feat(builtin.colorscheme): add option ignore_builtins (#3155)

doc/telescope.txt

@@ -1482,6 +1482,8 @@ builtin.colorscheme({opts})                  *telescope.builtin.colorscheme()*
                                      explicitly make available to telescope
                                      (default: {})
         {enable_preview}  (boolean)  if true, will preview the selected color
+        {ignore_builtins} (boolean)  if true, builtin colorschemes are not
+                                     listed
 
 
 builtin.marks({opts})                              *telescope.builtin.marks()*

lua/telescope/builtin/__internal.lua

@@ -993,6 +993,19 @@ internal.colorscheme = function(opts)
     end, vim.fn.getcompletion("", "color"))
   )
 
+  if opts.ignore_builtins then
+    -- stylua: ignore
+    local builtins = {
+      "blue", "darkblue", "default", "delek", "desert", "elflord", "evening",
+      "habamax", "industry", "koehler", "lunaperche", "morning", "murphy",
+      "pablo", "peachpuff", "quiet", "retrobox", "ron", "shine", "slate",
+      "sorbet", "torte", "vim", "wildcharm", "zaibatsu", "zellner",
+    }
+    colors = vim.tbl_filter(function(color)
+      return not vim.tbl_contains(builtins, color)
+    end, colors)
+  end
+
   local previewer
   if opts.enable_preview then
     -- define previewer

lua/telescope/builtin/init.lua

@@ -357,6 +357,7 @@ builtin.buffers = require_on_exported_call("telescope.builtin.__internal").buffe
 ---@param opts table: options to pass to the picker
 ---@field colors table: a list of additional colorschemes to explicitly make available to telescope (default: {})
 ---@field enable_preview boolean: if true, will preview the selected color
+---@field ignore_builtins boolean: if true, builtin colorschemes are not listed
 builtin.colorscheme = require_on_exported_call("telescope.builtin.__internal").colorscheme
 
 --- Lists vim marks and their value, jumps to the mark on `<cr>`