move prerequisites check to enable function

lua/lazyvim/plugins/extras/editor/medias.lua

@@ -1,3 +1,23 @@
+local findCmd = ""
+-- Use the simple Set that implemented by a table to avoid duplicates; it only contains the methods add and toList
+local supportedFiletypeSet = { _data = {} }
+
+function supportedFiletypeSet:add(values)
+  if type(values) == "string" then
+    values = { values }
+  end
+
+  for _, value in ipairs(values) do
+    if not self._data[value] then
+      self._data[value] = 1
+    end
+  end
+end
+
+function supportedFiletypeSet:toList()
+  return vim.tbl_keys(self._data)
+end
+
 return {
   {
     "nvim-telescope/telescope.nvim",
@@ -5,12 +25,19 @@ return {
       {
         "nvim-telescope/telescope-media-files.nvim",
         event = "VeryLazy",
-        config = function(_, opts)
+        enabled = function()
           if not LazyVim.has("telescope.nvim") then
-            return
+            return false
           end
 
-          -- https://github.com/nvim-telescope/telescope-media-files.nvim?tab=readme-ov-file#prerequisites
+          local function sendPrerequisitesError(msg)
+            LazyVim.warn(
+              "You have enabled extras.editor.medias, see (:`LazyExtras`). \n\n"
+                .. msg
+                .. "\n\nMore information can be found at: "
+                .. "[nvim-telescope/telescope-media-files.nvim](https://github.com/nvim-telescope/telescope-media-files.nvim?tab=readme-ov-file#prerequisites)."
+            )
+          end
           local prerequisites = {
             required = {
               { cmd = "chafa", name = "Chafa", filetypes = { "png", "jpg", "jpeg", "webp" } },
@@ -28,28 +55,18 @@ return {
               { cmd = "fontpreview", name = "fontpreview", filetypes = { "ttf", "otf" } },
             },
           }
-          local function sendPrerequisitesError(msg)
-            LazyVim.error(
-              msg
-                .. "\nMore information can be found at: "
-                .. "https://github.com/nvim-telescope/telescope-media-files.nvim?tab=readme-ov-file#prerequisites"
-            )
-          end
-
-          local supportedFiletypes = {}
 
           -- Ensure all required prerequisites are installed
           for _, tool in ipairs(prerequisites.required) do
             if vim.fn.executable(tool.cmd) == 0 then
-              sendPrerequisitesError("Required prerequisite not installed: " .. tool.name)
+              sendPrerequisitesError(string.format("The required prerequisite not installed: `%s`", tool.name))
-              return
+              return false
             else
-              supportedFiletypes = vim.tbl_extend("force", supportedFiletypes, tool.filetypes)
+              supportedFiletypeSet:add(tool.filetypes)
             end
           end
 
           -- Verify that at least one of the required find commands is installed
-          local findCmd = ""
           for _, tool in ipairs(prerequisites.findCmd) do
             if vim.fn.executable(tool.cmd) == 1 then
               findCmd = tool.cmd
@@ -62,22 +79,24 @@ return {
               "None of the required 'find cmd' prerequisites is installed.\n"
                 .. "Please install at least one of the following: `rd`, `rg`, or `find`."
             )
-            return
+            return false
           end
 
           -- Check optional prerequisites and include their filetypes if installed
           for _, tool in ipairs(prerequisites.optional) do
             if vim.fn.executable(tool.cmd) == 1 then
-              supportedFiletypes = vim.tbl_extend("force", supportedFiletypes, tool.filetypes)
+              supportedFiletypeSet:add(tool.filetypes)
             end
           end
 
-          -- Setup media_files extension for telescope
+          return true
+        end,
+        config = function(_, opts)
           LazyVim.on_load("telescope.nvim", function()
             local ok, err = pcall(require("telescope").load_extension, "media_files")
             if ok then
               opts.extensions = vim.tbl_extend("force", opts.extensions or {}, {
-                media_files = { filetypes = supportedFiletypes, find_cmd = findCmd },
+                media_files = { filetypes = supportedFiletypeSet:toList(), find_cmd = findCmd },
               })
             else
               LazyVim.error("Failed to load the telescope extension for `telescope-media-files.nvim`:\n" .. err)