Function resolve_commit_diff_pathspecs 

pub fn resolve_commit_diff_pathspecs(
    repo: &Repository,
    cwd_prefix: Option<&str>,
    raw_paths: &[String],
) -> Result<Vec<String>, ResolveDiffArgumentsError>

Normalize pathspecs for a commit or range diff to repository-relative form.

Unlike working-tree diffs, the paths need not exist in the current checkout (a path deleted on the tip, or exclude magic, is fine), and a bare repository resolves them against the git directory.

Parameters

• repo - repository the paths belong to.
• cwd_prefix - path from the work tree root to the process cwd; None at the root, when unknown, or in a bare repository.
• raw_paths - pathspecs as given.

Errors

Returns ResolveDiffArgumentsError::Pathspec when a pathspec cannot be parsed or lies outside the work tree.