Rust-Analyzer-LSP

基础步骤

1. 安装rust-analyzer

   rustup update
   rustup component add rust-analyzer
   

   命令行输入rust-analyzer --version查看版本号，确认安装成功。

2. 学习一下LSP的基本概念

3. 编写Python程序，定义一个类，专门负责基于LSP与rust-analyzer通信

   import subprocess
   import json
   import re
   import time
   
   class LspClient:
       def __init__(self, server_command):
           self.process = subprocess.Popen(
               server_command,
               stdin=subprocess.PIPE,
               stdout=subprocess.PIPE,
               stderr=subprocess.PIPE,
               text=True
           )
   
       def send_request(self, request):
           """发送 LSP 请求并读取响应"""
           message = self.format_lsp_message(request)
           self.process.stdin.write(message)
           self.process.stdin.flush()
           return self.read_lsp_message()
   
       def format_lsp_message(self, request):
           """将 JSON 请求格式化为 LSP 消息"""
           content = json.dumps(request)
           header = f"Content-Length: {len(content)}\r\n\r\n"
           return header + content
   
       def read_lsp_message(self):
           """从标准输出中读取 LSP 消息"""
           headers = {}
           while True:
               line = self.process.stdout.readline().strip()
               if not line:
                   break
               match = re.match(r"(?P<key>[^:]+):(?P<value>.+)", line)
               if match:
                   headers[match.group("key").lower()] = match.group("value").strip()
   
           content_length = int(headers.get("content-length", 0))
           if not content_length:
               return None
   
           body = self.process.stdout.read(content_length)
           try:
               return json.loads(body)
           except json.JSONDecodeError as e:
               print(f"Error decoding JSON: {e}\n{body}")
               return None
   
       def send_notification(self, notification):
           """发送 LSP 通知（无返回值）"""
           message = self.format_lsp_message(notification)
           self.process.stdin.write(message)
           self.process.stdin.flush()
   
       def terminate(self):
           """终止语言服务器进程"""
           self.process.terminate()
   

4. 开始发请求给rust-analyzer