setup.py 文件源码

def intltool_version():
    '''
    Return the version of intltool as a tuple.
    '''
    import subprocess
    if sys.platform == 'win32':
        cmd = ["perl", "-e print qx(intltool-update --version) =~ m/(\d+.\d+.\d+)/;"]
        try:
            ver, ret = subprocess.Popen(cmd ,stdout=subprocess.PIPE,
                stderr=subprocess.PIPE, shell=True).communicate()
            ver = ver.decode("utf-8")
            if ver > "":
                version_str = ver
            else:
                return (0,0,0)
        except:
            return (0,0,0)
    else:
        cmd = 'intltool-update --version 2> /dev/null' # pathological case
        retcode, version_str = subprocess.getstatusoutput(cmd)
        if retcode != 0:
            return None
        cmd = 'intltool-update --version 2> /dev/null | head -1 | cut -d" " -f3'
        retcode, version_str = subprocess.getstatusoutput(cmd)
        if retcode != 0: # unlikely but just barely imaginable, so leave it
            return None
    return tuple([int(num) for num in version_str.split('.')])