Struct tar::Builder [−][src]
A structure for building archives
This structure has methods for building up an archive from scratch into any arbitrary writer.
Implementations
impl<W: Write> Builder<W>
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pub fn new(obj: W) -> Builder<W>
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Create a new archive builder with the underlying object as the
destination of all data written. The builder will use
HeaderMode::Complete
by default.
pub fn mode(&mut self, mode: HeaderMode)
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Changes the HeaderMode that will be used when reading fs Metadata for
methods that implicitly read metadata for an input Path. Notably, this
does not apply to append(Header)
.
pub fn follow_symlinks(&mut self, follow: bool)
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Follow symlinks, archiving the contents of the file they point to rather than adding a symlink to the archive. Defaults to true.
pub fn get_ref(&self) -> &W
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Gets shared reference to the underlying object.
pub fn get_mut(&mut self) -> &mut W
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Gets mutable reference to the underlying object.
Note that care must be taken while writing to the underlying
object. But, e.g. get_mut().flush()
is claimed to be safe and
useful in the situations when one needs to be ensured that
tar entry was flushed to the disk.
pub fn into_inner(self) -> Result<W>
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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.
pub fn append<R: Read>(&mut self, header: &Header, data: R) -> Result<()>
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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").unwrap(); 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();
pub fn append_data<P: AsRef<Path>, R: Read>(
&mut self,
header: &mut Header,
path: P,
data: R
) -> Result<()>
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&mut self,
header: &mut Header,
path: P,
data: R
) -> Result<()>
Adds a new entry to this archive with the specified path.
This function will set the specified path in the given header, which may
require appending a GNU long-name extension entry to the archive first.
The checksum for the header will be automatically updated via the
set_cksum
method after setting the path. No other metadata in the
header will be modified.
Then it will append the header, 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.
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_size(4); header.set_cksum(); let mut data: &[u8] = &[1, 2, 3, 4]; let mut ar = Builder::new(Vec::new()); ar.append_data(&mut header, "really/long/path/to/foo", data).unwrap(); let data = ar.into_inner().unwrap();
pub fn append_path<P: AsRef<Path>>(&mut self, path: P) -> Result<()>
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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();
pub fn append_path_with_name<P: AsRef<Path>, N: AsRef<Path>>(
&mut self,
path: P,
name: N
) -> Result<()>
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&mut self,
path: P,
name: N
) -> Result<()>
Adds a file on the local filesystem to this archive under another name.
This function will open the file specified by path
and insert the file
into the archive as name
with appropriate metadata set, returning any
I/O error which occurs while writing. The path name for the file inside
of this archive will be name
is required to be 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.
Note if the path
is a directory. This will just add an entry to the archive,
rather than contents of the directory.
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()); // Insert the local file "foo/bar.txt" in the archive but with the name // "bar/foo.txt". ar.append_path_with_name("foo/bar.txt", "bar/foo.txt").unwrap();
pub fn append_file<P: AsRef<Path>>(
&mut self,
path: P,
file: &mut File
) -> Result<()>
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&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();
pub fn append_dir<P, Q>(&mut self, path: P, src_path: Q) -> Result<()> where
P: AsRef<Path>,
Q: AsRef<Path>,
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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.
Note this will not add the contents of the directory to the archive.
See append_dir_all
for recusively adding the contents of the directory.
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();
pub fn append_dir_all<P, Q>(&mut self, path: P, src_path: Q) -> Result<()> where
P: AsRef<Path>,
Q: AsRef<Path>,
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P: AsRef<Path>,
Q: AsRef<Path>,
Adds a directory and all of its contents (recursively) to this archive with the given path as the name of the directory in the archive.
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_all("bardir", ".").unwrap();
pub fn finish(&mut self) -> Result<()>
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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
Auto Trait Implementations
impl<W> RefUnwindSafe for Builder<W> where
W: RefUnwindSafe,
W: RefUnwindSafe,
impl<W> Send for Builder<W> where
W: Send,
W: Send,
impl<W> Sync for Builder<W> where
W: Sync,
W: Sync,
impl<W> Unpin for Builder<W> where
W: Unpin,
W: Unpin,
impl<W> UnwindSafe for Builder<W> where
W: UnwindSafe,
W: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,