qlue-ls 0.3.1

A formatter for SPARQL queries

🦀 Qlue-ls 🦀

⚡Qlue-ls (pronounced "clueless") is a blazingly fast language server for SPARQL, written in Rust 🦀.

[!CAUTION] This Project is still in an early stage.
Only the format capability is production ready.
The rest is experimental.

🚀 Getting Started

📦 Installation

Qlue-ls is available on crate.io:

cargo install qlue-ls

And on PyPi:

pipx install qlue-ls

You can also build it from source:

git clone https://github.com/IoannisNezis/Qlue-ls.git
cd Qlue-ls
cargo build --release --bin qlue-ls

CLI Usage

To run Qlue-ls as formatter run:

qlue-ls format <PATH>

To run Qlue-ls as language server run:

qlue-ls server

This will create a language server listening on stdio.

with Neovim

After you installed the language server, add this to your init.lua:

vim.api.nvim_create_autocmd({ 'FileType' }, {
  desc = 'Connect to Qlue-ls',
  pattern = { 'sparql' },
  callback = function()
    vim.lsp.start {
      name = 'qlue-ls',
      cmd = { 'qlue-ls', 'server' },
      root_dir = vim.fn.getcwd(),
      on_attach = function(client, bufnr)
        vim.keymap.set('n', '<leader>f', vim.lsp.buf.format, { buffer = bufnr, desc = 'LSP: ' .. '[F]ormat' })
      end,
    }
  end,
})

Open a .rq file and check that the buffer is attached to th server:

:checkhealth lsp

Configure keymaps in on_attach function.

🚀 Capabilities

📐 Formatting

Status: Full support

Formats SPARQL queries to ensure consistent and readable syntax. Customizable options to align with preferred query styles are also implemented.

🩺 Diagnostics

Status: Partial support

** provided diagnostics**:

Type	Name	Description
❌ error	undefined prefix	a used prefix is not declared
⚠️ warning	unused prefix	a declared prefix is not used
ℹ️ info	uncompacted uri	a raw uncompacted uri is used

✨ Completion

Status: Partial support

I split auto-completion into 3 stages:

1. Static (Keywords, constructs, ...)
2. Dynamic offline (local defined variables)
3. Dynamic online (with data from a knowledge-graph)

The implementation is in Stage 1.5. Static completion is done, dynamic offline completion is in development.

🛠️ Code Actions

Status: Partial support

name	description	diagnostic
shorten uri	shorten uri into compacted form	uncompacted uri
declare prefix	declares undeclared prefix (if known)	undeclared prefix
shorten all uri's	shorten all uri's into compacted form

⚙️ Configuration

Qlue-ls can be configured through a qlue-ls.toml or qlue-ls.yml file.

Here is the full default configuration

[format]
align_predicates = true
align_prefixes = false
separate_prolouge = false
capitalize_keywords = true
insert_spaces = true
tab_size = 2
where_new_line = false
filter_same_line = true

🌐 use in web

If you want to connect from a web-based-editor, you can use this package as well.
For this purpose this can be compiled to wasm and is available on npm:

npm i qlue-ls

You will have to wrap this in a Web Worker and provide a language server client. There will be more documentation on this in the future...

🙏 Special Thanks

• TJ DeVries for the inspiration and great tutorials
• Chris Biscardi for teaching me Rust
• GordianDziwis for providing a sparql-tree-sitter grammar