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ISC License
Copyright (c) npm, Inc.
Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted, provided that the
above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE COPYRIGHT HOLDER DISCLAIMS
ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
USE OR PERFORMANCE OF THIS SOFTWARE.

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# cacache [![npm version](https://img.shields.io/npm/v/cacache.svg)](https://npm.im/cacache) [![license](https://img.shields.io/npm/l/cacache.svg)](https://npm.im/cacache) [![Travis](https://img.shields.io/travis/npm/cacache.svg)](https://travis-ci.org/npm/cacache) [![AppVeyor](https://ci.appveyor.com/api/projects/status/github/npm/cacache?svg=true)](https://ci.appveyor.com/project/npm/cacache) [![Coverage Status](https://coveralls.io/repos/github/npm/cacache/badge.svg?branch=latest)](https://coveralls.io/github/npm/cacache?branch=latest)
[`cacache`](https://github.com/npm/cacache) is a Node.js library for managing
local key and content address caches. It's really fast, really good at
concurrency, and it will never give you corrupted data, even if cache files
get corrupted or manipulated.
On systems that support user and group settings on files, cacache will
match the `uid` and `gid` values to the folder where the cache lives, even
when running as `root`.
It was written to be used as [npm](https://npm.im)'s local cache, but can
just as easily be used on its own.
## Install
`$ npm install --save cacache`
## Table of Contents
* [Example](#example)
* [Features](#features)
* [Contributing](#contributing)
* [API](#api)
* [Using localized APIs](#localized-api)
* Reading
* [`ls`](#ls)
* [`ls.stream`](#ls-stream)
* [`get`](#get-data)
* [`get.stream`](#get-stream)
* [`get.info`](#get-info)
* [`get.hasContent`](#get-hasContent)
* Writing
* [`put`](#put-data)
* [`put.stream`](#put-stream)
* [`rm.all`](#rm-all)
* [`rm.entry`](#rm-entry)
* [`rm.content`](#rm-content)
* [`index.compact`](#index-compact)
* [`index.insert`](#index-insert)
* Utilities
* [`clearMemoized`](#clear-memoized)
* [`tmp.mkdir`](#tmp-mkdir)
* [`tmp.withTmp`](#with-tmp)
* Integrity
* [Subresource Integrity](#integrity)
* [`verify`](#verify)
* [`verify.lastRun`](#verify-last-run)
### Example
```javascript
const cacache = require('cacache')
const fs = require('fs')
const tarball = '/path/to/mytar.tgz'
const cachePath = '/tmp/my-toy-cache'
const key = 'my-unique-key-1234'
// Cache it! Use `cachePath` as the root of the content cache
cacache.put(cachePath, key, '10293801983029384').then(integrity => {
console.log(`Saved content to ${cachePath}.`)
})
const destination = '/tmp/mytar.tgz'
// Copy the contents out of the cache and into their destination!
// But this time, use stream instead!
cacache.get.stream(
cachePath, key
).pipe(
fs.createWriteStream(destination)
).on('finish', () => {
console.log('done extracting!')
})
// The same thing, but skip the key index.
cacache.get.byDigest(cachePath, integrityHash).then(data => {
fs.writeFile(destination, data, err => {
console.log('tarball data fetched based on its sha512sum and written out!')
})
})
```
### Features
* Extraction by key or by content address (shasum, etc)
* [Subresource Integrity](#integrity) web standard support
* Multi-hash support - safely host sha1, sha512, etc, in a single cache
* Automatic content deduplication
* Fault tolerance (immune to corruption, partial writes, process races, etc)
* Consistency guarantees on read and write (full data verification)
* Lockless, high-concurrency cache access
* Streaming support
* Promise support
* Fast -- sub-millisecond reads and writes including verification
* Arbitrary metadata storage
* Garbage collection and additional offline verification
* Thorough test coverage
* There's probably a bloom filter in there somewhere. Those are cool, right? 🤔
### Contributing
The cacache team enthusiastically welcomes contributions and project participation! There's a bunch of things you can do if you want to contribute! The [Contributor Guide](CONTRIBUTING.md) has all the information you need for everything from reporting bugs to contributing entire new features. Please don't hesitate to jump in if you'd like to, or even ask us questions if something isn't clear.
All participants and maintainers in this project are expected to follow [Code of Conduct](CODE_OF_CONDUCT.md), and just generally be excellent to each other.
Please refer to the [Changelog](CHANGELOG.md) for project history details, too.
Happy hacking!
### API
#### <a name="ls"></a> `> cacache.ls(cache) -> Promise<Object>`
Lists info for all entries currently in the cache as a single large object. Each
entry in the object will be keyed by the unique index key, with corresponding
[`get.info`](#get-info) objects as the values.
##### Example
```javascript
cacache.ls(cachePath).then(console.log)
// Output
{
'my-thing': {
key: 'my-thing',
integrity: 'sha512-BaSe64/EnCoDED+HAsh=='
path: '.testcache/content/deadbeef', // joined with `cachePath`
time: 12345698490,
size: 4023948,
metadata: {
name: 'blah',
version: '1.2.3',
description: 'this was once a package but now it is my-thing'
}
},
'other-thing': {
key: 'other-thing',
integrity: 'sha1-ANothER+hasH=',
path: '.testcache/content/bada55',
time: 11992309289,
size: 111112
}
}
```
#### <a name="ls-stream"></a> `> cacache.ls.stream(cache) -> Readable`
Lists info for all entries currently in the cache as a single large object.
This works just like [`ls`](#ls), except [`get.info`](#get-info) entries are
returned as `'data'` events on the returned stream.
##### Example
```javascript
cacache.ls.stream(cachePath).on('data', console.log)
// Output
{
key: 'my-thing',
integrity: 'sha512-BaSe64HaSh',
path: '.testcache/content/deadbeef', // joined with `cachePath`
time: 12345698490,
size: 13423,
metadata: {
name: 'blah',
version: '1.2.3',
description: 'this was once a package but now it is my-thing'
}
}
{
key: 'other-thing',
integrity: 'whirlpool-WoWSoMuchSupport',
path: '.testcache/content/bada55',
time: 11992309289,
size: 498023984029
}
{
...
}
```
#### <a name="get-data"></a> `> cacache.get(cache, key, [opts]) -> Promise({data, metadata, integrity})`
Returns an object with the cached data, digest, and metadata identified by
`key`. The `data` property of this object will be a `Buffer` instance that
presumably holds some data that means something to you. I'm sure you know what
to do with it! cacache just won't care.
`integrity` is a [Subresource
Integrity](#integrity)
string. That is, a string that can be used to verify `data`, which looks like
`<hash-algorithm>-<base64-integrity-hash>`.
If there is no content identified by `key`, or if the locally-stored data does
not pass the validity checksum, the promise will be rejected.
A sub-function, `get.byDigest` may be used for identical behavior, except lookup
will happen by integrity hash, bypassing the index entirely. This version of the
function *only* returns `data` itself, without any wrapper.
See: [options](#get-options)
##### Note
This function loads the entire cache entry into memory before returning it. If
you're dealing with Very Large data, consider using [`get.stream`](#get-stream)
instead.
##### Example
```javascript
// Look up by key
cache.get(cachePath, 'my-thing').then(console.log)
// Output:
{
metadata: {
thingName: 'my'
},
integrity: 'sha512-BaSe64HaSh',
data: Buffer#<deadbeef>,
size: 9320
}
// Look up by digest
cache.get.byDigest(cachePath, 'sha512-BaSe64HaSh').then(console.log)
// Output:
Buffer#<deadbeef>
```
#### <a name="get-stream"></a> `> cacache.get.stream(cache, key, [opts]) -> Readable`
Returns a [Readable Stream](https://nodejs.org/api/stream.html#stream_readable_streams) of the cached data identified by `key`.
If there is no content identified by `key`, or if the locally-stored data does
not pass the validity checksum, an error will be emitted.
`metadata` and `integrity` events will be emitted before the stream closes, if
you need to collect that extra data about the cached entry.
A sub-function, `get.stream.byDigest` may be used for identical behavior,
except lookup will happen by integrity hash, bypassing the index entirely. This
version does not emit the `metadata` and `integrity` events at all.
See: [options](#get-options)
##### Example
```javascript
// Look up by key
cache.get.stream(
cachePath, 'my-thing'
).on('metadata', metadata => {
console.log('metadata:', metadata)
}).on('integrity', integrity => {
console.log('integrity:', integrity)
}).pipe(
fs.createWriteStream('./x.tgz')
)
// Outputs:
metadata: { ... }
integrity: 'sha512-SoMeDIGest+64=='
// Look up by digest
cache.get.stream.byDigest(
cachePath, 'sha512-SoMeDIGest+64=='
).pipe(
fs.createWriteStream('./x.tgz')
)
```
#### <a name="get-info"></a> `> cacache.get.info(cache, key) -> Promise`
Looks up `key` in the cache index, returning information about the entry if
one exists.
##### Fields
* `key` - Key the entry was looked up under. Matches the `key` argument.
* `integrity` - [Subresource Integrity hash](#integrity) for the content this entry refers to.
* `path` - Filesystem path where content is stored, joined with `cache` argument.
* `time` - Timestamp the entry was first added on.
* `metadata` - User-assigned metadata associated with the entry/content.
##### Example
```javascript
cacache.get.info(cachePath, 'my-thing').then(console.log)
// Output
{
key: 'my-thing',
integrity: 'sha256-MUSTVERIFY+ALL/THINGS=='
path: '.testcache/content/deadbeef',
time: 12345698490,
size: 849234,
metadata: {
name: 'blah',
version: '1.2.3',
description: 'this was once a package but now it is my-thing'
}
}
```
#### <a name="get-hasContent"></a> `> cacache.get.hasContent(cache, integrity) -> Promise`
Looks up a [Subresource Integrity hash](#integrity) in the cache. If content
exists for this `integrity`, it will return an object, with the specific single integrity hash
that was found in `sri` key, and the size of the found content as `size`. If no content exists for this integrity, it will return `false`.
##### Example
```javascript
cacache.get.hasContent(cachePath, 'sha256-MUSTVERIFY+ALL/THINGS==').then(console.log)
// Output
{
sri: {
source: 'sha256-MUSTVERIFY+ALL/THINGS==',
algorithm: 'sha256',
digest: 'MUSTVERIFY+ALL/THINGS==',
options: []
},
size: 9001
}
cacache.get.hasContent(cachePath, 'sha521-NOT+IN/CACHE==').then(console.log)
// Output
false
```
##### <a name="get-options"></a> Options
##### `opts.integrity`
If present, the pre-calculated digest for the inserted content. If this option
is provided and does not match the post-insertion digest, insertion will fail
with an `EINTEGRITY` error.
##### `opts.memoize`
Default: null
If explicitly truthy, cacache will read from memory and memoize data on bulk read. If `false`, cacache will read from disk data. Reader functions by default read from in-memory cache.
##### `opts.size`
If provided, the data stream will be verified to check that enough data was
passed through. If there's more or less data than expected, insertion will fail
with an `EBADSIZE` error.
#### <a name="put-data"></a> `> cacache.put(cache, key, data, [opts]) -> Promise`
Inserts data passed to it into the cache. The returned Promise resolves with a
digest (generated according to [`opts.algorithms`](#optsalgorithms)) after the
cache entry has been successfully written.
See: [options](#put-options)
##### Example
```javascript
fetch(
'https://registry.npmjs.org/cacache/-/cacache-1.0.0.tgz'
).then(data => {
return cacache.put(cachePath, 'registry.npmjs.org|cacache@1.0.0', data)
}).then(integrity => {
console.log('integrity hash is', integrity)
})
```
#### <a name="put-stream"></a> `> cacache.put.stream(cache, key, [opts]) -> Writable`
Returns a [Writable
Stream](https://nodejs.org/api/stream.html#stream_writable_streams) that inserts
data written to it into the cache. Emits an `integrity` event with the digest of
written contents when it succeeds.
See: [options](#put-options)
##### Example
```javascript
request.get(
'https://registry.npmjs.org/cacache/-/cacache-1.0.0.tgz'
).pipe(
cacache.put.stream(
cachePath, 'registry.npmjs.org|cacache@1.0.0'
).on('integrity', d => console.log(`integrity digest is ${d}`))
)
```
##### <a name="put-options"></a> Options
##### `opts.metadata`
Arbitrary metadata to be attached to the inserted key.
##### `opts.size`
If provided, the data stream will be verified to check that enough data was
passed through. If there's more or less data than expected, insertion will fail
with an `EBADSIZE` error.
##### `opts.integrity`
If present, the pre-calculated digest for the inserted content. If this option
is provided and does not match the post-insertion digest, insertion will fail
with an `EINTEGRITY` error.
`algorithms` has no effect if this option is present.
##### `opts.algorithms`
Default: ['sha512']
Hashing algorithms to use when calculating the [subresource integrity
digest](#integrity)
for inserted data. Can use any algorithm listed in `crypto.getHashes()` or
`'omakase'`/`'お任せします'` to pick a random hash algorithm on each insertion. You
may also use any anagram of `'modnar'` to use this feature.
Currently only supports one algorithm at a time (i.e., an array length of
exactly `1`). Has no effect if `opts.integrity` is present.
##### `opts.memoize`
Default: null
If provided, cacache will memoize the given cache insertion in memory, bypassing
any filesystem checks for that key or digest in future cache fetches. Nothing
will be written to the in-memory cache unless this option is explicitly truthy.
If `opts.memoize` is an object or a `Map`-like (that is, an object with `get`
and `set` methods), it will be written to instead of the global memoization
cache.
Reading from disk data can be forced by explicitly passing `memoize: false` to
the reader functions, but their default will be to read from memory.
##### `opts.tmpPrefix`
Default: null
Prefix to append on the temporary directory name inside the cache's tmp dir.
#### <a name="rm-all"></a> `> cacache.rm.all(cache) -> Promise`
Clears the entire cache. Mainly by blowing away the cache directory itself.
##### Example
```javascript
cacache.rm.all(cachePath).then(() => {
console.log('THE APOCALYPSE IS UPON US 😱')
})
```
#### <a name="rm-entry"></a> `> cacache.rm.entry(cache, key, [opts]) -> Promise`
Alias: `cacache.rm`
Removes the index entry for `key`. Content will still be accessible if
requested directly by content address ([`get.stream.byDigest`](#get-stream)).
By default, this appends a new entry to the index with an integrity of `null`.
If `opts.removeFully` is set to `true` then the index file itself will be
physically deleted rather than appending a `null`.
To remove the content itself (which might still be used by other entries), use
[`rm.content`](#rm-content). Or, to safely vacuum any unused content, use
[`verify`](#verify).
##### Example
```javascript
cacache.rm.entry(cachePath, 'my-thing').then(() => {
console.log('I did not like it anyway')
})
```
#### <a name="rm-content"></a> `> cacache.rm.content(cache, integrity) -> Promise`
Removes the content identified by `integrity`. Any index entries referring to it
will not be usable again until the content is re-added to the cache with an
identical digest.
##### Example
```javascript
cacache.rm.content(cachePath, 'sha512-SoMeDIGest/IN+BaSE64==').then(() => {
console.log('data for my-thing is gone!')
})
```
#### <a name="index-compact"></a> `> cacache.index.compact(cache, key, matchFn, [opts]) -> Promise`
Uses `matchFn`, which must be a synchronous function that accepts two entries
and returns a boolean indicating whether or not the two entries match, to
deduplicate all entries in the cache for the given `key`.
If `opts.validateEntry` is provided, it will be called as a function with the
only parameter being a single index entry. The function must return a Boolean,
if it returns `true` the entry is considered valid and will be kept in the index,
if it returns `false` the entry will be removed from the index.
If `opts.validateEntry` is not provided, however, every entry in the index will
be deduplicated and kept until the first `null` integrity is reached, removing
all entries that were written before the `null`.
The deduplicated list of entries is both written to the index, replacing the
existing content, and returned in the Promise.
#### <a name="index-insert"></a> `> cacache.index.insert(cache, key, integrity, opts) -> Promise`
Writes an index entry to the cache for the given `key` without writing content.
It is assumed if you are using this method, you have already stored the content
some other way and you only wish to add a new index to that content. The `metadata`
and `size` properties are read from `opts` and used as part of the index entry.
Returns a Promise resolving to the newly added entry.
#### <a name="clear-memoized"></a> `> cacache.clearMemoized()`
Completely resets the in-memory entry cache.
#### <a name="tmp-mkdir"></a> `> tmp.mkdir(cache, opts) -> Promise<Path>`
Returns a unique temporary directory inside the cache's `tmp` dir. This
directory will use the same safe user assignment that all the other stuff use.
Once the directory is made, it's the user's responsibility that all files
within are given the appropriate `gid`/`uid` ownership settings to match
the rest of the cache. If not, you can ask cacache to do it for you by
calling [`tmp.fix()`](#tmp-fix), which will fix all tmp directory
permissions.
If you want automatic cleanup of this directory, use
[`tmp.withTmp()`](#with-tpm)
See: [options](#tmp-options)
##### Example
```javascript
cacache.tmp.mkdir(cache).then(dir => {
fs.writeFile(path.join(dir, 'blablabla'), Buffer#<1234>, ...)
})
```
#### <a name="tmp-fix"></a> `> tmp.fix(cache) -> Promise`
Sets the `uid` and `gid` properties on all files and folders within the tmp
folder to match the rest of the cache.
Use this after manually writing files into [`tmp.mkdir`](#tmp-mkdir) or
[`tmp.withTmp`](#with-tmp).
##### Example
```javascript
cacache.tmp.mkdir(cache).then(dir => {
writeFile(path.join(dir, 'file'), someData).then(() => {
// make sure we didn't just put a root-owned file in the cache
cacache.tmp.fix().then(() => {
// all uids and gids match now
})
})
})
```
#### <a name="with-tmp"></a> `> tmp.withTmp(cache, opts, cb) -> Promise`
Creates a temporary directory with [`tmp.mkdir()`](#tmp-mkdir) and calls `cb`
with it. The created temporary directory will be removed when the return value
of `cb()` resolves, the tmp directory will be automatically deleted once that
promise completes.
The same caveats apply when it comes to managing permissions for the tmp dir's
contents.
See: [options](#tmp-options)
##### Example
```javascript
cacache.tmp.withTmp(cache, dir => {
return fs.writeFileAsync(path.join(dir, 'blablabla'), Buffer#<1234>, ...)
}).then(() => {
// `dir` no longer exists
})
```
##### <a name="tmp-options"></a> Options
##### `opts.tmpPrefix`
Default: null
Prefix to append on the temporary directory name inside the cache's tmp dir.
#### <a name="integrity"></a> Subresource Integrity Digests
For content verification and addressing, cacache uses strings following the
[Subresource
Integrity spec](https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity).
That is, any time cacache expects an `integrity` argument or option, it
should be in the format `<hashAlgorithm>-<base64-hash>`.
One deviation from the current spec is that cacache will support any hash
algorithms supported by the underlying Node.js process. You can use
`crypto.getHashes()` to see which ones you can use.
##### Generating Digests Yourself
If you have an existing content shasum, they are generally formatted as a
hexadecimal string (that is, a sha1 would look like:
`5f5513f8822fdbe5145af33b64d8d970dcf95c6e`). In order to be compatible with
cacache, you'll need to convert this to an equivalent subresource integrity
string. For this example, the corresponding hash would be:
`sha1-X1UT+IIv2+UUWvM7ZNjZcNz5XG4=`.
If you want to generate an integrity string yourself for existing data, you can
use something like this:
```javascript
const crypto = require('crypto')
const hashAlgorithm = 'sha512'
const data = 'foobarbaz'
const integrity = (
hashAlgorithm +
'-' +
crypto.createHash(hashAlgorithm).update(data).digest('base64')
)
```
You can also use [`ssri`](https://npm.im/ssri) to have a richer set of functionality
around SRI strings, including generation, parsing, and translating from existing
hex-formatted strings.
#### <a name="verify"></a> `> cacache.verify(cache, opts) -> Promise`
Checks out and fixes up your cache:
* Cleans up corrupted or invalid index entries.
* Custom entry filtering options.
* Garbage collects any content entries not referenced by the index.
* Checks integrity for all content entries and removes invalid content.
* Fixes cache ownership.
* Removes the `tmp` directory in the cache and all its contents.
When it's done, it'll return an object with various stats about the verification
process, including amount of storage reclaimed, number of valid entries, number
of entries removed, etc.
##### <a name="verify-options"></a> Options
##### `opts.concurrency`
Default: 20
Number of concurrently read files in the filesystem while doing clean up.
##### `opts.filter`
Receives a formatted entry. Return false to remove it.
Note: might be called more than once on the same entry.
##### `opts.log`
Custom logger function:
```
log: { silly () {} }
log.silly('verify', 'verifying cache at', cache)
```
##### Example
```sh
echo somegarbage >> $CACHEPATH/content/deadbeef
```
```javascript
cacache.verify(cachePath).then(stats => {
// deadbeef collected, because of invalid checksum.
console.log('cache is much nicer now! stats:', stats)
})
```
#### <a name="verify-last-run"></a> `> cacache.verify.lastRun(cache) -> Promise`
Returns a `Date` representing the last time `cacache.verify` was run on `cache`.
##### Example
```javascript
cacache.verify(cachePath).then(() => {
cacache.verify.lastRun(cachePath).then(lastTime => {
console.log('cacache.verify was last called on' + lastTime)
})
})
```

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'use strict'
const Collect = require('minipass-collect')
const Minipass = require('minipass')
const Pipeline = require('minipass-pipeline')
const fs = require('fs')
const util = require('util')
const index = require('./lib/entry-index')
const memo = require('./lib/memoization')
const read = require('./lib/content/read')
const writeFile = util.promisify(fs.writeFile)
function getData (cache, key, opts = {}) {
const { integrity, memoize, size } = opts
const memoized = memo.get(cache, key, opts)
if (memoized && memoize !== false) {
return Promise.resolve({
metadata: memoized.entry.metadata,
data: memoized.data,
integrity: memoized.entry.integrity,
size: memoized.entry.size,
})
}
return index.find(cache, key, opts).then((entry) => {
if (!entry)
throw new index.NotFoundError(cache, key)
return read(cache, entry.integrity, { integrity, size }).then((data) => {
if (memoize)
memo.put(cache, entry, data, opts)
return {
data,
metadata: entry.metadata,
size: entry.size,
integrity: entry.integrity,
}
})
})
}
module.exports = getData
function getDataByDigest (cache, key, opts = {}) {
const { integrity, memoize, size } = opts
const memoized = memo.get.byDigest(cache, key, opts)
if (memoized && memoize !== false)
return Promise.resolve(memoized)
return read(cache, key, { integrity, size }).then((res) => {
if (memoize)
memo.put.byDigest(cache, key, res, opts)
return res
})
}
module.exports.byDigest = getDataByDigest
function getDataSync (cache, key, opts = {}) {
const { integrity, memoize, size } = opts
const memoized = memo.get(cache, key, opts)
if (memoized && memoize !== false) {
return {
metadata: memoized.entry.metadata,
data: memoized.data,
integrity: memoized.entry.integrity,
size: memoized.entry.size,
}
}
const entry = index.find.sync(cache, key, opts)
if (!entry)
throw new index.NotFoundError(cache, key)
const data = read.sync(cache, entry.integrity, {
integrity: integrity,
size: size,
})
const res = {
metadata: entry.metadata,
data: data,
size: entry.size,
integrity: entry.integrity,
}
if (memoize)
memo.put(cache, entry, res.data, opts)
return res
}
module.exports.sync = getDataSync
function getDataByDigestSync (cache, digest, opts = {}) {
const { integrity, memoize, size } = opts
const memoized = memo.get.byDigest(cache, digest, opts)
if (memoized && memoize !== false)
return memoized
const res = read.sync(cache, digest, {
integrity: integrity,
size: size,
})
if (memoize)
memo.put.byDigest(cache, digest, res, opts)
return res
}
module.exports.sync.byDigest = getDataByDigestSync
const getMemoizedStream = (memoized) => {
const stream = new Minipass()
stream.on('newListener', function (ev, cb) {
ev === 'metadata' && cb(memoized.entry.metadata)
ev === 'integrity' && cb(memoized.entry.integrity)
ev === 'size' && cb(memoized.entry.size)
})
stream.end(memoized.data)
return stream
}
function getStream (cache, key, opts = {}) {
const { memoize, size } = opts
const memoized = memo.get(cache, key, opts)
if (memoized && memoize !== false)
return getMemoizedStream(memoized)
const stream = new Pipeline()
index
.find(cache, key)
.then((entry) => {
if (!entry)
throw new index.NotFoundError(cache, key)
stream.emit('metadata', entry.metadata)
stream.emit('integrity', entry.integrity)
stream.emit('size', entry.size)
stream.on('newListener', function (ev, cb) {
ev === 'metadata' && cb(entry.metadata)
ev === 'integrity' && cb(entry.integrity)
ev === 'size' && cb(entry.size)
})
const src = read.readStream(
cache,
entry.integrity,
{ ...opts, size: typeof size !== 'number' ? entry.size : size }
)
if (memoize) {
const memoStream = new Collect.PassThrough()
memoStream.on('collect', data => memo.put(cache, entry, data, opts))
stream.unshift(memoStream)
}
stream.unshift(src)
})
.catch((err) => stream.emit('error', err))
return stream
}
module.exports.stream = getStream
function getStreamDigest (cache, integrity, opts = {}) {
const { memoize } = opts
const memoized = memo.get.byDigest(cache, integrity, opts)
if (memoized && memoize !== false) {
const stream = new Minipass()
stream.end(memoized)
return stream
} else {
const stream = read.readStream(cache, integrity, opts)
if (!memoize)
return stream
const memoStream = new Collect.PassThrough()
memoStream.on('collect', data => memo.put.byDigest(
cache,
integrity,
data,
opts
))
return new Pipeline(stream, memoStream)
}
}
module.exports.stream.byDigest = getStreamDigest
function info (cache, key, opts = {}) {
const { memoize } = opts
const memoized = memo.get(cache, key, opts)
if (memoized && memoize !== false)
return Promise.resolve(memoized.entry)
else
return index.find(cache, key)
}
module.exports.info = info
function copy (cache, key, dest, opts = {}) {
if (read.copy) {
return index.find(cache, key, opts).then((entry) => {
if (!entry)
throw new index.NotFoundError(cache, key)
return read.copy(cache, entry.integrity, dest, opts)
.then(() => {
return {
metadata: entry.metadata,
size: entry.size,
integrity: entry.integrity,
}
})
})
}
return getData(cache, key, opts).then((res) => {
return writeFile(dest, res.data).then(() => {
return {
metadata: res.metadata,
size: res.size,
integrity: res.integrity,
}
})
})
}
module.exports.copy = copy
function copyByDigest (cache, key, dest, opts = {}) {
if (read.copy)
return read.copy(cache, key, dest, opts).then(() => key)
return getDataByDigest(cache, key, opts).then((res) => {
return writeFile(dest, res).then(() => key)
})
}
module.exports.copy.byDigest = copyByDigest
module.exports.hasContent = read.hasContent

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uni-demo/node_modules/cacache/index.js generated vendored Normal file
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'use strict'
const ls = require('./ls.js')
const get = require('./get.js')
const put = require('./put.js')
const rm = require('./rm.js')
const verify = require('./verify.js')
const { clearMemoized } = require('./lib/memoization.js')
const tmp = require('./lib/util/tmp.js')
const index = require('./lib/entry-index.js')
module.exports.index = {}
module.exports.index.compact = index.compact
module.exports.index.insert = index.insert
module.exports.ls = ls
module.exports.ls.stream = ls.stream
module.exports.get = get
module.exports.get.byDigest = get.byDigest
module.exports.get.sync = get.sync
module.exports.get.sync.byDigest = get.sync.byDigest
module.exports.get.stream = get.stream
module.exports.get.stream.byDigest = get.stream.byDigest
module.exports.get.copy = get.copy
module.exports.get.copy.byDigest = get.copy.byDigest
module.exports.get.info = get.info
module.exports.get.hasContent = get.hasContent
module.exports.get.hasContent.sync = get.hasContent.sync
module.exports.put = put
module.exports.put.stream = put.stream
module.exports.rm = rm.entry
module.exports.rm.all = rm.all
module.exports.rm.entry = module.exports.rm
module.exports.rm.content = rm.content
module.exports.clearMemoized = clearMemoized
module.exports.tmp = {}
module.exports.tmp.mkdir = tmp.mkdir
module.exports.tmp.withTmp = tmp.withTmp
module.exports.verify = verify
module.exports.verify.lastRun = verify.lastRun

29
uni-demo/node_modules/cacache/lib/content/path.js generated vendored Normal file
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'use strict'
const contentVer = require('../../package.json')['cache-version'].content
const hashToSegments = require('../util/hash-to-segments')
const path = require('path')
const ssri = require('ssri')
// Current format of content file path:
//
// sha512-BaSE64Hex= ->
// ~/.my-cache/content-v2/sha512/ba/da/55deadbeefc0ffee
//
module.exports = contentPath
function contentPath (cache, integrity) {
const sri = ssri.parse(integrity, { single: true })
// contentPath is the *strongest* algo given
return path.join(
contentDir(cache),
sri.algorithm,
...hashToSegments(sri.hexDigest())
)
}
module.exports.contentDir = contentDir
function contentDir (cache) {
return path.join(cache, `content-v${contentVer}`)
}

244
uni-demo/node_modules/cacache/lib/content/read.js generated vendored Normal file
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'use strict'
const util = require('util')
const fs = require('fs')
const fsm = require('fs-minipass')
const ssri = require('ssri')
const contentPath = require('./path')
const Pipeline = require('minipass-pipeline')
const lstat = util.promisify(fs.lstat)
const readFile = util.promisify(fs.readFile)
module.exports = read
const MAX_SINGLE_READ_SIZE = 64 * 1024 * 1024
function read (cache, integrity, opts = {}) {
const { size } = opts
return withContentSri(cache, integrity, (cpath, sri) => {
// get size
return lstat(cpath).then(stat => ({ stat, cpath, sri }))
}).then(({ stat, cpath, sri }) => {
if (typeof size === 'number' && stat.size !== size)
throw sizeError(size, stat.size)
if (stat.size > MAX_SINGLE_READ_SIZE)
return readPipeline(cpath, stat.size, sri, new Pipeline()).concat()
return readFile(cpath, null).then((data) => {
if (!ssri.checkData(data, sri))
throw integrityError(sri, cpath)
return data
})
})
}
const readPipeline = (cpath, size, sri, stream) => {
stream.push(
new fsm.ReadStream(cpath, {
size,
readSize: MAX_SINGLE_READ_SIZE,
}),
ssri.integrityStream({
integrity: sri,
size,
})
)
return stream
}
module.exports.sync = readSync
function readSync (cache, integrity, opts = {}) {
const { size } = opts
return withContentSriSync(cache, integrity, (cpath, sri) => {
const data = fs.readFileSync(cpath)
if (typeof size === 'number' && size !== data.length)
throw sizeError(size, data.length)
if (ssri.checkData(data, sri))
return data
throw integrityError(sri, cpath)
})
}
module.exports.stream = readStream
module.exports.readStream = readStream
function readStream (cache, integrity, opts = {}) {
const { size } = opts
const stream = new Pipeline()
withContentSri(cache, integrity, (cpath, sri) => {
// just lstat to ensure it exists
return lstat(cpath).then((stat) => ({ stat, cpath, sri }))
}).then(({ stat, cpath, sri }) => {
if (typeof size === 'number' && size !== stat.size)
return stream.emit('error', sizeError(size, stat.size))
readPipeline(cpath, stat.size, sri, stream)
}, er => stream.emit('error', er))
return stream
}
let copyFile
if (fs.copyFile) {
module.exports.copy = copy
module.exports.copy.sync = copySync
copyFile = util.promisify(fs.copyFile)
}
function copy (cache, integrity, dest) {
return withContentSri(cache, integrity, (cpath, sri) => {
return copyFile(cpath, dest)
})
}
function copySync (cache, integrity, dest) {
return withContentSriSync(cache, integrity, (cpath, sri) => {
return fs.copyFileSync(cpath, dest)
})
}
module.exports.hasContent = hasContent
function hasContent (cache, integrity) {
if (!integrity)
return Promise.resolve(false)
return withContentSri(cache, integrity, (cpath, sri) => {
return lstat(cpath).then((stat) => ({ size: stat.size, sri, stat }))
}).catch((err) => {
if (err.code === 'ENOENT')
return false
if (err.code === 'EPERM') {
/* istanbul ignore else */
if (process.platform !== 'win32')
throw err
else
return false
}
})
}
module.exports.hasContent.sync = hasContentSync
function hasContentSync (cache, integrity) {
if (!integrity)
return false
return withContentSriSync(cache, integrity, (cpath, sri) => {
try {
const stat = fs.lstatSync(cpath)
return { size: stat.size, sri, stat }
} catch (err) {
if (err.code === 'ENOENT')
return false
if (err.code === 'EPERM') {
/* istanbul ignore else */
if (process.platform !== 'win32')
throw err
else
return false
}
}
})
}
function withContentSri (cache, integrity, fn) {
const tryFn = () => {
const sri = ssri.parse(integrity)
// If `integrity` has multiple entries, pick the first digest
// with available local data.
const algo = sri.pickAlgorithm()
const digests = sri[algo]
if (digests.length <= 1) {
const cpath = contentPath(cache, digests[0])
return fn(cpath, digests[0])
} else {
// Can't use race here because a generic error can happen before
// a ENOENT error, and can happen before a valid result
return Promise
.all(digests.map((meta) => {
return withContentSri(cache, meta, fn)
.catch((err) => {
if (err.code === 'ENOENT') {
return Object.assign(
new Error('No matching content found for ' + sri.toString()),
{ code: 'ENOENT' }
)
}
return err
})
}))
.then((results) => {
// Return the first non error if it is found
const result = results.find((r) => !(r instanceof Error))
if (result)
return result
// Throw the No matching content found error
const enoentError = results.find((r) => r.code === 'ENOENT')
if (enoentError)
throw enoentError
// Throw generic error
throw results.find((r) => r instanceof Error)
})
}
}
return new Promise((resolve, reject) => {
try {
tryFn()
.then(resolve)
.catch(reject)
} catch (err) {
reject(err)
}
})
}
function withContentSriSync (cache, integrity, fn) {
const sri = ssri.parse(integrity)
// If `integrity` has multiple entries, pick the first digest
// with available local data.
const algo = sri.pickAlgorithm()
const digests = sri[algo]
if (digests.length <= 1) {
const cpath = contentPath(cache, digests[0])
return fn(cpath, digests[0])
} else {
let lastErr = null
for (const meta of digests) {
try {
return withContentSriSync(cache, meta, fn)
} catch (err) {
lastErr = err
}
}
throw lastErr
}
}
function sizeError (expected, found) {
const err = new Error(`Bad data size: expected inserted data to be ${expected} bytes, but got ${found} instead`)
err.expected = expected
err.found = found
err.code = 'EBADSIZE'
return err
}
function integrityError (sri, path) {
const err = new Error(`Integrity verification failed for ${sri} (${path})`)
err.code = 'EINTEGRITY'
err.sri = sri
err.path = path
return err
}

19
uni-demo/node_modules/cacache/lib/content/rm.js generated vendored Normal file
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'use strict'
const util = require('util')
const contentPath = require('./path')
const { hasContent } = require('./read')
const rimraf = util.promisify(require('rimraf'))
module.exports = rm
function rm (cache, integrity) {
return hasContent(cache, integrity).then((content) => {
// ~pretty~ sure we can't end up with a content lacking sri, but be safe
if (content && content.sri)
return rimraf(contentPath(cache, content.sri)).then(() => true)
else
return false
})
}

189
uni-demo/node_modules/cacache/lib/content/write.js generated vendored Normal file
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'use strict'
const util = require('util')
const contentPath = require('./path')
const fixOwner = require('../util/fix-owner')
const fs = require('fs')
const moveFile = require('../util/move-file')
const Minipass = require('minipass')
const Pipeline = require('minipass-pipeline')
const Flush = require('minipass-flush')
const path = require('path')
const rimraf = util.promisify(require('rimraf'))
const ssri = require('ssri')
const uniqueFilename = require('unique-filename')
const { disposer } = require('./../util/disposer')
const fsm = require('fs-minipass')
const writeFile = util.promisify(fs.writeFile)
module.exports = write
function write (cache, data, opts = {}) {
const { algorithms, size, integrity } = opts
if (algorithms && algorithms.length > 1)
throw new Error('opts.algorithms only supports a single algorithm for now')
if (typeof size === 'number' && data.length !== size)
return Promise.reject(sizeError(size, data.length))
const sri = ssri.fromData(data, algorithms ? { algorithms } : {})
if (integrity && !ssri.checkData(data, integrity, opts))
return Promise.reject(checksumError(integrity, sri))
return disposer(makeTmp(cache, opts), makeTmpDisposer,
(tmp) => {
return writeFile(tmp.target, data, { flag: 'wx' })
.then(() => moveToDestination(tmp, cache, sri, opts))
})
.then(() => ({ integrity: sri, size: data.length }))
}
module.exports.stream = writeStream
// writes proxied to the 'inputStream' that is passed to the Promise
// 'end' is deferred until content is handled.
class CacacheWriteStream extends Flush {
constructor (cache, opts) {
super()
this.opts = opts
this.cache = cache
this.inputStream = new Minipass()
this.inputStream.on('error', er => this.emit('error', er))
this.inputStream.on('drain', () => this.emit('drain'))
this.handleContentP = null
}
write (chunk, encoding, cb) {
if (!this.handleContentP) {
this.handleContentP = handleContent(
this.inputStream,
this.cache,
this.opts
)
}
return this.inputStream.write(chunk, encoding, cb)
}
flush (cb) {
this.inputStream.end(() => {
if (!this.handleContentP) {
const e = new Error('Cache input stream was empty')
e.code = 'ENODATA'
// empty streams are probably emitting end right away.
// defer this one tick by rejecting a promise on it.
return Promise.reject(e).catch(cb)
}
this.handleContentP.then(
(res) => {
res.integrity && this.emit('integrity', res.integrity)
res.size !== null && this.emit('size', res.size)
cb()
},
(er) => cb(er)
)
})
}
}
function writeStream (cache, opts = {}) {
return new CacacheWriteStream(cache, opts)
}
function handleContent (inputStream, cache, opts) {
return disposer(makeTmp(cache, opts), makeTmpDisposer, (tmp) => {
return pipeToTmp(inputStream, cache, tmp.target, opts)
.then((res) => {
return moveToDestination(
tmp,
cache,
res.integrity,
opts
).then(() => res)
})
})
}
function pipeToTmp (inputStream, cache, tmpTarget, opts) {
let integrity
let size
const hashStream = ssri.integrityStream({
integrity: opts.integrity,
algorithms: opts.algorithms,
size: opts.size,
})
hashStream.on('integrity', i => {
integrity = i
})
hashStream.on('size', s => {
size = s
})
const outStream = new fsm.WriteStream(tmpTarget, {
flags: 'wx',
})
// NB: this can throw if the hashStream has a problem with
// it, and the data is fully written. but pipeToTmp is only
// called in promisory contexts where that is handled.
const pipeline = new Pipeline(
inputStream,
hashStream,
outStream
)
return pipeline.promise()
.then(() => ({ integrity, size }))
.catch(er => rimraf(tmpTarget).then(() => {
throw er
}))
}
function makeTmp (cache, opts) {
const tmpTarget = uniqueFilename(path.join(cache, 'tmp'), opts.tmpPrefix)
return fixOwner.mkdirfix(cache, path.dirname(tmpTarget)).then(() => ({
target: tmpTarget,
moved: false,
}))
}
function makeTmpDisposer (tmp) {
if (tmp.moved)
return Promise.resolve()
return rimraf(tmp.target)
}
function moveToDestination (tmp, cache, sri, opts) {
const destination = contentPath(cache, sri)
const destDir = path.dirname(destination)
return fixOwner
.mkdirfix(cache, destDir)
.then(() => {
return moveFile(tmp.target, destination)
})
.then(() => {
tmp.moved = true
return fixOwner.chownr(cache, destination)
})
}
function sizeError (expected, found) {
const err = new Error(`Bad data size: expected inserted data to be ${expected} bytes, but got ${found} instead`)
err.expected = expected
err.found = found
err.code = 'EBADSIZE'
return err
}
function checksumError (expected, found) {
const err = new Error(`Integrity check failed:
Wanted: ${expected}
Found: ${found}`)
err.code = 'EINTEGRITY'
err.expected = expected
err.found = found
return err
}

394
uni-demo/node_modules/cacache/lib/entry-index.js generated vendored Normal file
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'use strict'
const util = require('util')
const crypto = require('crypto')
const fs = require('fs')
const Minipass = require('minipass')
const path = require('path')
const ssri = require('ssri')
const uniqueFilename = require('unique-filename')
const { disposer } = require('./util/disposer')
const contentPath = require('./content/path')
const fixOwner = require('./util/fix-owner')
const hashToSegments = require('./util/hash-to-segments')
const indexV = require('../package.json')['cache-version'].index
const moveFile = require('@npmcli/move-file')
const _rimraf = require('rimraf')
const rimraf = util.promisify(_rimraf)
rimraf.sync = _rimraf.sync
const appendFile = util.promisify(fs.appendFile)
const readFile = util.promisify(fs.readFile)
const readdir = util.promisify(fs.readdir)
const writeFile = util.promisify(fs.writeFile)
module.exports.NotFoundError = class NotFoundError extends Error {
constructor (cache, key) {
super(`No cache entry for ${key} found in ${cache}`)
this.code = 'ENOENT'
this.cache = cache
this.key = key
}
}
module.exports.compact = compact
async function compact (cache, key, matchFn, opts = {}) {
const bucket = bucketPath(cache, key)
const entries = await bucketEntries(bucket)
const newEntries = []
// we loop backwards because the bottom-most result is the newest
// since we add new entries with appendFile
for (let i = entries.length - 1; i >= 0; --i) {
const entry = entries[i]
// a null integrity could mean either a delete was appended
// or the user has simply stored an index that does not map
// to any content. we determine if the user wants to keep the
// null integrity based on the validateEntry function passed in options.
// if the integrity is null and no validateEntry is provided, we break
// as we consider the null integrity to be a deletion of everything
// that came before it.
if (entry.integrity === null && !opts.validateEntry)
break
// if this entry is valid, and it is either the first entry or
// the newEntries array doesn't already include an entry that
// matches this one based on the provided matchFn, then we add
// it to the beginning of our list
if ((!opts.validateEntry || opts.validateEntry(entry) === true) &&
(newEntries.length === 0 ||
!newEntries.find((oldEntry) => matchFn(oldEntry, entry))))
newEntries.unshift(entry)
}
const newIndex = '\n' + newEntries.map((entry) => {
const stringified = JSON.stringify(entry)
const hash = hashEntry(stringified)
return `${hash}\t${stringified}`
}).join('\n')
const setup = async () => {
const target = uniqueFilename(path.join(cache, 'tmp'), opts.tmpPrefix)
await fixOwner.mkdirfix(cache, path.dirname(target))
return {
target,
moved: false,
}
}
const teardown = async (tmp) => {
if (!tmp.moved)
return rimraf(tmp.target)
}
const write = async (tmp) => {
await writeFile(tmp.target, newIndex, { flag: 'wx' })
await fixOwner.mkdirfix(cache, path.dirname(bucket))
// we use @npmcli/move-file directly here because we
// want to overwrite the existing file
await moveFile(tmp.target, bucket)
tmp.moved = true
try {
await fixOwner.chownr(cache, bucket)
} catch (err) {
if (err.code !== 'ENOENT')
throw err
}
}
// write the file atomically
await disposer(setup(), teardown, write)
// we reverse the list we generated such that the newest
// entries come first in order to make looping through them easier
// the true passed to formatEntry tells it to keep null
// integrity values, if they made it this far it's because
// validateEntry returned true, and as such we should return it
return newEntries.reverse().map((entry) => formatEntry(cache, entry, true))
}
module.exports.insert = insert
function insert (cache, key, integrity, opts = {}) {
const { metadata, size } = opts
const bucket = bucketPath(cache, key)
const entry = {
key,
integrity: integrity && ssri.stringify(integrity),
time: Date.now(),
size,
metadata,
}
return fixOwner
.mkdirfix(cache, path.dirname(bucket))
.then(() => {
const stringified = JSON.stringify(entry)
// NOTE - Cleverness ahoy!
//
// This works because it's tremendously unlikely for an entry to corrupt
// another while still preserving the string length of the JSON in
// question. So, we just slap the length in there and verify it on read.
//
// Thanks to @isaacs for the whiteboarding session that ended up with
// this.
return appendFile(bucket, `\n${hashEntry(stringified)}\t${stringified}`)
})
.then(() => fixOwner.chownr(cache, bucket))
.catch((err) => {
if (err.code === 'ENOENT')
return undefined
throw err
// There's a class of race conditions that happen when things get deleted
// during fixOwner, or between the two mkdirfix/chownr calls.
//
// It's perfectly fine to just not bother in those cases and lie
// that the index entry was written. Because it's a cache.
})
.then(() => {
return formatEntry(cache, entry)
})
}
module.exports.insert.sync = insertSync
function insertSync (cache, key, integrity, opts = {}) {
const { metadata, size } = opts
const bucket = bucketPath(cache, key)
const entry = {
key,
integrity: integrity && ssri.stringify(integrity),
time: Date.now(),
size,
metadata,
}
fixOwner.mkdirfix.sync(cache, path.dirname(bucket))
const stringified = JSON.stringify(entry)
fs.appendFileSync(bucket, `\n${hashEntry(stringified)}\t${stringified}`)
try {
fixOwner.chownr.sync(cache, bucket)
} catch (err) {
if (err.code !== 'ENOENT')
throw err
}
return formatEntry(cache, entry)
}
module.exports.find = find
function find (cache, key) {
const bucket = bucketPath(cache, key)
return bucketEntries(bucket)
.then((entries) => {
return entries.reduce((latest, next) => {
if (next && next.key === key)
return formatEntry(cache, next)
else
return latest
}, null)
})
.catch((err) => {
if (err.code === 'ENOENT')
return null
else
throw err
})
}
module.exports.find.sync = findSync
function findSync (cache, key) {
const bucket = bucketPath(cache, key)
try {
return bucketEntriesSync(bucket).reduce((latest, next) => {
if (next && next.key === key)
return formatEntry(cache, next)
else
return latest
}, null)
} catch (err) {
if (err.code === 'ENOENT')
return null
else
throw err
}
}
module.exports.delete = del
function del (cache, key, opts = {}) {
if (!opts.removeFully)
return insert(cache, key, null, opts)
const bucket = bucketPath(cache, key)
return rimraf(bucket)
}
module.exports.delete.sync = delSync
function delSync (cache, key, opts = {}) {
if (!opts.removeFully)
return insertSync(cache, key, null, opts)
const bucket = bucketPath(cache, key)
return rimraf.sync(bucket)
}
module.exports.lsStream = lsStream
function lsStream (cache) {
const indexDir = bucketDir(cache)
const stream = new Minipass({ objectMode: true })
readdirOrEmpty(indexDir).then(buckets => Promise.all(
buckets.map(bucket => {
const bucketPath = path.join(indexDir, bucket)
return readdirOrEmpty(bucketPath).then(subbuckets => Promise.all(
subbuckets.map(subbucket => {
const subbucketPath = path.join(bucketPath, subbucket)
// "/cachename/<bucket 0xFF>/<bucket 0xFF>./*"
return readdirOrEmpty(subbucketPath).then(entries => Promise.all(
entries.map(entry => {
const entryPath = path.join(subbucketPath, entry)
return bucketEntries(entryPath).then(entries =>
// using a Map here prevents duplicate keys from
// showing up twice, I guess?
entries.reduce((acc, entry) => {
acc.set(entry.key, entry)
return acc
}, new Map())
).then(reduced => {
// reduced is a map of key => entry
for (const entry of reduced.values()) {
const formatted = formatEntry(cache, entry)
if (formatted)
stream.write(formatted)
}
}).catch(err => {
if (err.code === 'ENOENT')
return undefined
throw err
})
})
))
})
))
})
))
.then(
() => stream.end(),
err => stream.emit('error', err)
)
return stream
}
module.exports.ls = ls
function ls (cache) {
return lsStream(cache).collect().then(entries =>
entries.reduce((acc, xs) => {
acc[xs.key] = xs
return acc
}, {})
)
}
module.exports.bucketEntries = bucketEntries
function bucketEntries (bucket, filter) {
return readFile(bucket, 'utf8').then((data) => _bucketEntries(data, filter))
}
module.exports.bucketEntries.sync = bucketEntriesSync
function bucketEntriesSync (bucket, filter) {
const data = fs.readFileSync(bucket, 'utf8')
return _bucketEntries(data, filter)
}
function _bucketEntries (data, filter) {
const entries = []
data.split('\n').forEach((entry) => {
if (!entry)
return
const pieces = entry.split('\t')
if (!pieces[1] || hashEntry(pieces[1]) !== pieces[0]) {
// Hash is no good! Corruption or malice? Doesn't matter!
// EJECT EJECT
return
}
let obj
try {
obj = JSON.parse(pieces[1])
} catch (e) {
// Entry is corrupted!
return
}
if (obj)
entries.push(obj)
})
return entries
}
module.exports.bucketDir = bucketDir
function bucketDir (cache) {
return path.join(cache, `index-v${indexV}`)
}
module.exports.bucketPath = bucketPath
function bucketPath (cache, key) {
const hashed = hashKey(key)
return path.join.apply(
path,
[bucketDir(cache)].concat(hashToSegments(hashed))
)
}
module.exports.hashKey = hashKey
function hashKey (key) {
return hash(key, 'sha256')
}
module.exports.hashEntry = hashEntry
function hashEntry (str) {
return hash(str, 'sha1')
}
function hash (str, digest) {
return crypto
.createHash(digest)
.update(str)
.digest('hex')
}
function formatEntry (cache, entry, keepAll) {
// Treat null digests as deletions. They'll shadow any previous entries.
if (!entry.integrity && !keepAll)
return null
return {
key: entry.key,
integrity: entry.integrity,
path: entry.integrity ? contentPath(cache, entry.integrity) : undefined,
size: entry.size,
time: entry.time,
metadata: entry.metadata,
}
}
function readdirOrEmpty (dir) {
return readdir(dir).catch((err) => {
if (err.code === 'ENOENT' || err.code === 'ENOTDIR')
return []
throw err
})
}

73
uni-demo/node_modules/cacache/lib/memoization.js generated vendored Normal file
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'use strict'
const LRU = require('lru-cache')
const MAX_SIZE = 50 * 1024 * 1024 // 50MB
const MAX_AGE = 3 * 60 * 1000
const MEMOIZED = new LRU({
max: MAX_SIZE,
maxAge: MAX_AGE,
length: (entry, key) => key.startsWith('key:') ? entry.data.length : entry.length,
})
module.exports.clearMemoized = clearMemoized
function clearMemoized () {
const old = {}
MEMOIZED.forEach((v, k) => {
old[k] = v
})
MEMOIZED.reset()
return old
}
module.exports.put = put
function put (cache, entry, data, opts) {
pickMem(opts).set(`key:${cache}:${entry.key}`, { entry, data })
putDigest(cache, entry.integrity, data, opts)
}
module.exports.put.byDigest = putDigest
function putDigest (cache, integrity, data, opts) {
pickMem(opts).set(`digest:${cache}:${integrity}`, data)
}
module.exports.get = get
function get (cache, key, opts) {
return pickMem(opts).get(`key:${cache}:${key}`)
}
module.exports.get.byDigest = getDigest
function getDigest (cache, integrity, opts) {
return pickMem(opts).get(`digest:${cache}:${integrity}`)
}
class ObjProxy {
constructor (obj) {
this.obj = obj
}
get (key) {
return this.obj[key]
}
set (key, val) {
this.obj[key] = val
}
}
function pickMem (opts) {
if (!opts || !opts.memoize)
return MEMOIZED
else if (opts.memoize.get && opts.memoize.set)
return opts.memoize
else if (typeof opts.memoize === 'object')
return new ObjProxy(opts.memoize)
else
return MEMOIZED
}

30
uni-demo/node_modules/cacache/lib/util/disposer.js generated vendored Normal file
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'use strict'
module.exports.disposer = disposer
function disposer (creatorFn, disposerFn, fn) {
const runDisposer = (resource, result, shouldThrow = false) => {
return disposerFn(resource)
.then(
// disposer resolved, do something with original fn's promise
() => {
if (shouldThrow)
throw result
return result
},
// Disposer fn failed, crash process
(err) => {
throw err
// Or process.exit?
})
}
return creatorFn
.then((resource) => {
// fn(resource) can throw, so wrap in a promise here
return Promise.resolve().then(() => fn(resource))
.then((result) => runDisposer(resource, result))
.catch((err) => runDisposer(resource, err, true))
})
}

142
uni-demo/node_modules/cacache/lib/util/fix-owner.js generated vendored Normal file
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'use strict'
const util = require('util')
const chownr = util.promisify(require('chownr'))
const mkdirp = require('mkdirp')
const inflight = require('promise-inflight')
const inferOwner = require('infer-owner')
// Memoize getuid()/getgid() calls.
// patch process.setuid/setgid to invalidate cached value on change
const self = { uid: null, gid: null }
const getSelf = () => {
if (typeof self.uid !== 'number') {
self.uid = process.getuid()
const setuid = process.setuid
process.setuid = (uid) => {
self.uid = null
process.setuid = setuid
return process.setuid(uid)
}
}
if (typeof self.gid !== 'number') {
self.gid = process.getgid()
const setgid = process.setgid
process.setgid = (gid) => {
self.gid = null
process.setgid = setgid
return process.setgid(gid)
}
}
}
module.exports.chownr = fixOwner
function fixOwner (cache, filepath) {
if (!process.getuid) {
// This platform doesn't need ownership fixing
return Promise.resolve()
}
getSelf()
if (self.uid !== 0) {
// almost certainly can't chown anyway
return Promise.resolve()
}
return Promise.resolve(inferOwner(cache)).then((owner) => {
const { uid, gid } = owner
// No need to override if it's already what we used.
if (self.uid === uid && self.gid === gid)
return
return inflight('fixOwner: fixing ownership on ' + filepath, () =>
chownr(
filepath,
typeof uid === 'number' ? uid : self.uid,
typeof gid === 'number' ? gid : self.gid
).catch((err) => {
if (err.code === 'ENOENT')
return null
throw err
})
)
})
}
module.exports.chownr.sync = fixOwnerSync
function fixOwnerSync (cache, filepath) {
if (!process.getuid) {
// This platform doesn't need ownership fixing
return
}
const { uid, gid } = inferOwner.sync(cache)
getSelf()
if (self.uid !== 0) {
// almost certainly can't chown anyway
return
}
if (self.uid === uid && self.gid === gid) {
// No need to override if it's already what we used.
return
}
try {
chownr.sync(
filepath,
typeof uid === 'number' ? uid : self.uid,
typeof gid === 'number' ? gid : self.gid
)
} catch (err) {
// only catch ENOENT, any other error is a problem.
if (err.code === 'ENOENT')
return null
throw err
}
}
module.exports.mkdirfix = mkdirfix
function mkdirfix (cache, p, cb) {
// we have to infer the owner _before_ making the directory, even though
// we aren't going to use the results, since the cache itself might not
// exist yet. If we mkdirp it, then our current uid/gid will be assumed
// to be correct if it creates the cache folder in the process.
return Promise.resolve(inferOwner(cache)).then(() => {
return mkdirp(p)
.then((made) => {
if (made)
return fixOwner(cache, made).then(() => made)
})
.catch((err) => {
if (err.code === 'EEXIST')
return fixOwner(cache, p).then(() => null)
throw err
})
})
}
module.exports.mkdirfix.sync = mkdirfixSync
function mkdirfixSync (cache, p) {
try {
inferOwner.sync(cache)
const made = mkdirp.sync(p)
if (made) {
fixOwnerSync(cache, made)
return made
}
} catch (err) {
if (err.code === 'EEXIST') {
fixOwnerSync(cache, p)
return null
} else
throw err
}
}

7
uni-demo/node_modules/cacache/lib/util/hash-to-segments.js generated vendored Normal file
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'use strict'
module.exports = hashToSegments
function hashToSegments (hash) {
return [hash.slice(0, 2), hash.slice(2, 4), hash.slice(4)]
}

67
uni-demo/node_modules/cacache/lib/util/move-file.js generated vendored Normal file
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'use strict'
const fs = require('fs')
const util = require('util')
const chmod = util.promisify(fs.chmod)
const unlink = util.promisify(fs.unlink)
const stat = util.promisify(fs.stat)
const move = require('@npmcli/move-file')
const pinflight = require('promise-inflight')
module.exports = moveFile
function moveFile (src, dest) {
const isWindows = global.__CACACHE_TEST_FAKE_WINDOWS__ ||
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
// content their own way.
//
// Note that, as the name suggests, this strictly only supports file moves.
return new Promise((resolve, reject) => {
fs.link(src, dest, (err) => {
if (err) {
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
// really what we want to do here.
return resolve()
} else if (err.code === 'EEXIST' || err.code === 'EBUSY') {
// file already exists, so whatever
return resolve()
} else
return reject(err)
} else
return resolve()
})
})
.then(() => {
// content should never change for any reason, so make it read-only
return Promise.all([
unlink(src),
!isWindows && chmod(dest, '0444'),
])
})
.catch(() => {
return pinflight('cacache-move-file:' + dest, () => {
return stat(dest).catch((err) => {
if (err.code !== 'ENOENT') {
// Something else is wrong here. Bail bail bail
throw err
}
// file doesn't already exist! let's try a rename -> copy fallback
// only delete if it successfully copies
return move(src, dest)
})
})
})
}

35
uni-demo/node_modules/cacache/lib/util/tmp.js generated vendored Normal file
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'use strict'
const fs = require('@npmcli/fs')
const fixOwner = require('./fix-owner')
const path = require('path')
module.exports.mkdir = mktmpdir
function mktmpdir (cache, opts = {}) {
const { tmpPrefix } = opts
const tmpDir = path.join(cache, 'tmp')
return fs.mkdir(tmpDir, { recursive: true, owner: 'inherit' })
.then(() => {
// do not use path.join(), it drops the trailing / if tmpPrefix is unset
const target = `${tmpDir}${path.sep}${tmpPrefix || ''}`
return fs.mkdtemp(target, { owner: 'inherit' })
})
}
module.exports.withTmp = withTmp
function withTmp (cache, opts, cb) {
if (!cb) {
cb = opts
opts = {}
}
return fs.withTempDir(path.join(cache, 'tmp'), cb, opts)
}
module.exports.fix = fixtmpdir
function fixtmpdir (cache) {
return fixOwner(cache, path.join(cache, 'tmp'))
}

287
uni-demo/node_modules/cacache/lib/verify.js generated vendored Normal file
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'use strict'
const util = require('util')
const pMap = require('p-map')
const contentPath = require('./content/path')
const fixOwner = require('./util/fix-owner')
const fs = require('fs')
const fsm = require('fs-minipass')
const glob = util.promisify(require('glob'))
const index = require('./entry-index')
const path = require('path')
const rimraf = util.promisify(require('rimraf'))
const ssri = require('ssri')
const hasOwnProperty = (obj, key) =>
Object.prototype.hasOwnProperty.call(obj, key)
const stat = util.promisify(fs.stat)
const truncate = util.promisify(fs.truncate)
const writeFile = util.promisify(fs.writeFile)
const readFile = util.promisify(fs.readFile)
const verifyOpts = (opts) => ({
concurrency: 20,
log: { silly () {} },
...opts,
})
module.exports = verify
function verify (cache, opts) {
opts = verifyOpts(opts)
opts.log.silly('verify', 'verifying cache at', cache)
const steps = [
markStartTime,
fixPerms,
garbageCollect,
rebuildIndex,
cleanTmp,
writeVerifile,
markEndTime,
]
return steps
.reduce((promise, step, i) => {
const label = step.name
const start = new Date()
return promise.then((stats) => {
return step(cache, opts).then((s) => {
s &&
Object.keys(s).forEach((k) => {
stats[k] = s[k]
})
const end = new Date()
if (!stats.runTime)
stats.runTime = {}
stats.runTime[label] = end - start
return Promise.resolve(stats)
})
})
}, Promise.resolve({}))
.then((stats) => {
stats.runTime.total = stats.endTime - stats.startTime
opts.log.silly(
'verify',
'verification finished for',
cache,
'in',
`${stats.runTime.total}ms`
)
return stats
})
}
function markStartTime (cache, opts) {
return Promise.resolve({ startTime: new Date() })
}
function markEndTime (cache, opts) {
return Promise.resolve({ endTime: new Date() })
}
function fixPerms (cache, opts) {
opts.log.silly('verify', 'fixing cache permissions')
return fixOwner
.mkdirfix(cache, cache)
.then(() => {
// TODO - fix file permissions too
return fixOwner.chownr(cache, cache)
})
.then(() => null)
}
// Implements a naive mark-and-sweep tracing garbage collector.
//
// The algorithm is basically as follows:
// 1. Read (and filter) all index entries ("pointers")
// 2. Mark each integrity value as "live"
// 3. Read entire filesystem tree in `content-vX/` dir
// 4. If content is live, verify its checksum and delete it if it fails
// 5. If content is not marked as live, rimraf it.
//
function garbageCollect (cache, opts) {
opts.log.silly('verify', 'garbage collecting content')
const indexStream = index.lsStream(cache)
const liveContent = new Set()
indexStream.on('data', (entry) => {
if (opts.filter && !opts.filter(entry))
return
liveContent.add(entry.integrity.toString())
})
return new Promise((resolve, reject) => {
indexStream.on('end', resolve).on('error', reject)
}).then(() => {
const contentDir = contentPath.contentDir(cache)
return glob(path.join(contentDir, '**'), {
follow: false,
nodir: true,
nosort: true,
}).then((files) => {
return Promise.resolve({
verifiedContent: 0,
reclaimedCount: 0,
reclaimedSize: 0,
badContentCount: 0,
keptSize: 0,
}).then((stats) =>
pMap(
files,
(f) => {
const split = f.split(/[/\\]/)
const digest = split.slice(split.length - 3).join('')
const algo = split[split.length - 4]
const integrity = ssri.fromHex(digest, algo)
if (liveContent.has(integrity.toString())) {
return verifyContent(f, integrity).then((info) => {
if (!info.valid) {
stats.reclaimedCount++
stats.badContentCount++
stats.reclaimedSize += info.size
} else {
stats.verifiedContent++
stats.keptSize += info.size
}
return stats
})
} else {
// No entries refer to this content. We can delete.
stats.reclaimedCount++
return stat(f).then((s) => {
return rimraf(f).then(() => {
stats.reclaimedSize += s.size
return stats
})
})
}
},
{ concurrency: opts.concurrency }
).then(() => stats)
)
})
})
}
function verifyContent (filepath, sri) {
return stat(filepath)
.then((s) => {
const contentInfo = {
size: s.size,
valid: true,
}
return ssri
.checkStream(new fsm.ReadStream(filepath), sri)
.catch((err) => {
if (err.code !== 'EINTEGRITY')
throw err
return rimraf(filepath).then(() => {
contentInfo.valid = false
})
})
.then(() => contentInfo)
})
.catch((err) => {
if (err.code === 'ENOENT')
return { size: 0, valid: false }
throw err
})
}
function rebuildIndex (cache, opts) {
opts.log.silly('verify', 'rebuilding index')
return index.ls(cache).then((entries) => {
const stats = {
missingContent: 0,
rejectedEntries: 0,
totalEntries: 0,
}
const buckets = {}
for (const k in entries) {
/* istanbul ignore else */
if (hasOwnProperty(entries, k)) {
const hashed = index.hashKey(k)
const entry = entries[k]
const excluded = opts.filter && !opts.filter(entry)
excluded && stats.rejectedEntries++
if (buckets[hashed] && !excluded)
buckets[hashed].push(entry)
else if (buckets[hashed] && excluded) {
// skip
} else if (excluded) {
buckets[hashed] = []
buckets[hashed]._path = index.bucketPath(cache, k)
} else {
buckets[hashed] = [entry]
buckets[hashed]._path = index.bucketPath(cache, k)
}
}
}
return pMap(
Object.keys(buckets),
(key) => {
return rebuildBucket(cache, buckets[key], stats, opts)
},
{ concurrency: opts.concurrency }
).then(() => stats)
})
}
function rebuildBucket (cache, bucket, stats, opts) {
return truncate(bucket._path).then(() => {
// This needs to be serialized because cacache explicitly
// lets very racy bucket conflicts clobber each other.
return bucket.reduce((promise, entry) => {
return promise.then(() => {
const content = contentPath(cache, entry.integrity)
return stat(content)
.then(() => {
return index
.insert(cache, entry.key, entry.integrity, {
metadata: entry.metadata,
size: entry.size,
})
.then(() => {
stats.totalEntries++
})
})
.catch((err) => {
if (err.code === 'ENOENT') {
stats.rejectedEntries++
stats.missingContent++
return
}
throw err
})
})
}, Promise.resolve())
})
}
function cleanTmp (cache, opts) {
opts.log.silly('verify', 'cleaning tmp directory')
return rimraf(path.join(cache, 'tmp'))
}
function writeVerifile (cache, opts) {
const verifile = path.join(cache, '_lastverified')
opts.log.silly('verify', 'writing verifile to ' + verifile)
try {
return writeFile(verifile, '' + +new Date())
} finally {
fixOwner.chownr.sync(cache, verifile)
}
}
module.exports.lastRun = lastRun
function lastRun (cache) {
return readFile(path.join(cache, '_lastverified'), 'utf8').then(
(data) => new Date(+data)
)
}

6
uni-demo/node_modules/cacache/ls.js generated vendored Normal file
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'use strict'
const index = require('./lib/entry-index')
module.exports = index.ls
module.exports.stream = index.lsStream

80
uni-demo/node_modules/cacache/package.json generated vendored Normal file
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{
"name": "cacache",
"version": "15.3.0",
"cache-version": {
"content": "2",
"index": "5"
},
"description": "Fast, fault-tolerant, cross-platform, disk-based, data-agnostic, content-addressable cache.",
"main": "index.js",
"files": [
"*.js",
"lib"
],
"scripts": {
"benchmarks": "node test/benchmarks",
"preversion": "npm test",
"postversion": "npm publish",
"prepublishOnly": "git push origin --follow-tags",
"test": "tap",
"snap": "tap",
"coverage": "tap",
"test-docker": "docker run -it --rm --name pacotest -v \"$PWD\":/tmp -w /tmp node:latest npm test",
"lint": "npm run npmclilint -- \"*.*js\" \"lib/**/*.*js\" \"test/**/*.*js\"",
"npmclilint": "npmcli-lint",
"lintfix": "npm run lint -- --fix",
"postsnap": "npm run lintfix --"
},
"repository": "https://github.com/npm/cacache",
"keywords": [
"cache",
"caching",
"content-addressable",
"sri",
"sri hash",
"subresource integrity",
"cache",
"storage",
"store",
"file store",
"filesystem",
"disk cache",
"disk storage"
],
"license": "ISC",
"dependencies": {
"@npmcli/fs": "^1.0.0",
"@npmcli/move-file": "^1.0.1",
"chownr": "^2.0.0",
"fs-minipass": "^2.0.0",
"glob": "^7.1.4",
"infer-owner": "^1.0.4",
"lru-cache": "^6.0.0",
"minipass": "^3.1.1",
"minipass-collect": "^1.0.2",
"minipass-flush": "^1.0.5",
"minipass-pipeline": "^1.2.2",
"mkdirp": "^1.0.3",
"p-map": "^4.0.0",
"promise-inflight": "^1.0.1",
"rimraf": "^3.0.2",
"ssri": "^8.0.1",
"tar": "^6.0.2",
"unique-filename": "^1.1.1"
},
"devDependencies": {
"@npmcli/lint": "^1.0.1",
"benchmark": "^2.1.4",
"chalk": "^4.0.0",
"require-inject": "^1.4.4",
"tacks": "^1.3.0",
"tap": "^15.0.9"
},
"tap": {
"100": true,
"test-regex": "test/[^/]*.js"
},
"engines": {
"node": ">= 10"
}
}

83
uni-demo/node_modules/cacache/put.js generated vendored Normal file
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'use strict'
const index = require('./lib/entry-index')
const memo = require('./lib/memoization')
const write = require('./lib/content/write')
const Flush = require('minipass-flush')
const { PassThrough } = require('minipass-collect')
const Pipeline = require('minipass-pipeline')
const putOpts = (opts) => ({
algorithms: ['sha512'],
...opts,
})
module.exports = putData
function putData (cache, key, data, opts = {}) {
const { memoize } = opts
opts = putOpts(opts)
return write(cache, data, opts).then((res) => {
return index
.insert(cache, key, res.integrity, { ...opts, size: res.size })
.then((entry) => {
if (memoize)
memo.put(cache, entry, data, opts)
return res.integrity
})
})
}
module.exports.stream = putStream
function putStream (cache, key, opts = {}) {
const { memoize } = opts
opts = putOpts(opts)
let integrity
let size
let memoData
const pipeline = new Pipeline()
// first item in the pipeline is the memoizer, because we need
// that to end first and get the collected data.
if (memoize) {
const memoizer = new PassThrough().on('collect', data => {
memoData = data
})
pipeline.push(memoizer)
}
// contentStream is a write-only, not a passthrough
// no data comes out of it.
const contentStream = write.stream(cache, opts)
.on('integrity', (int) => {
integrity = int
})
.on('size', (s) => {
size = s
})
pipeline.push(contentStream)
// last but not least, we write the index and emit hash and size,
// and memoize if we're doing that
pipeline.push(new Flush({
flush () {
return index
.insert(cache, key, integrity, { ...opts, size })
.then((entry) => {
if (memoize && memoData)
memo.put(cache, entry, memoData, opts)
if (integrity)
pipeline.emit('integrity', integrity)
if (size)
pipeline.emit('size', size)
})
},
}))
return pipeline
}

31
uni-demo/node_modules/cacache/rm.js generated vendored Normal file
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'use strict'
const util = require('util')
const index = require('./lib/entry-index')
const memo = require('./lib/memoization')
const path = require('path')
const rimraf = util.promisify(require('rimraf'))
const rmContent = require('./lib/content/rm')
module.exports = entry
module.exports.entry = entry
function entry (cache, key, opts) {
memo.clearMemoized()
return index.delete(cache, key, opts)
}
module.exports.content = content
function content (cache, integrity) {
memo.clearMemoized()
return rmContent(cache, integrity)
}
module.exports.all = all
function all (cache) {
memo.clearMemoized()
return rimraf(path.join(cache, '*(content-*|index-*)'))
}

3
uni-demo/node_modules/cacache/verify.js generated vendored Normal file
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@@ -0,0 +1,3 @@
'use strict'
module.exports = require('./lib/verify')