Help for release.changes

def changes(*, files=None, staged=False, context=3, max_bytes=200_000, clip=False):
    """
    Returns a unified diff of all recent textual changes in the git repo.

    - Shows added/removed lines (ignores binary files).
    - Includes unstaged (working directory) by default. Use staged=True to see only staged.
    - 'files': Optionally filter by path(s) or file glob(s).
    - 'context': Number of context lines in the diff (default 3).
    - 'max_bytes': Truncate diff if too large (default 200,000).
    """
    import subprocess

    cmd = ["git", "diff", "--unified=%d" % context]
    if staged:
        cmd.insert(2, "--staged")
    if files:
        if isinstance(files, str):
            files = [files]
        cmd += list(files)

    try:
        diff = subprocess.check_output(cmd, encoding="utf-8", errors="replace")
    except subprocess.CalledProcessError as e:
        return f"[ERROR] Unable to get git diff: {e}"
    except FileNotFoundError:
        return "[ERROR] git command not found. Are you in a git repo?"

    # Remove any diff blocks for binary files
    filtered = []
    skip = False
    for line in diff.splitlines(keepends=True):
        # Exclude blocks marking a binary difference
        if line.startswith("Binary files "):
            continue
        if line.startswith("diff --git"):
            skip = False  # new file block
        if "GIT binary patch" in line:
            skip = True
        if skip:
            continue
        filtered.append(line)

    result = "".join(filtered)
    if len(result) > max_bytes:
        return result[:max_bytes] + "\n[...Diff truncated at %d bytes...]" % max_bytes
    
    if clip: 
        gw.clip.copy(result)
    if not gw.silent:
        return result or "[No changes detected]"