Build and Update Elixir-LS

ElixirLS provides a language server that gives editors information about Elixir Mix projects.

I use nvim-lspconfig to integrate language servers with Neovim's built-in language server client. It makes it easier to launch and initialize language servers.

Keeping ElixirLS Up to Date

I forked and cloned the ElixirLS repo in ~/lsp/elixir-ls.

To keep the fork up to date:

cd ~/lsp/elixir-ls
git switch master
git fetch upstream
git merge upstream/master --ff

Build ElixirLS

To build a new version of the LSP after fetching updates:

cd ~/lsp/elixir-ls
rm -rf /rel
mix deps.get
mix compile
mix elixir_ls.release -o rel

The command mix elixir_ls.release -o <release_dir> comes from the docs. I named my release directory rel. This is the configuration expected in my init.vim setup for nvim-lspconfig. The required language server file will be built at ~/lsp/elixir-ls/rel/language_server.sh.

Automate the Updating and Building

Here is a bash script to automate the process:

 #!/usr/bin/env bash

# Update Elixir-LS
cd ~/lsp/elixir-ls
git switch master
git fetch upstream
git merge upstream/master --ff

# Build updated Elixir-LS
rm -rf /rel
mix deps.get
mix compile
mix elixir_ls.release -o rel