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src/pxar/decoder.rs: allow to pass match pattern to restore

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In order to partially restore the archive starting from the directory provided as
parameter.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
This commit is contained in:
Christian Ebner
2019-11-05 13:45:04 +01:00
committed by Dietmar Maurer
parent 5e8d600c71
commit 33ad183a40
1 changed files with 8 additions and 5 deletions
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13
src/pxar/decoder.rs
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@ -11,7 +11,8 @@ use failure::*;
use libc;
use super::format_definition::*;
use super::sequential_decoder::*;
use super::sequential_decoder::SequentialDecoder;
use super::match_pattern::MatchPattern;
use proxmox::tools::io::ReadExt;
@ -65,11 +66,13 @@ impl<R: Read + Seek, F: Fn(&Path) -> Result<(), Error>> Decoder<R, F> {
self.root_end
}
pub fn restore(&mut self, dir: &DirectoryEntry, path: &Path) -> Result<(), Error> {
/// Restore the subarchive starting at `dir` to the provided target `path`.
///
/// Only restore the content matched by the MatchPattern `pattern`.
/// An empty Vec `pattern` means restore all.
pub fn restore(&mut self, dir: &DirectoryEntry, path: &Path, pattern: &Vec<MatchPattern>) -> Result<(), Error> {
let start = dir.start;
self.seek(SeekFrom::Start(start))?;
// Except for the root dir, `DirectoryEntry` start points to the filename.
// But `SequentialDecoder::restore()` expects the entry point to be of
// type `PxarEntry`, so lets skip over the filename here if present.
@ -80,7 +83,7 @@ impl<R: Read + Seek, F: Fn(&Path) -> Result<(), Error>> Decoder<R, F> {
}
let _filename = self.inner.read_filename(header.size)?;
}
self.inner.restore(path, &Vec::new())?;
self.inner.restore(path, pattern)?;
Ok(())
}