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| <a href="../../index.html">All files</a> / <a href="index.html">tar/lib</a> list.js |
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| <span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">'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) |
| </pre></td></tr> |
| </table></pre> |
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