use tempfile::TempDir;

/// A [`gix::Repository`] backed by a temporary directory that is removed on drop. Derefs to
/// `gix::Repository`, so it is used just like one; keeping it alive keeps the scratch dir alive.
pub struct TempRepository {
    repo: gix::Repository,
    // Declared AFTER `repo` so `repo` drops first: any file handles into the scratch dir close
    // before the dir itself is removed (Rust drops struct fields in declaration order).
    _dir: TempDir,
}

impl TempRepository {
    pub fn open(dir: TempDir) -> Result<Self, gix::open::Error> {
        let repo = gix::open(dir.path())?;
        Ok(Self { repo, _dir: dir })
    }

    #[allow(dead_code)]
    pub fn with_object_memory(mut self) -> Self {
        self.repo.objects.enable_object_memory();
        self
    }
}

impl std::ops::Deref for TempRepository {
    type Target = gix::Repository;
    fn deref(&self) -> &gix::Repository {
        &self.repo
    }
}