Fix: Handle files in buffers when they are deleted.

init.lua

@@ -504,5 +504,53 @@ vim.api.nvim_create_autocmd({ 'CursorMoved', 'CursorMovedI', 'InsertEnter', 'Ins
 vim.keymap.set('n', '<Esc>', '<Esc><Cmd>echo ""<CR>', { noremap = true, silent = true })
 vim.keymap.set('v', '<Esc>', '<Esc><Cmd>echo ""<CR>', { noremap = true, silent = true })
 
+-- When a file is deleted externally, rename all its buffers to "[file]: file removed"
+vim.api.nvim_create_autocmd({ 'BufEnter', 'BufWritePost' }, {
+	callback = function()
+		local current_buf = vim.api.nvim_get_current_buf()
+		local ft = vim.api.nvim_buf_get_option(current_buf, 'filetype')
+		local current_name = vim.api.nvim_buf_get_name(current_buf)
+		-- Skip Neo-tree, unnamed, or already-marked buffers
+		if ft == 'neo-tree' or current_name == '' or current_name:match 'file removed' then
+			return
+		end
+		-- If this file no longer exists, mark all buffers showing it
+		if vim.fn.filereadable(current_name) == 0 then
+			local filename = vim.fn.fnamemodify(current_name, ':t')
+			local new_name = string.format('[%s]: file removed', filename)
+			-- Iterate over all listed buffers
+			for _, buf in ipairs(vim.api.nvim_list_bufs()) do
+				if vim.api.nvim_buf_is_valid(buf) then
+					local name = vim.api.nvim_buf_get_name(buf)
+					if name == current_name and not name:match 'file removed' then
+						-- Temporarily unlist so renaming works cleanly
+						vim.api.nvim_buf_set_option(buf, 'buflisted', false)
+						vim.api.nvim_buf_set_name(buf, new_name)
+						vim.api.nvim_buf_set_option(buf, 'buflisted', true)
+					end
+				end
+			end
+		end
+	end,
+})
+-- Automatically wipe "file removed" buffers when they are closed
+vim.api.nvim_create_autocmd('BufWinLeave', {
+	callback = function(args)
+		local buf = args.buf
+		if vim.api.nvim_buf_is_valid(buf) then
+			local name = vim.api.nvim_buf_get_name(buf)
+			local marked = pcall(vim.api.nvim_buf_get_var, buf, 'marked_for_wipe') and vim.api.nvim_buf_get_var(buf, 'marked_for_wipe')
+			-- If the buffer was marked for wipe or name indicates it's deleted
+			if marked or (name ~= '' and name:match 'file removed') then
+				vim.schedule(function()
+					if vim.api.nvim_buf_is_valid(buf) then
+						vim.cmd('bwipeout! ' .. buf)
+					end
+				end)
+			end
+		end
+	end,
+})
+
 -- The line beneath this is called `modeline`. See `:help modeline`
 -- vim: ts=2 sts=2 sw=2 et

lua/plugins/custom/filetree.lua

@@ -10,10 +10,40 @@ return {
 		'MunifTanjim/nui.nvim',
 	},
 	config = function()
+		-- Handling deleted file buffers, marking them as removed
+		local function delete_file_mark_removed(state)
+			local node = state.tree:get_node()
+			if not node or node.type ~= 'file' then
+				return true
+			end
+			local path = node.path
+			-- Ask for confirmation
+			local choice = vim.fn.confirm('Are you sure you want to delete: ' .. vim.fn.fnamemodify(path, ':t') .. '?', '&Yes\n&No', 2)
+			if choice ~= 1 then
+				return true
+			end -- user chose "No"
+			local buf_to_update = nil
+			for _, win in ipairs(vim.api.nvim_list_wins()) do
+				local buf = vim.api.nvim_win_get_buf(win)
+				if vim.api.nvim_buf_is_valid(buf) and vim.api.nvim_buf_get_name(buf) == path then
+					buf_to_update = buf
+					break
+				end
+			end
+			-- Delete file
+			vim.loop.fs_unlink(path)
+			-- Refresh Neo-tree
+			state.commands.refresh(state)
+			-- Update buffer name
+			if buf_to_update and vim.api.nvim_buf_is_valid(buf_to_update) then
+				local filename = vim.fn.fnamemodify(path, ':t')
+				vim.api.nvim_buf_set_name(buf_to_update, filename .. ':file removed')
+			end
+			return true
+		end
 		-- Track last created file or folder
 		local last_created_path = nil
 		vim.api.nvim_set_hl(0, 'NeoTreeLastCreated', { fg = '#00ff00', bold = true })
-
 		local function normalize_path(path)
 			return vim.fn.fnamemodify(path, ':p')
 		end
@@ -160,6 +190,7 @@ return {
 						smart_open_split(state, 'v')
 					end,
 					['t'] = 'noop',
+					['d'] = delete_file_mark_removed,
 					['a'] = function(state)
 						-- Get the current node
 						local node = state.tree:get_node()