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Filename : minizlib.zip
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PK�����
j\�U0�!���!����index.jsnu��[�����������'use strict'

const assert = require('assert')
const Buffer = require('buffer').Buffer
const realZlib = require('zlib')

const constants = exports.constants = require('./constants.js')
const Minipass = require('minipass')

const OriginalBufferConcat = Buffer.concat

class ZlibError extends Error {
  constructor (err) {
    super('zlib: ' + err.message)
    this.code = err.code
    this.errno = err.errno
    /* istanbul ignore if */
    if (!this.code)
      this.code = 'ZLIB_ERROR'

    this.message = 'zlib: ' + err.message
    Error.captureStackTrace(this, this.constructor)
  }

  get name () {
    return 'ZlibError'
  }
}

// the Zlib class they all inherit from
// This thing manages the queue of requests, and returns
// true or false if there is anything in the queue when
// you call the .write() method.
const _opts = Symbol('opts')
const _flushFlag = Symbol('flushFlag')
const _finishFlushFlag = Symbol('finishFlushFlag')
const _fullFlushFlag = Symbol('fullFlushFlag')
const _handle = Symbol('handle')
const _onError = Symbol('onError')
const _sawError = Symbol('sawError')
const _level = Symbol('level')
const _strategy = Symbol('strategy')
const _ended = Symbol('ended')
const _defaultFullFlush = Symbol('_defaultFullFlush')

class ZlibBase extends Minipass {
  constructor (opts, mode) {
    if (!opts || typeof opts !== 'object')
      throw new TypeError('invalid options for ZlibBase constructor')

    super(opts)
    this[_ended] = false
    this[_opts] = opts

    this[_flushFlag] = opts.flush
    this[_finishFlushFlag] = opts.finishFlush
    // this will throw if any options are invalid for the class selected
    try {
      this[_handle] = new realZlib[mode](opts)
    } catch (er) {
      // make sure that all errors get decorated properly
      throw new ZlibError(er)
    }

    this[_onError] = (err) => {
      this[_sawError] = true
      // there is no way to cleanly recover.
      // continuing only obscures problems.
      this.close()
      this.emit('error', err)
    }

    this[_handle].on('error', er => this[_onError](new ZlibError(er)))
    this.once('end', () => this.close)
  }

  close () {
    if (this[_handle]) {
      this[_handle].close()
      this[_handle] = null
      this.emit('close')
    }
  }

  reset () {
    if (!this[_sawError]) {
      assert(this[_handle], 'zlib binding closed')
      return this[_handle].reset()
    }
  }

  flush (flushFlag) {
    if (this.ended)
      return

    if (typeof flushFlag !== 'number')
      flushFlag = this[_fullFlushFlag]
    this.write(Object.assign(Buffer.alloc(0), { [_flushFlag]: flushFlag }))
  }

  end (chunk, encoding, cb) {
    if (chunk)
      this.write(chunk, encoding)
    this.flush(this[_finishFlushFlag])
    this[_ended] = true
    return super.end(null, null, cb)
  }

  get ended () {
    return this[_ended]
  }

  write (chunk, encoding, cb) {
    // process the chunk using the sync process
    // then super.write() all the outputted chunks
    if (typeof encoding === 'function')
      cb = encoding, encoding = 'utf8'

    if (typeof chunk === 'string')
      chunk = Buffer.from(chunk, encoding)

    if (this[_sawError])
      return
    assert(this[_handle], 'zlib binding closed')

    // _processChunk tries to .close() the native handle after it's done, so we
    // intercept that by temporarily making it a no-op.
    const nativeHandle = this[_handle]._handle
    const originalNativeClose = nativeHandle.close
    nativeHandle.close = () => {}
    const originalClose = this[_handle].close
    this[_handle].close = () => {}
    // It also calls `Buffer.concat()` at the end, which may be convenient
    // for some, but which we are not interested in as it slows us down.
    Buffer.concat = (args) => args
    let result
    try {
      const flushFlag = typeof chunk[_flushFlag] === 'number'
        ? chunk[_flushFlag] : this[_flushFlag]
      result = this[_handle]._processChunk(chunk, flushFlag)
      // if we don't throw, reset it back how it was
      Buffer.concat = OriginalBufferConcat
    } catch (err) {
      // or if we do, put Buffer.concat() back before we emit error
      // Error events call into user code, which may call Buffer.concat()
      Buffer.concat = OriginalBufferConcat
      this[_onError](new ZlibError(err))
    } finally {
      if (this[_handle]) {
        // Core zlib resets `_handle` to null after attempting to close the
        // native handle. Our no-op handler prevented actual closure, but we
        // need to restore the `._handle` property.
        this[_handle]._handle = nativeHandle
        nativeHandle.close = originalNativeClose
        this[_handle].close = originalClose
        // `_processChunk()` adds an 'error' listener. If we don't remove it
        // after each call, these handlers start piling up.
        this[_handle].removeAllListeners('error')
      }
    }

    let writeReturn
    if (result) {
      if (Array.isArray(result) && result.length > 0) {
        // The first buffer is always `handle._outBuffer`, which would be
        // re-used for later invocations; so, we always have to copy that one.
        writeReturn = super.write(Buffer.from(result[0]))
        for (let i = 1; i < result.length; i++) {
          writeReturn = super.write(result[i])
        }
      } else {
        writeReturn = super.write(Buffer.from(result))
      }
    }

    if (cb)
      cb()
    return writeReturn
  }
}

class Zlib extends ZlibBase {
  constructor (opts, mode) {
    opts = opts || {}

    opts.flush = opts.flush || constants.Z_NO_FLUSH
    opts.finishFlush = opts.finishFlush || constants.Z_FINISH
    super(opts, mode)

    this[_fullFlushFlag] = constants.Z_FULL_FLUSH
    this[_level] = opts.level
    this[_strategy] = opts.strategy
  }

  params (level, strategy) {
    if (this[_sawError])
      return

    if (!this[_handle])
      throw new Error('cannot switch params when binding is closed')

    // no way to test this without also not supporting params at all
    /* istanbul ignore if */
    if (!this[_handle].params)
      throw new Error('not supported in this implementation')

    if (this[_level] !== level || this[_strategy] !== strategy) {
      this.flush(constants.Z_SYNC_FLUSH)
      assert(this[_handle], 'zlib binding closed')
      // .params() calls .flush(), but the latter is always async in the
      // core zlib. We override .flush() temporarily to intercept that and
      // flush synchronously.
      const origFlush = this[_handle].flush
      this[_handle].flush = (flushFlag, cb) => {
        this.flush(flushFlag)
        cb()
      }
      try {
        this[_handle].params(level, strategy)
      } finally {
        this[_handle].flush = origFlush
      }
      /* istanbul ignore else */
      if (this[_handle]) {
        this[_level] = level
        this[_strategy] = strategy
      }
    }
  }
}

// minimal 2-byte header
class Deflate extends Zlib {
  constructor (opts) {
    super(opts, 'Deflate')
  }
}

class Inflate extends Zlib {
  constructor (opts) {
    super(opts, 'Inflate')
  }
}

// gzip - bigger header, same deflate compression
class Gzip extends Zlib {
  constructor (opts) {
    super(opts, 'Gzip')
  }
}

class Gunzip extends Zlib {
  constructor (opts) {
    super(opts, 'Gunzip')
  }
}

// raw - no header
class DeflateRaw extends Zlib {
  constructor (opts) {
    super(opts, 'DeflateRaw')
  }
}

class InflateRaw extends Zlib {
  constructor (opts) {
    super(opts, 'InflateRaw')
  }
}

// auto-detect header.
class Unzip extends Zlib {
  constructor (opts) {
    super(opts, 'Unzip')
  }
}

class Brotli extends ZlibBase {
  constructor (opts, mode) {
    opts = opts || {}

    opts.flush = opts.flush || constants.BROTLI_OPERATION_PROCESS
    opts.finishFlush = opts.finishFlush || constants.BROTLI_OPERATION_FINISH

    super(opts, mode)

    this[_fullFlushFlag] = constants.BROTLI_OPERATION_FLUSH
  }
}

class BrotliCompress extends Brotli {
  constructor (opts) {
    super(opts, 'BrotliCompress')
  }
}

class BrotliDecompress extends Brotli {
  constructor (opts) {
    super(opts, 'BrotliDecompress')
  }
}

exports.Deflate = Deflate
exports.Inflate = Inflate
exports.Gzip = Gzip
exports.Gunzip = Gunzip
exports.DeflateRaw = DeflateRaw
exports.InflateRaw = InflateRaw
exports.Unzip = Unzip
/* istanbul ignore else */
if (typeof realZlib.BrotliCompress === 'function') {
  exports.BrotliCompress = BrotliCompress
  exports.BrotliDecompress = BrotliDecompress
} else {
  exports.BrotliCompress = exports.BrotliDecompress = class {
    constructor () {
      throw new Error('Brotli is not supported in this version of Node.js')
    }
  }
}
PK�����
j\,Y2W������	��README.mdnu��[�����������# minizlib

A fast zlib stream built on [minipass](http://npm.im/minipass) and
Node.js's zlib binding.

This module was created to serve the needs of
[node-tar](http://npm.im/tar) and
[minipass-fetch](http://npm.im/minipass-fetch).

Brotli is supported in versions of node with a Brotli binding.

## How does this differ from the streams in `require('zlib')`?

First, there are no convenience methods to compress or decompress a
buffer.  If you want those, use the built-in `zlib` module.  This is
only streams.  That being said, Minipass streams to make it fairly easy to
use as one-liners: `new zlib.Deflate().end(data).read()` will return the
deflate compressed result.

This module compresses and decompresses the data as fast as you feed
it in.  It is synchronous, and runs on the main process thread.  Zlib
and Brotli operations can be high CPU, but they're very fast, and doing it
this way means much less bookkeeping and artificial deferral.

Node's built in zlib streams are built on top of `stream.Transform`.
They do the maximally safe thing with respect to consistent
asynchrony, buffering, and backpressure.

See [Minipass](http://npm.im/minipass) for more on the differences between
Node.js core streams and Minipass streams, and the convenience methods
provided by that class.

## Classes

- Deflate
- Inflate
- Gzip
- Gunzip
- DeflateRaw
- InflateRaw
- Unzip
- BrotliCompress (Node v10 and higher)
- BrotliDecompress (Node v10 and higher)

## USAGE

```js
const zlib = require('minizlib')
const input = sourceOfCompressedData()
const decode = new zlib.BrotliDecompress()
const output = whereToWriteTheDecodedData()
input.pipe(decode).pipe(output)
```
PK�����
j\��=�������LICENSEnu��[�����������Minizlib was created by Isaac Z. Schlueter.
It is a derivative work of the Node.js project.

"""
Copyright Isaac Z. Schlueter and Contributors
Copyright Node.js contributors. All rights reserved.
Copyright Joyent, Inc. and other Node contributors. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""
PK�����
j\������������constants.jsnu��[�����������// Update with any zlib constants that are added or changed in the future.
// Node v6 didn't export this, so we just hard code the version and rely
// on all the other hard-coded values from zlib v4736.  When node v6
// support drops, we can just export the realZlibConstants object.
const realZlibConstants = require('zlib').constants ||
  /* istanbul ignore next */ { ZLIB_VERNUM: 4736 }

module.exports = Object.freeze(Object.assign(Object.create(null), {
  Z_NO_FLUSH: 0,
  Z_PARTIAL_FLUSH: 1,
  Z_SYNC_FLUSH: 2,
  Z_FULL_FLUSH: 3,
  Z_FINISH: 4,
  Z_BLOCK: 5,
  Z_OK: 0,
  Z_STREAM_END: 1,
  Z_NEED_DICT: 2,
  Z_ERRNO: -1,
  Z_STREAM_ERROR: -2,
  Z_DATA_ERROR: -3,
  Z_MEM_ERROR: -4,
  Z_BUF_ERROR: -5,
  Z_VERSION_ERROR: -6,
  Z_NO_COMPRESSION: 0,
  Z_BEST_SPEED: 1,
  Z_BEST_COMPRESSION: 9,
  Z_DEFAULT_COMPRESSION: -1,
  Z_FILTERED: 1,
  Z_HUFFMAN_ONLY: 2,
  Z_RLE: 3,
  Z_FIXED: 4,
  Z_DEFAULT_STRATEGY: 0,
  DEFLATE: 1,
  INFLATE: 2,
  GZIP: 3,
  GUNZIP: 4,
  DEFLATERAW: 5,
  INFLATERAW: 6,
  UNZIP: 7,
  BROTLI_DECODE: 8,
  BROTLI_ENCODE: 9,
  Z_MIN_WINDOWBITS: 8,
  Z_MAX_WINDOWBITS: 15,
  Z_DEFAULT_WINDOWBITS: 15,
  Z_MIN_CHUNK: 64,
  Z_MAX_CHUNK: Infinity,
  Z_DEFAULT_CHUNK: 16384,
  Z_MIN_MEMLEVEL: 1,
  Z_MAX_MEMLEVEL: 9,
  Z_DEFAULT_MEMLEVEL: 8,
  Z_MIN_LEVEL: -1,
  Z_MAX_LEVEL: 9,
  Z_DEFAULT_LEVEL: -1,
  BROTLI_OPERATION_PROCESS: 0,
  BROTLI_OPERATION_FLUSH: 1,
  BROTLI_OPERATION_FINISH: 2,
  BROTLI_OPERATION_EMIT_METADATA: 3,
  BROTLI_MODE_GENERIC: 0,
  BROTLI_MODE_TEXT: 1,
  BROTLI_MODE_FONT: 2,
  BROTLI_DEFAULT_MODE: 0,
  BROTLI_MIN_QUALITY: 0,
  BROTLI_MAX_QUALITY: 11,
  BROTLI_DEFAULT_QUALITY: 11,
  BROTLI_MIN_WINDOW_BITS: 10,
  BROTLI_MAX_WINDOW_BITS: 24,
  BROTLI_LARGE_MAX_WINDOW_BITS: 30,
  BROTLI_DEFAULT_WINDOW: 22,
  BROTLI_MIN_INPUT_BLOCK_BITS: 16,
  BROTLI_MAX_INPUT_BLOCK_BITS: 24,
  BROTLI_PARAM_MODE: 0,
  BROTLI_PARAM_QUALITY: 1,
  BROTLI_PARAM_LGWIN: 2,
  BROTLI_PARAM_LGBLOCK: 3,
  BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING: 4,
  BROTLI_PARAM_SIZE_HINT: 5,
  BROTLI_PARAM_LARGE_WINDOW: 6,
  BROTLI_PARAM_NPOSTFIX: 7,
  BROTLI_PARAM_NDIRECT: 8,
  BROTLI_DECODER_RESULT_ERROR: 0,
  BROTLI_DECODER_RESULT_SUCCESS: 1,
  BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: 2,
  BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: 3,
  BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: 0,
  BROTLI_DECODER_PARAM_LARGE_WINDOW: 1,
  BROTLI_DECODER_NO_ERROR: 0,
  BROTLI_DECODER_SUCCESS: 1,
  BROTLI_DECODER_NEEDS_MORE_INPUT: 2,
  BROTLI_DECODER_NEEDS_MORE_OUTPUT: 3,
  BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE: -1,
  BROTLI_DECODER_ERROR_FORMAT_RESERVED: -2,
  BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE: -3,
  BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET: -4,
  BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME: -5,
  BROTLI_DECODER_ERROR_FORMAT_CL_SPACE: -6,
  BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE: -7,
  BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT: -8,
  BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1: -9,
  BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2: -10,
  BROTLI_DECODER_ERROR_FORMAT_TRANSFORM: -11,
  BROTLI_DECODER_ERROR_FORMAT_DICTIONARY: -12,
  BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS: -13,
  BROTLI_DECODER_ERROR_FORMAT_PADDING_1: -14,
  BROTLI_DECODER_ERROR_FORMAT_PADDING_2: -15,
  BROTLI_DECODER_ERROR_FORMAT_DISTANCE: -16,
  BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET: -19,
  BROTLI_DECODER_ERROR_INVALID_ARGUMENTS: -20,
  BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES: -21,
  BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS: -22,
  BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP: -25,
  BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1: -26,
  BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2: -27,
  BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES: -30,
  BROTLI_DECODER_ERROR_UNREACHABLE: -31,
}, realZlibConstants))
PK�����
j\�'�o�6���6����node_modules/minipass/index.jsnu��[�����������'use strict'
const EE = require('events')
const Yallist = require('yallist')
const SD = require('string_decoder').StringDecoder

const EOF = Symbol('EOF')
const MAYBE_EMIT_END = Symbol('maybeEmitEnd')
const EMITTED_END = Symbol('emittedEnd')
const EMITTING_END = Symbol('emittingEnd')
const CLOSED = Symbol('closed')
const READ = Symbol('read')
const FLUSH = Symbol('flush')
const FLUSHCHUNK = Symbol('flushChunk')
const ENCODING = Symbol('encoding')
const DECODER = Symbol('decoder')
const FLOWING = Symbol('flowing')
const PAUSED = Symbol('paused')
const RESUME = Symbol('resume')
const BUFFERLENGTH = Symbol('bufferLength')
const BUFFERPUSH = Symbol('bufferPush')
const BUFFERSHIFT = Symbol('bufferShift')
const OBJECTMODE = Symbol('objectMode')
const DESTROYED = Symbol('destroyed')

// TODO remove when Node v8 support drops
const doIter = global._MP_NO_ITERATOR_SYMBOLS_  !== '1'
const ASYNCITERATOR = doIter && Symbol.asyncIterator
  || Symbol('asyncIterator not implemented')
const ITERATOR = doIter && Symbol.iterator
  || Symbol('iterator not implemented')

// Buffer in node 4.x < 4.5.0 doesn't have working Buffer.from
// or Buffer.alloc, and Buffer in node 10 deprecated the ctor.
// .M, this is fine .\^/M..
const B = Buffer.alloc ? Buffer
  : /* istanbul ignore next */ require('safe-buffer').Buffer

// events that mean 'the stream is over'
// these are treated specially, and re-emitted
// if they are listened for after emitting.
const isEndish = ev =>
  ev === 'end' ||
  ev === 'finish' ||
  ev === 'prefinish'

const isArrayBuffer = b => b instanceof ArrayBuffer ||
  typeof b === 'object' &&
  b.constructor &&
  b.constructor.name === 'ArrayBuffer' &&
  b.byteLength >= 0

const isArrayBufferView = b => !B.isBuffer(b) && ArrayBuffer.isView(b)

module.exports = class Minipass extends EE {
  constructor (options) {
    super()
    this[FLOWING] = false
    // whether we're explicitly paused
    this[PAUSED] = false
    this.pipes = new Yallist()
    this.buffer = new Yallist()
    this[OBJECTMODE] = options && options.objectMode || false
    if (this[OBJECTMODE])
      this[ENCODING] = null
    else
      this[ENCODING] = options && options.encoding || null
    if (this[ENCODING] === 'buffer')
      this[ENCODING] = null
    this[DECODER] = this[ENCODING] ? new SD(this[ENCODING]) : null
    this[EOF] = false
    this[EMITTED_END] = false
    this[EMITTING_END] = false
    this[CLOSED] = false
    this.writable = true
    this.readable = true
    this[BUFFERLENGTH] = 0
    this[DESTROYED] = false
  }

  get bufferLength () { return this[BUFFERLENGTH] }

  get encoding () { return this[ENCODING] }
  set encoding (enc) {
    if (this[OBJECTMODE])
      throw new Error('cannot set encoding in objectMode')

    if (this[ENCODING] && enc !== this[ENCODING] &&
        (this[DECODER] && this[DECODER].lastNeed || this[BUFFERLENGTH]))
      throw new Error('cannot change encoding')

    if (this[ENCODING] !== enc) {
      this[DECODER] = enc ? new SD(enc) : null
      if (this.buffer.length)
        this.buffer = this.buffer.map(chunk => this[DECODER].write(chunk))
    }

    this[ENCODING] = enc
  }

  setEncoding (enc) {
    this.encoding = enc
  }

  get objectMode () { return this[OBJECTMODE] }
  set objectMode (ॐ ) { this[OBJECTMODE] = this[OBJECTMODE] || !!ॐ  }

  write (chunk, encoding, cb) {
    if (this[EOF])
      throw new Error('write after end')

    if (this[DESTROYED]) {
      this.emit('error', Object.assign(
        new Error('Cannot call write after a stream was destroyed'),
        { code: 'ERR_STREAM_DESTROYED' }
      ))
      return true
    }

    if (typeof encoding === 'function')
      cb = encoding, encoding = 'utf8'

    if (!encoding)
      encoding = 'utf8'

    // convert array buffers and typed array views into buffers
    // at some point in the future, we may want to do the opposite!
    // leave strings and buffers as-is
    // anything else switches us into object mode
    if (!this[OBJECTMODE] && !B.isBuffer(chunk)) {
      if (isArrayBufferView(chunk))
        chunk = B.from(chunk.buffer, chunk.byteOffset, chunk.byteLength)
      else if (isArrayBuffer(chunk))
        chunk = B.from(chunk)
      else if (typeof chunk !== 'string')
        // use the setter so we throw if we have encoding set
        this.objectMode = true
    }

    // this ensures at this point that the chunk is a buffer or string
    // don't buffer it up or send it to the decoder
    if (!this.objectMode && !chunk.length) {
      const ret = this.flowing
      if (this[BUFFERLENGTH] !== 0)
        this.emit('readable')
      if (cb)
        cb()
      return ret
    }

    // fast-path writing strings of same encoding to a stream with
    // an empty buffer, skipping the buffer/decoder dance
    if (typeof chunk === 'string' && !this[OBJECTMODE] &&
        // unless it is a string already ready for us to use
        !(encoding === this[ENCODING] && !this[DECODER].lastNeed)) {
      chunk = B.from(chunk, encoding)
    }

    if (B.isBuffer(chunk) && this[ENCODING])
      chunk = this[DECODER].write(chunk)

    try {
      return this.flowing
        ? (this.emit('data', chunk), this.flowing)
        : (this[BUFFERPUSH](chunk), false)
    } finally {
      if (this[BUFFERLENGTH] !== 0)
        this.emit('readable')
      if (cb)
        cb()
    }
  }

  read (n) {
    if (this[DESTROYED])
      return null

    try {
      if (this[BUFFERLENGTH] === 0 || n === 0 || n > this[BUFFERLENGTH])
        return null

      if (this[OBJECTMODE])
        n = null

      if (this.buffer.length > 1 && !this[OBJECTMODE]) {
        if (this.encoding)
          this.buffer = new Yallist([
            Array.from(this.buffer).join('')
          ])
        else
          this.buffer = new Yallist([
            B.concat(Array.from(this.buffer), this[BUFFERLENGTH])
          ])
      }

      return this[READ](n || null, this.buffer.head.value)
    } finally {
      this[MAYBE_EMIT_END]()
    }
  }

  [READ] (n, chunk) {
    if (n === chunk.length || n === null)
      this[BUFFERSHIFT]()
    else {
      this.buffer.head.value = chunk.slice(n)
      chunk = chunk.slice(0, n)
      this[BUFFERLENGTH] -= n
    }

    this.emit('data', chunk)

    if (!this.buffer.length && !this[EOF])
      this.emit('drain')

    return chunk
  }

  end (chunk, encoding, cb) {
    if (typeof chunk === 'function')
      cb = chunk, chunk = null
    if (typeof encoding === 'function')
      cb = encoding, encoding = 'utf8'
    if (chunk)
      this.write(chunk, encoding)
    if (cb)
      this.once('end', cb)
    this[EOF] = true
    this.writable = false

    // if we haven't written anything, then go ahead and emit,
    // even if we're not reading.
    // we'll re-emit if a new 'end' listener is added anyway.
    // This makes MP more suitable to write-only use cases.
    if (this.flowing || !this[PAUSED])
      this[MAYBE_EMIT_END]()
    return this
  }

  // don't let the internal resume be overwritten
  [RESUME] () {
    if (this[DESTROYED])
      return

    this[PAUSED] = false
    this[FLOWING] = true
    this.emit('resume')
    if (this.buffer.length)
      this[FLUSH]()
    else if (this[EOF])
      this[MAYBE_EMIT_END]()
    else
      this.emit('drain')
  }

  resume () {
    return this[RESUME]()
  }

  pause () {
    this[FLOWING] = false
    this[PAUSED] = true
  }

  get destroyed () {
    return this[DESTROYED]
  }

  get flowing () {
    return this[FLOWING]
  }

  get paused () {
    return this[PAUSED]
  }

  [BUFFERPUSH] (chunk) {
    if (this[OBJECTMODE])
      this[BUFFERLENGTH] += 1
    else
      this[BUFFERLENGTH] += chunk.length
    return this.buffer.push(chunk)
  }

  [BUFFERSHIFT] () {
    if (this.buffer.length) {
      if (this[OBJECTMODE])
        this[BUFFERLENGTH] -= 1
      else
        this[BUFFERLENGTH] -= this.buffer.head.value.length
    }
    return this.buffer.shift()
  }

  [FLUSH] () {
    do {} while (this[FLUSHCHUNK](this[BUFFERSHIFT]()))

    if (!this.buffer.length && !this[EOF])
      this.emit('drain')
  }

  [FLUSHCHUNK] (chunk) {
    return chunk ? (this.emit('data', chunk), this.flowing) : false
  }

  pipe (dest, opts) {
    if (this[DESTROYED])
      return

    const ended = this[EMITTED_END]
    opts = opts || {}
    if (dest === process.stdout || dest === process.stderr)
      opts.end = false
    else
      opts.end = opts.end !== false

    const p = { dest: dest, opts: opts, ondrain: _ => this[RESUME]() }
    this.pipes.push(p)

    dest.on('drain', p.ondrain)
    this[RESUME]()
    // piping an ended stream ends immediately
    if (ended && p.opts.end)
      p.dest.end()
    return dest
  }

  addListener (ev, fn) {
    return this.on(ev, fn)
  }

  on (ev, fn) {
    try {
      return super.on(ev, fn)
    } finally {
      if (ev === 'data' && !this.pipes.length && !this.flowing)
        this[RESUME]()
      else if (isEndish(ev) && this[EMITTED_END]) {
        super.emit(ev)
        this.removeAllListeners(ev)
      }
    }
  }

  get emittedEnd () {
    return this[EMITTED_END]
  }

  [MAYBE_EMIT_END] () {
    if (!this[EMITTING_END] &&
        !this[EMITTED_END] &&
        !this[DESTROYED] &&
        this.buffer.length === 0 &&
        this[EOF]) {
      this[EMITTING_END] = true
      this.emit('end')
      this.emit('prefinish')
      this.emit('finish')
      if (this[CLOSED])
        this.emit('close')
      this[EMITTING_END] = false
    }
  }

  emit (ev, data) {
    // error and close are only events allowed after calling destroy()
    if (ev !== 'error' && ev !== 'close' && ev !== DESTROYED && this[DESTROYED])
      return
    else if (ev === 'data') {
      if (!data)
        return

      if (this.pipes.length)
        this.pipes.forEach(p =>
          p.dest.write(data) === false && this.pause())
    } else if (ev === 'end') {
      // only actual end gets this treatment
      if (this[EMITTED_END] === true)
        return

      this[EMITTED_END] = true
      this.readable = false

      if (this[DECODER]) {
        data = this[DECODER].end()
        if (data) {
          this.pipes.forEach(p => p.dest.write(data))
          super.emit('data', data)
        }
      }

      this.pipes.forEach(p => {
        p.dest.removeListener('drain', p.ondrain)
        if (p.opts.end)
          p.dest.end()
      })
    } else if (ev === 'close') {
      this[CLOSED] = true
      // don't emit close before 'end' and 'finish'
      if (!this[EMITTED_END] && !this[DESTROYED])
        return
    }

    // TODO: replace with a spread operator when Node v4 support drops
    const args = new Array(arguments.length)
    args[0] = ev
    args[1] = data
    if (arguments.length > 2) {
      for (let i = 2; i < arguments.length; i++) {
        args[i] = arguments[i]
      }
    }

    try {
      return super.emit.apply(this, args)
    } finally {
      if (!isEndish(ev))
        this[MAYBE_EMIT_END]()
      else
        this.removeAllListeners(ev)
    }
  }

  // const all = await stream.collect()
  collect () {
    const buf = []
    buf.dataLength = 0
    this.on('data', c => {
      buf.push(c)
      buf.dataLength += c.length
    })
    return this.promise().then(() => buf)
  }

  // const data = await stream.concat()
  concat () {
    return this[OBJECTMODE]
      ? Promise.reject(new Error('cannot concat in objectMode'))
      : this.collect().then(buf =>
          this[OBJECTMODE]
            ? Promise.reject(new Error('cannot concat in objectMode'))
            : this[ENCODING] ? buf.join('') : B.concat(buf, buf.dataLength))
  }

  // stream.promise().then(() => done, er => emitted error)
  promise () {
    return new Promise((resolve, reject) => {
      this.on(DESTROYED, () => reject(new Error('stream destroyed')))
      this.on('end', () => resolve())
      this.on('error', er => reject(er))
    })
  }

  // for await (let chunk of stream)
  [ASYNCITERATOR] () {
    const next = () => {
      const res = this.read()
      if (res !== null)
        return Promise.resolve({ done: false, value: res })

      if (this[EOF])
        return Promise.resolve({ done: true })

      let resolve = null
      let reject = null
      const onerr = er => {
        this.removeListener('data', ondata)
        this.removeListener('end', onend)
        reject(er)
      }
      const ondata = value => {
        this.removeListener('error', onerr)
        this.removeListener('end', onend)
        this.pause()
        resolve({ value: value, done: !!this[EOF] })
      }
      const onend = () => {
        this.removeListener('error', onerr)
        this.removeListener('data', ondata)
        resolve({ done: true })
      }
      const ondestroy = () => onerr(new Error('stream destroyed'))
      return new Promise((res, rej) => {
        reject = rej
        resolve = res
        this.once(DESTROYED, ondestroy)
        this.once('error', onerr)
        this.once('end', onend)
        this.once('data', ondata)
      })
    }

    return { next }
  }

  // for (let chunk of stream)
  [ITERATOR] () {
    const next = () => {
      const value = this.read()
      const done = value === null
      return { value, done }
    }
    return { next }
  }

  destroy (er) {
    if (this[DESTROYED]) {
      if (er)
        this.emit('error', er)
      else
        this.emit(DESTROYED)
      return this
    }

    this[DESTROYED] = true

    // throw away all buffered data, it's never coming out
    this.buffer = new Yallist()
    this[BUFFERLENGTH] = 0

    if (typeof this.close === 'function' && !this[CLOSED])
      this.close()

    if (er)
      this.emit('error', er)
    else // if no error to emit, still reject pending promises
      this.emit(DESTROYED)

    return this
  }

  static isStream (s) {
    return !!s && (s instanceof Minipass || s instanceof EE && (
      typeof s.pipe === 'function' || // readable
      (typeof s.write === 'function' && typeof s.end === 'function') // writable
    ))
  }
}
PK�����
j\@ꛘR��R����node_modules/minipass/README.mdnu��[�����������# minipass

A _very_ minimal implementation of a [PassThrough
stream](https://nodejs.org/api/stream.html#stream_class_stream_passthrough)

[It's very
fast](https://docs.google.com/spreadsheets/d/1oObKSrVwLX_7Ut4Z6g3fZW-AX1j1-k6w-cDsrkaSbHM/edit#gid=0)
for objects, strings, and buffers.

Supports pipe()ing (including multi-pipe() and backpressure
transmission), buffering data until either a `data` event handler or
`pipe()` is added (so you don't lose the first chunk), and most other
cases where PassThrough is a good idea.

There is a `read()` method, but it's much more efficient to consume
data from this stream via `'data'` events or by calling `pipe()` into
some other stream.  Calling `read()` requires the buffer to be
flattened in some cases, which requires copying memory.

There is also no `unpipe()` method.  Once you start piping, there is
no stopping it!

If you set `objectMode: true` in the options, then whatever is written
will be emitted.  Otherwise, it'll do a minimal amount of Buffer
copying to ensure proper Streams semantics when `read(n)` is called.

`objectMode` can also be set by doing `stream.objectMode = true`, or by
writing any non-string/non-buffer data.  `objectMode` cannot be set to
false once it is set.

This is not a `through` or `through2` stream.  It doesn't transform
the data, it just passes it right through.  If you want to transform
the data, extend the class, and override the `write()` method.  Once
you're done transforming the data however you want, call
`super.write()` with the transform output.

For some examples of streams that extend Minipass in various ways, check
out:

- [minizlib](http://npm.im/minizlib)
- [fs-minipass](http://npm.im/fs-minipass)
- [tar](http://npm.im/tar)
- [minipass-collect](http://npm.im/minipass-collect)
- [minipass-flush](http://npm.im/minipass-flush)
- [minipass-pipeline](http://npm.im/minipass-pipeline)
- [tap](http://npm.im/tap)
- [tap-parser](http://npm.im/tap)
- [treport](http://npm.im/tap)

## Differences from Node.js Streams

There are several things that make Minipass streams different from (and in
some ways superior to) Node.js core streams.

Please read these caveats if you are familiar with noode-core streams and
intend to use Minipass streams in your programs.

### Timing

Minipass streams are designed to support synchronous use-cases.  Thus, data
is emitted as soon as it is available, always.  It is buffered until read,
but no longer.  Another way to look at it is that Minipass streams are
exactly as synchronous as the logic that writes into them.

This can be surprising if your code relies on `PassThrough.write()` always
providing data on the next tick rather than the current one, or being able
to call `resume()` and not have the entire buffer disappear immediately.

However, without this synchronicity guarantee, there would be no way for
Minipass to achieve the speeds it does, or support the synchronous use
cases that it does.  Simply put, waiting takes time.

This non-deferring approach makes Minipass streams much easier to reason
about, especially in the context of Promises and other flow-control
mechanisms.

### No High/Low Water Marks

Node.js core streams will optimistically fill up a buffer, returning `true`
on all writes until the limit is hit, even if the data has nowhere to go.
Then, they will not attempt to draw more data in until the buffer size dips
below a minimum value.

Minipass streams are much simpler.  The `write()` method will return `true`
if the data has somewhere to go (which is to say, given the timing
guarantees, that the data is already there by the time `write()` returns).

If the data has nowhere to go, then `write()` returns false, and the data
sits in a buffer, to be drained out immediately as soon as anyone consumes
it.

### Hazards of Buffering (or: Why Minipass Is So Fast)

Since data written to a Minipass stream is immediately written all the way
through the pipeline, and `write()` always returns true/false based on
whether the data was fully flushed, backpressure is communicated
immediately to the upstream caller.  This minimizes buffering.

Consider this case:

```js
const {PassThrough} = require('stream')
const p1 = new PassThrough({ highWaterMark: 1024 })
const p2 = new PassThrough({ highWaterMark: 1024 })
const p3 = new PassThrough({ highWaterMark: 1024 })
const p4 = new PassThrough({ highWaterMark: 1024 })

p1.pipe(p2).pipe(p3).pipe(p4)
p4.on('data', () => console.log('made it through'))

// this returns false and buffers, then writes to p2 on next tick (1)
// p2 returns false and buffers, pausing p1, then writes to p3 on next tick (2)
// p3 returns false and buffers, pausing p2, then writes to p4 on next tick (3)
// p4 returns false and buffers, pausing p3, then emits 'data' and 'drain'
// on next tick (4)
// p3 sees p4's 'drain' event, and calls resume(), emitting 'resume' and
// 'drain' on next tick (5)
// p2 sees p3's 'drain', calls resume(), emits 'resume' and 'drain' on next tick (6)
// p1 sees p2's 'drain', calls resume(), emits 'resume' and 'drain' on next
// tick (7)

p1.write(Buffer.alloc(2048)) // returns false
```

Along the way, the data was buffered and deferred at each stage, and
multiple event deferrals happened, for an unblocked pipeline where it was
perfectly safe to write all the way through!

Furthermore, setting a `highWaterMark` of `1024` might lead someone reading
the code to think an advisory maximum of 1KiB is being set for the
pipeline.  However, the actual advisory buffering level is the _sum_ of
`highWaterMark` values, since each one has its own bucket.

Consider the Minipass case:

```js
const m1 = new Minipass()
const m2 = new Minipass()
const m3 = new Minipass()
const m4 = new Minipass()

m1.pipe(m2).pipe(m3).pipe(m4)
m4.on('data', () => console.log('made it through'))

// m1 is flowing, so it writes the data to m2 immediately
// m2 is flowing, so it writes the data to m3 immediately
// m3 is flowing, so it writes the data to m4 immediately
// m4 is flowing, so it fires the 'data' event immediately, returns true
// m4's write returned true, so m3 is still flowing, returns true
// m3's write returned true, so m2 is still flowing, returns true
// m2's write returned true, so m1 is still flowing, returns true
// No event deferrals or buffering along the way!

m1.write(Buffer.alloc(2048)) // returns true
```

It is extremely unlikely that you _don't_ want to buffer any data written,
or _ever_ buffer data that can be flushed all the way through.  Neither
node-core streams nor Minipass ever fail to buffer written data, but
node-core streams do a lot of unnecessary buffering and pausing.

As always, the faster implementation is the one that does less stuff and
waits less time to do it.

### Immediately emit `end` for empty streams (when not paused)

If a stream is not paused, and `end()` is called before writing any data
into it, then it will emit `end` immediately.

If you have logic that occurs on the `end` event which you don't want to
potentially happen immediately (for example, closing file descriptors,
moving on to the next entry in an archive parse stream, etc.) then be sure
to call `stream.pause()` on creation, and then `stream.resume()` once you
are ready to respond to the `end` event.

### Emit `end` When Asked

One hazard of immediately emitting `'end'` is that you may not yet have had
a chance to add a listener.  In order to avoid this hazard, Minipass
streams safely re-emit the `'end'` event if a new listener is added after
`'end'` has been emitted.

Ie, if you do `stream.on('end', someFunction)`, and the stream has already
emitted `end`, then it will call the handler right away.  (You can think of
this somewhat like attaching a new `.then(fn)` to a previously-resolved
Promise.)

To prevent calling handlers multiple times who would not expect multiple
ends to occur, all listeners are removed from the `'end'` event whenever it
is emitted.

### Impact of "immediate flow" on Tee-streams

A "tee stream" is a stream piping to multiple destinations:

```js
const tee = new Minipass()
t.pipe(dest1)
t.pipe(dest2)
t.write('foo') // goes to both destinations
```

Since Minipass streams _immediately_ process any pending data through the
pipeline when a new pipe destination is added, this can have surprising
effects, especially when a stream comes in from some other function and may
or may not have data in its buffer.

```js
// WARNING! WILL LOSE DATA!
const src = new Minipass()
src.write('foo')
src.pipe(dest1) // 'foo' chunk flows to dest1 immediately, and is gone
src.pipe(dest2) // gets nothing!
```

The solution is to create a dedicated tee-stream junction that pipes to
both locations, and then pipe to _that_ instead.

```js
// Safe example: tee to both places
const src = new Minipass()
src.write('foo')
const tee = new Minipass()
tee.pipe(dest1)
tee.pipe(dest2)
stream.pipe(tee) // tee gets 'foo', pipes to both locations
```

The same caveat applies to `on('data')` event listeners.  The first one
added will _immediately_ receive all of the data, leaving nothing for the
second:

```js
// WARNING! WILL LOSE DATA!
const src = new Minipass()
src.write('foo')
src.on('data', handler1) // receives 'foo' right away
src.on('data', handler2) // nothing to see here!
```

Using a dedicated tee-stream can be used in this case as well:

```js
// Safe example: tee to both data handlers
const src = new Minipass()
src.write('foo')
const tee = new Minipass()
tee.on('data', handler1)
tee.on('data', handler2)
src.pipe(tee)
```

## USAGE

It's a stream!  Use it like a stream and it'll most likely do what you want.

```js
const Minipass = require('minipass')
const mp = new Minipass(options) // optional: { encoding, objectMode }
mp.write('foo')
mp.pipe(someOtherStream)
mp.end('bar')
```

### OPTIONS

* `encoding` How would you like the data coming _out_ of the stream to be
  encoded?  Accepts any values that can be passed to `Buffer.toString()`.
* `objectMode` Emit data exactly as it comes in.  This will be flipped on
  by default if you write() something other than a string or Buffer at any
  point.  Setting `objectMode: true` will prevent setting any encoding
  value.

### API

Implements the user-facing portions of Node.js's `Readable` and `Writable`
streams.

### Methods

* `write(chunk, [encoding], [callback])` - Put data in.  (Note that, in the
  base Minipass class, the same data will come out.)  Returns `false` if
  the stream will buffer the next write, or true if it's still in
  "flowing" mode.
* `end([chunk, [encoding]], [callback])` - Signal that you have no more
  data to write.  This will queue an `end` event to be fired when all the
  data has been consumed.
* `setEncoding(encoding)` - Set the encoding for data coming of the
  stream.  This can only be done once.
* `pause()` - No more data for a while, please.  This also prevents `end`
  from being emitted for empty streams until the stream is resumed.
* `resume()` - Resume the stream.  If there's data in the buffer, it is
  all discarded.  Any buffered events are immediately emitted.
* `pipe(dest)` - Send all output to the stream provided.  There is no way
  to unpipe.  When data is emitted, it is immediately written to any and
  all pipe destinations.
* `on(ev, fn)`, `emit(ev, fn)` - Minipass streams are EventEmitters.
  Some events are given special treatment, however.  (See below under
  "events".)
* `promise()` - Returns a Promise that resolves when the stream emits
  `end`, or rejects if the stream emits `error`.
* `collect()` - Return a Promise that resolves on `end` with an array
  containing each chunk of data that was emitted, or rejects if the
  stream emits `error`.  Note that this consumes the stream data.
* `concat()` - Same as `collect()`, but concatenates the data into a
  single Buffer object.  Will reject the returned promise if the stream is
  in objectMode, or if it goes into objectMode by the end of the data.
* `read(n)` - Consume `n` bytes of data out of the buffer.  If `n` is not
  provided, then consume all of it.  If `n` bytes are not available, then
  it returns null.  **Note** consuming streams in this way is less
  efficient, and can lead to unnecessary Buffer copying.
* `destroy([er])` - Destroy the stream.  If an error is provided, then an
  `'error'` event is emitted.  If the stream has a `close()` method, and
  has not emitted a `'close'` event yet, then `stream.close()` will be
  called.  Any Promises returned by `.promise()`, `.collect()` or
  `.concat()` will be rejected.  After being destroyed, writing to the
  stream will emit an error.  No more data will be emitted if the stream is
  destroyed, even if it was previously buffered.

### Properties

* `bufferLength` Read-only.  Total number of bytes buffered, or in the case
  of objectMode, the total number of objects.
* `encoding` The encoding that has been set.  (Setting this is equivalent
  to calling `setEncoding(enc)` and has the same prohibition against
  setting multiple times.)
* `flowing` Read-only.  Boolean indicating whether a chunk written to the
  stream will be immediately emitted.
* `emittedEnd` Read-only.  Boolean indicating whether the end-ish events
  (ie, `end`, `prefinish`, `finish`) have been emitted.  Note that
  listening on any end-ish event will immediateyl re-emit it if it has
  already been emitted.
* `writable` Whether the stream is writable.  Default `true`.  Set to
  `false` when `end()`
* `readable` Whether the stream is readable.  Default `true`.
* `buffer` A [yallist](http://npm.im/yallist) linked list of chunks written
  to the stream that have not yet been emitted.  (It's probably a bad idea
  to mess with this.)
* `pipes` A [yallist](http://npm.im/yallist) linked list of streams that
  this stream is piping into.  (It's probably a bad idea to mess with
  this.)
* `destroyed` A getter that indicates whether the stream was destroyed.
* `paused` True if the stream has been explicitly paused, otherwise false.
* `objectMode` Indicates whether the stream is in `objectMode`.  Once set
  to `true`, it cannot be set to `false`.

### Events

* `data` Emitted when there's data to read.  Argument is the data to read.
  This is never emitted while not flowing.  If a listener is attached, that
  will resume the stream.
* `end` Emitted when there's no more data to read.  This will be emitted
  immediately for empty streams when `end()` is called.  If a listener is
  attached, and `end` was already emitted, then it will be emitted again.
  All listeners are removed when `end` is emitted.
* `prefinish` An end-ish event that follows the same logic as `end` and is
  emitted in the same conditions where `end` is emitted.  Emitted after
  `'end'`.
* `finish` An end-ish event that follows the same logic as `end` and is
  emitted in the same conditions where `end` is emitted.  Emitted after
  `'prefinish'`.
* `close` An indication that an underlying resource has been released.
  Minipass does not emit this event, but will defer it until after `end`
  has been emitted, since it throws off some stream libraries otherwise.
* `drain` Emitted when the internal buffer empties, and it is again
  suitable to `write()` into the stream.
* `readable` Emitted when data is buffered and ready to be read by a
  consumer.
* `resume` Emitted when stream changes state from buffering to flowing
  mode.  (Ie, when `resume` is called, `pipe` is called, or a `data` event
  listener is added.)

### Static Methods

* `Minipass.isStream(stream)` Returns `true` if the argument is a stream,
  and false otherwise.  To be considered a stream, the object must be
  either an instance of Minipass, or an EventEmitter that has either a
  `pipe()` method, or both `write()` and `end()` methods.  (Pretty much any
  stream in node-land will return `true` for this.)

## EXAMPLES

Here are some examples of things you can do with Minipass streams.

### simple "are you done yet" promise

```js
mp.promise().then(() => {
  // stream is finished
}, er => {
  // stream emitted an error
})
```

### collecting

```js
mp.collect().then(all => {
  // all is an array of all the data emitted
  // encoding is supported in this case, so
  // so the result will be a collection of strings if
  // an encoding is specified, or buffers/objects if not.
  //
  // In an async function, you may do
  // const data = await stream.collect()
})
```

### collecting into a single blob

This is a bit slower because it concatenates the data into one chunk for
you, but if you're going to do it yourself anyway, it's convenient this
way:

```js
mp.concat().then(onebigchunk => {
  // onebigchunk is a string if the stream
  // had an encoding set, or a buffer otherwise.
})
```

### iteration

You can iterate over streams synchronously or asynchronously in
platforms that support it.

Synchronous iteration will end when the currently available data is
consumed, even if the `end` event has not been reached.  In string and
buffer mode, the data is concatenated, so unless multiple writes are
occurring in the same tick as the `read()`, sync iteration loops will
generally only have a single iteration.

To consume chunks in this way exactly as they have been written, with
no flattening, create the stream with the `{ objectMode: true }`
option.

```js
const mp = new Minipass({ objectMode: true })
mp.write('a')
mp.write('b')
for (let letter of mp) {
  console.log(letter) // a, b
}
mp.write('c')
mp.write('d')
for (let letter of mp) {
  console.log(letter) // c, d
}
mp.write('e')
mp.end()
for (let letter of mp) {
  console.log(letter) // e
}
for (let letter of mp) {
  console.log(letter) // nothing
}
```

Asynchronous iteration will continue until the end event is reached,
consuming all of the data.

```js
const mp = new Minipass({ encoding: 'utf8' })

// some source of some data
let i = 5
const inter = setInterval(() => {
  if (i --> 0)
    mp.write(Buffer.from('foo\n', 'utf8'))
  else {
    mp.end()
    clearInterval(inter)
  }
}, 100)

// consume the data with asynchronous iteration
async function consume () {
  for await (let chunk of mp) {
    console.log(chunk)
  }
  return 'ok'
}

consume().then(res => console.log(res))
// logs `foo\n` 5 times, and then `ok`
```

### subclass that `console.log()`s everything written into it

```js
class Logger extends Minipass {
  write (chunk, encoding, callback) {
    console.log('WRITE', chunk, encoding)
    return super.write(chunk, encoding, callback)
  }
  end (chunk, encoding, callback) {
    console.log('END', chunk, encoding)
    return super.end(chunk, encoding, callback)
  }
}

someSource.pipe(new Logger()).pipe(someDest)
```

### same thing, but using an inline anonymous class

```js
// js classes are fun
someSource
  .pipe(new (class extends Minipass {
    emit (ev, ...data) {
      // let's also log events, because debugging some weird thing
      console.log('EMIT', ev)
      return super.emit(ev, ...data)
    }
    write (chunk, encoding, callback) {
      console.log('WRITE', chunk, encoding)
      return super.write(chunk, encoding, callback)
    }
    end (chunk, encoding, callback) {
      console.log('END', chunk, encoding)
      return super.end(chunk, encoding, callback)
    }
  }))
  .pipe(someDest)
```

### subclass that defers 'end' for some reason

```js
class SlowEnd extends Minipass {
  emit (ev, ...args) {
    if (ev === 'end') {
      console.log('going to end, hold on a sec')
      setTimeout(() => {
        console.log('ok, ready to end now')
        super.emit('end', ...args)
      }, 100)
    } else {
      return super.emit(ev, ...args)
    }
  }
}
```

### transform that creates newline-delimited JSON

```js
class NDJSONEncode extends Minipass {
  write (obj, cb) {
    try {
      // JSON.stringify can throw, emit an error on that
      return super.write(JSON.stringify(obj) + '\n', 'utf8', cb)
    } catch (er) {
      this.emit('error', er)
    }
  }
  end (obj, cb) {
    if (typeof obj === 'function') {
      cb = obj
      obj = undefined
    }
    if (obj !== undefined) {
      this.write(obj)
    }
    return super.end(cb)
  }
}
```

### transform that parses newline-delimited JSON

```js
class NDJSONDecode extends Minipass {
  constructor (options) {
    // always be in object mode, as far as Minipass is concerned
    super({ objectMode: true })
    this._jsonBuffer = ''
  }
  write (chunk, encoding, cb) {
    if (typeof chunk === 'string' &&
        typeof encoding === 'string' &&
        encoding !== 'utf8') {
      chunk = Buffer.from(chunk, encoding).toString()
    } else if (Buffer.isBuffer(chunk))
      chunk = chunk.toString()
    }
    if (typeof encoding === 'function') {
      cb = encoding
    }
    const jsonData = (this._jsonBuffer + chunk).split('\n')
    this._jsonBuffer = jsonData.pop()
    for (let i = 0; i < jsonData.length; i++) {
      let parsed
      try {
        super.write(parsed)
      } catch (er) {
        this.emit('error', er)
        continue
      }
    }
    if (cb)
      cb()
  }
}
```
PK�����
j\�!����������node_modules/minipass/LICENSEnu��[�����������The ISC License

Copyright (c) npm, Inc. and Contributors

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 AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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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j\���;������"��node_modules/minipass/package.jsonnu��[�����������{
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  "_id": "minipass@2.9.0",
  "_inBundle": false,
  "_integrity": "sha512-wxfUjg9WebH+CUDX/CdbRlh5SmfZiy/hpkxaRI16Y9W56Pa75sWgd/rvFilSgrauD9NyFymP/+JFV3KwzIsJeg==",
  "_location": "/minizlib/minipass",
  "_phantomChildren": {},
  "_requested": {
    "type": "range",
    "registry": true,
    "raw": "minipass@^2.9.0",
    "name": "minipass",
    "escapedName": "minipass",
    "rawSpec": "^2.9.0",
    "saveSpec": null,
    "fetchSpec": "^2.9.0"
  },
  "_requiredBy": [
    "/minizlib"
  ],
  "_resolved": "https://registry.npmjs.org/minipass/-/minipass-2.9.0.tgz",
  "_shasum": "e713762e7d3e32fed803115cf93e04bca9fcc9a6",
  "_spec": "minipass@^2.9.0",
  "_where": "/Users/mperrotte/npminc/cli/node_modules/minizlib",
  "author": {
    "name": "Isaac Z. Schlueter",
    "email": "i@izs.me",
    "url": "http://blog.izs.me/"
  },
  "bugs": {
    "url": "https://github.com/isaacs/minipass/issues"
  },
  "bundleDependencies": false,
  "dependencies": {
    "safe-buffer": "^5.1.2",
    "yallist": "^3.0.0"
  },
  "deprecated": false,
  "description": "minimal implementation of a PassThrough stream",
  "devDependencies": {
    "end-of-stream": "^1.4.0",
    "tap": "^14.6.5",
    "through2": "^2.0.3"
  },
  "files": [
    "index.js"
  ],
  "homepage": "https://github.com/isaacs/minipass#readme",
  "keywords": [
    "passthrough",
    "stream"
  ],
  "license": "ISC",
  "main": "index.js",
  "name": "minipass",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/isaacs/minipass.git"
  },
  "scripts": {
    "postpublish": "git push origin --follow-tags",
    "postversion": "npm publish",
    "preversion": "npm test",
    "test": "tap"
  },
  "tap": {
    "check-coverage": true
  },
  "version": "2.9.0"
}
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j\m�t?��?����package.jsonnu��[�����������{
  "_from": "minizlib@^1.2.1",
  "_id": "minizlib@1.3.3",
  "_inBundle": false,
  "_integrity": "sha512-6ZYMOEnmVsdCeTJVE0W9ZD+pVnE8h9Hma/iOwwRDsdQoePpoX56/8B6z3P9VNwppJuBKNRuFDRNRqRWexT9G9Q==",
  "_location": "/minizlib",
  "_phantomChildren": {
    "safe-buffer": "5.1.2",
    "yallist": "3.0.3"
  },
  "_requested": {
    "type": "range",
    "registry": true,
    "raw": "minizlib@^1.2.1",
    "name": "minizlib",
    "escapedName": "minizlib",
    "rawSpec": "^1.2.1",
    "saveSpec": null,
    "fetchSpec": "^1.2.1"
  },
  "_requiredBy": [
    "/tar"
  ],
  "_resolved": "https://registry.npmjs.org/minizlib/-/minizlib-1.3.3.tgz",
  "_shasum": "2290de96818a34c29551c8a8d301216bd65a861d",
  "_spec": "minizlib@^1.2.1",
  "_where": "/Users/mperrotte/npminc/cli/node_modules/tar",
  "author": {
    "name": "Isaac Z. Schlueter",
    "email": "i@izs.me",
    "url": "http://blog.izs.me/"
  },
  "bugs": {
    "url": "https://github.com/isaacs/minizlib/issues"
  },
  "bundleDependencies": false,
  "dependencies": {
    "minipass": "^2.9.0"
  },
  "deprecated": false,
  "description": "A small fast zlib stream built on [minipass](http://npm.im/minipass) and Node.js's zlib binding.",
  "devDependencies": {
    "tap": "^12.0.1"
  },
  "files": [
    "index.js",
    "constants.js"
  ],
  "homepage": "https://github.com/isaacs/minizlib#readme",
  "keywords": [
    "zlib",
    "gzip",
    "gunzip",
    "deflate",
    "inflate",
    "compression",
    "zip",
    "unzip"
  ],
  "license": "MIT",
  "main": "index.js",
  "name": "minizlib",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/isaacs/minizlib.git"
  },
  "scripts": {
    "postpublish": "git push origin --all; git push origin --tags",
    "postversion": "npm publish",
    "preversion": "npm test",
    "test": "tap test/*.js --100 -J"
  },
  "version": "1.3.3"
}
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