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lua-lsp

A Language Server for Lua code, written in Lua.

It's still a work in progress, but it's usable for day-to-day. It currently supports:

• Limited autocompletion
• Goto definition
• As you type linting and syntax checking
• Code formatting
• Supports Lua 5.1-5.3 and Luajit

Installation/Usage

lua-lsp can be installed using luarocks:

$ luarocks install --server=http://luarocks.org/dev lua-lsp

This will install the lua-lsp command. Language clients can then communicate with this process using stdio as a transport. See editors.md for more instructions specific to your editor of choice.

Plugins

lua-lsp automatically integrates with common lua packages, when they are installed. For linting, install luacheck:

$ luarocks install luacheck

For code formatting, we currently support Formatter and LCF. Formatter is 5.1 only, whereas lcf is 5.3 only. 5.1:

$ luarocks-5.1 install Formatter
$ luarocks-5.3 install lcf

If you have another package you'd like to see integrated, feel free to leave an issue/PR. Other plugins are always welcome, especially if they provide materially different results.

if lua-cjson is installed, we will optionally use it for a speed boost. It is unfortunately not supported by all versions of lua at the moment, but as soon as it is we will switch to making it mandatory.

$ luarocks install lua-cjson

Configuration

lua-lsp reads a few project-level configuration files to do its work.

To configure linting, we read your standard .luacheckrc file.

For autocomplete support, we reimplement the .luacompleterc format created by atom-autocomplete-lua. In particular, we need luaVersion to properly understand your code.

More LSP-specific configuration flags will hopefully be provided through your editor's configuration support.

TODO

The LSP spec is big, and we don't implement all of it. here's a quick wishlist ordered by roughly by priority/feasibility.

• List references (textDocument/references)
• Find symbols (workspace/symbol)
• Function signature help (textDocument/signatureHelp)
• Code links (textDocument/documentLink)
• File events (workspace/didChangeWatchedFiles)