nix-rust: remove unused tar file code

nix-rust/src/lib.rs

@@ -1,6 +1,5 @@
 mod error;
 mod foreign;
-mod tarfile;
 
 pub use error::Error;
 
@@ -23,10 +22,3 @@ impl<T> CBox<T> {
     }
 }
 
-#[no_mangle]
-pub extern "C" fn unpack_tarfile(
-    source: foreign::Source,
-    dest_dir: &str,
-) -> CBox<Result<(), error::CppException>> {
-    CBox::new(tarfile::unpack_tarfile(source, dest_dir).map_err(|err| err.into()))
-}

nix-rust/src/tarfile.rs

@@ -1,46 +0,0 @@
-use crate::{foreign::Source, Error};
-use std::fs;
-use std::io;
-use std::os::unix::fs::OpenOptionsExt;
-use std::path::Path;
-use tar::Archive;
-
-pub fn unpack_tarfile(source: Source, dest_dir: &str) -> Result<(), Error> {
-    let dest_dir = Path::new(dest_dir);
-
-    let mut tar = Archive::new(source);
-
-    for file in tar.entries()? {
-        let mut file = file?;
-
-        let dest_file = dest_dir.join(file.path()?);
-
-        fs::create_dir_all(dest_file.parent().unwrap())?;
-
-        match file.header().entry_type() {
-            tar::EntryType::Directory => {
-                fs::create_dir(dest_file)?;
-            }
-            tar::EntryType::Regular => {
-                let mode = if file.header().mode()? & (libc::S_IXUSR as u32) == 0 {
-                    0o666
-                } else {
-                    0o777
-                };
-                let mut f = fs::OpenOptions::new()
-                    .create(true)
-                    .write(true)
-                    .mode(mode)
-                    .open(dest_file)?;
-                io::copy(&mut file, &mut f)?;
-            }
-            tar::EntryType::Symlink => {
-                std::os::unix::fs::symlink(file.header().link_name()?.unwrap(), dest_file)?;
-            }
-            tar::EntryType::XGlobalHeader | tar::EntryType::XHeader => {}
-            t => return Err(Error::Misc(format!("unsupported tar entry type '{:?}'", t))),
-        }
-    }
-
-    Ok(())
-}