feat: add excludes list (closes #151)

README.md

@@ -216,6 +216,10 @@ let bufferline.closable = v:true
 "  - middle-click: delete buffer
 let bufferline.clickable = v:true
 
+" Excludes buffers from the tabline
+let bufferline.exclude_ft = ['javascript']
+let bufferline.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
@@ -277,6 +281,10 @@ vim.g.bufferline = {
   --  - middle-click: delete buffer
   clickable = true,
 
+  -- Excludes buffers from the tabline
+  exclude_ft = ['javascript'],
+  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

doc/barbar.txt

@@ -233,6 +233,22 @@ Here are the groups that you should define if you'd like to style Barbar.
         let g:bufferline.clickable = v:true
 <
 
+					           *g:bufferline.exclude_ft*
+`g:bufferline.exclude_ft`		string[] (default v:null)
+
+	Excludes filetypes from appearing in the tabs.
+>
+        let g:bufferline.exclude_ft = ['javascript']
+<
+
+					           *g:bufferline.exclude_name*
+`g:bufferline.exclude_name`		string[] (default v:null)
+
+	Excludes buffers matching name from appearing in the tabs.
+>
+        let g:bufferline.exclude_name = ['package.json']
+<
+
 					           *g:bufferline.maximum_padding*
 `g:bufferline.maximum_padding`		int	(default 4)
 

lua/bufferline/state.lua

@@ -208,6 +208,43 @@ end
 
 -- Update state
 
+local function get_buffer_list()
+  local opts = vim.g.bufferline
+  local buffers = nvim.list_bufs()
+  local result = {}
+
+  local exclude_ft   = opts.exclude_ft
+  local exclude_name = opts.exclude_name
+
+  for i, buffer in ipairs(buffers) do
+
+    if not nvim.buf_get_option(buffer, 'buflisted') then
+      goto continue
+    end
+
+    if exclude_ft ~= vim.NIL then
+      local ft = nvim.buf_get_option(buffer, 'filetype')
+      if utils.has(exclude_ft, ft) then
+        goto continue
+      end
+    end
+
+    if exclude_name ~= vim.NIL then
+      local fullname = nvim.nvim_buf_get_name(buffer)
+      local name = utils.basename(fullname)
+      if utils.has(exclude_name, name) then
+        goto continue
+      end
+    end
+
+    table.insert(result, buffer)
+
+    ::continue::
+  end
+
+  return result
+end
+
 function m.update_names()
   local opts = vim.g.bufferline
   local buffer_index_by_name = {}
@@ -238,7 +275,7 @@ function m.update_names()
 end
 
 function m.get_updated_buffers(update_names)
-  local current_buffers = vim.fn['bufferline#filter']('&buflisted')
+  local current_buffers = get_buffer_list()
   local new_buffers =
     filter(
       function(b) return not includes(m.buffers, b) end,

lua/bufferline/utils.lua

@@ -24,6 +24,10 @@ local function index(tbl, n)
   return nil
 end
 
+local function has(tbl, n)
+  return index(tbl, n) ~= nil
+end
+
 local function slice(tbl, first, last)
   if type(tbl) == 'string' then
     return string.sub(tbl, first, last)
@@ -127,9 +131,11 @@ end
 return {
   len = len,
   index = index,
+  has = has,
   slice = slice,
   reverse = reverse,
   collect = collect,
+  basename = basename,
   get_buffer_name = get_buffer_name,
   get_unique_name = get_unique_name,
 }

plugin/bufferline.vim

@@ -92,6 +92,8 @@ let s:DEFAULT_OPTIONS = {
 \ 'auto_hide': v:false,
 \ 'clickable': v:true,
 \ 'closable': v:true,
+\ 'exclude_ft': v:null,
+\ 'exclude_name': v:null,
 \ 'icon_close_tab': '',
 \ 'icon_close_tab_modified': '●',
 \ 'icon_separator_active':   '▎',