TSC Language Server

A language server made for the TSC scripting format used in games such as Cave Story. It aims to be small, performant, and completely editor-agnostic. The language server implements the .tscrc.json spec.

Project Overview

The language server is written in the Go programming language and ships as a standalone binary. Language clients can connect to the server through TCP or stdio.

Please note that this language server is currently not 100% stable, so bugs may appear here and there.

Features

• Hover information
• Diagnostics
  • Event duplication checking
  • Command usage validation
  • Message box text overflow checking
• Completions
• Event folding
• Event symbols (outline + go to event)

Getting Started

Language clients should usually install the language server for you automatically, yet you can also install it manually. In this case, you have to keep it up to date yourself, however.

You can download a binary from the GitHub releases page. Checksums are always attached so you can verify the integrity after download. Placing the binary somewhere in your PATH means that language clients will be able to use it without any additional steps.

For Debian users

If you have Debian or a Debian-based system, you can use our Debian package repository to install and update the TSC Language Server globally.

Run the following commands in succession:

echo "deb https://deb.nimblebun.works/debian stable main" | sudo tee /etc/apt/sources.list.d/nimblebun.list
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 033D0D4895F432D1
sudo apt update
sudo apt install tsc-ls

For Arch Linux users

If you have Arch Linux or an Arch-based system (e.g. Manjaro), you can install the TSC Language Server globally through AUR.

Example using yay:

yay -S tsc-ls

Usage

You can start the server in one of two modes:

• Standard I/O mode (by running tsc-ls start)
• TCP mode (by running tsc-ls tcp)

...however, you'd usually want a language client to handle this for you (a plugin or configuration in your IDE/editor).

Editor/IDE Guides

You can view the instructions for getting started with the TSC Language Server in your favorite code editor/IDE in GUIDES.md.

For Language Client Developers

The TSC language server exposes the following LSP-specific JSON-RPC methods:

• textDocument/didOpen - adds the opened document to the language server's file handler
• textDocument/didClose - removes the document from the language server's file handler
• textDocument/didChange - updates the document in the language server's file handler and sends error/warning diagnostics to the client
• textDocument/completion - sends a list of TSC commands that can be used from within the editor's autocompletion feature
• textDocument/documentSymbol - sends a list of TSC events that can be found in the opened file
• textDocument/foldingRange - sends a list of event ranges that can be used for folding
• textDocument/hover - provides hover information for commands and events
• tsc/setConfig - updates the LSP's default configuration with overrides from the workspace's .tscrc.json file
• tsc/resetConfig - reverts to the LSP's built-in (standard) TSC configuration

Additionally, some required methods are also exposed, such as initialize, initialized, shutdown, exit, and $/cancelRequest.

Credits

• Studio Pixel and Nicalis for Cave Story and the TSC scripting format
• The Terraform Language Server for inspiring a big part of this project's structure and inner workings (seriously guys, you did a phenomenal job!)

License

MIT.