fix: session restore order (closes #31)

autoload/bufferline/bbye.vim

@@ -87,18 +87,27 @@ function! s:str2bufnr(buffer)
     endif
 endfunction
 
+let s:empty_buffer = v:null
+
 function! s:new(bang)
     exe "enew" . a:bang
 
-    setl noswapfile
+    let s:empty_buffer = bufnr()
+
+    let b:empty_buffer = v:true
+
     " Regular buftype warns people if they have unsaved text there.  Wouldn't
     " want to lose someone's data:
     setl buftype=
+    setl noswapfile
 
     " If empty and out of sight, delete it right away:
     setl bufhidden=wipe
-    let buffer_number = bufnr()
-    exe 'au BufWipeout <buffer> call bufferline#close_direct(' buffer_number ')'
+
+    augroup bbye_empty_buffer
+        au!
+        au BufWipeout <buffer> call bufferline#close_direct(s:empty_buffer)
+    augroup END
 endfunction
 
 " Using the built-in :echoerr prints a stacktrace, which isn't that nice.

lua/bufferline/render.lua

@@ -73,7 +73,12 @@ local function render()
 
   -- Store current buffer to open new ones next to this one
   if nvim.buf_get_option(current, 'buflisted') then
-    state.last_current_buffer = current
+    local ok, is_empty = pcall(api.nvim_buf_get_var, current, 'empty_buffer')
+    if ok and is_empty then
+      state.last_current_buffer = nil
+    else
+      state.last_current_buffer = current
+    end
   end
 
   local opts = vim.g.bufferline

lua/bufferline/state.lua

@@ -129,11 +129,14 @@ local function open_buffers(new_buffers)
   -- Insert the buffers where they go
   for i, new_buffer in ipairs(new_buffers) do
     if utils.index(m.buffers, new_buffer) == nil then
+      local actual_index = new_index
       -- For special buffers, we add them at the end
       if vim.fn.getbufvar(new_buffer, '&buftype') ~= '' then
-        new_index = len(m.buffers) + 1
+        actual_index = len(m.buffers) + 1
+      else
+        new_index = new_index + 1
       end
-      table.insert(m.buffers, new_index, new_buffer)
+      table.insert(m.buffers, actual_index, new_buffer)
     end
   end