Switch between terminal outputs

[mrphil2105]

Hey. I am using nvim-dap together with nvim-dap-ui to debug a monorepo project. I am running multiple debug sessions at once, which results in an arbitrary output of a random debug configuration being shown in the DAP Console. I need a way to switch between the different session outputs. I have tried looking through the source code of both nvim-dap and nvim-dap-ui, but without any luck. It seems nvim-dap-ui supplies a single buffer number to nvim-dap, which is then used to display output inside the on_stdout function and send inputs in the on_input function, using the nvim_chan_send function. Is there perhaps a way I can switch between which stdout and stdin is being sent to the channel? Thanks in advance.

[mfussenegger]

Is this about the REPL or about integrated terminals?
If it's the REPL, can you switch to integrated terminals?
If it's integrated terminal - with pure nvim-dap you'd get one dedicated terminal window per debug session. If that's not supported in nvim-dap-ui you'd have to bring it up there.

[mrphil2105]

It is about integrated terminals. I know I can create a buffer per debug session, e.g. by using tabnew. But it seems nvim-dap-ui always provides the same buffer number, regardless of how many debug sessions I have. Is there possibly a way to create x hidden buffers and somehow sync them with the nvim-dap-ui buffer, and switch between which one is synced? Or would I have to add multiple buffer support to nvim-dap-ui directly?

[mfussenegger]

But it seems nvim-dap-ui always provides the same buffer number, regardless of how many debug sessions I have.

Then you have to ask for help in the nvim-dap-ui project. nvim-dap uses a buffer pool for the terminals:

nvim-dap/lua/dap/session.lua

Lines 170 to 201 in fc880e8

	function terminals.acquire(win_cmd, config)
	local buf = next(pool)
	if buf then
	pool[buf] = nil
	if api.nvim_buf_is_valid(buf) then
	vim.bo[buf].modified = false
	return buf
	end
	end
	local terminal_win
	buf, terminal_win = create_terminal_buf(win_cmd)
	if terminal_win then
	if vim.fn.has('nvim-0.8') == 1 then
	-- older versions don't support the `win` key
	api.nvim_set_option_value('number', false, { scope = 'local', win = terminal_win })
	api.nvim_set_option_value('relativenumber', false, { scope = 'local', win = terminal_win })
	api.nvim_set_option_value('signcolumn', 'no', { scope = 'local', win = terminal_win })
	else
	-- this is like `:set` so new windows will inherit the values :/
	vim.wo[terminal_win].number = false
	vim.wo[terminal_win].relativenumber = false
	vim.wo[terminal_win].signcolumn = "no"
	end
	end
	vim.b[buf]['dap-type'] = config.type
	return buf, terminal_win
	end
	---@param b number
	function terminals.release(b)
	pool[b] = true
	end