summaryrefslogtreecommitdiff
path: root/deps/npm/node_modules/@npmcli/config/lib/index.js
blob: e7fac96c1c8c8f34f025218fa8f5c1366408f1a3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
// TODO: set the scope config from package.json or explicit cli config
const walkUp = require('walk-up-path')
const ini = require('ini')
const nopt = require('nopt')
const mkdirp = require('mkdirp-infer-owner')

/* istanbul ignore next */
const myUid = process.getuid && process.getuid()
/* istanbul ignore next */
const myGid = process.getgid && process.getgid()

const { resolve, dirname, join } = require('path')
const { homedir } = require('os')
const { promisify } = require('util')
const fs = require('fs')
const readFile = promisify(fs.readFile)
const writeFile = promisify(fs.writeFile)
const chmod = promisify(fs.chmod)
const chown = promisify(fs.chown)
const unlink = promisify(fs.unlink)
const stat = promisify(fs.stat)

const hasOwnProperty = (obj, key) =>
  Object.prototype.hasOwnProperty.call(obj, key)

// define a custom getter, but turn into a normal prop
// if we set it.  otherwise it can't be set on child objects
const settableGetter = (obj, key, get) => {
  Object.defineProperty(obj, key, {
    get,
    set (value) {
      Object.defineProperty(obj, key, {
        value,
        configurable: true,
        writable: true,
        enumerable: true,
      })
    },
    configurable: true,
    enumerable: true,
  })
}

const typeDefs = require('./type-defs.js')
const nerfDart = require('./nerf-dart.js')
const envReplace = require('./env-replace.js')
const parseField = require('./parse-field.js')
const typeDescription = require('./type-description.js')
const setEnvs = require('./set-envs.js')
const getUserAgent = require('./get-user-agent.js')

// types that can be saved back to
const confFileTypes = new Set([
  'global',
  'user',
  'project',
])

const confTypes = new Set([
  'default',
  'builtin',
  ...confFileTypes,
  'env',
  'cli',
])

const _loaded = Symbol('loaded')
const _get = Symbol('get')
const _find = Symbol('find')
const _loadObject = Symbol('loadObject')
const _loadFile = Symbol('loadFile')

class Config {
  static get typeDefs () {
    return typeDefs
  }

  constructor ({
    types,
    shorthands,
    defaults,
    npmPath,

    // options just to override in tests, mostly
    env = process.env,
    argv = process.argv,
    log = require('./proc-log.js'),
    platform = process.platform,
    execPath = process.execPath,
    cwd = process.cwd(),
  }) {
    this.npmPath = npmPath
    this.types = types
    this.shorthands = shorthands
    this.defaults = defaults
    this.log = log
    this.argv = argv
    this.env = env
    this.execPath = execPath
    this.platform = platform
    this.cwd = cwd

    // set when we load configs
    this.globalPrefix = null
    this.localPrefix = null

    // defaults to env.HOME, but will always be *something*
    this.home = null

    // set up the prototype chain of config objects
    const wheres = [...confTypes]
    this.data = new Map()
    let parent = null
    for (const where of wheres) {
      this.data.set(where, parent = new ConfigData(parent))
    }

    this.data.set = () => {
      throw new Error('cannot change internal config data structure')
    }
    this.data.delete = () => {
      throw new Error('cannot change internal config data structure')
    }

    this.sources = new Map([])

    this.list = []
    for (const { data } of this.data.values()) {
      this.list.unshift(data)
    }
    Object.freeze(this.list)

    this[_loaded] = false
  }

  get loaded () {
    return this[_loaded]
  }

  get prefix () {
    return this[_get]('global') ? this.globalPrefix : this.localPrefix
  }

  // return the location where key is found.
  find (key) {
    if (!this.loaded)
      throw new Error('call config.load() before reading values')
    return this[_find](key)
  }
  [_find] (key) {
    // have to look in reverse order
    const entries = [...this.data.entries()]
    for (let i = entries.length - 1; i > -1; i--) {
      const [where, { data }] = entries[i]
      if (hasOwnProperty(data, key))
        return where
    }
    return null
  }

  get (key, where) {
    if (!this.loaded)
      throw new Error('call config.load() before reading values')
    return this[_get](key, where)
  }
  // we need to get values sometimes, so use this internal one to do so
  // while in the process of loading.
  [_get] (key, where = null) {
    if (where !== null && !confTypes.has(where)) {
      throw new Error('invalid config location param: ' + where)
    }
    const { data, source } = this.data.get(where || 'cli')
    return where === null || hasOwnProperty(data, key) ? data[key] : undefined
  }

  set (key, val, where = 'cli') {
    if (!this.loaded)
      throw new Error('call config.load() before setting values')
    if (!confTypes.has(where))
      throw new Error('invalid config location param: ' + where)
    if (key === '_auth') {
      const { email } = this.getCredentialsByURI(this.get('registry'))
      if (!email)
        throw new Error('Cannot set _auth without first setting email')
    }
    this.data.get(where).data[key] = val

    // this is now dirty, the next call to this.valid will have to check it
    this.data.get(where)[_valid] = null
  }

  delete (key, where = 'cli') {
    if (!this.loaded)
      throw new Error('call config.load() before deleting values')
    if (!confTypes.has(where))
      throw new Error('invalid config location param: ' + where)
    delete this.data.get(where).data[key]
  }

  async load () {
    if (this.loaded)
      throw new Error('attempting to load npm config multiple times')

    process.emit('time', 'config:load')
    // first load the defaults, which sets the global prefix
    process.emit('time', 'config:load:defaults')
    this.loadDefaults()
    process.emit('timeEnd', 'config:load:defaults')

    // next load the builtin config, as this sets new effective defaults
    process.emit('time', 'config:load:builtin')
    await this.loadBuiltinConfig()
    process.emit('timeEnd', 'config:load:builtin')

    // cli and env are not async, and can set the prefix, relevant to project
    process.emit('time', 'config:load:cli')
    this.loadCLI()
    process.emit('timeEnd', 'config:load:cli')
    process.emit('time', 'config:load:env')
    this.loadEnv()
    process.emit('timeEnd', 'config:load:env')

    // next project config, which can affect userconfig location
    process.emit('time', 'config:load:project')
    await this.loadProjectConfig()
    process.emit('timeEnd', 'config:load:project')
    // then user config, which can affect globalconfig location
    process.emit('time', 'config:load:user')
    await this.loadUserConfig()
    process.emit('timeEnd', 'config:load:user')
    // last but not least, global config file
    process.emit('time', 'config:load:global')
    await this.loadGlobalConfig()
    process.emit('timeEnd', 'config:load:global')

    // now the extras
    process.emit('time', 'config:load:cafile')
    await this.loadCAFile()
    process.emit('timeEnd', 'config:load:cafile')

    // warn if anything is not valid
    process.emit('time', 'config:load:validate')
    this.validate()
    process.emit('timeEnd', 'config:load:validate')

    // set this before calling setEnvs, so that we don't have to share
    // symbols, as that module also does a bunch of get operations
    this[_loaded] = true

    // set proper globalPrefix now that everything is loaded
    this.globalPrefix = this.get('prefix')

    process.emit('time', 'config:load:setUserAgent')
    this.setUserAgent()
    process.emit('timeEnd', 'config:load:setUserAgent')

    process.emit('time', 'config:load:setEnvs')
    this.setEnvs()
    process.emit('timeEnd', 'config:load:setEnvs')

    process.emit('timeEnd', 'config:load')
  }

  loadDefaults () {
    this.loadGlobalPrefix()
    this.loadHome()

    this[_loadObject]({
      ...this.defaults,
      prefix: this.globalPrefix,
    }, 'default', 'default values')

    const { data } = this.data.get('default')

    // the metrics-registry defaults to the current resolved value of
    // the registry, unless overridden somewhere else.
    settableGetter(data, 'metrics-registry', () => this[_get]('registry'))

    // if the prefix is set on cli, env, or userconfig, then we need to
    // default the globalconfig file to that location, instead of the default
    // global prefix.  It's weird that `npm get globalconfig --prefix=/foo`
    // returns `/foo/etc/npmrc`, but better to not change it at this point.
    settableGetter(data, 'globalconfig', () =>
      resolve(this[_get]('prefix'), 'etc/npmrc'))
  }

  loadHome () {
    if (this.env.HOME)
      return this.home = this.env.HOME
    this.home = homedir()
  }

  loadGlobalPrefix () {
    if (this.globalPrefix)
      throw new Error('cannot load default global prefix more than once')

    if (this.env.PREFIX) {
      this.globalPrefix = this.env.PREFIX
    } else if (this.platform === 'win32') {
    // c:\node\node.exe --> prefix=c:\node\
      this.globalPrefix = dirname(this.execPath)
    } else {
      // /usr/local/bin/node --> prefix=/usr/local
      this.globalPrefix = dirname(dirname(this.execPath))

      // destdir only is respected on Unix
      if (this.env.DESTDIR)
        this.globalPrefix = join(this.env.DESTDIR, this.globalPrefix)
    }
  }

  loadEnv () {
    const prefix = 'npm_config_'
    const conf = Object.create(null)
    for (const [envKey, envVal] of Object.entries(this.env)) {
      if (!/^npm_config_/i.test(envKey) || envVal === '')
        continue
      const key = envKey.substr('npm_config_'.length)
        .replace(/(?!^)_/g, '-') // don't replace _ at the start of the key
        .toLowerCase()
      conf[key] = envVal
    }
    this[_loadObject](conf, 'env', 'environment')
  }

  loadCLI () {
    nopt.invalidHandler = (k, val, type) =>
      this.invalidHandler(k, val, type, 'command line options', 'cli')
    const conf = nopt(this.types, this.shorthands, this.argv)
    nopt.invalidHandler = null
    this.parsedArgv = conf.argv
    delete conf.argv
    this[_loadObject](conf, 'cli', 'command line options')
  }

  get valid () {
    for (const [where, {valid}] of this.data.entries()) {
      if (valid === false || valid === null && !this.validate(where))
        return false
    }
    return true
  }

  validate (where) {
    if (!where) {
      let valid = true
      for (const [where, obj] of this.data.entries()) {
        // no need to validate our defaults, we know they're fine
        // cli was already validated when parsed the first time
        if (where === 'default' || where === 'builtin' || where === 'cli')
          continue
        const ret = this.validate(where)
        valid = valid && ret
      }
      return valid
    } else {
      const obj = this.data.get(where)
      obj[_valid] = true

      nopt.invalidHandler = (k, val, type) =>
        this.invalidHandler(k, val, type, obj.source, where)

      nopt.clean(obj.data, this.types, this.typeDefs)

      nopt.invalidHandler = null
      return obj[_valid]
    }
  }

  invalidHandler (k, val, type, source, where) {
    this.log.warn(
      'invalid config',
      k + '=' + JSON.stringify(val),
      `set in ${source}`
    )
    this.data.get(where)[_valid] = false

    if (Array.isArray(type)) {
      if (type.indexOf(typeDefs.url.type) !== -1)
        type = typeDefs.url.type
      else {
        /* istanbul ignore if - no actual configs matching this, but
         * path types SHOULD be handled this way, like URLs, for the
         * same reason */
        if (type.indexOf(typeDefs.path.type) !== -1)
          type = typeDefs.path.type
      }
    }

    const typeDesc = typeDescription(type)
    const oneOrMore = typeDesc.indexOf(Array) !== -1
    const mustBe = typeDesc
      .filter(m => m !== undefined && m !== Array)
    const oneOf = mustBe.length === 1 && oneOrMore ? ' one or more'
      : mustBe.length > 1 && oneOrMore ? ' one or more of:'
      : mustBe.length > 1 ? ' one of:'
      : ''
    const msg = 'Must be' + oneOf
    const desc = mustBe.length === 1 ? mustBe[0]
      : mustBe.filter(m => m !== Array)
        .map(n => typeof n === 'string' ? n : JSON.stringify(n))
        .join(', ')
    this.log.warn('invalid config', msg, desc)
  }

  [_loadObject] (obj, where, source, er = null) {
    const conf = this.data.get(where)
    if (conf.source) {
      const m = `double-loading "${where}" configs from ${source}, ` +
        `previously loaded from ${conf.source}`
      throw new Error(m)
    }

    if (this.sources.has(source)) {
      const m = `double-loading config "${source}" as "${where}", ` +
        `previously loaded as "${this.sources.get(source)}"`
      throw new Error(m)
    }

    conf.source = source
    this.sources.set(source, where)
    if (er) {
      conf.loadError = er
      if (er.code !== 'ENOENT')
        this.log.verbose('config', `error loading ${where} config`, er)
    } else {
      conf.raw = obj
      for (const [key, value] of Object.entries(obj)) {
        const k = envReplace(key, this.env)
        const v = this.parseField(value, k)
        conf.data[k] = v
      }
    }
  }

  // Parse a field, coercing it to the best type available.
  parseField (f, key, listElement = false) {
    return parseField(f, key, this, listElement)
  }

  async [_loadFile] (file, type) {
    process.emit('time', 'config:load:file:' + file)
    // only catch the error from readFile, not from the loadObject call
    await readFile(file, 'utf8').then(
      data => this[_loadObject](ini.parse(data), type, file),
      er => this[_loadObject](null, type, file, er)
    )
    process.emit('timeEnd', 'config:load:file:' + file)
  }

  loadBuiltinConfig () {
    return this[_loadFile](resolve(this.npmPath, 'npmrc'), 'builtin')
  }

  async loadProjectConfig () {
    // the localPrefix can be set by the CLI config, but otherwise is
    // found by walking up the folder tree
    await this.loadLocalPrefix()
    const projectFile = resolve(this.localPrefix, '.npmrc')
    // if we're in the ~ directory, and there happens to be a node_modules
    // folder (which is not TOO uncommon, it turns out), then we can end
    // up loading the "project" config where the "userconfig" will be,
    // which causes some calamaties.  So, we only load project config if
    // it doesn't match what the userconfig will be.
    if (projectFile !== this[_get]('userconfig'))
      return this[_loadFile](projectFile, 'project')
    else {
      this.data.get('project').source = '(same as "user" config, ignored)'
      this.sources.set(this.data.get('project').source, 'project')
    }
  }

  async loadLocalPrefix () {
    const cliPrefix = this[_get]('prefix', 'cli')
    if (cliPrefix) {
      this.localPrefix = cliPrefix
      return
    }

    for (const p of walkUp(this.cwd)) {
      // walk up until we have a nm dir or a pj file
      const hasAny = (await Promise.all([
        stat(resolve(p, 'node_modules'))
          .then(st => st.isDirectory())
          .catch(() => false),
        stat(resolve(p, 'package.json'))
          .then(st => st.isFile())
          .catch(() => false),
      ])).some(is => is)
      if (hasAny) {
        this.localPrefix = p
        return
      }
    }

    this.localPrefix = this.cwd
  }

  loadUserConfig () {
    return this[_loadFile](this[_get]('userconfig'), 'user')
  }

  loadGlobalConfig () {
    return this[_loadFile](this[_get]('globalconfig'), 'global')
  }

  async save (where) {
    if (!this.loaded)
      throw new Error('call config.load() before saving')
    if (!confFileTypes.has(where))
      throw new Error('invalid config location param: ' + where)
    const conf = this.data.get(where)
    conf[_raw] = { ...conf.data }
    conf[_loadError] = null

    // upgrade auth configs to more secure variants before saving
    if (where === 'user') {
      const reg = this.get('registry')
      const creds = this.getCredentialsByURI(reg)
      // we ignore this error because the failed set already removed
      // anything that might be a security hazard, and it won't be
      // saved back to the .npmrc file, so we're good.
      try { this.setCredentialsByURI(reg, creds) } catch (_) {}
    }

    const iniData = ini.stringify(conf.data).trim() + '\n'
    if (!iniData.trim()) {
      // ignore the unlink error (eg, if file doesn't exist)
      await unlink(conf.source).catch(er => {})
      return
    }
    const dir = dirname(conf.source)
    await mkdirp(dir)
    await writeFile(conf.source, iniData, 'utf8')
    // don't leave a root-owned config file lying around
    /* istanbul ignore if - this is best-effort and a pita to test */
    if (myUid === 0) {
      const st = await stat(dir).catch(() => null)
      if (st && (st.uid !== myUid || st.gid !== myGid))
        await chown(conf.source, st.uid, st.gid).catch(() => {})
    }
    const mode = where === 'user' ? 0o600 : 0o666
    await chmod(conf.source, mode)
  }

  clearCredentialsByURI (uri) {
    const nerfed = nerfDart(uri)
    const def = nerfDart(this.get('registry'))
    if (def === nerfed) {
      this.delete(`-authtoken`, 'user')
      this.delete(`_authToken`, 'user')
      this.delete(`_auth`, 'user')
      this.delete(`_password`, 'user')
      this.delete(`username`, 'user')
      this.delete(`email`, 'user')
    }
    this.delete(`${nerfed}:-authtoken`, 'user')
    this.delete(`${nerfed}:_authToken`, 'user')
    this.delete(`${nerfed}:_auth`, 'user')
    this.delete(`${nerfed}:_password`, 'user')
    this.delete(`${nerfed}:username`, 'user')
    this.delete(`${nerfed}:email`, 'user')
  }

  setCredentialsByURI (uri, { token, username, password, email, alwaysAuth }) {
    const nerfed = nerfDart(uri)
    const def = nerfDart(this.get('registry'))

    if (def === nerfed) {
      // remove old style auth info not limited to a single registry
      this.delete('_password', 'user')
      this.delete('username', 'user')
      this.delete('email', 'user')
      this.delete('_auth', 'user')
      this.delete('_authtoken', 'user')
      this.delete('_authToken', 'user')
    }

    this.delete(`${nerfed}:-authtoken`)
    if (token) {
      this.set(`${nerfed}:_authToken`, token, 'user')
      this.delete(`${nerfed}:_password`, 'user')
      this.delete(`${nerfed}:username`, 'user')
      this.delete(`${nerfed}:email`, 'user')
      this.delete(`${nerfed}:always-auth`, 'user')
    } else if (username || password || email) {
      if (username || password) {
        if (!username)
          throw new Error('must include username')
        if (!password)
          throw new Error('must include password')
      }
      if (!email)
        throw new Error('must include email')
      this.delete(`${nerfed}:_authToken`, 'user')
      if (username || password) {
        this.set(`${nerfed}:username`, username, 'user')
        // note: not encrypted, no idea why we bothered to do this, but oh well
        // protects against shoulder-hacks if password is memorable, I guess?
        const encoded = Buffer.from(password, 'utf8').toString('base64')
        this.set(`${nerfed}:_password`, encoded, 'user')
      }
      this.set(`${nerfed}:email`, email, 'user')
      if (alwaysAuth !== undefined)
        this.set(`${nerfed}:always-auth`, alwaysAuth, 'user')
      else
        this.delete(`${nerfed}:always-auth`, 'user')
    } else {
      throw new Error('No credentials to set.')
    }
  }

  // this has to be a bit more complicated to support legacy data of all forms
  getCredentialsByURI (uri) {
    const nerfed = nerfDart(uri)
    const creds = {}

    // you can set always-auth for a single registry, or as a default
    const alwaysAuthReg = this.get(`${nerfed}:always-auth`)
    if (alwaysAuthReg !== undefined)
      creds.alwaysAuth = !!alwaysAuthReg
    else
      creds.alwaysAuth = this.get('always-auth')

    const email = this.get(`${nerfed}:email`) || this.get('email')
    if (email)
      creds.email = email

    const tokenReg = this.get(`${nerfed}:_authToken`) ||
      this.get(`${nerfed}:-authtoken`) ||
      nerfed === nerfDart(this.get('registry')) && this.get('_authToken')

    if (tokenReg) {
      creds.token = tokenReg
      return creds
    }

    const userReg = this.get(`${nerfed}:username`)
    const passReg = this.get(`${nerfed}:_password`)
    if (userReg && passReg) {
      creds.username = userReg
      creds.password = Buffer.from(passReg, 'base64').toString('utf8')
      const auth = `${creds.username}:${creds.password}`
      creds.auth = Buffer.from(auth, 'utf8').toString('base64')
      return creds
    }

    // at this point, we can only use the values if the URI is the
    // default registry.
    const defaultNerf = nerfDart(this.get('registry'))
    if (nerfed !== defaultNerf)
      return creds

    const userDef = this.get('username')
    const passDef = this.get('_password')
    if (userDef && passDef) {
      creds.username = userDef
      creds.password = Buffer.from(passDef, 'base64').toString('utf8')
      const auth = `${creds.username}:${creds.password}`
      creds.auth = Buffer.from(auth, 'utf8').toString('base64')
      return creds
    }

    // Handle the old-style _auth=<base64> style for the default
    // registry, if set.
    const auth = this.get('_auth')
    if (!auth)
      return creds

    const authDecode = Buffer.from(auth, 'base64').toString('utf8')
    const authSplit = authDecode.split(':')
    creds.username = authSplit.shift()
    creds.password = authSplit.join(':')
    creds.auth = auth
    return creds
  }

  async loadCAFile () {
    const where = this[_find]('cafile')

    /* istanbul ignore if - it'll always be set in the defaults */
    if (!where)
      return

    const cafile = this[_get]('cafile', where)
    const ca = this[_get]('ca', where)

    // if you have a ca, or cafile is set to null, then nothing to do here.
    if (ca || !cafile)
      return

    const raw = await readFile(cafile, 'utf8').catch(er => {
      if (er.code !== 'ENOENT')
        throw er
    })
    if (!raw)
      return

    const delim = '-----END CERTIFICATE-----'
    const output = raw.replace(/\r\n/g, '\n').split(delim)
      .filter(section => section.trim())
      .map(section => section.trimLeft() + delim)

    // make it non-enumerable so we don't save it back by accident
    const { data } = this.data.get(where)
    Object.defineProperty(data, 'ca', {
      value: output,
      enumerable: false,
      configurable: true,
      writable: true,
    })
  }

  // the user-agent configuration is a template that gets populated
  // with some variables, that takes place here
  setUserAgent () {
    this.set('user-agent', getUserAgent(this))
  }

  // set up the environment object we have with npm_config_* environs
  // for all configs that are different from their default values, and
  // set EDITOR and HOME.
  setEnvs () { setEnvs(this) }
}

const _data = Symbol('data')
const _raw = Symbol('raw')
const _loadError = Symbol('loadError')
const _source = Symbol('source')
const _valid = Symbol('valid')
class ConfigData {
  constructor (parent) {
    this[_data] = Object.create(parent && parent.data)
    this[_source] = null
    this[_loadError] = null
    this[_raw] = null
    this[_valid] = true
  }

  get data () {
    return this[_data]
  }

  get valid () {
    return this[_valid]
  }

  set source (s) {
    if (this[_source])
      throw new Error('cannot set ConfigData source more than once')
    this[_source] = s
  }
  get source () { return this[_source] }

  set loadError (e) {
    if (this[_loadError] || this[_raw])
      throw new Error('cannot set ConfigData loadError after load')
    this[_loadError] = e
  }
  get loadError () { return this[_loadError] }

  set raw (r) {
    if (this[_raw] || this[_loadError])
      throw new Error('cannot set ConfigData raw after load')
    this[_raw] = r
  }
  get raw () { return this[_raw] }
}

module.exports = Config