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files >> //proc/self/root/usr/lib/node_modules/npm/node_modules/tar/lib/list.js
'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)
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