install.py 文件源码

def _link(src, dst, linktype=LINK_HARD):
    if linktype == LINK_HARD:
        if on_win:
            from ctypes import windll, wintypes
            CreateHardLink = windll.kernel32.CreateHardLinkW
            CreateHardLink.restype = wintypes.BOOL
            CreateHardLink.argtypes = [wintypes.LPCWSTR, wintypes.LPCWSTR,
                                       wintypes.LPVOID]
            if not CreateHardLink(dst, src, None):
                raise OSError('win32 hard link failed')
        else:
            os.link(src, dst)
    elif linktype == LINK_COPY:
        # copy relative symlinks as symlinks
        if islink(src) and not os.readlink(src).startswith(os.path.sep):
            os.symlink(os.readlink(src), dst)
        else:
            shutil.copy2(src, dst)
    else:
        raise Exception("Did not expect linktype=%r" % linktype)