setupext.py 文件源码

def version_from_header(self):
        version = 'unknown'
        ext = self.get_extension()
        if ext is None:
            return version
        # Return the first version found in the include dirs.
        for include_dir in ext.include_dirs:
            header_fname = os.path.join(include_dir, 'freetype.h')
            if os.path.exists(header_fname):
                major, minor, patch = 0, 0, 0
                with open(header_fname, 'r') as fh:
                    for line in fh:
                        if line.startswith('#define FREETYPE_'):
                            value = line.rsplit(' ', 1)[1].strip()
                            if 'MAJOR' in line:
                                major = value
                            elif 'MINOR' in line:
                                minor = value
                            else:
                                patch = value
                return '.'.join([major, minor, patch])