codekingpro/portable-devtools

1const fetch = require('npm-registry-fetch')
2const { Minipass } = require('minipass')
3const Fetcher = require('./fetcher.js')
4const FileFetcher = require('./file.js')
5const _ = require('./util/protected.js')
6const pacoteVersion = require('../package.json').version
7
8class RemoteFetcher extends Fetcher {
9  constructor (spec, opts) {
10    super(spec, opts)
11    this.resolved = this.spec.fetchSpec
12    const resolvedURL = new URL(this.resolved)
13    if (this.replaceRegistryHost !== 'never'
14      && (this.replaceRegistryHost === 'always'
15      || this.replaceRegistryHost === resolvedURL.host)) {
16      this.resolved = new URL(resolvedURL.pathname, this.registry).href
17    }
18
19    // nam is a fermented pork sausage that is good to eat
20    const nameat = this.spec.name ? `${this.spec.name}@` : ''
21    this.pkgid = opts.pkgid ? opts.pkgid : `remote:${nameat}${this.resolved}`
22  }
23
24  // Don't need to cache tarball fetches in pacote, because make-fetch-happen
25  // will write into cacache anyway.
26  get [_.cacheFetches] () {
27    return false
28  }
29
30  [_.tarballFromResolved] () {
31    const stream = new Minipass()
32    stream.hasIntegrityEmitter = true
33
34    const fetchOpts = {
35      ...this.opts,
36      headers: this.#headers(),
37      spec: this.spec,
38      integrity: this.integrity,
39      algorithms: [this.pickIntegrityAlgorithm()],
40    }
41
42    // eslint-disable-next-line promise/always-return
43    fetch(this.resolved, fetchOpts).then(res => {
44      res.body.on('error',
45        /* istanbul ignore next - exceedingly rare and hard to simulate */
46        er => stream.emit('error', er)
47      )
48
49      res.body.on('integrity', i => {
50        this.integrity = i
51        stream.emit('integrity', i)
52      })
53
54      res.body.pipe(stream)
55    }).catch(er => stream.emit('error', er))
56
57    return stream
58  }
59
60  #headers () {
61    return {
62      // npm will override this, but ensure that we always send *something*
63      'user-agent': this.opts.userAgent ||
64        `pacote/${pacoteVersion} node/${process.version}`,
65      ...(this.opts.headers || {}),
66      'pacote-version': pacoteVersion,
67      'pacote-req-type': 'tarball',
68      'pacote-pkg-id': this.pkgid,
69      ...(this.integrity ? { 'pacote-integrity': String(this.integrity) }
70      : {}),
71      ...(this.opts.headers || {}),
72    }
73  }
74
75  get types () {
76    return ['remote']
77  }
78
79  // getting a packument and/or manifest is the same as with a file: spec.
80  // unpack the tarball stream, and then read from the package.json file.
81  packument () {
82    return FileFetcher.prototype.packument.apply(this)
83  }
84
85  manifest () {
86    return FileFetcher.prototype.manifest.apply(this)
87  }
88}
89module.exports = RemoteFetcher
90