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mol
2024-07-06 22:23:31 +08:00
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The MIT License (MIT)
Copyright (c) 2014 Mathias Buus
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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var chownr = require('chownr')
var tar = require('tar-stream')
var pump = require('pump')
var mkdirp = require('mkdirp-classic')
var fs = require('fs')
var path = require('path')
var os = require('os')
var win32 = os.platform() === 'win32'
var noop = function () {}
var echo = function (name) {
return name
}
var normalize = !win32 ? echo : function (name) {
return name.replace(/\\/g, '/').replace(/[:?<>|]/g, '_')
}
var statAll = function (fs, stat, cwd, ignore, entries, sort) {
var queue = entries || ['.']
return function loop (callback) {
if (!queue.length) return callback()
var next = queue.shift()
var nextAbs = path.join(cwd, next)
stat.call(fs, nextAbs, function (err, stat) {
if (err) return callback(err)
if (!stat.isDirectory()) return callback(null, next, stat)
fs.readdir(nextAbs, function (err, files) {
if (err) return callback(err)
if (sort) files.sort()
for (var i = 0; i < files.length; i++) {
if (!ignore(path.join(cwd, next, files[i]))) queue.push(path.join(next, files[i]))
}
callback(null, next, stat)
})
})
}
}
var strip = function (map, level) {
return function (header) {
header.name = header.name.split('/').slice(level).join('/')
var linkname = header.linkname
if (linkname && (header.type === 'link' || path.isAbsolute(linkname))) {
header.linkname = linkname.split('/').slice(level).join('/')
}
return map(header)
}
}
exports.pack = function (cwd, opts) {
if (!cwd) cwd = '.'
if (!opts) opts = {}
var xfs = opts.fs || fs
var ignore = opts.ignore || opts.filter || noop
var map = opts.map || noop
var mapStream = opts.mapStream || echo
var statNext = statAll(xfs, opts.dereference ? xfs.stat : xfs.lstat, cwd, ignore, opts.entries, opts.sort)
var strict = opts.strict !== false
var umask = typeof opts.umask === 'number' ? ~opts.umask : ~processUmask()
var dmode = typeof opts.dmode === 'number' ? opts.dmode : 0
var fmode = typeof opts.fmode === 'number' ? opts.fmode : 0
var pack = opts.pack || tar.pack()
var finish = opts.finish || noop
if (opts.strip) map = strip(map, opts.strip)
if (opts.readable) {
dmode |= parseInt(555, 8)
fmode |= parseInt(444, 8)
}
if (opts.writable) {
dmode |= parseInt(333, 8)
fmode |= parseInt(222, 8)
}
var onsymlink = function (filename, header) {
xfs.readlink(path.join(cwd, filename), function (err, linkname) {
if (err) return pack.destroy(err)
header.linkname = normalize(linkname)
pack.entry(header, onnextentry)
})
}
var onstat = function (err, filename, stat) {
if (err) return pack.destroy(err)
if (!filename) {
if (opts.finalize !== false) pack.finalize()
return finish(pack)
}
if (stat.isSocket()) return onnextentry() // tar does not support sockets...
var header = {
name: normalize(filename),
mode: (stat.mode | (stat.isDirectory() ? dmode : fmode)) & umask,
mtime: stat.mtime,
size: stat.size,
type: 'file',
uid: stat.uid,
gid: stat.gid
}
if (stat.isDirectory()) {
header.size = 0
header.type = 'directory'
header = map(header) || header
return pack.entry(header, onnextentry)
}
if (stat.isSymbolicLink()) {
header.size = 0
header.type = 'symlink'
header = map(header) || header
return onsymlink(filename, header)
}
// TODO: add fifo etc...
header = map(header) || header
if (!stat.isFile()) {
if (strict) return pack.destroy(new Error('unsupported type for ' + filename))
return onnextentry()
}
var entry = pack.entry(header, onnextentry)
if (!entry) return
var rs = mapStream(xfs.createReadStream(path.join(cwd, filename), { start: 0, end: header.size > 0 ? header.size - 1 : header.size }), header)
rs.on('error', function (err) { // always forward errors on destroy
entry.destroy(err)
})
pump(rs, entry)
}
var onnextentry = function (err) {
if (err) return pack.destroy(err)
statNext(onstat)
}
onnextentry()
return pack
}
var head = function (list) {
return list.length ? list[list.length - 1] : null
}
var processGetuid = function () {
return process.getuid ? process.getuid() : -1
}
var processUmask = function () {
return process.umask ? process.umask() : 0
}
exports.extract = function (cwd, opts) {
if (!cwd) cwd = '.'
if (!opts) opts = {}
var xfs = opts.fs || fs
var ignore = opts.ignore || opts.filter || noop
var map = opts.map || noop
var mapStream = opts.mapStream || echo
var own = opts.chown !== false && !win32 && processGetuid() === 0
var extract = opts.extract || tar.extract()
var stack = []
var now = new Date()
var umask = typeof opts.umask === 'number' ? ~opts.umask : ~processUmask()
var dmode = typeof opts.dmode === 'number' ? opts.dmode : 0
var fmode = typeof opts.fmode === 'number' ? opts.fmode : 0
var strict = opts.strict !== false
if (opts.strip) map = strip(map, opts.strip)
if (opts.readable) {
dmode |= parseInt(555, 8)
fmode |= parseInt(444, 8)
}
if (opts.writable) {
dmode |= parseInt(333, 8)
fmode |= parseInt(222, 8)
}
var utimesParent = function (name, cb) { // we just set the mtime on the parent dir again everytime we write an entry
var top
while ((top = head(stack)) && name.slice(0, top[0].length) !== top[0]) stack.pop()
if (!top) return cb()
xfs.utimes(top[0], now, top[1], cb)
}
var utimes = function (name, header, cb) {
if (opts.utimes === false) return cb()
if (header.type === 'directory') return xfs.utimes(name, now, header.mtime, cb)
if (header.type === 'symlink') return utimesParent(name, cb) // TODO: how to set mtime on link?
xfs.utimes(name, now, header.mtime, function (err) {
if (err) return cb(err)
utimesParent(name, cb)
})
}
var chperm = function (name, header, cb) {
var link = header.type === 'symlink'
/* eslint-disable node/no-deprecated-api */
var chmod = link ? xfs.lchmod : xfs.chmod
var chown = link ? xfs.lchown : xfs.chown
/* eslint-enable node/no-deprecated-api */
if (!chmod) return cb()
var mode = (header.mode | (header.type === 'directory' ? dmode : fmode)) & umask
if (chown && own) chown.call(xfs, name, header.uid, header.gid, onchown)
else onchown(null)
function onchown (err) {
if (err) return cb(err)
if (!chmod) return cb()
chmod.call(xfs, name, mode, cb)
}
}
extract.on('entry', function (header, stream, next) {
header = map(header) || header
header.name = normalize(header.name)
var name = path.join(cwd, path.join('/', header.name))
if (ignore(name, header)) {
stream.resume()
return next()
}
var stat = function (err) {
if (err) return next(err)
utimes(name, header, function (err) {
if (err) return next(err)
if (win32) return next()
chperm(name, header, next)
})
}
var onsymlink = function () {
if (win32) return next() // skip symlinks on win for now before it can be tested
xfs.unlink(name, function () {
xfs.symlink(header.linkname, name, stat)
})
}
var onlink = function () {
if (win32) return next() // skip links on win for now before it can be tested
xfs.unlink(name, function () {
var srcpath = path.join(cwd, path.join('/', header.linkname))
xfs.link(srcpath, name, function (err) {
if (err && err.code === 'EPERM' && opts.hardlinkAsFilesFallback) {
stream = xfs.createReadStream(srcpath)
return onfile()
}
stat(err)
})
})
}
var onfile = function () {
var ws = xfs.createWriteStream(name)
var rs = mapStream(stream, header)
ws.on('error', function (err) { // always forward errors on destroy
rs.destroy(err)
})
pump(rs, ws, function (err) {
if (err) return next(err)
ws.on('close', stat)
})
}
if (header.type === 'directory') {
stack.push([name, header.mtime])
return mkdirfix(name, {
fs: xfs, own: own, uid: header.uid, gid: header.gid
}, stat)
}
var dir = path.dirname(name)
validate(xfs, dir, path.join(cwd, '.'), function (err, valid) {
if (err) return next(err)
if (!valid) return next(new Error(dir + ' is not a valid path'))
mkdirfix(dir, {
fs: xfs, own: own, uid: header.uid, gid: header.gid
}, function (err) {
if (err) return next(err)
switch (header.type) {
case 'file': return onfile()
case 'link': return onlink()
case 'symlink': return onsymlink()
}
if (strict) return next(new Error('unsupported type for ' + name + ' (' + header.type + ')'))
stream.resume()
next()
})
})
})
if (opts.finish) extract.on('finish', opts.finish)
return extract
}
function validate (fs, name, root, cb) {
if (name === root) return cb(null, true)
fs.lstat(name, function (err, st) {
if (err && err.code !== 'ENOENT') return cb(err)
if (err || st.isDirectory()) return validate(fs, path.join(name, '..'), root, cb)
cb(null, false)
})
}
function mkdirfix (name, opts, cb) {
mkdirp(name, { fs: opts.fs }, function (err, made) {
if (!err && made && opts.own) {
chownr(made, opts.uid, opts.gid, cb)
} else {
cb(err)
}
})
}

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{
"name": "tar-fs",
"version": "2.1.1",
"description": "filesystem bindings for tar-stream",
"dependencies": {
"chownr": "^1.1.1",
"mkdirp-classic": "^0.5.2",
"pump": "^3.0.0",
"tar-stream": "^2.1.4"
},
"keywords": [
"tar",
"fs",
"file",
"tarball",
"directory",
"stream"
],
"devDependencies": {
"rimraf": "^2.6.3",
"standard": "^13.0.1",
"tape": "^4.9.2"
},
"scripts": {
"test": "standard && tape test/index.js"
},
"bugs": {
"url": "https://github.com/mafintosh/tar-fs/issues"
},
"homepage": "https://github.com/mafintosh/tar-fs",
"main": "index.js",
"directories": {
"test": "test"
},
"author": "Mathias Buus",
"license": "MIT",
"repository": {
"type": "git",
"url": "https://github.com/mafintosh/tar-fs.git"
}
}