Sway

Sway Extension for Zed

Official Zed extension for the Sway programming language, providing comprehensive language support for Fuel smart contracts.

Features

• Language Server Protocol (LSP) integration with forc-lsp
• Syntax highlighting via Tree-sitter grammar
• Code completion and IntelliSense
• Error diagnostics and warnings
• Go to definition and symbol navigation
• Hover documentation and type information
• Inlay hints for types and parameters

Prerequisites

Before using this extension, you need to install the Fuel toolchain:

Installing the Fuel Toolchain

# Install fuelup (Fuel toolchain installer)
curl https://install.fuel.network | sh

# Install the latest Fuel toolchain
fuelup toolchain install latest
fuelup default latest

# Verify installation
fuelup --version  
forc --version  
forc-lsp --version

This will install:

• forc - The Fuel Orchestrator (Sway compiler)
• forc-lsp - The Sway Language Server
• forc-fmt - Sway code formatter
• forc-doc - Sway documentation generator
• fuel-core - The Fuel node implementation
• Other Fuel development tools

Verify Installation

# Verify forc-lsp is available
forc-lsp --version

Installation

From Zed Extension Marketplace

1. Open Zed
2. Press Cmd/Ctrl + Shift + P to open the command palette
3. Type "zed: extensions" and select it
4. Search for "Sway"
5. Click "Install" on the Sway extension

That's it! The extension is automatically available through Zed's built-in extension registry.

Manual Installation (Development Only)

1. Clone this repository:

   git clone https://github.com/FuelLabs/sway-zed-extension.git
   cd sway-zed-extension

2. Install the extension in development mode:

   # In Zed, open the command palette and run:
   # "zed: install dev extension"
   # Then select this extension directory

Usage

Once installed, the extension will automatically activate for .sw files. The language server will start automatically when you open a Sway project.

Supported File Types

• .sw - Sway source files

Project Structure

This extension includes:

• extension.toml - Extension metadata and configuration
• src/lib.rs - WebAssembly extension logic
• languages/sway/config.toml - Language configuration
• languages/sway/highlights.scm - Syntax highlighting rules

Troubleshooting

Language Server Not Starting

If the language server isn't working:

1. Check forc-lsp installation:

   which forc-lsp
   forc-lsp --version

2. Verify PATH: Ensure forc-lsp is in your system PATH

3. Check Zed logs: Open Zed logs to see any error messages:

   • Open command palette (Cmd/Ctrl + Shift + P)
   • Run "zed: open log file"

4. Restart Zed: Sometimes restarting Zed resolves LSP issues

Extension Not Loading

If the extension isn't loading:

1. Check the Zed extensions panel for any error messages
2. Verify the extension is enabled
3. Try disabling and re-enabling the extension
4. Restart Zed

Links

• Sway Documentation
• Fuel Documentation
• Sway GitHub Repository
• Zed Extensions Documentation

License

This project is licensed under the Apache License 2.0. See the LICENSE file for details.