feat!: opts.need specifieds how many buffers should be open for saving. Replaces save_empty. Closes #19

lua/persistence/config.lua

@@ -3,7 +3,9 @@ local M = {}
 ---@class Persistence.Config
 local defaults = {
   dir = vim.fn.stdpath("state") .. "/sessions/", -- directory where session files are saved
-  save_empty = false, -- don't save if there are no open file buffers
+  -- minimum number of file buffers that need to be open to save
+  -- Set to 0 to always save
+  need = 1,
 }
 
 ---@type Persistence.Config

lua/persistence/init.lua

@@ -35,16 +35,14 @@ function M.start()
     group = vim.api.nvim_create_augroup("persistence", { clear = true }),
     callback = function()
       M.fire("SavePre")
-      if not Config.options.save_empty then
+      if Config.options.need > 0 then
         local bufs = vim.tbl_filter(function(b)
           if vim.bo[b].buftype ~= "" or vim.bo[b].filetype == "gitcommit" or vim.bo[b].filetype == "gitrebase" then
             return false
           end
           return vim.api.nvim_buf_get_name(b) ~= ""
         end, vim.api.nvim_list_bufs())
-        if #bufs == 0 then
-          return
-        end
+        return #bufs >= Config.options.need
       end
 
       M.save()