feat: add diagnostic and document symbols source to neo-tree

lua/plugins/neo-tree.lua

@@ -19,11 +19,24 @@ return {
     dependencies = {
         "nvim-lua/plenary.nvim",
         "nvim-tree/nvim-web-devicons",
-        "MunifTanjim/nui.nvim"
+        "MunifTanjim/nui.nvim",
+        --
+        -- List language server diagnostics
+        --
+        -- Source: https://github.com/mrbjarksen/neo-tree-diagnostics.nvim
+        -- ..............................................
+        --
+        'mrbjarksen/neo-tree-diagnostics.nvim'
     },
     cmd = "Neotree",
     opts = {
         popup_border_style = ui.border,
+        sources = {
+            "filesystem",
+            "document_symbols",
+            "git_status",
+            "diagnostics"
+        },
         source_selector = {
             winbar = true,
             statusline = false,
@@ -33,15 +46,24 @@ return {
                     display_name = " 󰉓 Files "
                 },
                 {
-                    source = "buffers",
+                    source = "document_symbols",
-                    display_name = " 󰈚 Buffers "
+                    display_name = "  Symbols "
                 },
                 {
-                    source = "document_symbols",
+                    source = "diagnostics",
-                    display_name = " 󰊢 Git "
+                    display_name = "  Diagnostics "
-                },
+                }
             },
         },
+        diagnostics = {
+            follow_current_file = { -- May also be set to `true` or `false`
+                enabled = true,     -- This will find and focus the file in the active buffer every time
+                always_focus_file = false, -- Focus the followed file, even when focus is currently on a diagnostic item belonging to that file
+                expand_followed = true, -- Ensure the node of the followed file is expanded
+                leave_dirs_open = true, -- `false` closes auto expanded dirs, such as with `:Neotree reveal`
+                leave_files_open = true, -- `false` closes auto expanded files, such as with `:Neotree reveal`
+            }
+        },
         filesystem = {
             bind_to_cwd = false,
             follow_current_file = { enabled = true },