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 <a href="../../index.html">All files</a> / <a href="index.html">tar/lib</a> write-entry.js
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 <div class='fl pad1y space-right2'>
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&nbsp;</td><td class="text"><pre class="prettyprint lang-js">'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')
&nbsp;
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')
&nbsp;
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 &amp;&amp; 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
 this.noMtime = !!opt.noMtime
&nbsp;
 if (typeof opt.onwarn === 'function')
 this.on('warn', opt.onwarn)
&nbsp;
 if (!this.preservePaths &amp;&amp; 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)
 }
&nbsp;
 this.win32 = !!opt.win32 || process.platform === 'win32'
 if (this.win32) {
 this.path = winchars.decode(this.path.replace(/\\/g, '/'))
 p = p.replace(/\\/g, '/')
 }
&nbsp;
 this.absolute = opt.absolute || path.resolve(this.cwd, p)
&nbsp;
 if (this.path === '')
 this.path = './'
&nbsp;
 if (this.statCache.has(this.absolute))
 this[ONLSTAT](this.statCache.get(this.absolute))
 else
 this[LSTAT]()
 }
&nbsp;
 [LSTAT] () {
 fs.lstat(this.absolute, (er, stat) =&gt; {
 if (er)
 return this.emit('error', er)
 this[ONLSTAT](stat)
 })
 }
&nbsp;
 [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]()
 }
&nbsp;
 [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()
 }
 }
&nbsp;
 [HEADER] () {
 if (this.type === 'Directory' &amp;&amp; this.portable)
 this.noMtime = true
&nbsp;
 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 &amp; 0o7777,
 uid: this.portable ? null : this.stat.uid,
 gid: this.portable ? null : this.stat.gid,
 size: this.stat.size,
 mtime: this.noMtime ? 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
 })
&nbsp;
 if (this.header.encode() &amp;&amp; !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.noMtime ? null : 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)
 }
&nbsp;
 [DIRECTORY] () {
 if (this.path.substr(-1) !== '/')
 this.path += '/'
 this.stat.size = 0
 this[HEADER]()
 this.end()
 }
&nbsp;
 [SYMLINK] () {
 fs.readlink(this.absolute, (er, linkpath) =&gt; {
 if (er)
 return this.emit('error', er)
 this[ONREADLINK](linkpath)
 })
 }
&nbsp;
 [ONREADLINK] (linkpath) {
 this.linkpath = linkpath
 this[HEADER]()
 this.end()
 }
&nbsp;
 [HARDLINK] (linkpath) {
 this.type = 'Link'
 this.linkpath = path.relative(this.cwd, linkpath)
 this.stat.size = 0
 this[HEADER]()
 this.end()
 }
&nbsp;
 [FILE] () {
 if (this.stat.nlink &gt; 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)
 }
&nbsp;
 this[HEADER]()
 if (this.stat.size === 0)
 return this.end()
&nbsp;
 this[OPENFILE]()
 }
&nbsp;
 [OPENFILE] () {
 fs.open(this.absolute, 'r', (er, fd) =&gt; {
 if (er)
 return this.emit('error', er)
 this[ONOPENFILE](fd)
 })
 }
&nbsp;
 [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)
 }
&nbsp;
 [READ] (fd, buf, offset, length, pos, remain, blockRemain) {
 fs.read(fd, buf, offset, length, pos, (er, bytesRead) =&gt; {
 if (er)
 return this[CLOSE](fd, _ =&gt; this.emit('error', er))
 this[ONREAD](fd, buf, offset, length, pos, remain, blockRemain, bytesRead)
 })
 }
&nbsp;
 [CLOSE] (fd, cb) {
 fs.close(fd, cb)
 }
&nbsp;
 [ONREAD] (fd, buf, offset, length, pos, remain, blockRemain, bytesRead) {
 if (bytesRead &lt;= 0 &amp;&amp; remain &gt; 0) {
 const er = new Error('unexpected EOF')
 er.path = this.absolute
 er.syscall = 'read'
 er.code = 'EOF'
 this.emit('error', er)
 }
&nbsp;
 // null out the rest of the buffer, if we could fit the block padding
 if (bytesRead === remain) {
 for (let i = bytesRead; i &lt; length &amp;&amp; bytesRead &lt; blockRemain; i++) {
 buf[i + offset] = 0
 bytesRead ++
 remain ++
 }
 }
&nbsp;
 const writeBuf = offset === 0 &amp;&amp; bytesRead === buf.length ?
 buf : buf.slice(offset, offset + bytesRead)
 remain -= bytesRead
 blockRemain -= bytesRead
 pos += bytesRead
 offset += bytesRead
&nbsp;
 this.write(writeBuf)
&nbsp;
 if (!remain) {
 if (blockRemain)
 this.write(Buffer.alloc(blockRemain))
 this.end()
 this[CLOSE](fd, _ =&gt; _)
 return
 }
&nbsp;
 if (offset &gt;= length) {
 buf = Buffer.allocUnsafe(length)
 offset = 0
 }
 length = buf.length - offset
 this[READ](fd, buf, offset, length, pos, remain, blockRemain)
 }
})
&nbsp;
class WriteEntrySync extends WriteEntry {
 constructor (path, opt) {
 super(path, opt)
 }
&nbsp;
 [LSTAT] () {
 this[ONLSTAT](fs.lstatSync(this.absolute))
 }
&nbsp;
 [SYMLINK] () {
 this[ONREADLINK](fs.readlinkSync(this.absolute))
 }
&nbsp;
 [OPENFILE] () {
 this[ONOPENFILE](fs.openSync(this.absolute, 'r'))
 }
&nbsp;
 [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) {}
 }
 }
&nbsp;
 [CLOSE] (fd) {
 fs.closeSync(fd)
 }
}
&nbsp;
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
&nbsp;
 this.readEntry = readEntry
 this.type = readEntry.type
 Iif (this.type === 'Directory' &amp;&amp; this.portable)
 this.noMtime = true
&nbsp;
 this.path = readEntry.path
 this.mode = readEntry.mode
 if (this.mode)
 this.mode = this.mode &amp; 0o7777
 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 : readEntry.mtime
 this.atime = this.portable ? null : readEntry.atime
 this.ctime = this.portable ? null : readEntry.ctime
 this.linkpath = readEntry.linkpath
&nbsp;
 if (typeof opt.onwarn === 'function')
 this.on('warn', opt.onwarn)
&nbsp;
 if (path.isAbsolute(this.path) &amp;&amp; !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)
 }
&nbsp;
 this.remain = readEntry.size
 this.blockRemain = readEntry.startBlockSize
&nbsp;
 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.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
 })
&nbsp;
 if (this.header.encode() &amp;&amp; !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.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())
&nbsp;
 super.write(this.header.block)
 readEntry.pipe(this)
 }
&nbsp;
 write (data) {
 const writeLen = data.length
 if (writeLen &gt; this.blockRemain)
 throw new Error('writing more to entry than is appropriate')
 this.blockRemain -= writeLen
 return super.write(data)
 }
&nbsp;
 end () {
 if (this.blockRemain)
 this.write(Buffer.alloc(this.blockRemain))
 return super.end()
 }
})
&nbsp;
WriteEntry.Sync = WriteEntrySync
WriteEntry.Tar = WriteEntryTar
&nbsp;
const getType = stat =&gt;
 stat.isFile() ? 'File'
 : stat.isDirectory() ? 'Directory'
 : stat.isSymbolicLink() ? 'SymbolicLink'
 : 'Unsupported'
&nbsp;
module.exports = WriteEntry
&nbsp;</pre></td></tr>
</table></pre>
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 Code coverage
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