98 lines
2.7 KiB
TypeScript
98 lines
2.7 KiB
TypeScript
/* eslint-disable import/no-extraneous-dependencies */
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import got from 'got'
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import tar from 'tar'
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import { Stream } from 'stream'
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import { promisify } from 'util'
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const pipeline = promisify(Stream.pipeline)
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export type RepoInfo = {
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username: string
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name: string
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branch: string
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filePath: string
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}
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export async function isUrlOk(url: string): Promise<boolean> {
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const res = await got.head(url).catch((e) => e)
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return res.statusCode === 200
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}
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export async function getRepoInfo(
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url: URL,
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examplePath?: string
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): Promise<RepoInfo | undefined> {
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const [, username, name, t, _branch, ...file] = url.pathname.split('/')
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const filePath = examplePath ? examplePath.replace(/^\//, '') : file.join('/')
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// Support repos whose entire purpose is to be a NextJS example, e.g.
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// https://github.com/:username/:my-cool-nextjs-example-repo-name.
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if (t === undefined) {
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const infoResponse = await got(
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`https://api.github.com/repos/${username}/${name}`
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).catch((e) => e)
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if (infoResponse.statusCode !== 200) {
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return
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}
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const info = JSON.parse(infoResponse.body)
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return { username, name, branch: info['default_branch'], filePath }
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}
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// If examplePath is available, the branch name takes the entire path
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const branch = examplePath
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? `${_branch}/${file.join('/')}`.replace(new RegExp(`/${filePath}|/$`), '')
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: _branch
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if (username && name && branch && t === 'tree') {
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return { username, name, branch, filePath }
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}
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}
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export function hasRepo({
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username,
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name,
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branch,
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filePath,
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}: RepoInfo): Promise<boolean> {
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const contentsUrl = `https://api.github.com/repos/${username}/${name}/contents`
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const packagePath = `${filePath ? `/${filePath}` : ''}/package.json`
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return isUrlOk(contentsUrl + packagePath + `?ref=${branch}`)
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}
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export function hasExample(name: string): Promise<boolean> {
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return isUrlOk(
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`https://api.github.com/repos/vercel/next.js/contents/examples/${encodeURIComponent(
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name
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)}/package.json`
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)
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}
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export function downloadAndExtractRepo(
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root: string,
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{ username, name, branch, filePath }: RepoInfo
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): Promise<void> {
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return pipeline(
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got.stream(
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`https://codeload.github.com/${username}/${name}/tar.gz/${branch}`
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),
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tar.extract(
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{ cwd: root, strip: filePath ? filePath.split('/').length + 1 : 1 },
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[`${name}-${branch}${filePath ? `/${filePath}` : ''}`]
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)
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)
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}
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export function downloadAndExtractExample(
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root: string,
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name: string
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): Promise<void> {
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if (name === '__internal-testing-retry') {
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throw new Error('This is an internal example for testing the CLI.')
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}
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return pipeline(
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got.stream('https://codeload.github.com/vercel/next.js/tar.gz/canary'),
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tar.extract({ cwd: root, strip: 3 }, [`next.js-canary/examples/${name}`])
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)
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}
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