cargo_deb/deb/
ar.rs

1use crate::util::compress::Compressed;
2use crate::{CDResult, CargoDebError};
3use ar::{Builder, Header};
4use std::fs;
5use std::fs::File;
6use std::io::BufWriter;
7use std::path::PathBuf;
8
9/// The outermost `ar` archive that contains tarballs inside
10pub struct DebArchive {
11    out_abspath: PathBuf,
12    ar_builder: Builder<BufWriter<File>>,
13    mtime_timestamp: u64,
14}
15
16impl DebArchive {
17    pub fn new(out_abspath: PathBuf, mtime_timestamp: u64) -> CDResult<Self> {
18        let _ = fs::create_dir_all(out_abspath.parent().ok_or("invalid output path")?);
19        let arfile = File::create(&out_abspath)
20            .map_err(|e| CargoDebError::IoFile("can't create file for the archive", e, out_abspath.clone()))?;
21        let ar_builder = Builder::new(BufWriter::new(arfile));
22
23        let mut ar = Self {
24            out_abspath,
25            ar_builder,
26            mtime_timestamp,
27        };
28        ar.add_file("debian-binary".into(), b"2.0\n")?;
29        Ok(ar)
30    }
31
32    pub fn add_control(&mut self, control_tarball: Compressed) -> CDResult<()> {
33        self.add_file(format!("control.tar.{}", control_tarball.extension()), &control_tarball)
34    }
35
36    pub fn add_data(&mut self, data_tarball: Compressed) -> CDResult<()> {
37        self.add_file(format!("data.tar.{}", data_tarball.extension()), &data_tarball)
38    }
39
40    fn add_file(&mut self, dest_path: String, data: &[u8]) -> CDResult<()> {
41        let mut header = Header::new(dest_path.into(), data.len() as u64);
42        header.set_mode(0o100644); // dpkg uses 100644
43        header.set_mtime(self.mtime_timestamp);
44        header.set_uid(0);
45        header.set_gid(0);
46        self.ar_builder.append(&header, data)
47            .map_err(|e| CargoDebError::Io(e).context("can't add ar archive entry"))
48    }
49
50    pub fn finish(self) -> CDResult<PathBuf> {
51        Ok(self.out_abspath)
52    }
53}
cargo_deb/deb/ar.rs

cargo_deb/deb/
ar.rs
