From 62b9c09f44dd2e0b4b44bdbe7e4f7347c935589d Mon Sep 17 00:00:00 2001
From: siduck <siduck@tutanota.com>
Date: Sun, 26 Jun 2022 06:24:52 +0530
Subject: [PATCH] fix tabufline crash when formatting buf | (#1265)

---
 init.lua                         |  6 +-----
 lua/core/init.lua                |  4 ++--
 lua/core/lazy_load.lua           |  2 +-
 lua/core/utils.lua               | 16 ++++++++++++++--
 lua/plugins/configs/nvimtree.lua |  1 +
 lua/ui/tabline.lua               | 28 ++++++++++++++++------------
 6 files changed, 35 insertions(+), 22 deletions(-)

diff --git a/init.lua b/init.lua
index 467fb0f..2237c5c 100644
--- a/init.lua
+++ b/init.lua
@@ -9,8 +9,4 @@ end, 0)
 require("core.packer").bootstrap()
 require "plugins"
 
-local user_conf, _ = pcall(require, "custom")
-
-if user_conf then
-   require "custom"
-end
+pcall(require, "custom")
diff --git a/lua/core/init.lua b/lua/core/init.lua
index 7fdf605..d731be5 100644
--- a/lua/core/init.lua
+++ b/lua/core/init.lua
@@ -39,7 +39,7 @@ autocmd("BufEnter", {
 vim.t.bufs = vim.api.nvim_list_bufs()
 
 -- thx to https://github.com/ii14 & stores buffer per tab -> table
-autocmd({ "BufAdd" }, {
+autocmd("BufAdd", {
    callback = function(args)
       if vim.t.bufs == nil then
          vim.t.bufs = { args.buf }
@@ -76,5 +76,5 @@ if require("core.utils").load_config().ui.tabufline_lazyloaded then
    require("core.lazy_load").tabufline()
 else
    vim.opt.showtabline = 2
-   vim.opt.tabline = "%!v:lua.require('ui.tabline').run()"
+   vim.opt.tabline = "%!v:lua.require'ui.tabline'.run()"
 end
diff --git a/lua/core/lazy_load.lua b/lua/core/lazy_load.lua
index 873b593..036be76 100644
--- a/lua/core/lazy_load.lua
+++ b/lua/core/lazy_load.lua
@@ -114,7 +114,7 @@ M.tabufline = function()
       callback = function()
          if #vim.fn.getbufinfo { buflisted = 1 } >= 2 then
             vim.opt.showtabline = 2
-            vim.opt.tabline = "%!v:lua.require('ui.tabline').run()"
+            vim.opt.tabline = "%!v:lua.require'ui.tabline'.run()"
             vim.api.nvim_del_augroup_by_name "TabuflineLazyLoad"
          end
       end,
diff --git a/lua/core/utils.lua b/lua/core/utils.lua
index b1c09c8..59d0ec5 100644
--- a/lua/core/utils.lua
+++ b/lua/core/utils.lua
@@ -195,8 +195,20 @@ M.packer_sync = function(...)
    end
 end
 
+M.bufilter = function()
+   local bufs = vim.t.bufs
+
+   for i = #bufs, 1, -1 do
+      if not vim.api.nvim_buf_is_loaded(bufs[i]) then
+         table.remove(bufs, i)
+      end
+   end
+
+   return bufs
+end
+
 M.tabuflineNext = function()
-   local bufs = vim.t.bufs or {}
+   local bufs = M.bufilter() or {}
 
    for i, v in ipairs(bufs) do
       if api.nvim_get_current_buf() == v then
@@ -207,7 +219,7 @@ M.tabuflineNext = function()
 end
 
 M.tabuflinePrev = function()
-   local bufs = vim.t.bufs or {}
+   local bufs = M.bufilter() or {}
 
    for i, v in ipairs(bufs) do
       if api.nvim_get_current_buf() == v then
diff --git a/lua/plugins/configs/nvimtree.lua b/lua/plugins/configs/nvimtree.lua
index 1bea58a..fdfb636 100644
--- a/lua/plugins/configs/nvimtree.lua
+++ b/lua/plugins/configs/nvimtree.lua
@@ -9,6 +9,7 @@ require("base46").load_highlight "nvimtree"
 local options = {
    filters = {
       dotfiles = false,
+      exclude = { vim.fn.stdpath "config" .. "/lua/custom" },
    },
    disable_netrw = true,
    hijack_netrw = true,
diff --git a/lua/ui/tabline.lua b/lua/ui/tabline.lua
index 09112a2..900b692 100644
--- a/lua/ui/tabline.lua
+++ b/lua/ui/tabline.lua
@@ -74,20 +74,24 @@ local function bufferlist()
    local buffers = ""
 
    for _, nr in ipairs(vim.t.bufs or {}) do -- buf = bufnr
-      local name = (#api.nvim_buf_get_name(nr) ~= 0) and fn.fnamemodify(api.nvim_buf_get_name(nr), ":t") or " No Name "
-      local close_btn = "%" .. nr .. "@TbKillBuf@ %X"
-      name = "%" .. nr .. "@TbGoToBuf@" .. add_fileInfo(name, nr) .. "%X"
+      if api.nvim_buf_is_loaded(nr) then
+         local name = (#api.nvim_buf_get_name(nr) ~= 0) and fn.fnamemodify(api.nvim_buf_get_name(nr), ":t")
+            or " No Name "
+         local close_btn = "%" .. nr .. "@TbKillBuf@ %X"
+         name = "%" .. nr .. "@TbGoToBuf@" .. add_fileInfo(name, nr) .. "%X"
 
-      -- color close btn for focused / hidden  buffers
-      if nr == api.nvim_get_current_buf() then
-         close_btn = (vim.bo[0].modified and "%#TbLineBufOnModified# ") or ("%#TbLineBufOnClose#" .. close_btn)
-         name = "%#TbLineBufOn#" .. name .. close_btn
-      else
-         close_btn = (vim.bo[nr].modified and "%#TbBufLineBufOffModified# ") or ("%#TbLineBufOffClose#" .. close_btn)
-         name = "%#TbLineBufOff#" .. name .. close_btn
+         -- color close btn for focused / hidden  buffers
+         if nr == api.nvim_get_current_buf() then
+            close_btn = (vim.bo[0].modified and "%#TbLineBufOnModified# ") or ("%#TbLineBufOnClose#" .. close_btn)
+            name = "%#TbLineBufOn#" .. name .. close_btn
+         else
+            close_btn = (vim.bo[nr].modified and "%#TbBufLineBufOffModified# ")
+               or ("%#TbLineBufOffClose#" .. close_btn)
+            name = "%#TbLineBufOff#" .. name .. close_btn
+         end
+
+         buffers = buffers .. name
       end
-
-      buffers = buffers .. name
    end
 
    return buffers .. "%#TblineFill#" .. "%=" -- buffers + empty space