refactor: throw errors in more lua way, i think

lua/gopher/gotests.lua

@@ -12,8 +12,7 @@ local function add_test(args)
     args = args,
     on_exit = function(data, status)
       if not status == 0 then
-        vim.notify("gotests failed: " .. data, vim.log.levels.ERROR)
+        error("gotests failed: " .. data, vim.log.levels.ERROR)
-        return
       end
 
       vim.notify("unit test(s) generated", vim.log.levels.INFO)
@@ -25,7 +24,7 @@ end
 function gotests.func_test()
   local ns = ts_utils.get_func_method_node_at_pos(unpack(vim.api.nvim_win_get_cursor(0)))
   if ns == nil or ns.name == nil then
-    vim.notify("cursor on func/method and execute the command again", vim.log.levels.INFO)
+    vim.notify("cursor on func/method and execute the command again", vim.log.levels.WARN)
     return
   end
 

lua/gopher/iferr.lua

@@ -8,8 +8,7 @@ function iferr.iferr()
 
   local data = vim.fn.systemlist((c.iferr .. " -pos " .. boff), vim.fn.bufnr "%")
   if vim.v.shell_error ~= 0 then
-    vim.notify("iferr failed: " .. data, vim.log.levels.ERROR)
+    error("iferr failed: " .. data, vim.log.levels.ERROR)
-    return
   end
 
   vim.fn.append(pos, data)

lua/gopher/struct_tags.lua

@@ -1,7 +1,6 @@
 local ts_utils = require "gopher._utils.ts"
 local r = require "gopher._utils.runner"
 local c = require("gopher.config").commands
-local u = require "gopher._utils"
 local struct_tags = {}
 
 local function modify(...)
@@ -56,10 +55,9 @@ local function modify(...)
     or tagged["start"] == nil
     or tagged["start"] == 0
   then
-    u.deferred_notify("failed to set tags " .. vim.inspect(tagged), vim.log.levels.ERROR)
+    error("failed to set tags " .. vim.inspec(tagged), vim.log.levels.ERROR)
   end
 
-  -- write goted tags
   vim.api.nvim_buf_set_lines(
     0,
     tagged.start - 1,