build.py 文件源码

def _find_devenv_path(vs_version):
    devenv_path = None

    # First try the registry, because the environment variable is unreliable
    # (case of Visual Studio installed on a different drive; it still sets
    # the envvar to point to C:\Program Files even if devenv.com is on D:\)
    #pylint: disable=import-error
    from winreg import OpenKey, QueryValue, HKEY_LOCAL_MACHINE
    key_path = 'SOFTWARE\\Classes\\VisualStudio.accessor.' + vs_version + '.0\\shell\\Open'
    try:
        with OpenKey(HKEY_LOCAL_MACHINE, key_path) as key:
            cmdline = QueryValue(key, 'Command')
            if cmdline[:1] == '"':
                cmdline = cmdline.split('"')[1]
            elif ' ' in cmdline:
                cmdline = cmdline.split(' ')[0]
            devenv_path = cmdline.replace('devenv.exe', 'devenv.com')
    #pylint: disable=broad-except
    except Exception:
        pass

    # If the registry key is unhelpful, try the environment variable
    if not devenv_path:
        vstools_path = os.getenv('VS' + vs_version + '0COMNTOOLS')
        if vstools_path is not None:
            # Sanitize this because os.path.join sometimes gets confused
            if vstools_path[-1] in [ '/', '\\' ]:
                vstools_path = vstools_path[:-1]
            devenv_path = os.path.join(vstools_path, '../../Common7/IDE/devenv.com')

    if not devenv_path or not os.path.exists(devenv_path):
        return None

    logging.info("Found Visual Studio at %s", devenv_path)
    return devenv_path