'<c-w>T' causes incorrect buffer list

[swerling]

The buffer list gets out of sync if you move a buffer to a new tab using <c-w>T.

To recreate:

1. Split a tab and load a file into each split, so that buffers contain 2 different files.

• Eg open file a, :e a.txt -> split, <c-w>v -> open file b, :e b.txt

2. Move one of the files to a new tab with <c-w>T
3. Go back to the original tab
4. :buffers

When you do the 3 steps above, you'll see that both files are still in scope on the first tab. The first file should have been moved to the second tab. Furthermore, trying to delete the buffer from the old tab using bDel removes it both from the original tab but also from the new one.

[tiagovla]

Would something like this work?

vim.keymap.set({ "n", "o", "x" }, "<c-w>T", function()
    local old_tab = vim.api.nvim_get_current_tabpage()
    local buf = vim.api.nvim_get_current_buf()
    vim.cmd [[execute "normal! \<C-W>T"]]
    local new_tab = vim.api.nvim_get_current_tabpage()
    if old_tab ~= new_tab then
        local cache = require("scope.core").cache
        cache[old_tab] = vim.tbl_filter(function(e)
            return e ~= buf
        end, cache[old_tab])
    end
end, { desc = "move into new tab", remap = false })