Quilt — VS Code extension

Editor support for Quilt (.quilt) files:

• Syntax highlighting for the Quilt arrow-bracket language (TextMate grammar).
• Arrow-glyph keybindings for typing ← → ↑ ↓ ↖ ↗ ↙ ↘ ↕ ↔ ⟨ ⟩ ⟨T⟩ ⟨N⟩ (see the chords in package.json).
• Language Server (quilt-lsp): quilt syntax diagnostics, and — for the ground language of a .rs.quilt file — full Rust support (hover, go-to-definition, completion, diagnostics) proxied to rust-analyzer.

Setup

Install QuiltLang from the VS Code Marketplace: open the Extensions view (⇧⌘X / Ctrl+Shift+X), search for QuiltLang, and click Install — or run code --install-extension quiltlang.quiltlang. Then reload VS Code.

For diagnostics and Rust support the extension needs the quilt-lsp language server on your PATH. Grab the binary from the latest release, or build it from source:

cargo install --path quilt-lsp   # puts `quilt-lsp` on your PATH

(or point quilt-lsp.serverPath at the binary). rust-analyzer must be available for Rust support (rustup component add rust-analyzer).

Developing the extension

From the repo root, bin/install_tools does everything for a live local build: installs quilt-lsp, runs npm install here, and symlinks this directory into ~/.vscode/extensions. Then reload VS Code.

Settings

• quilt-lsp.serverPath — path to the quilt-lsp binary (default quilt-lsp).
• quilt-lsp.rustAnalyzerPath — override the downstream rust-analyzer command (sets QUILT_LSP_RUST_ANALYZER).
• quilt-lsp.trace.server — off | messages | verbose.

How it works

A .quilt file is one ground-language program with other-language fragments in ↖…↗/↙…↘. The server projects the ground language into a virtual document, opens it to rust-analyzer under the de-quilted URI, and maps positions back and forth. See quilt-lsp for details.