nvim/lua/setupbufferline.lua

vim.opt.termguicolors = true
require("bufferline").setup({
	options = {
		mode = "buffers",
		numbers = "buffer_id",
		indicator = {
			-- icon = "| ",
			style = "icon",
		},
		color_icons = true, -- whether or not to add the filetype icon highlights
	},
})
-- {
--         options = {
--             mode = "buffers", -- set to "tabs" to only show tabpages instead
--             style_preset = bufferline.style_preset.default, -- or bufferline.style_preset.minimal,
--             themable = true | false, -- allows highlight groups to be overriden i.e. sets highlights as default
--             numbers = "none" | "ordinal" | "buffer_id" | "both" | function({ ordinal, id, lower, raise }): string,
--             close_command = "bdelete! %d",       -- can be a string | function, | false see "Mouse actions"
--             right_mouse_command = "bdelete! %d", -- can be a string | function | false, see "Mouse actions"
--             left_mouse_command = "buffer %d",    -- can be a string | function, | false see "Mouse actions"
--             middle_mouse_command = nil,          -- can be a string | function, | false see "Mouse actions"
--             indicator = {
--                 icon = '▎', -- this should be omitted if indicator style is not 'icon'
--                 style = 'icon' | 'underline' | 'none',
--             },
--             buffer_close_icon = '󰅖',
--             modified_icon = '●',
--             close_icon = '',
--             left_trunc_marker = '',
--             right_trunc_marker = '',
--             --- name_formatter can be used to change the buffer's label in the bufferline.
--             --- Please note some names can/will break the
--             --- bufferline so use this at your discretion knowing that it has
--             --- some limitations that will *NOT* be fixed.
--             name_formatter = function(buf)  -- buf contains:
--                   -- name                | str        | the basename of the active file
--                   -- path                | str        | the full path of the active file
--                   -- bufnr (buffer only) | int        | the number of the active buffer
--                   -- buffers (tabs only) | table(int) | the numbers of the buffers in the tab
--                   -- tabnr (tabs only)   | int        | the "handle" of the tab, can be converted to its ordinal number using: `vim.api.nvim_tabpage_get_number(buf.tabnr)`
--             end,
--             max_name_length = 18,
--             max_prefix_length = 15, -- prefix used when a buffer is de-duplicated
--             truncate_names = true, -- whether or not tab names should be truncated
--             tab_size = 18,
--             diagnostics = false | "nvim_lsp" | "coc",
--             diagnostics_update_in_insert = false,
--             -- The diagnostics indicator can be set to nil to keep the buffer name highlight but delete the highlighting
--             diagnostics_indicator = function(count, level, diagnostics_dict, context)
--                 return "("..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 ~= "<i-dont-want-to-see-this>" then
--                     return true
--                 end
--                 -- filter out by buffer name
--                 if vim.fn.bufname(buf_number) ~= "<buffer-name-I-dont-want>" then
--                     return true
--                 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
--                 end
--                 -- filter out by it's index number in list (don't show first buffer)
--                 if buf_numbers[1] ~= buf_number then
--                     return true
--                 end
--             end,
--             offsets = {
--                 {
--                     filetype = "NvimTree",
--                     text = "File Explorer" | function ,
--                     text_align = "left" | "center" | "right"
--                     separator = true
--                 }
--             },
--             color_icons = true | false, -- whether or not to add the filetype icon highlights
--             get_element_icon = function(element)
--               -- element consists of {filetype: string, path: string, extension: string, directory: string}
--               -- This can be used to change how bufferline fetches the icon
--               -- for an element e.g. a buffer or a tab.
--               -- e.g.
--               local icon, hl = require('nvim-web-devicons').get_icon_by_filetype(element.filetype, { default = false })
--               return icon, hl
--               -- or
--               local custom_map = {my_thing_ft: {icon = "my_thing_icon", hl}}
--               return custom_map[element.filetype]
--             end,
--             show_buffer_icons = true | false, -- disable filetype icons for buffers
--             show_buffer_close_icons = true | false,
--             show_close_icon = true | false,
--             show_tab_indicators = true | false,
--             show_duplicate_prefix = true | false, -- whether to show duplicate buffer prefix
--             duplicates_across_groups = true, -- whether to consider duplicate paths in different groups as duplicates
--             persist_buffer_sort = true, -- whether or not custom sorted buffers should persist
--             move_wraps_at_ends = false, -- whether or not the move command "wraps" at the first or last position
--             -- can also be a table containing 2 custom separators
--             -- [focused and unfocused]. eg: { '|', '|' }
--             separator_style = "slant" | "slope" | "thick" | "thin" | { 'any', 'any' },
--             enforce_regular_tabs = false | true,
--             always_show_bufferline = true | false,
--             auto_toggle_bufferline = true | false,
--             hover = {
--                 enabled = true,
--                 delay = 200,
--                 reveal = {'close'}
--             },
--             sort_by = 'insert_after_current' |'insert_at_end' | 'id' | 'extension' | 'relative_directory' | 'directory' | 'tabs' | function(buffer_a, buffer_b)
--                 -- add custom logic
--                 return buffer_a.modified > buffer_b.modified
--             end
--         }
--     }