chore(lsp): remove usage of deprecated lsp_installer.on_server_ready()

lua/user/lsp/configs.lua

@@ -0,0 +1,24 @@
+local status_ok, lsp_installer = pcall(require, "nvim-lsp-installer")
+if not status_ok then
+	return
+end
+
+local lspconfig = require("lspconfig")
+
+local servers = { "jsonls", "sumneko_lua" }
+
+lsp_installer.setup {
+	ensure_installed = servers
+}
+
+for _, server in pairs(servers) do
+	local opts = {
+		on_attach = require("user.lsp.handlers").on_attach,
+		capabilities = require("user.lsp.handlers").capabilities,
+	}
+	local has_custom_opts, server_custom_opts = pcall(require, "user.lsp.settings." .. server)
+	if has_custom_opts then
+	 	opts = vim.tbl_deep_extend("force", server_custom_opts, opts)
+	end
+	lspconfig[server].setup(opts)
+end

lua/user/lsp/init.lua

@@ -3,6 +3,6 @@ if not status_ok then
   return
 end
 
-require "user.lsp.lsp-installer"
+require "user.lsp.configs"
 require("user.lsp.handlers").setup()
 require "user.lsp.null-ls"

lua/user/lsp/lsp-installer.lua

@@ -1,28 +0,0 @@
-local status_ok, lsp_installer = pcall(require, "nvim-lsp-installer")
-if not status_ok then
-	return
-end
-
--- Register a handler that will be called for all installed servers.
--- Alternatively, you may also register handlers on specific server instances instead (see example below).
-lsp_installer.on_server_ready(function(server)
-	local opts = {
-		on_attach = require("user.lsp.handlers").on_attach,
-		capabilities = require("user.lsp.handlers").capabilities,
-	}
-
-	 if server.name == "jsonls" then
-	 	local jsonls_opts = require("user.lsp.settings.jsonls")
-	 	opts = vim.tbl_deep_extend("force", jsonls_opts, opts)
-	 end
-
-	 if server.name == "sumneko_lua" then
-	 	local sumneko_opts = require("user.lsp.settings.sumneko_lua")
-	 	opts = vim.tbl_deep_extend("force", sumneko_opts, opts)
-	 end
-
-	-- This setup() function is exactly the same as lspconfig's setup function.
-	-- Refer to https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
-	server:setup(opts)
-end)
-