feat: add option always_show_tabs to control whether show tabline when there are only one tab.

README.md

@@ -139,6 +139,7 @@ require('lualine').setup {
     },
     ignore_focus = {},
     always_divide_middle = true,
+    always_show_tabline = true,
     globalstatus = false,
     refresh = {
       statusline = 1000,
@@ -378,6 +379,10 @@ options = {
                                -- can't take over the entire statusline even
                                -- if neither of 'x', 'y' or 'z' are present.
 
+  always_show_tabline = true -- When set to true, if you have configured lualine for displaying tabline
+                          -- then tabline will always show. If set to false, then tabline will be displayed
+                          -- only when there are more than 1 tab. (see :h showtabline)
+
   globalstatus = false,        -- enable global statusline (have a single statusline
                                -- at bottom of neovim instead of one for  every window).
                                -- This feature is only available in neovim 0.7 and higher.

lua/lualine.lua

@@ -479,7 +479,7 @@ local function set_tabline(hide)
       "call v:lua.require'lualine'.refresh({'kind': 'tabpage', 'place': ['tabline'], 'trigger': 'autocmd'})",
       'lualine_tal_refresh'
     )
-    modules.nvim_opts.set('showtabline', 2, { global = true })
+    modules.nvim_opts.set('showtabline', config.options.always_show_tabline and 2 or 1, { global = true })
     timers.halt_tal_refresh = false
   else
     modules.nvim_opts.restore('tabline', { global = true })

lua/lualine/config.lua

@@ -18,6 +18,7 @@ local config = {
     },
     ignore_focus = {},
     always_divide_middle = true,
+    always_show_tabline = true,
     globalstatus = vim.go.laststatus == 3,
     refresh = {
       statusline = 1000,

tests/spec/lualine_spec.lua

@@ -21,6 +21,7 @@ describe('Lualine', function()
         },
         ignore_focus = {},
         always_divide_middle = true,
+        always_show_tabline = true,
         globalstatus = false,
         refresh = {
           statusline = 1000,