mirror of
https://github.com/musix-org/musix-oss
synced 2024-11-13 02:20:18 +00:00
99 lines
2.6 KiB
JavaScript
99 lines
2.6 KiB
JavaScript
'use strict'
|
|
const types = require('./types.js')
|
|
const MiniPass = require('minipass')
|
|
|
|
const SLURP = Symbol('slurp')
|
|
module.exports = class ReadEntry extends MiniPass {
|
|
constructor (header, ex, gex) {
|
|
super()
|
|
// read entries always start life paused. this is to avoid the
|
|
// situation where Minipass's auto-ending empty streams results
|
|
// in an entry ending before we're ready for it.
|
|
this.pause()
|
|
this.extended = ex
|
|
this.globalExtended = gex
|
|
this.header = header
|
|
this.startBlockSize = 512 * Math.ceil(header.size / 512)
|
|
this.blockRemain = this.startBlockSize
|
|
this.remain = header.size
|
|
this.type = header.type
|
|
this.meta = false
|
|
this.ignore = false
|
|
switch (this.type) {
|
|
case 'File':
|
|
case 'OldFile':
|
|
case 'Link':
|
|
case 'SymbolicLink':
|
|
case 'CharacterDevice':
|
|
case 'BlockDevice':
|
|
case 'Directory':
|
|
case 'FIFO':
|
|
case 'ContiguousFile':
|
|
case 'GNUDumpDir':
|
|
break
|
|
|
|
case 'NextFileHasLongLinkpath':
|
|
case 'NextFileHasLongPath':
|
|
case 'OldGnuLongPath':
|
|
case 'GlobalExtendedHeader':
|
|
case 'ExtendedHeader':
|
|
case 'OldExtendedHeader':
|
|
this.meta = true
|
|
break
|
|
|
|
// NOTE: gnutar and bsdtar treat unrecognized types as 'File'
|
|
// it may be worth doing the same, but with a warning.
|
|
default:
|
|
this.ignore = true
|
|
}
|
|
|
|
this.path = header.path
|
|
this.mode = header.mode
|
|
if (this.mode)
|
|
this.mode = this.mode & 0o7777
|
|
this.uid = header.uid
|
|
this.gid = header.gid
|
|
this.uname = header.uname
|
|
this.gname = header.gname
|
|
this.size = header.size
|
|
this.mtime = header.mtime
|
|
this.atime = header.atime
|
|
this.ctime = header.ctime
|
|
this.linkpath = header.linkpath
|
|
this.uname = header.uname
|
|
this.gname = header.gname
|
|
|
|
if (ex) this[SLURP](ex)
|
|
if (gex) this[SLURP](gex, true)
|
|
}
|
|
|
|
write (data) {
|
|
const writeLen = data.length
|
|
if (writeLen > this.blockRemain)
|
|
throw new Error('writing more to entry than is appropriate')
|
|
|
|
const r = this.remain
|
|
const br = this.blockRemain
|
|
this.remain = Math.max(0, r - writeLen)
|
|
this.blockRemain = Math.max(0, br - writeLen)
|
|
if (this.ignore)
|
|
return true
|
|
|
|
if (r >= writeLen)
|
|
return super.write(data)
|
|
|
|
// r < writeLen
|
|
return super.write(data.slice(0, r))
|
|
}
|
|
|
|
[SLURP] (ex, global) {
|
|
for (let k in ex) {
|
|
// we slurp in everything except for the path attribute in
|
|
// a global extended header, because that's weird.
|
|
if (ex[k] !== null && ex[k] !== undefined &&
|
|
!(global && k === 'path'))
|
|
this[k] = ex[k]
|
|
}
|
|
}
|
|
}
|