__init__.py 文件源码

def _get_pandoc_version(pandoc_path):
    new_env = os.environ.copy()
    if 'HOME' not in os.environ:
        new_env['HOME'] = tempfile.gettempdir()
    p = subprocess.Popen(
        [pandoc_path, '--version'],
        stdin=subprocess.PIPE,
        stdout=subprocess.PIPE,
        env=new_env)
    comm = p.communicate()
    out_lines = comm[0].decode().splitlines(False)
    if p.returncode != 0 or len(out_lines) == 0:
        raise RuntimeError("Couldn't call pandoc to get version information. Output from "
                           "pandoc:\n%s" % str(comm))

    version_pattern = re.compile(r"^\d+(\.\d+){1,}$")
    for tok in out_lines[0].split():
        if version_pattern.match(tok):
            version = tok
            break
    return version