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¯U òhsý­jóÔj#,ímŒRµ«lbïUTŒÑ8†Ä0œÏr`ð¡¬É Ї ë"À² ™ 6¥ f¶ ¢ÚoܱԷ-<Àî)†a¶ž'Ú»¨TXqØæ¶÷YÄHy˜9ÈIW­YÀuMFë ºÏ’AqÌ4·/Ú †ô'i$øä­=Ä Ý|öK×40è|È6p‘0§)o¥ctî§H+CA-“ xØ|ÐXŠç l8íºð3Ø:³¤¬KX¯UÿÙ 'use strict' const { Minipass } = require('minipass') const Pax = require('./pax.js') const Header = require('./header.js') const fs = require('fs') const path = require('path') const normPath = require('./normalize-windows-path.js') const stripSlash = require('./strip-trailing-slashes.js') const prefixPath = (path, prefix) => { if (!prefix) { return normPath(path) } path = normPath(path).replace(/^\.(\/|$)/, '') return stripSlash(prefix) + '/' + path } const maxReadSize = 16 * 1024 * 1024 const PROCESS = Symbol('process') const FILE = Symbol('file') const DIRECTORY = Symbol('directory') const SYMLINK = Symbol('symlink') const HARDLINK = Symbol('hardlink') const HEADER = Symbol('header') const READ = Symbol('read') const LSTAT = Symbol('lstat') const ONLSTAT = Symbol('onlstat') const ONREAD = Symbol('onread') const ONREADLINK = Symbol('onreadlink') const OPENFILE = Symbol('openfile') const ONOPENFILE = Symbol('onopenfile') const CLOSE = Symbol('close') const MODE = Symbol('mode') const AWAITDRAIN = Symbol('awaitDrain') const ONDRAIN = Symbol('ondrain') const PREFIX = Symbol('prefix') const HAD_ERROR = Symbol('hadError') const warner = require('./warn-mixin.js') const winchars = require('./winchars.js') const stripAbsolutePath = require('./strip-absolute-path.js') const modeFix = require('./mode-fix.js') const WriteEntry = warner(class WriteEntry extends Minipass { constructor (p, opt) { opt = opt || {} super(opt) if (typeof p !== 'string') { throw new TypeError('path is required') } this.path = normPath(p) // suppress atime, ctime, uid, gid, uname, gname this.portable = !!opt.portable // until node has builtin pwnam functions, this'll have to do this.myuid = process.getuid && process.getuid() || 0 this.myuser = process.env.USER || '' this.maxReadSize = opt.maxReadSize || maxReadSize this.linkCache = opt.linkCache || new Map() this.statCache = opt.statCache || new Map() this.preservePaths = !!opt.preservePaths this.cwd = normPath(opt.cwd || process.cwd()) this.strict = !!opt.strict this.noPax = !!opt.noPax this.noMtime = !!opt.noMtime this.mtime = opt.mtime || null this.prefix = opt.prefix ? normPath(opt.prefix) : null this.fd = null this.blockLen = null this.blockRemain = null this.buf = null this.offset = null this.length = null this.pos = null this.remain = null if (typeof opt.onwarn === 'function') { this.on('warn', opt.onwarn) } let pathWarn = false if (!this.preservePaths) { const [root, stripped] = stripAbsolutePath(this.path) if (root) { this.path = stripped pathWarn = root } } this.win32 = !!opt.win32 || process.platform === 'win32' if (this.win32) { // force the \ to / normalization, since we might not *actually* // be on windows, but want \ to be considered a path separator. this.path = winchars.decode(this.path.replace(/\\/g, '/')) p = p.replace(/\\/g, '/') } this.absolute = normPath(opt.absolute || path.resolve(this.cwd, p)) if (this.path === '') { this.path = './' } if (pathWarn) { this.warn('TAR_ENTRY_INFO', `stripping ${pathWarn} from absolute path`, { entry: this, path: pathWarn + this.path, }) } if (this.statCache.has(this.absolute)) { this[ONLSTAT](this.statCache.get(this.absolute)) } else { this[LSTAT]() } } emit (ev, ...data) { if (ev === 'error') { this[HAD_ERROR] = true } return super.emit(ev, ...data) } [LSTAT] () { fs.lstat(this.absolute, (er, stat) => { if (er) { return this.emit('error', er) } this[ONLSTAT](stat) }) } [ONLSTAT] (stat) { this.statCache.set(this.absolute, stat) this.stat = stat if (!stat.isFile()) { stat.size = 0 } this.type = getType(stat) this.emit('stat', stat) this[PROCESS]() } [PROCESS] () { switch (this.type) { case 'File': return this[FILE]() case 'Directory': return this[DIRECTORY]() case 'SymbolicLink': return this[SYMLINK]() // unsupported types are ignored. default: return this.end() } } [MODE] (mode) { return modeFix(mode, this.type === 'Directory', this.portable) } [PREFIX] (path) { return prefixPath(path, this.prefix) } [HEADER] () { if (this.type === 'Directory' && this.portable) { this.noMtime = true } this.header = new Header({ path: this[PREFIX](this.path), // only apply the prefix to hard links. linkpath: this.type === 'Link' ? this[PREFIX](this.linkpath) : this.linkpath, // only the permissions and setuid/setgid/sticky bitflags // not the higher-order bits that specify file type mode: this[MODE](this.stat.mode), uid: this.portable ? null : this.stat.uid, gid: this.portable ? null : this.stat.gid, size: this.stat.size, mtime: this.noMtime ? null : this.mtime || this.stat.mtime, type: this.type, uname: this.portable ? null : this.stat.uid === this.myuid ? this.myuser : '', atime: this.portable ? null : this.stat.atime, ctime: this.portable ? null : this.stat.ctime, }) if (this.header.encode() && !this.noPax) { super.write(new Pax({ atime: this.portable ? null : this.header.atime, ctime: this.portable ? null : this.header.ctime, gid: this.portable ? null : this.header.gid, mtime: this.noMtime ? null : this.mtime || this.header.mtime, path: this[PREFIX](this.path), linkpath: this.type === 'Link' ? this[PREFIX](this.linkpath) : this.linkpath, size: this.header.size, uid: this.portable ? null : this.header.uid, uname: this.portable ? null : this.header.uname, dev: this.portable ? null : this.stat.dev, ino: this.portable ? null : this.stat.ino, nlink: this.portable ? null : this.stat.nlink, }).encode()) } super.write(this.header.block) } [DIRECTORY] () { if (this.path.slice(-1) !== '/') { this.path += '/' } this.stat.size = 0 this[HEADER]() this.end() } [SYMLINK] () { fs.readlink(this.absolute, (er, linkpath) => { if (er) { return this.emit('error', er) } this[ONREADLINK](linkpath) }) } [ONREADLINK] (linkpath) { this.linkpath = normPath(linkpath) this[HEADER]() this.end() } [HARDLINK] (linkpath) { this.type = 'Link' this.linkpath = normPath(path.relative(this.cwd, linkpath)) this.stat.size = 0 this[HEADER]() this.end() } [FILE] () { if (this.stat.nlink > 1) { const linkKey = this.stat.dev + ':' + this.stat.ino if (this.linkCache.has(linkKey)) { const linkpath = this.linkCache.get(linkKey) if (linkpath.indexOf(this.cwd) === 0) { return this[HARDLINK](linkpath) } } this.linkCache.set(linkKey, this.absolute) } this[HEADER]() if (this.stat.size === 0) { return this.end() } this[OPENFILE]() } [OPENFILE] () { fs.open(this.absolute, 'r', (er, fd) => { if (er) { return this.emit('error', er) } this[ONOPENFILE](fd) }) } [ONOPENFILE] (fd) { this.fd = fd if (this[HAD_ERROR]) { return this[CLOSE]() } this.blockLen = 512 * Math.ceil(this.stat.size / 512) this.blockRemain = this.blockLen const bufLen = Math.min(this.blockLen, this.maxReadSize) this.buf = Buffer.allocUnsafe(bufLen) this.offset = 0 this.pos = 0 this.remain = this.stat.size this.length = this.buf.length this[READ]() } [READ] () { const { fd, buf, offset, length, pos } = this fs.read(fd, buf, offset, length, pos, (er, bytesRead) => { if (er) { // ignoring the error from close(2) is a bad practice, but at // this point we already have an error, don't need another one return this[CLOSE](() => this.emit('error', er)) } this[ONREAD](bytesRead) }) } [CLOSE] (cb) { fs.close(this.fd, cb) } [ONREAD] (bytesRead) { if (bytesRead <= 0 && this.remain > 0) { const er = new Error('encountered unexpected EOF') er.path = this.absolute er.syscall = 'read' er.code = 'EOF' return this[CLOSE](() => this.emit('error', er)) } if (bytesRead > this.remain) { const er = new Error('did not encounter expected EOF') er.path = this.absolute er.syscall = 'read' er.code = 'EOF' return this[CLOSE](() => this.emit('error', er)) } // null out the rest of the buffer, if we could fit the block padding // at the end of this loop, we've incremented bytesRead and this.remain // to be incremented up to the blockRemain level, as if we had expected // to get a null-padded file, and read it until the end. then we will // decrement both remain and blockRemain by bytesRead, and know that we // reached the expected EOF, without any null buffer to append. if (bytesRead === this.remain) { for (let i = bytesRead; i < this.length && bytesRead < this.blockRemain; i++) { this.buf[i + this.offset] = 0 bytesRead++ this.remain++ } } const writeBuf = this.offset === 0 && bytesRead === this.buf.length ? this.buf : this.buf.slice(this.offset, this.offset + bytesRead) const flushed = this.write(writeBuf) if (!flushed) { this[AWAITDRAIN](() => this[ONDRAIN]()) } else { this[ONDRAIN]() } } [AWAITDRAIN] (cb) { this.once('drain', cb) } write (writeBuf) { if (this.blockRemain < writeBuf.length) { const er = new Error('writing more data than expected') er.path = this.absolute return this.emit('error', er) } this.remain -= writeBuf.length this.blockRemain -= writeBuf.length this.pos += writeBuf.length this.offset += writeBuf.length return super.write(writeBuf) } [ONDRAIN] () { if (!this.remain) { if (this.blockRemain) { super.write(Buffer.alloc(this.blockRemain)) } return this[CLOSE](er => er ? this.emit('error', er) : this.end()) } if (this.offset >= this.length) { // if we only have a smaller bit left to read, alloc a smaller buffer // otherwise, keep it the same length it was before. this.buf = Buffer.allocUnsafe(Math.min(this.blockRemain, this.buf.length)) this.offset = 0 } this.length = this.buf.length - this.offset this[READ]() } }) class WriteEntrySync extends WriteEntry { [LSTAT] () { this[ONLSTAT](fs.lstatSync(this.absolute)) } [SYMLINK] () { this[ONREADLINK](fs.readlinkSync(this.absolute)) } [OPENFILE] () { this[ONOPENFILE](fs.openSync(this.absolute, 'r')) } [READ] () { let threw = true try { const { fd, buf, offset, length, pos } = this const bytesRead = fs.readSync(fd, buf, offset, length, pos) this[ONREAD](bytesRead) threw = false } finally { // ignoring the error from close(2) is a bad practice, but at // this point we already have an error, don't need another one if (threw) { try { this[CLOSE](() => {}) } catch (er) {} } } } [AWAITDRAIN] (cb) { cb() } [CLOSE] (cb) { fs.closeSync(this.fd) cb() } } const WriteEntryTar = warner(class WriteEntryTar extends Minipass { constructor (readEntry, opt) { opt = opt || {} super(opt) this.preservePaths = !!opt.preservePaths this.portable = !!opt.portable this.strict = !!opt.strict this.noPax = !!opt.noPax this.noMtime = !!opt.noMtime this.readEntry = readEntry this.type = readEntry.type if (this.type === 'Directory' && this.portable) { this.noMtime = true } this.prefix = opt.prefix || null this.path = normPath(readEntry.path) this.mode = this[MODE](readEntry.mode) this.uid = this.portable ? null : readEntry.uid this.gid = this.portable ? null : readEntry.gid this.uname = this.portable ? null : readEntry.uname this.gname = this.portable ? null : readEntry.gname this.size = readEntry.size this.mtime = this.noMtime ? null : opt.mtime || readEntry.mtime this.atime = this.portable ? null : readEntry.atime this.ctime = this.portable ? null : readEntry.ctime this.linkpath = normPath(readEntry.linkpath) if (typeof opt.onwarn === 'function') { this.on('warn', opt.onwarn) } let pathWarn = false if (!this.preservePaths) { const [root, stripped] = stripAbsolutePath(this.path) if (root) { this.path = stripped pathWarn = root } } this.remain = readEntry.size this.blockRemain = readEntry.startBlockSize this.header = new Header({ path: this[PREFIX](this.path), linkpath: this.type === 'Link' ? this[PREFIX](this.linkpath) : this.linkpath, // only the permissions and setuid/setgid/sticky bitflags // not the higher-order bits that specify file type mode: this.mode, uid: this.portable ? null : this.uid, gid: this.portable ? null : this.gid, size: this.size, mtime: this.noMtime ? null : this.mtime, type: this.type, uname: this.portable ? null : this.uname, atime: this.portable ? null : this.atime, ctime: this.portable ? null : this.ctime, }) if (pathWarn) { this.warn('TAR_ENTRY_INFO', `stripping ${pathWarn} from absolute path`, { entry: this, path: pathWarn + this.path, }) } if (this.header.encode() && !this.noPax) { super.write(new Pax({ atime: this.portable ? null : this.atime, ctime: this.portable ? null : this.ctime, gid: this.portable ? null : this.gid, mtime: this.noMtime ? null : this.mtime, path: this[PREFIX](this.path), linkpath: this.type === 'Link' ? this[PREFIX](this.linkpath) : this.linkpath, size: this.size, uid: this.portable ? null : this.uid, uname: this.portable ? null : this.uname, dev: this.portable ? null : this.readEntry.dev, ino: this.portable ? null : this.readEntry.ino, nlink: this.portable ? null : this.readEntry.nlink, }).encode()) } super.write(this.header.block) readEntry.pipe(this) } [PREFIX] (path) { return prefixPath(path, this.prefix) } [MODE] (mode) { return modeFix(mode, this.type === 'Directory', this.portable) } write (data) { const writeLen = data.length if (writeLen > this.blockRemain) { throw new Error('writing more to entry than is appropriate') } this.blockRemain -= writeLen return super.write(data) } end () { if (this.blockRemain) { super.write(Buffer.alloc(this.blockRemain)) } return super.end() } }) WriteEntry.Sync = WriteEntrySync WriteEntry.Tar = WriteEntryTar const getType = stat => stat.isFile() ? 'File' : stat.isDirectory() ? 'Directory' : stat.isSymbolicLink() ? 'SymbolicLink' : 'Unsupported' module.exports = WriteEntry