feat: add before_source callback

README.md

@@ -220,10 +220,13 @@ require("persisted").setup({
 
 > **Note:** The author uses a *before* callback to ensure that [minimap.vim](https://github.com/wfxr/minimap.vim) is not written into the session. Its presence prevents the exact buffer and cursor position from being restored when loading a session
 
-The plugin allows for an *after* callback to be executed in relation to a session being sourced:
+The plugin allows for *before* and *after* callbacks to be executed in relation to a session being sourced:
 
 ```lua
 require("persisted").setup({
+  before_source = function()
+    print("Sourcing...")
+  end,
   after_source = function()
     -- Reload the LSP servers
     vim.lsp.stop_client(vim.lsp.get_active_clients())

lua/persisted/config.lua

@@ -11,6 +11,7 @@ local defaults = {
   ignored_dirs = nil, -- table of dirs that are ignored for auto-saving and auto-loading
   before_save = nil, -- function to run before the session is saved to disk
   after_save = nil, -- function to run after the session is saved to disk
+  before_source = nil, -- function to run before the session is sourced
   after_source = nil, -- function to run after the session is sourced
   telescope = { -- options for the telescope extension
     before_source = nil, -- function to run before the session is sourced via telescope

lua/persisted/init.lua

@@ -103,7 +103,7 @@ function M.load(opt)
   local session = opt.last and get_last() or get_current()
 
   if session and vim.fn.filereadable(session) ~= 0 then
-    utils.load_session(session, _, config.options.after_source)
+    utils.load_session(session, config.options.before_source, config.options.after_source)
   end
 
   if config.options.autosave and (allow_dir() and not ignore_dir()) then