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| '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)
|