add helpful indentation status/changing things to neovim

nvim/init.lua

@@ -26,6 +26,7 @@ vim.g.have_nerd_font = true
 require 'options'
 require 'keymaps'
 require 'autocmds'
+require 'cmds'
 require 'lazy-bootstrap'
 require 'lazy-plugins'
 

nvim/lua/cmds.lua

@@ -0,0 +1,17 @@
+local function set_indent(use_spaces, size)
+  vim.o.expandtab = use_spaces
+  vim.o.shiftwidth = size
+  vim.o.tabstop = size
+end
+
+vim.api.nvim_create_user_command('IndentTabs', function(opts)
+  local size = tonumber(opts.fargs[1])
+  set_indent(false, size)
+  print('Set buffer indentation to tabs with indent/tab size of', size)
+end, { nargs = 1 })
+
+vim.api.nvim_create_user_command('IndentSpaces', function(opts)
+  local size = tonumber(opts.fargs[1])
+  set_indent(true, size)
+  print('Set buffer indentation to spaces with indent/tab size of', size)
+end, { nargs = 1 })

nvim/lua/plugins/lualine.lua

@@ -5,6 +5,20 @@ return {
       'nvim-tree/nvim-web-devicons',
     },
     config = function()
+      local current_indent = function()
+        local output = ''
+        if vim.o.expandtab then
+          output = output .. 'S'
+        else
+          output = output .. 'T'
+        end
+        output = output .. ':' .. vim.o.shiftwidth
+        if vim.o.shiftwidth ~= vim.o.tabstop then
+          output = output .. ':' .. vim.o.tabstop
+        end
+        return output
+      end
+
       require('lualine').setup {
         options = {
           globalstatus = false,
@@ -18,7 +32,7 @@ return {
           lualine_a = { 'mode' },
           lualine_b = { 'branch', 'diff', 'diagnostics' },
           lualine_c = { { 'filename', path = 2 } },
-          lualine_x = { 'encoding', 'fileformat', 'filetype' },
+          lualine_x = { 'encoding', 'fileformat', 'filetype', current_indent },
           lualine_y = { 'progress' },
           lualine_z = { 'location' },
         },

nvim/lua/plugins/vim-sleuth.lua

@@ -1,5 +1,6 @@
 return {
   { -- Detect tabstop and shiftwidth automatically
+    -- Run `:verbose Sleuth` to have the plugin display the reason it set options to what
     'tpope/vim-sleuth',
   },
 }