Struct tar::Builder

pub struct Builder<W: Write> {
    // some fields omitted
}

A structure for building archives

This structure has methods for building up an archive from scratch into any arbitrary writer.

Methods

impl<W: Write> Builder<W>

fn new(obj: W) -> Builder<W>

Create a new archive builder with the underlying object as the destination of all data written.

fn into_inner(self) -> Result<W>

Unwrap this archive, returning the underlying object.

This function will finish writing the archive if the finish function hasn't yet been called, returning any I/O error which happens during that operation.

fn append<R: Read>(&mut self, header: &Header, data: R) -> Result<()>

Adds a new entry to this archive.

This function will append the header specified, followed by contents of the stream specified by data. To produce a valid archive the size field of header must be the same as the length of the stream that's being written. Additionally the checksum for the header should have been set via the set_cksum method.

Note that this will not attempt to seek the archive to a valid position, so if the archive is in the middle of a read or some other similar operation then this may corrupt the archive.

Also note that after all entries have been written to an archive the finish function needs to be called to finish writing the archive.

Errors

This function will return an error for any intermittent I/O error which occurs when either reading or writing.

Examples

use tar::{Builder, Header};

let mut header = Header::new_gnu();
header.set_path("foo");
header.set_size(4);
header.set_cksum();

let mut data: &[u8] = &[1, 2, 3, 4];

let mut ar = Builder::new(Vec::new());
ar.append(&header, data).unwrap();
let data = ar.into_inner().unwrap();

fn append_path<P: AsRef<Path>>(&mut self, path: P) -> Result<()>

Adds a file on the local filesystem to this archive.

This function will open the file specified by path and insert the file into the archive with the appropriate metadata set, returning any I/O error which occurs while writing. The path name for the file inside of this archive will be the same as path, and it is required that the path is a relative path.

Note that this will not attempt to seek the archive to a valid position, so if the archive is in the middle of a read or some other similar operation then this may corrupt the archive.

Also note that after all files have been written to an archive the finish function needs to be called to finish writing the archive.

Examples

use tar::Builder;

let mut ar = Builder::new(Vec::new());

ar.append_path("foo/bar.txt").unwrap();

fn append_file<P: AsRef<Path>>(&mut self, path: P, file: &mut File) -> Result<()>

Adds a file to this archive with the given path as the name of the file in the archive.

This will use the metadata of file to populate a Header, and it will then append the file to the archive with the name path.

Note that this will not attempt to seek the archive to a valid position, so if the archive is in the middle of a read or some other similar operation then this may corrupt the archive.

Also note that after all files have been written to an archive the finish function needs to be called to finish writing the archive.

Examples

use std::fs::File;
use tar::Builder;

let mut ar = Builder::new(Vec::new());

// Open the file at one location, but insert it into the archive with a
// different name.
let mut f = File::open("foo/bar/baz.txt").unwrap();
ar.append_file("bar/baz.txt", &mut f).unwrap();

fn append_dir<P, Q>(&mut self, path: P, src_path: Q) -> Result<()> where P: AsRef<Path>, Q: AsRef<Path>

Adds a directory to this archive with the given path as the name of the directory in the archive.

This will use stat to populate a Header, and it will then append the directory to the archive with the name path.

Note that this will not attempt to seek the archive to a valid position, so if the archive is in the middle of a read or some other similar operation then this may corrupt the archive.

Also note that after all files have been written to an archive the finish function needs to be called to finish writing the archive.

Examples

use std::fs;
use tar::Builder;

let mut ar = Builder::new(Vec::new());

// Use the directory at one location, but insert it into the archive
// with a different name.
ar.append_dir("bardir", ".").unwrap();

fn finish(&mut self) -> Result<()>

Finish writing this archive, emitting the termination sections.

This function should only be called when the archive has been written entirely and if an I/O error happens the underlying object still needs to be acquired.

In most situations the into_inner method should be preferred.

Trait Implementations

impl<W: Write> Drop for Builder<W>

fn drop(&mut self)

A method called when the value goes out of scope.