129 lines
3.0 KiB
JavaScript
129 lines
3.0 KiB
JavaScript
'use strict'
|
|
|
|
// 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)
|