Function create_archive 

fn create_archive(
    source_dir: &Path,
    output: &Path,
    prefix: &str,
    ignore_set: &GlobSet,
) -> Result<PathBuf>

Walks source_dir respecting .gitignore rules and writes a .tar.gz archive to output, prefixing every entry with prefix. .git and the output file itself are always excluded. Additionally, entries whose path contains a component matched by ignore_set are skipped.