sumneko_lua.lua

local skeleton = require 'nvim_lsp/skeleton'
local util = require 'nvim_lsp/util'
local vim = vim

local name = "sumneko_lua"

local function make_installer()
	local P = util.path.join
  local install_dir = P{util.base_install_dir, name}
  local git_dir = P{install_dir, "lua-language-server"}

  local bin = P{git_dir, "bin", "Linux", "lua-language-server"}
  local main_file = P{git_dir, "main.lua"}
	local cmd = {bin, '-E', main_file}

	local X = {}
	function X.install()
		local install_info = X.info()
		if install_info.is_installed then
			print(name, "is already installed")
			return
		end
		if not (util.has_bins("ninja") or util.has_bins("curl")) then
			error('Need either "ninja" or "curl" (to download ninja) to install this.')
			return
		end
		if not util.has_bins("sh", "chmod", "unzip") then
			error('Need the binaries "sh", "chmod", "unzip" to install this')
			return
		end
		local script = [=[
set -e
# Install ninja if not available.
which ninja >/dev/null || {
	test -x ninja || {
		curl -LO https://github.com/ninja-build/ninja/releases/download/v1.9.0/ninja-linux.zip
		unzip ninja-linux.zip
		chmod +x ninja
	}
	export PATH=$PWD:$PATH
}

# clone project
git clone https://github.com/sumneko/lua-language-server
cd lua-language-server
git submodule update --init --recursive

# build
cd 3rd/luamake
ninja -f ninja/linux.ninja
cd ../..
./3rd/luamake/luamake rebuild
		]=]
		vim.fn.mkdir(install_info.install_dir, "p")
		util.sh(script, install_info.install_dir)
	end
	function X.info()
		return {
			is_installed = util.has_bins(bin);
			install_dir = install_dir;
			cmd = cmd;
		}
	end
	function X.configure(config)
		local install_info = X.info()
		if install_info.is_installed then
			config.cmd = cmd
		end
	end
	return X
end

local installer = make_installer()

skeleton[name] = {
	default_config = {
		-- cmd = {'/home/ashkan/works/3rd/lua-language-server/run.sh'};
		filetypes = {'lua'};
		root_dir = function(fname)
			return util.find_git_ancestor(fname) or vim.loop.os_homedir()
		end;
		on_new_config = function(config)
			installer.configure(config)
		end;
		log_level = vim.lsp.protocol.MessageType.Warning;
		settings = {};
	};
	docs = {
		vspackage = "https://marketplace.visualstudio.com/_apis/public/gallery/publishers/sumneko/vsextensions/lua/latest/vspackage";
		description = [[
https://github.com/sumneko/lua-language-server

Lua language server. **By default, this doesn't have a `cmd` set.** This is
because it doesn't provide a global binary. We provide an installer for Linux
using `:LspInstall`.  If you wish to install it yourself, [here is a
guide](https://github.com/sumneko/lua-language-server/wiki/Build-and-Run).
]]
	};
}

skeleton[name].install = installer.install
skeleton[name].install_info = installer.info