Neovim: Add hotkey to grep for selected text

nvim/init.lua

@@ -147,6 +147,22 @@ vim.keymap.set('n', '<C-l>', '<C-w><C-l>', { desc = 'Move focus to the right win
 vim.keymap.set('n', '<C-j>', '<C-w><C-j>', { desc = 'Move focus to the lower window' })
 vim.keymap.set('n', '<C-k>', '<C-w><C-k>', { desc = 'Move focus to the upper window' })
 
+-- [[ Utility functions ]]
+
+-- Retreive selected text from the editor.
+function vim.getVisualSelection()
+  vim.cmd 'noau normal! "vy"'
+  local text = vim.fn.getreg 'v'
+  vim.fn.setreg('v', {})
+
+  text = string.gsub(text, '\n', '')
+  if #text > 0 then
+    return text
+  else
+    return ''
+  end
+end
+
 -- [[ Basic Autocommands ]]
 --  See `:help lua-guide-autocommands`
 
@@ -316,6 +332,13 @@ require('lazy').setup({
         }
       end, { desc = '[S]earch Recent Files in CWD' })
 
+      vim.keymap.set('v', '<leader>g', function()
+        builtin.grep_string {
+          search = vim.getVisualSelection(),
+          prompt_title = 'Grep all files',
+        }
+      end, { desc = '[G]rep everywhere' })
+
       -- Slightly advanced example of overriding default behavior and theme
       vim.keymap.set('n', '<leader>/', function()
         -- You can pass additional configuration to Telescope to change the theme, layout, etc.