fix refactor pt 6

lua/custom/utils.lua

@@ -1,20 +1,21 @@
-return {
-  pick_executable = function(start_dir)
 local function is_executable(path)
-      return vim.fn.filereadable(path) == 1 and vim.fn.executable(path) == 1
+  -- Use `file` command to identify Mach-O or ELF binaries
+  local output = vim.fn.system { 'file', '-b', path }
+  return output:match 'Mach%-O' or output:match 'ELF'
 end
 
 local function collect_executables(dir)
   local files = vim.fn.globpath(dir, '**', true, true)
   local binaries = {}
   for _, path in ipairs(files) do
-        if is_executable(path) then
+    if vim.fn.filereadable(path) == 1 and is_executable(path) then
       table.insert(binaries, path)
     end
   end
   return binaries
 end
 
+local function pick_executable(start_dir)
   local co = coroutine.running()
   if not co then
     error 'pick_executable must be called from a coroutine'
@@ -45,5 +46,8 @@ return {
     :find()
 
   return coroutine.yield()
-  end,
+end
+
+return {
+  pick_executable = pick_executable,
 }