使用 Tarballs
解压缩 一个 tarball
解压缩(GzDecoder
)和提取(Archive::unpack
)当前工作目录中的压缩包archive.tar.gz
的所有文件,并放在同一位置。
extern crate flate2; extern crate tar; use std::fs::File; use flate2::read::GzDecoder; use tar::Archive; fn main() -> Result<(), std::io::Error> { let path = "archive.tar.gz"; let tar_gz = File::open(path)?; let tar = GzDecoder::new(tar_gz); let mut archive = Archive::new(tar); archive.unpack(".")?; Ok(()) }
将目录压缩为一个 tarball
把/var/log
目录压缩,为archive.tar.gz
。
创建一个File
,包进GzEncoder
,在包入tar::Builder
。
- 用
Builder::append_dir_all
递归添加/var/log
目录中的内容,归档到backup/logs
路径下。 GzEncoder
负责在数据写入archive.tar.gz
之前,透明地压缩数据。
extern crate tar; extern crate flate2; use std::fs::File; use flate2::Compression; use flate2::write::GzEncoder; fn main() -> Result<(), std::io::Error> { let tar_gz = File::create("archive.tar.gz")?; let enc = GzEncoder::new(tar_gz, Compression::default()); let mut tar = tar::Builder::new(enc); tar.append_dir_all("backup/logs", "/var/log")?; Ok(()) }
从路径中删除前缀时,解压缩一个 tarball
迭代Archive::entries
。使用Path::strip_prefix
删除指定的路径前缀(bundle/logs
)。最后,通过Entry::unpack
,提取出tar::Entry
- 压缩中的项。
# #[macro_use] # extern crate error_chain; extern crate flate2; extern crate tar; use std::fs::File; use std::path::PathBuf; use flate2::read::GzDecoder; use tar::Archive; # # error_chain! { # foreign_links { # Io(std::io::Error); # StripPrefixError(::std::path::StripPrefixError); # } # } fn main() -> Result<()> { let file = File::open("archive.tar.gz")?; let mut archive = Archive::new(GzDecoder::new(file)); let prefix = "bundle/logs"; println!("Extracted the following files:"); archive .entries()? .filter_map(|e| e.ok()) .map(|mut entry| -> Result<PathBuf> { let path = entry.path()?.strip_prefix(prefix)?.to_owned(); entry.unpack(&path)?; Ok(path) }) .filter_map(|e| e.ok()) .for_each(|x| println!("> {}", x.display())); Ok(()) }