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denoland-deno/ext/node/polyfills/internal/streams/lazy_transform.mjs
Bartek Iwańczuk ce75e31625 refactor(core): include_js_files! 'dir' option doesn't change specifiers (#18019)
This commit changes "include_js_files!" macro from "deno_core"
in a way that "dir" option doesn't cause specifiers to be rewritten 
to include it.

Example:
```
include_js_files! {
  dir "js",
  "hello.js",
}
```

The above definition required embedders to use:
`import ... from "internal:<ext_name>/js/hello.js"`. 
But with this change, the "js" directory in which the files are stored
is an implementation detail, which for embedders results in: 
`import ... from "internal:<ext_name>/hello.js"`.

The directory the files are stored in, is an implementation detail and 
in some cases might result in a significant size difference for the 
snapshot. As an example, in "deno_node" extension, we store the 
source code in "polyfills" directory; which resulted in each specifier 
to look like "internal:deno_node/polyfills/<module_name>", but with 
this change it's "internal:deno_node/<module_name>". 

Given that "deno_node" has over 100 files, many of them having 
several import specifiers to the same extension, this change removes
10 characters from each import specifier.
2023-03-10 12:47:26 +09:00

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/internal/crypto/util.ts";
import stream from "internal:deno_node/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;