Change bufferline plugin to nvim-bufferline

It looks better than barbar.nvim, IMO.

lua/config/barbar.lua

@@ -1,70 +0,0 @@
--- Set barbar's options
-vim.g.bufferline = {
-  -- Enable/disable animations
-  animation = true,
-
-  -- Enable/disable auto-hiding the tab bar when there is a single buffer
-  auto_hide = false,
-
-  -- Enable/disable current/total tabpages indicator (top right corner)
-  tabpages = true,
-
-  -- Enable/disable close button
-  closable = true,
-
-  -- Enables/disable clickable tabs
-  --  - left-click: go to buffer
-  --  - middle-click: delete buffer
-  clickable = true,
-
-  -- Excludes buffers from the tabline
-  exclude_ft = {'javascript', 'qf'},
-  exclude_name = {'package.json'},
-
-  -- Enable/disable icons
-  -- if set to 'numbers', will show buffer index in the tabline
-  -- if set to 'both', will show buffer index and icons in the tabline
-  icons = 'buffer_numbers',
-
-  -- If set, the icon color will follow its corresponding buffer
-  -- highlight group. By default, the Buffer*Icon group is linked to the
-  -- Buffer* group (see Highlighting below). Otherwise, it will take its
-  -- default value as defined by devicons.
-  icon_custom_colors = false,
-
-  -- Configure icons on the bufferline.
-  icon_separator_active = '',
-  icon_separator_inactive = '▎',
-  icon_close_tab = '',
-  icon_close_tab_modified = '●',
-  icon_pinned = '車',
-
-  -- If true, new buffers will be inserted at the end of the list.
-  -- Default is to insert after current buffer.
-  insert_at_end = false,
-
-  -- Sets the maximum padding width with which to surround each tab
-  maximum_padding = 1,
-
-  -- Sets the maximum buffer name length.
-  maximum_length = 30,
-
-  -- If set, the letters for each buffer in buffer-pick mode will be
-  -- assigned based on their name. Otherwise or in case all letters are
-  -- already assigned, the behavior is to assign letters in order of
-  -- usability (see order below)
-  semantic_letters = true,
-
-  -- New buffer letters are assigned in this order. This order is
-  -- optimal for the qwerty keyboard layout but might need adjustement
-  -- for other layouts.
-  letters = 'asdfjkl;ghnmxcvbziowerutyqpASDFJKLGHNMXCVBZIOWERUTYQP',
-
-  -- Sets the name of unnamed buffers. By default format is "[Buffer X]"
-  -- where X is the buffer number. But only a static string is accepted here.
-  no_name_title = 'No name',
-}
-
-vim.cmd 'hi BufferCurrent guibg=#85d3f2 guifg=#2c2e34'
-vim.cmd 'hi BufferCurrentIndex guibg=#85d3f2 guifg=#2c2e34'
-vim.cmd 'hi link BufferInactiveIndex BufferInactive'

lua/config/nvim-bufferline.lua

@@ -0,0 +1,45 @@
+require('bufferline').setup {
+  options = {
+    numbers = "buffer_id",
+    number_style = "superscript",
+    mappings = false,
+    close_command = "bdelete! %d",
+    right_mouse_command = nil,
+    left_mouse_command = "buffer %d",
+    middle_mouse_command = nil,
+    indicator_icon = '▎',
+    buffer_close_icon = '',
+    modified_icon = '●',
+    close_icon = '',
+    left_trunc_marker = '',
+    right_trunc_marker = '',
+    max_name_length = 18,
+    max_prefix_length = 15,
+    tab_size = 10,
+    diagnostics = false,
+    custom_filter = function(bufnr)
+      -- if the result is false, this buffer will be shown, otherwise, this
+      -- buffer will be hidden.
+
+      -- filter out filetypes you don't want to see
+      local exclude_ft = {'qf', 'fugitive', 'git'}
+      local cur_ft = vim.bo[bufnr].filetype
+      local should_filter = vim.tbl_contains(exclude_ft, cur_ft)
+
+      if should_filter then
+        return false
+      end
+
+      return true
+    end,
+    show_buffer_icons = false,
+    show_buffer_close_icons = true,
+    show_close_icon = true,
+    show_tab_indicators = true,
+    persist_buffer_sort = true, -- whether or not custom sorted buffers should persist
+    separator_style = "slant",
+    enforce_regular_tabs = false,
+    always_show_bufferline = true,
+    sort_by = 'id'
+  }
+}

lua/plugins.lua

@@ -102,7 +102,7 @@ require('packer').startup(
     use 'vim-airline/vim-airline-themes'
     use 'vim-airline/vim-airline'
 
-    use {'romgrk/barbar.nvim', config = [[require('config.barbar')]]}
+    use {'akinsho/nvim-bufferline.lua', config = [[require('config.nvim-bufferline')]]}
 
     -- fancy start screen
     use {'mhinz/vim-startify'}