Language Server Protocol types code generator & packages

This repository contains packages and tools to generate code for Language Server Protocol types and classes.

It simplifies the creation of language servers for different programming languages by providing a robust and easy-to-use type generation system.

➡️ For instructions on how to use the code generator, refer to the Usage section.

➡️ For instructions on existing plugins and packages for different languages, refer to the table in the Existing packages/plugins section.

➡️ For instructions on how to create additional plugins to support more languages, refer to the Contributing plugins section.

Code Generator Usage

You will need a Python environment to run the generator. Here are the steps:

Create a Python environment: python -m venv .venv

Note: Python 3.8 is the minimum supported version
Activate the environment: .venv\Scripts\activate (Windows) or source .venv/bin/activate (Linux/macOS)
Install this repo's tool: python -m pip install git+https://github.com/microsoft/lsprotocol.git
Run your plugin. You can use the command line or Nox to run the generator.

Command line

Clone this repository and run generator as a Python module.

For example: python -m generator --plugin dotnet --output-dir ./code

>python -m generator --help
usage: __main__.py [-h] [--model [MODEL [MODEL ...]]] --plugin PLUGIN
                   [--output-dir OUTPUT_DIR]

Generate types from LSP JSON model.

optional arguments:
  -h, --help            show this help message and exit
  --model [MODEL [MODEL ...]], -m [MODEL [MODEL ...]]
                        Path to a model JSON file. By default uses packaged
                        model file.
  --plugin PLUGIN, -p PLUGIN
                        Name of a builtin plugin module. By default uses all
                        plugins.
  --output-dir OUTPUT_DIR, -o OUTPUT_DIR
                        Path to a directory where the generated content is

Using Nox

This project uses Nox as a task runner to run the code generator. You can install Nox and run a build_lsp session to generate code from the spec available in this repo.

> python -m pip install nox
> nox --session build_lsp

You can also use Nox to format code, run tests and run various tasks. Run nox --list to see all available tasks.

Contributing plugins

Adding a new plugin

Follow these steps to generate boilerplate code for a new plugin:

Create a virtual environment for Python using Python >= 3.8 and activate that environment.
1. If you are using the Python extension for VS Code, you can just run the Python: Create Environment command from the Command Palette. Be sure to select all the requirements.txt files in the repo. This command will install all packages needed and select the newly created environment for you.
Ensure nox is installed.
1. Run nox --list in the terminal. If Nox is installed, you should see a list of all available sessions. Otherwise, run python -m pip install nox in the activated environment you created above.
Run nox --session create_plugin and follow the prompts to create a new plugin.

Example:

> nox --session create_plugin
nox > Running session create_plugin
nox > Creating virtual environment (virtualenv) using python.exe in .nox\create_plugin
Enter the name of the plugin: java
nox > Created plugin java.
nox > Session create_plugin was successful.

Existing packages/plugins

Below is the list of plugins already created using this package, with their respective package links.

Language	Plugin Module	Status	Documentation
Python	generator.plugins.python	Active	Python package README
Rust	generator.plugins.rust	Active	Rust package README
Dotnet	generator.plugins.dotnet	Under development