EZ-substitution for word under current cursor

This is what I have to do when I live in a world where I can't get
ElixirLS to support its "rename" capability.

Author: TheDDMbassy

lua/plugins/telescope.lua

@@ -69,9 +69,19 @@ return { -- Fuzzy Finder (files, lsp, etc)
     local builtin = require 'telescope.builtin'
     vim.keymap.set('n', '<leader>sh', builtin.help_tags, { desc = '[S]earch [H]elp' })
     vim.keymap.set('n', '<leader>sk', builtin.keymaps, { desc = '[S]earch [K]eymaps' })
-    vim.keymap.set('n', '<leader>sf', builtin.find_files, { desc = '[S]earch [F]iles' })
     vim.keymap.set('n', '<C-p>', builtin.find_files, { desc = '[S]earch [F]iles' })
-    vim.keymap.set('n', '<leader>ss', builtin.builtin, { desc = '[S]earch [S]elect Telescope' })
+
+    -- vim.keymap.set('n', '<leader>ss', builtin.builtin, { desc = '[S]earch [S]elect Telescope' })
+    -- I wasn't using Search Select Telescope, and because ElixirLS doesn't have a good rename function, this will
+    -- have to do instead.
+    vim.keymap.set('n', '<leader>ss', [[:%s/\<<C-r><C-w>\>//g<Left><Left>]], { desc = '[S]earch [S]ubstitute word under cursor' })
+    vim.keymap.set(
+      'x', -- Visual mode
+      '<leader>ss',
+      [[:s/\<<C-r><C-w>\>//g<Left><Left>]],
+      { desc = '[S]earch [S]ubstitute first word in selection for all instances in selection' }
+    )
+
     vim.keymap.set('n', '<leader>sw', builtin.grep_string, { desc = '[S]earch current [W]ord' })
     vim.keymap.set('n', '<leader>sg', builtin.live_grep, { desc = '[S]earch by [G]rep' })
     vim.keymap.set('n', '<leader>sd', builtin.diagnostics, { desc = '[S]earch [D]iagnostics' })