source: trip-planner-front/node_modules/tar/lib/read-entry.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.7 KB
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1'use strict'
2const MiniPass = require('minipass')
3const normPath = require('./normalize-windows-path.js')
4
5const SLURP = Symbol('slurp')
6module.exports = class ReadEntry extends MiniPass {
7 constructor (header, ex, gex) {
8 super()
9 // read entries always start life paused. this is to avoid the
10 // situation where Minipass's auto-ending empty streams results
11 // in an entry ending before we're ready for it.
12 this.pause()
13 this.extended = ex
14 this.globalExtended = gex
15 this.header = header
16 this.startBlockSize = 512 * Math.ceil(header.size / 512)
17 this.blockRemain = this.startBlockSize
18 this.remain = header.size
19 this.type = header.type
20 this.meta = false
21 this.ignore = false
22 switch (this.type) {
23 case 'File':
24 case 'OldFile':
25 case 'Link':
26 case 'SymbolicLink':
27 case 'CharacterDevice':
28 case 'BlockDevice':
29 case 'Directory':
30 case 'FIFO':
31 case 'ContiguousFile':
32 case 'GNUDumpDir':
33 break
34
35 case 'NextFileHasLongLinkpath':
36 case 'NextFileHasLongPath':
37 case 'OldGnuLongPath':
38 case 'GlobalExtendedHeader':
39 case 'ExtendedHeader':
40 case 'OldExtendedHeader':
41 this.meta = true
42 break
43
44 // NOTE: gnutar and bsdtar treat unrecognized types as 'File'
45 // it may be worth doing the same, but with a warning.
46 default:
47 this.ignore = true
48 }
49
50 this.path = normPath(header.path)
51 this.mode = header.mode
52 if (this.mode)
53 this.mode = this.mode & 0o7777
54 this.uid = header.uid
55 this.gid = header.gid
56 this.uname = header.uname
57 this.gname = header.gname
58 this.size = header.size
59 this.mtime = header.mtime
60 this.atime = header.atime
61 this.ctime = header.ctime
62 this.linkpath = normPath(header.linkpath)
63 this.uname = header.uname
64 this.gname = header.gname
65
66 if (ex)
67 this[SLURP](ex)
68 if (gex)
69 this[SLURP](gex, true)
70 }
71
72 write (data) {
73 const writeLen = data.length
74 if (writeLen > this.blockRemain)
75 throw new Error('writing more to entry than is appropriate')
76
77 const r = this.remain
78 const br = this.blockRemain
79 this.remain = Math.max(0, r - writeLen)
80 this.blockRemain = Math.max(0, br - writeLen)
81 if (this.ignore)
82 return true
83
84 if (r >= writeLen)
85 return super.write(data)
86
87 // r < writeLen
88 return super.write(data.slice(0, r))
89 }
90
91 [SLURP] (ex, global) {
92 for (const k in ex) {
93 // we slurp in everything except for the path attribute in
94 // a global extended header, because that's weird.
95 if (ex[k] !== null && ex[k] !== undefined &&
96 !(global && k === 'path'))
97 this[k] = k === 'path' || k === 'linkpath' ? normPath(ex[k]) : ex[k]
98 }
99 }
100}
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