tar/dist/esm/extract.js

tar for node

// tar -x
import * as fsm from '@isaacs/fs-minipass';
import fs from 'node:fs';
import { dirname, parse } from 'node:path';
import { dealias, isFile, isSync, isSyncFile, } from './options.js';
import { stripTrailingSlashes } from './strip-trailing-slashes.js';
import { Unpack, UnpackSync } from './unpack.js';
export function extract(opt_, files, cb) {
    if (typeof opt_ === 'function') {
        ;
        (cb = opt_), (files = undefined), (opt_ = {});
    }
    else if (Array.isArray(opt_)) {
        ;
        (files = opt_), (opt_ = {});
    }
    if (typeof files === 'function') {
        ;
        (cb = files), (files = undefined);
    }
    if (!files) {
        files = [];
    }
    else {
        files = Array.from(files);
    }
    const opt = dealias(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);
    }
    return isSyncFile(opt)
        ? extractFileSync(opt)
        : isFile(opt)
            ? extractFile(opt, cb)
            : isSync(opt)
                ? extractSync(opt)
                : extract_(opt);
}
// 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 => [stripTrailingSlashes(f), true]));
    const filter = opt.filter;
    const mapHas = (file, r = '') => {
        const root = r || parse(file).root || '.';
        let ret;
        if (file === root)
            ret = false;
        else {
            const m = map.get(file);
            if (m !== undefined) {
                ret = m;
            }
            else {
                ret = mapHas(dirname(file), root);
            }
        }
        map.set(file, ret);
        return ret;
    };
    opt.filter = filter
        ? (file, entry) => filter(file, entry) && mapHas(stripTrailingSlashes(file))
        : file => mapHas(stripTrailingSlashes(file));
};
const extractFileSync = (opt) => {
    const u = new UnpackSync(opt);
    const file = opt.file;
    const stat = fs.statSync(file);
    // This trades a zero-byte read() syscall for a stat
    // However, it will usually result in less memory allocation
    const readSize = opt.maxReadSize || 16 * 1024 * 1024;
    const stream = new fsm.ReadStreamSync(file, {
        readSize: readSize,
        size: stat.size,
    });
    stream.pipe(u);
};
const extractFile = (opt, cb) => {
    const u = new Unpack(opt);
    const readSize = opt.maxReadSize || 16 * 1024 * 1024;
    const file = opt.file;
    const p = new Promise((resolve, reject) => {
        u.on('error', reject);
        u.on('close', resolve);
        // This trades a zero-byte read() syscall for a stat
        // However, it will usually result in less memory allocation
        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(u);
            }
        });
    });
    return cb ? p.then(cb, cb) : p;
};
const extractSync = (opt) => new UnpackSync(opt);
const extract_ = (opt) => new Unpack(opt);
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