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✏️ Editing: unpack.js

// the PEND/UNPEND stuff tracks whether we're ready to emit end/close yet.
// but the path reservations are required to avoid race conditions where
// parallelized unpack ops may mess with one another, due to dependencies
// (like a Link depending on its target) or destructive operations (like
// clobbering an fs object to create one of a different type.)
import * as fsm from '@isaacs/fs-minipass';
import assert from 'node:assert';
import { randomBytes } from 'node:crypto';
import fs from 'node:fs';
import path from 'node:path';
import { getWriteFlag } from './get-write-flag.js';
import { mkdir, mkdirSync } from './mkdir.js';
import { normalizeUnicode } from './normalize-unicode.js';
import { normalizeWindowsPath } from './normalize-windows-path.js';
import { Parser } from './parse.js';
import { stripAbsolutePath } from './strip-absolute-path.js';
import { stripTrailingSlashes } from './strip-trailing-slashes.js';
import * as wc from './winchars.js';
import { PathReservations } from './path-reservations.js';
const ONENTRY = Symbol('onEntry');
const CHECKFS = Symbol('checkFs');
const CHECKFS2 = Symbol('checkFs2');
const PRUNECACHE = Symbol('pruneCache');
const ISREUSABLE = Symbol('isReusable');
const MAKEFS = Symbol('makeFs');
const FILE = Symbol('file');
const DIRECTORY = Symbol('directory');
const LINK = Symbol('link');
const SYMLINK = Symbol('symlink');
const HARDLINK = Symbol('hardlink');
const UNSUPPORTED = Symbol('unsupported');
const CHECKPATH = Symbol('checkPath');
const MKDIR = Symbol('mkdir');
const ONERROR = Symbol('onError');
const PENDING = Symbol('pending');
const PEND = Symbol('pend');
const UNPEND = Symbol('unpend');
const ENDED = Symbol('ended');
const MAYBECLOSE = Symbol('maybeClose');
const SKIP = Symbol('skip');
const DOCHOWN = Symbol('doChown');
const UID = Symbol('uid');
const GID = Symbol('gid');
const CHECKED_CWD = Symbol('checkedCwd');
const platform = process.env.TESTING_TAR_FAKE_PLATFORM || process.platform;
const isWindows = platform === 'win32';
const DEFAULT_MAX_DEPTH = 1024;
// Unlinks on Windows are not atomic.
//
// This means that if you have a file entry, followed by another
// file entry with an identical name, and you cannot re-use the file
// (because it's a hardlink, or because unlink:true is set, or it's
// Windows, which does not have useful nlink values), then the unlink
// will be committed to the disk AFTER the new file has been written
// over the old one, deleting the new file.
//
// To work around this, on Windows systems, we rename the file and then
// delete the renamed file.  It's a sloppy kludge, but frankly, I do not
// know of a better way to do this, given windows' non-atomic unlink
// semantics.
//
// See: https://github.com/npm/node-tar/issues/183
/* c8 ignore start */
const unlinkFile = (path, cb) => {
    if (!isWindows) {
        return fs.unlink(path, cb);
    }
    const name = path + '.DELETE.' + randomBytes(16).toString('hex');
    fs.rename(path, name, er => {
        if (er) {
            return cb(er);
        }
        fs.unlink(name, cb);
    });
};
/* c8 ignore stop */
/* c8 ignore start */
const unlinkFileSync = (path) => {
    if (!isWindows) {
        return fs.unlinkSync(path);
    }
    const name = path + '.DELETE.' + randomBytes(16).toString('hex');
    fs.renameSync(path, name);
    fs.unlinkSync(name);
};
/* c8 ignore stop */
// this.gid, entry.gid, this.processUid
const uint32 = (a, b, c) => a !== undefined && a === a >>> 0 ? a
    : b !== undefined && b === b >>> 0 ? b
        : c;
// clear the cache if it's a case-insensitive unicode-squashing match.
// we can't know if the current file system is case-sensitive or supports
// unicode fully, so we check for similarity on the maximally compatible
// representation.  Err on the side of pruning, since all it's doing is
// preventing lstats, and it's not the end of the world if we get a false
// positive.
// Note that on windows, we always drop the entire cache whenever a
// symbolic link is encountered, because 8.3 filenames are impossible
// to reason about, and collisions are hazards rather than just failures.
const cacheKeyNormalize = (path) => stripTrailingSlashes(normalizeWindowsPath(normalizeUnicode(path))).toLowerCase();
// remove all cache entries matching ${abs}/**
const pruneCache = (cache, abs) => {
    abs = cacheKeyNormalize(abs);
    for (const path of cache.keys()) {
        const pnorm = cacheKeyNormalize(path);
        if (pnorm === abs || pnorm.indexOf(abs + '/') === 0) {
            cache.delete(path);
        }
    }
};
const dropCache = (cache) => {
    for (const key of cache.keys()) {
        cache.delete(key);
    }
};
export class Unpack extends Parser {
    [ENDED] = false;
    [CHECKED_CWD] = false;
    [PENDING] = 0;
    reservations = new PathReservations();
    transform;
    writable = true;
    readable = false;
    dirCache;
    uid;
    gid;
    setOwner;
    preserveOwner;
    processGid;
    processUid;
    maxDepth;
    forceChown;
    win32;
    newer;
    keep;
    noMtime;
    preservePaths;
    unlink;
    cwd;
    strip;
    processUmask;
    umask;
    dmode;
    fmode;
    chmod;
    constructor(opt = {}) {
        opt.ondone = () => {
            this[ENDED] = true;
            this[MAYBECLOSE]();
        };
        super(opt);
        this.transform = opt.transform;
        this.dirCache = opt.dirCache || new Map();
        this.chmod = !!opt.chmod;
        if (typeof opt.uid === 'number' || typeof opt.gid === 'number') {
            // need both or neither
            if (typeof opt.uid !== 'number' ||
                typeof opt.gid !== 'number') {
                throw new TypeError('cannot set owner without number uid and gid');
            }
            if (opt.preserveOwner) {
                throw new TypeError('cannot preserve owner in archive and also set owner explicitly');
            }
            this.uid = opt.uid;
            this.gid = opt.gid;
            this.setOwner = true;
        }
        else {
            this.uid = undefined;
            this.gid = undefined;
            this.setOwner = false;
        }
        // default true for root
        if (opt.preserveOwner === undefined &&
            typeof opt.uid !== 'number') {
            this.preserveOwner = !!(process.getuid && process.getuid() === 0);
        }
        else {
            this.preserveOwner = !!opt.preserveOwner;
        }
        this.processUid =
            (this.preserveOwner || this.setOwner) && process.getuid ?
                process.getuid()
                : undefined;
        this.processGid =
            (this.preserveOwner || this.setOwner) && process.getgid ?
                process.getgid()
                : undefined;
        // prevent excessively deep nesting of subfolders
        // set to `Infinity` to remove this restriction
        this.maxDepth =
            typeof opt.maxDepth === 'number' ?
                opt.maxDepth
                : DEFAULT_MAX_DEPTH;
        // mostly just for testing, but useful in some cases.
        // Forcibly trigger a chown on every entry, no matter what
        this.forceChown = opt.forceChown === true;
        // turn ><?| in filenames into 0xf000-higher encoded forms
        this.win32 = !!opt.win32 || isWindows;
        // do not unpack over files that are newer than what's in the archive
        this.newer = !!opt.newer;
        // do not unpack over ANY files
        this.keep = !!opt.keep;
        // do not set mtime/atime of extracted entries
        this.noMtime = !!opt.noMtime;
        // allow .., absolute path entries, and unpacking through symlinks
        // without this, warn and skip .., relativize absolutes, and error
        // on symlinks in extraction path
        this.preservePaths = !!opt.preservePaths;
        // unlink files and links before writing. This breaks existing hard
        // links, and removes symlink directories rather than erroring
        this.unlink = !!opt.unlink;
        this.cwd = normalizeWindowsPath(path.resolve(opt.cwd || process.cwd()));
        this.strip = Number(opt.strip) || 0;
        // if we're not chmodding, then we don't need the process umask
        this.processUmask =
            !this.chmod ? 0
                : typeof opt.processUmask === 'number' ? opt.processUmask
                    : process.umask();
        this.umask =
            typeof opt.umask === 'number' ? opt.umask : this.processUmask;
        // default mode for dirs created as parents
        this.dmode = opt.dmode || 0o0777 & ~this.umask;
        this.fmode = opt.fmode || 0o0666 & ~this.umask;
        this.on('entry', entry => this[ONENTRY](entry));
    }
    // a bad or damaged archive is a warning for Parser, but an error
    // when extracting.  Mark those errors as unrecoverable, because
    // the Unpack contract cannot be met.
    warn(code, msg, data = {}) {
        if (code === 'TAR_BAD_ARCHIVE' || code === 'TAR_ABORT') {
            data.recoverable = false;
        }
        return super.warn(code, msg, data);
    }
    [MAYBECLOSE]() {
        if (this[ENDED] && this[PENDING] === 0) {
            this.emit('prefinish');
            this.emit('finish');
            this.emit('end');
        }
    }
    [CHECKPATH](entry) {
        const p = normalizeWindowsPath(entry.path);
        const parts = p.split('/');
        if (this.strip) {
            if (parts.length < this.strip) {
                return false;
            }
            if (entry.type === 'Link') {
                const linkparts = normalizeWindowsPath(String(entry.linkpath)).split('/');
                if (linkparts.length >= this.strip) {
                    entry.linkpath = linkparts.slice(this.strip).join('/');
                }
                else {
                    return false;
                }
            }
            parts.splice(0, this.strip);
            entry.path = parts.join('/');
        }
        if (isFinite(this.maxDepth) && parts.length > this.maxDepth) {
            this.warn('TAR_ENTRY_ERROR', 'path excessively deep', {
                entry,
                path: p,
                depth: parts.length,
                maxDepth: this.maxDepth,
            });
            return false;
        }
        if (!this.preservePaths) {
            if (parts.includes('..') ||
                /* c8 ignore next */
                (isWindows && /^[a-z]:\.\.$/i.test(parts[0] ?? ''))) {
                this.warn('TAR_ENTRY_ERROR', `path contains '..'`, {
                    entry,
                    path: p,
                });
                return false;
            }
            // strip off the root
            const [root, stripped] = stripAbsolutePath(p);
            if (root) {
                entry.path = String(stripped);
                this.warn('TAR_ENTRY_INFO', `stripping ${root} from absolute path`, {
                    entry,
                    path: p,
                });
            }
        }
        if (path.isAbsolute(entry.path)) {
            entry.absolute = normalizeWindowsPath(path.resolve(entry.path));
        }
        else {
            entry.absolute = normalizeWindowsPath(path.resolve(this.cwd, entry.path));
        }
        // if we somehow ended up with a path that escapes the cwd, and we are
        // not in preservePaths mode, then something is fishy!  This should have
        // been prevented above, so ignore this for coverage.
        /* c8 ignore start - defense in depth */
        if (!this.preservePaths &&
            typeof entry.absolute === 'string' &&
            entry.absolute.indexOf(this.cwd + '/') !== 0 &&
            entry.absolute !== this.cwd) {
            this.warn('TAR_ENTRY_ERROR', 'path escaped extraction target', {
                entry,
                path: normalizeWindowsPath(entry.path),
                resolvedPath: entry.absolute,
                cwd: this.cwd,
            });
            return false;
        }
        /* c8 ignore stop */
        // an archive can set properties on the extraction directory, but it
        // may not replace the cwd with a different kind of thing entirely.
        if (entry.absolute === this.cwd &&
            entry.type !== 'Directory' &&
            entry.type !== 'GNUDumpDir') {
            return false;
        }
        // only encode : chars that aren't drive letter indicators
        if (this.win32) {
            const { root: aRoot } = path.win32.parse(String(entry.absolute));
            entry.absolute =
                aRoot + wc.encode(String(entry.absolute).slice(aRoot.length));
            const { root: pRoot } = path.win32.parse(entry.path);
            entry.path = pRoot + wc.encode(entry.path.slice(pRoot.length));
        }
        return true;
    }
    [ONENTRY](entry) {
        if (!this[CHECKPATH](entry)) {
            return entry.resume();
        }
        assert.equal(typeof entry.absolute, 'string');
        switch (entry.type) {
            case 'Directory':
            case 'GNUDumpDir':
                if (entry.mode) {
                    entry.mode = entry.mode | 0o700;
                }
            // eslint-disable-next-line no-fallthrough
            case 'File':
            case 'OldFile':
            case 'ContiguousFile':
            case 'Link':
            case 'SymbolicLink':
                return this[CHECKFS](entry);
            case 'CharacterDevice':
            case 'BlockDevice':
            case 'FIFO':
            default:
                return this[UNSUPPORTED](entry);
        }
    }
    [ONERROR](er, entry) {
        // Cwd has to exist, or else nothing works. That's serious.
        // Other errors are warnings, which raise the error in strict
        // mode, but otherwise continue on.
        if (er.name === 'CwdError') {
            this.emit('error', er);
        }
        else {
            this.warn('TAR_ENTRY_ERROR', er, { entry });
            this[UNPEND]();
            entry.resume();
        }
    }
    [MKDIR](dir, mode, cb) {
        mkdir(normalizeWindowsPath(dir), {
            uid: this.uid,
            gid: this.gid,
            processUid: this.processUid,
            processGid: this.processGid,
            umask: this.processUmask,
            preserve: this.preservePaths,
            unlink: this.unlink,
            cache: this.dirCache,
            cwd: this.cwd,
            mode: mode,
        }, cb);
    }
    [DOCHOWN](entry) {
        // in preserve owner mode, chown if the entry doesn't match process
        // in set owner mode, chown if setting doesn't match process
        return (this.forceChown ||
            (this.preserveOwner &&
                ((typeof entry.uid === 'number' &&
                    entry.uid !== this.processUid) ||
                    (typeof entry.gid === 'number' &&
                        entry.gid !== this.processGid))) ||
            (typeof this.uid === 'number' &&
                this.uid !== this.processUid) ||
            (typeof this.gid === 'number' && this.gid !== this.processGid));
    }
    [UID](entry) {
        return uint32(this.uid, entry.uid, this.processUid);
    }
    [GID](entry) {
        return uint32(this.gid, entry.gid, this.processGid);
    }
    [FILE](entry, fullyDone) {
        const mode = typeof entry.mode === 'number' ?
            entry.mode & 0o7777
            : this.fmode;
        const stream = new fsm.WriteStream(String(entry.absolute), {
            // slight lie, but it can be numeric flags
            flags: getWriteFlag(entry.size),
            mode: mode,
            autoClose: false,
        });
        stream.on('error', (er) => {
            if (stream.fd) {
                fs.close(stream.fd, () => { });
            }
            // flush all the data out so that we aren't left hanging
            // if the error wasn't actually fatal.  otherwise the parse
            // is blocked, and we never proceed.
            stream.write = () => true;
            this[ONERROR](er, entry);
            fullyDone();
        });
        let actions = 1;
        const done = (er) => {
            if (er) {
                /* c8 ignore start - we should always have a fd by now */
                if (stream.fd) {
                    fs.close(stream.fd, () => { });
                }
                /* c8 ignore stop */
                this[ONERROR](er, entry);
                fullyDone();
                return;
            }
            if (--actions === 0) {
                if (stream.fd !== undefined) {
                    fs.close(stream.fd, er => {
                        if (er) {
                            this[ONERROR](er, entry);
                        }
                        else {
                            this[UNPEND]();
                        }
                        fullyDone();
                    });
                }
            }
        };
        stream.on('finish', () => {
            // if futimes fails, try utimes
            // if utimes fails, fail with the original error
            // same for fchown/chown
            const abs = String(entry.absolute);
            const fd = stream.fd;
            if (typeof fd === 'number' && entry.mtime && !this.noMtime) {
                actions++;
                const atime = entry.atime || new Date();
                const mtime = entry.mtime;
                fs.futimes(fd, atime, mtime, er => er ?
                    fs.utimes(abs, atime, mtime, er2 => done(er2 && er))
                    : done());
            }
            if (typeof fd === 'number' && this[DOCHOWN](entry)) {
                actions++;
                const uid = this[UID](entry);
                const gid = this[GID](entry);
                if (typeof uid === 'number' && typeof gid === 'number') {
                    fs.fchown(fd, uid, gid, er => er ?
                        fs.chown(abs, uid, gid, er2 => done(er2 && er))
                        : done());
                }
            }
            done();
        });
        const tx = this.transform ? this.transform(entry) || entry : entry;
        if (tx !== entry) {
            tx.on('error', (er) => {
                this[ONERROR](er, entry);
                fullyDone();
            });
            entry.pipe(tx);
        }
        tx.pipe(stream);
    }
    [DIRECTORY](entry, fullyDone) {
        const mode = typeof entry.mode === 'number' ?
            entry.mode & 0o7777
            : this.dmode;
        this[MKDIR](String(entry.absolute), mode, er => {
            if (er) {
                this[ONERROR](er, entry);
                fullyDone();
                return;
            }
            let actions = 1;
            const done = () => {
                if (--actions === 0) {
                    fullyDone();
                    this[UNPEND]();
                    entry.resume();
                }
            };
            if (entry.mtime && !this.noMtime) {
                actions++;
                fs.utimes(String(entry.absolute), entry.atime || new Date(), entry.mtime, done);
            }
            if (this[DOCHOWN](entry)) {
                actions++;
                fs.chown(String(entry.absolute), Number(this[UID](entry)), Number(this[GID](entry)), done);
            }
            done();
        });
    }
    [UNSUPPORTED](entry) {
        entry.unsupported = true;
        this.warn('TAR_ENTRY_UNSUPPORTED', `unsupported entry type: ${entry.type}`, { entry });
        entry.resume();
    }
    [SYMLINK](entry, done) {
        this[LINK](entry, String(entry.linkpath), 'symlink', done);
    }
    [HARDLINK](entry, done) {
        const linkpath = normalizeWindowsPath(path.resolve(this.cwd, String(entry.linkpath)));
        this[LINK](entry, linkpath, 'link', done);
    }
    [PEND]() {
        this[PENDING]++;
    }
    [UNPEND]() {
        this[PENDING]--;
        this[MAYBECLOSE]();
    }
    [SKIP](entry) {
        this[UNPEND]();
        entry.resume();
    }
    // Check if we can reuse an existing filesystem entry safely and
    // overwrite it, rather than unlinking and recreating
    // Windows doesn't report a useful nlink, so we just never reuse entries
    [ISREUSABLE](entry, st) {
        return (entry.type === 'File' &&
            !this.unlink &&
            st.isFile() &&
            st.nlink <= 1 &&
            !isWindows);
    }
    // check if a thing is there, and if so, try to clobber it
    [CHECKFS](entry) {
        this[PEND]();
        const paths = [entry.path];
        if (entry.linkpath) {
            paths.push(entry.linkpath);
        }
        this.reservations.reserve(paths, done => this[CHECKFS2](entry, done));
    }
    [PRUNECACHE](entry) {
        // if we are not creating a directory, and the path is in the dirCache,
        // then that means we are about to delete the directory we created
        // previously, and it is no longer going to be a directory, and neither
        // is any of its children.
        // If a symbolic link is encountered, all bets are off.  There is no
        // reasonable way to sanitize the cache in such a way we will be able to
        // avoid having filesystem collisions.  If this happens with a non-symlink
        // entry, it'll just fail to unpack, but a symlink to a directory, using an
        // 8.3 shortname or certain unicode attacks, can evade detection and lead
        // to arbitrary writes to anywhere on the system.
        if (entry.type === 'SymbolicLink') {
            dropCache(this.dirCache);
        }
        else if (entry.type !== 'Directory') {
            pruneCache(this.dirCache, String(entry.absolute));
        }
    }
    [CHECKFS2](entry, fullyDone) {
        this[PRUNECACHE](entry);
        const done = (er) => {
            this[PRUNECACHE](entry);
            fullyDone(er);
        };
        const checkCwd = () => {
            this[MKDIR](this.cwd, this.dmode, er => {
                if (er) {
                    this[ONERROR](er, entry);
                    done();
                    return;
                }
                this[CHECKED_CWD] = true;
                start();
            });
        };
        const start = () => {
            if (entry.absolute !== this.cwd) {
                const parent = normalizeWindowsPath(path.dirname(String(entry.absolute)));
                if (parent !== this.cwd) {
                    return this[MKDIR](parent, this.dmode, er => {
                        if (er) {
                            this[ONERROR](er, entry);
                            done();
                            return;
                        }
                        afterMakeParent();
                    });
                }
            }
            afterMakeParent();
        };
        const afterMakeParent = () => {
            fs.lstat(String(entry.absolute), (lstatEr, st) => {
                if (st &&
                    (this.keep ||
                        /* c8 ignore next */
                        (this.newer && st.mtime > (entry.mtime ?? st.mtime)))) {
                    this[SKIP](entry);
                    done();
                    return;
                }
                if (lstatEr || this[ISREUSABLE](entry, st)) {
                    return this[MAKEFS](null, entry, done);
                }
                if (st.isDirectory()) {
                    if (entry.type === 'Directory') {
                        const needChmod = this.chmod &&
                            entry.mode &&
                            (st.mode & 0o7777) !== entry.mode;
                        const afterChmod = (er) => this[MAKEFS](er ?? null, entry, done);
                        if (!needChmod) {
                            return afterChmod();
                        }
                        return fs.chmod(String(entry.absolute), Number(entry.mode), afterChmod);
                    }
                    // Not a dir entry, have to remove it.
                    // NB: the only way to end up with an entry that is the cwd
                    // itself, in such a way that == does not detect, is a
                    // tricky windows absolute path with UNC or 8.3 parts (and
                    // preservePaths:true, or else it will have been stripped).
                    // In that case, the user has opted out of path protections
                    // explicitly, so if they blow away the cwd, c'est la vie.
                    if (entry.absolute !== this.cwd) {
                        return fs.rmdir(String(entry.absolute), (er) => this[MAKEFS](er ?? null, entry, done));
                    }
                }
                // not a dir, and not reusable
                // don't remove if the cwd, we want that error
                if (entry.absolute === this.cwd) {
                    return this[MAKEFS](null, entry, done);
                }
                unlinkFile(String(entry.absolute), er => this[MAKEFS](er ?? null, entry, done));
            });
        };
        if (this[CHECKED_CWD]) {
            start();
        }
        else {
            checkCwd();
        }
    }
    [MAKEFS](er, entry, done) {
        if (er) {
            this[ONERROR](er, entry);
            done();
            return;
        }
        switch (entry.type) {
            case 'File':
            case 'OldFile':
            case 'ContiguousFile':
                return this[FILE](entry, done);
            case 'Link':
                return this[HARDLINK](entry, done);
            case 'SymbolicLink':
                return this[SYMLINK](entry, done);
            case 'Directory':
            case 'GNUDumpDir':
                return this[DIRECTORY](entry, done);
        }
    }
    [LINK](entry, linkpath, link, done) {
        // XXX: get the type ('symlink' or 'junction') for windows
        fs[link](linkpath, String(entry.absolute), er => {
            if (er) {
                this[ONERROR](er, entry);
            }
            else {
                this[UNPEND]();
                entry.resume();
            }
            done();
        });
    }
}
const callSync = (fn) => {
    try {
        return [null, fn()];
    }
    catch (er) {
        return [er, null];
    }
};
export class UnpackSync extends Unpack {
    sync = true;
    [MAKEFS](er, entry) {
        return super[MAKEFS](er, entry, () => { });
    }
    [CHECKFS](entry) {
        this[PRUNECACHE](entry);
        if (!this[CHECKED_CWD]) {
            const er = this[MKDIR](this.cwd, this.dmode);
            if (er) {
                return this[ONERROR](er, entry);
            }
            this[CHECKED_CWD] = true;
        }
        // don't bother to make the parent if the current entry is the cwd,
        // we've already checked it.
        if (entry.absolute !== this.cwd) {
            const parent = normalizeWindowsPath(path.dirname(String(entry.absolute)));
            if (parent !== this.cwd) {
                const mkParent = this[MKDIR](parent, this.dmode);
                if (mkParent) {
                    return this[ONERROR](mkParent, entry);
                }
            }
        }
        const [lstatEr, st] = callSync(() => fs.lstatSync(String(entry.absolute)));
        if (st &&
            (this.keep ||
                /* c8 ignore next */
                (this.newer && st.mtime > (entry.mtime ?? st.mtime)))) {
            return this[SKIP](entry);
        }
        if (lstatEr || this[ISREUSABLE](entry, st)) {
            return this[MAKEFS](null, entry);
        }
        if (st.isDirectory()) {
            if (entry.type === 'Directory') {
                const needChmod = this.chmod &&
                    entry.mode &&
                    (st.mode & 0o7777) !== entry.mode;
                const [er] = needChmod ?
                    callSync(() => {
                        fs.chmodSync(String(entry.absolute), Number(entry.mode));
                    })
                    : [];
                return this[MAKEFS](er, entry);
            }
            // not a dir entry, have to remove it
            const [er] = callSync(() => fs.rmdirSync(String(entry.absolute)));
            this[MAKEFS](er, entry);
        }
        // not a dir, and not reusable.
        // don't remove if it's the cwd, since we want that error.
        const [er] = entry.absolute === this.cwd ?
            []
            : callSync(() => unlinkFileSync(String(entry.absolute)));
        this[MAKEFS](er, entry);
    }
    [FILE](entry, done) {
        const mode = typeof entry.mode === 'number' ?
            entry.mode & 0o7777
            : this.fmode;
        const oner = (er) => {
            let closeError;
            try {
                fs.closeSync(fd);
            }
            catch (e) {
                closeError = e;
            }
            if (er || closeError) {
                this[ONERROR](er || closeError, entry);
            }
            done();
        };
        let fd;
        try {
            fd = fs.openSync(String(entry.absolute), getWriteFlag(entry.size), mode);
        }
        catch (er) {
            return oner(er);
        }
        const tx = this.transform ? this.transform(entry) || entry : entry;
        if (tx !== entry) {
            tx.on('error', (er) => this[ONERROR](er, entry));
            entry.pipe(tx);
        }
        tx.on('data', (chunk) => {
            try {
                fs.writeSync(fd, chunk, 0, chunk.length);
            }
            catch (er) {
                oner(er);
            }
        });
        tx.on('end', () => {
            let er = null;
            // try both, falling futimes back to utimes
            // if either fails, handle the first error
            if (entry.mtime && !this.noMtime) {
                const atime = entry.atime || new Date();
                const mtime = entry.mtime;
                try {
                    fs.futimesSync(fd, atime, mtime);
                }
                catch (futimeser) {
                    try {
                        fs.utimesSync(String(entry.absolute), atime, mtime);
                    }
                    catch (utimeser) {
                        er = futimeser;
                    }
                }
            }
            if (this[DOCHOWN](entry)) {
                const uid = this[UID](entry);
                const gid = this[GID](entry);
                try {
                    fs.fchownSync(fd, Number(uid), Number(gid));
                }
                catch (fchowner) {
                    try {
                        fs.chownSync(String(entry.absolute), Number(uid), Number(gid));
                    }
                    catch (chowner) {
                        er = er || fchowner;
                    }
                }
            }
            oner(er);
        });
    }
    [DIRECTORY](entry, done) {
        const mode = typeof entry.mode === 'number' ?
            entry.mode & 0o7777
            : this.dmode;
        const er = this[MKDIR](String(entry.absolute), mode);
        if (er) {
            this[ONERROR](er, entry);
            done();
            return;
        }
        if (entry.mtime && !this.noMtime) {
            try {
                fs.utimesSync(String(entry.absolute), entry.atime || new Date(), entry.mtime);
                /* c8 ignore next */
            }
            catch (er) { }
        }
        if (this[DOCHOWN](entry)) {
            try {
                fs.chownSync(String(entry.absolute), Number(this[UID](entry)), Number(this[GID](entry)));
            }
            catch (er) { }
        }
        done();
        entry.resume();
    }
    [MKDIR](dir, mode) {
        try {
            return mkdirSync(normalizeWindowsPath(dir), {
                uid: this.uid,
                gid: this.gid,
                processUid: this.processUid,
                processGid: this.processGid,
                umask: this.processUmask,
                preserve: this.preservePaths,
                unlink: this.unlink,
                cache: this.dirCache,
                cwd: this.cwd,
                mode: mode,
            });
        }
        catch (er) {
            return er;
        }
    }
    [LINK](entry, linkpath, link, done) {
        const ls = `${link}Sync`;
        try {
            fs[ls](linkpath, String(entry.absolute));
            done();
            entry.resume();
        }
        catch (er) {
            return this[ONERROR](er, entry);
        }
    }
}
//# sourceMappingURL=unpack.js.map

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