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goods.ts
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import assert from 'node:assert'
import { createInterface } from 'node:readline'
import { $, within, ProcessOutput } from './core.js'
import { type Duration, isStringLiteral, parseDuration } from './util.js'
import {
chalk,
minimist,
nodeFetch,
type RequestInfo,
type RequestInit,
} from './vendor.js'
export { default as path } from 'node:path'
export * as os from 'node:os'
export const argv: minimist.ParsedArgs = minimist(process.argv.slice(2))
export function updateArgv(args: string[]) {
for (const k in argv) delete argv[k]
Object.assign(argv, minimist(args))
}
export function sleep(duration: Duration): Promise<unknown> {
return new Promise((resolve) => {
setTimeout(resolve, parseDuration(duration))
})
}
export async function fetch(
url: RequestInfo,
init?: RequestInit
): Promise<Response> {
$.log({ kind: 'fetch', url, init })
return nodeFetch(url, init)
}
export function echo(...args: any[]): void
export function echo(pieces: TemplateStringsArray, ...args: any[]) {
const lastIdx = pieces.length - 1
const msg = isStringLiteral(pieces, ...args)
? args.map((a, i) => pieces[i] + stringify(a)).join('') + pieces[lastIdx]
: [pieces, ...args].map(stringify).join(' ')
console.log(msg)
}
function stringify(arg: ProcessOutput | any) {
if (arg instanceof ProcessOutput) {
return arg.toString().replace(/\n$/, '')
}
return `${arg}`
}
export async function question(
query?: string,
options?: { choices: string[] }
): Promise<string> {
let completer = undefined
if (options && Array.isArray(options.choices)) {
/* c8 ignore next 5 */
completer = function completer(line: string) {
const completions = options.choices
const hits = completions.filter((c) => c.startsWith(line))
return [hits.length ? hits : completions, line]
}
}
const rl = createInterface({
input: process.stdin,
output: process.stdout,
terminal: true,
completer,
})
return new Promise((resolve) =>
rl.question(query ?? '', (answer) => {
rl.close()
resolve(answer)
})
)
}
export async function stdin(): Promise<string> {
let buf = ''
process.stdin.setEncoding('utf8')
for await (const chunk of process.stdin) {
buf += chunk
}
return buf
}
export async function retry<T>(count: number, callback: () => T): Promise<T>
export async function retry<T>(
count: number,
duration: Duration | Generator<number>,
callback: () => T
): Promise<T>
export async function retry<T>(
count: number,
a: Duration | Generator<number> | (() => T),
b?: () => T
): Promise<T> {
const total = count
let callback: () => T
let delayStatic = 0
let delayGen: Generator<number> | undefined
if (typeof a == 'function') {
callback = a
} else {
if (typeof a == 'object') {
delayGen = a
} else {
delayStatic = parseDuration(a)
}
assert(b)
callback = b
}
let lastErr: unknown
let attempt = 0
while (count-- > 0) {
attempt++
try {
return await callback()
} catch (err) {
let delay = 0
if (delayStatic > 0) delay = delayStatic
if (delayGen) delay = delayGen.next().value
$.log({
kind: 'retry',
error:
chalk.bgRed.white(' FAIL ') +
` Attempt: ${attempt}${total == Infinity ? '' : `/${total}`}` +
(delay > 0 ? `; next in ${delay}ms` : ''),
})
lastErr = err
if (count == 0) break
if (delay) await sleep(delay)
}
}
throw lastErr
}
export function* expBackoff(
max: Duration = '60s',
rand: Duration = '100ms'
): Generator<number, void, unknown> {
const maxMs = parseDuration(max)
const randMs = parseDuration(rand)
let n = 1
while (true) {
const ms = Math.floor(Math.random() * randMs)
yield Math.min(2 ** n++, maxMs) + ms
}
}
export async function spinner<T>(callback: () => T): Promise<T>
export async function spinner<T>(title: string, callback: () => T): Promise<T>
export async function spinner<T>(
title: string | (() => T),
callback?: () => T
): Promise<T> {
if (typeof title == 'function') {
callback = title
title = ''
}
if (process.env.CI) return callback!()
let i = 0
const spin = () =>
process.stderr.write(` ${'⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏'[i++ % 10]} ${title}\r`)
return within(async () => {
$.verbose = false
const id = setInterval(spin, 100)
try {
return await callback!()
} finally {
clearInterval(id as NodeJS.Timeout)
process.stderr.write(' '.repeat((process.stdout.columns || 1) - 1) + '\r')
}
})
}