feat: Print warning when no providers found

lua/symbols-outline/init.lua

@@ -439,7 +439,12 @@ function M.open_outline(opts)
     opts = { focus_outline = true }
   end
   if not M.view:is_open() then
-    providers.request_symbols(handler, opts)
+    local found = providers.request_symbols(handler, opts)
+    if not found then
+      vim.notify("[symbols-outline]: No providers found for current buffer", vim.log.levels.WARN)
+    -- else
+    --   print("Using provider ".._G._symbols_outline_current_provider.name.."...")
+    end
   end
 end
 

lua/symbols-outline/providers/init.lua

@@ -21,6 +21,7 @@ function M.has_provider()
 end
 
 ---@param on_symbols function
+---@return boolean found_provider
 function M.request_symbols(on_symbols, opts)
   for _, value in ipairs(providers) do
     local provider = require(value)
@@ -28,9 +29,10 @@ function M.request_symbols(on_symbols, opts)
       _G._symbols_outline_current_provider = provider
       _G._symbols_outline_current_provider.name = value
       provider.request_symbols(on_symbols, opts)
-      break
+      return true
     end
   end
+  return false
 end
 
 return M