tar-fs
v3.0.6
Published
filesystem bindings for tar-stream
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Readme
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.
It doesn't gunzip for you, so if you want to extract a .tar.gz
with this you'll need to use something like gunzip-maybe in addition to this.
const tar = require('tar-fs')
const 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. ignore
is also an alias for filter
. Additionally you get header
if you use ignore while extracting.
That way you could also filter by metadata.
const pack = tar.pack('./my-directory', {
ignore (name) {
return path.extname(name) === '.bin' // ignore .bin files when packing
}
})
const extract = tar.extract('./my-other-directory', {
ignore (name) {
return path.extname(name) === '.bin' // ignore .bin files inside the tarball when extracing
}
})
const extractFilesDirs = tar.extract('./my-other-other-directory', {
ignore (_, header) {
// pass files & directories, ignore e.g. symlinks
return header.type !== 'file' && header.type !== 'directory'
}
})
You can also specify which entries to pack using the entries
option
const pack = tar.pack('./my-directory', {
entries: ['file1', 'subdir/file2'] // only the specific entries will be packed
})
If you want to modify the headers when packing/extracting add a map function to the options
const pack = tar.pack('./my-directory', {
map (header) {
header.name = 'prefixed/'+header.name
return header
}
})
const extract = tar.extract('./my-directory', {
map (header) {
header.name = 'another-prefix/'+header.name
return header
}
})
Similarly you can use mapStream
incase you wanna modify the input/output file streams
const pack = tar.pack('./my-directory', {
mapStream (fileStream, header) {
// NOTE: the returned stream HAS to have the same length as the input stream.
// If not make sure to update the size in the header passed in here.
if (path.extname(header.name) === '.js') {
return fileStream.pipe(someTransform)
}
return fileStream
}
})
const extract = tar.extract('./my-directory', {
mapStream (fileStream, header) {
if (path.extname(header.name) === '.js') {
return fileStream.pipe(someTransform)
}
return fileStream
}
})
Set options.fmode
and options.dmode
to ensure that files/directories extracted have the corresponding modes
const extract = tar.extract('./my-directory', {
dmode: parseInt(555, 8), // all dirs should be readable
fmode: parseInt(444, 8) // all files should be readable
})
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.
Alternatively you can set options.readable
and/or options.writable
to set the dmode and fmode to readable/writable.
var extract = tar.extract('./my-directory', {
readable: true, // all dirs and files should be readable
writable: true, // all dirs and files should be writable
})
Set options.strict
to false
if you want to ignore errors due to unsupported entry types (like device files)
To dereference symlinks (pack the contents of the symlink instead of the link itself) set options.dereference
to true
.
Copy a directory
Copying a directory with permissions and mtime intact is as simple as
tar.pack('source-directory').pipe(tar.extract('dest-directory'))
Interaction with tar-stream
Use finalize: false
and the finish
hook to
leave the pack stream open for further entries (see
tar-stream#pack
),
and use pack
to pass an existing pack stream.
const mypack = tar.pack('./my-directory', {
finalize: false,
finish (sameAsMypack) {
mypack.entry({name: 'generated-file.txt'}, "hello")
tar.pack('./other-directory', {
pack: sameAsMypack
})
}
})
License
MIT