HQLint - HQL Language Server & VS Code Extension

HQLint is a high-performance Language Server for Hive Query Language (HQL), written in Rust. It provides real-time linting, formatting, and autocompletion for HQL scripts.

This repository contains:

• crates/hql-ls: The core HQL Language Server (LSP) implementation in Rust.
• editors/code: The Visual Studio Code extension client.
• notepad++: Syntax highlighting support for Notepad++.

Features

• 🚀 Fast: Powered by a Rust-based Language Server (sqlparser-rs).
• 🔍 Linting:
  • Syntax validation.
  • Keyword casing (e.g., SELECT vs select).
  • Missing semicolons (statement termination).
  • Unbalanced parentheses.
  • Hive variable syntax (${hiveconf:var}).
  • Missing commas in SELECT lists (heuristic).
• ✨ Formatting: Automatic code formatting using sqlformat.
• 💡 Autocomplete: Context-aware completion for keywords and snippets.
• 📝 Editor Support:
  • VS Code: Full feature set.
  • Notepad++: Syntax highlighting (via UDL) + Linting (via LSP plugin).
  • Other Editors: Any LSP-compliant editor (Neovim, Emacs, Helix) can use the hql-ls binary.

Building from Source

Prerequisites

• Rust (latest stable)
• Node.js & npm

Build Steps

1. Build the Language Server:

   cargo build --release

   The binary will be at target/release/hql-ls.

2. Build the VS Code Extension:

   cd editors/code
   npm install
   
   # Copy the binary to the extension folder (required for bundling)
   mkdir -p server
   cp ../../target/release/hql-ls server/
   
   # Package into VSIX
   npx @vscode/vsce package

Notepad++ Support

1. Import notepad++/HQL_UDL.xml via Language > User Defined Language > Define your language... > Import.
2. For linting support, configure the NppLSP plugin to use the built hql-ls binary.

License

This project is licensed under the Apache License 2.0.