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feat: restore buffers after loading a session #3335

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feat: restore buffers after loading a session #3335

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35 changes: 35 additions & 0 deletions lua/nvim-tree/autocmd.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,41 @@ function M.global()
end,
})

vim.api.nvim_create_autocmd("SessionLoadPost", {

@igorlfs igorlfs Jun 12, 2026

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I went with this location since it was the standard, but it might a good idea have this as an eager autocmd. Otherwise, any means of "lazy loading" may end up calling setup too late (sessions could be loaded relatively early, as in, part of the initilization with nvim -S Session.vim).

group = augroup_id,
callback = function()
local api = require("nvim-tree.api").tree

---@type table<integer,boolean>
local tabs = {}

for _, tab in ipairs(vim.api.nvim_list_tabpages()) do
for _, win in ipairs(vim.api.nvim_tabpage_list_wins(tab)) do
local buf = vim.api.nvim_win_get_buf(win)
if api.is_tree_buf(buf) then
tabs[tab] = true
end
end
end

vim.schedule(function()
api.close_in_all_tabs()

for tab, _ in pairs(tabs) do
if vim.api.nvim_tabpage_is_valid(tab) then
local win = vim.api.nvim_tabpage_get_win(tab)

if vim.api.nvim_win_is_valid(win) then
vim.api.nvim_win_call(win, function()
api.open()
end)
Comment on lines +44 to +47

@igorlfs igorlfs Jun 12, 2026

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There's an edge case with this approach: if nvim-tree was the only buf from a tabpage, it will not be restored. I think that's fine, as it's sort of unlikely. Could add a comment as a reference, or otherwise look into it. The vim api is not very tab friendly, but I guess it should be possible to hook an unholy :[N]tabnew...

end
end
end
end)
end,
})

if config.g.tab.sync.open then
vim.api.nvim_create_autocmd("TabEnter", {
group = augroup_id,
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