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index.js
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index.js
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import fss from 'node:fs'
import fs from 'node:fs/promises'
import path from 'node:path'
import getNpmTarballUrl from 'get-npm-tarball-url'
import { npmHighImpact } from 'npm-high-impact'
import { inflate } from 'pako'
import { publint } from 'publint'
import pLimit from 'p-limit'
import { untar } from '../site/src/utils/untar.js'
import { createTarballVfs } from '../site/src/utils/tarball.js'
/*
Results enum (severity):
0: No issues
1: Has suggestions
2: Has warnings
3: Has errors
*/
const cachedResultsFileUrl = new URL('./cache/_results.json', import.meta.url)
const usedCacheFileBaseNames = ['_results.json']
const useCacheOnly = process.argv.includes('--cache')
try {
await fs.mkdir('./cache', { recursive: true })
if (process.argv.includes('--bench')) {
await benchCommand()
} else {
await mainCommand()
}
} catch (e) {
console.error(e)
process.exitCode = 1
} finally {
// cleanup unused cache
const cachedFiles = await fs.readdir('./cache')
await Promise.all(
cachedFiles.map(async (file) => {
if (!usedCacheFileBaseNames.includes(file)) {
await fs.rm(new URL(`./cache/${file}`, import.meta.url))
}
})
)
}
async function mainCommand() {
const packages = npmHighImpact.slice(0, 200)
const limit = pLimit(5)
const processed = await Promise.all(
packages.map((pkg) =>
limit(async () => {
try {
const pkgData = await fetchPkgData(pkg) // Handles tar (t)
if (!pkgData) {
console.log('No data for', pkg)
return null
}
const { files, version } = pkgData
const vfs = createTarballVfs(files)
// // The tar file names have appended "package", except for `@types` packages very strangely
const pkgDir = files.length ? files[0].name.split('/')[0] : 'package'
const { messages } = await publint({ pkgDir, vfs })
const severity =
messages.length === 0
? 0
: Math.max(...messages.map((m) => messageToSeverity(m)))
// Provide feedback
console.log(pkg, severity)
return { version, severity }
} catch (e) {
console.error(`Failed to lint ${pkg}`, e)
return null
}
})
)
)
const result = {}
for (let i = 0; i < packages.length; i++) {
const p = processed[i]
if (p) {
result[`${packages[i]}@${p.version}`] = p.severity
}
}
await fs.writeFile(cachedResultsFileUrl, JSON.stringify(result, null, 2))
}
async function benchCommand() {
console.log('Fetching packages...')
const packages = npmHighImpact.slice(0, 200)
const limit = pLimit(5)
const pkgData = await Promise.all(
packages.map((pkg) =>
limit(async () => {
try {
const data = await fetchPkgData(pkg)
if (!data) {
console.log('No data for', pkg)
return null
}
return { ...data, pkg }
} catch (e) {
console.error(`Failed to fetch ${pkg}`, e)
return null
}
})
)
)
console.log('Linting packages...')
const start = performance.now()
await Promise.all(
pkgData.map((d) =>
limit(async () => {
if (!d) return
try {
const { files } = d
const pkgDir = files.length ? files[0].name.split('/')[0] : 'package'
await publint({ pkgDir, vfs: createTarballVfs(files) })
} catch (e) {
console.error(`Failed to lint ${d.pkg}`, e)
return null
}
})
)
)
const duration = performance.now() - start
console.log(`Linted ${packages.length} packages in ${duration.toFixed(2)}ms`)
}
/**
* @param {string} pkg
*/
async function fetchPkgData(pkg) {
const version = useCacheOnly
? await getPkgVersionFromCache(pkg)
: await fetchPkgLatestVersion(pkg)
if (!version) return null
const cachedFileUrl = getCacheTarFileUrl(pkg, version)
usedCacheFileBaseNames.push(path.basename(cachedFileUrl.href))
/** @type {ArrayBuffer} */
let resultBuffer
if (fss.existsSync(cachedFileUrl)) {
resultBuffer = (await fs.readFile(cachedFileUrl)).buffer
} else if (!useCacheOnly) {
resultBuffer = await fetchPkg(pkg, version)
await fs.writeFile(cachedFileUrl, Buffer.from(resultBuffer))
} else {
return null
}
const tarBuffer = inflate(resultBuffer).buffer // Handles gzip (gz)
/** @type {import('../site/src/utils/tarball.js').TarballFile[]} */
const files = untar(tarBuffer) // Handles tar (t)
return { files, version }
}
/**
* @param {string} pkg
* @param {string} version
*/
function getCacheTarFileUrl(pkg, version) {
return new URL(
`./cache/${pkg.replace('/', '__')}-${version}.tgz`,
import.meta.url
)
}
/**
* @param {string} pkg
* @param {string} version
* @returns {Promise<ArrayBuffer>}
*/
async function fetchPkg(pkg, version) {
const tarballUrl = getNpmTarballUrl(pkg, version)
const fetchResult = await fetch(tarballUrl, {
headers: {
'User-Agent': 'publint-analysis'
}
})
return await fetchResult.arrayBuffer()
}
/**
* @param {string} pkg
* @returns {Promise<string>}
*/
async function fetchPkgLatestVersion(pkg) {
return await fetch(
`https://registry.npmjs.org/${encodeURIComponent(pkg)}/latest`,
{
headers: {
'User-Agent': 'publint-analysis'
}
}
)
.then((v) => v.ok && v.json())
.then((v) => v.version)
}
async function getPkgVersionFromCache(pkg) {
const cachedFiles = await fs.readdir('./cache')
const pkgName = pkg.replace('/', '__')
for (const file of cachedFiles) {
if (file.startsWith(pkgName)) {
return /-(\d.*)\.tgz/.exec(file)?.[1]
}
}
}
/**
* @param {import('publint').Message} message
*/
function messageToSeverity(message) {
switch (message.type) {
case 'error':
return 3
case 'warning':
return 2
case 'suggestion':
return 1
}
}