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use std::{
ffi::CString,
fs::DirBuilder,
io::{self, Read, Result, Write},
os::unix::ffi::OsStrExt,
path::Path,
};
use walkdir::WalkDir;
pub fn pack<W: Write, P: AsRef<Path>, E: AsRef<Path>, I: Iterator<Item = E>>(
archive: W,
source: P,
entries: I,
) -> Result<W> {
let mut ar = tar::Builder::new(archive);
ar.mode(tar::HeaderMode::Deterministic);
ar.follow_symlinks(false);
for entry in entries {
let entry_path = source.as_ref().join(entry);
if !entry_path.exists() {
continue;
}
for dir_entry_result in WalkDir::new(entry_path).sort_by_file_name() {
let dir_entry = dir_entry_result?;
let path = dir_entry.path();
let name = path
.strip_prefix(&source)
.expect("tar: failed to strip path prefix");
ar.append_path_with_name(path, name)?;
}
}
ar.into_inner()
}
pub fn unpack_filter<R: Read, P: AsRef<Path>, F>(archive: R, dest: P, filter: F) -> Result<()>
where
for<'a> F: Fn(&tar::Entry<'a, R>) -> bool,
{
let dest_path = dest.as_ref();
DirBuilder::new().recursive(true).create(dest_path)?;
let mut ar = tar::Archive::new(archive);
ar.set_preserve_permissions(true);
ar.set_preserve_mtime(true);
ar.set_unpack_xattrs(true);
for entry_r in ar.entries()? {
let mut entry = entry_r?;
if !filter(&entry) {
continue;
}
if entry.unpack_in(dest_path)? {
let header = entry.header();
let uid = header.uid()? as libc::uid_t;
let gid = header.gid()? as libc::gid_t;
let path = CString::new(dest_path.join(entry.path()?).as_os_str().as_bytes())
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
if unsafe { libc::lchown(path.as_ptr(), uid, gid) } < 0 {
return Err(io::Error::last_os_error());
}
}
}
Ok(())
}
pub fn unpack<R: Read, P: AsRef<Path>>(archive: R, dest: P) -> Result<()> {
unpack_filter(archive, dest, |_| true)
}
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