ggoodman

// @ts-check

///<reference types="mocha" />

const assert = require('node:assert/strict');

// Since the source file is TypeScript, we have to require the module itself and
// rely on `npm run build` having been called before running tests. ☹️
const { WellKnownError } = require('./well_known_error');

ggoodman

// @ts-check

const CURLY_OPEN = '{'.charCodeAt(0);
const CURLY_CLOSE = '}'.charCodeAt(0);
const SQUARE_OPEN = '['.charCodeAt(0);
const SQUARE_CLOSE = ']'.charCodeAt(0);
const DOUBLE_QUOTE = '"'.charCodeAt(0);
const CHARACTER_COLON = ':'.charCodeAt(0);
const CHARACTER_COMMA = ','.charCodeAt(0);
const CHARACTER_BACKSLASH = '\\'.charCodeAt(0);

ggoodman

import {
  CachedInputFileSystem,
  FileSystem,
  ResolveContext,
  ResolverFactory,
} from 'enhanced-resolve';
import { build, ImportKind, Loader } from 'esbuild';
import * as Fs from 'fs';
import Module from 'module';
import * as Path from 'path';

ggoodman

The withCleanup helper

Example

const result = await withCleanup(async (defer) => {
  const fileHandle = await getFileHandle();
  defer(() => fileHandle.close());
   
 // Carry on

ggoodman

export interface AsyncLuggageFactory<TLuggage, TTraveler extends {}> {
  (obj: TTraveler): PromiseLike<TLuggage>;
}

export interface AsyncLuggage<TLuggage, TTraveler extends {}> {
  get(obj: TTraveler): Promise<TLuggage>;
}

const swallow = () => undefined;

ggoodman

import * as React from 'react';
import { tw } from 'twind';
import type { Context } from 'twind';
import { css } from 'twind/css';
import { TwindContext } from './internal';

export type StyledIntrinsicFactories = {
  [TIntrinsic in keyof React.ReactHTML]: StyledHTML<TIntrinsic>;
};

ggoodman

//@ts-check
'use strict';

const ChildProcess = require('child_process');
const Events = require('events');
const Path = require('path');

const { watch } = require('chokidar');
const { startService } = require('esbuild');
const Pino = require('pino');

ggoodman

Velcro bundle tracing

I've found it helpful when hacking on Velcro to be able to trace the different operations performed by the sytem. Attached is an example log output when bundling up an index.js file having a dependency on react-ui.

If you eliminate the network (thank you polly.js), the whole thing takes 591ms. 🎉

ggoodman

type PromiseReject = {
  eventName: '@@promiseReject';
  err: unknown;
};

type PromiseResolve<T> = {
  eventName: '@@promiseResolve';
  value: T;
};

ggoodman

{
  "PendingSocket": {
    "kind": "Intermediate",
    "onEnter": [
      {}
    ],
    "onEvent": {
      "Error": [
        {
          "targetStates": [