Fixed opening duplicate buffer/file on a new tab from Neo-tree i.e if the file is already open in a tab, trying to opening the same file on neo-tree will redirect to the already opened tab. Fixed some bugs. Added the same new-tab, empty-buffer functionalities to Telescope as well.

init.lua

@@ -112,8 +112,9 @@ require('lazy').setup({
       'rafamadriz/friendly-snippets',
     },
   },
+
   -- Useful plugin to show you pending keybinds.
-  { 'folke/which-key.nvim', opts = {} },
+  { 'folke/which-key.nvim',  opts = {} },
   {
     -- Adds git related signs to the gutter, as well as utilities for managing changes
     'lewis6991/gitsigns.nvim',
@@ -338,7 +339,7 @@ vim.keymap.set('n', '<leader>t', '<Cmd>tabnew +term<CR>i')
 -- Create an empty buffer in a new tab
 vim.keymap.set('n', '<Leader>e', function()
   vim.cmd 'tabnew' -- create a new tab
-  vim.cmd 'enew' -- create a new empty buffer in it
+  vim.cmd 'enew'   -- create a new empty buffer in it
 end, { noremap = true, silent = true })
 
 -- Save current buffer (asks for filename if new/unsaved)
@@ -434,6 +435,71 @@ require('telescope').setup {
 -- Enable telescope fzf native, if installed
 pcall(require('telescope').load_extension, 'fzf')
 
+-- smart_open function for Telescope to check if the current tab has an empty "No Name" buffer. If it has, it replaces the empty buffer and open a file in the same tab
+local actions = require 'telescope.actions'
+local action_state = require 'telescope.actions.state'
+
+local function smart_open(prompt_bufnr)
+  local entry = action_state.get_selected_entry()
+  if not entry then
+    return
+  end
+
+  local path = entry.path or entry.filename
+  if not path then
+    return
+  end
+
+  if prompt_bufnr and vim.api.nvim_buf_is_valid(prompt_bufnr) then
+    pcall(actions.close, prompt_bufnr)
+  end
+
+  -- 1. If file is already open → jump to it
+  local tabpages = vim.api.nvim_list_tabpages()
+  for _, tab in ipairs(tabpages) do
+    for _, win in ipairs(vim.api.nvim_tabpage_list_wins(tab)) do
+      local buf = vim.api.nvim_win_get_buf(win)
+      if vim.api.nvim_buf_get_name(buf) == path then
+        vim.api.nvim_set_current_tabpage(tab) -- jump to tab
+        vim.api.nvim_set_current_win(win)     -- jump to window
+        return
+      end
+    end
+  end
+
+  -- 2. If current tab has an empty "No Name" buffer → reuse it
+  local wins = vim.api.nvim_tabpage_list_wins(0)
+  for _, win in ipairs(wins) do
+    local buf = vim.api.nvim_win_get_buf(win)
+    local name = vim.api.nvim_buf_get_name(buf)
+    local buftype = vim.api.nvim_buf_get_option(buf, 'buftype')
+    local modified = vim.api.nvim_buf_get_option(buf, 'modified')
+    if name == '' and buftype == '' and not modified then
+      vim.api.nvim_set_current_win(win)
+      vim.cmd('edit ' .. vim.fn.fnameescape(path))
+      return
+    end
+  end
+
+  -- 3. Otherwise → open in a new tab
+  vim.cmd('tabnew ' .. vim.fn.fnameescape(path))
+end
+
+-- Telescope keymap using Smart Open
+vim.keymap.set('n', '<leader>sf', function()
+  require('telescope.builtin').find_files {
+    attach_mappings = function(_, map)
+      map('i', '<CR>', function(prompt_bufnr)
+        smart_open(prompt_bufnr)
+      end)
+      map('n', '<CR>', function(prompt_bufnr)
+        smart_open(prompt_bufnr)
+      end)
+      return true
+    end,
+  }
+end, { desc = '[S]earch [F]iles (Smart Open)' })
+
 -- Telescope live_grep in git root
 -- Function to find the git root directory based on the current buffer's path
 local function find_git_root()
@@ -490,7 +556,6 @@ end
 vim.keymap.set('n', '<leader>s/', telescope_live_grep_open_files, { desc = '[S]earch [/] in Open Files' })
 vim.keymap.set('n', '<leader>ss', require('telescope.builtin').builtin, { desc = '[S]earch [S]elect Telescope' })
 vim.keymap.set('n', '<leader>gf', require('telescope.builtin').git_files, { desc = 'Search [G]it [F]iles' })
-vim.keymap.set('n', '<leader>sf', require('telescope.builtin').find_files, { desc = '[S]earch [F]iles' })
 vim.keymap.set('n', '<leader>sh', require('telescope.builtin').help_tags, { desc = '[S]earch [H]elp' })
 vim.keymap.set('n', '<leader>sw', require('telescope.builtin').grep_string, { desc = '[S]earch current [W]ord' })
 vim.keymap.set('n', '<leader>sg', require('telescope.builtin').live_grep, { desc = '[S]earch by [G]rep' })

lua/custom/plugins/filetree.lua

@@ -1,86 +1,111 @@
 -- Unless you are still migrating, remove the deprecated commands from v1.x
-vim.cmd([[ let g:neo_tree_remove_legacy_commands = 1 ]])
+vim.cmd [[ let g:neo_tree_remove_legacy_commands = 1 ]]
 
 return {
-  "nvim-neo-tree/neo-tree.nvim",
-  version = "*",
+  'nvim-neo-tree/neo-tree.nvim',
+  version = '*',
   dependencies = {
-    "nvim-lua/plenary.nvim",
-    "nvim-tree/nvim-web-devicons", -- not strictly required, but recommended
-    "MunifTanjim/nui.nvim",
+    'nvim-lua/plenary.nvim',
+    'nvim-tree/nvim-web-devicons',
+    'MunifTanjim/nui.nvim',
   },
   config = function()
-  
-  -- smart_open function: If there's an empty "No Name" buffer, replace it and open files in the same tab
-local function smart_open(state)
-	local node = state.tree:get_node()
-	if not node then return end
-	local path = node:get_id()
+    local function smart_open(state)
+      local node = state.tree:get_node()
+      if not node then
+        return
+      end
+      local path = node:get_id()
 
-	-- Get the window in the current tab that is NOT Neo-tree
-	local wins = vim.api.nvim_tabpage_list_wins(0)
-	local target_buf = nil
-	for _, win in ipairs(wins) do
-		local buf = vim.api.nvim_win_get_buf(win)
-		local bufname = vim.api.nvim_buf_get_name(buf)
-		local buftype = vim.api.nvim_buf_get_option(buf, "buftype")
-		local modified = vim.api.nvim_buf_get_option(buf, "modified")
-		-- find a window with empty, unmodified buffer
-		if bufname == "" and buftype == "" and not modified then
-			   target_buf = buf
-			   vim.api.nvim_set_current_win(win)
-			   break
-		end
-	end
+      -- Reuse already open buffer in any tab safely
+      for _, tab in ipairs(vim.api.nvim_list_tabpages()) do
+        if vim.api.nvim_tabpage_is_valid(tab) then
+          for _, win in ipairs(vim.api.nvim_tabpage_list_wins(tab)) do
+            if vim.api.nvim_win_is_valid(win) then
+              local buf = vim.api.nvim_win_get_buf(win)
+              if vim.api.nvim_buf_is_valid(buf) and vim.api.nvim_buf_get_name(buf) == path then
+                vim.api.nvim_set_current_tabpage(tab)
+                vim.api.nvim_set_current_win(win)
+                -- close Neo-tree if open
+                for _, w in ipairs(vim.api.nvim_list_wins()) do
+                  if vim.api.nvim_win_is_valid(w) then
+                    local b = vim.api.nvim_win_get_buf(w)
+                    if vim.api.nvim_buf_is_valid(b) and vim.api.nvim_buf_get_option(b, 'filetype') == 'neo-tree' then
+                      vim.api.nvim_win_close(w, true)
+                    end
+                  end
+                end
+                return
+              end
+            end
+          end
+        end
+      end
 
-	if target_buf then
-		-- replace the empty buffer
-		vim.cmd("edit " .. path)
-	else
-		-- otherwise open in new tab
-		require("neo-tree.sources.filesystem.commands").open_tabnew(state)
-	end
-end
+      -- Reuse empty buffer in current tab
+      local wins = vim.api.nvim_tabpage_list_wins(0)
+      local empty_buf = nil
+      for _, win in ipairs(wins) do
+        if vim.api.nvim_win_is_valid(win) then
+          local buf = vim.api.nvim_win_get_buf(win)
+          if vim.api.nvim_buf_is_valid(buf) then
+            local bufname = vim.api.nvim_buf_get_name(buf)
+            local buftype = vim.api.nvim_buf_get_option(buf, 'buftype')
+            local modified = vim.api.nvim_buf_get_option(buf, 'modified')
+            if bufname == '' and buftype == '' and not modified then
+              empty_buf = buf
+              vim.api.nvim_set_current_win(win)
+              break
+            end
+          end
+        end
+      end
+
+      if empty_buf then
+        vim.cmd('edit ' .. vim.fn.fnameescape(path))
+      else
+        vim.cmd('tabnew ' .. vim.fn.fnameescape(path))
+      end
+
+      -- Always close Neo-tree window if open
+      for _, win in ipairs(vim.api.nvim_list_wins()) do
+        if vim.api.nvim_win_is_valid(win) then
+          local buf = vim.api.nvim_win_get_buf(win)
+          if vim.api.nvim_buf_is_valid(buf) and vim.api.nvim_buf_get_option(buf, 'filetype') == 'neo-tree' then
+            vim.api.nvim_win_close(win, true)
+          end
+        end
+      end
+    end
 
     require('neo-tree').setup {
-    -- Open Neo-tree in a floating window in middle at first launch when Neovim is opened inside a directory with "nvim ."
-    	close_if_last_window = true, -- close Neo-tree if it's the last window
-  	popup_border_style = "rounded",
-	enable_git_status = true,
-	enable_diagnostics = true,
-	default_component_configs = {
-	  indent = {
-	    padding = 1,
-	    indent_size = 2,
-	  },
-    	  icon = {
-		folder_closed = "",
-	        folder_open = "",
-	        folder_empty = "ﰊ",
-    	  },
-  	},
-    	window = {
-    	  position = "float",  -- this makes Neo-tree open in the middle
-          width = 40,
-          mapping_options = {
-           noremap = true,
-           nowait = true,
-          },
-	  mappings = {
-	   ["<cr>"] = smart_open, -- Enter → always open file in new tab if there's no empty buffer
-	   ["t"]    = "noop",        -- disable t
-	  },
-	},
-        filesystem = {
-	  follow_current_file = true,
-	  use_libuv_file_watcher = true,
-	  hijack_netrw_behavior = "open_default",
-          filtered_items = {
-          visible = true, -- This is what you want: If you set this to `true`, all "hide" just mean "dimmed out"
+      close_if_last_window = true,
+      popup_border_style = 'rounded',
+      enable_git_status = true,
+      enable_diagnostics = true,
+      default_component_configs = {
+        indent = { padding = 1, indent_size = 2 },
+        icon = { folder_closed = '', folder_open = '', folder_empty = 'ﰊ' },
+      },
+      window = {
+        position = 'float',
+        width = 40,
+        mapping_options = { noremap = true, nowait = true },
+        mappings = {
+          ['<cr>'] = smart_open,
+          ['t'] = 'noop',
+        },
+      },
+      filesystem = {
+        follow_current_file = true,
+        use_libuv_file_watcher = true,
+        hijack_netrw_behavior = 'open_default',
+        filtered_items = {
+          visible = true,
           hide_dotfiles = false,
           hide_gitignored = true,
-          },
-        }, 
-      }
+        },
+      },
+    }
   end,
 }