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      <a href="../../index.html">All files</a> / <a href="index.html">tar/lib</a> list.js
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">'use strict'
&nbsp;
// XXX: This shares a lot in common with extract.js
// maybe some DRY opportunity here?
&nbsp;
// tar -t
const hlo = require('./high-level-opt.js')
const Parser = require('./parse.js')
const fs = require('fs')
const fsm = require('fs-minipass')
const path = require('path')
&nbsp;
const t = module.exports = (opt_, files, cb) =&gt; {
  if (typeof opt_ === 'function')
    cb = opt_, files = null, opt_ = {}
  else if (Array.isArray(opt_))
    files = opt_, opt_ = {}
&nbsp;
  if (typeof files === 'function')
    cb = files, files = null
&nbsp;
  if (!files)
    files = []
  else
    files = Array.from(files)
&nbsp;
  const opt = hlo(opt_)
&nbsp;
  if (opt.sync &amp;&amp; typeof cb === 'function')
    throw new TypeError('callback not supported for sync tar functions')
&nbsp;
  if (!opt.file &amp;&amp; typeof cb === 'function')
    throw new TypeError('callback only supported with file option')
&nbsp;
  if (files.length)
    filesFilter(opt, files)
&nbsp;
  if (!opt.noResume)
    onentryFunction(opt)
&nbsp;
  return opt.file &amp;&amp; opt.sync ? listFileSync(opt)
    : opt.file ? listFile(opt, cb)
    : list(opt)
}
&nbsp;
const onentryFunction = opt =&gt; {
  const onentry = opt.onentry
  opt.onentry = onentry ? e =&gt; {
    onentry(e)
    e.resume()
  } : e =&gt; e.resume()
}
&nbsp;
// construct a filter that limits the file entries listed
// include child entries if a dir is included
const filesFilter = (opt, files) =&gt; {
  const map = new Map(files.map(f =&gt; [f.replace(/\/+$/, ''), true]))
  const filter = opt.filter
&nbsp;
  const mapHas = (file, r) =&gt; {
    const root = r || path.parse(file).root || '.'
    const ret = file === root ? false
      : map.has(file) ? map.get(file)
      : mapHas(path.dirname(file), root)
&nbsp;
    map.set(file, ret)
    return ret
  }
&nbsp;
  opt.filter = filter
    ? (file, entry) =&gt; filter(file, entry) &amp;&amp; mapHas(file.replace(/\/+$/, ''))
    : file =&gt; mapHas(file.replace(/\/+$/, ''))
}
&nbsp;
const listFileSync = opt =&gt; {
  const p = list(opt)
  const file = opt.file
  let threw = true
  let fd
  try {
    const stat = fs.statSync(file)
    const readSize = opt.maxReadSize || 16*1024*1024
    if (stat.size &lt; readSize) {
      p.end(fs.readFileSync(file))
    } else {
      let pos = 0
      const buf = Buffer.allocUnsafe(readSize)
      fd = fs.openSync(file, 'r')
      while (pos &lt; stat.size) {
        let bytesRead = fs.readSync(fd, buf, 0, readSize, pos)
        pos += bytesRead
        p.write(buf.slice(0, bytesRead))
      }
      p.end()
    }
    threw = false
  } finally {
    if (threw &amp;&amp; fd)
      try { fs.closeSync(fd) } catch (er) {}
  }
}
&nbsp;
const listFile = (opt, cb) =&gt; {
  const parse = new Parser(opt)
  const readSize = opt.maxReadSize || 16*1024*1024
&nbsp;
  const file = opt.file
  const p = new Promise((resolve, reject) =&gt; {
    parse.on('error', reject)
    parse.on('end', resolve)
&nbsp;
    fs.stat(file, (er, stat) =&gt; {
      if (er)
        reject(er)
      else {
        const stream = new fsm.ReadStream(file, {
          readSize: readSize,
          size: stat.size
        })
        stream.on('error', reject)
        stream.pipe(parse)
      }
    })
  })
  return cb ? p.then(cb, cb) : p
}
&nbsp;
const list = opt =&gt; new Parser(opt)
&nbsp;</pre></td></tr>
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