Mace for Visual Studio Code
Official language support for the Mace configuration language.
Features
- Syntax highlighting for Mace declarations, types, values, interpolation, and documentation
- Comment, bracket, quote, and indentation support
- Snippets for imports, outputs, aliases, schemas, and variables
- Diagnostics, completion, hover, definitions, rename, symbols, code actions, and formatting through the Mace language server
- Language-server state in the status bar and dedicated output logs
- Commands for restarting, selecting, inspecting, and clearing the language server
Language server
By default, the extension runs the current workspace source with:
go run ./cmd lsp
This mode requires Go. The extension searches every workspace folder and its ancestors for the github.com/louiss0/mace Go module, so opening the nested vscode-extension-mace repository correctly runs the command from its parent Mace repository. Set mace.server.sourcePath when the source lives elsewhere.
Disable mace.server.developmentMode to download the release in mace-version.json. Release binaries are cached in VS Code's global extension storage and support Linux, macOS, and Windows on x64 and ARM64. Set mace.server.path to use another Mace executable; it must support mace lsp.
Commands
Open the Command Palette and search for Mace:
- Mace: Restart Language Server
- Mace: Show Language Server Output
- Mace: Select Language Server
- Mace: Clear Downloaded Language Servers
The selection command offers the pinned release, a custom executable selected through the system file picker, and workspace development mode. While editing Mace, Ctrl+Alt+M R (Cmd+Alt+M R on macOS) restarts the server.
See Tree-sitter to TextMate parity and VS Code common capabilities for implementation details.
Extension development
Install dependencies and run the tests:
pnpm install
pnpm test
Open this directory in VS Code and use one of the launch configurations:
- Run Mace Extension (local Go server) opens the parent Mace repository and runs
go run ./cmd lsp.
- Run Mace Extension (pinned release) explicitly tests the release in
mace-version.json.
Package a VSIX after all tests pass:
pnpm package
