如何直接从终端运行 Rust Analyzer

发布于05月27日

我正在try 将Rust Analyzer与基于浏览器的编辑器集成.

我的第一步是直接从终端运行Rust Analyzer，并通过stdio发送请求.

$ rust-analyzer
> Content-Length:207\r\n\r\n{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":null,"rootPath":"/mnt/78b33d24-344b-43da-a40c-8b81a6fd0b34/projects/rustexplorer/quick_test","initializationOptions":{},"capabilities":{}}}

但我有个错误:

[ERROR rust_analyzer] Unexpected error: expected initialize request, got Err(RecvError)
expected initialize request, got Err(RecvError)

我错过了什么？

推荐答案

这只是因为当您直接在终端中输入时，四个文字字符\ r \ n没有转换为两个特殊字符\r和\n.

为了在终端中试验by hand，您应该变换行的结尾.

$ sed -u -re 's/^(.*)$/\1\r/' | rust-analyzer 
Content-Length: 207

{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":null,"rootPath":"/mnt/78b33d24-344b-43da-a40c-8b81a6fd0b34/projects/rustexplorer/quick_test","initializationOptions":{},"capabilities":{}}}

... then the response is displayed here ...

请注意，此处按Enter键；我们不try 输入\n特殊字符.

再想一想，我认为在这种情况下(交互式终端)，您应该提供Content-Length: 209，因为json内容将以\r\n结尾(另外两个字节，作为分隔符忽略).

另一种解决方案是更改终端的设置.

$ stty -icrnl
$ rust-analyser
Content-Length: 208^M <-- Enter + control-J
^M <-- Enter + control-J
{"jsonrpc":"2.0", ... ,"capabilities":{}}} <-- control-J
... the response is displayed here ...