stackoverflow_mini_example.py

## Install the viur-cli with:
## pip install viur-cli
import logging
import os

from subprocess import PIPE, Popen
from io import BytesIO
from typing import List


class ViurCommandContext(object):
    def __init__(self, sub_cmd: str, *args) -> None:
        super().__init__()

        self._process: Popen = None
        self._sub_cmd: str = sub_cmd
        self._args: List[str] = args
        self._output: BytesIO = BytesIO()
        self._send_list: List[str] = list()
        self._err = None

        
    @property
    def command(self) -> List[str]:
        cmd = ["viur", self._sub_cmd]
        cmd.extend(self._args)
        return cmd

    def __enter__(self):
        logging.debug(f"Open new sub process with the command {self.command}")
        self._process = Popen(self.command, stdin = PIPE, stdout = PIPE, stderr = PIPE, encoding='utf-8', universal_newlines=True)
        # self._process = Popen(self.command, stdin = PIPE, encoding='utf-8', bufsize=650001)
        return self

    def send_line(self, text: str = '') -> None:
        self._send_list.append(text + os.linesep)
        logging.debug(f"[{self._process.pid}] Append {text} to the queue.")

    def __exit__(self, exc_type, exc_val, exc_tb):
        rep = "".join(self._send_list)
        print(rep.encode("utf-8"))
        
        self._output, self._err = self._process.communicate(rep)
        print(self._output)

if __name__ == "__main__":
  with ViurCommandContext("init") as context:
      context.send_line("y")
      context.send_line("1")
      context.send_line("1")
      context.send_line("project-name")
      context.send_line("abc")
      context.send_line("n")
      context.send_line("n")
      context.send_line("n")