From 770e0d517108f8ef6aac636fa7b85da3e3125568 Mon Sep 17 00:00:00 2001
From: Barrett Ruth <barrettruthtots@gmail.com>
Date: Thu, 5 Jan 2023 12:55:04 -0600
Subject: [PATCH] install: error if plugin installed incorrectly

---
 lua/import-cost.lua | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/lua/import-cost.lua b/lua/import-cost.lua
index 8c7dd6a..19d252d 100644
--- a/lua/import-cost.lua
+++ b/lua/import-cost.lua
@@ -33,13 +33,24 @@ M.config = {
 }
 
 M.setup = function(user_config)
+    M.script_path = vim.fn.fnamemodify(debug.getinfo(1).source:sub(2), ':h:h')
+        .. '/import-cost/index.js'
+
+    if not vim.loop.fs_stat(M.script_path) then
+        vim.notify_once(
+            string.format(
+                'import-cost.nvim: Failed to load script at %s. Ensure the plugin is properly installed.',
+                M.script_path
+            ),
+            vim.log.levels.ERROR
+        )
+        return
+    end
+
     M.config = vim.tbl_deep_extend('force', M.config, user_config or {})
 
     M.ns_id = vim.api.nvim_create_namespace 'ImportCost'
 
-    M.script_path = vim.fn.fnamemodify(debug.getinfo(1).source:sub(2), ':h:h')
-        .. '/import-cost/index.js'
-
     vim.api.nvim_set_hl(
         0,
         'ImportCostVirtualText',