Function build_sparse_files 

pub fn build_sparse_files(
    name: &str,
    file_to_upload: &str,
    dir: &Path,
    max_download_size: u64,
) -> Result<Vec<TempPath>>

Takes the given file_to_upload for the named partition and creates a set of temporary files in the given dir in Sparse Image Format. With the provided max_download_size constraining file size.

Arguments

• name - Name of the partition the image. Used for logs only.
• file_to_upload - Path to the file to translate to sparse image format.
• dir - Path to write the Sparse file(s).
• max_download_size - Maximum size that can be downloaded by the device.