Function hardlink_or_copy

library/python/fs/__init__.py:232–254

(src, lnk, copy_function=copy2)

@errorfix_win
def hardlink_or_copy(src, lnk, copy_function=copy2):
    def should_fallback_to_copy(exc):
        if WindowsError is not None and isinstance(exc, WindowsError) and exc.winerror == 1142:  # too many hardlinks
            return True
        # cross-device hardlink or too many hardlinks, or some known WSL error
        if isinstance(exc, OSError) and exc.errno in (
            errno.EXDEV,
            errno.EMLINK,
            errno.EINVAL,
            errno.EACCES,
            errno.EPERM,
        ):
            return True
        return False

    try:
        hardlink(src, lnk)
    except Exception as e:
        logger.debug('Failed to hardlink %s to %s with error %s, will copy it', src, lnk, repr(e))
        if should_fallback_to_copy(e):
            copy_function(src, lnk, follow_symlinks=False)
        else:
            raise


# Recursively hardlink directory