Function bootstrap::utils::helpers::get_closest_merge_base_commit

pub fn get_closest_merge_base_commit(
    source_dir: Option<&Path>,
    config: &GitConfig<'_>,
    author: &str,
    target_paths: &[PathBuf],
) -> Result<String, String>

Returns the closest commit available from upstream for the given author and target_paths.

If it fails to find the commit from upstream using git merge-base, fallbacks to HEAD.