front__codeschool-angular-2/node_modules/bower/node_modules/tar-fs

tar-fs

filesystem bindings for tar-stream.

npm install tar-fs

Usage

tar-fs allows you to pack directories into tarballs and extract tarballs into directories.

var tar = require('tar-fs')
var fs = require('fs')

// packing a directory
tar.pack('./my-directory').pipe(fs.createWriteStream('my-tarball.tar'))

// extracting a directory
fs.createReadStream('my-other-tarball.tar').pipe(tar.extract('./my-other-directory'))

To ignore various files when packing or extracting add a ignore function to the options

var pack = tar.pack('./my-directory', {
  ignore: function(name) {
    return path.extname(name) === '.bin' // ignore .bin files when packing
  }
})

var extract = tar.extract('./my-other-directory', {
  ignore: function(name) {
    return path.extname(name) === '.bin' // ignore .bin files inside the tarball when extracing
  }
})

If you want to modify the headers when packing/extracting add a map function to the options

var pack = tar.pack('./my-directory', {
  map: function(header) {
    header.name = 'prefixed/'+header.name
    return header
  }
})

var extract = tar.pack('./my-directory', {
  map: function(header) {
    header.name = 'another-prefix/'+header.name
    return header
  }
})

Similarly you can use mapStream incase you wanna modify the input/output file streams

var pack = tar.pack('./my-directory', {
  mapStream: function(fileStream) {
    return fileStream.pipe(someTransform)
  }
})

var extract = tar.extract('./my-directory', {
  mapStream: function(fileStream) {
    return fileStream.pipe(someTransform)
  }
})

Set options.fmode and options.dmode to ensure that files/directories extracted have the corresponding modes

var extract = tar.extract('./my-directory', {
  dmode: 0555, // all dirs and files should be readable
  fmode: 0444
})

It can be useful to use dmode and fmode if you are packing/unpacking tarballs between *nix/windows to ensure that all files/directories unpacked are readable.

Copy a directory

Copying a directory with permissions and mtime intact is as simple as

tar.pack('source-directory').pipe(tar.extract('dest-directory'))

Performance

Packing and extracting a 6.1 GB with 2496 directories and 2398 files yields the following results on my Macbook Air. See the benchmark here

• tar-fs: 34.261 ms
• node-tar: 366.123 ms (or 10x slower)

License

MIT