1 | const pathRoot = require('path')
|
2 | const path = pathRoot.posix || pathRoot
|
3 | const { EventEmitter } = require('events')
|
4 |
|
5 | const collect = require('stream-collector')
|
6 | const thunky = require('thunky')
|
7 | const ThunkyMap = require('thunky-map')
|
8 | const unixify = require('unixify')
|
9 | const duplexify = require('duplexify')
|
10 | const through = require('through2')
|
11 | const pumpify = require('pumpify')
|
12 | const pump = require('pump')
|
13 |
|
14 | const coreByteStream = require('hypercore-byte-stream')
|
15 | const Nanoresource = require('nanoresource/emitter')
|
16 | const HypercoreProtocol = require('hypercore-protocol')
|
17 | const MountableHypertrie = require('mountable-hypertrie')
|
18 | const Corestore = require('corestore')
|
19 | const { Stat } = require('hyperdrive-schemas')
|
20 |
|
21 | const createFileDescriptor = require('./lib/fd')
|
22 | const errors = require('./lib/errors')
|
23 | const defaultCorestore = require('./lib/storage')
|
24 | const TagManager = require('./lib/tagging')
|
25 | const { contentKeyPair, contentOptions, ContentState } = require('./lib/content')
|
26 | const { statIterator, createStatStream, createMountStream, createReaddirStream, readdirIterator } = require('./lib/iterator')
|
27 |
|
28 |
|
29 | const STDIO_CAP = 20
|
30 | const WRITE_STREAM_BLOCK_SIZE = 524288
|
31 |
|
32 | module.exports = (...args) => new Hyperdrive(...args)
|
33 | module.exports.constants = require('filesystem-constants').linux
|
34 |
|
35 | class Hyperdrive extends Nanoresource {
|
36 | constructor (storage, key, opts) {
|
37 | super()
|
38 |
|
39 | if (isObject(key)) {
|
40 | opts = key
|
41 | key = null
|
42 | }
|
43 | if (!opts) opts = {}
|
44 |
|
45 | this.opts = opts
|
46 | this.key = key
|
47 | this.discoveryKey = null
|
48 | this.live = true
|
49 | this.sparse = opts.sparse !== false
|
50 | this.sparseMetadata = opts.sparseMetadata !== false
|
51 |
|
52 | this._namespace = opts.namespace
|
53 | this.corestore = defaultCorestore(storage, {
|
54 | ...opts,
|
55 | valueEncoding: 'binary',
|
56 |
|
57 | sparse: this.sparse || this.sparseMetadata,
|
58 | extensions: opts.extensions
|
59 | })
|
60 |
|
61 | if (this.corestore !== storage) this.corestore.on('error', err => this.emit('error', err))
|
62 | if (opts.namespace) {
|
63 | this.corestore = this.corestore.namespace(opts.namespace)
|
64 | }
|
65 |
|
66 |
|
67 | this.metadata = null
|
68 | this.db = opts._db
|
69 | this.tags = new TagManager(this)
|
70 | this.isCheckout = !!this.db
|
71 |
|
72 | this._contentStates = opts._contentStates || new ThunkyMap(this._contentStateFromMetadata.bind(this))
|
73 | this._fds = []
|
74 | this._writingFds = new Map()
|
75 | this._unlistens = []
|
76 | this._unmirror = null
|
77 |
|
78 | this._metadataOpts = {
|
79 | key,
|
80 | sparse: this.sparseMetadata,
|
81 | keyPair: opts.keyPair,
|
82 | extensions: opts.extensions
|
83 | }
|
84 |
|
85 | this.ready(onReady)
|
86 |
|
87 | const self = this
|
88 |
|
89 | function onReady (err) {
|
90 | if (err) return self.emit('error', err)
|
91 | self.emit('ready')
|
92 |
|
93 | if (self._contentStates.has(self.db.feed)) return
|
94 | self._getContent(self.db.feed, noop)
|
95 | }
|
96 | }
|
97 |
|
98 | get version () {
|
99 |
|
100 | return this.db.version
|
101 | }
|
102 |
|
103 | get writable () {
|
104 | return this.metadata.writable
|
105 | }
|
106 |
|
107 | get contentWritable () {
|
108 | const contentState = this._contentStates.cache.get(this.db.feed)
|
109 | if (!contentState) return false
|
110 | return contentState.feed.writable
|
111 | }
|
112 |
|
113 | ready (cb) {
|
114 | return this.open(cb)
|
115 | }
|
116 |
|
117 | _open (cb) {
|
118 | const self = this
|
119 | return this.corestore.ready(err => {
|
120 | if (err) return cb(err)
|
121 | this.metadata = this.corestore.default(this._metadataOpts)
|
122 | this.metadata.ifAvailable.wait()
|
123 | this.db = this.db || new MountableHypertrie(this.corestore, this.key, {
|
124 | feed: this.metadata,
|
125 | sparse: this.sparseMetadata
|
126 | })
|
127 | this.db.on('hypertrie', onhypertrie)
|
128 | this.db.on('error', onerror)
|
129 |
|
130 | self.metadata.on('error', onerror)
|
131 | self.metadata.on('append', update)
|
132 | self.metadata.on('extension', extension)
|
133 | self.metadata.on('peer-add', peeradd)
|
134 | self.metadata.on('peer-remove', peerremove)
|
135 |
|
136 | this._unlistens.push(() => {
|
137 | self.db.removeListener('error', onerror)
|
138 | self.db.removeListener('hypertrie', onhypertrie)
|
139 | self.metadata.removeListener('error', onerror)
|
140 | self.metadata.removeListener('append', update)
|
141 | self.metadata.removeListener('extension', extension)
|
142 | self.metadata.removeListener('peer-add', peeradd)
|
143 | self.metadata.removeListener('peer-remove', peerremove)
|
144 | })
|
145 |
|
146 | return self.metadata.ready(err => {
|
147 | if (err) return done(err)
|
148 |
|
149 | |
150 |
|
151 |
|
152 |
|
153 |
|
154 |
|
155 |
|
156 |
|
157 |
|
158 |
|
159 | if (self.metadata.writable && !self.metadata.length && !self.isCheckout) {
|
160 | initialize()
|
161 | } else {
|
162 | restore()
|
163 | }
|
164 | })
|
165 | })
|
166 |
|
167 | |
168 |
|
169 |
|
170 | function initialize () {
|
171 | self._contentStateFromKey(null, (err, contentState) => {
|
172 | if (err) return done(err)
|
173 |
|
174 | self._contentStates.cache.set(self.db.feed, contentState)
|
175 | self.db.setMetadata(contentState.feed.key)
|
176 | self.db.ready(err => {
|
177 | if (err) return done(err)
|
178 | return done(null)
|
179 | })
|
180 | })
|
181 | }
|
182 |
|
183 | |
184 |
|
185 |
|
186 |
|
187 |
|
188 | function restore (keyPair) {
|
189 | self.db.ready(err => {
|
190 | if (err) return done(err)
|
191 | if (self.metadata.has(0)) self._getContent(self.db.feed, done)
|
192 | else done(null)
|
193 | })
|
194 | }
|
195 |
|
196 | function done (err) {
|
197 | self.metadata.ifAvailable.continue()
|
198 | if (err) return cb(err)
|
199 | self.key = self.metadata.key
|
200 | self.discoveryKey = self.metadata.discoveryKey
|
201 | return cb(null)
|
202 | }
|
203 |
|
204 | function onerror (err) {
|
205 | if (err) self.emit('error', err)
|
206 | return cb(err)
|
207 | }
|
208 |
|
209 | function update () {
|
210 | self.emit('update')
|
211 | }
|
212 |
|
213 | function extension(name, message, peer) {
|
214 | self.emit('extension', name, message, peer)
|
215 | }
|
216 |
|
217 | function peeradd(peer) {
|
218 | self.emit('peer-add', peer)
|
219 | }
|
220 |
|
221 | function peerremove(peer) {
|
222 | self.emit('peer-remove', peer)
|
223 | }
|
224 |
|
225 | function onhypertrie (trie) {
|
226 | self.emit('metadata-feed', trie.feed)
|
227 | self.emit('mount', trie)
|
228 | }
|
229 | }
|
230 |
|
231 | _getContent (metadata, cb) {
|
232 | this._contentStates.get(metadata, cb)
|
233 | }
|
234 |
|
235 | _contentStateFromMetadata (metadata, cb) {
|
236 | MountableHypertrie.getMetadata(metadata, (err, publicKey) => {
|
237 | if (err) return cb(err)
|
238 | this._contentStateFromKey(publicKey, cb)
|
239 | })
|
240 | }
|
241 |
|
242 | _contentStateFromKey (publicKey, cb) {
|
243 | const contentOpts = { key: publicKey, ...contentOptions(this), cache: { data: false } }
|
244 | try {
|
245 | var feed = this.corestore.get(contentOpts)
|
246 | } catch (err) {
|
247 | return cb(err)
|
248 | }
|
249 |
|
250 | const contentErrorListener = err => this.emit('error', err)
|
251 | feed.on('error', contentErrorListener)
|
252 | this._unlistens.push(() => feed.removeListener('error', contentErrorListener))
|
253 | feed.ready(err => {
|
254 | if (err) return cb(err)
|
255 | this.emit('content-feed', feed)
|
256 | return cb(null, new ContentState(feed))
|
257 | })
|
258 | }
|
259 |
|
260 | _putStat (name, stat, opts, cb) {
|
261 | if (typeof opts === 'function') return this._putStat(name, stat, null, opts)
|
262 | try {
|
263 | var encoded = stat.encode()
|
264 | } catch (err) {
|
265 | return cb(err)
|
266 | }
|
267 | this.db.put(name, encoded, opts, err => {
|
268 | if (err) return cb(err)
|
269 | return cb(null, stat)
|
270 | })
|
271 | }
|
272 |
|
273 | _update (name, stat, cb) {
|
274 | name = fixName(name)
|
275 |
|
276 | this.db.get(name, (err, st) => {
|
277 | if (err) return cb(err)
|
278 | if (!st) return cb(new errors.FileNotFound(name))
|
279 | try {
|
280 | var decoded = Stat.decode(st.value)
|
281 | } catch (err) {
|
282 | return cb(err)
|
283 | }
|
284 | const oldMetadata = decoded.metadata
|
285 | const newStat = Object.assign(decoded, stat)
|
286 | if (stat.metadata) {
|
287 | newStat.metadata = Object.assign({}, oldMetadata || {}, stat.metadata)
|
288 | }
|
289 | return this._putStat(name, newStat, { flags: st.flags }, cb)
|
290 | })
|
291 | }
|
292 |
|
293 | _upsert (name, stat, cb) {
|
294 | name = fixName(name)
|
295 |
|
296 | this.db.get(name, (err, st) => {
|
297 | if (err) return cb(err)
|
298 | if (!st) {
|
299 | var decoded = Stat.file()
|
300 | }
|
301 | else {
|
302 | try {
|
303 | var decoded = Stat.decode(st.value)
|
304 | } catch (err) {
|
305 | return cb(err)
|
306 | }
|
307 | }
|
308 | const oldMetadata = decoded.metadata
|
309 | const newStat = Object.assign(decoded, stat)
|
310 | if (stat.metadata) {
|
311 | newStat.metadata = Object.assign({}, oldMetadata || {}, stat.metadata)
|
312 | }
|
313 | return this._putStat(name, newStat, { flags: st ? st.flags : 0 }, cb)
|
314 | })
|
315 | }
|
316 |
|
317 | getContent (cb) {
|
318 | if (!this.db) return cb(null, null)
|
319 | this._getContent(this.db.feed, (err, contentState) => {
|
320 | if (err) return cb(err)
|
321 | return cb(null, contentState.feed)
|
322 | })
|
323 | }
|
324 |
|
325 | open (name, flags, cb) {
|
326 | if (!name || typeof name === 'function') return super.open(name)
|
327 | name = fixName(name)
|
328 |
|
329 | this.ready(err => {
|
330 | if (err) return cb(err)
|
331 | createFileDescriptor(this, name, flags, (err, fd) => {
|
332 | if (err) return cb(err)
|
333 | cb(null, STDIO_CAP + (this._fds.push(fd) - 1) * 2)
|
334 | })
|
335 | })
|
336 | }
|
337 |
|
338 | read (fd, buf, offset, len, pos, cb) {
|
339 | if (typeof pos === 'function') {
|
340 | cb = pos
|
341 | pos = null
|
342 | }
|
343 |
|
344 | const desc = this._fds[(fd - STDIO_CAP) / 2]
|
345 | if (!desc) return process.nextTick(cb, new errors.BadFileDescriptor(`Bad file descriptor: ${fd}`))
|
346 | if (pos == null) pos = desc.position
|
347 | desc.read(buf, offset, len, pos, cb)
|
348 | }
|
349 |
|
350 | write (fd, buf, offset, len, pos, cb) {
|
351 | if (typeof pos === 'function') {
|
352 | cb = pos
|
353 | pos = null
|
354 | }
|
355 |
|
356 | const desc = this._fds[(fd - STDIO_CAP) / 2]
|
357 | if (!desc) return process.nextTick(cb, new errors.BadFileDescriptor(`Bad file descriptor: ${fd}`))
|
358 | if (pos == null) pos = desc.position
|
359 | desc.write(buf, offset, len, pos, cb)
|
360 | }
|
361 |
|
362 | createReadStream (name, opts) {
|
363 | if (!opts) opts = {}
|
364 | const self = this
|
365 |
|
366 | name = fixName(name)
|
367 |
|
368 | const length = typeof opts.end === 'number' ? 1 + opts.end - (opts.start || 0) : typeof opts.length === 'number' ? opts.length : -1
|
369 | const stream = coreByteStream({
|
370 | ...opts,
|
371 | highWaterMark: opts.highWaterMark || 64 * 1024
|
372 | })
|
373 |
|
374 | this.ready(err => {
|
375 | if (err) return stream.destroy(err)
|
376 | return this.stat(name, { file: true }, (err, st, trie) => {
|
377 | if (err) return stream.destroy(err)
|
378 | if (st.mount && st.mount.hypercore) {
|
379 | const feed = self.corestore.get({
|
380 | key: st.mount.key,
|
381 | sparse: self.sparse
|
382 | })
|
383 | return feed.ready(err => {
|
384 | if (err) return stream.destroy(err)
|
385 | st.blocks = feed.length
|
386 | return oncontent(st, { feed })
|
387 | })
|
388 | }
|
389 | return this._getContent(trie.feed, (err, contentState) => {
|
390 | if (err) return stream.destroy(err)
|
391 | return oncontent(st, contentState)
|
392 | })
|
393 | })
|
394 | })
|
395 |
|
396 | function oncontent (st, contentState) {
|
397 | if (st.mount && st.mount.hypercore) {
|
398 | var byteOffset = 0
|
399 | var blockOffset = 0
|
400 | var blockLength = st.blocks
|
401 | } else {
|
402 | blockOffset = st.offset
|
403 | blockLength = st.blocks
|
404 | byteOffset = opts.start ? st.byteOffset + opts.start : (length === -1 ? -1 : st.byteOffset)
|
405 | }
|
406 |
|
407 | const byteLength = length
|
408 |
|
409 | stream.start({
|
410 | feed: contentState.feed,
|
411 | blockOffset,
|
412 | blockLength,
|
413 | byteOffset,
|
414 | byteLength
|
415 | })
|
416 | }
|
417 |
|
418 | return stream
|
419 | }
|
420 |
|
421 | createDiffStream (other, prefix, opts) {
|
422 | if (other instanceof Hyperdrive) other = other.version
|
423 | if (typeof prefix === 'object') return this.createDiffStream(other, '/', prefix)
|
424 | prefix = prefix || '/'
|
425 |
|
426 | const diffStream = this.db.createDiffStream(other, prefix, opts)
|
427 | return pumpify.obj(
|
428 | diffStream,
|
429 | through.obj((chunk, enc, cb) => {
|
430 | const entry = { type: chunk.type, name: chunk.key }
|
431 | if (chunk.left) entry.seq = chunk.left.seq
|
432 | if (chunk.right) entry.previous = { seq: chunk.right.seq }
|
433 | if (chunk.left && entry.type !== 'mount' && entry.type !== 'unmount') {
|
434 | try {
|
435 | entry.value = Stat.decode(chunk.left.value)
|
436 | } catch (err) {
|
437 | return cb(err)
|
438 | }
|
439 | } else if (chunk.left) {
|
440 | entry.value = chunk.left.info
|
441 | }
|
442 | return cb(null, entry)
|
443 | })
|
444 | )
|
445 | }
|
446 |
|
447 | createDirectoryStream (name, opts) {
|
448 | if (!opts) opts = {}
|
449 | name = fixName(name)
|
450 | return createStatStream(this, name, opts)
|
451 | }
|
452 |
|
453 | createWriteStream (name, opts) {
|
454 | if (!opts) opts = {}
|
455 | name = fixName(name)
|
456 |
|
457 | const self = this
|
458 | var release
|
459 |
|
460 | const proxy = duplexify()
|
461 | proxy.setReadable(false)
|
462 |
|
463 |
|
464 |
|
465 | this.ready(err => {
|
466 | if (err) return proxy.destroy(err)
|
467 | this.stat(name, { trie: true }, (err, stat, trie) => {
|
468 | if (err && (err.errno !== 2)) return proxy.destroy(err)
|
469 | this._getContent(trie.feed, (err, contentState) => {
|
470 | if (err) return proxy.destroy(err)
|
471 | if (opts.wait === false && contentState.isLocked()) return cb(new Error('Content is locked.'))
|
472 | contentState.lock(_release => {
|
473 | release = _release
|
474 | append(contentState)
|
475 | })
|
476 | })
|
477 | })
|
478 | })
|
479 |
|
480 | return proxy
|
481 |
|
482 | function append (contentState) {
|
483 | if (proxy.destroyed) return release()
|
484 |
|
485 | const byteOffset = contentState.feed.byteLength
|
486 | const offset = contentState.feed.length
|
487 |
|
488 | self.emit('appending', name, opts)
|
489 |
|
490 |
|
491 | const stream = contentState.feed.createWriteStream({ maxBlockSize: WRITE_STREAM_BLOCK_SIZE })
|
492 |
|
493 | proxy.on('close', ondone)
|
494 | proxy.on('finish', ondone)
|
495 |
|
496 | proxy.setWritable(stream)
|
497 | proxy.on('prefinish', function () {
|
498 | const stat = Stat.file({
|
499 | ...opts,
|
500 | offset,
|
501 | byteOffset,
|
502 | size: contentState.feed.byteLength - byteOffset,
|
503 | blocks: contentState.feed.length - offset
|
504 | })
|
505 | proxy.cork()
|
506 | self._putStat(name, stat, function (err) {
|
507 | if (err) return proxy.destroy(err)
|
508 | self.emit('append', name, opts)
|
509 | proxy.uncork()
|
510 | })
|
511 | })
|
512 | }
|
513 |
|
514 | function ondone () {
|
515 | proxy.removeListener('close', ondone)
|
516 | proxy.removeListener('finish', ondone)
|
517 | release()
|
518 | }
|
519 | }
|
520 |
|
521 | create (name, opts, cb) {
|
522 | if (typeof opts === 'function') return this.create(name, null, opts)
|
523 |
|
524 | name = fixName(name)
|
525 |
|
526 | this.ready(err => {
|
527 | if (err) return cb(err)
|
528 | this.lstat(name, { file: true, trie: true }, (err, stat) => {
|
529 | if (err && err.errno !== 2) return cb(err)
|
530 | if (stat) return cb(null, stat)
|
531 | const st = Stat.file(opts)
|
532 | return this._putStat(name, st, cb)
|
533 | })
|
534 | })
|
535 | }
|
536 |
|
537 | readFile (name, opts, cb) {
|
538 | if (typeof opts === 'function') return this.readFile(name, null, opts)
|
539 | if (typeof opts === 'string') opts = { encoding: opts }
|
540 | if (!opts) opts = {}
|
541 |
|
542 | name = fixName(name)
|
543 |
|
544 | collect(this.createReadStream(name, opts), function (err, bufs) {
|
545 | if (err) return cb(err)
|
546 | let buf = bufs.length === 1 ? bufs[0] : Buffer.concat(bufs)
|
547 | cb(null, opts.encoding && opts.encoding !== 'binary' ? buf.toString(opts.encoding) : buf)
|
548 | })
|
549 | }
|
550 |
|
551 | writeFile (name, buf, opts, cb) {
|
552 | if (typeof opts === 'function') return this.writeFile(name, buf, null, opts)
|
553 | if (typeof opts === 'string') opts = { encoding: opts }
|
554 | if (!opts) opts = {}
|
555 | if (typeof buf === 'string') buf = Buffer.from(buf, opts.encoding || 'utf-8')
|
556 | if (!cb) cb = noop
|
557 |
|
558 | name = fixName(name)
|
559 |
|
560 |
|
561 | let stream = this.createWriteStream(name, opts)
|
562 |
|
563 |
|
564 | var errored = false
|
565 |
|
566 | stream.on('error', err => {
|
567 | errored = true
|
568 | return cb(err)
|
569 | })
|
570 | stream.on('finish', () => {
|
571 | if (!errored) return cb(null)
|
572 | })
|
573 | stream.end(buf)
|
574 | }
|
575 |
|
576 | truncate (name, size, cb) {
|
577 | name = fixName(name)
|
578 |
|
579 | this.lstat(name, { file: true, trie: true }, (err, st) => {
|
580 | if (err && err.errno !== 2) return cb(err)
|
581 | if (!st || !size) return this.create(name, cb)
|
582 | if (size === st.size) return cb(null)
|
583 | if (size < st.size) {
|
584 | const readStream = this.createReadStream(name, { length: size })
|
585 | const writeStream = this.createWriteStream(name)
|
586 | return pump(readStream, writeStream, cb)
|
587 | } else {
|
588 | this.open(name, 'a', (err, fd) => {
|
589 | if (err) return cb(err)
|
590 | const length = size - st.size
|
591 | this.write(fd, Buffer.alloc(length), 0, length, st.size, err => {
|
592 | if (err) return cb(err)
|
593 | this.close(fd, cb)
|
594 | })
|
595 | })
|
596 | }
|
597 | })
|
598 | }
|
599 |
|
600 | ftruncate (fd, size, cb) {
|
601 | const desc = this._fds[(fd - STDIO_CAP) / 2]
|
602 | if (!desc) return process.nextTick(cb, new errors.BadFileDescriptor(`Bad file descriptor: ${fd}`))
|
603 | return desc.truncate(size, cb)
|
604 | }
|
605 |
|
606 | _createStat (name, opts, cb) {
|
607 | const self = this
|
608 |
|
609 | const statConstructor = (opts && opts.directory) ? Stat.directory : Stat.file
|
610 | const shouldForce = !!opts.force
|
611 |
|
612 | this.ready(err => {
|
613 | if (err) return cb(err)
|
614 | this.db.get(name, (err, node, trie) => {
|
615 | if (err) return cb(err)
|
616 | if (node && !shouldForce) return cb(new errors.PathAlreadyExists(name))
|
617 | onexisting(node, trie)
|
618 | })
|
619 | })
|
620 |
|
621 | function onexisting (node, trie) {
|
622 | self.ready(err => {
|
623 | if (err) return cb(err)
|
624 | self._getContent(trie.feed, (err, contentState) => {
|
625 | if (err) return cb(err)
|
626 | const st = statConstructor({
|
627 | ...opts,
|
628 | offset: contentState.feed.length,
|
629 | byteOffset: contentState.feed.byteLength
|
630 | })
|
631 | return cb(null, st)
|
632 | })
|
633 | })
|
634 | }
|
635 | }
|
636 |
|
637 | mkdir (name, opts, cb) {
|
638 | if (typeof opts === 'function') return this.mkdir(name, null, opts)
|
639 | if (typeof opts === 'number') opts = { mode: opts }
|
640 | if (!opts) opts = {}
|
641 | if (!cb) cb = noop
|
642 |
|
643 | name = fixName(name)
|
644 | opts.directory = true
|
645 |
|
646 | this._createStat(name, opts, (err, st) => {
|
647 | if (err) return cb(err)
|
648 | this._putStat(name, st, {
|
649 | condition: ifNotExists
|
650 | }, cb)
|
651 | })
|
652 | }
|
653 |
|
654 | _statDirectory (name, opts, cb) {
|
655 | const ite = this.db.iterator(name)
|
656 | ite.next((err, st) => {
|
657 | if (err) return cb(err)
|
658 | if (name !== '/' && !st) return cb(new errors.FileNotFound(name))
|
659 | if (name === '/') return cb(null, Stat.directory(), this.db)
|
660 | const trie = st[MountableHypertrie.Symbols.TRIE]
|
661 | const mount = st[MountableHypertrie.Symbols.MOUNT]
|
662 | const innerPath = st[MountableHypertrie.Symbols.INNER_PATH]
|
663 | try {
|
664 | st = Stat.decode(st.value)
|
665 | } catch (err) {
|
666 | return cb(err)
|
667 | }
|
668 | const noMode = Object.assign({}, st, { mode: 0 })
|
669 | return cb(null, Stat.directory(noMode), trie, mount, innerPath)
|
670 | })
|
671 | }
|
672 |
|
673 | readlink (name, cb) {
|
674 | this.lstat(name, function (err, st) {
|
675 | if (err) return cb(err)
|
676 | cb(null, st.linkname)
|
677 | })
|
678 | }
|
679 |
|
680 | lstat (name, opts, cb) {
|
681 | if (typeof opts === 'function') return this.lstat(name, null, opts)
|
682 | if (!opts) opts = {}
|
683 | const self = this
|
684 | name = fixName(name)
|
685 |
|
686 | this.ready(err => {
|
687 | if (err) return cb(err)
|
688 | this.db.get(name, opts, onstat)
|
689 | })
|
690 |
|
691 | function onstat (err, node, trie, mount, mountPath) {
|
692 | if (err) return cb(err)
|
693 | if (!node && opts.trie) return cb(null, null, trie, mount, mountPath)
|
694 | if (!node && opts.file) return cb(new errors.FileNotFound(name))
|
695 | if (!node) return self._statDirectory(name, opts, cb)
|
696 | try {
|
697 | var st = Stat.decode(node.value)
|
698 | } catch (err) {
|
699 | return cb(err)
|
700 | }
|
701 | const writingFd = self._writingFds.get(name)
|
702 | if (writingFd) {
|
703 | st.size = writingFd.stat.size
|
704 | }
|
705 | cb(null, st, trie, mount, mountPath)
|
706 | }
|
707 | }
|
708 |
|
709 | stat (name, opts, cb) {
|
710 | if (typeof opts === 'function') return this.stat(name, null, opts)
|
711 | if (!opts) opts = {}
|
712 |
|
713 | this.lstat(name, opts, (err, stat, trie, mount, mountPath) => {
|
714 | if (err) return cb(err)
|
715 | if (!stat) return cb(null, null, trie, name, mount, mountPath)
|
716 | if (stat.linkname) {
|
717 | if (path.isAbsolute(stat.linkname)) return this.stat(stat.linkname, opts, cb)
|
718 | const relativeStat = path.resolve('/', path.dirname(name), stat.linkname)
|
719 | return this.stat(relativeStat, opts, cb)
|
720 | }
|
721 | return cb(null, stat, trie, name, mount, mountPath)
|
722 | })
|
723 | }
|
724 |
|
725 | access (name, opts, cb) {
|
726 | if (typeof opts === 'function') return this.access(name, null, opts)
|
727 | if (!opts) opts = {}
|
728 | name = fixName(name)
|
729 |
|
730 | this.stat(name, opts, err => {
|
731 | cb(err)
|
732 | })
|
733 | }
|
734 |
|
735 | exists (name, opts, cb) {
|
736 | if (typeof opts === 'function') return this.exists(name, null, opts)
|
737 | if (!opts) opts = {}
|
738 |
|
739 | this.access(name, opts, err => {
|
740 | cb(!err)
|
741 | })
|
742 | }
|
743 |
|
744 | readdir (name, opts, cb) {
|
745 | if (typeof opts === 'function') return this.readdir(name, null, opts)
|
746 | name = fixName(name)
|
747 |
|
748 | const readdirStream = createReaddirStream(this, name, opts)
|
749 | return collect(readdirStream, (err, entries) => {
|
750 | if (err) return cb(err)
|
751 | return cb(null, entries)
|
752 | })
|
753 | }
|
754 |
|
755 | _del (name, cb) {
|
756 | this.ready(err => {
|
757 | if (err) return cb(err)
|
758 | this.db.del(name, (err, node) => {
|
759 | if (err) return cb(err)
|
760 | if (!node) return cb(new errors.FileNotFound(name))
|
761 | return cb(null)
|
762 | })
|
763 | })
|
764 | }
|
765 |
|
766 | unlink (name, cb) {
|
767 | name = fixName(name)
|
768 | this._del(name, cb || noop)
|
769 | }
|
770 |
|
771 | rmdir (name, cb) {
|
772 | if (!cb) cb = noop
|
773 | name = fixName(name)
|
774 | const self = this
|
775 |
|
776 | const ite = readdirIterator(this, name)
|
777 | ite.next((err, val) => {
|
778 | if (err) return cb(err)
|
779 | if (val) return cb(new errors.DirectoryNotEmpty(name))
|
780 | self._del(name, cb)
|
781 | })
|
782 | }
|
783 |
|
784 | replicate (isInitiator, opts) {
|
785 |
|
786 | if (typeof isInitiator === 'object' && isInitiator && !opts) {
|
787 | opts = isInitiator
|
788 | isInitiator = !!opts.initiator
|
789 | }
|
790 | const stream = (opts && opts.stream) || new HypercoreProtocol(isInitiator, { ...opts })
|
791 | this.ready(err => {
|
792 | if (err) return stream.destroy(err)
|
793 | this.corestore.replicate(isInitiator, { ...opts, stream })
|
794 | })
|
795 | return stream
|
796 | }
|
797 |
|
798 | checkout (version, opts) {
|
799 | opts = {
|
800 | ...opts,
|
801 | _db: this.db.checkout(version),
|
802 | _contentStates: this._contentStates,
|
803 | }
|
804 | return new Hyperdrive(this.corestore, this.key, opts)
|
805 | }
|
806 |
|
807 | _closeFile (fd, cb) {
|
808 | const idx = (fd - STDIO_CAP) / 2
|
809 | const desc = this._fds[idx]
|
810 | if (!desc) return process.nextTick(cb, new Error('Invalid file descriptor'))
|
811 | this._fds[idx] = null
|
812 | while (this._fds.length && !this._fds[this._fds.length - 1]) this._fds.pop()
|
813 | desc.close(cb)
|
814 | }
|
815 |
|
816 | _close (cb) {
|
817 | this.db.close(err => {
|
818 | for (const unlisten of this._unlistens) {
|
819 | unlisten()
|
820 | }
|
821 | this._unlistens = []
|
822 | this.emit('close')
|
823 | cb(err)
|
824 | })
|
825 | }
|
826 |
|
827 | close (fd, cb) {
|
828 | if (typeof fd === 'number') return this._closeFile(fd, cb || noop)
|
829 | super.close(false, fd)
|
830 | }
|
831 |
|
832 | destroyStorage (cb) {
|
833 | const metadata = this.db.feed
|
834 | this._getContent(metadata, (err, contentState) => {
|
835 | const content = contentState.feed
|
836 | metadata.destroyStorage(() => {
|
837 | content.destroyStorage(() => {
|
838 | this.close(cb)
|
839 | })
|
840 | })
|
841 | })
|
842 | }
|
843 |
|
844 | stats (path, opts, cb) {
|
845 | if (typeof opts === 'function') return this.stats(path, null, opts)
|
846 | const self = this
|
847 | const stats = new Map()
|
848 |
|
849 | this.stat(path, (err, stat, trie) => {
|
850 | if (err) return cb(err)
|
851 | if (stat.isFile()) {
|
852 | return fileStats(path, cb)
|
853 | } else {
|
854 | const recursive = opts && (opts.recursive !== false)
|
855 | const ite = statIterator(self, path, { recursive })
|
856 | return ite.next(function loop (err, info) {
|
857 | if (err) return cb(err)
|
858 | if (!info) return cb(null, stats)
|
859 | fileStats(info.path, (err, fileStats) => {
|
860 | if (err && err.errno !== 2) return cb(err)
|
861 | if (!fileStats) return ite.next(loop)
|
862 | stats.set(info.path, fileStats)
|
863 | return ite.next(loop)
|
864 | })
|
865 | })
|
866 | }
|
867 | })
|
868 |
|
869 | function onstats (err, path, fileStats) {
|
870 | if (err) return cb(err)
|
871 | stats.set(path, fileStats)
|
872 | }
|
873 |
|
874 | function fileStats (path, cb) {
|
875 | const total = emptyStats()
|
876 | return self.stat(path, (err, stat, trie) => {
|
877 | if (err) return cb(err)
|
878 | return self._getContent(trie.feed, (err, contentState) => {
|
879 | if (err) return cb(err)
|
880 | const downloadedBlocks = contentState.feed.downloaded(stat.offset, stat.offset + stat.blocks)
|
881 | total.blocks = stat.blocks
|
882 | total.size = stat.size
|
883 | total.downloadedBlocks = downloadedBlocks
|
884 |
|
885 |
|
886 | return cb(null, total)
|
887 | })
|
888 | })
|
889 | }
|
890 |
|
891 | function emptyStats () {
|
892 | return {
|
893 | blocks: 0,
|
894 | size: 0,
|
895 | downloadedBlocks: 0,
|
896 | }
|
897 | }
|
898 | }
|
899 |
|
900 | watchStats (path, opts) {
|
901 | const self = this
|
902 | var timer = setInterval(collectStats, (opts && opts.statsInveral) || 2000)
|
903 | var collecting = false
|
904 | var destroyed = false
|
905 |
|
906 | const handle = new EventEmitter()
|
907 | Object.assign(handle, {
|
908 | destroy
|
909 | })
|
910 | return handle
|
911 |
|
912 | function collectStats () {
|
913 | if (collecting) return
|
914 | collecting = true
|
915 | self.stats(path, opts, (err, stats) => {
|
916 | if (err) return destroy(err)
|
917 | collecting = false
|
918 | handle.stats = stats
|
919 | handle.emit('update')
|
920 | })
|
921 | }
|
922 |
|
923 | function destroy (err) {
|
924 | handle.emit('destroy', err)
|
925 | clearInterval(timer)
|
926 | destroyed = true
|
927 | }
|
928 | }
|
929 |
|
930 | mirror () {
|
931 | const self = this
|
932 | if (this._unmirror) return this._unmirror
|
933 | const mirrorRanges = new Map()
|
934 |
|
935 | this.on('content-feed', oncore)
|
936 | this.on('metadata-feed', oncore)
|
937 | this.getAllMounts({ content: true }, (err, mounts) => {
|
938 | if (err) return this.emit('error', err)
|
939 | for (const { metadata, content } of mounts.values()) {
|
940 | oncore(metadata)
|
941 | oncore(content)
|
942 | }
|
943 | })
|
944 |
|
945 | this._unmirror = unmirror
|
946 | return this._unmirror
|
947 |
|
948 | function unmirror () {
|
949 | if (!self._unmirror) return
|
950 | self._unmirror = null
|
951 | self.removeListener('content-feed', oncore)
|
952 | self.removeListener('metadata-feed', oncore)
|
953 | for (const [ core, range ] of mirrorRanges) {
|
954 | core.undownload(range)
|
955 | }
|
956 | }
|
957 |
|
958 | function oncore (core) {
|
959 | if (!core) return
|
960 | if (!self._unmirror || self._unmirror !== unmirror || mirrorRanges.has(core)) return
|
961 | mirrorRanges.set(core, core.download({ start: 0, end: -1 }))
|
962 | }
|
963 | }
|
964 |
|
965 | download (path, opts, cb) {
|
966 | if (typeof opts === 'function') {
|
967 | cb = opts
|
968 | opts = null
|
969 | }
|
970 | opts = opts || {}
|
971 | const self = this
|
972 | const ranges = new Map()
|
973 | var pending = 0
|
974 | var destroyed = false
|
975 |
|
976 | const handle = new EventEmitter()
|
977 | Object.assign(handle, {
|
978 | destroy
|
979 | })
|
980 |
|
981 | self.stat(path, (err, stat, trie) => {
|
982 | if (err) return destroy(err)
|
983 | if (stat.isFile()) {
|
984 | downloadFile(path, stat, trie, destroy)
|
985 | } else {
|
986 | const recursive = opts.recursive !== false
|
987 | const noMounts = opts.noMounts !== false
|
988 | const ite = statIterator(self, path, { recursive, noMounts, random: true })
|
989 | downloadNext(ite)
|
990 | }
|
991 | })
|
992 |
|
993 | return handle
|
994 |
|
995 | function downloadNext (ite) {
|
996 | if (destroyed) return
|
997 | ite.next((err, info) => {
|
998 | if (err) return destroy(err)
|
999 | if (!info) {
|
1000 | if (!ranges.size) return destroy(null)
|
1001 | else return
|
1002 | }
|
1003 | const { path, stat, trie } = info
|
1004 | if (!stat.blocks || stat.mount || stat.isDirectory()) return downloadNext(ite)
|
1005 | downloadFile(path, stat, trie, err => {
|
1006 | if (err) return destroy(err)
|
1007 | return downloadNext(ite)
|
1008 | })
|
1009 | if (pending < ((opts && opts.maxConcurrent) || 50)) {
|
1010 | return downloadNext(ite)
|
1011 | }
|
1012 | })
|
1013 | }
|
1014 |
|
1015 | function downloadFile (path, stat, trie, cb) {
|
1016 | pending++
|
1017 | self._getContent(trie.feed, (err, contentState) => {
|
1018 | if (err) return destroy(err)
|
1019 | const feed = contentState.feed
|
1020 | const range = feed.download({
|
1021 | start: stat.offset,
|
1022 | end: stat.offset + stat.blocks
|
1023 | }, err => {
|
1024 | pending--
|
1025 | if (err) return cb(err)
|
1026 | ranges.delete(path)
|
1027 | return cb(null)
|
1028 | })
|
1029 | ranges.set(path, { range, feed })
|
1030 | })
|
1031 | }
|
1032 |
|
1033 | function destroy (err) {
|
1034 | if (destroyed) return null
|
1035 | destroyed = true
|
1036 | for (const [path, { feed, range }] of ranges) {
|
1037 | feed.undownload(range)
|
1038 | }
|
1039 | if (err) {
|
1040 | handle.emit('error', err)
|
1041 | if (cb) return cb(err)
|
1042 | } else {
|
1043 | handle.emit('finish')
|
1044 | if (cb) return cb(null)
|
1045 | }
|
1046 | }
|
1047 | }
|
1048 |
|
1049 | watch (name, onchange) {
|
1050 | name = fixName(name)
|
1051 | return this.db.watch(name, onchange)
|
1052 | }
|
1053 |
|
1054 | mount (path, key, opts, cb) {
|
1055 | if (typeof opts === 'function') return this.mount(path, key, null, opts)
|
1056 | const self = this
|
1057 |
|
1058 | path = fixName(path)
|
1059 | opts = opts || {}
|
1060 |
|
1061 | const statOpts = {
|
1062 | uid: opts.uid,
|
1063 | gid: opts.gid
|
1064 | }
|
1065 | statOpts.mount = {
|
1066 | key,
|
1067 | version: opts.version,
|
1068 | hash: opts.hash,
|
1069 | hypercore: !!opts.hypercore
|
1070 | }
|
1071 | statOpts.directory = !opts.hypercore
|
1072 |
|
1073 | if (opts.hypercore) {
|
1074 | const core = this.corestore.get({
|
1075 | key,
|
1076 | ...opts,
|
1077 | parents: [this.key],
|
1078 | sparse: this.sparse
|
1079 | })
|
1080 | core.ready(err => {
|
1081 | if (err) return cb(err)
|
1082 | this.emit('content-feed', core)
|
1083 | statOpts.size = core.byteLength
|
1084 | statOpts.blocks = core.length
|
1085 | return mountCore()
|
1086 | })
|
1087 | } else {
|
1088 | return process.nextTick(mountTrie, null)
|
1089 | }
|
1090 |
|
1091 | function mountCore () {
|
1092 | self._createStat(path, statOpts, (err, st) => {
|
1093 | if (err) return cb(err)
|
1094 | return self.db.put(path, st.encode(), cb)
|
1095 | })
|
1096 | }
|
1097 |
|
1098 | function mountTrie () {
|
1099 | self._createStat(path, statOpts, (err, st) => {
|
1100 | if (err) return cb(err)
|
1101 | self.db.mount(path, key, { ...opts, value: st.encode() }, err => {
|
1102 | return self.db.loadMount(path, cb)
|
1103 | })
|
1104 | })
|
1105 | }
|
1106 | }
|
1107 |
|
1108 | unmount (path, cb) {
|
1109 | this.stat(path, (err, st) => {
|
1110 | if (err) return cb(err)
|
1111 | if (!st.mount) return cb(new Error('Can only unmount mounts.'))
|
1112 | if (st.mount.hypercore) {
|
1113 | return this.unlink(path, cb)
|
1114 | } else {
|
1115 | return this.db.unmount(path, cb)
|
1116 | }
|
1117 | })
|
1118 | }
|
1119 |
|
1120 | symlink (target, linkName, cb) {
|
1121 | target = unixify(target)
|
1122 | linkName = fixName(linkName)
|
1123 |
|
1124 | this.lstat(linkName, (err, stat) => {
|
1125 | if (err && (err.errno !== 2)) return cb(err)
|
1126 | if (!err) return cb(new errors.PathAlreadyExists(linkName))
|
1127 | const st = Stat.symlink({
|
1128 | linkname: target
|
1129 | })
|
1130 | return this._putStat(linkName, st, cb)
|
1131 | })
|
1132 | }
|
1133 |
|
1134 | createMountStream (opts) {
|
1135 | return createMountStream(this, opts)
|
1136 | }
|
1137 |
|
1138 | getAllMounts (opts, cb) {
|
1139 | if (typeof opts === 'function') return this.getAllMounts(null, opts)
|
1140 | const mounts = new Map()
|
1141 |
|
1142 | this.ready(err => {
|
1143 | if (err) return cb(err)
|
1144 | collect(this.createMountStream(opts), (err, mountList) => {
|
1145 | if (err) return cb(err)
|
1146 | for (const { path, metadata, content } of mountList) {
|
1147 | mounts.set(path, { metadata, content })
|
1148 | }
|
1149 | return cb(null, mounts)
|
1150 | })
|
1151 | })
|
1152 | }
|
1153 |
|
1154 | extension (name, message) {
|
1155 | this.metadata.extension(name, message)
|
1156 | }
|
1157 |
|
1158 | get peers () {
|
1159 | return this.metadata.peers
|
1160 | }
|
1161 |
|
1162 | setMetadata (path, key, value, cb) {
|
1163 | const metadata = {}
|
1164 | metadata[key] = value
|
1165 | this._update(path, { metadata }, cb)
|
1166 | }
|
1167 |
|
1168 | removeMetadata (path, key, cb) {
|
1169 | const metadata = {}
|
1170 | metadata[key] = null
|
1171 | this._update(path, { metadata }, cb)
|
1172 | }
|
1173 |
|
1174 | copy (from, to, cb) {
|
1175 | this.stat(from, (err, stat) => {
|
1176 | if (err) return cb(err)
|
1177 | this.create(to, stat, cb)
|
1178 | })
|
1179 | }
|
1180 |
|
1181 |
|
1182 |
|
1183 | createTag (name, version, cb) {
|
1184 | return this.tags.create(name, version, cb)
|
1185 | }
|
1186 |
|
1187 | getAllTags (cb) {
|
1188 | return this.tags.getAll(cb)
|
1189 | }
|
1190 |
|
1191 | deleteTag (name, cb) {
|
1192 | return this.tags.delete(name, cb)
|
1193 | }
|
1194 |
|
1195 | getTaggedVersion (name, cb) {
|
1196 | return this.tags.get(name, cb)
|
1197 | }
|
1198 | }
|
1199 |
|
1200 | function isObject (val) {
|
1201 | return !!val && typeof val !== 'string' && !Buffer.isBuffer(val)
|
1202 | }
|
1203 |
|
1204 | function ifNotExists (oldNode, newNode, cb) {
|
1205 | if (oldNode) return cb(new errors.PathAlreadyExists(oldNode.key))
|
1206 | return cb(null, true)
|
1207 | }
|
1208 |
|
1209 | function fixName (name) {
|
1210 | name = unixify(name)
|
1211 | if (!name.startsWith('/')) name = '/' + name
|
1212 | return name
|
1213 | }
|
1214 |
|
1215 | function noop () {}
|