a bit sloppy but working

lua/config/bufferline.lua

@@ -0,0 +1,75 @@
+local utils = require("functions")
+require("bufferline").setup({
+	options = {
+		numbers = function(opts)
+			return string.format("%s", opts.id) -- :h bufferline-numbers
+		end,
+		-- packer.nvim: Error running config for nvim-bufferline.lua: /home/luke/.config/nvim/lua/config/bufferline.lua:7: attempt to index local 'utils' (a boolean value) 
+		-- close_command = utils.bufdelete, -- can be a string | function, see "Mouse actions"
+		right_mouse_command = "bdelete! %d", -- can be a string | function, see "Mouse actions"
+		left_mouse_command = "buffer %d", -- can be a string | function, see "Mouse actions"
+		middle_mouse_command = nil, -- can be a string | function, see "Mouse actions"
+		indicator_icon = " ",
+		buffer_close_icon = "",
+		modified_icon = "●",
+		close_icon = "",
+		left_trunc_marker = "",
+		right_trunc_marker = "",
+		max_name_length = 18,
+		max_prefix_length = 15, -- prefix used when a buffer is de-duplicated
+		tab_size = 18,
+		diagnostics = "nvim_lsp",
+		diagnostics_indicator = function(count, level)
+			local icon = level:match("error") and " " or " "
+			return " " .. icon .. count
+		end,
+		-- NOTE: this will be called a lot so don't do any heavy processing here
+		custom_filter = function(buf_number, buf_numbers)
+			-- filter out filetypes you don't want to see
+			if vim.bo[buf_number].filetype ~= "qf" then
+				return true
+			else
+				return false
+			end
+			-- filter out by buffer name
+			-- if vim.fn.bufname(buf_number) ~= "<buffer-name-I-dont-want>" then
+			-- 	return true
+			-- else
+			-- 	return false
+			-- end
+			-- filter out based on arbitrary rules
+			-- e.g. filter out vim wiki buffer from tabline in your work repo
+			-- if vim.fn.getcwd() == "<work-repo>" and vim.bo[buf_number].filetype ~= "wiki" then
+			-- 	return true
+			-- else
+			-- 	return false
+			-- end
+			-- filter out by it's index number in list (don't show first buffer)
+			-- if buf_numbers[1] ~= buf_number then
+			-- 	return true
+			-- else
+			-- 	return false
+			-- end
+		end,
+		offsets = {
+			{
+				filetype = "NvimTree",
+				text = " File Explorer",
+				highlight = "Directory",
+				text_align = "left",
+				padding = 1,
+			},
+		},
+		show_buffer_icons = true, -- disable filetype icons for buffers
+		show_buffer_close_icons = false,
+		show_close_icon = false,
+		show_tab_indicators = true,
+		persist_buffer_sort = true, -- whether or not custom sorted buffers should persist
+		-- can also be a table containing 2 custom separators
+		-- [focused and unfocused]. eg: { '|', '|' }
+		separator_style = "thin",
+		enforce_regular_tabs = false,
+		always_show_bufferline = false,
+		sort_by = "id",
+	},
+})