nvim config stolen from @Lukacms

nvim/lua/lsp/texlab.lua

@@ -0,0 +1,28 @@
+local M = {}
+
+M.setup = function(on_attach, capabilities)
+	require("lspconfig").texlab.setup({
+		capabilities = capabilities,
+		on_attach = on_attach,
+		settings = {
+			texlab = {
+				build = {
+					executable = "tectonic",
+					args = {
+						"%f",
+						"--synctex",
+						"--keep-logs",
+						"--keep-intermediates",
+					},
+				},
+				formatterLineLength = 80,
+				latexFormatter = "latexindent",
+				latexindent = {
+					modifyLineBreaks = true,
+				},
+			},
+		},
+	})
+end
+
+return M