1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
'use strict'
const Buffer = require('./buffer.js')
// XXX: This shares a lot in common with extract.js
// maybe some DRY opportunity here?
// 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')
const t = 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)
if (!opt.noResume)
onentryFunction(opt)
return opt.file && opt.sync ? listFileSync(opt)
: opt.file ? listFile(opt, cb)
: list(opt)
}
const onentryFunction = opt => {
const onentry = opt.onentry
opt.onentry = onentry ? e => {
onentry(e)
e.resume()
} : e => e.resume()
}
// 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 listFileSync = opt => {
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 < readSize) {
p.end(fs.readFileSync(file))
} else {
let pos = 0
const buf = Buffer.allocUnsafe(readSize)
fd = fs.openSync(file, 'r')
while (pos < 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 && fd)
try { fs.closeSync(fd) } catch (er) {}
}
}
const listFile = (opt, cb) => {
const parse = new Parser(opt)
const readSize = opt.maxReadSize || 16*1024*1024
const file = opt.file
const p = new Promise((resolve, reject) => {
parse.on('error', reject)
parse.on('end', resolve)
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(parse)
}
})
})
return cb ? p.then(cb, cb) : p
}
const list = opt => new Parser(opt)
|
