LSP Example

Heavily documented sample code for https://code.visualstudio.com/api/language-extensions/language-server-extension-guide

Functionality

This Language Server works for plain text file. It has the following language features:

• Completions
• Diagnostics regenerated on each file change or configuration change

It also includes an End-to-End test.

Structure

.
├── client // Language Client
│   ├── src
│   │   ├── test // End to End tests for Language Client / Server
│   │   └── extension.ts // Language Client entry point
├── package.json // The extension manifest.
└── server // Language Server
    └── src
        └── server.ts // Language Server entry point

Running the Sample

• Run npm install in this folder. This installs all necessary npm modules in both the client and server folder
• Open VS Code on this folder.
• Press Ctrl+Shift+B to compile the client and server.
• Switch to the Debug viewlet.
• Select Launch Client from the drop down.
• Run the launch config.
• If you want to debug the server as well use the launch configuration Attach to Server
• In the [Extension Development Host] instance of VSCode, open a document in 'plain text' language mode.
  • Type j or t to see Javascript and TypeScript completion.
  • Enter text content such as AAA aaa BBB. The extension will emit diagnostics for all words in all-uppercase.