-ignore-file
import { getDefaultEncoding } from "internal:deno_node/polyfills/internal/crypto/util.ts";
import stream from "internal:deno_node/polyfills/stream.ts";
function LazyTransform(options) {
this._options = options;
}
Object.setPrototypeOf(LazyTransform.prototype, stream.Transform.prototype);
Object.setPrototypeOf(LazyTransform, stream.Transform);
function makeGetter(name) {
return function () {
stream.Transform.call(this, this._options);
this._writableState.decodeStrings = false;
if (!this._options || !this._options.defaultEncoding) {
this._writableState.defaultEncoding = getDefaultEncoding();
}
return this[name];
};
}
function makeSetter(name) {
return function (val) {
Object.defineProperty(this, name, {
value: val,
enumerable: true,
configurable: true,
writable: true,
});
};
}
Object.defineProperties(LazyTransform.prototype, {
_readableState: {
get: makeGetter("_readableState"),
set: makeSetter("_readableState"),
configurable: true,
enumerable: true,
},
_writableState: {
get: makeGetter("_writableState"),
set: makeSetter("_writableState"),
configurable: true,
enumerable: true,
},
});
export default LazyTransform;