Fast, fault-tolerant, cross-platform, disk-based, data-agnostic, content-addressable cache. 

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const uniqueFilename = require('unique-filename')

const contentPath = require('./content/path')

const hashToSegments = require('./util/hash-to-segments')

const indexV = require('../package.json')['cache-version'].index

const moveFile = require('@npmcli/move-file')

const { moveFile } = require('@npmcli/fs')

module.exports.NotFoundError = class NotFoundError extends Error {

    super(`No cache entry for ${key} found in ${cache}`)

async function compact (cache, key, matchFn, opts = {}) {

  const entries = await bucketEntries(bucket)

  // we loop backwards because the bottom-most result is the newest

  // since we add new entries with appendFile

  for (let i = entries.length - 1; i >= 0; --i) {

    // a null integrity could mean either a delete was appended

    // or the user has simply stored an index that does not map

    // to any content. we determine if the user wants to keep the

    // null integrity based on the validateEntry function passed in options.

    // if the integrity is null and no validateEntry is provided, we break

    // as we consider the null integrity to be a deletion of everything

    if (entry.integrity === null && !opts.validateEntry) {

    // if this entry is valid, and it is either the first entry or

    // the newEntries array doesn't already include an entry that

    // matches this one based on the provided matchFn, then we add

    if ((!opts.validateEntry || opts.validateEntry(entry) === true) &&

        !newEntries.find((oldEntry) => matchFn(oldEntry, entry)))) {

  const newIndex = '\n' + newEntries.map((entry) => {

    const stringified = JSON.stringify(entry)

    const target = uniqueFilename(path.join(cache, 'tmp'), opts.tmpPrefix)

    await mkdir(path.dirname(target), { recursive: true })

      return rm(tmp.target, { recursive: true, force: true })

    await writeFile(tmp.target, newIndex, { flag: 'wx' })

    await mkdir(path.dirname(bucket), { recursive: true })

    // we use @npmcli/move-file directly here because we

    // want to overwrite the existing file

  // we reverse the list we generated such that the newest

  // entries come first in order to make looping through them easier

  // the true passed to formatEntry tells it to keep null

  // integrity values, if they made it this far it's because

  // validateEntry returned true, and as such we should return it

  return newEntries.reverse().map((entry) => formatEntry(cache, entry, true))

async function insert (cache, key, integrity, opts = {}) {

    integrity: integrity && ssri.stringify(integrity),

const move = require('@npmcli/move-file')

const { moveFile: move } = require('@npmcli/fs')

const pinflight = require('promise-inflight')

  const isWindows = process.platform === 'win32'

  // This isn't quite an fs.rename -- the assumption is that

  // if `dest` already exists, and we get certain errors while

  // trying to move it, we should just not bother.

  // In the case of cache corruption, users will receive an

  // EINTEGRITY error elsewhere, and can remove the offending

  // Note that, as the name suggests, this strictly only supports file moves.

    if (isWindows && err.code === 'EPERM') {

      // XXX This is a really weird way to handle this situation, as it

      // results in the src file being deleted even though the dest

      // might not exist.  Since we pretty much always write files to

      // deterministic locations based on content hash, this is likely

      // ok (or at worst, just ends in a future cache miss).  But it would

      // be worth investigating at some time in the future if this is

    } else if (err.code === 'EEXIST' || err.code === 'EBUSY') {

      // file already exists, so whatever

      !isWindows && fs.chmod(dest, '0444'),

    return pinflight('cacache-move-file:' + dest, async () => {

      await fs.stat(dest).catch((err) => {

          // Something else is wrong here. Bail bail bail

      // file doesn't already exist! let's try a rename -> copy fallback

      // only delete if it successfully copies

  "description": "Fast, fault-tolerant, cross-platform, disk-based, data-agnostic, content-addressable cache.",

    "test-docker": "docker run -it --rm --name pacotest -v \"$PWD\":/tmp -w /tmp node:latest npm test",

    "template-oss-apply": "template-oss-apply --force"

    "url": "https://github.com/npm/cacache.git"

    "node": "^14.17.0 || ^16.13.0 || >=18.0.0"

    "//@npmcli/template-oss": "This file is partially managed by @npmcli/template-oss. Edits may be overwritten.",

		{
		"name": "cacache",
		"version": "17.0.1",
		"version": "17.0.2",
		"cache-version": {
		@@ -48,4 +48,3 @@ "content": "2",
		"dependencies": {
		"@npmcli/fs": "^3.0.0",
		"@npmcli/move-file": "^3.0.0",
		"@npmcli/fs": "^3.1.0",
		"fs-minipass": "^2.1.0",
		@@ -66,3 +65,3 @@ "glob": "^8.0.1",
		"@npmcli/eslint-config": "^4.0.0",
		"@npmcli/template-oss": "4.5.1",
		"@npmcli/template-oss": "4.8.0",
		"tap": "^16.0.0"
		@@ -76,3 +75,3 @@ },
		"windowsCI": false,
		"version": "4.5.1"
		"version": "4.8.0"
		},
		@@ -79,0 +78,0 @@ "author": "GitHub Inc.",

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Dependency changes

		@@ -20,3 +20,3 @@ 'use strict'
		const indexV = require('../package.json')['cache-version'].index
		const moveFile = require('@npmcli/move-file')
		const { moveFile } = require('@npmcli/fs')

		@@ -23,0 +23,0 @@ module.exports.NotFoundError = class NotFoundError extends Error {

		'use strict'

		const fs = require('fs/promises')
		const move = require('@npmcli/move-file')
		const { moveFile: move } = require('@npmcli/fs')
		const pinflight = require('promise-inflight')
		@@ -6,0 +6,0 @@