[6a3a178] | 1 | 'use strict'
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| 2 |
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| 3 | // XXX: This shares a lot in common with extract.js
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| 4 | // maybe some DRY opportunity here?
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| 5 |
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| 6 | // tar -t
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| 7 | const hlo = require('./high-level-opt.js')
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| 8 | const Parser = require('./parse.js')
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| 9 | const fs = require('fs')
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| 10 | const fsm = require('fs-minipass')
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| 11 | const path = require('path')
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| 12 | const stripSlash = require('./strip-trailing-slashes.js')
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| 13 |
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| 14 | module.exports = (opt_, files, cb) => {
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| 15 | if (typeof opt_ === 'function')
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| 16 | cb = opt_, files = null, opt_ = {}
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| 17 | else if (Array.isArray(opt_))
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| 18 | files = opt_, opt_ = {}
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| 19 |
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| 20 | if (typeof files === 'function')
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| 21 | cb = files, files = null
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| 22 |
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| 23 | if (!files)
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| 24 | files = []
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| 25 | else
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| 26 | files = Array.from(files)
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| 27 |
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| 28 | const opt = hlo(opt_)
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| 29 |
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| 30 | if (opt.sync && typeof cb === 'function')
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| 31 | throw new TypeError('callback not supported for sync tar functions')
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| 32 |
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| 33 | if (!opt.file && typeof cb === 'function')
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| 34 | throw new TypeError('callback only supported with file option')
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| 35 |
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| 36 | if (files.length)
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| 37 | filesFilter(opt, files)
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| 38 |
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| 39 | if (!opt.noResume)
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| 40 | onentryFunction(opt)
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| 41 |
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| 42 | return opt.file && opt.sync ? listFileSync(opt)
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| 43 | : opt.file ? listFile(opt, cb)
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| 44 | : list(opt)
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| 45 | }
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| 46 |
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| 47 | const onentryFunction = opt => {
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| 48 | const onentry = opt.onentry
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| 49 | opt.onentry = onentry ? e => {
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| 50 | onentry(e)
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| 51 | e.resume()
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| 52 | } : e => e.resume()
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| 53 | }
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| 54 |
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| 55 | // construct a filter that limits the file entries listed
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| 56 | // include child entries if a dir is included
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| 57 | const filesFilter = (opt, files) => {
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| 58 | const map = new Map(files.map(f => [stripSlash(f), true]))
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| 59 | const filter = opt.filter
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| 60 |
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| 61 | const mapHas = (file, r) => {
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| 62 | const root = r || path.parse(file).root || '.'
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| 63 | const ret = file === root ? false
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| 64 | : map.has(file) ? map.get(file)
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| 65 | : mapHas(path.dirname(file), root)
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| 66 |
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| 67 | map.set(file, ret)
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| 68 | return ret
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| 69 | }
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| 70 |
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| 71 | opt.filter = filter
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| 72 | ? (file, entry) => filter(file, entry) && mapHas(stripSlash(file))
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| 73 | : file => mapHas(stripSlash(file))
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| 74 | }
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| 75 |
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| 76 | const listFileSync = opt => {
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| 77 | const p = list(opt)
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| 78 | const file = opt.file
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| 79 | let threw = true
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| 80 | let fd
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| 81 | try {
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| 82 | const stat = fs.statSync(file)
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| 83 | const readSize = opt.maxReadSize || 16 * 1024 * 1024
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| 84 | if (stat.size < readSize)
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| 85 | p.end(fs.readFileSync(file))
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| 86 | else {
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| 87 | let pos = 0
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| 88 | const buf = Buffer.allocUnsafe(readSize)
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| 89 | fd = fs.openSync(file, 'r')
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| 90 | while (pos < stat.size) {
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| 91 | const bytesRead = fs.readSync(fd, buf, 0, readSize, pos)
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| 92 | pos += bytesRead
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| 93 | p.write(buf.slice(0, bytesRead))
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| 94 | }
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| 95 | p.end()
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| 96 | }
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| 97 | threw = false
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| 98 | } finally {
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| 99 | if (threw && fd) {
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| 100 | try {
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| 101 | fs.closeSync(fd)
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| 102 | } catch (er) {}
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| 103 | }
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | const listFile = (opt, cb) => {
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| 108 | const parse = new Parser(opt)
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| 109 | const readSize = opt.maxReadSize || 16 * 1024 * 1024
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| 110 |
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| 111 | const file = opt.file
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| 112 | const p = new Promise((resolve, reject) => {
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| 113 | parse.on('error', reject)
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| 114 | parse.on('end', resolve)
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| 115 |
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| 116 | fs.stat(file, (er, stat) => {
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| 117 | if (er)
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| 118 | reject(er)
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| 119 | else {
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| 120 | const stream = new fsm.ReadStream(file, {
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| 121 | readSize: readSize,
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| 122 | size: stat.size,
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| 123 | })
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| 124 | stream.on('error', reject)
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| 125 | stream.pipe(parse)
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| 126 | }
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| 127 | })
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| 128 | })
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| 129 | return cb ? p.then(cb, cb) : p
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| 130 | }
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| 131 |
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| 132 | const list = opt => new Parser(opt)
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