feat: include_root option

doc/nvim-tree-lua.txt

@@ -822,6 +822,10 @@ longest line.
       Type: `string | number | fun(): number|string`
       Default: `-1`
 
+    *nvim-tree.view.width.include_root*
+    Include root folder when computing width.
+      Type: `boolean`, Default: `false`
+
     *nvim-tree.view.width.padding*
     Extra padding to the right.
       Type: `number | fun(): number|string`
@@ -3323,6 +3327,7 @@ highlight group is not, hard linking as follows: >
 |nvim-tree.view.side|
 |nvim-tree.view.signcolumn|
 |nvim-tree.view.width|
+|nvim-tree.view.width.include_root|
 |nvim-tree.view.width.max|
 |nvim-tree.view.width.min|
 |nvim-tree.view.width.padding|

lua/nvim-tree.lua

@@ -553,6 +553,7 @@ local ACCEPTED_TYPES = {
       "table",
       min = { "string", "function", "number" },
       max = { "string", "function", "number" },
+      include_root = { "boolean" },
       padding = { "function", "number" },
     },
   },

lua/nvim-tree/view.lua

@@ -12,6 +12,7 @@ local M = {}
 
 local DEFAULT_MIN_WIDTH = 30
 local DEFAULT_MAX_WIDTH = -1
+local DEFAULT_INCLUDE_ROOT = false
 local DEFAULT_PADDING = 1
 
 M.View = {
@@ -303,7 +304,7 @@ function M.open(options)
 end
 
 local function grow()
-  local starts_at = M.is_root_folder_visible(require("nvim-tree.core").get_cwd()) and 1 or 0
+  local starts_at = (M.is_root_folder_visible(require("nvim-tree.core").get_cwd()) and M.View.include_root) and 1 or 0
   local lines = vim.api.nvim_buf_get_lines(M.get_bufnr(), starts_at, -1, false)
   -- number of columns of right-padding to indicate end of path
   local padding = get_size(M.View.padding)
@@ -600,6 +601,7 @@ function M.configure_width(width)
     M.View.adaptive_size = true
     M.View.width = width.min or DEFAULT_MIN_WIDTH
     M.View.max_width = width.max or DEFAULT_MAX_WIDTH
+    M.View.include_root = width.include_root or DEFAULT_INCLUDE_ROOT
     M.View.padding = width.padding or DEFAULT_PADDING
   elseif width == nil then
     if M.config.width ~= nil then