diff options
Diffstat (limited to 'deps/npm/node_modules/tar/lib/write-entry.js')
| -rw-r--r-- | deps/npm/node_modules/tar/lib/write-entry.js | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/deps/npm/node_modules/tar/lib/write-entry.js b/deps/npm/node_modules/tar/lib/write-entry.js new file mode 100644 index 0000000000..f562bf138a --- /dev/null +++ b/deps/npm/node_modules/tar/lib/write-entry.js @@ -0,0 +1,395 @@ +'use strict' +const MiniPass = require('minipass') +const Pax = require('./pax.js') +const Header = require('./header.js') +const ReadEntry = require('./read-entry.js') +const fs = require('fs') +const path = require('path') + +const types = require('./types.js') +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 warner = require('./warn-mixin.js') +const winchars = require('./winchars.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 = 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() + 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 = opt.cwd || process.cwd() + this.strict = !!opt.strict + this.noPax = !!opt.noPax + if (typeof opt.onwarn === 'function') + this.on('warn', opt.onwarn) + + if (!this.preservePaths && path.win32.isAbsolute(p)) { + // absolutes on posix are also absolutes on win32 + // so we only need to test this one to get both + const parsed = path.win32.parse(p) + this.warn('stripping ' + parsed.root + ' from absolute path', p) + this.path = p.substr(parsed.root.length) + } + + this.win32 = !!opt.win32 || process.platform === 'win32' + if (this.win32) { + this.path = winchars.decode(this.path.replace(/\\/g, '/')) + p = p.replace(/\\/g, '/') + } + + this.absolute = opt.absolute || path.resolve(this.cwd, p) + + if (this.path === '') + this.path = './' + + if (this.statCache.has(this.absolute)) + this[ONLSTAT](this.statCache.get(this.absolute)) + else + this[LSTAT]() + } + + [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() + } + } + + [HEADER] () { + this.header = new Header({ + path: this.path, + linkpath: this.linkpath, + // only the permissions and setuid/setgid/sticky bitflags + // not the higher-order bits that specify file type + mode: this.stat.mode & 0o7777, + uid: this.portable ? null : this.stat.uid, + gid: this.portable ? null : this.stat.gid, + size: this.stat.size, + mtime: this.type === 'Directory' && this.portable + ? null : 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) + this.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.header.mtime, + path: this.path, + 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()) + this.write(this.header.block) + } + + [DIRECTORY] () { + if (this.path.substr(-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 = linkpath + this[HEADER]() + this.end() + } + + [HARDLINK] (linkpath) { + this.type = 'Link' + this.linkpath = 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) { + const blockLen = 512 * Math.ceil(this.stat.size / 512) + const bufLen = Math.min(blockLen, this.maxReadSize) + const buf = Buffer.allocUnsafe(bufLen) + this[READ](fd, buf, 0, buf.length, 0, this.stat.size, blockLen) + } + + [READ] (fd, buf, offset, length, pos, remain, blockRemain) { + fs.read(fd, buf, offset, length, pos, (er, bytesRead) => { + if (er) + return this[CLOSE](fd, _ => this.emit('error', er)) + this[ONREAD](fd, buf, offset, length, pos, remain, blockRemain, bytesRead) + }) + } + + [CLOSE] (fd, cb) { + fs.close(fd, cb) + } + + [ONREAD] (fd, buf, offset, length, pos, remain, blockRemain, bytesRead) { + if (bytesRead <= 0 && remain > 0) { + const er = new Error('unexpected EOF') + er.path = this.absolute + er.syscall = 'read' + er.code = 'EOF' + this.emit('error', er) + } + + // null out the rest of the buffer, if we could fit the block padding + if (bytesRead === remain) { + for (let i = bytesRead; i < length && bytesRead < blockRemain; i++) { + buf[i + offset] = 0 + bytesRead ++ + remain ++ + } + } + + const writeBuf = offset === 0 && bytesRead === buf.length ? + buf : buf.slice(offset, offset + bytesRead) + remain -= bytesRead + blockRemain -= bytesRead + pos += bytesRead + offset += bytesRead + + this.write(writeBuf) + + if (!remain) { + if (blockRemain) + this.write(Buffer.alloc(blockRemain)) + this.end() + this[CLOSE](fd, _ => _) + return + } + + if (offset >= length) { + buf = Buffer.allocUnsafe(length) + offset = 0 + } + length = buf.length - offset + this[READ](fd, buf, offset, length, pos, remain, blockRemain) + } +}) + +class WriteEntrySync extends WriteEntry { + constructor (path, opt) { + super(path, opt) + } + + [LSTAT] () { + this[ONLSTAT](fs.lstatSync(this.absolute)) + } + + [SYMLINK] () { + this[ONREADLINK](fs.readlinkSync(this.absolute)) + } + + [OPENFILE] () { + this[ONOPENFILE](fs.openSync(this.absolute, 'r')) + } + + [READ] (fd, buf, offset, length, pos, remain, blockRemain) { + let threw = true + try { + const bytesRead = fs.readSync(fd, buf, offset, length, pos) + this[ONREAD](fd, buf, offset, length, pos, remain, blockRemain, bytesRead) + threw = false + } finally { + if (threw) + try { this[CLOSE](fd) } catch (er) {} + } + } + + [CLOSE] (fd) { + fs.closeSync(fd) + } +} + +const WriteEntryTar = warner(class WriteEntryTar extends MiniPass { + constructor (readEntry, opt) { + opt = opt || {} + super(opt) + this.readEntry = readEntry + this.type = readEntry.type + this.path = readEntry.path + this.mode = readEntry.mode + if (this.mode) + this.mode = this.mode & 0o7777 + this.uid = readEntry.uid + this.gid = readEntry.gid + this.uname = readEntry.uname + this.gname = readEntry.gname + this.size = readEntry.size + this.mtime = readEntry.mtime + this.atime = readEntry.atime + this.ctime = readEntry.ctime + this.linkpath = readEntry.linkpath + this.uname = readEntry.uname + this.gname = readEntry.gname + + this.preservePaths = !!opt.preservePaths + this.portable = !!opt.portable + this.strict = !!opt.strict + this.noPax = !!opt.noPax + + if (typeof opt.onwarn === 'function') + this.on('warn', opt.onwarn) + + if (path.isAbsolute(this.path) && !this.preservePaths) { + const parsed = path.parse(this.path) + this.warn( + 'stripping ' + parsed.root + ' from absolute path', + this.path + ) + this.path = this.path.substr(parsed.root.length) + } + + this.remain = readEntry.size + this.blockRemain = readEntry.startBlockSize + + this.header = new Header({ + path: this.path, + 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.mtime, + type: this.type, + uname: this.portable ? null : this.uname, + atime: this.portable ? null : this.atime, + ctime: this.portable ? null : this.ctime + }) + + 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.mtime, + path: this.path, + 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) + } + + 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) + this.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 |