unity-工具-csharp与python交互

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title: unity-工具-csharp与python交互
categories: Unity3d
tags: [unity, 编辑器, 扩展, python]
date: 2020-03-23 15:35:51
comments: false
mathjax: true
toc: true

很多时候写工具都是使用 python 来写, unity 工具需要调用 python 脚本并获取到执行结果.

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使用到的就是 输出流 的获取.

1. csharp 执行 命令行 的方法

   public static string ProcessCommand(string command, string argument) {
       ProcessStartInfo start = new ProcessStartInfo(command);
       start.Arguments = argument;
       start.CreateNoWindow = true;
       start.ErrorDialog = true;
       start.UseShellExecute = false; 
   
       start.RedirectStandardOutput = true;
       start.RedirectStandardError = true;
       start.RedirectStandardInput = true;
       start.StandardOutputEncoding = System.Text.UTF8Encoding.UTF8;
       start.StandardErrorEncoding = System.Text.UTF8Encoding.UTF8;
   
       Process p = Process.Start(start); 
   
       StringBuilder sb1 = new StringBuilder();
       StreamReader reader = p.StandardOutput;
       while (!reader.EndOfStream) {
           string line = reader.ReadLine();
           if (!line.StartsWith("---")) { // 过滤掉自定义的日志, 方便 py 调试
               sb1.Append(line);
           }
           if (!reader.EndOfStream) {
               sb1.Append("\n");
           }
       }
       reader.Close();
   
       StringBuilder sb2 = new StringBuilder();
       StreamReader errorReader = p.StandardError;
       while (!errorReader.EndOfStream) {
           sb2.Append(errorReader.ReadLine()).Append("\n");
       }
       errorReader.Close();
   
       p.WaitForExit();
       p.Close();
   
       if (sb2.Length > 0) {
           throw new Exception(string.Format("--- Error, python error, msg:{0}", sb2.ToString()));
       }
       return sb1.ToString();
   }
   

2. python 工具脚本

   #!/usr/bin/env python
   # -*- coding: utf-8 -*-
   
   import sys
   
   if __name__ == "__main__":
       print("hello world, arg1: {}".format(sys.argv[1])) # 这个就能输出给 csharp
   

3. 测试 csharp 执行 python 结果

   string pyPath = Path.Combine(PackConfig.PyToolDir, "tool.py");
   string res = EditorUtils.ProcessCommand("python3", string.Format("{0} {1}", pyPath, "getProjBranch"));
   Debug.LogFormat("--- py res: {0}", res);
   

   

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