fix: more consistent current buffer commands

lua/codemp/buffers.lua

@@ -10,7 +10,7 @@ local user_buffer_name = {}
 local ticks = {}
 
 ---@param name string name of buffer to attach to
----@param buffer? integer if provided, use given buffer (will clear content)
+---@param buffer integer buffer to use for attaching (will clear content)
 ---@param content? string if provided, set this content after attaching
 ---@param nowait? boolean skip waiting for initial content sync
 ---@return BufferController
@@ -18,10 +18,6 @@ local function attach(name, buffer, content, nowait)
 	if buffer_id_map[name] ~= nil then
 		error("already attached to buffer " .. name)
 	end
-	if buffer == nil then
-		buffer = vim.api.nvim_create_buf(true, false)
-		vim.api.nvim_set_current_buf(buffer)
-	end
 	vim.api.nvim_set_option_value('fileformat', 'unix', { buf = buffer })
 	vim.api.nvim_buf_set_name(buffer, name)
 	local controller = session.workspace:attach_buffer(name):await()

lua/codemp/command.lua

@@ -110,7 +110,12 @@ local joined_actions = {
 	attach = function(path, bang)
 		if path == nil then error("missing buffer name") end
 		local buffer = nil
-		if bang then buffer = vim.api.nvim_get_current_buf() end
+		if bang then
+			buffer = vim.api.nvim_get_current_buf()
+		else
+			buffer = vim.api.nvim_create_buf(true, false)
+			vim.api.nvim_set_current_buf(buffer)
+		end
 		buffers.attach(path, buffer)
 	end,
 

lua/codemp/neo-tree/commands.lua

@@ -44,8 +44,9 @@ M.open = function(state, path, extra)
 	end
 	if selected.type == "buffer" then
 		local window = utils.get_appropriate_window(state)
-		local buf = vim.api.nvim_win_get_buf(window)
+		local buf = vim.api.nvim_create_buf(true, false)
 		vim.api.nvim_set_current_win(window)
+		vim.api.nvim_win_set_buf(window, buf)
 		buf_manager.attach(selected.name, buf)
 		return
 	end
@@ -56,6 +57,17 @@ M.open = function(state, path, extra)
 	error("unrecognized node type")
 end
 
+M.move = function(state, path, extra)
+	local selected = state.tree:get_node()
+	if selected.type == "buffer" then
+		local window = utils.get_appropriate_window(state)
+		local buf = vim.api.nvim_win_get_buf(window)
+		buf_manager.attach(selected.name, buf)
+		return
+	end
+	error("only buffers can be moved to current file")
+end
+
 M.add = function(_state)
 	if session.client == nil then
 		vim.ui.input({ prompt = "server address" }, function(input)