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src: fix symlink issue, subtitution middleware hack
Fixes #163
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Original file line number | Diff line number | Diff line change |
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#!/usr/bin/env bash | ||
'use strict'; | ||
|
||
import { join } from 'node:path'; | ||
import { writeFile } from 'node:fs/promises'; | ||
import { | ||
HeadObjectCommand, | ||
ListObjectsV2Command, | ||
S3Client, | ||
} from '@aws-sdk/client-s3'; | ||
import { Linker } from 'nodejs-latest-linker/common.js'; | ||
import { DOCS_DIR, ENDPOINT, PROD_BUCKET, RELEASE_DIR } from './constants.mjs'; | ||
|
||
const DOCS_DIRECTORY_OUT = join( | ||
import.meta.dirname, | ||
'..', | ||
'src', | ||
'constants', | ||
'docsDirectory.json' | ||
); | ||
|
||
const LATEST_VERSIONS_OUT = join( | ||
import.meta.dirname, | ||
'..', | ||
'src', | ||
'constants', | ||
'latestVersions.json' | ||
); | ||
|
||
const CACHED_DIRECTORIES_OUT = join( | ||
import.meta.dirname, | ||
'..', | ||
'src', | ||
'constants', | ||
'cachedDirectories.json' | ||
); | ||
|
||
if (!process.env.CF_ACCESS_KEY_ID) { | ||
throw new TypeError('CF_ACCESS_KEY_ID missing'); | ||
} | ||
|
||
if (!process.env.CF_ACCESS_KEY_ID) { | ||
throw new TypeError('CF_SECRET_ACCESS_KEY missing'); | ||
} | ||
|
||
const client = new S3Client({ | ||
endpoint: ENDPOINT, | ||
region: 'auto', | ||
credentials: { | ||
accessKeyId: process.env.CF_ACCESS_KEY_ID, | ||
secretAccessKey: process.env.CF_SECRET_ACCESS_KEY, | ||
}, | ||
}); | ||
|
||
// Cache the contents of `nodejs/docs/` so we can reference it in the worker | ||
await writeDocsDirectoryFile(client); | ||
|
||
// Grab all of the files & directories in `nodejs/release/` | ||
const releases = await listDirectory(client, RELEASE_DIR); | ||
|
||
// Create the latest version mapping with the contents of `nodejs/release/` | ||
const latestVersions = await getLatestVersionMapping(client, releases); | ||
|
||
// Write it so we can use it in the worker | ||
await writeFile(LATEST_VERSIONS_OUT, JSON.stringify(latestVersions)); | ||
|
||
// Filter the latest version map so we only have the `latest-*` directories | ||
const latestVersionDirectories = Object.keys(latestVersions).map(version => | ||
version === 'node-latest.tar.gz' ? version : `${version}/` | ||
); | ||
|
||
// Create the complete listing of `nodejs/release/` by adding what R2 returned | ||
// and the latest version directories (which are the symlinks) | ||
const releaseDirectorySubdirectories = releases.subdirectories | ||
.concat(latestVersionDirectories) | ||
.sort(); | ||
|
||
// This is the path in R2 for the latest tar archive of Node. | ||
const nodeLatestPath = `nodejs/release/${latestVersions['node-latest.tar.gz'].replaceAll('latest', latestVersions['latest'])}`; | ||
|
||
// Stat the file that `node-latest.tar.gz` points to so we can have accurate | ||
// size & last modified info for the directory listing | ||
const nodeLatest = await headFile(client, nodeLatestPath); | ||
if (!nodeLatest) { | ||
throw new TypeError( | ||
`node-latest.tar.gz points to ${latestVersions['node-latest.tar.gz']} which doesn't exist in the prod bucket` | ||
); | ||
} | ||
/** | ||
* Preprocess these directories since they have symlinks in them that don't | ||
* actually exist in R2 but need to be present when we give a directory listing | ||
* result | ||
* @type {Record<string, import('../src/providers/provider.ts').ReadDirectoryResult>} | ||
*/ | ||
const cachedDirectories = { | ||
'nodejs/release/': { | ||
subdirectories: releaseDirectorySubdirectories, | ||
hasIndexHtmlFile: false, | ||
files: [ | ||
...releases.files, | ||
{ | ||
name: 'node-latest.tar.gz', | ||
lastModified: nodeLatest.lastModified, | ||
size: nodeLatest.size, | ||
}, | ||
], | ||
lastModified: releases.lastModified, | ||
}, | ||
'nodejs/docs/': { | ||
// We reuse the releases listing result here instead of listing the docs | ||
// directory since it's more complete. The docs folder does have some actual | ||
// directories in it, but most of it is symlinks and aren't present in R2. | ||
subdirectories: releaseDirectorySubdirectories, | ||
hasIndexHtmlFile: false, | ||
files: [], | ||
lastModified: releases.lastModified, | ||
}, | ||
}; | ||
await writeFile(CACHED_DIRECTORIES_OUT, JSON.stringify(cachedDirectories)); | ||
/** | ||
* @param {S3Client} client | ||
* @param {string} directory | ||
* @returns {Promise<import('../src/providers/provider.js').ReadDirectoryResult>} | ||
*/ | ||
async function listDirectory(client, directory) { | ||
/** | ||
* @type {Array<string>} | ||
*/ | ||
const subdirectories = []; | ||
/** | ||
* @type {Array<import('../src/providers/provider.js').File>} | ||
*/ | ||
const files = []; | ||
let hasIndexHtmlFile = false; | ||
let truncated = true; | ||
let continuationToken; | ||
let lastModified = new Date(0); | ||
while (truncated) { | ||
const data = await client.send( | ||
new ListObjectsV2Command({ | ||
Bucket: PROD_BUCKET, | ||
Delimiter: '/', | ||
Prefix: directory, | ||
ContinuationToken: continuationToken, | ||
}) | ||
); | ||
if (data.CommonPrefixes) { | ||
data.CommonPrefixes.forEach(value => { | ||
if (value.Prefix) { | ||
subdirectories.push(value.Prefix.substring(directory.length)); | ||
} | ||
}); | ||
} | ||
if (data.Contents) { | ||
data.Contents.forEach(value => { | ||
if (value.Key) { | ||
if (value.Key.match(/index.htm(?:l)$/)) { | ||
hasIndexHtmlFile = true; | ||
} | ||
files.push({ | ||
name: value.Key.substring(directory.length), | ||
lastModified: value.LastModified, | ||
size: value.Size, | ||
}); | ||
if (value.LastModified > lastModified) { | ||
lastModified = value.LastModified; | ||
} | ||
} | ||
}); | ||
} | ||
truncated = data.IsTruncated; | ||
continuationToken = data.NextContinuationToken; | ||
} | ||
return { subdirectories, hasIndexHtmlFile, files, lastModified }; | ||
} | ||
/** | ||
* @param {S3Client} client | ||
* @param {string} path | ||
* @returns {Promise<import('../src/providers/provider.js').File | undefined>} | ||
*/ | ||
async function headFile(client, path) { | ||
const data = await client.send( | ||
new HeadObjectCommand({ | ||
Bucket: PROD_BUCKET, | ||
Key: path, | ||
}) | ||
); | ||
if (!data.LastModified || !data.ContentLength) { | ||
return undefined; | ||
} | ||
return { | ||
name: path, | ||
lastModified: data.LastModified, | ||
size: data.ContentLength, | ||
}; | ||
} | ||
/** | ||
* @param {S3Client} client | ||
*/ | ||
async function writeDocsDirectoryFile(client) { | ||
// Grab all of the directories in `nodejs/docs/` | ||
const docs = await listDirectory(client, DOCS_DIR); | ||
// Cache the contents of `nodejs/docs/` so we can refer to it in the worker w/o | ||
// making a call to R2. | ||
await writeFile( | ||
DOCS_DIRECTORY_OUT, | ||
JSON.stringify( | ||
docs.subdirectories.map(subdirectory => | ||
subdirectory.substring(0, subdirectory.length - 1) | ||
) | ||
) | ||
); | ||
} | ||
/** | ||
* @param {S3Client} client | ||
* @param {import('../src/providers/provider.js').ReadDirectoryResult} releases | ||
* @returns {Promise<Record<string, string>>} | ||
*/ | ||
async function getLatestVersionMapping(client, releases) { | ||
const linker = new Linker({ baseDir: RELEASE_DIR, docs: DOCS_DIR }); | ||
/** | ||
* Creates mappings to the latest versions of Node | ||
* @type {Map<string, string>} | ||
* @example { 'nodejs/release/latest-v20.x': 'nodejs/release/v20.x.x' } | ||
*/ | ||
const links = await linker.getLinks( | ||
[...releases.subdirectories, ...releases.files.map(file => file.name)], | ||
async directory => { | ||
const { subdirectories, files } = await listDirectory( | ||
client, | ||
`${directory}/` | ||
); | ||
return [...subdirectories, ...files.map(file => file.name)]; | ||
} | ||
); | ||
/** | ||
* @type {Record<string, string>} | ||
* @example {'latest-v20.x': 'v20.x.x'} | ||
*/ | ||
const latestVersions = {}; | ||
for (const [key, value] of links) { | ||
const trimmedKey = key.substring(RELEASE_DIR.length); | ||
const trimmedValue = value.substring(RELEASE_DIR.length); | ||
latestVersions[trimmedKey] = trimmedValue; | ||
} | ||
return latestVersions; | ||
} |
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