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📝 buffer.js (283 bytes)	283 B	0644	✍️ ⬇️ 🗑️
📝 create.js (2,374 bytes)	2.32 KB	0644	✍️ ⬇️ 🗑️
📝 extract.js (2,824 bytes)	2.76 KB	0644	✍️ ⬇️ 🗑️
📝 header.js (9,044 bytes)	8.83 KB	0644	✍️ ⬇️ 🗑️
📝 high-level-opt.js (772 bytes)	772 B	0644	✍️ ⬇️ 🗑️
📝 large-numbers.js (2,210 bytes)	2.16 KB	0644	✍️ ⬇️ 🗑️
📝 list.js (3,152 bytes)	3.08 KB	0644	✍️ ⬇️ 🗑️
📝 mkdir.js (5,178 bytes)	5.06 KB	0644	✍️ ⬇️ 🗑️
📝 mode-fix.js (277 bytes)	277 B	0644	✍️ ⬇️ 🗑️
📝 pack.js (9,614 bytes)	9.39 KB	0644	✍️ ⬇️ 🗑️
📝 parse.js (12,140 bytes)	11.86 KB	0644	✍️ ⬇️ 🗑️
📝 pax.js (4,070 bytes)	3.97 KB	0644	✍️ ⬇️ 🗑️
📝 read-entry.js (2,673 bytes)	2.61 KB	0644	✍️ ⬇️ 🗑️
📝 replace.js (5,492 bytes)	5.36 KB	0644	✍️ ⬇️ 🗑️
📝 types.js (1,095 bytes)	1.07 KB	0644	✍️ ⬇️ 🗑️
📝 unpack.js (16,856 bytes)	16.46 KB	0644	✍️ ⬇️ 🗑️
📝 update.js (852 bytes)	852 B	0644	✍️ ⬇️ 🗑️
📝 warn-mixin.js (309 bytes)	309 B	0644	✍️ ⬇️ 🗑️
📝 winchars.js (533 bytes)	533 B	0644	✍️ ⬇️ 🗑️
📝 write-entry.js (12,053 bytes)	11.77 KB	0644	✍️ ⬇️ 🗑️

✍️ Editing: extract.js

            File: /usr/lib/node_modules/npm/node_modules/tar/lib/extract.js

            Size: 2.76 KB | 
            Last Modified: 2021-03-10 21:36:37        

'use strict'

// tar -x
const hlo = require('./high-level-opt.js')
const Unpack = require('./unpack.js')
const fs = require('fs')
const fsm = require('fs-minipass')
const path = require('path')

const x = module.exports = (opt_, files, cb) => {
  if (typeof opt_ === 'function')
    cb = opt_, files = null, opt_ = {}
  else if (Array.isArray(opt_))
    files = opt_, opt_ = {}

if (typeof files === 'function')
    cb = files, files = null

if (!files)
    files = []
  else
    files = Array.from(files)

const opt = hlo(opt_)

if (opt.sync && typeof cb === 'function')
    throw new TypeError('callback not supported for sync tar functions')

if (!opt.file && typeof cb === 'function')
    throw new TypeError('callback only supported with file option')

if (files.length)
    filesFilter(opt, files)

return opt.file && opt.sync ? extractFileSync(opt)
    : opt.file ? extractFile(opt, cb)
    : opt.sync ? extractSync(opt)
    : extract(opt)
}

// construct a filter that limits the file entries listed
// include child entries if a dir is included
const filesFilter = (opt, files) => {
  const map = new Map(files.map(f => [f.replace(/\/+$/, ''), true]))
  const filter = opt.filter

const mapHas = (file, r) => {
    const root = r || path.parse(file).root || '.'
    const ret = file === root ? false
      : map.has(file) ? map.get(file)
      : mapHas(path.dirname(file), root)

map.set(file, ret)
    return ret
  }

opt.filter = filter
    ? (file, entry) => filter(file, entry) && mapHas(file.replace(/\/+$/, ''))
    : file => mapHas(file.replace(/\/+$/, ''))
}

const extractFileSync = opt => {
  const u = new Unpack.Sync(opt)

const file = opt.file
  let threw = true
  let fd
  const stat = fs.statSync(file)
  // This trades a zero-byte read() syscall for a stat
  // However, it will usually result in less memory allocation
  const readSize = opt.maxReadSize || 16*1024*1024
  const stream = new fsm.ReadStreamSync(file, {
    readSize: readSize,
    size: stat.size
  })
  stream.pipe(u)
}

const extractFile = (opt, cb) => {
  const u = new Unpack(opt)
  const readSize = opt.maxReadSize || 16*1024*1024

const file = opt.file
  const p = new Promise((resolve, reject) => {
    u.on('error', reject)
    u.on('close', resolve)

// This trades a zero-byte read() syscall for a stat
    // However, it will usually result in less memory allocation
    fs.stat(file, (er, stat) => {
      if (er)
        reject(er)
      else {
        const stream = new fsm.ReadStream(file, {
          readSize: readSize,
          size: stat.size
        })
        stream.on('error', reject)
        stream.pipe(u)
      }
    })
  })
  return cb ? p.then(cb, cb) : p
}

const extractSync = opt => {
  return new Unpack.Sync(opt)
}

const extract = opt => {
  return new Unpack(opt)
}

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✍️ Editing: extract.js

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