Method materialize_view_to

atomic-repository/src/repository/sandbox.rs:205–223

Materialize a view's visible file content into `dir` (created if needed). Writes each visible file's bytes exactly as they appear on `view` (the view's own changes plus its parent chain). Returns the number of files written.

(&self, view: &str, dir: &Path)

    /// view's own changes plus its parent chain). Returns the number of files
    /// written.
    pub fn materialize_view_to(&self, view: &str, dir: &Path) -> Result<usize, RepositoryError> {
        std::fs::create_dir_all(dir)?;

        let mut count = 0usize;
        for path in self.visible_file_paths(view)? {
            let bytes = match self.get_file_content_on_view(&path, view)? {
                Some(bytes) => bytes,
                None => continue,
            };
            let target = dir.join(&path);
            if let Some(parent) = target.parent() {
                std::fs::create_dir_all(parent)?;
            }
            std::fs::write(&target, &bytes)?;
            count += 1;
        }

        Ok(count)
    }

    /// Produce a two-layer OCI image: a base layer (the `base_view`
    /// materialized) plus a thin delta layer (files that differ on `view`