def version_name_error()

in atr/util.py [0:0]

• 14 lines of code
• 7 McCabe index (conditional complexity)

def version_name_error(version_name: str) -> str | None:
    """Check if the given version name is valid."""
    if version_name == "":
        return "Must not be empty"
    if version_name.lower() == "version":
        return "Must not be 'version'"
    if not re.match(r"^[a-zA-Z0-9]", version_name):
        return "Must start with a letter or number"
    if not re.search(r"[a-zA-Z0-9]$", version_name):
        return "Must end with a letter or number"
    if re.search(r"[+.-]{2,}", version_name):
        return "Must not contain multiple consecutive plus, full stop, or hyphen"
    if not re.match(r"^[a-zA-Z0-9+.-]+$", version_name):
        return "Must contain only letters, numbers, plus, full stop, or hyphen"
    return None